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| 2 | |
| 3 | * Copyright (C) 2015 Texas Instruments
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| 4 | * Author: Jyri Sarha <[email protected]>
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| 5 |
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| 6 |
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| 7 | #include <drm/drm_atomic.h>
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| 8 | #include <drm/drm_atomic_helper.h>
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| 9 | #include <drm/drm_fourcc.h>
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| 10 | #include <drm/drm_framebuffer.h>
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| 11 |
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| 12 | #include "tilcdc_drv.h"
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| 13 |
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| 14 | static const struct drm_plane_funcs tilcdc_plane_funcs = {
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| 15 | .update_plane = drm_atomic_helper_update_plane,
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| 16 | .disable_plane = drm_atomic_helper_disable_plane,
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| 17 | .reset = drm_atomic_helper_plane_reset,
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| 18 | .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
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| 19 | .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
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| 20 | };
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| 21 |
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| 22 | static int tilcdc_plane_atomic_check(struct drm_plane *plane,
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| 23 | struct drm_atomic_commit *state)
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| 24 | {
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| 25 | struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
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| 26 | plane);
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| 27 | struct drm_crtc_state *crtc_state;
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| 28 | struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
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| 29 | plane);
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| 30 | unsigned int pitch;
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| 31 |
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| 32 | if (!new_state->crtc)
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| 33 | return 0;
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| 34 |
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| 35 | if (WARN_ON(!new_state->fb))
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| 36 | return -EINVAL;
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| 37 |
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| 38 | if (new_state->crtc_x || new_state->crtc_y) {
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| 39 | drm_err(plane->dev, "%s: crtc position must be zero.",
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| 40 | __func__);
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| 41 | return -EINVAL;
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| 42 | }
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| 43 |
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| 44 | crtc_state = drm_atomic_get_new_crtc_state(state, new_state->crtc);
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| 45 |
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| 46 | if (WARN_ON(!crtc_state))
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| 47 | return 0;
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| 48 |
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| 49 | if (crtc_state->mode.hdisplay != new_state->crtc_w ||
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| 50 | crtc_state->mode.vdisplay != new_state->crtc_h) {
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| 51 | drm_err(plane->dev,
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| 52 | "%s: Size must match mode (%dx%d == %dx%d)", __func__,
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| 53 | crtc_state->mode.hdisplay, crtc_state->mode.vdisplay,
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| 54 | new_state->crtc_w, new_state->crtc_h);
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| 55 | return -EINVAL;
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| 56 | }
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| 57 |
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| 58 | pitch = crtc_state->mode.hdisplay *
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| 59 | new_state->fb->format->cpp[0];
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| 60 | if (new_state->fb->pitches[0] != pitch) {
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| 61 | drm_err(plane->dev,
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| 62 | "Invalid pitch: fb and crtc widths must be the same");
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| 63 | return -EINVAL;
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| 64 | }
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| 65 |
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| 66 | if (old_state->fb && new_state->fb->format != old_state->fb->format) {
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| 67 | drm_dbg(plane->dev,
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| 68 | "%s(): pixel format change requires mode_change\n",
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| 69 | __func__);
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| 70 | crtc_state->mode_changed = true;
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| 71 | }
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| 72 |
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| 73 | return 0;
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| 74 | }
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| 75 |
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| 76 | static void tilcdc_plane_atomic_update(struct drm_plane *plane,
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| 77 | struct drm_atomic_commit *state)
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| 78 | {
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| 79 | struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
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| 80 | plane);
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| 81 |
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| 82 | if (!new_state->crtc)
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| 83 | return;
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| 84 |
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| 85 | if (WARN_ON(!new_state->fb || !new_state->crtc->state))
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| 86 | return;
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| 87 |
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| 88 | if (tilcdc_crtc_update_fb(new_state->crtc,
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| 89 | new_state->fb,
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| 90 | new_state->crtc->state->event) == 0) {
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| 91 | new_state->crtc->state->event = NULL;
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| 92 | }
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| 93 | }
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| 94 |
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| 95 | static const struct drm_plane_helper_funcs plane_helper_funcs = {
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| 96 | .atomic_check = tilcdc_plane_atomic_check,
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| 97 | .atomic_update = tilcdc_plane_atomic_update,
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| 98 | };
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| 99 |
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| 100 | struct tilcdc_plane *tilcdc_plane_init(struct drm_device *dev)
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| 101 | {
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| 102 | struct tilcdc_drm_private *priv = ddev_to_tilcdc_priv(dev);
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| 103 | struct tilcdc_plane *plane;
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| 104 |
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| 105 | plane = drmm_universal_plane_alloc(dev, struct tilcdc_plane, base,
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| 106 | 1, &tilcdc_plane_funcs,
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| 107 | priv->pixelformats,
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| 108 | priv->num_pixelformats,
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| 109 | NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
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| 110 | if (IS_ERR(plane))
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| 111 | return plane;
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| 112 |
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| 113 | drm_plane_helper_add(&plane->base, &plane_helper_funcs);
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| 114 |
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| 115 | return plane;
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| 116 | }
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