| 1 | |
| 2 | * Copyright (C) 2014 Red Hat
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| 3 | * Copyright (C) 2014 Intel Corp.
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| 4 | *
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| 5 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 6 | * copy of this software and associated documentation files (the "Software"),
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| 7 | * to deal in the Software without restriction, including without limitation
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| 8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 9 | * and/or sell copies of the Software, and to permit persons to whom the
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| 10 | * Software is furnished to do so, subject to the following conditions:
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| 11 | *
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| 12 | * The above copyright notice and this permission notice shall be included in
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| 13 | * all copies or substantial portions of the Software.
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| 14 | *
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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| 18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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| 19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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| 20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 21 | * OTHER DEALINGS IN THE SOFTWARE.
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| 22 | *
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| 23 | * Authors:
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| 24 | * Rob Clark <[email protected]>
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| 25 | * Daniel Vetter <[email protected]>
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| 26 |
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| 27 |
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| 28 | #include <linux/export.h>
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| 29 | #include <linux/dma-fence.h>
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| 30 | #include <linux/ktime.h>
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| 31 | #include <linux/media-bus-format.h>
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| 32 |
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| 33 | #include <drm/drm_atomic.h>
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| 34 | #include <drm/drm_atomic_helper.h>
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| 35 | #include <drm/drm_atomic_uapi.h>
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| 36 | #include <drm/drm_blend.h>
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| 37 | #include <drm/drm_bridge.h>
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| 38 | #include <drm/drm_colorop.h>
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| 39 | #include <drm/drm_damage_helper.h>
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| 40 | #include <drm/drm_device.h>
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| 41 | #include <drm/drm_drv.h>
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| 42 | #include <drm/drm_framebuffer.h>
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| 43 | #include <drm/drm_gem_atomic_helper.h>
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| 44 | #include <drm/drm_panic.h>
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| 45 | #include <drm/drm_print.h>
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| 46 | #include <drm/drm_self_refresh_helper.h>
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| 47 | #include <drm/drm_vblank.h>
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| 48 | #include <drm/drm_writeback.h>
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| 49 |
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| 50 | #include "drm_crtc_helper_internal.h"
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| 51 | #include "drm_crtc_internal.h"
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| 52 |
|
| 53 | |
| 54 | * DOC: overview
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| 55 | *
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| 56 | * This helper library provides implementations of check and commit functions on
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| 57 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It
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| 58 | * also provides convenience implementations for the atomic state handling
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| 59 | * callbacks for drivers which don't need to subclass the drm core structures to
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| 60 | * add their own additional internal state.
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| 61 | *
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| 62 | * This library also provides default implementations for the check callback in
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| 63 | * drm_atomic_helper_check() and for the commit callback with
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| 64 | * drm_atomic_helper_commit(). But the individual stages and callbacks are
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| 65 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only
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| 66 | * together with a driver private modeset implementation.
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| 67 | *
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| 68 | * This library also provides implementations for all the legacy driver
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| 69 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(),
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| 70 | * drm_atomic_helper_disable_plane(), and the various functions to implement
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| 71 | * set_property callbacks. New drivers must not implement these functions
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| 72 | * themselves but must use the provided helpers.
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| 73 | *
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| 74 | * The atomic helper uses the same function table structures as all other
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| 75 | * modesetting helpers. See the documentation for &struct drm_crtc_helper_funcs,
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| 76 | * struct &drm_encoder_helper_funcs and &struct drm_connector_helper_funcs. It
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| 77 | * also shares the &struct drm_plane_helper_funcs function table with the plane
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| 78 | * helpers.
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| 79 |
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| 80 | static void
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| 81 | drm_atomic_helper_plane_changed(struct drm_atomic_commit *state,
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| 82 | struct drm_plane_state *old_plane_state,
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| 83 | struct drm_plane_state *plane_state,
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| 84 | struct drm_plane *plane)
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| 85 | {
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| 86 | struct drm_crtc_state *crtc_state;
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| 87 |
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| 88 | if (old_plane_state->crtc) {
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| 89 | crtc_state = drm_atomic_get_new_crtc_state(state,
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| 90 | old_plane_state->crtc);
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| 91 |
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| 92 | if (WARN_ON(!crtc_state))
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| 93 | return;
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| 94 |
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| 95 | crtc_state->planes_changed = true;
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| 96 | }
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| 97 |
|
| 98 | if (plane_state->crtc) {
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| 99 | crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc);
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| 100 |
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| 101 | if (WARN_ON(!crtc_state))
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| 102 | return;
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| 103 |
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| 104 | crtc_state->planes_changed = true;
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| 105 | }
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| 106 | }
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| 107 |
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| 108 | static int handle_conflicting_encoders(struct drm_atomic_commit *state,
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| 109 | bool disable_conflicting_encoders)
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| 110 | {
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| 111 | struct drm_connector_state *new_conn_state;
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| 112 | struct drm_connector *connector;
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| 113 | struct drm_connector_list_iter conn_iter;
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| 114 | struct drm_encoder *encoder;
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| 115 | unsigned int encoder_mask = 0;
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| 116 | int i, ret = 0;
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| 117 |
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| 118 | |
| 119 | * First loop, find all newly assigned encoders from the connectors
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| 120 | * part of the state. If the same encoder is assigned to multiple
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| 121 | * connectors bail out.
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| 122 |
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| 123 | for_each_new_connector_in_state(state, connector, new_conn_state, i) {
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| 124 | const struct drm_connector_helper_funcs *funcs = connector->helper_private;
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| 125 | struct drm_encoder *new_encoder;
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| 126 |
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| 127 | if (!new_conn_state->crtc)
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| 128 | continue;
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| 129 |
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| 130 | if (funcs->atomic_best_encoder)
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| 131 | new_encoder = funcs->atomic_best_encoder(connector,
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| 132 | state);
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| 133 | else if (funcs->best_encoder)
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| 134 | new_encoder = funcs->best_encoder(connector);
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| 135 | else
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| 136 | new_encoder = drm_connector_get_single_encoder(connector);
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| 137 |
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| 138 | if (new_encoder) {
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| 139 | if (encoder_mask & drm_encoder_mask(new_encoder)) {
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| 140 | drm_dbg_atomic(connector->dev,
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| 141 | "[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n",
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| 142 | new_encoder->base.id, new_encoder->name,
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| 143 | connector->base.id, connector->name);
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| 144 |
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| 145 | return -EINVAL;
|
| 146 | }
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| 147 |
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| 148 | encoder_mask |= drm_encoder_mask(new_encoder);
|
| 149 | }
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| 150 | }
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| 151 |
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| 152 | if (!encoder_mask)
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| 153 | return 0;
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| 154 |
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| 155 | |
| 156 | * Second loop, iterate over all connectors not part of the state.
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| 157 | *
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| 158 | * If a conflicting encoder is found and disable_conflicting_encoders
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| 159 | * is not set, an error is returned. Userspace can provide a solution
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| 160 | * through the atomic ioctl.
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| 161 | *
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| 162 | * If the flag is set conflicting connectors are removed from the CRTC
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| 163 | * and the CRTC is disabled if no encoder is left. This preserves
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| 164 | * compatibility with the legacy set_config behavior.
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| 165 |
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| 166 | drm_connector_list_iter_begin(state->dev, &conn_iter);
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| 167 | drm_for_each_connector_iter(connector, &conn_iter) {
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| 168 | struct drm_crtc_state *crtc_state;
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| 169 |
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| 170 | if (drm_atomic_get_new_connector_state(state, connector))
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| 171 | continue;
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| 172 |
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| 173 | encoder = connector->state->best_encoder;
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| 174 | if (!encoder || !(encoder_mask & drm_encoder_mask(encoder)))
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| 175 | continue;
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| 176 |
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| 177 | if (!disable_conflicting_encoders) {
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| 178 | drm_dbg_atomic(connector->dev,
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| 179 | "[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n",
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| 180 | encoder->base.id, encoder->name,
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| 181 | connector->state->crtc->base.id,
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| 182 | connector->state->crtc->name,
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| 183 | connector->base.id, connector->name);
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| 184 | ret = -EINVAL;
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| 185 | goto out;
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| 186 | }
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| 187 |
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| 188 | new_conn_state = drm_atomic_get_connector_state(state, connector);
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| 189 | if (IS_ERR(new_conn_state)) {
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| 190 | ret = PTR_ERR(new_conn_state);
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| 191 | goto out;
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| 192 | }
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| 193 |
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| 194 | drm_dbg_atomic(connector->dev,
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| 195 | "[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n",
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| 196 | encoder->base.id, encoder->name,
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| 197 | new_conn_state->crtc->base.id, new_conn_state->crtc->name,
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| 198 | connector->base.id, connector->name);
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| 199 |
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| 200 | crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
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| 201 |
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| 202 | ret = drm_atomic_set_crtc_for_connector(new_conn_state, NULL);
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| 203 | if (ret)
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| 204 | goto out;
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| 205 |
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| 206 | if (!crtc_state->connector_mask) {
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| 207 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state,
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| 208 | NULL);
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| 209 | if (ret < 0)
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| 210 | goto out;
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| 211 |
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| 212 | crtc_state->active = false;
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| 213 | }
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| 214 | }
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| 215 | out:
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| 216 | drm_connector_list_iter_end(&conn_iter);
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| 217 |
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| 218 | return ret;
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| 219 | }
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| 220 |
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| 221 | static void
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| 222 | set_best_encoder(struct drm_atomic_commit *state,
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| 223 | struct drm_connector_state *conn_state,
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| 224 | struct drm_encoder *encoder)
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| 225 | {
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| 226 | struct drm_crtc_state *crtc_state;
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| 227 | struct drm_crtc *crtc;
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| 228 |
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| 229 | if (conn_state->best_encoder) {
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| 230 |
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| 231 | crtc = conn_state->connector->state->crtc;
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| 232 |
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| 233 | |
| 234 | * duplicated a NULL best_encoder when crtc was NULL.
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| 235 | * As an exception restoring duplicated atomic state
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| 236 | * during resume is allowed, so don't warn when
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| 237 | * best_encoder is equal to encoder we intend to set.
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| 238 |
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| 239 | WARN_ON(!crtc && encoder != conn_state->best_encoder);
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| 240 | if (crtc) {
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| 241 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
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| 242 |
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| 243 | crtc_state->encoder_mask &=
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| 244 | ~drm_encoder_mask(conn_state->best_encoder);
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| 245 | }
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| 246 | }
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| 247 |
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| 248 | if (encoder) {
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| 249 | crtc = conn_state->crtc;
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| 250 | WARN_ON(!crtc);
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| 251 | if (crtc) {
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| 252 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
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| 253 |
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| 254 | crtc_state->encoder_mask |=
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| 255 | drm_encoder_mask(encoder);
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| 256 | }
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| 257 | }
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| 258 |
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| 259 | conn_state->best_encoder = encoder;
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| 260 | }
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| 261 |
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| 262 | static void
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| 263 | steal_encoder(struct drm_atomic_commit *state,
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| 264 | struct drm_encoder *encoder)
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| 265 | {
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| 266 | struct drm_crtc_state *crtc_state;
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| 267 | struct drm_connector *connector;
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| 268 | struct drm_connector_state *old_connector_state, *new_connector_state;
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| 269 | int i;
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| 270 |
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| 271 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) {
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| 272 | struct drm_crtc *encoder_crtc;
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| 273 |
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| 274 | if (new_connector_state->best_encoder != encoder)
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| 275 | continue;
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| 276 |
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| 277 | encoder_crtc = old_connector_state->crtc;
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| 278 |
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| 279 | drm_dbg_atomic(encoder->dev,
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| 280 | "[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n",
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| 281 | encoder->base.id, encoder->name,
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| 282 | encoder_crtc->base.id, encoder_crtc->name);
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| 283 |
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| 284 | set_best_encoder(state, new_connector_state, NULL);
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| 285 |
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| 286 | crtc_state = drm_atomic_get_new_crtc_state(state, encoder_crtc);
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| 287 | crtc_state->connectors_changed = true;
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| 288 |
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| 289 | return;
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| 290 | }
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| 291 | }
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| 292 |
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| 293 | static int
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| 294 | update_connector_routing(struct drm_atomic_commit *state,
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| 295 | struct drm_connector *connector,
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| 296 | struct drm_connector_state *old_connector_state,
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| 297 | struct drm_connector_state *new_connector_state,
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| 298 | bool added_by_user)
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| 299 | {
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| 300 | const struct drm_connector_helper_funcs *funcs;
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| 301 | struct drm_encoder *new_encoder;
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| 302 | struct drm_crtc_state *crtc_state;
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| 303 |
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| 304 | drm_dbg_atomic(connector->dev, "Updating routing for [CONNECTOR:%d:%s]\n",
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| 305 | connector->base.id, connector->name);
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| 306 |
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| 307 | if (old_connector_state->crtc != new_connector_state->crtc) {
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| 308 | if (old_connector_state->crtc) {
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| 309 | crtc_state = drm_atomic_get_new_crtc_state(state, old_connector_state->crtc);
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| 310 | crtc_state->connectors_changed = true;
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| 311 | }
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| 312 |
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| 313 | if (new_connector_state->crtc) {
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| 314 | crtc_state = drm_atomic_get_new_crtc_state(state, new_connector_state->crtc);
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| 315 | crtc_state->connectors_changed = true;
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| 316 | }
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| 317 | }
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| 318 |
|
| 319 | if (!new_connector_state->crtc) {
|
| 320 | drm_dbg_atomic(connector->dev, "Disabling [CONNECTOR:%d:%s]\n",
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| 321 | connector->base.id, connector->name);
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| 322 |
|
| 323 | set_best_encoder(state, new_connector_state, NULL);
|
| 324 |
|
| 325 | return 0;
|
| 326 | }
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| 327 |
|
| 328 | crtc_state = drm_atomic_get_new_crtc_state(state,
|
| 329 | new_connector_state->crtc);
|
| 330 | |
| 331 | * For compatibility with legacy users, we want to make sure that
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| 332 | * we allow DPMS On->Off modesets on unregistered connectors. Modesets
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| 333 | * which would result in anything else must be considered invalid, to
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| 334 | * avoid turning on new displays on dead connectors.
|
| 335 | *
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| 336 | * Since the connector can be unregistered at any point during an
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| 337 | * atomic check or commit, this is racy. But that's OK: all we care
|
| 338 | * about is ensuring that userspace can't do anything but shut off the
|
| 339 | * display on a connector that was destroyed after it's been notified,
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| 340 | * not before.
|
| 341 | *
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| 342 | * Additionally, we also want to ignore connector registration when
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| 343 | * we're trying to restore an atomic state during system resume since
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| 344 | * there's a chance the connector may have been destroyed during the
|
| 345 | * process, but it's better to ignore that then cause
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| 346 | * drm_atomic_helper_resume() to fail.
|
| 347 | *
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| 348 | * Last, we want to ignore connector registration when the connector
|
| 349 | * was not pulled in the atomic state by user-space (ie, was pulled
|
| 350 | * in by the driver, e.g. when updating a DP-MST stream).
|
| 351 |
|
| 352 | if (!state->duplicated && drm_connector_is_unregistered(connector) &&
|
| 353 | added_by_user && crtc_state->active) {
|
| 354 | drm_dbg_atomic(connector->dev,
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| 355 | "[CONNECTOR:%d:%s] is not registered\n",
|
| 356 | connector->base.id, connector->name);
|
| 357 | return -EINVAL;
|
| 358 | }
|
| 359 |
|
| 360 | funcs = connector->helper_private;
|
| 361 |
|
| 362 | if (funcs->atomic_best_encoder)
|
| 363 | new_encoder = funcs->atomic_best_encoder(connector, state);
|
| 364 | else if (funcs->best_encoder)
|
| 365 | new_encoder = funcs->best_encoder(connector);
|
| 366 | else
|
| 367 | new_encoder = drm_connector_get_single_encoder(connector);
|
| 368 |
|
| 369 | if (!new_encoder) {
|
| 370 | drm_dbg_atomic(connector->dev,
|
| 371 | "No suitable encoder found for [CONNECTOR:%d:%s]\n",
|
| 372 | connector->base.id, connector->name);
|
| 373 | return -EINVAL;
|
| 374 | }
|
| 375 |
|
| 376 | if (!drm_encoder_crtc_ok(new_encoder, new_connector_state->crtc)) {
|
| 377 | drm_dbg_atomic(connector->dev,
|
| 378 | "[ENCODER:%d:%s] incompatible with [CRTC:%d:%s]\n",
|
| 379 | new_encoder->base.id,
|
| 380 | new_encoder->name,
|
| 381 | new_connector_state->crtc->base.id,
|
| 382 | new_connector_state->crtc->name);
|
| 383 | return -EINVAL;
|
| 384 | }
|
| 385 |
|
| 386 | if (new_encoder == new_connector_state->best_encoder) {
|
| 387 | set_best_encoder(state, new_connector_state, new_encoder);
|
| 388 |
|
| 389 | drm_dbg_atomic(connector->dev,
|
| 390 | "[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n",
|
| 391 | connector->base.id,
|
| 392 | connector->name,
|
| 393 | new_encoder->base.id,
|
| 394 | new_encoder->name,
|
| 395 | new_connector_state->crtc->base.id,
|
| 396 | new_connector_state->crtc->name);
|
| 397 |
|
| 398 | return 0;
|
| 399 | }
|
| 400 |
|
| 401 | steal_encoder(state, new_encoder);
|
| 402 |
|
| 403 | set_best_encoder(state, new_connector_state, new_encoder);
|
| 404 |
|
| 405 | crtc_state->connectors_changed = true;
|
| 406 |
|
| 407 | drm_dbg_atomic(connector->dev,
|
| 408 | "[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n",
|
| 409 | connector->base.id,
|
| 410 | connector->name,
|
| 411 | new_encoder->base.id,
|
| 412 | new_encoder->name,
|
| 413 | new_connector_state->crtc->base.id,
|
| 414 | new_connector_state->crtc->name);
|
| 415 |
|
| 416 | return 0;
|
| 417 | }
|
| 418 |
|
| 419 | static int
|
| 420 | mode_fixup(struct drm_atomic_commit *state)
|
| 421 | {
|
| 422 | struct drm_crtc *crtc;
|
| 423 | struct drm_crtc_state *new_crtc_state;
|
| 424 | struct drm_connector *connector;
|
| 425 | struct drm_connector_state *new_conn_state;
|
| 426 | int i;
|
| 427 | int ret;
|
| 428 |
|
| 429 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
|
| 430 | if (!new_crtc_state->mode_changed &&
|
| 431 | !new_crtc_state->connectors_changed)
|
| 432 | continue;
|
| 433 |
|
| 434 | drm_mode_copy(&new_crtc_state->adjusted_mode, &new_crtc_state->mode);
|
| 435 | }
|
| 436 |
|
| 437 | for_each_new_connector_in_state(state, connector, new_conn_state, i) {
|
| 438 | const struct drm_encoder_helper_funcs *funcs;
|
| 439 | struct drm_encoder *encoder;
|
| 440 | struct drm_bridge *bridge;
|
| 441 |
|
| 442 | WARN_ON(!!new_conn_state->best_encoder != !!new_conn_state->crtc);
|
| 443 |
|
| 444 | if (!new_conn_state->crtc || !new_conn_state->best_encoder)
|
| 445 | continue;
|
| 446 |
|
| 447 | new_crtc_state =
|
| 448 | drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
|
| 449 |
|
| 450 | |
| 451 | * Each encoder has at most one connector (since we always steal
|
| 452 | * it away), so we won't call ->mode_fixup twice.
|
| 453 |
|
| 454 | encoder = new_conn_state->best_encoder;
|
| 455 | funcs = encoder->helper_private;
|
| 456 |
|
| 457 | bridge = drm_bridge_chain_get_first_bridge(encoder);
|
| 458 | ret = drm_atomic_bridge_chain_check(bridge,
|
| 459 | new_crtc_state,
|
| 460 | new_conn_state);
|
| 461 | drm_bridge_put(bridge);
|
| 462 | if (ret) {
|
| 463 | drm_dbg_atomic(encoder->dev, "Bridge atomic check failed\n");
|
| 464 | return ret;
|
| 465 | }
|
| 466 |
|
| 467 | if (funcs && funcs->atomic_check) {
|
| 468 | ret = funcs->atomic_check(encoder, new_crtc_state,
|
| 469 | new_conn_state);
|
| 470 | if (ret) {
|
| 471 | drm_dbg_atomic(encoder->dev,
|
| 472 | "[ENCODER:%d:%s] check failed\n",
|
| 473 | encoder->base.id, encoder->name);
|
| 474 | return ret;
|
| 475 | }
|
| 476 | } else if (funcs && funcs->mode_fixup) {
|
| 477 | ret = funcs->mode_fixup(encoder, &new_crtc_state->mode,
|
| 478 | &new_crtc_state->adjusted_mode);
|
| 479 | if (!ret) {
|
| 480 | drm_dbg_atomic(encoder->dev,
|
| 481 | "[ENCODER:%d:%s] fixup failed\n",
|
| 482 | encoder->base.id, encoder->name);
|
| 483 | return -EINVAL;
|
| 484 | }
|
| 485 | }
|
| 486 | }
|
| 487 |
|
| 488 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
|
| 489 | const struct drm_crtc_helper_funcs *funcs;
|
| 490 |
|
| 491 | if (!new_crtc_state->enable)
|
| 492 | continue;
|
| 493 |
|
| 494 | if (!new_crtc_state->mode_changed &&
|
| 495 | !new_crtc_state->connectors_changed)
|
| 496 | continue;
|
| 497 |
|
| 498 | funcs = crtc->helper_private;
|
| 499 | if (!funcs || !funcs->mode_fixup)
|
| 500 | continue;
|
| 501 |
|
| 502 | ret = funcs->mode_fixup(crtc, &new_crtc_state->mode,
|
| 503 | &new_crtc_state->adjusted_mode);
|
| 504 | if (!ret) {
|
| 505 | drm_dbg_atomic(crtc->dev, "[CRTC:%d:%s] fixup failed\n",
|
| 506 | crtc->base.id, crtc->name);
|
| 507 | return -EINVAL;
|
| 508 | }
|
| 509 | }
|
| 510 |
|
| 511 | return 0;
|
| 512 | }
|
| 513 |
|
| 514 | static enum drm_mode_status mode_valid_path(struct drm_connector *connector,
|
| 515 | struct drm_encoder *encoder,
|
| 516 | struct drm_crtc *crtc,
|
| 517 | const struct drm_display_mode *mode)
|
| 518 | {
|
| 519 | struct drm_bridge *bridge;
|
| 520 | enum drm_mode_status ret;
|
| 521 |
|
| 522 | ret = drm_encoder_mode_valid(encoder, mode);
|
| 523 | if (ret != MODE_OK) {
|
| 524 | drm_dbg_atomic(encoder->dev,
|
| 525 | "[ENCODER:%d:%s] mode_valid() failed\n",
|
| 526 | encoder->base.id, encoder->name);
|
| 527 | return ret;
|
| 528 | }
|
| 529 |
|
| 530 | bridge = drm_bridge_chain_get_first_bridge(encoder);
|
| 531 | ret = drm_bridge_chain_mode_valid(bridge, &connector->display_info,
|
| 532 | mode);
|
| 533 | drm_bridge_put(bridge);
|
| 534 | if (ret != MODE_OK) {
|
| 535 | drm_dbg_atomic(encoder->dev, "[BRIDGE] mode_valid() failed\n");
|
| 536 | return ret;
|
| 537 | }
|
| 538 |
|
| 539 | ret = drm_crtc_mode_valid(crtc, mode);
|
| 540 | if (ret != MODE_OK) {
|
| 541 | drm_dbg_atomic(encoder->dev, "[CRTC:%d:%s] mode_valid() failed\n",
|
| 542 | crtc->base.id, crtc->name);
|
| 543 | return ret;
|
| 544 | }
|
| 545 |
|
| 546 | return ret;
|
| 547 | }
|
| 548 |
|
| 549 | static int
|
| 550 | mode_valid(struct drm_atomic_commit *state)
|
| 551 | {
|
| 552 | struct drm_connector_state *conn_state;
|
| 553 | struct drm_connector *connector;
|
| 554 | int i;
|
| 555 |
|
| 556 | for_each_new_connector_in_state(state, connector, conn_state, i) {
|
| 557 | struct drm_encoder *encoder = conn_state->best_encoder;
|
| 558 | struct drm_crtc *crtc = conn_state->crtc;
|
| 559 | struct drm_crtc_state *crtc_state;
|
| 560 | enum drm_mode_status mode_status;
|
| 561 | const struct drm_display_mode *mode;
|
| 562 |
|
| 563 | if (!crtc || !encoder)
|
| 564 | continue;
|
| 565 |
|
| 566 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
|
| 567 | if (!crtc_state)
|
| 568 | continue;
|
| 569 | if (!crtc_state->mode_changed && !crtc_state->connectors_changed)
|
| 570 | continue;
|
| 571 |
|
| 572 | mode = &crtc_state->mode;
|
| 573 |
|
| 574 | mode_status = mode_valid_path(connector, encoder, crtc, mode);
|
| 575 | if (mode_status != MODE_OK)
|
| 576 | return -EINVAL;
|
| 577 | }
|
| 578 |
|
| 579 | return 0;
|
| 580 | }
|
| 581 |
|
| 582 | static int drm_atomic_check_valid_clones(struct drm_atomic_commit *state,
|
| 583 | struct drm_crtc *crtc)
|
| 584 | {
|
| 585 | struct drm_encoder *drm_enc;
|
| 586 | struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
|
| 587 | crtc);
|
| 588 |
|
| 589 | drm_for_each_encoder_mask(drm_enc, crtc->dev, crtc_state->encoder_mask) {
|
| 590 | if (!drm_enc->possible_clones) {
|
| 591 | DRM_DEBUG("enc%d possible_clones is 0\n", drm_enc->base.id);
|
| 592 | continue;
|
| 593 | }
|
| 594 |
|
| 595 | if ((crtc_state->encoder_mask & drm_enc->possible_clones) !=
|
| 596 | crtc_state->encoder_mask) {
|
| 597 | DRM_DEBUG("crtc%d failed valid clone check for mask 0x%x\n",
|
| 598 | crtc->base.id, crtc_state->encoder_mask);
|
| 599 | return -EINVAL;
|
| 600 | }
|
| 601 | }
|
| 602 |
|
| 603 | return 0;
|
| 604 | }
|
| 605 |
|
| 606 | |
| 607 | * drm_atomic_helper_check_modeset - validate state object for modeset changes
|
| 608 | * @dev: DRM device
|
| 609 | * @state: the driver state object
|
| 610 | *
|
| 611 | * Check the state object to see if the requested state is physically possible.
|
| 612 | * This does all the CRTC and connector related computations for an atomic
|
| 613 | * update and adds any additional connectors needed for full modesets. It calls
|
| 614 | * the various per-object callbacks in the follow order:
|
| 615 | *
|
| 616 | * 1. &drm_connector_helper_funcs.atomic_best_encoder for determining the new encoder.
|
| 617 | * 2. &drm_connector_helper_funcs.atomic_check to validate the connector state.
|
| 618 | * 3. If it's determined a modeset is needed then all connectors on the affected
|
| 619 | * CRTC are added and &drm_connector_helper_funcs.atomic_check is run on them.
|
| 620 | * 4. &drm_encoder_helper_funcs.mode_valid, &drm_bridge_funcs.mode_valid and
|
| 621 | * &drm_crtc_helper_funcs.mode_valid are called on the affected components.
|
| 622 | * 5. &drm_bridge_funcs.mode_fixup is called on all encoder bridges.
|
| 623 | * 6. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state.
|
| 624 | * This function is only called when the encoder will be part of a configured CRTC,
|
| 625 | * it must not be used for implementing connector property validation.
|
| 626 | * If this function is NULL, &drm_atomic_encoder_helper_funcs.mode_fixup is called
|
| 627 | * instead.
|
| 628 | * 7. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with CRTC constraints.
|
| 629 | *
|
| 630 | * &drm_crtc_state.mode_changed is set when the input mode is changed.
|
| 631 | * &drm_crtc_state.connectors_changed is set when a connector is added or
|
| 632 | * removed from the CRTC. &drm_crtc_state.active_changed is set when
|
| 633 | * &drm_crtc_state.active changes, which is used for DPMS.
|
| 634 | * &drm_crtc_state.no_vblank is set from the result of drm_dev_has_vblank().
|
| 635 | * See also: drm_atomic_crtc_needs_modeset()
|
| 636 | *
|
| 637 | * IMPORTANT:
|
| 638 | *
|
| 639 | * Drivers which set &drm_crtc_state.mode_changed (e.g. in their
|
| 640 | * &drm_plane_helper_funcs.atomic_check hooks if a plane update can't be done
|
| 641 | * without a full modeset) _must_ call this function after that change. It is
|
| 642 | * permitted to call this function multiple times for the same update, e.g.
|
| 643 | * when the &drm_crtc_helper_funcs.atomic_check functions depend upon the
|
| 644 | * adjusted dotclock for fifo space allocation and watermark computation.
|
| 645 | *
|
| 646 | * RETURNS:
|
| 647 | * Zero for success or -errno
|
| 648 |
|
| 649 | int
|
| 650 | drm_atomic_helper_check_modeset(struct drm_device *dev,
|
| 651 | struct drm_atomic_commit *state)
|
| 652 | {
|
| 653 | struct drm_crtc *crtc;
|
| 654 | struct drm_crtc_state *old_crtc_state, *new_crtc_state;
|
| 655 | struct drm_connector *connector;
|
| 656 | struct drm_connector_state *old_connector_state, *new_connector_state;
|
| 657 | int i, ret;
|
| 658 | unsigned int connectors_mask = 0, user_connectors_mask = 0;
|
| 659 |
|
| 660 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i)
|
| 661 | user_connectors_mask |= BIT(i);
|
| 662 |
|
| 663 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
|
| 664 | bool has_connectors =
|
| 665 | !!new_crtc_state->connector_mask;
|
| 666 |
|
| 667 | WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
|
| 668 |
|
| 669 | if (!drm_mode_equal(&old_crtc_state->mode, &new_crtc_state->mode)) {
|
| 670 | drm_dbg_atomic(dev, "[CRTC:%d:%s] mode changed\n",
|
| 671 | crtc->base.id, crtc->name);
|
| 672 | new_crtc_state->mode_changed = true;
|
| 673 | }
|
| 674 |
|
| 675 | if (old_crtc_state->enable != new_crtc_state->enable) {
|
| 676 | drm_dbg_atomic(dev, "[CRTC:%d:%s] enable changed\n",
|
| 677 | crtc->base.id, crtc->name);
|
| 678 |
|
| 679 | |
| 680 | * For clarity this assignment is done here, but
|
| 681 | * enable == 0 is only true when there are no
|
| 682 | * connectors and a NULL mode.
|
| 683 | *
|
| 684 | * The other way around is true as well. enable != 0
|
| 685 | * implies that connectors are attached and a mode is set.
|
| 686 |
|
| 687 | new_crtc_state->mode_changed = true;
|
| 688 | new_crtc_state->connectors_changed = true;
|
| 689 | }
|
| 690 |
|
| 691 | if (old_crtc_state->active != new_crtc_state->active) {
|
| 692 | drm_dbg_atomic(dev, "[CRTC:%d:%s] active changed\n",
|
| 693 | crtc->base.id, crtc->name);
|
| 694 | new_crtc_state->active_changed = true;
|
| 695 | }
|
| 696 |
|
| 697 | if (new_crtc_state->enable != has_connectors) {
|
| 698 | drm_dbg_atomic(dev, "[CRTC:%d:%s] enabled/connectors mismatch (%d/%d)\n",
|
| 699 | crtc->base.id, crtc->name,
|
| 700 | new_crtc_state->enable, has_connectors);
|
| 701 |
|
| 702 | return -EINVAL;
|
| 703 | }
|
| 704 |
|
| 705 | if (drm_dev_has_vblank(dev))
|
| 706 | new_crtc_state->no_vblank = false;
|
| 707 | else
|
| 708 | new_crtc_state->no_vblank = true;
|
| 709 | }
|
| 710 |
|
| 711 | ret = handle_conflicting_encoders(state, false);
|
| 712 | if (ret)
|
| 713 | return ret;
|
| 714 |
|
| 715 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) {
|
| 716 | const struct drm_connector_helper_funcs *funcs = connector->helper_private;
|
| 717 |
|
| 718 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
|
| 719 |
|
| 720 | |
| 721 | * This only sets crtc->connectors_changed for routing changes,
|
| 722 | * drivers must set crtc->connectors_changed themselves when
|
| 723 | * connector properties need to be updated.
|
| 724 |
|
| 725 | ret = update_connector_routing(state, connector,
|
| 726 | old_connector_state,
|
| 727 | new_connector_state,
|
| 728 | BIT(i) & user_connectors_mask);
|
| 729 | if (ret)
|
| 730 | return ret;
|
| 731 | if (old_connector_state->crtc) {
|
| 732 | new_crtc_state = drm_atomic_get_new_crtc_state(state,
|
| 733 | old_connector_state->crtc);
|
| 734 | if (old_connector_state->link_status !=
|
| 735 | new_connector_state->link_status)
|
| 736 | new_crtc_state->connectors_changed = true;
|
| 737 |
|
| 738 | if (old_connector_state->max_requested_bpc !=
|
| 739 | new_connector_state->max_requested_bpc)
|
| 740 | new_crtc_state->connectors_changed = true;
|
| 741 |
|
| 742 | if (old_connector_state->color_format !=
|
| 743 | new_connector_state->color_format)
|
| 744 | new_crtc_state->connectors_changed = true;
|
| 745 |
|
| 746 | }
|
| 747 |
|
| 748 | if (funcs->atomic_check)
|
| 749 | ret = funcs->atomic_check(connector, state);
|
| 750 | if (ret) {
|
| 751 | drm_dbg_atomic(dev,
|
| 752 | "[CONNECTOR:%d:%s] driver check failed\n",
|
| 753 | connector->base.id, connector->name);
|
| 754 | return ret;
|
| 755 | }
|
| 756 |
|
| 757 | connectors_mask |= BIT(i);
|
| 758 | }
|
| 759 |
|
| 760 | |
| 761 | * After all the routing has been prepared we need to add in any
|
| 762 | * connector which is itself unchanged, but whose CRTC changes its
|
| 763 | * configuration. This must be done before calling mode_fixup in case a
|
| 764 | * crtc only changed its mode but has the same set of connectors.
|
| 765 |
|
| 766 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
|
| 767 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
|
| 768 | continue;
|
| 769 |
|
| 770 | drm_dbg_atomic(dev,
|
| 771 | "[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n",
|
| 772 | crtc->base.id, crtc->name,
|
| 773 | new_crtc_state->enable ? 'y' : 'n',
|
| 774 | new_crtc_state->active ? 'y' : 'n');
|
| 775 |
|
| 776 | ret = drm_atomic_add_affected_connectors(state, crtc);
|
| 777 | if (ret != 0)
|
| 778 | return ret;
|
| 779 |
|
| 780 | ret = drm_atomic_add_affected_planes(state, crtc);
|
| 781 | if (ret != 0)
|
| 782 | return ret;
|
| 783 |
|
| 784 | ret = drm_atomic_check_valid_clones(state, crtc);
|
| 785 | if (ret != 0)
|
| 786 | return ret;
|
| 787 | }
|
| 788 |
|
| 789 | |
| 790 | * Iterate over all connectors again, to make sure atomic_check()
|
| 791 | * has been called on them when a modeset is forced.
|
| 792 |
|
| 793 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) {
|
| 794 | const struct drm_connector_helper_funcs *funcs = connector->helper_private;
|
| 795 |
|
| 796 | if (connectors_mask & BIT(i))
|
| 797 | continue;
|
| 798 |
|
| 799 | if (funcs->atomic_check)
|
| 800 | ret = funcs->atomic_check(connector, state);
|
| 801 | if (ret) {
|
| 802 | drm_dbg_atomic(dev,
|
| 803 | "[CONNECTOR:%d:%s] driver check failed\n",
|
| 804 | connector->base.id, connector->name);
|
| 805 | return ret;
|
| 806 | }
|
| 807 | }
|
| 808 |
|
| 809 | |
| 810 | * Iterate over all connectors again, and add all affected bridges to
|
| 811 | * the state.
|
| 812 |
|
| 813 | for_each_oldnew_connector_in_state(state, connector,
|
| 814 | old_connector_state,
|
| 815 | new_connector_state, i) {
|
| 816 | struct drm_encoder *encoder;
|
| 817 |
|
| 818 | encoder = old_connector_state->best_encoder;
|
| 819 | ret = drm_atomic_add_encoder_bridges(state, encoder);
|
| 820 | if (ret)
|
| 821 | return ret;
|
| 822 |
|
| 823 | encoder = new_connector_state->best_encoder;
|
| 824 | ret = drm_atomic_add_encoder_bridges(state, encoder);
|
| 825 | if (ret)
|
| 826 | return ret;
|
| 827 | }
|
| 828 |
|
| 829 | ret = mode_valid(state);
|
| 830 | if (ret)
|
| 831 | return ret;
|
| 832 |
|
| 833 | return mode_fixup(state);
|
| 834 | }
|
| 835 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset);
|
| 836 |
|
| 837 | |
| 838 | * drm_atomic_helper_check_wb_connector_state() - Check writeback connector state
|
| 839 | * @connector: corresponding connector
|
| 840 | * @state: the driver state object
|
| 841 | *
|
| 842 | * Checks if the writeback connector state is valid, and returns an error if it
|
| 843 | * isn't.
|
| 844 | *
|
| 845 | * RETURNS:
|
| 846 | * Zero for success or -errno
|
| 847 |
|
| 848 | int
|
| 849 | drm_atomic_helper_check_wb_connector_state(struct drm_connector *connector,
|
| 850 | struct drm_atomic_commit *state)
|
| 851 | {
|
| 852 | struct drm_connector_state *conn_state =
|
| 853 | drm_atomic_get_new_connector_state(state, connector);
|
| 854 | struct drm_writeback_job *wb_job = conn_state->writeback_job;
|
| 855 | struct drm_property_blob *pixel_format_blob;
|
| 856 | struct drm_framebuffer *fb;
|
| 857 | size_t i, nformats;
|
| 858 | u32 *formats;
|
| 859 |
|
| 860 | if (!wb_job || !wb_job->fb)
|
| 861 | return 0;
|
| 862 |
|
| 863 | pixel_format_blob = wb_job->connector->pixel_formats_blob_ptr;
|
| 864 | nformats = pixel_format_blob->length / sizeof(u32);
|
| 865 | formats = pixel_format_blob->data;
|
| 866 | fb = wb_job->fb;
|
| 867 |
|
| 868 | for (i = 0; i < nformats; i++)
|
| 869 | if (fb->format->format == formats[i])
|
| 870 | return 0;
|
| 871 |
|
| 872 | drm_dbg_kms(connector->dev, "Invalid pixel format %p4cc\n", &fb->format->format);
|
| 873 |
|
| 874 | return -EINVAL;
|
| 875 | }
|
| 876 | EXPORT_SYMBOL(drm_atomic_helper_check_wb_connector_state);
|
| 877 |
|
| 878 | |
| 879 | * drm_atomic_helper_check_plane_state() - Check plane state for validity
|
| 880 | * @plane_state: plane state to check
|
| 881 | * @crtc_state: CRTC state to check
|
| 882 | * @min_scale: minimum @src:@dest scaling factor in 16.16 fixed point
|
| 883 | * @max_scale: maximum @src:@dest scaling factor in 16.16 fixed point
|
| 884 | * @can_position: is it legal to position the plane such that it
|
| 885 | * doesn't cover the entire CRTC? This will generally
|
| 886 | * only be false for primary planes.
|
| 887 | * @can_update_disabled: can the plane be updated while the CRTC
|
| 888 | * is disabled?
|
| 889 | *
|
| 890 | * Checks that a desired plane update is valid, and updates various
|
| 891 | * bits of derived state (clipped coordinates etc.). Drivers that provide
|
| 892 | * their own plane handling rather than helper-provided implementations may
|
| 893 | * still wish to call this function to avoid duplication of error checking
|
| 894 | * code.
|
| 895 | *
|
| 896 | * RETURNS:
|
| 897 | * Zero if update appears valid, error code on failure
|
| 898 |
|
| 899 | int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
|
| 900 | const struct drm_crtc_state *crtc_state,
|
| 901 | int min_scale,
|
| 902 | int max_scale,
|
| 903 | bool can_position,
|
| 904 | bool can_update_disabled)
|
| 905 | {
|
| 906 | struct drm_framebuffer *fb = plane_state->fb;
|
| 907 | struct drm_rect *src = &plane_state->src;
|
| 908 | struct drm_rect *dst = &plane_state->dst;
|
| 909 | unsigned int rotation = plane_state->rotation;
|
| 910 | struct drm_rect clip = {};
|
| 911 | int hscale, vscale;
|
| 912 |
|
| 913 | WARN_ON(plane_state->crtc && plane_state->crtc != crtc_state->crtc);
|
| 914 |
|
| 915 | *src = drm_plane_state_src(plane_state);
|
| 916 | *dst = drm_plane_state_dest(plane_state);
|
| 917 |
|
| 918 | if (!fb) {
|
| 919 | plane_state->visible = false;
|
| 920 | return 0;
|
| 921 | }
|
| 922 |
|
| 923 |
|
| 924 | if (WARN_ON(!plane_state->crtc)) {
|
| 925 | plane_state->visible = false;
|
| 926 | return 0;
|
| 927 | }
|
| 928 |
|
| 929 | if (!crtc_state->enable && !can_update_disabled) {
|
| 930 | drm_dbg_kms(plane_state->plane->dev,
|
| 931 | "Cannot update plane of a disabled CRTC.\n");
|
| 932 | return -EINVAL;
|
| 933 | }
|
| 934 |
|
| 935 | drm_rect_rotate(src, fb->width << 16, fb->height << 16, rotation);
|
| 936 |
|
| 937 |
|
| 938 | hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale);
|
| 939 | vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale);
|
| 940 | if (hscale < 0 || vscale < 0) {
|
| 941 | drm_dbg_kms(plane_state->plane->dev,
|
| 942 | "Invalid scaling of plane\n");
|
| 943 | drm_rect_debug_print("src: ", &plane_state->src, true);
|
| 944 | drm_rect_debug_print("dst: ", &plane_state->dst, false);
|
| 945 | return -ERANGE;
|
| 946 | }
|
| 947 |
|
| 948 | if (crtc_state->enable)
|
| 949 | drm_mode_get_hv_timing(&crtc_state->mode, &clip.x2, &clip.y2);
|
| 950 |
|
| 951 | plane_state->visible = drm_rect_clip_scaled(src, dst, &clip);
|
| 952 |
|
| 953 | drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16, rotation);
|
| 954 |
|
| 955 | if (!plane_state->visible)
|
| 956 | |
| 957 | * Plane isn't visible; some drivers can handle this
|
| 958 | * so we just return success here. Drivers that can't
|
| 959 | * (including those that use the primary plane helper's
|
| 960 | * update function) will return an error from their
|
| 961 | * update_plane handler.
|
| 962 |
|
| 963 | return 0;
|
| 964 |
|
| 965 | if (!can_position && !drm_rect_equals(dst, &clip)) {
|
| 966 | drm_dbg_kms(plane_state->plane->dev,
|
| 967 | "Plane must cover entire CRTC\n");
|
| 968 | drm_rect_debug_print("dst: ", dst, false);
|
| 969 | drm_rect_debug_print("clip: ", &clip, false);
|
| 970 | return -EINVAL;
|
| 971 | }
|
| 972 |
|
| 973 | return 0;
|
| 974 | }
|
| 975 | EXPORT_SYMBOL(drm_atomic_helper_check_plane_state);
|
| 976 |
|
| 977 | |
| 978 | * drm_atomic_helper_check_crtc_primary_plane() - Check CRTC state for primary plane
|
| 979 | * @crtc_state: CRTC state to check
|
| 980 | *
|
| 981 | * Checks that a CRTC has at least one primary plane attached to it, which is
|
| 982 | * a requirement on some hardware. Note that this only involves the CRTC side
|
| 983 | * of the test. To test if the primary plane is visible or if it can be updated
|
| 984 | * without the CRTC being enabled, use drm_atomic_helper_check_plane_state() in
|
| 985 | * the plane's atomic check.
|
| 986 | *
|
| 987 | * RETURNS:
|
| 988 | * 0 if a primary plane is attached to the CRTC, or an error code otherwise
|
| 989 |
|
| 990 | int drm_atomic_helper_check_crtc_primary_plane(struct drm_crtc_state *crtc_state)
|
| 991 | {
|
| 992 | struct drm_crtc *crtc = crtc_state->crtc;
|
| 993 | struct drm_device *dev = crtc->dev;
|
| 994 | struct drm_plane *plane;
|
| 995 |
|
| 996 |
|
| 997 | drm_for_each_plane_mask(plane, dev, crtc_state->plane_mask) {
|
| 998 | if (plane->type == DRM_PLANE_TYPE_PRIMARY)
|
| 999 | return 0;
|
| 1000 | }
|
| 1001 |
|
| 1002 | drm_dbg_atomic(dev, "[CRTC:%d:%s] primary plane missing\n", crtc->base.id, crtc->name);
|
| 1003 |
|
| 1004 | return -EINVAL;
|
| 1005 | }
|
| 1006 | EXPORT_SYMBOL(drm_atomic_helper_check_crtc_primary_plane);
|
| 1007 |
|
| 1008 | |
| 1009 | * drm_atomic_helper_check_planes - validate state object for planes changes
|
| 1010 | * @dev: DRM device
|
| 1011 | * @state: the driver state object
|
| 1012 | *
|
| 1013 | * Check the state object to see if the requested state is physically possible.
|
| 1014 | * This does all the plane update related checks using by calling into the
|
| 1015 | * &drm_crtc_helper_funcs.atomic_check and &drm_plane_helper_funcs.atomic_check
|
| 1016 | * hooks provided by the driver.
|
| 1017 | *
|
| 1018 | * It also sets &drm_crtc_state.planes_changed to indicate that a CRTC has
|
| 1019 | * updated planes.
|
| 1020 | *
|
| 1021 | * RETURNS:
|
| 1022 | * Zero for success or -errno
|
| 1023 |
|
| 1024 | int
|
| 1025 | drm_atomic_helper_check_planes(struct drm_device *dev,
|
| 1026 | struct drm_atomic_commit *state)
|
| 1027 | {
|
| 1028 | struct drm_crtc *crtc;
|
| 1029 | struct drm_crtc_state *new_crtc_state;
|
| 1030 | struct drm_plane *plane;
|
| 1031 | struct drm_plane_state *new_plane_state, *old_plane_state;
|
| 1032 | int i, ret = 0;
|
| 1033 |
|
| 1034 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
|
| 1035 | const struct drm_plane_helper_funcs *funcs;
|
| 1036 |
|
| 1037 | WARN_ON(!drm_modeset_is_locked(&plane->mutex));
|
| 1038 |
|
| 1039 | funcs = plane->helper_private;
|
| 1040 |
|
| 1041 | drm_atomic_helper_plane_changed(state, old_plane_state, new_plane_state, plane);
|
| 1042 |
|
| 1043 | drm_atomic_helper_check_plane_damage(state, new_plane_state);
|
| 1044 |
|
| 1045 | if (!funcs || !funcs->atomic_check)
|
| 1046 | continue;
|
| 1047 |
|
| 1048 | ret = funcs->atomic_check(plane, state);
|
| 1049 | if (ret) {
|
| 1050 | drm_dbg_atomic(plane->dev,
|
| 1051 | "[PLANE:%d:%s] atomic driver check failed\n",
|
| 1052 | plane->base.id, plane->name);
|
| 1053 | return ret;
|
| 1054 | }
|
| 1055 | }
|
| 1056 |
|
| 1057 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
|
| 1058 | const struct drm_crtc_helper_funcs *funcs;
|
| 1059 |
|
| 1060 | funcs = crtc->helper_private;
|
| 1061 |
|
| 1062 | if (!funcs || !funcs->atomic_check)
|
| 1063 | continue;
|
| 1064 |
|
| 1065 | ret = funcs->atomic_check(crtc, state);
|
| 1066 | if (ret) {
|
| 1067 | drm_dbg_atomic(crtc->dev,
|
| 1068 | "[CRTC:%d:%s] atomic driver check failed\n",
|
| 1069 | crtc->base.id, crtc->name);
|
| 1070 | return ret;
|
| 1071 | }
|
| 1072 | }
|
| 1073 |
|
| 1074 | return ret;
|
| 1075 | }
|
| 1076 | EXPORT_SYMBOL(drm_atomic_helper_check_planes);
|
| 1077 |
|
| 1078 | |
| 1079 | * drm_atomic_helper_check - validate state object
|
| 1080 | * @dev: DRM device
|
| 1081 | * @state: the driver state object
|
| 1082 | *
|
| 1083 | * Check the state object to see if the requested state is physically possible.
|
| 1084 | * Only CRTCs and planes have check callbacks, so for any additional (global)
|
| 1085 | * checking that a driver needs it can simply wrap that around this function.
|
| 1086 | * Drivers without such needs can directly use this as their
|
| 1087 | * &drm_mode_config_funcs.atomic_check callback.
|
| 1088 | *
|
| 1089 | * This just wraps the two parts of the state checking for planes and modeset
|
| 1090 | * state in the default order: First it calls drm_atomic_helper_check_modeset()
|
| 1091 | * and then drm_atomic_helper_check_planes(). The assumption is that the
|
| 1092 | * @drm_plane_helper_funcs.atomic_check and @drm_crtc_helper_funcs.atomic_check
|
| 1093 | * functions depend upon an updated adjusted_mode.clock to e.g. properly compute
|
| 1094 | * watermarks.
|
| 1095 | *
|
| 1096 | * Note that zpos normalization will add all enable planes to the state which
|
| 1097 | * might not desired for some drivers.
|
| 1098 | * For example enable/disable of a cursor plane which have fixed zpos value
|
| 1099 | * would trigger all other enabled planes to be forced to the state change.
|
| 1100 | *
|
| 1101 | * IMPORTANT:
|
| 1102 | *
|
| 1103 | * As this function calls drm_atomic_helper_check_modeset() internally, its
|
| 1104 | * restrictions also apply:
|
| 1105 | * Drivers which set &drm_crtc_state.mode_changed (e.g. in their
|
| 1106 | * &drm_plane_helper_funcs.atomic_check hooks if a plane update can't be done
|
| 1107 | * without a full modeset) _must_ call drm_atomic_helper_check_modeset()
|
| 1108 | * function again after that change.
|
| 1109 | *
|
| 1110 | * RETURNS:
|
| 1111 | * Zero for success or -errno
|
| 1112 |
|
| 1113 | int drm_atomic_helper_check(struct drm_device *dev,
|
| 1114 | struct drm_atomic_commit *state)
|
| 1115 | {
|
| 1116 | int ret;
|
| 1117 |
|
| 1118 | ret = drm_atomic_helper_check_modeset(dev, state);
|
| 1119 | if (ret)
|
| 1120 | return ret;
|
| 1121 |
|
| 1122 | if (dev->mode_config.normalize_zpos) {
|
| 1123 | ret = drm_atomic_normalize_zpos(dev, state);
|
| 1124 | if (ret)
|
| 1125 | return ret;
|
| 1126 | }
|
| 1127 |
|
| 1128 | ret = drm_atomic_helper_check_planes(dev, state);
|
| 1129 | if (ret)
|
| 1130 | return ret;
|
| 1131 |
|
| 1132 | if (state->legacy_cursor_update)
|
| 1133 | state->async_update = !drm_atomic_helper_async_check(dev, state);
|
| 1134 |
|
| 1135 | drm_self_refresh_helper_alter_state(state);
|
| 1136 |
|
| 1137 | return ret;
|
| 1138 | }
|
| 1139 | EXPORT_SYMBOL(drm_atomic_helper_check);
|
| 1140 |
|
| 1141 | static bool
|
| 1142 | crtc_needs_disable(struct drm_crtc_state *old_state,
|
| 1143 | struct drm_crtc_state *new_state)
|
| 1144 | {
|
| 1145 | |
| 1146 | * No new_state means the CRTC is off, so the only criteria is whether
|
| 1147 | * it's currently active or in self refresh mode.
|
| 1148 |
|
| 1149 | if (!new_state)
|
| 1150 | return drm_atomic_crtc_effectively_active(old_state);
|
| 1151 |
|
| 1152 | |
| 1153 | * We need to disable bridge(s) and CRTC if we're transitioning out of
|
| 1154 | * self-refresh and changing CRTCs at the same time, because the
|
| 1155 | * bridge tracks self-refresh status via CRTC state.
|
| 1156 |
|
| 1157 | if (old_state->self_refresh_active &&
|
| 1158 | old_state->crtc != new_state->crtc)
|
| 1159 | return true;
|
| 1160 |
|
| 1161 | |
| 1162 | * We also need to run through the crtc_funcs->disable() function if
|
| 1163 | * the CRTC is currently on, if it's transitioning to self refresh
|
| 1164 | * mode, or if it's in self refresh mode and needs to be fully
|
| 1165 | * disabled.
|
| 1166 |
|
| 1167 | return old_state->active ||
|
| 1168 | (old_state->self_refresh_active && !new_state->active) ||
|
| 1169 | new_state->self_refresh_active;
|
| 1170 | }
|
| 1171 |
|
| 1172 | |
| 1173 | * drm_atomic_helper_commit_encoder_bridge_disable - disable bridges and encoder
|
| 1174 | * @dev: DRM device
|
| 1175 | * @state: the driver state object
|
| 1176 | *
|
| 1177 | * Loops over all connectors in the current state and if the CRTC needs
|
| 1178 | * it, disables the bridge chain all the way, then disables the encoder
|
| 1179 | * afterwards.
|
| 1180 |
|
| 1181 | void
|
| 1182 | drm_atomic_helper_commit_encoder_bridge_disable(struct drm_device *dev,
|
| 1183 | struct drm_atomic_commit *state)
|
| 1184 | {
|
| 1185 | struct drm_connector *connector;
|
| 1186 | struct drm_connector_state *old_conn_state, *new_conn_state;
|
| 1187 | struct drm_crtc_state *old_crtc_state, *new_crtc_state;
|
| 1188 | int i;
|
| 1189 |
|
| 1190 | for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) {
|
| 1191 | const struct drm_encoder_helper_funcs *funcs;
|
| 1192 | struct drm_encoder *encoder;
|
| 1193 | struct drm_bridge *bridge;
|
| 1194 |
|
| 1195 | |
| 1196 | * Shut down everything that's in the changeset and currently
|
| 1197 | * still on. So need to check the old, saved state.
|
| 1198 |
|
| 1199 | if (!old_conn_state->crtc)
|
| 1200 | continue;
|
| 1201 |
|
| 1202 | old_crtc_state = drm_atomic_get_old_crtc_state(state, old_conn_state->crtc);
|
| 1203 |
|
| 1204 | if (new_conn_state->crtc)
|
| 1205 | new_crtc_state = drm_atomic_get_new_crtc_state(
|
| 1206 | state,
|
| 1207 | new_conn_state->crtc);
|
| 1208 | else
|
| 1209 | new_crtc_state = NULL;
|
| 1210 |
|
| 1211 | if (!crtc_needs_disable(old_crtc_state, new_crtc_state) ||
|
| 1212 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state))
|
| 1213 | continue;
|
| 1214 |
|
| 1215 | encoder = old_conn_state->best_encoder;
|
| 1216 |
|
| 1217 | |
| 1218 | * an encoder.. but WARN_ON() rather than explode.
|
| 1219 |
|
| 1220 | if (WARN_ON(!encoder))
|
| 1221 | continue;
|
| 1222 |
|
| 1223 | funcs = encoder->helper_private;
|
| 1224 |
|
| 1225 | drm_dbg_atomic(dev, "disabling [ENCODER:%d:%s]\n",
|
| 1226 | encoder->base.id, encoder->name);
|
| 1227 |
|
| 1228 | |
| 1229 | * Each encoder has at most one connector (since we always steal
|
| 1230 | * it away), so we won't call disable hooks twice.
|
| 1231 |
|
| 1232 | bridge = drm_bridge_chain_get_first_bridge(encoder);
|
| 1233 | drm_atomic_bridge_chain_disable(bridge, state);
|
| 1234 | drm_bridge_put(bridge);
|
| 1235 |
|
| 1236 |
|
| 1237 | if (funcs) {
|
| 1238 | if (funcs->atomic_disable)
|
| 1239 | funcs->atomic_disable(encoder, state);
|
| 1240 | else if (new_conn_state->crtc && funcs->prepare)
|
| 1241 | funcs->prepare(encoder);
|
| 1242 | else if (funcs->disable)
|
| 1243 | funcs->disable(encoder);
|
| 1244 | else if (funcs->dpms)
|
| 1245 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
|
| 1246 | }
|
| 1247 | }
|
| 1248 | }
|
| 1249 | EXPORT_SYMBOL(drm_atomic_helper_commit_encoder_bridge_disable);
|
| 1250 |
|
| 1251 | |
| 1252 | * drm_atomic_helper_commit_crtc_disable - disable CRTSs
|
| 1253 | * @dev: DRM device
|
| 1254 | * @state: the driver state object
|
| 1255 | *
|
| 1256 | * Loops over all CRTCs in the current state and if the CRTC needs
|
| 1257 | * it, disables it.
|
| 1258 |
|
| 1259 | void
|
| 1260 | drm_atomic_helper_commit_crtc_disable(struct drm_device *dev, struct drm_atomic_commit *state)
|
| 1261 | {
|
| 1262 | struct drm_crtc *crtc;
|
| 1263 | struct drm_crtc_state *old_crtc_state, *new_crtc_state;
|
| 1264 | int i;
|
| 1265 |
|
| 1266 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
|
| 1267 | const struct drm_crtc_helper_funcs *funcs;
|
| 1268 | int ret;
|
| 1269 |
|
| 1270 |
|
| 1271 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
|
| 1272 | continue;
|
| 1273 |
|
| 1274 | if (!crtc_needs_disable(old_crtc_state, new_crtc_state))
|
| 1275 | continue;
|
| 1276 |
|
| 1277 | funcs = crtc->helper_private;
|
| 1278 |
|
| 1279 | drm_dbg_atomic(dev, "disabling [CRTC:%d:%s]\n",
|
| 1280 | crtc->base.id, crtc->name);
|
| 1281 |
|
| 1282 |
|
| 1283 |
|
| 1284 | if (new_crtc_state->enable && funcs->prepare)
|
| 1285 | funcs->prepare(crtc);
|
| 1286 | else if (funcs->atomic_disable)
|
| 1287 | funcs->atomic_disable(crtc, state);
|
| 1288 | else if (funcs->disable)
|
| 1289 | funcs->disable(crtc);
|
| 1290 | else if (funcs->dpms)
|
| 1291 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
|
| 1292 |
|
| 1293 | if (!drm_dev_has_vblank(dev))
|
| 1294 | continue;
|
| 1295 |
|
| 1296 | ret = drm_crtc_vblank_get(crtc);
|
| 1297 | |
| 1298 | * Self-refresh is not a true "disable"; ensure vblank remains
|
| 1299 | * enabled.
|
| 1300 |
|
| 1301 | if (new_crtc_state->self_refresh_active)
|
| 1302 | WARN_ONCE(ret != 0,
|
| 1303 | "driver disabled vblank in self-refresh\n");
|
| 1304 | else
|
| 1305 | WARN_ONCE(ret != -EINVAL,
|
| 1306 | "driver forgot to call drm_crtc_vblank_off()\n");
|
| 1307 | if (ret == 0)
|
| 1308 | drm_crtc_vblank_put(crtc);
|
| 1309 | }
|
| 1310 | }
|
| 1311 | EXPORT_SYMBOL(drm_atomic_helper_commit_crtc_disable);
|
| 1312 |
|
| 1313 | |
| 1314 | * drm_atomic_helper_commit_encoder_bridge_post_disable - post-disable encoder bridges
|
| 1315 | * @dev: DRM device
|
| 1316 | * @state: the driver state object
|
| 1317 | *
|
| 1318 | * Loops over all connectors in the current state and if the CRTC needs
|
| 1319 | * it, post-disables all encoder bridges.
|
| 1320 |
|
| 1321 | void
|
| 1322 | drm_atomic_helper_commit_encoder_bridge_post_disable(struct drm_device *dev, struct drm_atomic_commit *state)
|
| 1323 | {
|
| 1324 | struct drm_connector *connector;
|
| 1325 | struct drm_connector_state *old_conn_state, *new_conn_state;
|
| 1326 | struct drm_crtc_state *old_crtc_state, *new_crtc_state;
|
| 1327 | int i;
|
| 1328 |
|
| 1329 | for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) {
|
| 1330 | struct drm_encoder *encoder;
|
| 1331 | struct drm_bridge *bridge;
|
| 1332 |
|
| 1333 | |
| 1334 | * Shut down everything that's in the changeset and currently
|
| 1335 | * still on. So need to check the old, saved state.
|
| 1336 |
|
| 1337 | if (!old_conn_state->crtc)
|
| 1338 | continue;
|
| 1339 |
|
| 1340 | old_crtc_state = drm_atomic_get_old_crtc_state(state, old_conn_state->crtc);
|
| 1341 |
|
| 1342 | if (new_conn_state->crtc)
|
| 1343 | new_crtc_state = drm_atomic_get_new_crtc_state(state,
|
| 1344 | new_conn_state->crtc);
|
| 1345 | else
|
| 1346 | new_crtc_state = NULL;
|
| 1347 |
|
| 1348 | if (!crtc_needs_disable(old_crtc_state, new_crtc_state) ||
|
| 1349 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state))
|
| 1350 | continue;
|
| 1351 |
|
| 1352 | encoder = old_conn_state->best_encoder;
|
| 1353 |
|
| 1354 | |
| 1355 | * We shouldn't get this far if we didn't previously have
|
| 1356 | * an encoder.. but WARN_ON() rather than explode.
|
| 1357 |
|
| 1358 | if (WARN_ON(!encoder))
|
| 1359 | continue;
|
| 1360 |
|
| 1361 | drm_dbg_atomic(dev, "post-disabling bridges [ENCODER:%d:%s]\n",
|
| 1362 | encoder->base.id, encoder->name);
|
| 1363 |
|
| 1364 | |
| 1365 | * Each encoder has at most one connector (since we always steal
|
| 1366 | * it away), so we won't call disable hooks twice.
|
| 1367 |
|
| 1368 | bridge = drm_bridge_chain_get_first_bridge(encoder);
|
| 1369 | drm_atomic_bridge_chain_post_disable(bridge, state);
|
| 1370 | drm_bridge_put(bridge);
|
| 1371 | }
|
| 1372 | }
|
| 1373 | EXPORT_SYMBOL(drm_atomic_helper_commit_encoder_bridge_post_disable);
|
| 1374 |
|
| 1375 | static void
|
| 1376 | disable_outputs(struct drm_device *dev, struct drm_atomic_commit *state)
|
| 1377 | {
|
| 1378 | drm_atomic_helper_commit_encoder_bridge_disable(dev, state);
|
| 1379 |
|
| 1380 | drm_atomic_helper_commit_encoder_bridge_post_disable(dev, state);
|
| 1381 |
|
| 1382 | drm_atomic_helper_commit_crtc_disable(dev, state);
|
| 1383 | }
|
| 1384 |
|
| 1385 | |
| 1386 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state
|
| 1387 | * @dev: DRM device
|
| 1388 | * @state: atomic state object being committed
|
| 1389 | *
|
| 1390 | * This function updates all the various legacy modeset state pointers in
|
| 1391 | * connectors, encoders and CRTCs.
|
| 1392 | *
|
| 1393 | * Drivers can use this for building their own atomic commit if they don't have
|
| 1394 | * a pure helper-based modeset implementation.
|
| 1395 | *
|
| 1396 | * Since these updates are not synchronized with lockings, only code paths
|
| 1397 | * called from &drm_mode_config_helper_funcs.atomic_commit_tail can look at the
|
| 1398 | * legacy state filled out by this helper. Defacto this means this helper and
|
| 1399 | * the legacy state pointers are only really useful for transitioning an
|
| 1400 | * existing driver to the atomic world.
|
| 1401 |
|
| 1402 | void
|
| 1403 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
|
| 1404 | struct drm_atomic_commit *state)
|
| 1405 | {
|
| 1406 | struct drm_connector *connector;
|
| 1407 | struct drm_connector_state *old_conn_state, *new_conn_state;
|
| 1408 | struct drm_crtc *crtc;
|
| 1409 | struct drm_crtc_state *new_crtc_state;
|
| 1410 | int i;
|
| 1411 |
|
| 1412 |
|
| 1413 | for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) {
|
| 1414 | if (connector->encoder) {
|
| 1415 | WARN_ON(!connector->encoder->crtc);
|
| 1416 |
|
| 1417 | connector->encoder->crtc = NULL;
|
| 1418 | connector->encoder = NULL;
|
| 1419 | }
|
| 1420 |
|
| 1421 | crtc = new_conn_state->crtc;
|
| 1422 | if ((!crtc && old_conn_state->crtc) ||
|
| 1423 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) {
|
| 1424 | int mode = DRM_MODE_DPMS_OFF;
|
| 1425 |
|
| 1426 | if (crtc && crtc->state->active)
|
| 1427 | mode = DRM_MODE_DPMS_ON;
|
| 1428 |
|
| 1429 | connector->dpms = mode;
|
| 1430 | }
|
| 1431 | }
|
| 1432 |
|
| 1433 |
|
| 1434 | for_each_new_connector_in_state(state, connector, new_conn_state, i) {
|
| 1435 | if (!new_conn_state->crtc)
|
| 1436 | continue;
|
| 1437 |
|
| 1438 | if (WARN_ON(!new_conn_state->best_encoder))
|
| 1439 | continue;
|
| 1440 |
|
| 1441 | connector->encoder = new_conn_state->best_encoder;
|
| 1442 | connector->encoder->crtc = new_conn_state->crtc;
|
| 1443 | }
|
| 1444 |
|
| 1445 |
|
| 1446 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
|
| 1447 | struct drm_plane *primary = crtc->primary;
|
| 1448 | struct drm_plane_state *new_plane_state;
|
| 1449 |
|
| 1450 | crtc->mode = new_crtc_state->mode;
|
| 1451 | crtc->enabled = new_crtc_state->enable;
|
| 1452 |
|
| 1453 | new_plane_state =
|
| 1454 | drm_atomic_get_new_plane_state(state, primary);
|
| 1455 |
|
| 1456 | if (new_plane_state && new_plane_state->crtc == crtc) {
|
| 1457 | crtc->x = new_plane_state->src_x >> 16;
|
| 1458 | crtc->y = new_plane_state->src_y >> 16;
|
| 1459 | }
|
| 1460 | }
|
| 1461 | }
|
| 1462 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state);
|
| 1463 |
|
| 1464 | |
| 1465 | * drm_atomic_helper_calc_timestamping_constants - update vblank timestamping constants
|
| 1466 | * @state: atomic state object
|
| 1467 | *
|
| 1468 | * Updates the timestamping constants used for precise vblank timestamps
|
| 1469 | * by calling drm_calc_timestamping_constants() for all enabled crtcs in @state.
|
| 1470 |
|
| 1471 | void drm_atomic_helper_calc_timestamping_constants(struct drm_atomic_commit *state)
|
| 1472 | {
|
| 1473 | struct drm_crtc_state *new_crtc_state;
|
| 1474 | struct drm_crtc *crtc;
|
| 1475 | int i;
|
| 1476 |
|
| 1477 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
|
| 1478 | if (new_crtc_state->enable)
|
| 1479 | drm_calc_timestamping_constants(crtc,
|
| 1480 | &new_crtc_state->adjusted_mode);
|
| 1481 | }
|
| 1482 | }
|
| 1483 | EXPORT_SYMBOL(drm_atomic_helper_calc_timestamping_constants);
|
| 1484 |
|
| 1485 | |
| 1486 | * drm_atomic_helper_commit_crtc_set_mode - set the new mode
|
| 1487 | * @dev: DRM device
|
| 1488 | * @state: the driver state object
|
| 1489 | *
|
| 1490 | * Loops over all connectors in the current state and if the mode has
|
| 1491 | * changed, change the mode of the CRTC, then call down the bridge
|
| 1492 | * chain and change the mode in all bridges as well.
|
| 1493 |
|
| 1494 | void
|
| 1495 | drm_atomic_helper_commit_crtc_set_mode(struct drm_device *dev, struct drm_atomic_commit *state)
|
| 1496 | {
|
| 1497 | struct drm_crtc *crtc;
|
| 1498 | struct drm_crtc_state *new_crtc_state;
|
| 1499 | struct drm_connector *connector;
|
| 1500 | struct drm_connector_state *new_conn_state;
|
| 1501 | int i;
|
| 1502 |
|
| 1503 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
|
| 1504 | const struct drm_crtc_helper_funcs *funcs;
|
| 1505 |
|
| 1506 | if (!new_crtc_state->mode_changed)
|
| 1507 | continue;
|
| 1508 |
|
| 1509 | funcs = crtc->helper_private;
|
| 1510 |
|
| 1511 | if (new_crtc_state->enable && funcs->mode_set_nofb) {
|
| 1512 | drm_dbg_atomic(dev, "modeset on [CRTC:%d:%s]\n",
|
| 1513 | crtc->base.id, crtc->name);
|
| 1514 |
|
| 1515 | funcs->mode_set_nofb(crtc);
|
| 1516 | }
|
| 1517 | }
|
| 1518 |
|
| 1519 | for_each_new_connector_in_state(state, connector, new_conn_state, i) {
|
| 1520 | const struct drm_encoder_helper_funcs *funcs;
|
| 1521 | struct drm_encoder *encoder;
|
| 1522 | struct drm_display_mode *mode, *adjusted_mode;
|
| 1523 | struct drm_bridge *bridge;
|
| 1524 |
|
| 1525 | if (!new_conn_state->best_encoder)
|
| 1526 | continue;
|
| 1527 |
|
| 1528 | encoder = new_conn_state->best_encoder;
|
| 1529 | funcs = encoder->helper_private;
|
| 1530 | new_crtc_state = new_conn_state->crtc->state;
|
| 1531 | mode = &new_crtc_state->mode;
|
| 1532 | adjusted_mode = &new_crtc_state->adjusted_mode;
|
| 1533 |
|
| 1534 | if (!new_crtc_state->mode_changed && !new_crtc_state->connectors_changed)
|
| 1535 | continue;
|
| 1536 |
|
| 1537 | drm_dbg_atomic(dev, "modeset on [ENCODER:%d:%s]\n",
|
| 1538 | encoder->base.id, encoder->name);
|
| 1539 |
|
| 1540 | |
| 1541 | * Each encoder has at most one connector (since we always steal
|
| 1542 | * it away), so we won't call mode_set hooks twice.
|
| 1543 |
|
| 1544 | if (funcs && funcs->atomic_mode_set) {
|
| 1545 | funcs->atomic_mode_set(encoder, new_crtc_state,
|
| 1546 | new_conn_state);
|
| 1547 | } else if (funcs && funcs->mode_set) {
|
| 1548 | funcs->mode_set(encoder, mode, adjusted_mode);
|
| 1549 | }
|
| 1550 |
|
| 1551 | bridge = drm_bridge_chain_get_first_bridge(encoder);
|
| 1552 | drm_bridge_chain_mode_set(bridge, mode, adjusted_mode);
|
| 1553 | drm_bridge_put(bridge);
|
| 1554 | }
|
| 1555 | }
|
| 1556 | EXPORT_SYMBOL(drm_atomic_helper_commit_crtc_set_mode);
|
| 1557 |
|
| 1558 | |
| 1559 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs
|
| 1560 | * @dev: DRM device
|
| 1561 | * @state: atomic state object being committed
|
| 1562 | *
|
| 1563 | * This function shuts down all the outputs that need to be shut down and
|
| 1564 | * prepares them (if required) with the new mode.
|
| 1565 | *
|
| 1566 | * For compatibility with legacy CRTC helpers this should be called before
|
| 1567 | * drm_atomic_helper_commit_planes(), which is what the default commit function
|
| 1568 | * does. But drivers with different needs can group the modeset commits together
|
| 1569 | * and do the plane commits at the end. This is useful for drivers doing runtime
|
| 1570 | * PM since planes updates then only happen when the CRTC is actually enabled.
|
| 1571 |
|
| 1572 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
|
| 1573 | struct drm_atomic_commit *state)
|
| 1574 | {
|
| 1575 | disable_outputs(dev, state);
|
| 1576 |
|
| 1577 | drm_atomic_helper_update_legacy_modeset_state(dev, state);
|
| 1578 | drm_atomic_helper_calc_timestamping_constants(state);
|
| 1579 |
|
| 1580 | drm_atomic_helper_commit_crtc_set_mode(dev, state);
|
| 1581 | }
|
| 1582 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables);
|
| 1583 |
|
| 1584 | |
| 1585 | * drm_atomic_helper_commit_writebacks - issue writebacks
|
| 1586 | * @dev: DRM device
|
| 1587 | * @state: atomic state object being committed
|
| 1588 | *
|
| 1589 | * This loops over the connectors, checks if the new state requires
|
| 1590 | * a writeback job to be issued and in that case issues an atomic
|
| 1591 | * commit on each connector.
|
| 1592 |
|
| 1593 | void drm_atomic_helper_commit_writebacks(struct drm_device *dev,
|
| 1594 | struct drm_atomic_commit *state)
|
| 1595 | {
|
| 1596 | struct drm_connector *connector;
|
| 1597 | struct drm_connector_state *new_conn_state;
|
| 1598 | int i;
|
| 1599 |
|
| 1600 | for_each_new_connector_in_state(state, connector, new_conn_state, i) {
|
| 1601 | const struct drm_connector_helper_funcs *funcs;
|
| 1602 |
|
| 1603 | funcs = connector->helper_private;
|
| 1604 | if (!funcs->atomic_commit)
|
| 1605 | continue;
|
| 1606 |
|
| 1607 | if (new_conn_state->writeback_job && new_conn_state->writeback_job->fb) {
|
| 1608 | WARN_ON(connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK);
|
| 1609 | funcs->atomic_commit(connector, state);
|
| 1610 | }
|
| 1611 | }
|
| 1612 | }
|
| 1613 | EXPORT_SYMBOL(drm_atomic_helper_commit_writebacks);
|
| 1614 |
|
| 1615 | |
| 1616 | * drm_atomic_helper_commit_encoder_bridge_pre_enable - pre-enable bridges
|
| 1617 | * @dev: DRM device
|
| 1618 | * @state: atomic state object being committed
|
| 1619 | *
|
| 1620 | * This loops over the connectors and if the CRTC needs it, pre-enables
|
| 1621 | * the entire bridge chain.
|
| 1622 |
|
| 1623 | void
|
| 1624 | drm_atomic_helper_commit_encoder_bridge_pre_enable(struct drm_device *dev, struct drm_atomic_commit *state)
|
| 1625 | {
|
| 1626 | struct drm_connector *connector;
|
| 1627 | struct drm_connector_state *new_conn_state;
|
| 1628 | int i;
|
| 1629 |
|
| 1630 | for_each_new_connector_in_state(state, connector, new_conn_state, i) {
|
| 1631 | struct drm_encoder *encoder;
|
| 1632 | struct drm_bridge *bridge;
|
| 1633 |
|
| 1634 | if (!new_conn_state->best_encoder)
|
| 1635 | continue;
|
| 1636 |
|
| 1637 | if (!new_conn_state->crtc->state->active ||
|
| 1638 | !drm_atomic_crtc_needs_modeset(new_conn_state->crtc->state))
|
| 1639 | continue;
|
| 1640 |
|
| 1641 | encoder = new_conn_state->best_encoder;
|
| 1642 |
|
| 1643 | drm_dbg_atomic(dev, "pre-enabling bridges [ENCODER:%d:%s]\n",
|
| 1644 | encoder->base.id, encoder->name);
|
| 1645 |
|
| 1646 | |
| 1647 | * Each encoder has at most one connector (since we always steal
|
| 1648 | * it away), so we won't call enable hooks twice.
|
| 1649 |
|
| 1650 | bridge = drm_bridge_chain_get_first_bridge(encoder);
|
| 1651 | drm_atomic_bridge_chain_pre_enable(bridge, state);
|
| 1652 | drm_bridge_put(bridge);
|
| 1653 | }
|
| 1654 | }
|
| 1655 | EXPORT_SYMBOL(drm_atomic_helper_commit_encoder_bridge_pre_enable);
|
| 1656 |
|
| 1657 | |
| 1658 | * drm_atomic_helper_commit_crtc_enable - enables the CRTCs
|
| 1659 | * @dev: DRM device
|
| 1660 | * @state: atomic state object being committed
|
| 1661 | *
|
| 1662 | * This loops over CRTCs in the new state, and of the CRTC needs
|
| 1663 | * it, enables it.
|
| 1664 |
|
| 1665 | void
|
| 1666 | drm_atomic_helper_commit_crtc_enable(struct drm_device *dev, struct drm_atomic_commit *state)
|
| 1667 | {
|
| 1668 | struct drm_crtc *crtc;
|
| 1669 | struct drm_crtc_state *old_crtc_state;
|
| 1670 | struct drm_crtc_state *new_crtc_state;
|
| 1671 | int i;
|
| 1672 |
|
| 1673 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
|
| 1674 | const struct drm_crtc_helper_funcs *funcs;
|
| 1675 |
|
| 1676 |
|
| 1677 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
|
| 1678 | continue;
|
| 1679 |
|
| 1680 | if (!new_crtc_state->active)
|
| 1681 | continue;
|
| 1682 |
|
| 1683 | funcs = crtc->helper_private;
|
| 1684 |
|
| 1685 | if (new_crtc_state->enable) {
|
| 1686 | drm_dbg_atomic(dev, "enabling [CRTC:%d:%s]\n",
|
| 1687 | crtc->base.id, crtc->name);
|
| 1688 | if (funcs->atomic_enable)
|
| 1689 | funcs->atomic_enable(crtc, state);
|
| 1690 | else if (funcs->commit)
|
| 1691 | funcs->commit(crtc);
|
| 1692 | }
|
| 1693 | }
|
| 1694 | }
|
| 1695 | EXPORT_SYMBOL(drm_atomic_helper_commit_crtc_enable);
|
| 1696 |
|
| 1697 | |
| 1698 | * drm_atomic_helper_commit_encoder_bridge_enable - enables the bridges
|
| 1699 | * @dev: DRM device
|
| 1700 | * @state: atomic state object being committed
|
| 1701 | *
|
| 1702 | * This loops over all connectors in the new state, and of the CRTC needs
|
| 1703 | * it, enables the entire bridge chain.
|
| 1704 |
|
| 1705 | void
|
| 1706 | drm_atomic_helper_commit_encoder_bridge_enable(struct drm_device *dev, struct drm_atomic_commit *state)
|
| 1707 | {
|
| 1708 | struct drm_connector *connector;
|
| 1709 | struct drm_connector_state *new_conn_state;
|
| 1710 | int i;
|
| 1711 |
|
| 1712 | for_each_new_connector_in_state(state, connector, new_conn_state, i) {
|
| 1713 | const struct drm_encoder_helper_funcs *funcs;
|
| 1714 | struct drm_encoder *encoder;
|
| 1715 | struct drm_bridge *bridge;
|
| 1716 |
|
| 1717 | if (!new_conn_state->best_encoder)
|
| 1718 | continue;
|
| 1719 |
|
| 1720 | if (!new_conn_state->crtc->state->active ||
|
| 1721 | !drm_atomic_crtc_needs_modeset(new_conn_state->crtc->state))
|
| 1722 | continue;
|
| 1723 |
|
| 1724 | encoder = new_conn_state->best_encoder;
|
| 1725 | funcs = encoder->helper_private;
|
| 1726 |
|
| 1727 | drm_dbg_atomic(dev, "enabling [ENCODER:%d:%s]\n",
|
| 1728 | encoder->base.id, encoder->name);
|
| 1729 |
|
| 1730 | |
| 1731 | * Each encoder has at most one connector (since we always steal
|
| 1732 | * it away), so we won't call enable hooks twice.
|
| 1733 |
|
| 1734 | bridge = drm_bridge_chain_get_first_bridge(encoder);
|
| 1735 |
|
| 1736 | if (funcs) {
|
| 1737 | if (funcs->atomic_enable)
|
| 1738 | funcs->atomic_enable(encoder, state);
|
| 1739 | else if (funcs->enable)
|
| 1740 | funcs->enable(encoder);
|
| 1741 | else if (funcs->commit)
|
| 1742 | funcs->commit(encoder);
|
| 1743 | }
|
| 1744 |
|
| 1745 | drm_atomic_bridge_chain_enable(bridge, state);
|
| 1746 | drm_bridge_put(bridge);
|
| 1747 | }
|
| 1748 | }
|
| 1749 | EXPORT_SYMBOL(drm_atomic_helper_commit_encoder_bridge_enable);
|
| 1750 |
|
| 1751 | |
| 1752 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs
|
| 1753 | * @dev: DRM device
|
| 1754 | * @state: atomic state object being committed
|
| 1755 | *
|
| 1756 | * This function enables all the outputs with the new configuration which had to
|
| 1757 | * be turned off for the update.
|
| 1758 | *
|
| 1759 | * For compatibility with legacy CRTC helpers this should be called after
|
| 1760 | * drm_atomic_helper_commit_planes(), which is what the default commit function
|
| 1761 | * does. But drivers with different needs can group the modeset commits together
|
| 1762 | * and do the plane commits at the end. This is useful for drivers doing runtime
|
| 1763 | * PM since planes updates then only happen when the CRTC is actually enabled.
|
| 1764 |
|
| 1765 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
|
| 1766 | struct drm_atomic_commit *state)
|
| 1767 | {
|
| 1768 | drm_atomic_helper_commit_crtc_enable(dev, state);
|
| 1769 |
|
| 1770 | drm_atomic_helper_commit_encoder_bridge_pre_enable(dev, state);
|
| 1771 |
|
| 1772 | drm_atomic_helper_commit_encoder_bridge_enable(dev, state);
|
| 1773 |
|
| 1774 | drm_atomic_helper_commit_writebacks(dev, state);
|
| 1775 | }
|
| 1776 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables);
|
| 1777 |
|
| 1778 | |
| 1779 | * For atomic updates which touch just a single CRTC, calculate the time of the
|
| 1780 | * next vblank, and inform all the fences of the deadline.
|
| 1781 |
|
| 1782 | static void set_fence_deadline(struct drm_device *dev,
|
| 1783 | struct drm_atomic_commit *state)
|
| 1784 | {
|
| 1785 | struct drm_crtc *crtc;
|
| 1786 | struct drm_crtc_state *new_crtc_state;
|
| 1787 | struct drm_plane *plane;
|
| 1788 | struct drm_plane_state *new_plane_state;
|
| 1789 | ktime_t vbltime = 0;
|
| 1790 | int i;
|
| 1791 |
|
| 1792 | for_each_new_crtc_in_state (state, crtc, new_crtc_state, i) {
|
| 1793 | ktime_t v;
|
| 1794 |
|
| 1795 | if (drm_atomic_crtc_needs_modeset(new_crtc_state))
|
| 1796 | continue;
|
| 1797 |
|
| 1798 | if (!new_crtc_state->active)
|
| 1799 | continue;
|
| 1800 |
|
| 1801 | if (drm_crtc_next_vblank_start(crtc, &v))
|
| 1802 | continue;
|
| 1803 |
|
| 1804 | if (!vbltime || ktime_before(v, vbltime))
|
| 1805 | vbltime = v;
|
| 1806 | }
|
| 1807 |
|
| 1808 |
|
| 1809 | if (!vbltime)
|
| 1810 | return;
|
| 1811 |
|
| 1812 | for_each_new_plane_in_state (state, plane, new_plane_state, i) {
|
| 1813 | if (!new_plane_state->fence)
|
| 1814 | continue;
|
| 1815 | dma_fence_set_deadline(new_plane_state->fence, vbltime);
|
| 1816 | }
|
| 1817 | }
|
| 1818 |
|
| 1819 | |
| 1820 | * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state
|
| 1821 | * @dev: DRM device
|
| 1822 | * @state: atomic state object with old state structures
|
| 1823 | * @pre_swap: If true, do an interruptible wait, and @state is the new state.
|
| 1824 | * Otherwise @state is the old state.
|
| 1825 | *
|
| 1826 | * For implicit sync, driver should fish the exclusive fence out from the
|
| 1827 | * incoming fb's and stash it in the drm_plane_state. This is called after
|
| 1828 | * drm_atomic_helper_swap_state() so it uses the current plane state (and
|
| 1829 | * just uses the atomic state to find the changed planes)
|
| 1830 | *
|
| 1831 | * Note that @pre_swap is needed since the point where we block for fences moves
|
| 1832 | * around depending upon whether an atomic commit is blocking or
|
| 1833 | * non-blocking. For non-blocking commit all waiting needs to happen after
|
| 1834 | * drm_atomic_helper_swap_state() is called, but for blocking commits we want
|
| 1835 | * to wait **before** we do anything that can't be easily rolled back. That is
|
| 1836 | * before we call drm_atomic_helper_swap_state().
|
| 1837 | *
|
| 1838 | * Returns zero if success or < 0 if dma_fence_wait() fails.
|
| 1839 |
|
| 1840 | int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
|
| 1841 | struct drm_atomic_commit *state,
|
| 1842 | bool pre_swap)
|
| 1843 | {
|
| 1844 | struct drm_plane *plane;
|
| 1845 | struct drm_plane_state *new_plane_state;
|
| 1846 | int i, ret;
|
| 1847 |
|
| 1848 | set_fence_deadline(dev, state);
|
| 1849 |
|
| 1850 | for_each_new_plane_in_state(state, plane, new_plane_state, i) {
|
| 1851 | if (!new_plane_state->fence)
|
| 1852 | continue;
|
| 1853 |
|
| 1854 | WARN_ON(!new_plane_state->fb);
|
| 1855 |
|
| 1856 | |
| 1857 | * If waiting for fences pre-swap (ie: nonblock), userspace can
|
| 1858 | * still interrupt the operation. Instead of blocking until the
|
| 1859 | * timer expires, make the wait interruptible.
|
| 1860 |
|
| 1861 | ret = dma_fence_wait(new_plane_state->fence, pre_swap);
|
| 1862 | if (ret)
|
| 1863 | return ret;
|
| 1864 |
|
| 1865 | dma_fence_put(new_plane_state->fence);
|
| 1866 | new_plane_state->fence = NULL;
|
| 1867 | }
|
| 1868 |
|
| 1869 | return 0;
|
| 1870 | }
|
| 1871 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences);
|
| 1872 |
|
| 1873 | |
| 1874 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on CRTCs
|
| 1875 | * @dev: DRM device
|
| 1876 | * @state: atomic state object being committed
|
| 1877 | *
|
| 1878 | * Helper to, after atomic commit, wait for vblanks on all affected
|
| 1879 | * CRTCs (ie. before cleaning up old framebuffers using
|
| 1880 | * drm_atomic_helper_cleanup_planes()). It will only wait on CRTCs where the
|
| 1881 | * framebuffers have actually changed to optimize for the legacy cursor and
|
| 1882 | * plane update use-case.
|
| 1883 | *
|
| 1884 | * Drivers using the nonblocking commit tracking support initialized by calling
|
| 1885 | * drm_atomic_helper_setup_commit() should look at
|
| 1886 | * drm_atomic_helper_wait_for_flip_done() as an alternative.
|
| 1887 |
|
| 1888 | void
|
| 1889 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
|
| 1890 | struct drm_atomic_commit *state)
|
| 1891 | {
|
| 1892 | struct drm_crtc *crtc;
|
| 1893 | struct drm_crtc_state *old_crtc_state, *new_crtc_state;
|
| 1894 | int i, ret;
|
| 1895 | unsigned int crtc_mask = 0;
|
| 1896 |
|
| 1897 | |
| 1898 | * Legacy cursor ioctls are completely unsynced, and userspace
|
| 1899 | * relies on that (by doing tons of cursor updates).
|
| 1900 |
|
| 1901 | if (state->legacy_cursor_update)
|
| 1902 | return;
|
| 1903 |
|
| 1904 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
|
| 1905 | if (!new_crtc_state->active)
|
| 1906 | continue;
|
| 1907 |
|
| 1908 | ret = drm_crtc_vblank_get(crtc);
|
| 1909 | if (ret != 0)
|
| 1910 | continue;
|
| 1911 |
|
| 1912 | crtc_mask |= drm_crtc_mask(crtc);
|
| 1913 | state->crtcs[i].last_vblank_count = drm_crtc_vblank_count(crtc);
|
| 1914 | }
|
| 1915 |
|
| 1916 | for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) {
|
| 1917 | wait_queue_head_t *queue = drm_crtc_vblank_waitqueue(crtc);
|
| 1918 |
|
| 1919 | if (!(crtc_mask & drm_crtc_mask(crtc)))
|
| 1920 | continue;
|
| 1921 |
|
| 1922 | ret = wait_event_timeout(*queue,
|
| 1923 | state->crtcs[i].last_vblank_count !=
|
| 1924 | drm_crtc_vblank_count(crtc),
|
| 1925 | msecs_to_jiffies(1000));
|
| 1926 |
|
| 1927 | WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n",
|
| 1928 | crtc->base.id, crtc->name);
|
| 1929 |
|
| 1930 | drm_crtc_vblank_put(crtc);
|
| 1931 | }
|
| 1932 | }
|
| 1933 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks);
|
| 1934 |
|
| 1935 | |
| 1936 | * drm_atomic_helper_wait_for_flip_done - wait for all page flips to be done
|
| 1937 | * @dev: DRM device
|
| 1938 | * @state: atomic state object being committed
|
| 1939 | *
|
| 1940 | * Helper to, after atomic commit, wait for page flips on all affected
|
| 1941 | * crtcs (ie. before cleaning up old framebuffers using
|
| 1942 | * drm_atomic_helper_cleanup_planes()). Compared to
|
| 1943 | * drm_atomic_helper_wait_for_vblanks() this waits for the completion on all
|
| 1944 | * CRTCs, assuming that cursors-only updates are signalling their completion
|
| 1945 | * immediately (or using a different path).
|
| 1946 | *
|
| 1947 | * This requires that drivers use the nonblocking commit tracking support
|
| 1948 | * initialized using drm_atomic_helper_setup_commit().
|
| 1949 |
|
| 1950 | void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
|
| 1951 | struct drm_atomic_commit *state)
|
| 1952 | {
|
| 1953 | struct drm_crtc *crtc;
|
| 1954 | int i;
|
| 1955 |
|
| 1956 | for (i = 0; i < dev->mode_config.num_crtc; i++) {
|
| 1957 | struct drm_crtc_commit *commit = state->crtcs[i].commit;
|
| 1958 | int ret;
|
| 1959 |
|
| 1960 | crtc = state->crtcs[i].ptr;
|
| 1961 |
|
| 1962 | if (!crtc || !commit)
|
| 1963 | continue;
|
| 1964 |
|
| 1965 | ret = wait_for_completion_timeout(&commit->flip_done, 10 * HZ);
|
| 1966 | if (ret == 0)
|
| 1967 | drm_err(dev, "[CRTC:%d:%s] flip_done timed out\n",
|
| 1968 | crtc->base.id, crtc->name);
|
| 1969 | }
|
| 1970 |
|
| 1971 | if (state->fake_commit)
|
| 1972 | complete_all(&state->fake_commit->flip_done);
|
| 1973 | }
|
| 1974 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_flip_done);
|
| 1975 |
|
| 1976 | |
| 1977 | * drm_atomic_helper_commit_tail - commit atomic update to hardware
|
| 1978 | * @state: atomic state object being committed
|
| 1979 | *
|
| 1980 | * This is the default implementation for the
|
| 1981 | * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers
|
| 1982 | * that do not support runtime_pm or do not need the CRTC to be
|
| 1983 | * enabled to perform a commit. Otherwise, see
|
| 1984 | * drm_atomic_helper_commit_tail_rpm().
|
| 1985 | *
|
| 1986 | * Note that the default ordering of how the various stages are called is to
|
| 1987 | * match the legacy modeset helper library closest.
|
| 1988 |
|
| 1989 | void drm_atomic_helper_commit_tail(struct drm_atomic_commit *state)
|
| 1990 | {
|
| 1991 | struct drm_device *dev = state->dev;
|
| 1992 |
|
| 1993 | drm_atomic_helper_commit_modeset_disables(dev, state);
|
| 1994 |
|
| 1995 | drm_atomic_helper_commit_planes(dev, state, 0);
|
| 1996 |
|
| 1997 | drm_atomic_helper_commit_modeset_enables(dev, state);
|
| 1998 |
|
| 1999 | drm_atomic_helper_fake_vblank(state);
|
| 2000 |
|
| 2001 | drm_atomic_helper_commit_hw_done(state);
|
| 2002 |
|
| 2003 | drm_atomic_helper_wait_for_vblanks(dev, state);
|
| 2004 |
|
| 2005 | drm_atomic_helper_cleanup_planes(dev, state);
|
| 2006 | }
|
| 2007 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail);
|
| 2008 |
|
| 2009 | |
| 2010 | * drm_atomic_helper_commit_tail_rpm - commit atomic update to hardware
|
| 2011 | * @state: new modeset state to be committed
|
| 2012 | *
|
| 2013 | * This is an alternative implementation for the
|
| 2014 | * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers
|
| 2015 | * that support runtime_pm or need the CRTC to be enabled to perform a
|
| 2016 | * commit. Otherwise, one should use the default implementation
|
| 2017 | * drm_atomic_helper_commit_tail().
|
| 2018 |
|
| 2019 | void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_commit *state)
|
| 2020 | {
|
| 2021 | struct drm_device *dev = state->dev;
|
| 2022 |
|
| 2023 | drm_atomic_helper_commit_modeset_disables(dev, state);
|
| 2024 |
|
| 2025 | drm_atomic_helper_commit_modeset_enables(dev, state);
|
| 2026 |
|
| 2027 | drm_atomic_helper_commit_planes(dev, state,
|
| 2028 | DRM_PLANE_COMMIT_ACTIVE_ONLY);
|
| 2029 |
|
| 2030 | drm_atomic_helper_fake_vblank(state);
|
| 2031 |
|
| 2032 | drm_atomic_helper_commit_hw_done(state);
|
| 2033 |
|
| 2034 | drm_atomic_helper_wait_for_vblanks(dev, state);
|
| 2035 |
|
| 2036 | drm_atomic_helper_cleanup_planes(dev, state);
|
| 2037 | }
|
| 2038 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail_rpm);
|
| 2039 |
|
| 2040 | static void commit_tail(struct drm_atomic_commit *state)
|
| 2041 | {
|
| 2042 | struct drm_device *dev = state->dev;
|
| 2043 | const struct drm_mode_config_helper_funcs *funcs;
|
| 2044 | struct drm_crtc_state *new_crtc_state;
|
| 2045 | struct drm_crtc *crtc;
|
| 2046 | ktime_t start;
|
| 2047 | s64 commit_time_ms;
|
| 2048 | unsigned int i, new_self_refresh_mask = 0;
|
| 2049 |
|
| 2050 | funcs = dev->mode_config.helper_private;
|
| 2051 |
|
| 2052 | |
| 2053 | * We're measuring the _entire_ commit, so the time will vary depending
|
| 2054 | * on how many fences and objects are involved. For the purposes of self
|
| 2055 | * refresh, this is desirable since it'll give us an idea of how
|
| 2056 | * congested things are. This will inform our decision on how often we
|
| 2057 | * should enter self refresh after idle.
|
| 2058 | *
|
| 2059 | * These times will be averaged out in the self refresh helpers to avoid
|
| 2060 | * overreacting over one outlier frame
|
| 2061 |
|
| 2062 | start = ktime_get();
|
| 2063 |
|
| 2064 | drm_atomic_helper_wait_for_fences(dev, state, false);
|
| 2065 |
|
| 2066 | drm_atomic_helper_wait_for_dependencies(state);
|
| 2067 |
|
| 2068 | |
| 2069 | * We cannot safely access new_crtc_state after
|
| 2070 | * drm_atomic_helper_commit_hw_done() so figure out which crtc's have
|
| 2071 | * self-refresh active beforehand:
|
| 2072 |
|
| 2073 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i)
|
| 2074 | if (new_crtc_state->self_refresh_active)
|
| 2075 | new_self_refresh_mask |= BIT(i);
|
| 2076 |
|
| 2077 | if (funcs && funcs->atomic_commit_tail)
|
| 2078 | funcs->atomic_commit_tail(state);
|
| 2079 | else
|
| 2080 | drm_atomic_helper_commit_tail(state);
|
| 2081 |
|
| 2082 | commit_time_ms = ktime_ms_delta(ktime_get(), start);
|
| 2083 | if (commit_time_ms > 0)
|
| 2084 | drm_self_refresh_helper_update_avg_times(state,
|
| 2085 | (unsigned long)commit_time_ms,
|
| 2086 | new_self_refresh_mask);
|
| 2087 |
|
| 2088 | drm_atomic_helper_commit_cleanup_done(state);
|
| 2089 |
|
| 2090 | drm_atomic_commit_put(state);
|
| 2091 | }
|
| 2092 |
|
| 2093 | static void commit_work(struct work_struct *work)
|
| 2094 | {
|
| 2095 | struct drm_atomic_commit *state = container_of(work,
|
| 2096 | struct drm_atomic_commit,
|
| 2097 | commit_work);
|
| 2098 | commit_tail(state);
|
| 2099 | }
|
| 2100 |
|
| 2101 | |
| 2102 | * drm_atomic_helper_async_check - check if state can be committed asynchronously
|
| 2103 | * @dev: DRM device
|
| 2104 | * @state: the driver state object
|
| 2105 | *
|
| 2106 | * This helper will check if it is possible to commit the state asynchronously.
|
| 2107 | * Async commits are not supposed to swap the states like normal sync commits
|
| 2108 | * but just do in-place changes on the current state.
|
| 2109 | *
|
| 2110 | * It will return 0 if the commit can happen in an asynchronous fashion or error
|
| 2111 | * if not. Note that error just mean it can't be committed asynchronously, if it
|
| 2112 | * fails the commit should be treated like a normal synchronous commit.
|
| 2113 |
|
| 2114 | int drm_atomic_helper_async_check(struct drm_device *dev,
|
| 2115 | struct drm_atomic_commit *state)
|
| 2116 | {
|
| 2117 | struct drm_crtc *crtc;
|
| 2118 | struct drm_crtc_state *crtc_state;
|
| 2119 | struct drm_plane *plane = NULL;
|
| 2120 | struct drm_plane_state *old_plane_state = NULL;
|
| 2121 | struct drm_plane_state *new_plane_state = NULL;
|
| 2122 | const struct drm_plane_helper_funcs *funcs;
|
| 2123 | int i, ret, n_planes = 0;
|
| 2124 |
|
| 2125 | for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
|
| 2126 | if (drm_atomic_crtc_needs_modeset(crtc_state))
|
| 2127 | return -EINVAL;
|
| 2128 | }
|
| 2129 |
|
| 2130 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i)
|
| 2131 | n_planes++;
|
| 2132 |
|
| 2133 |
|
| 2134 | if (n_planes != 1) {
|
| 2135 | drm_dbg_atomic(dev,
|
| 2136 | "only single plane async updates are supported\n");
|
| 2137 | return -EINVAL;
|
| 2138 | }
|
| 2139 |
|
| 2140 | if (!new_plane_state->crtc ||
|
| 2141 | old_plane_state->crtc != new_plane_state->crtc) {
|
| 2142 | drm_dbg_atomic(dev,
|
| 2143 | "[PLANE:%d:%s] async update cannot change CRTC\n",
|
| 2144 | plane->base.id, plane->name);
|
| 2145 | return -EINVAL;
|
| 2146 | }
|
| 2147 |
|
| 2148 | funcs = plane->helper_private;
|
| 2149 | if (!funcs->atomic_async_update) {
|
| 2150 | drm_dbg_atomic(dev,
|
| 2151 | "[PLANE:%d:%s] driver does not support async updates\n",
|
| 2152 | plane->base.id, plane->name);
|
| 2153 | return -EINVAL;
|
| 2154 | }
|
| 2155 |
|
| 2156 | if (new_plane_state->fence) {
|
| 2157 | drm_dbg_atomic(dev,
|
| 2158 | "[PLANE:%d:%s] missing fence for async update\n",
|
| 2159 | plane->base.id, plane->name);
|
| 2160 | return -EINVAL;
|
| 2161 | }
|
| 2162 |
|
| 2163 | |
| 2164 | * Don't do an async update if there is an outstanding commit modifying
|
| 2165 | * the plane. This prevents our async update's changes from getting
|
| 2166 | * overridden by a previous synchronous update's state.
|
| 2167 |
|
| 2168 | if (old_plane_state->commit &&
|
| 2169 | !try_wait_for_completion(&old_plane_state->commit->hw_done)) {
|
| 2170 | drm_dbg_atomic(dev,
|
| 2171 | "[PLANE:%d:%s] inflight previous commit preventing async commit\n",
|
| 2172 | plane->base.id, plane->name);
|
| 2173 | return -EBUSY;
|
| 2174 | }
|
| 2175 |
|
| 2176 | ret = funcs->atomic_async_check(plane, state, false);
|
| 2177 | if (ret != 0)
|
| 2178 | drm_dbg_atomic(dev,
|
| 2179 | "[PLANE:%d:%s] driver async check failed\n",
|
| 2180 | plane->base.id, plane->name);
|
| 2181 | return ret;
|
| 2182 | }
|
| 2183 | EXPORT_SYMBOL(drm_atomic_helper_async_check);
|
| 2184 |
|
| 2185 | |
| 2186 | * drm_atomic_helper_async_commit - commit state asynchronously
|
| 2187 | * @dev: DRM device
|
| 2188 | * @state: the driver state object
|
| 2189 | *
|
| 2190 | * This function commits a state asynchronously, i.e., not vblank
|
| 2191 | * synchronized. It should be used on a state only when
|
| 2192 | * drm_atomic_async_check() succeeds. Async commits are not supposed to swap
|
| 2193 | * the states like normal sync commits, but just do in-place changes on the
|
| 2194 | * current state.
|
| 2195 | *
|
| 2196 | * TODO: Implement full swap instead of doing in-place changes.
|
| 2197 |
|
| 2198 | void drm_atomic_helper_async_commit(struct drm_device *dev,
|
| 2199 | struct drm_atomic_commit *state)
|
| 2200 | {
|
| 2201 | struct drm_plane *plane;
|
| 2202 | struct drm_plane_state *plane_state;
|
| 2203 | const struct drm_plane_helper_funcs *funcs;
|
| 2204 | int i;
|
| 2205 |
|
| 2206 | for_each_new_plane_in_state(state, plane, plane_state, i) {
|
| 2207 | struct drm_framebuffer *new_fb = plane_state->fb;
|
| 2208 | struct drm_framebuffer *old_fb = plane->state->fb;
|
| 2209 |
|
| 2210 | funcs = plane->helper_private;
|
| 2211 | funcs->atomic_async_update(plane, state);
|
| 2212 |
|
| 2213 | |
| 2214 | * ->atomic_async_update() is supposed to update the
|
| 2215 | * plane->state in-place, make sure at least common
|
| 2216 | * properties have been properly updated.
|
| 2217 |
|
| 2218 | WARN_ON_ONCE(plane->state->fb != new_fb);
|
| 2219 | WARN_ON_ONCE(plane->state->crtc_x != plane_state->crtc_x);
|
| 2220 | WARN_ON_ONCE(plane->state->crtc_y != plane_state->crtc_y);
|
| 2221 | WARN_ON_ONCE(plane->state->src_x != plane_state->src_x);
|
| 2222 | WARN_ON_ONCE(plane->state->src_y != plane_state->src_y);
|
| 2223 |
|
| 2224 | |
| 2225 | * Make sure the FBs have been swapped so that cleanups in the
|
| 2226 | * new_state performs a cleanup in the old FB.
|
| 2227 |
|
| 2228 | WARN_ON_ONCE(plane_state->fb != old_fb);
|
| 2229 | }
|
| 2230 | }
|
| 2231 | EXPORT_SYMBOL(drm_atomic_helper_async_commit);
|
| 2232 |
|
| 2233 | |
| 2234 | * drm_atomic_helper_commit - commit validated state object
|
| 2235 | * @dev: DRM device
|
| 2236 | * @state: the driver state object
|
| 2237 | * @nonblock: whether nonblocking behavior is requested.
|
| 2238 | *
|
| 2239 | * This function commits a with drm_atomic_helper_check() pre-validated state
|
| 2240 | * object. This can still fail when e.g. the framebuffer reservation fails. This
|
| 2241 | * function implements nonblocking commits, using
|
| 2242 | * drm_atomic_helper_setup_commit() and related functions.
|
| 2243 | *
|
| 2244 | * Committing the actual hardware state is done through the
|
| 2245 | * &drm_mode_config_helper_funcs.atomic_commit_tail callback, or its default
|
| 2246 | * implementation drm_atomic_helper_commit_tail().
|
| 2247 | *
|
| 2248 | * RETURNS:
|
| 2249 | * Zero for success or -errno.
|
| 2250 |
|
| 2251 | int drm_atomic_helper_commit(struct drm_device *dev,
|
| 2252 | struct drm_atomic_commit *state,
|
| 2253 | bool nonblock)
|
| 2254 | {
|
| 2255 | int ret;
|
| 2256 |
|
| 2257 | if (state->async_update) {
|
| 2258 | ret = drm_atomic_helper_prepare_planes(dev, state);
|
| 2259 | if (ret)
|
| 2260 | return ret;
|
| 2261 |
|
| 2262 | drm_atomic_helper_async_commit(dev, state);
|
| 2263 | drm_atomic_helper_unprepare_planes(dev, state);
|
| 2264 |
|
| 2265 | return 0;
|
| 2266 | }
|
| 2267 |
|
| 2268 | ret = drm_atomic_helper_setup_commit(state, nonblock);
|
| 2269 | if (ret)
|
| 2270 | return ret;
|
| 2271 |
|
| 2272 | INIT_WORK(&state->commit_work, commit_work);
|
| 2273 |
|
| 2274 | ret = drm_atomic_helper_prepare_planes(dev, state);
|
| 2275 | if (ret)
|
| 2276 | return ret;
|
| 2277 |
|
| 2278 | if (!nonblock) {
|
| 2279 | ret = drm_atomic_helper_wait_for_fences(dev, state, true);
|
| 2280 | if (ret)
|
| 2281 | goto err;
|
| 2282 | }
|
| 2283 |
|
| 2284 | |
| 2285 | * This is the point of no return - everything below never fails except
|
| 2286 | * when the hw goes bonghits. Which means we can commit the new state on
|
| 2287 | * the software side now.
|
| 2288 |
|
| 2289 |
|
| 2290 | ret = drm_atomic_helper_swap_state(state, true);
|
| 2291 | if (ret)
|
| 2292 | goto err;
|
| 2293 |
|
| 2294 | |
| 2295 | * Everything below can be run asynchronously without the need to grab
|
| 2296 | * any modeset locks at all under one condition: It must be guaranteed
|
| 2297 | * that the asynchronous work has either been cancelled (if the driver
|
| 2298 | * supports it, which at least requires that the framebuffers get
|
| 2299 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
|
| 2300 | * before the new state gets committed on the software side with
|
| 2301 | * drm_atomic_helper_swap_state().
|
| 2302 | *
|
| 2303 | * This scheme allows new atomic state updates to be prepared and
|
| 2304 | * checked in parallel to the asynchronous completion of the previous
|
| 2305 | * update. Which is important since compositors need to figure out the
|
| 2306 | * composition of the next frame right after having submitted the
|
| 2307 | * current layout.
|
| 2308 | *
|
| 2309 | * NOTE: Commit work has multiple phases, first hardware commit, then
|
| 2310 | * cleanup. We want them to overlap, hence need system_dfl_wq to
|
| 2311 | * make sure work items don't artificially stall on each another.
|
| 2312 |
|
| 2313 |
|
| 2314 | drm_atomic_commit_get(state);
|
| 2315 | if (nonblock)
|
| 2316 | queue_work(system_dfl_wq, &state->commit_work);
|
| 2317 | else
|
| 2318 | commit_tail(state);
|
| 2319 |
|
| 2320 | return 0;
|
| 2321 |
|
| 2322 | err:
|
| 2323 | drm_atomic_helper_unprepare_planes(dev, state);
|
| 2324 | return ret;
|
| 2325 | }
|
| 2326 | EXPORT_SYMBOL(drm_atomic_helper_commit);
|
| 2327 |
|
| 2328 | |
| 2329 | * DOC: implementing nonblocking commit
|
| 2330 | *
|
| 2331 | * Nonblocking atomic commits should use struct &drm_crtc_commit to sequence
|
| 2332 | * different operations against each another. Locks, especially struct
|
| 2333 | * &drm_modeset_lock, should not be held in worker threads or any other
|
| 2334 | * asynchronous context used to commit the hardware state.
|
| 2335 | *
|
| 2336 | * drm_atomic_helper_commit() implements the recommended sequence for
|
| 2337 | * nonblocking commits, using drm_atomic_helper_setup_commit() internally:
|
| 2338 | *
|
| 2339 | * 1. Run drm_atomic_helper_prepare_planes(). Since this can fail and we
|
| 2340 | * need to propagate out of memory/VRAM errors to userspace, it must be called
|
| 2341 | * synchronously.
|
| 2342 | *
|
| 2343 | * 2. Synchronize with any outstanding nonblocking commit worker threads which
|
| 2344 | * might be affected by the new state update. This is handled by
|
| 2345 | * drm_atomic_helper_setup_commit().
|
| 2346 | *
|
| 2347 | * Asynchronous workers need to have sufficient parallelism to be able to run
|
| 2348 | * different atomic commits on different CRTCs in parallel. The simplest way to
|
| 2349 | * achieve this is by running them on the &system_dfl_wq work queue. Note
|
| 2350 | * that drivers are not required to split up atomic commits and run an
|
| 2351 | * individual commit in parallel - userspace is supposed to do that if it cares.
|
| 2352 | * But it might be beneficial to do that for modesets, since those necessarily
|
| 2353 | * must be done as one global operation, and enabling or disabling a CRTC can
|
| 2354 | * take a long time. But even that is not required.
|
| 2355 | *
|
| 2356 | * IMPORTANT: A &drm_atomic_commit update for multiple CRTCs is sequenced
|
| 2357 | * against all CRTCs therein. Therefore for atomic state updates which only flip
|
| 2358 | * planes the driver must not get the struct &drm_crtc_state of unrelated CRTCs
|
| 2359 | * in its atomic check code: This would prevent committing of atomic updates to
|
| 2360 | * multiple CRTCs in parallel. In general, adding additional state structures
|
| 2361 | * should be avoided as much as possible, because this reduces parallelism in
|
| 2362 | * (nonblocking) commits, both due to locking and due to commit sequencing
|
| 2363 | * requirements.
|
| 2364 | *
|
| 2365 | * 3. The software state is updated synchronously with
|
| 2366 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset
|
| 2367 | * locks means concurrent callers never see inconsistent state. Note that commit
|
| 2368 | * workers do not hold any locks; their access is only coordinated through
|
| 2369 | * ordering. If workers would access state only through the pointers in the
|
| 2370 | * free-standing state objects (currently not the case for any driver) then even
|
| 2371 | * multiple pending commits could be in-flight at the same time.
|
| 2372 | *
|
| 2373 | * 4. Schedule a work item to do all subsequent steps, using the split-out
|
| 2374 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and
|
| 2375 | * then cleaning up the framebuffers after the old framebuffer is no longer
|
| 2376 | * being displayed. The scheduled work should synchronize against other workers
|
| 2377 | * using the &drm_crtc_commit infrastructure as needed. See
|
| 2378 | * drm_atomic_helper_setup_commit() for more details.
|
| 2379 |
|
| 2380 |
|
| 2381 | static int stall_checks(struct drm_crtc *crtc, bool nonblock)
|
| 2382 | {
|
| 2383 | struct drm_crtc_commit *commit, *stall_commit = NULL;
|
| 2384 | bool completed = true;
|
| 2385 | int i;
|
| 2386 | long ret = 0;
|
| 2387 |
|
| 2388 | spin_lock(&crtc->commit_lock);
|
| 2389 | i = 0;
|
| 2390 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) {
|
| 2391 | if (i == 0) {
|
| 2392 | completed = try_wait_for_completion(&commit->flip_done);
|
| 2393 | |
| 2394 | * Userspace is not allowed to get ahead of the previous
|
| 2395 | * commit with nonblocking ones.
|
| 2396 |
|
| 2397 | if (!completed && nonblock) {
|
| 2398 | spin_unlock(&crtc->commit_lock);
|
| 2399 | drm_dbg_atomic(crtc->dev,
|
| 2400 | "[CRTC:%d:%s] busy with a previous commit\n",
|
| 2401 | crtc->base.id, crtc->name);
|
| 2402 |
|
| 2403 | return -EBUSY;
|
| 2404 | }
|
| 2405 | } else if (i == 1) {
|
| 2406 | stall_commit = drm_crtc_commit_get(commit);
|
| 2407 | break;
|
| 2408 | }
|
| 2409 |
|
| 2410 | i++;
|
| 2411 | }
|
| 2412 | spin_unlock(&crtc->commit_lock);
|
| 2413 |
|
| 2414 | if (!stall_commit)
|
| 2415 | return 0;
|
| 2416 |
|
| 2417 | |
| 2418 | * stalling on 2nd previous commit means triple-buffer won't ever stall.
|
| 2419 |
|
| 2420 | ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done,
|
| 2421 | 10*HZ);
|
| 2422 | if (ret == 0)
|
| 2423 | drm_err(crtc->dev, "[CRTC:%d:%s] cleanup_done timed out\n",
|
| 2424 | crtc->base.id, crtc->name);
|
| 2425 |
|
| 2426 | drm_crtc_commit_put(stall_commit);
|
| 2427 |
|
| 2428 | return ret < 0 ? ret : 0;
|
| 2429 | }
|
| 2430 |
|
| 2431 | static void release_crtc_commit(struct completion *completion)
|
| 2432 | {
|
| 2433 | struct drm_crtc_commit *commit = container_of(completion,
|
| 2434 | typeof(*commit),
|
| 2435 | flip_done);
|
| 2436 |
|
| 2437 | drm_crtc_commit_put(commit);
|
| 2438 | }
|
| 2439 |
|
| 2440 | static void init_commit(struct drm_crtc_commit *commit, struct drm_crtc *crtc)
|
| 2441 | {
|
| 2442 | init_completion(&commit->flip_done);
|
| 2443 | init_completion(&commit->hw_done);
|
| 2444 | init_completion(&commit->cleanup_done);
|
| 2445 | INIT_LIST_HEAD(&commit->commit_entry);
|
| 2446 | kref_init(&commit->ref);
|
| 2447 | commit->crtc = crtc;
|
| 2448 | }
|
| 2449 |
|
| 2450 | static struct drm_crtc_commit *
|
| 2451 | crtc_or_fake_commit(struct drm_atomic_commit *state, struct drm_crtc *crtc)
|
| 2452 | {
|
| 2453 | if (crtc) {
|
| 2454 | struct drm_crtc_state *new_crtc_state;
|
| 2455 |
|
| 2456 | new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
|
| 2457 |
|
| 2458 | return new_crtc_state->commit;
|
| 2459 | }
|
| 2460 |
|
| 2461 | if (!state->fake_commit) {
|
| 2462 | state->fake_commit = kzalloc_obj(*state->fake_commit);
|
| 2463 | if (!state->fake_commit)
|
| 2464 | return NULL;
|
| 2465 |
|
| 2466 | init_commit(state->fake_commit, NULL);
|
| 2467 | }
|
| 2468 |
|
| 2469 | return state->fake_commit;
|
| 2470 | }
|
| 2471 |
|
| 2472 | |
| 2473 | * drm_atomic_helper_setup_commit - setup possibly nonblocking commit
|
| 2474 | * @state: new modeset state to be committed
|
| 2475 | * @nonblock: whether nonblocking behavior is requested.
|
| 2476 | *
|
| 2477 | * This function prepares @state to be used by the atomic helper's support for
|
| 2478 | * nonblocking commits. Drivers using the nonblocking commit infrastructure
|
| 2479 | * should always call this function from their
|
| 2480 | * &drm_mode_config_funcs.atomic_commit hook.
|
| 2481 | *
|
| 2482 | * Drivers that need to extend the commit setup to private objects can use the
|
| 2483 | * &drm_mode_config_helper_funcs.atomic_commit_setup hook.
|
| 2484 | *
|
| 2485 | * To be able to use this support drivers need to use a few more helper
|
| 2486 | * functions. drm_atomic_helper_wait_for_dependencies() must be called before
|
| 2487 | * actually committing the hardware state, and for nonblocking commits this call
|
| 2488 | * must be placed in the async worker. See also drm_atomic_helper_swap_state()
|
| 2489 | * and its stall parameter, for when a driver's commit hooks look at the
|
| 2490 | * &drm_crtc.state, &drm_plane.state or &drm_connector.state pointer directly.
|
| 2491 | *
|
| 2492 | * Completion of the hardware commit step must be signalled using
|
| 2493 | * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed
|
| 2494 | * to read or change any permanent software or hardware modeset state. The only
|
| 2495 | * exception is state protected by other means than &drm_modeset_lock locks.
|
| 2496 | * Only the free standing @state with pointers to the old state structures can
|
| 2497 | * be inspected, e.g. to clean up old buffers using
|
| 2498 | * drm_atomic_helper_cleanup_planes().
|
| 2499 | *
|
| 2500 | * At the very end, before cleaning up @state drivers must call
|
| 2501 | * drm_atomic_helper_commit_cleanup_done().
|
| 2502 | *
|
| 2503 | * This is all implemented by in drm_atomic_helper_commit(), giving drivers a
|
| 2504 | * complete and easy-to-use default implementation of the atomic_commit() hook.
|
| 2505 | *
|
| 2506 | * The tracking of asynchronously executed and still pending commits is done
|
| 2507 | * using the core structure &drm_crtc_commit.
|
| 2508 | *
|
| 2509 | * By default there's no need to clean up resources allocated by this function
|
| 2510 | * explicitly: drm_atomic_commit_default_clear() will take care of that
|
| 2511 | * automatically.
|
| 2512 | *
|
| 2513 | * Returns:
|
| 2514 | * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast,
|
| 2515 | * -ENOMEM on allocation failures and -EINTR when a signal is pending.
|
| 2516 |
|
| 2517 | int drm_atomic_helper_setup_commit(struct drm_atomic_commit *state,
|
| 2518 | bool nonblock)
|
| 2519 | {
|
| 2520 | struct drm_crtc *crtc;
|
| 2521 | struct drm_crtc_state *old_crtc_state, *new_crtc_state;
|
| 2522 | struct drm_connector *conn;
|
| 2523 | struct drm_connector_state *old_conn_state, *new_conn_state;
|
| 2524 | struct drm_plane *plane;
|
| 2525 | struct drm_plane_state *old_plane_state, *new_plane_state;
|
| 2526 | struct drm_crtc_commit *commit;
|
| 2527 | const struct drm_mode_config_helper_funcs *funcs;
|
| 2528 | int i, ret;
|
| 2529 |
|
| 2530 | funcs = state->dev->mode_config.helper_private;
|
| 2531 |
|
| 2532 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
|
| 2533 | commit = kzalloc_obj(*commit);
|
| 2534 | if (!commit)
|
| 2535 | return -ENOMEM;
|
| 2536 |
|
| 2537 | init_commit(commit, crtc);
|
| 2538 |
|
| 2539 | new_crtc_state->commit = commit;
|
| 2540 |
|
| 2541 | ret = stall_checks(crtc, nonblock);
|
| 2542 | if (ret)
|
| 2543 | return ret;
|
| 2544 |
|
| 2545 | |
| 2546 | * Drivers only send out events when at least either current or
|
| 2547 | * new CRTC state is active. Complete right away if everything
|
| 2548 | * stays off.
|
| 2549 |
|
| 2550 | if (!old_crtc_state->active && !new_crtc_state->active) {
|
| 2551 | complete_all(&commit->flip_done);
|
| 2552 | continue;
|
| 2553 | }
|
| 2554 |
|
| 2555 |
|
| 2556 | if (state->legacy_cursor_update) {
|
| 2557 | complete_all(&commit->flip_done);
|
| 2558 | continue;
|
| 2559 | }
|
| 2560 |
|
| 2561 | if (!new_crtc_state->event) {
|
| 2562 | commit->event = kzalloc_obj(*commit->event);
|
| 2563 | if (!commit->event)
|
| 2564 | return -ENOMEM;
|
| 2565 |
|
| 2566 | new_crtc_state->event = commit->event;
|
| 2567 | }
|
| 2568 |
|
| 2569 | new_crtc_state->event->base.completion = &commit->flip_done;
|
| 2570 | new_crtc_state->event->base.completion_release = release_crtc_commit;
|
| 2571 | drm_crtc_commit_get(commit);
|
| 2572 |
|
| 2573 | commit->abort_completion = true;
|
| 2574 |
|
| 2575 | state->crtcs[i].commit = commit;
|
| 2576 | drm_crtc_commit_get(commit);
|
| 2577 | }
|
| 2578 |
|
| 2579 | for_each_oldnew_connector_in_state(state, conn, old_conn_state, new_conn_state, i) {
|
| 2580 | |
| 2581 | * Userspace is not allowed to get ahead of the previous
|
| 2582 | * commit with nonblocking ones.
|
| 2583 |
|
| 2584 | if (nonblock && old_conn_state->commit &&
|
| 2585 | !try_wait_for_completion(&old_conn_state->commit->flip_done)) {
|
| 2586 | drm_dbg_atomic(conn->dev,
|
| 2587 | "[CONNECTOR:%d:%s] busy with a previous commit\n",
|
| 2588 | conn->base.id, conn->name);
|
| 2589 |
|
| 2590 | return -EBUSY;
|
| 2591 | }
|
| 2592 |
|
| 2593 |
|
| 2594 | commit = crtc_or_fake_commit(state, new_conn_state->crtc ?: old_conn_state->crtc);
|
| 2595 | if (!commit)
|
| 2596 | return -ENOMEM;
|
| 2597 |
|
| 2598 | new_conn_state->commit = drm_crtc_commit_get(commit);
|
| 2599 | }
|
| 2600 |
|
| 2601 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
|
| 2602 | |
| 2603 | * Userspace is not allowed to get ahead of the previous
|
| 2604 | * commit with nonblocking ones.
|
| 2605 |
|
| 2606 | if (nonblock && old_plane_state->commit &&
|
| 2607 | !try_wait_for_completion(&old_plane_state->commit->flip_done)) {
|
| 2608 | drm_dbg_atomic(plane->dev,
|
| 2609 | "[PLANE:%d:%s] busy with a previous commit\n",
|
| 2610 | plane->base.id, plane->name);
|
| 2611 |
|
| 2612 | return -EBUSY;
|
| 2613 | }
|
| 2614 |
|
| 2615 |
|
| 2616 | commit = crtc_or_fake_commit(state, new_plane_state->crtc ?: old_plane_state->crtc);
|
| 2617 | if (!commit)
|
| 2618 | return -ENOMEM;
|
| 2619 |
|
| 2620 | new_plane_state->commit = drm_crtc_commit_get(commit);
|
| 2621 | }
|
| 2622 |
|
| 2623 | if (funcs && funcs->atomic_commit_setup)
|
| 2624 | return funcs->atomic_commit_setup(state);
|
| 2625 |
|
| 2626 | return 0;
|
| 2627 | }
|
| 2628 | EXPORT_SYMBOL(drm_atomic_helper_setup_commit);
|
| 2629 |
|
| 2630 | |
| 2631 | * drm_atomic_helper_wait_for_dependencies - wait for required preceding commits
|
| 2632 | * @state: atomic state object being committed
|
| 2633 | *
|
| 2634 | * This function waits for all preceding commits that touch the same CRTC as
|
| 2635 | * @state to both be committed to the hardware (as signalled by
|
| 2636 | * drm_atomic_helper_commit_hw_done()) and executed by the hardware (as signalled
|
| 2637 | * by calling drm_crtc_send_vblank_event() on the &drm_crtc_state.event).
|
| 2638 | *
|
| 2639 | * This is part of the atomic helper support for nonblocking commits, see
|
| 2640 | * drm_atomic_helper_setup_commit() for an overview.
|
| 2641 |
|
| 2642 | void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_commit *state)
|
| 2643 | {
|
| 2644 | struct drm_crtc *crtc;
|
| 2645 | struct drm_crtc_state *old_crtc_state;
|
| 2646 | struct drm_plane *plane;
|
| 2647 | struct drm_plane_state *old_plane_state;
|
| 2648 | struct drm_connector *conn;
|
| 2649 | struct drm_connector_state *old_conn_state;
|
| 2650 | int i;
|
| 2651 | long ret;
|
| 2652 |
|
| 2653 | for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) {
|
| 2654 | ret = drm_crtc_commit_wait(old_crtc_state->commit);
|
| 2655 | if (ret)
|
| 2656 | drm_err(crtc->dev,
|
| 2657 | "[CRTC:%d:%s] commit wait timed out\n",
|
| 2658 | crtc->base.id, crtc->name);
|
| 2659 | }
|
| 2660 |
|
| 2661 | for_each_old_connector_in_state(state, conn, old_conn_state, i) {
|
| 2662 | ret = drm_crtc_commit_wait(old_conn_state->commit);
|
| 2663 | if (ret)
|
| 2664 | drm_err(conn->dev,
|
| 2665 | "[CONNECTOR:%d:%s] commit wait timed out\n",
|
| 2666 | conn->base.id, conn->name);
|
| 2667 | }
|
| 2668 |
|
| 2669 | for_each_old_plane_in_state(state, plane, old_plane_state, i) {
|
| 2670 | ret = drm_crtc_commit_wait(old_plane_state->commit);
|
| 2671 | if (ret)
|
| 2672 | drm_err(plane->dev,
|
| 2673 | "[PLANE:%d:%s] commit wait timed out\n",
|
| 2674 | plane->base.id, plane->name);
|
| 2675 | }
|
| 2676 | }
|
| 2677 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies);
|
| 2678 |
|
| 2679 | |
| 2680 | * drm_atomic_helper_fake_vblank - fake VBLANK events if needed
|
| 2681 | * @state: atomic state object being committed
|
| 2682 | *
|
| 2683 | * This function walks all CRTCs and fakes VBLANK events on those with
|
| 2684 | * &drm_crtc_state.no_vblank set to true and &drm_crtc_state.event != NULL.
|
| 2685 | * The primary use of this function is writeback connectors working in oneshot
|
| 2686 | * mode and faking VBLANK events. In this case they only fake the VBLANK event
|
| 2687 | * when a job is queued, and any change to the pipeline that does not touch the
|
| 2688 | * connector is leading to timeouts when calling
|
| 2689 | * drm_atomic_helper_wait_for_vblanks() or
|
| 2690 | * drm_atomic_helper_wait_for_flip_done(). In addition to writeback
|
| 2691 | * connectors, this function can also fake VBLANK events for CRTCs without
|
| 2692 | * VBLANK interrupt.
|
| 2693 | *
|
| 2694 | * This is part of the atomic helper support for nonblocking commits, see
|
| 2695 | * drm_atomic_helper_setup_commit() for an overview.
|
| 2696 |
|
| 2697 | void drm_atomic_helper_fake_vblank(struct drm_atomic_commit *state)
|
| 2698 | {
|
| 2699 | struct drm_crtc_state *new_crtc_state;
|
| 2700 | struct drm_crtc *crtc;
|
| 2701 | int i;
|
| 2702 |
|
| 2703 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
|
| 2704 | unsigned long flags;
|
| 2705 |
|
| 2706 | if (!new_crtc_state->no_vblank)
|
| 2707 | continue;
|
| 2708 |
|
| 2709 | spin_lock_irqsave(&state->dev->event_lock, flags);
|
| 2710 | if (new_crtc_state->event) {
|
| 2711 | drm_crtc_send_vblank_event(crtc,
|
| 2712 | new_crtc_state->event);
|
| 2713 | new_crtc_state->event = NULL;
|
| 2714 | }
|
| 2715 | spin_unlock_irqrestore(&state->dev->event_lock, flags);
|
| 2716 | }
|
| 2717 | }
|
| 2718 | EXPORT_SYMBOL(drm_atomic_helper_fake_vblank);
|
| 2719 |
|
| 2720 | |
| 2721 | * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit
|
| 2722 | * @state: atomic state object being committed
|
| 2723 | *
|
| 2724 | * This function is used to signal completion of the hardware commit step. After
|
| 2725 | * this step the driver is not allowed to read or change any permanent software
|
| 2726 | * or hardware modeset state. The only exception is state protected by other
|
| 2727 | * means than &drm_modeset_lock locks.
|
| 2728 | *
|
| 2729 | * Drivers should try to postpone any expensive or delayed cleanup work after
|
| 2730 | * this function is called.
|
| 2731 | *
|
| 2732 | * This is part of the atomic helper support for nonblocking commits, see
|
| 2733 | * drm_atomic_helper_setup_commit() for an overview.
|
| 2734 |
|
| 2735 | void drm_atomic_helper_commit_hw_done(struct drm_atomic_commit *state)
|
| 2736 | {
|
| 2737 | struct drm_crtc *crtc;
|
| 2738 | struct drm_crtc_state *old_crtc_state, *new_crtc_state;
|
| 2739 | struct drm_crtc_commit *commit;
|
| 2740 | int i;
|
| 2741 |
|
| 2742 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
|
| 2743 | commit = new_crtc_state->commit;
|
| 2744 | if (!commit)
|
| 2745 | continue;
|
| 2746 |
|
| 2747 | |
| 2748 | * copy new_crtc_state->commit to old_crtc_state->commit,
|
| 2749 | * it's unsafe to touch new_crtc_state after hw_done,
|
| 2750 | * but we still need to do so in cleanup_done().
|
| 2751 |
|
| 2752 | if (old_crtc_state->commit)
|
| 2753 | drm_crtc_commit_put(old_crtc_state->commit);
|
| 2754 |
|
| 2755 | old_crtc_state->commit = drm_crtc_commit_get(commit);
|
| 2756 |
|
| 2757 |
|
| 2758 | WARN_ON(new_crtc_state->event);
|
| 2759 | complete_all(&commit->hw_done);
|
| 2760 | }
|
| 2761 |
|
| 2762 | if (state->fake_commit) {
|
| 2763 | complete_all(&state->fake_commit->hw_done);
|
| 2764 | complete_all(&state->fake_commit->flip_done);
|
| 2765 | }
|
| 2766 | }
|
| 2767 | EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done);
|
| 2768 |
|
| 2769 | |
| 2770 | * drm_atomic_helper_commit_cleanup_done - signal completion of commit
|
| 2771 | * @state: atomic state object being committed
|
| 2772 | *
|
| 2773 | * This signals completion of the atomic update @state, including any
|
| 2774 | * cleanup work. If used, it must be called right before calling
|
| 2775 | * drm_atomic_commit_put().
|
| 2776 | *
|
| 2777 | * This is part of the atomic helper support for nonblocking commits, see
|
| 2778 | * drm_atomic_helper_setup_commit() for an overview.
|
| 2779 |
|
| 2780 | void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_commit *state)
|
| 2781 | {
|
| 2782 | struct drm_crtc *crtc;
|
| 2783 | struct drm_crtc_state *old_crtc_state;
|
| 2784 | struct drm_crtc_commit *commit;
|
| 2785 | int i;
|
| 2786 |
|
| 2787 | for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) {
|
| 2788 | commit = old_crtc_state->commit;
|
| 2789 | if (WARN_ON(!commit))
|
| 2790 | continue;
|
| 2791 |
|
| 2792 | complete_all(&commit->cleanup_done);
|
| 2793 | WARN_ON(!try_wait_for_completion(&commit->hw_done));
|
| 2794 |
|
| 2795 | spin_lock(&crtc->commit_lock);
|
| 2796 | list_del(&commit->commit_entry);
|
| 2797 | spin_unlock(&crtc->commit_lock);
|
| 2798 | }
|
| 2799 |
|
| 2800 | if (state->fake_commit) {
|
| 2801 | complete_all(&state->fake_commit->cleanup_done);
|
| 2802 | WARN_ON(!try_wait_for_completion(&state->fake_commit->hw_done));
|
| 2803 | }
|
| 2804 | }
|
| 2805 | EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done);
|
| 2806 |
|
| 2807 | |
| 2808 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit
|
| 2809 | * @dev: DRM device
|
| 2810 | * @state: atomic state object with new state structures
|
| 2811 | *
|
| 2812 | * This function prepares plane state, specifically framebuffers, for the new
|
| 2813 | * configuration, by calling &drm_plane_helper_funcs.prepare_fb. If any failure
|
| 2814 | * is encountered this function will call &drm_plane_helper_funcs.cleanup_fb on
|
| 2815 | * any already successfully prepared framebuffer.
|
| 2816 | *
|
| 2817 | * Returns:
|
| 2818 | * 0 on success, negative error code on failure.
|
| 2819 |
|
| 2820 | int drm_atomic_helper_prepare_planes(struct drm_device *dev,
|
| 2821 | struct drm_atomic_commit *state)
|
| 2822 | {
|
| 2823 | struct drm_connector *connector;
|
| 2824 | struct drm_connector_state *new_conn_state;
|
| 2825 | struct drm_plane *plane;
|
| 2826 | struct drm_plane_state *new_plane_state;
|
| 2827 | int ret, i, j;
|
| 2828 |
|
| 2829 | for_each_new_connector_in_state(state, connector, new_conn_state, i) {
|
| 2830 | if (!new_conn_state->writeback_job)
|
| 2831 | continue;
|
| 2832 |
|
| 2833 | ret = drm_writeback_prepare_job(new_conn_state->writeback_job);
|
| 2834 | if (ret < 0)
|
| 2835 | return ret;
|
| 2836 | }
|
| 2837 |
|
| 2838 | for_each_new_plane_in_state(state, plane, new_plane_state, i) {
|
| 2839 | const struct drm_plane_helper_funcs *funcs;
|
| 2840 |
|
| 2841 | funcs = plane->helper_private;
|
| 2842 |
|
| 2843 | if (funcs->prepare_fb) {
|
| 2844 | ret = funcs->prepare_fb(plane, new_plane_state);
|
| 2845 | if (ret)
|
| 2846 | goto fail_prepare_fb;
|
| 2847 | } else {
|
| 2848 | WARN_ON_ONCE(funcs->cleanup_fb);
|
| 2849 |
|
| 2850 | if (!drm_core_check_feature(dev, DRIVER_GEM))
|
| 2851 | continue;
|
| 2852 |
|
| 2853 | ret = drm_gem_plane_helper_prepare_fb(plane, new_plane_state);
|
| 2854 | if (ret)
|
| 2855 | goto fail_prepare_fb;
|
| 2856 | }
|
| 2857 | }
|
| 2858 |
|
| 2859 | for_each_new_plane_in_state(state, plane, new_plane_state, i) {
|
| 2860 | const struct drm_plane_helper_funcs *funcs = plane->helper_private;
|
| 2861 |
|
| 2862 | if (funcs->begin_fb_access) {
|
| 2863 | ret = funcs->begin_fb_access(plane, new_plane_state);
|
| 2864 | if (ret)
|
| 2865 | goto fail_begin_fb_access;
|
| 2866 | }
|
| 2867 | }
|
| 2868 |
|
| 2869 | return 0;
|
| 2870 |
|
| 2871 | fail_begin_fb_access:
|
| 2872 | for_each_new_plane_in_state(state, plane, new_plane_state, j) {
|
| 2873 | const struct drm_plane_helper_funcs *funcs = plane->helper_private;
|
| 2874 |
|
| 2875 | if (j >= i)
|
| 2876 | continue;
|
| 2877 |
|
| 2878 | if (funcs->end_fb_access)
|
| 2879 | funcs->end_fb_access(plane, new_plane_state);
|
| 2880 | }
|
| 2881 | i = j;
|
| 2882 | fail_prepare_fb:
|
| 2883 | for_each_new_plane_in_state(state, plane, new_plane_state, j) {
|
| 2884 | const struct drm_plane_helper_funcs *funcs;
|
| 2885 |
|
| 2886 | if (j >= i)
|
| 2887 | continue;
|
| 2888 |
|
| 2889 | funcs = plane->helper_private;
|
| 2890 |
|
| 2891 | if (funcs->cleanup_fb)
|
| 2892 | funcs->cleanup_fb(plane, new_plane_state);
|
| 2893 | }
|
| 2894 |
|
| 2895 | return ret;
|
| 2896 | }
|
| 2897 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes);
|
| 2898 |
|
| 2899 | |
| 2900 | * drm_atomic_helper_unprepare_planes - release plane resources on aborts
|
| 2901 | * @dev: DRM device
|
| 2902 | * @state: atomic state object with old state structures
|
| 2903 | *
|
| 2904 | * This function cleans up plane state, specifically framebuffers, from the
|
| 2905 | * atomic state. It undoes the effects of drm_atomic_helper_prepare_planes()
|
| 2906 | * when aborting an atomic commit. For cleaning up after a successful commit
|
| 2907 | * use drm_atomic_helper_cleanup_planes().
|
| 2908 |
|
| 2909 | void drm_atomic_helper_unprepare_planes(struct drm_device *dev,
|
| 2910 | struct drm_atomic_commit *state)
|
| 2911 | {
|
| 2912 | struct drm_plane *plane;
|
| 2913 | struct drm_plane_state *new_plane_state;
|
| 2914 | int i;
|
| 2915 |
|
| 2916 | for_each_new_plane_in_state(state, plane, new_plane_state, i) {
|
| 2917 | const struct drm_plane_helper_funcs *funcs = plane->helper_private;
|
| 2918 |
|
| 2919 | if (funcs->end_fb_access)
|
| 2920 | funcs->end_fb_access(plane, new_plane_state);
|
| 2921 | }
|
| 2922 |
|
| 2923 | for_each_new_plane_in_state(state, plane, new_plane_state, i) {
|
| 2924 | const struct drm_plane_helper_funcs *funcs = plane->helper_private;
|
| 2925 |
|
| 2926 | if (funcs->cleanup_fb)
|
| 2927 | funcs->cleanup_fb(plane, new_plane_state);
|
| 2928 | }
|
| 2929 | }
|
| 2930 | EXPORT_SYMBOL(drm_atomic_helper_unprepare_planes);
|
| 2931 |
|
| 2932 | static bool plane_crtc_active(const struct drm_plane_state *state)
|
| 2933 | {
|
| 2934 | return state->crtc && state->crtc->state->active;
|
| 2935 | }
|
| 2936 |
|
| 2937 | |
| 2938 | * drm_atomic_helper_commit_planes - commit plane state
|
| 2939 | * @dev: DRM device
|
| 2940 | * @state: atomic state object being committed
|
| 2941 | * @flags: flags for committing plane state
|
| 2942 | *
|
| 2943 | * This function commits the new plane state using the plane and atomic helper
|
| 2944 | * functions for planes and CRTCs. It assumes that the atomic state has already
|
| 2945 | * been pushed into the relevant object state pointers, since this step can no
|
| 2946 | * longer fail.
|
| 2947 | *
|
| 2948 | * It still requires the global state object @state to know which planes and
|
| 2949 | * crtcs need to be updated though.
|
| 2950 | *
|
| 2951 | * Note that this function does all plane updates across all CRTCs in one step.
|
| 2952 | * If the hardware can't support this approach look at
|
| 2953 | * drm_atomic_helper_commit_planes_on_crtc() instead.
|
| 2954 | *
|
| 2955 | * Plane parameters can be updated by applications while the associated CRTC is
|
| 2956 | * disabled. The DRM/KMS core will store the parameters in the plane state,
|
| 2957 | * which will be available to the driver when the CRTC is turned on. As a result
|
| 2958 | * most drivers don't need to be immediately notified of plane updates for a
|
| 2959 | * disabled CRTC.
|
| 2960 | *
|
| 2961 | * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in
|
| 2962 | * @flags in order not to receive plane update notifications related to a
|
| 2963 | * disabled CRTC. This avoids the need to manually ignore plane updates in
|
| 2964 | * driver code when the driver and/or hardware can't or just don't need to deal
|
| 2965 | * with updates on disabled CRTCs, for example when supporting runtime PM.
|
| 2966 | *
|
| 2967 | * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant
|
| 2968 | * display controllers require to disable a CRTC's planes when the CRTC is
|
| 2969 | * disabled. This function would skip the &drm_plane_helper_funcs.atomic_disable
|
| 2970 | * call for a plane if the CRTC of the old plane state needs a modesetting
|
| 2971 | * operation. Of course, the drivers need to disable the planes in their CRTC
|
| 2972 | * disable callbacks since no one else would do that.
|
| 2973 | *
|
| 2974 | * The drm_atomic_helper_commit() default implementation doesn't set the
|
| 2975 | * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers.
|
| 2976 | * This should not be copied blindly by drivers.
|
| 2977 |
|
| 2978 | void drm_atomic_helper_commit_planes(struct drm_device *dev,
|
| 2979 | struct drm_atomic_commit *state,
|
| 2980 | uint32_t flags)
|
| 2981 | {
|
| 2982 | struct drm_crtc *crtc;
|
| 2983 | struct drm_crtc_state *old_crtc_state, *new_crtc_state;
|
| 2984 | struct drm_plane *plane;
|
| 2985 | struct drm_plane_state *old_plane_state, *new_plane_state;
|
| 2986 | int i;
|
| 2987 | bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY;
|
| 2988 | bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET;
|
| 2989 |
|
| 2990 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
|
| 2991 | const struct drm_crtc_helper_funcs *funcs;
|
| 2992 |
|
| 2993 | funcs = crtc->helper_private;
|
| 2994 |
|
| 2995 | if (!funcs || !funcs->atomic_begin)
|
| 2996 | continue;
|
| 2997 |
|
| 2998 | if (active_only && !new_crtc_state->active)
|
| 2999 | continue;
|
| 3000 |
|
| 3001 | funcs->atomic_begin(crtc, state);
|
| 3002 | }
|
| 3003 |
|
| 3004 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
|
| 3005 | const struct drm_plane_helper_funcs *funcs;
|
| 3006 | bool disabling;
|
| 3007 |
|
| 3008 | funcs = plane->helper_private;
|
| 3009 |
|
| 3010 | if (!funcs)
|
| 3011 | continue;
|
| 3012 |
|
| 3013 | disabling = drm_atomic_plane_disabling(old_plane_state,
|
| 3014 | new_plane_state);
|
| 3015 |
|
| 3016 | if (active_only) {
|
| 3017 | |
| 3018 | * Skip planes related to inactive CRTCs. If the plane
|
| 3019 | * is enabled use the state of the current CRTC. If the
|
| 3020 | * plane is being disabled use the state of the old
|
| 3021 | * CRTC to avoid skipping planes being disabled on an
|
| 3022 | * active CRTC.
|
| 3023 |
|
| 3024 | if (!disabling && !plane_crtc_active(new_plane_state))
|
| 3025 | continue;
|
| 3026 | if (disabling && !plane_crtc_active(old_plane_state))
|
| 3027 | continue;
|
| 3028 | }
|
| 3029 |
|
| 3030 | |
| 3031 | * Special-case disabling the plane if drivers support it.
|
| 3032 |
|
| 3033 | if (disabling && funcs->atomic_disable) {
|
| 3034 | struct drm_crtc_state *crtc_state;
|
| 3035 |
|
| 3036 | crtc_state = old_plane_state->crtc->state;
|
| 3037 |
|
| 3038 | if (drm_atomic_crtc_needs_modeset(crtc_state) &&
|
| 3039 | no_disable)
|
| 3040 | continue;
|
| 3041 |
|
| 3042 | funcs->atomic_disable(plane, state);
|
| 3043 | } else if (new_plane_state->crtc || disabling) {
|
| 3044 | funcs->atomic_update(plane, state);
|
| 3045 |
|
| 3046 | if (!disabling && funcs->atomic_enable) {
|
| 3047 | if (drm_atomic_plane_enabling(old_plane_state, new_plane_state))
|
| 3048 | funcs->atomic_enable(plane, state);
|
| 3049 | }
|
| 3050 | }
|
| 3051 | }
|
| 3052 |
|
| 3053 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
|
| 3054 | const struct drm_crtc_helper_funcs *funcs;
|
| 3055 |
|
| 3056 | funcs = crtc->helper_private;
|
| 3057 |
|
| 3058 | if (!funcs || !funcs->atomic_flush)
|
| 3059 | continue;
|
| 3060 |
|
| 3061 | if (active_only && !new_crtc_state->active)
|
| 3062 | continue;
|
| 3063 |
|
| 3064 | funcs->atomic_flush(crtc, state);
|
| 3065 | }
|
| 3066 |
|
| 3067 | |
| 3068 | * Signal end of framebuffer access here before hw_done. After hw_done,
|
| 3069 | * a later commit might have already released the plane state.
|
| 3070 |
|
| 3071 | for_each_old_plane_in_state(state, plane, old_plane_state, i) {
|
| 3072 | const struct drm_plane_helper_funcs *funcs = plane->helper_private;
|
| 3073 |
|
| 3074 | if (funcs->end_fb_access)
|
| 3075 | funcs->end_fb_access(plane, old_plane_state);
|
| 3076 | }
|
| 3077 | }
|
| 3078 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes);
|
| 3079 |
|
| 3080 | |
| 3081 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a CRTC
|
| 3082 | * @old_crtc_state: atomic state object with the old CRTC state
|
| 3083 | *
|
| 3084 | * This function commits the new plane state using the plane and atomic helper
|
| 3085 | * functions for planes on the specific CRTC. It assumes that the atomic state
|
| 3086 | * has already been pushed into the relevant object state pointers, since this
|
| 3087 | * step can no longer fail.
|
| 3088 | *
|
| 3089 | * This function is useful when plane updates should be done CRTC-by-CRTC
|
| 3090 | * instead of one global step like drm_atomic_helper_commit_planes() does.
|
| 3091 | *
|
| 3092 | * This function can only be savely used when planes are not allowed to move
|
| 3093 | * between different CRTCs because this function doesn't handle inter-CRTC
|
| 3094 | * dependencies. Callers need to ensure that either no such dependencies exist,
|
| 3095 | * resolve them through ordering of commit calls or through some other means.
|
| 3096 |
|
| 3097 | void
|
| 3098 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state)
|
| 3099 | {
|
| 3100 | const struct drm_crtc_helper_funcs *crtc_funcs;
|
| 3101 | struct drm_crtc *crtc = old_crtc_state->crtc;
|
| 3102 | struct drm_atomic_commit *old_state = old_crtc_state->state;
|
| 3103 | struct drm_crtc_state *new_crtc_state =
|
| 3104 | drm_atomic_get_new_crtc_state(old_state, crtc);
|
| 3105 | struct drm_plane *plane;
|
| 3106 | unsigned int plane_mask;
|
| 3107 |
|
| 3108 | plane_mask = old_crtc_state->plane_mask;
|
| 3109 | plane_mask |= new_crtc_state->plane_mask;
|
| 3110 |
|
| 3111 | crtc_funcs = crtc->helper_private;
|
| 3112 | if (crtc_funcs && crtc_funcs->atomic_begin)
|
| 3113 | crtc_funcs->atomic_begin(crtc, old_state);
|
| 3114 |
|
| 3115 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) {
|
| 3116 | struct drm_plane_state *old_plane_state =
|
| 3117 | drm_atomic_get_old_plane_state(old_state, plane);
|
| 3118 | struct drm_plane_state *new_plane_state =
|
| 3119 | drm_atomic_get_new_plane_state(old_state, plane);
|
| 3120 | const struct drm_plane_helper_funcs *plane_funcs;
|
| 3121 | bool disabling;
|
| 3122 |
|
| 3123 | plane_funcs = plane->helper_private;
|
| 3124 |
|
| 3125 | if (!old_plane_state || !plane_funcs)
|
| 3126 | continue;
|
| 3127 |
|
| 3128 | WARN_ON(new_plane_state->crtc &&
|
| 3129 | new_plane_state->crtc != crtc);
|
| 3130 |
|
| 3131 | disabling = drm_atomic_plane_disabling(old_plane_state, new_plane_state);
|
| 3132 |
|
| 3133 | if (disabling && plane_funcs->atomic_disable) {
|
| 3134 | plane_funcs->atomic_disable(plane, old_state);
|
| 3135 | } else if (new_plane_state->crtc || disabling) {
|
| 3136 | plane_funcs->atomic_update(plane, old_state);
|
| 3137 |
|
| 3138 | if (!disabling && plane_funcs->atomic_enable) {
|
| 3139 | if (drm_atomic_plane_enabling(old_plane_state, new_plane_state))
|
| 3140 | plane_funcs->atomic_enable(plane, old_state);
|
| 3141 | }
|
| 3142 | }
|
| 3143 | }
|
| 3144 |
|
| 3145 | if (crtc_funcs && crtc_funcs->atomic_flush)
|
| 3146 | crtc_funcs->atomic_flush(crtc, old_state);
|
| 3147 | }
|
| 3148 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc);
|
| 3149 |
|
| 3150 | |
| 3151 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes
|
| 3152 | * @old_crtc_state: atomic state object with the old CRTC state
|
| 3153 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks
|
| 3154 | *
|
| 3155 | * Disables all planes associated with the given CRTC. This can be
|
| 3156 | * used for instance in the CRTC helper atomic_disable callback to disable
|
| 3157 | * all planes.
|
| 3158 | *
|
| 3159 | * If the atomic-parameter is set the function calls the CRTC's
|
| 3160 | * atomic_begin hook before and atomic_flush hook after disabling the
|
| 3161 | * planes.
|
| 3162 | *
|
| 3163 | * It is a bug to call this function without having implemented the
|
| 3164 | * &drm_plane_helper_funcs.atomic_disable plane hook.
|
| 3165 |
|
| 3166 | void
|
| 3167 | drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
|
| 3168 | bool atomic)
|
| 3169 | {
|
| 3170 | struct drm_crtc *crtc = old_crtc_state->crtc;
|
| 3171 | const struct drm_crtc_helper_funcs *crtc_funcs =
|
| 3172 | crtc->helper_private;
|
| 3173 | struct drm_plane *plane;
|
| 3174 |
|
| 3175 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin)
|
| 3176 | crtc_funcs->atomic_begin(crtc, NULL);
|
| 3177 |
|
| 3178 | drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) {
|
| 3179 | const struct drm_plane_helper_funcs *plane_funcs =
|
| 3180 | plane->helper_private;
|
| 3181 |
|
| 3182 | if (!plane_funcs)
|
| 3183 | continue;
|
| 3184 |
|
| 3185 | WARN_ON(!plane_funcs->atomic_disable);
|
| 3186 | if (plane_funcs->atomic_disable)
|
| 3187 | plane_funcs->atomic_disable(plane, NULL);
|
| 3188 | }
|
| 3189 |
|
| 3190 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush)
|
| 3191 | crtc_funcs->atomic_flush(crtc, NULL);
|
| 3192 | }
|
| 3193 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc);
|
| 3194 |
|
| 3195 | |
| 3196 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit
|
| 3197 | * @dev: DRM device
|
| 3198 | * @state: atomic state object being committed
|
| 3199 | *
|
| 3200 | * This function cleans up plane state, specifically framebuffers, from the old
|
| 3201 | * configuration. Hence the old configuration must be perserved in @state to
|
| 3202 | * be able to call this function.
|
| 3203 | *
|
| 3204 | * This function may not be called on the new state when the atomic update
|
| 3205 | * fails at any point after calling drm_atomic_helper_prepare_planes(). Use
|
| 3206 | * drm_atomic_helper_unprepare_planes() in this case.
|
| 3207 |
|
| 3208 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
|
| 3209 | struct drm_atomic_commit *state)
|
| 3210 | {
|
| 3211 | struct drm_plane *plane;
|
| 3212 | struct drm_plane_state *old_plane_state;
|
| 3213 | int i;
|
| 3214 |
|
| 3215 | for_each_old_plane_in_state(state, plane, old_plane_state, i) {
|
| 3216 | const struct drm_plane_helper_funcs *funcs = plane->helper_private;
|
| 3217 |
|
| 3218 | if (funcs->cleanup_fb)
|
| 3219 | funcs->cleanup_fb(plane, old_plane_state);
|
| 3220 | }
|
| 3221 | }
|
| 3222 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes);
|
| 3223 |
|
| 3224 | |
| 3225 | * drm_atomic_helper_swap_state - store atomic state into current sw state
|
| 3226 | * @state: atomic state
|
| 3227 | * @stall: stall for preceding commits
|
| 3228 | *
|
| 3229 | * This function stores the atomic state into the current state pointers in all
|
| 3230 | * driver objects. It should be called after all failing steps have been done
|
| 3231 | * and succeeded, but before the actual hardware state is committed.
|
| 3232 | *
|
| 3233 | * For cleanup and error recovery the current state for all changed objects will
|
| 3234 | * be swapped into @state.
|
| 3235 | *
|
| 3236 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence:
|
| 3237 | *
|
| 3238 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state.
|
| 3239 | *
|
| 3240 | * 2. Do any other steps that might fail.
|
| 3241 | *
|
| 3242 | * 3. Put the staged state into the current state pointers with this function.
|
| 3243 | *
|
| 3244 | * 4. Actually commit the hardware state.
|
| 3245 | *
|
| 3246 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3
|
| 3247 | * contains the old state. Also do any other cleanup required with that state.
|
| 3248 | *
|
| 3249 | * @stall must be set when nonblocking commits for this driver directly access
|
| 3250 | * the &drm_plane.state, &drm_crtc.state or &drm_connector.state pointer. With
|
| 3251 | * the current atomic helpers this is almost always the case, since the helpers
|
| 3252 | * don't pass the right state structures to the callbacks.
|
| 3253 | *
|
| 3254 | * Returns:
|
| 3255 | * Returns 0 on success. Can return -ERESTARTSYS when @stall is true and the
|
| 3256 | * waiting for the previous commits has been interrupted.
|
| 3257 |
|
| 3258 | int drm_atomic_helper_swap_state(struct drm_atomic_commit *state,
|
| 3259 | bool stall)
|
| 3260 | {
|
| 3261 | int i, ret;
|
| 3262 | unsigned long flags = 0;
|
| 3263 | struct drm_connector *connector;
|
| 3264 | struct drm_connector_state *old_conn_state, *new_conn_state;
|
| 3265 | struct drm_crtc *crtc;
|
| 3266 | struct drm_crtc_state *old_crtc_state, *new_crtc_state;
|
| 3267 | struct drm_plane *plane;
|
| 3268 | struct drm_plane_state *old_plane_state, *new_plane_state;
|
| 3269 | struct drm_colorop *colorop;
|
| 3270 | struct drm_colorop_state *old_colorop_state, *new_colorop_state;
|
| 3271 | struct drm_crtc_commit *commit;
|
| 3272 | struct drm_private_obj *obj;
|
| 3273 | struct drm_private_state *old_obj_state, *new_obj_state;
|
| 3274 |
|
| 3275 | if (stall) {
|
| 3276 | |
| 3277 | * We have to stall for hw_done here before
|
| 3278 | * drm_atomic_helper_wait_for_dependencies() because flip
|
| 3279 | * depth > 1 is not yet supported by all drivers. As long as
|
| 3280 | * obj->state is directly dereferenced anywhere in the drivers
|
| 3281 | * atomic_commit_tail function, then it's unsafe to swap state
|
| 3282 | * before drm_atomic_helper_commit_hw_done() is called.
|
| 3283 |
|
| 3284 |
|
| 3285 | for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) {
|
| 3286 | commit = old_crtc_state->commit;
|
| 3287 |
|
| 3288 | if (!commit)
|
| 3289 | continue;
|
| 3290 |
|
| 3291 | ret = wait_for_completion_interruptible(&commit->hw_done);
|
| 3292 | if (ret)
|
| 3293 | return ret;
|
| 3294 | }
|
| 3295 |
|
| 3296 | for_each_old_connector_in_state(state, connector, old_conn_state, i) {
|
| 3297 | commit = old_conn_state->commit;
|
| 3298 |
|
| 3299 | if (!commit)
|
| 3300 | continue;
|
| 3301 |
|
| 3302 | ret = wait_for_completion_interruptible(&commit->hw_done);
|
| 3303 | if (ret)
|
| 3304 | return ret;
|
| 3305 | }
|
| 3306 |
|
| 3307 | for_each_old_plane_in_state(state, plane, old_plane_state, i) {
|
| 3308 | commit = old_plane_state->commit;
|
| 3309 |
|
| 3310 | if (!commit)
|
| 3311 | continue;
|
| 3312 |
|
| 3313 | ret = wait_for_completion_interruptible(&commit->hw_done);
|
| 3314 | if (ret)
|
| 3315 | return ret;
|
| 3316 | }
|
| 3317 | }
|
| 3318 |
|
| 3319 | for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) {
|
| 3320 | WARN_ON(connector->state != old_conn_state);
|
| 3321 |
|
| 3322 | old_conn_state->state = state;
|
| 3323 | new_conn_state->state = NULL;
|
| 3324 |
|
| 3325 | state->connectors[i].state_to_destroy = old_conn_state;
|
| 3326 | connector->state = new_conn_state;
|
| 3327 | }
|
| 3328 |
|
| 3329 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
|
| 3330 | WARN_ON(crtc->state != old_crtc_state);
|
| 3331 |
|
| 3332 | old_crtc_state->state = state;
|
| 3333 | new_crtc_state->state = NULL;
|
| 3334 |
|
| 3335 | state->crtcs[i].state_to_destroy = old_crtc_state;
|
| 3336 | crtc->state = new_crtc_state;
|
| 3337 |
|
| 3338 | if (new_crtc_state->commit) {
|
| 3339 | spin_lock(&crtc->commit_lock);
|
| 3340 | list_add(&new_crtc_state->commit->commit_entry,
|
| 3341 | &crtc->commit_list);
|
| 3342 | spin_unlock(&crtc->commit_lock);
|
| 3343 |
|
| 3344 | new_crtc_state->commit->event = NULL;
|
| 3345 | }
|
| 3346 | }
|
| 3347 |
|
| 3348 | for_each_oldnew_colorop_in_state(state, colorop, old_colorop_state, new_colorop_state, i) {
|
| 3349 | WARN_ON(colorop->state != old_colorop_state);
|
| 3350 |
|
| 3351 | old_colorop_state->state = state;
|
| 3352 | new_colorop_state->state = NULL;
|
| 3353 |
|
| 3354 | state->colorops[i].state = old_colorop_state;
|
| 3355 | colorop->state = new_colorop_state;
|
| 3356 | }
|
| 3357 |
|
| 3358 | drm_panic_lock(state->dev, flags);
|
| 3359 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
|
| 3360 | WARN_ON(plane->state != old_plane_state);
|
| 3361 |
|
| 3362 | old_plane_state->state = state;
|
| 3363 | new_plane_state->state = NULL;
|
| 3364 |
|
| 3365 | state->planes[i].state_to_destroy = old_plane_state;
|
| 3366 | plane->state = new_plane_state;
|
| 3367 | }
|
| 3368 | drm_panic_unlock(state->dev, flags);
|
| 3369 |
|
| 3370 | for_each_oldnew_private_obj_in_state(state, obj, old_obj_state, new_obj_state, i) {
|
| 3371 | WARN_ON(obj->state != old_obj_state);
|
| 3372 |
|
| 3373 | old_obj_state->state = state;
|
| 3374 | new_obj_state->state = NULL;
|
| 3375 |
|
| 3376 | state->private_objs[i].state_to_destroy = old_obj_state;
|
| 3377 | obj->state = new_obj_state;
|
| 3378 | }
|
| 3379 |
|
| 3380 | return 0;
|
| 3381 | }
|
| 3382 | EXPORT_SYMBOL(drm_atomic_helper_swap_state);
|
| 3383 |
|
| 3384 | |
| 3385 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic
|
| 3386 | * @plane: plane object to update
|
| 3387 | * @crtc: owning CRTC of owning plane
|
| 3388 | * @fb: framebuffer to flip onto plane
|
| 3389 | * @crtc_x: x offset of primary plane on @crtc
|
| 3390 | * @crtc_y: y offset of primary plane on @crtc
|
| 3391 | * @crtc_w: width of primary plane rectangle on @crtc
|
| 3392 | * @crtc_h: height of primary plane rectangle on @crtc
|
| 3393 | * @src_x: x offset of @fb for panning
|
| 3394 | * @src_y: y offset of @fb for panning
|
| 3395 | * @src_w: width of source rectangle in @fb
|
| 3396 | * @src_h: height of source rectangle in @fb
|
| 3397 | * @ctx: lock acquire context
|
| 3398 | *
|
| 3399 | * Provides a default plane update handler using the atomic driver interface.
|
| 3400 | *
|
| 3401 | * RETURNS:
|
| 3402 | * Zero on success, error code on failure
|
| 3403 |
|
| 3404 | int drm_atomic_helper_update_plane(struct drm_plane *plane,
|
| 3405 | struct drm_crtc *crtc,
|
| 3406 | struct drm_framebuffer *fb,
|
| 3407 | int crtc_x, int crtc_y,
|
| 3408 | unsigned int crtc_w, unsigned int crtc_h,
|
| 3409 | uint32_t src_x, uint32_t src_y,
|
| 3410 | uint32_t src_w, uint32_t src_h,
|
| 3411 | struct drm_modeset_acquire_ctx *ctx)
|
| 3412 | {
|
| 3413 | struct drm_atomic_commit *state;
|
| 3414 | struct drm_plane_state *plane_state;
|
| 3415 | int ret = 0;
|
| 3416 |
|
| 3417 | state = drm_atomic_commit_alloc(plane->dev);
|
| 3418 | if (!state)
|
| 3419 | return -ENOMEM;
|
| 3420 |
|
| 3421 | state->acquire_ctx = ctx;
|
| 3422 | plane_state = drm_atomic_get_plane_state(state, plane);
|
| 3423 | if (IS_ERR(plane_state)) {
|
| 3424 | ret = PTR_ERR(plane_state);
|
| 3425 | goto fail;
|
| 3426 | }
|
| 3427 |
|
| 3428 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
|
| 3429 | if (ret != 0)
|
| 3430 | goto fail;
|
| 3431 | drm_atomic_set_fb_for_plane(plane_state, fb);
|
| 3432 | plane_state->crtc_x = crtc_x;
|
| 3433 | plane_state->crtc_y = crtc_y;
|
| 3434 | plane_state->crtc_w = crtc_w;
|
| 3435 | plane_state->crtc_h = crtc_h;
|
| 3436 | plane_state->src_x = src_x;
|
| 3437 | plane_state->src_y = src_y;
|
| 3438 | plane_state->src_w = src_w;
|
| 3439 | plane_state->src_h = src_h;
|
| 3440 |
|
| 3441 | if (plane == crtc->cursor)
|
| 3442 | state->legacy_cursor_update = true;
|
| 3443 |
|
| 3444 | ret = drm_atomic_commit(state);
|
| 3445 | fail:
|
| 3446 | drm_atomic_commit_put(state);
|
| 3447 | return ret;
|
| 3448 | }
|
| 3449 | EXPORT_SYMBOL(drm_atomic_helper_update_plane);
|
| 3450 |
|
| 3451 | |
| 3452 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using atomic
|
| 3453 | * @plane: plane to disable
|
| 3454 | * @ctx: lock acquire context
|
| 3455 | *
|
| 3456 | * Provides a default plane disable handler using the atomic driver interface.
|
| 3457 | *
|
| 3458 | * RETURNS:
|
| 3459 | * Zero on success, error code on failure
|
| 3460 |
|
| 3461 | int drm_atomic_helper_disable_plane(struct drm_plane *plane,
|
| 3462 | struct drm_modeset_acquire_ctx *ctx)
|
| 3463 | {
|
| 3464 | struct drm_atomic_commit *state;
|
| 3465 | struct drm_plane_state *plane_state;
|
| 3466 | int ret = 0;
|
| 3467 |
|
| 3468 | state = drm_atomic_commit_alloc(plane->dev);
|
| 3469 | if (!state)
|
| 3470 | return -ENOMEM;
|
| 3471 |
|
| 3472 | state->acquire_ctx = ctx;
|
| 3473 | plane_state = drm_atomic_get_plane_state(state, plane);
|
| 3474 | if (IS_ERR(plane_state)) {
|
| 3475 | ret = PTR_ERR(plane_state);
|
| 3476 | goto fail;
|
| 3477 | }
|
| 3478 |
|
| 3479 | if (plane_state->crtc && plane_state->crtc->cursor == plane)
|
| 3480 | plane_state->state->legacy_cursor_update = true;
|
| 3481 |
|
| 3482 | ret = __drm_atomic_helper_disable_plane(plane, plane_state);
|
| 3483 | if (ret != 0)
|
| 3484 | goto fail;
|
| 3485 |
|
| 3486 | ret = drm_atomic_commit(state);
|
| 3487 | fail:
|
| 3488 | drm_atomic_commit_put(state);
|
| 3489 | return ret;
|
| 3490 | }
|
| 3491 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane);
|
| 3492 |
|
| 3493 | |
| 3494 | * drm_atomic_helper_set_config - set a new config from userspace
|
| 3495 | * @set: mode set configuration
|
| 3496 | * @ctx: lock acquisition context
|
| 3497 | *
|
| 3498 | * Provides a default CRTC set_config handler using the atomic driver interface.
|
| 3499 | *
|
| 3500 | * NOTE: For backwards compatibility with old userspace this automatically
|
| 3501 | * resets the "link-status" property to GOOD, to force any link
|
| 3502 | * re-training. The SETCRTC ioctl does not define whether an update does
|
| 3503 | * need a full modeset or just a plane update, hence we're allowed to do
|
| 3504 | * that. See also drm_connector_set_link_status_property().
|
| 3505 | *
|
| 3506 | * Returns:
|
| 3507 | * Returns 0 on success, negative errno numbers on failure.
|
| 3508 |
|
| 3509 | int drm_atomic_helper_set_config(struct drm_mode_set *set,
|
| 3510 | struct drm_modeset_acquire_ctx *ctx)
|
| 3511 | {
|
| 3512 | struct drm_atomic_commit *state;
|
| 3513 | struct drm_crtc *crtc = set->crtc;
|
| 3514 | int ret = 0;
|
| 3515 |
|
| 3516 | state = drm_atomic_commit_alloc(crtc->dev);
|
| 3517 | if (!state)
|
| 3518 | return -ENOMEM;
|
| 3519 |
|
| 3520 | state->acquire_ctx = ctx;
|
| 3521 | ret = __drm_atomic_helper_set_config(set, state);
|
| 3522 | if (ret != 0)
|
| 3523 | goto fail;
|
| 3524 |
|
| 3525 | ret = handle_conflicting_encoders(state, true);
|
| 3526 | if (ret)
|
| 3527 | goto fail;
|
| 3528 |
|
| 3529 | ret = drm_atomic_commit(state);
|
| 3530 |
|
| 3531 | fail:
|
| 3532 | drm_atomic_commit_put(state);
|
| 3533 | return ret;
|
| 3534 | }
|
| 3535 | EXPORT_SYMBOL(drm_atomic_helper_set_config);
|
| 3536 |
|
| 3537 | |
| 3538 | * drm_atomic_helper_disable_all - disable all currently active outputs
|
| 3539 | * @dev: DRM device
|
| 3540 | * @ctx: lock acquisition context
|
| 3541 | *
|
| 3542 | * Loops through all connectors, finding those that aren't turned off and then
|
| 3543 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC
|
| 3544 | * that they are connected to.
|
| 3545 | *
|
| 3546 | * This is used for example in suspend/resume to disable all currently active
|
| 3547 | * functions when suspending. If you just want to shut down everything at e.g.
|
| 3548 | * driver unload, look at drm_atomic_helper_shutdown().
|
| 3549 | *
|
| 3550 | * Note that if callers haven't already acquired all modeset locks this might
|
| 3551 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
|
| 3552 | *
|
| 3553 | * Returns:
|
| 3554 | * 0 on success or a negative error code on failure.
|
| 3555 | *
|
| 3556 | * See also:
|
| 3557 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() and
|
| 3558 | * drm_atomic_helper_shutdown().
|
| 3559 |
|
| 3560 | int drm_atomic_helper_disable_all(struct drm_device *dev,
|
| 3561 | struct drm_modeset_acquire_ctx *ctx)
|
| 3562 | {
|
| 3563 | struct drm_atomic_commit *state;
|
| 3564 | struct drm_connector_state *conn_state;
|
| 3565 | struct drm_connector *conn;
|
| 3566 | struct drm_plane_state *plane_state;
|
| 3567 | struct drm_plane *plane;
|
| 3568 | struct drm_crtc_state *crtc_state;
|
| 3569 | struct drm_crtc *crtc;
|
| 3570 | int ret, i;
|
| 3571 |
|
| 3572 | state = drm_atomic_commit_alloc(dev);
|
| 3573 | if (!state)
|
| 3574 | return -ENOMEM;
|
| 3575 |
|
| 3576 | state->acquire_ctx = ctx;
|
| 3577 |
|
| 3578 | drm_for_each_crtc(crtc, dev) {
|
| 3579 | crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
| 3580 | if (IS_ERR(crtc_state)) {
|
| 3581 | ret = PTR_ERR(crtc_state);
|
| 3582 | goto free;
|
| 3583 | }
|
| 3584 |
|
| 3585 | crtc_state->active = false;
|
| 3586 |
|
| 3587 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, NULL);
|
| 3588 | if (ret < 0)
|
| 3589 | goto free;
|
| 3590 |
|
| 3591 | ret = drm_atomic_add_affected_planes(state, crtc);
|
| 3592 | if (ret < 0)
|
| 3593 | goto free;
|
| 3594 |
|
| 3595 | ret = drm_atomic_add_affected_connectors(state, crtc);
|
| 3596 | if (ret < 0)
|
| 3597 | goto free;
|
| 3598 | }
|
| 3599 |
|
| 3600 | for_each_new_connector_in_state(state, conn, conn_state, i) {
|
| 3601 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL);
|
| 3602 | if (ret < 0)
|
| 3603 | goto free;
|
| 3604 | }
|
| 3605 |
|
| 3606 | for_each_new_plane_in_state(state, plane, plane_state, i) {
|
| 3607 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
|
| 3608 | if (ret < 0)
|
| 3609 | goto free;
|
| 3610 |
|
| 3611 | drm_atomic_set_fb_for_plane(plane_state, NULL);
|
| 3612 | }
|
| 3613 |
|
| 3614 | ret = drm_atomic_commit(state);
|
| 3615 | free:
|
| 3616 | drm_atomic_commit_put(state);
|
| 3617 | return ret;
|
| 3618 | }
|
| 3619 | EXPORT_SYMBOL(drm_atomic_helper_disable_all);
|
| 3620 |
|
| 3621 | |
| 3622 | * drm_atomic_helper_reset_crtc - reset the active outputs of a CRTC
|
| 3623 | * @crtc: DRM CRTC
|
| 3624 | * @ctx: lock acquisition context
|
| 3625 | *
|
| 3626 | * Reset the active outputs by indicating that connectors have changed.
|
| 3627 | * This implies a reset of all active components available between the CRTC and
|
| 3628 | * connectors.
|
| 3629 | *
|
| 3630 | * A variant of this function exists with
|
| 3631 | * drm_bridge_helper_reset_crtc(), dedicated to bridges.
|
| 3632 | *
|
| 3633 | * NOTE: This relies on resetting &drm_crtc_state.connectors_changed.
|
| 3634 | * For drivers which optimize out unnecessary modesets this will result in
|
| 3635 | * a no-op commit, achieving nothing.
|
| 3636 | *
|
| 3637 | * Returns:
|
| 3638 | * 0 on success or a negative error code on failure.
|
| 3639 |
|
| 3640 | int drm_atomic_helper_reset_crtc(struct drm_crtc *crtc,
|
| 3641 | struct drm_modeset_acquire_ctx *ctx)
|
| 3642 | {
|
| 3643 | struct drm_atomic_commit *state;
|
| 3644 | struct drm_crtc_state *crtc_state;
|
| 3645 | int ret;
|
| 3646 |
|
| 3647 | state = drm_atomic_commit_alloc(crtc->dev);
|
| 3648 | if (!state)
|
| 3649 | return -ENOMEM;
|
| 3650 |
|
| 3651 | state->acquire_ctx = ctx;
|
| 3652 |
|
| 3653 | crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
| 3654 | if (IS_ERR(crtc_state)) {
|
| 3655 | ret = PTR_ERR(crtc_state);
|
| 3656 | goto out;
|
| 3657 | }
|
| 3658 |
|
| 3659 | crtc_state->connectors_changed = true;
|
| 3660 |
|
| 3661 | ret = drm_atomic_commit(state);
|
| 3662 | out:
|
| 3663 | drm_atomic_commit_put(state);
|
| 3664 |
|
| 3665 | return ret;
|
| 3666 | }
|
| 3667 | EXPORT_SYMBOL(drm_atomic_helper_reset_crtc);
|
| 3668 |
|
| 3669 | |
| 3670 | * drm_atomic_helper_shutdown - shutdown all CRTC
|
| 3671 | * @dev: DRM device
|
| 3672 | *
|
| 3673 | * This shuts down all CRTC, which is useful for driver unloading. Shutdown on
|
| 3674 | * suspend should instead be handled with drm_atomic_helper_suspend(), since
|
| 3675 | * that also takes a snapshot of the modeset state to be restored on resume.
|
| 3676 | *
|
| 3677 | * This is just a convenience wrapper around drm_atomic_helper_disable_all(),
|
| 3678 | * and it is the atomic version of drm_helper_force_disable_all().
|
| 3679 |
|
| 3680 | void drm_atomic_helper_shutdown(struct drm_device *dev)
|
| 3681 | {
|
| 3682 | struct drm_modeset_acquire_ctx ctx;
|
| 3683 | int ret;
|
| 3684 |
|
| 3685 | if (dev == NULL)
|
| 3686 | return;
|
| 3687 |
|
| 3688 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
|
| 3689 |
|
| 3690 | ret = drm_atomic_helper_disable_all(dev, &ctx);
|
| 3691 | if (ret)
|
| 3692 | drm_err(dev,
|
| 3693 | "Disabling all crtc's during unload failed with %i\n",
|
| 3694 | ret);
|
| 3695 |
|
| 3696 | DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
|
| 3697 | }
|
| 3698 | EXPORT_SYMBOL(drm_atomic_helper_shutdown);
|
| 3699 |
|
| 3700 | |
| 3701 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object
|
| 3702 | * @dev: DRM device
|
| 3703 | * @ctx: lock acquisition context
|
| 3704 | *
|
| 3705 | * Makes a copy of the current atomic state by looping over all objects and
|
| 3706 | * duplicating their respective states. This is used for example by suspend/
|
| 3707 | * resume support code to save the state prior to suspend such that it can
|
| 3708 | * be restored upon resume.
|
| 3709 | *
|
| 3710 | * Note that this treats atomic state as persistent between save and restore.
|
| 3711 | * Drivers must make sure that this is possible and won't result in confusion
|
| 3712 | * or erroneous behaviour.
|
| 3713 | *
|
| 3714 | * Note that if callers haven't already acquired all modeset locks this might
|
| 3715 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
|
| 3716 | *
|
| 3717 | * Returns:
|
| 3718 | * A pointer to the copy of the atomic state object on success or an
|
| 3719 | * ERR_PTR()-encoded error code on failure.
|
| 3720 | *
|
| 3721 | * See also:
|
| 3722 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume()
|
| 3723 |
|
| 3724 | struct drm_atomic_commit *
|
| 3725 | drm_atomic_helper_duplicate_state(struct drm_device *dev,
|
| 3726 | struct drm_modeset_acquire_ctx *ctx)
|
| 3727 | {
|
| 3728 | struct drm_atomic_commit *state;
|
| 3729 | struct drm_connector *conn;
|
| 3730 | struct drm_connector_list_iter conn_iter;
|
| 3731 | struct drm_plane *plane;
|
| 3732 | struct drm_crtc *crtc;
|
| 3733 | int err = 0;
|
| 3734 |
|
| 3735 | state = drm_atomic_commit_alloc(dev);
|
| 3736 | if (!state)
|
| 3737 | return ERR_PTR(-ENOMEM);
|
| 3738 |
|
| 3739 | state->acquire_ctx = ctx;
|
| 3740 | state->duplicated = true;
|
| 3741 |
|
| 3742 | drm_for_each_crtc(crtc, dev) {
|
| 3743 | struct drm_crtc_state *crtc_state;
|
| 3744 |
|
| 3745 | crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
| 3746 | if (IS_ERR(crtc_state)) {
|
| 3747 | err = PTR_ERR(crtc_state);
|
| 3748 | goto free;
|
| 3749 | }
|
| 3750 | }
|
| 3751 |
|
| 3752 | drm_for_each_plane(plane, dev) {
|
| 3753 | struct drm_plane_state *plane_state;
|
| 3754 |
|
| 3755 | plane_state = drm_atomic_get_plane_state(state, plane);
|
| 3756 | if (IS_ERR(plane_state)) {
|
| 3757 | err = PTR_ERR(plane_state);
|
| 3758 | goto free;
|
| 3759 | }
|
| 3760 |
|
| 3761 | if (plane_state->color_pipeline) {
|
| 3762 | err = drm_atomic_add_affected_colorops(state, plane);
|
| 3763 | if (err)
|
| 3764 | goto free;
|
| 3765 | }
|
| 3766 |
|
| 3767 | }
|
| 3768 |
|
| 3769 | drm_connector_list_iter_begin(dev, &conn_iter);
|
| 3770 | drm_for_each_connector_iter(conn, &conn_iter) {
|
| 3771 | struct drm_connector_state *conn_state;
|
| 3772 |
|
| 3773 | conn_state = drm_atomic_get_connector_state(state, conn);
|
| 3774 | if (IS_ERR(conn_state)) {
|
| 3775 | err = PTR_ERR(conn_state);
|
| 3776 | drm_connector_list_iter_end(&conn_iter);
|
| 3777 | goto free;
|
| 3778 | }
|
| 3779 | }
|
| 3780 | drm_connector_list_iter_end(&conn_iter);
|
| 3781 |
|
| 3782 |
|
| 3783 | state->acquire_ctx = NULL;
|
| 3784 |
|
| 3785 | free:
|
| 3786 | if (err < 0) {
|
| 3787 | drm_atomic_commit_put(state);
|
| 3788 | state = ERR_PTR(err);
|
| 3789 | }
|
| 3790 |
|
| 3791 | return state;
|
| 3792 | }
|
| 3793 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state);
|
| 3794 |
|
| 3795 | |
| 3796 | * drm_atomic_helper_suspend - subsystem-level suspend helper
|
| 3797 | * @dev: DRM device
|
| 3798 | *
|
| 3799 | * Duplicates the current atomic state, disables all active outputs and then
|
| 3800 | * returns a pointer to the original atomic state to the caller. Drivers can
|
| 3801 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to
|
| 3802 | * restore the output configuration that was active at the time the system
|
| 3803 | * entered suspend.
|
| 3804 | *
|
| 3805 | * Note that it is potentially unsafe to use this. The atomic state object
|
| 3806 | * returned by this function is assumed to be persistent. Drivers must ensure
|
| 3807 | * that this holds true. Before calling this function, drivers must make sure
|
| 3808 | * to suspend fbdev emulation so that nothing can be using the device.
|
| 3809 | *
|
| 3810 | * Returns:
|
| 3811 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()-
|
| 3812 | * encoded error code on failure. Drivers should store the returned atomic
|
| 3813 | * state object and pass it to the drm_atomic_helper_resume() helper upon
|
| 3814 | * resume.
|
| 3815 | *
|
| 3816 | * See also:
|
| 3817 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(),
|
| 3818 | * drm_atomic_helper_resume(), drm_atomic_helper_commit_duplicated_state()
|
| 3819 |
|
| 3820 | struct drm_atomic_commit *drm_atomic_helper_suspend(struct drm_device *dev)
|
| 3821 | {
|
| 3822 | struct drm_modeset_acquire_ctx ctx;
|
| 3823 | struct drm_atomic_commit *state;
|
| 3824 | int err;
|
| 3825 |
|
| 3826 |
|
| 3827 | state = ERR_PTR(-EINVAL);
|
| 3828 |
|
| 3829 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err);
|
| 3830 |
|
| 3831 | state = drm_atomic_helper_duplicate_state(dev, &ctx);
|
| 3832 | if (IS_ERR(state))
|
| 3833 | goto unlock;
|
| 3834 |
|
| 3835 | err = drm_atomic_helper_disable_all(dev, &ctx);
|
| 3836 | if (err < 0) {
|
| 3837 | drm_atomic_commit_put(state);
|
| 3838 | state = ERR_PTR(err);
|
| 3839 | goto unlock;
|
| 3840 | }
|
| 3841 |
|
| 3842 | unlock:
|
| 3843 | DRM_MODESET_LOCK_ALL_END(dev, ctx, err);
|
| 3844 | if (err)
|
| 3845 | return ERR_PTR(err);
|
| 3846 |
|
| 3847 | return state;
|
| 3848 | }
|
| 3849 | EXPORT_SYMBOL(drm_atomic_helper_suspend);
|
| 3850 |
|
| 3851 | |
| 3852 | * drm_atomic_helper_commit_duplicated_state - commit duplicated state
|
| 3853 | * @state: duplicated atomic state to commit
|
| 3854 | * @ctx: pointer to acquire_ctx to use for commit.
|
| 3855 | *
|
| 3856 | * The state returned by drm_atomic_helper_duplicate_state() and
|
| 3857 | * drm_atomic_helper_suspend() is partially invalid, and needs to
|
| 3858 | * be fixed up before commit.
|
| 3859 | *
|
| 3860 | * Returns:
|
| 3861 | * 0 on success or a negative error code on failure.
|
| 3862 | *
|
| 3863 | * See also:
|
| 3864 | * drm_atomic_helper_suspend()
|
| 3865 |
|
| 3866 | int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_commit *state,
|
| 3867 | struct drm_modeset_acquire_ctx *ctx)
|
| 3868 | {
|
| 3869 | int i, ret;
|
| 3870 | struct drm_plane *plane;
|
| 3871 | struct drm_plane_state *new_plane_state;
|
| 3872 | struct drm_colorop *colorop;
|
| 3873 | struct drm_colorop_state *new_colorop_state;
|
| 3874 | struct drm_connector *connector;
|
| 3875 | struct drm_connector_state *new_conn_state;
|
| 3876 | struct drm_crtc *crtc;
|
| 3877 | struct drm_crtc_state *new_crtc_state;
|
| 3878 |
|
| 3879 | state->acquire_ctx = ctx;
|
| 3880 |
|
| 3881 | for_each_new_colorop_in_state(state, colorop, new_colorop_state, i)
|
| 3882 | state->colorops[i].old_state = colorop->state;
|
| 3883 |
|
| 3884 | for_each_new_plane_in_state(state, plane, new_plane_state, i)
|
| 3885 | state->planes[i].old_state = plane->state;
|
| 3886 |
|
| 3887 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i)
|
| 3888 | state->crtcs[i].old_state = crtc->state;
|
| 3889 |
|
| 3890 | for_each_new_connector_in_state(state, connector, new_conn_state, i)
|
| 3891 | state->connectors[i].old_state = connector->state;
|
| 3892 |
|
| 3893 | ret = drm_atomic_commit(state);
|
| 3894 |
|
| 3895 | state->acquire_ctx = NULL;
|
| 3896 |
|
| 3897 | return ret;
|
| 3898 | }
|
| 3899 | EXPORT_SYMBOL(drm_atomic_helper_commit_duplicated_state);
|
| 3900 |
|
| 3901 | |
| 3902 | * drm_atomic_helper_resume - subsystem-level resume helper
|
| 3903 | * @dev: DRM device
|
| 3904 | * @state: atomic state to resume to
|
| 3905 | *
|
| 3906 | * Calls drm_mode_config_reset() to synchronize hardware and software states,
|
| 3907 | * grabs all modeset locks and commits the atomic state object. This can be
|
| 3908 | * used in conjunction with the drm_atomic_helper_suspend() helper to
|
| 3909 | * implement suspend/resume for drivers that support atomic mode-setting.
|
| 3910 | *
|
| 3911 | * Returns:
|
| 3912 | * 0 on success or a negative error code on failure.
|
| 3913 | *
|
| 3914 | * See also:
|
| 3915 | * drm_atomic_helper_suspend()
|
| 3916 |
|
| 3917 | int drm_atomic_helper_resume(struct drm_device *dev,
|
| 3918 | struct drm_atomic_commit *state)
|
| 3919 | {
|
| 3920 | struct drm_modeset_acquire_ctx ctx;
|
| 3921 | int err;
|
| 3922 |
|
| 3923 | drm_mode_config_reset(dev);
|
| 3924 |
|
| 3925 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err);
|
| 3926 |
|
| 3927 | err = drm_atomic_helper_commit_duplicated_state(state, &ctx);
|
| 3928 |
|
| 3929 | DRM_MODESET_LOCK_ALL_END(dev, ctx, err);
|
| 3930 | drm_atomic_commit_put(state);
|
| 3931 |
|
| 3932 | return err;
|
| 3933 | }
|
| 3934 | EXPORT_SYMBOL(drm_atomic_helper_resume);
|
| 3935 |
|
| 3936 | static int page_flip_common(struct drm_atomic_commit *state,
|
| 3937 | struct drm_crtc *crtc,
|
| 3938 | struct drm_framebuffer *fb,
|
| 3939 | struct drm_pending_vblank_event *event,
|
| 3940 | uint32_t flags)
|
| 3941 | {
|
| 3942 | struct drm_plane *plane = crtc->primary;
|
| 3943 | struct drm_plane_state *plane_state;
|
| 3944 | struct drm_crtc_state *crtc_state;
|
| 3945 | int ret = 0;
|
| 3946 |
|
| 3947 | crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
| 3948 | if (IS_ERR(crtc_state))
|
| 3949 | return PTR_ERR(crtc_state);
|
| 3950 |
|
| 3951 | crtc_state->event = event;
|
| 3952 | crtc_state->async_flip = flags & DRM_MODE_PAGE_FLIP_ASYNC;
|
| 3953 |
|
| 3954 | plane_state = drm_atomic_get_plane_state(state, plane);
|
| 3955 | if (IS_ERR(plane_state))
|
| 3956 | return PTR_ERR(plane_state);
|
| 3957 |
|
| 3958 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
|
| 3959 | if (ret != 0)
|
| 3960 | return ret;
|
| 3961 | drm_atomic_set_fb_for_plane(plane_state, fb);
|
| 3962 |
|
| 3963 |
|
| 3964 | state->allow_modeset = false;
|
| 3965 | if (!crtc_state->active) {
|
| 3966 | drm_dbg_atomic(crtc->dev,
|
| 3967 | "[CRTC:%d:%s] disabled, rejecting legacy flip\n",
|
| 3968 | crtc->base.id, crtc->name);
|
| 3969 | return -EINVAL;
|
| 3970 | }
|
| 3971 |
|
| 3972 | return ret;
|
| 3973 | }
|
| 3974 |
|
| 3975 | |
| 3976 | * drm_atomic_helper_page_flip - execute a legacy page flip
|
| 3977 | * @crtc: DRM CRTC
|
| 3978 | * @fb: DRM framebuffer
|
| 3979 | * @event: optional DRM event to signal upon completion
|
| 3980 | * @flags: flip flags for non-vblank sync'ed updates
|
| 3981 | * @ctx: lock acquisition context
|
| 3982 | *
|
| 3983 | * Provides a default &drm_crtc_funcs.page_flip implementation
|
| 3984 | * using the atomic driver interface.
|
| 3985 | *
|
| 3986 | * Returns:
|
| 3987 | * Returns 0 on success, negative errno numbers on failure.
|
| 3988 | *
|
| 3989 | * See also:
|
| 3990 | * drm_atomic_helper_page_flip_target()
|
| 3991 |
|
| 3992 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
|
| 3993 | struct drm_framebuffer *fb,
|
| 3994 | struct drm_pending_vblank_event *event,
|
| 3995 | uint32_t flags,
|
| 3996 | struct drm_modeset_acquire_ctx *ctx)
|
| 3997 | {
|
| 3998 | struct drm_plane *plane = crtc->primary;
|
| 3999 | struct drm_atomic_commit *state;
|
| 4000 | int ret = 0;
|
| 4001 |
|
| 4002 | state = drm_atomic_commit_alloc(plane->dev);
|
| 4003 | if (!state)
|
| 4004 | return -ENOMEM;
|
| 4005 |
|
| 4006 | state->acquire_ctx = ctx;
|
| 4007 |
|
| 4008 | ret = page_flip_common(state, crtc, fb, event, flags);
|
| 4009 | if (ret != 0)
|
| 4010 | goto fail;
|
| 4011 |
|
| 4012 | ret = drm_atomic_nonblocking_commit(state);
|
| 4013 | fail:
|
| 4014 | drm_atomic_commit_put(state);
|
| 4015 | return ret;
|
| 4016 | }
|
| 4017 | EXPORT_SYMBOL(drm_atomic_helper_page_flip);
|
| 4018 |
|
| 4019 | |
| 4020 | * drm_atomic_helper_page_flip_target - do page flip on target vblank period.
|
| 4021 | * @crtc: DRM CRTC
|
| 4022 | * @fb: DRM framebuffer
|
| 4023 | * @event: optional DRM event to signal upon completion
|
| 4024 | * @flags: flip flags for non-vblank sync'ed updates
|
| 4025 | * @target: specifying the target vblank period when the flip to take effect
|
| 4026 | * @ctx: lock acquisition context
|
| 4027 | *
|
| 4028 | * Provides a default &drm_crtc_funcs.page_flip_target implementation.
|
| 4029 | * Similar to drm_atomic_helper_page_flip() with extra parameter to specify
|
| 4030 | * target vblank period to flip.
|
| 4031 | *
|
| 4032 | * Returns:
|
| 4033 | * Returns 0 on success, negative errno numbers on failure.
|
| 4034 |
|
| 4035 | int drm_atomic_helper_page_flip_target(struct drm_crtc *crtc,
|
| 4036 | struct drm_framebuffer *fb,
|
| 4037 | struct drm_pending_vblank_event *event,
|
| 4038 | uint32_t flags,
|
| 4039 | uint32_t target,
|
| 4040 | struct drm_modeset_acquire_ctx *ctx)
|
| 4041 | {
|
| 4042 | struct drm_plane *plane = crtc->primary;
|
| 4043 | struct drm_atomic_commit *state;
|
| 4044 | struct drm_crtc_state *crtc_state;
|
| 4045 | int ret = 0;
|
| 4046 |
|
| 4047 | state = drm_atomic_commit_alloc(plane->dev);
|
| 4048 | if (!state)
|
| 4049 | return -ENOMEM;
|
| 4050 |
|
| 4051 | state->acquire_ctx = ctx;
|
| 4052 |
|
| 4053 | ret = page_flip_common(state, crtc, fb, event, flags);
|
| 4054 | if (ret != 0)
|
| 4055 | goto fail;
|
| 4056 |
|
| 4057 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
|
| 4058 | if (WARN_ON(!crtc_state)) {
|
| 4059 | ret = -EINVAL;
|
| 4060 | goto fail;
|
| 4061 | }
|
| 4062 | crtc_state->target_vblank = target;
|
| 4063 |
|
| 4064 | ret = drm_atomic_nonblocking_commit(state);
|
| 4065 | fail:
|
| 4066 | drm_atomic_commit_put(state);
|
| 4067 | return ret;
|
| 4068 | }
|
| 4069 | EXPORT_SYMBOL(drm_atomic_helper_page_flip_target);
|
| 4070 |
|
| 4071 | |
| 4072 | * drm_atomic_helper_bridge_propagate_bus_fmt() - Propagate output format to
|
| 4073 | * the input end of a bridge
|
| 4074 | * @bridge: bridge control structure
|
| 4075 | * @bridge_state: new bridge state
|
| 4076 | * @crtc_state: new CRTC state
|
| 4077 | * @conn_state: new connector state
|
| 4078 | * @output_fmt: tested output bus format
|
| 4079 | * @num_input_fmts: will contain the size of the returned array
|
| 4080 | *
|
| 4081 | * This helper is a pluggable implementation of the
|
| 4082 | * &drm_bridge_funcs.atomic_get_input_bus_fmts operation for bridges that don't
|
| 4083 | * modify the bus configuration between their input and their output. It
|
| 4084 | * returns an array of input formats with a single element set to @output_fmt.
|
| 4085 | *
|
| 4086 | * RETURNS:
|
| 4087 | * a valid format array of size @num_input_fmts, or NULL if the allocation
|
| 4088 | * failed
|
| 4089 |
|
| 4090 | u32 *
|
| 4091 | drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge,
|
| 4092 | struct drm_bridge_state *bridge_state,
|
| 4093 | struct drm_crtc_state *crtc_state,
|
| 4094 | struct drm_connector_state *conn_state,
|
| 4095 | u32 output_fmt,
|
| 4096 | unsigned int *num_input_fmts)
|
| 4097 | {
|
| 4098 | u32 *input_fmts;
|
| 4099 |
|
| 4100 | input_fmts = kzalloc_obj(*input_fmts);
|
| 4101 | if (!input_fmts) {
|
| 4102 | *num_input_fmts = 0;
|
| 4103 | return NULL;
|
| 4104 | }
|
| 4105 |
|
| 4106 | *num_input_fmts = 1;
|
| 4107 | input_fmts[0] = output_fmt;
|
| 4108 | return input_fmts;
|
| 4109 | }
|
| 4110 | EXPORT_SYMBOL(drm_atomic_helper_bridge_propagate_bus_fmt);
|
| 4111 |
|
| 4112 | |
| 4113 | * drm_atomic_helper_bridge_get_hdmi_output_bus_fmts - helper implementing
|
| 4114 | * atomic_get_output_bus_fmts for HDMI
|
| 4115 | * @bridge: pointer to &struct drm_bridge
|
| 4116 | * @bridge_state: pointer to the current bridge state
|
| 4117 | * @crtc_state: pointer to the current CRTC state
|
| 4118 | * @conn_state: pointer to the current connector state
|
| 4119 | * @num_output_fmts: pointer to where the number of entries in the returned array
|
| 4120 | * will be stored. Set to 0 if unsuccessful.
|
| 4121 | *
|
| 4122 | * Common implementation for the &drm_bridge_funcs.atomic_get_output_bus_fmts
|
| 4123 | * operation that's applicable to HDMI connectors.
|
| 4124 | *
|
| 4125 | * Returns: a newly allocated array of u32 values of length \*@num_output_fmts,
|
| 4126 | * representing all the MEDIA_BUS_FMTS\_ for the current connector state's
|
| 4127 | * chosen HDMI output bits per compoennt, or %NULL if it fails to allocate one.
|
| 4128 |
|
| 4129 | u32 *
|
| 4130 | drm_atomic_helper_bridge_get_hdmi_output_bus_fmts(struct drm_bridge *bridge,
|
| 4131 | struct drm_bridge_state *bridge_state,
|
| 4132 | struct drm_crtc_state *crtc_state,
|
| 4133 | struct drm_connector_state *conn_state,
|
| 4134 | unsigned int *num_output_fmts)
|
| 4135 | {
|
| 4136 | unsigned int num_fmts = 0;
|
| 4137 | u32 *out_fmts;
|
| 4138 |
|
| 4139 | |
| 4140 | * bridge->supported_formats is a bit field of BIT(enum drm_output_color_format)
|
| 4141 | * values. The smallest hweight that is smaller than or equal to
|
| 4142 | * %DRM_OUTPUT_COLOR_FORMAT_COUNT will do for counting set bits here.
|
| 4143 |
|
| 4144 | BUILD_BUG_ON(const_true(DRM_OUTPUT_COLOR_FORMAT_COUNT > 8));
|
| 4145 | out_fmts = kmalloc_array(hweight8(bridge->supported_formats),
|
| 4146 | sizeof(u32), GFP_KERNEL);
|
| 4147 | if (!out_fmts) {
|
| 4148 | *num_output_fmts = 0;
|
| 4149 | return NULL;
|
| 4150 | }
|
| 4151 |
|
| 4152 | switch (conn_state->hdmi.output_bpc) {
|
| 4153 | case 12:
|
| 4154 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_RGB444))
|
| 4155 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_RGB121212_1X36;
|
| 4156 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_YCBCR444))
|
| 4157 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_YUV12_1X36;
|
| 4158 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_YCBCR422))
|
| 4159 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_UYVY12_1X24;
|
| 4160 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_YCBCR420))
|
| 4161 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_UYYVYY12_0_5X36;
|
| 4162 | break;
|
| 4163 | case 10:
|
| 4164 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_RGB444))
|
| 4165 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_RGB101010_1X30;
|
| 4166 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_YCBCR444))
|
| 4167 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_YUV10_1X30;
|
| 4168 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_YCBCR422))
|
| 4169 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_UYVY10_1X20;
|
| 4170 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_YCBCR420))
|
| 4171 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_UYYVYY10_0_5X30;
|
| 4172 | break;
|
| 4173 | default:
|
| 4174 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_RGB444))
|
| 4175 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_RGB888_1X24;
|
| 4176 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_YCBCR444))
|
| 4177 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_YUV8_1X24;
|
| 4178 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_YCBCR422))
|
| 4179 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_UYVY8_1X16;
|
| 4180 | if (bridge->supported_formats & BIT(DRM_OUTPUT_COLOR_FORMAT_YCBCR420))
|
| 4181 | out_fmts[num_fmts++] = MEDIA_BUS_FMT_UYYVYY8_0_5X24;
|
| 4182 | break;
|
| 4183 | }
|
| 4184 |
|
| 4185 | *num_output_fmts = num_fmts;
|
| 4186 |
|
| 4187 | return out_fmts;
|
| 4188 | }
|
| 4189 | EXPORT_SYMBOL(drm_atomic_helper_bridge_get_hdmi_output_bus_fmts);
|
| 4190 |
|