| 1 | |
| 2 | |
| 3 | * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
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| 4 |
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| 5 |
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| 6 | #define pr_fmt(fmt)"[drm-dp] %s: " fmt, __func__
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| 7 |
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| 8 | #ifdef CONFIG_DEBUG_FS
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| 9 |
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| 10 | #include <linux/debugfs.h>
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| 11 | #include <drm/drm_connector.h>
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| 12 | #include <drm/drm_file.h>
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| 13 |
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| 14 | #include "dp_aux.h"
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| 15 | #include "dp_ctrl.h"
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| 16 | #include "dp_debug.h"
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| 17 | #include "dp_display.h"
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| 18 |
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| 19 | #define DEBUG_NAME "msm_dp"
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| 20 |
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| 21 | struct msm_dp_debug_private {
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| 22 | struct msm_dp_link *link;
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| 23 | struct msm_dp_panel *panel;
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| 24 | struct drm_connector *connector;
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| 25 | };
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| 26 |
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| 27 | static int msm_dp_debug_show(struct seq_file *seq, void *p)
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| 28 | {
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| 29 | struct msm_dp_debug_private *debug = seq->private;
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| 30 | u64 lclk = 0;
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| 31 | u32 link_params_rate;
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| 32 | const struct drm_display_mode *drm_mode;
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| 33 |
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| 34 | if (!debug)
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| 35 | return -ENODEV;
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| 36 |
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| 37 | drm_mode = &debug->panel->msm_dp_mode.drm_mode;
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| 38 |
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| 39 | seq_printf(seq, "\tname = %s\n", DEBUG_NAME);
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| 40 | seq_printf(seq, "\tdrm_dp_link\n\t\trate = %u\n",
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| 41 | debug->panel->link_info.rate);
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| 42 | seq_printf(seq, "\t\tnum_lanes = %u\n",
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| 43 | debug->panel->link_info.num_lanes);
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| 44 | seq_printf(seq, "\t\tcapabilities = %lu\n",
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| 45 | debug->panel->link_info.capabilities);
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| 46 | seq_printf(seq, "\tdp_panel_info:\n\t\tactive = %dx%d\n",
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| 47 | drm_mode->hdisplay,
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| 48 | drm_mode->vdisplay);
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| 49 | seq_printf(seq, "\t\tback_porch = %dx%d\n",
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| 50 | drm_mode->htotal - drm_mode->hsync_end,
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| 51 | drm_mode->vtotal - drm_mode->vsync_end);
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| 52 | seq_printf(seq, "\t\tfront_porch = %dx%d\n",
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| 53 | drm_mode->hsync_start - drm_mode->hdisplay,
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| 54 | drm_mode->vsync_start - drm_mode->vdisplay);
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| 55 | seq_printf(seq, "\t\tsync_width = %dx%d\n",
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| 56 | drm_mode->hsync_end - drm_mode->hsync_start,
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| 57 | drm_mode->vsync_end - drm_mode->vsync_start);
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| 58 | seq_printf(seq, "\t\tactive_low = %dx%d\n",
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| 59 | debug->panel->msm_dp_mode.h_active_low,
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| 60 | debug->panel->msm_dp_mode.v_active_low);
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| 61 | seq_printf(seq, "\t\th_skew = %d\n",
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| 62 | drm_mode->hskew);
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| 63 | seq_printf(seq, "\t\trefresh rate = %d\n",
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| 64 | drm_mode_vrefresh(drm_mode));
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| 65 | seq_printf(seq, "\t\tpixel clock khz = %d\n",
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| 66 | drm_mode->clock);
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| 67 | seq_printf(seq, "\t\tbpp = %d\n",
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| 68 | debug->panel->msm_dp_mode.bpp);
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| 69 |
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| 70 |
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| 71 | seq_printf(seq, "\tdp_link:\n\t\ttest_requested = %d\n",
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| 72 | debug->link->sink_request);
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| 73 | seq_printf(seq, "\t\tnum_lanes = %d\n",
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| 74 | debug->link->link_params.num_lanes);
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| 75 | link_params_rate = debug->link->link_params.rate;
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| 76 | seq_printf(seq, "\t\tbw_code = %d\n",
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| 77 | drm_dp_link_rate_to_bw_code(link_params_rate));
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| 78 | lclk = debug->link->link_params.rate * 1000;
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| 79 | seq_printf(seq, "\t\tlclk = %lld\n", lclk);
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| 80 | seq_printf(seq, "\t\tv_level = %d\n",
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| 81 | debug->link->phy_params.v_level);
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| 82 | seq_printf(seq, "\t\tp_level = %d\n",
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| 83 | debug->link->phy_params.p_level);
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| 84 |
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| 85 | return 0;
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| 86 | }
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| 87 | DEFINE_SHOW_ATTRIBUTE(msm_dp_debug);
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| 88 |
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| 89 | static int msm_dp_test_data_show(struct seq_file *m, void *data)
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| 90 | {
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| 91 | const struct msm_dp_debug_private *debug = m->private;
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| 92 | const struct drm_connector *connector = debug->connector;
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| 93 | u32 bpc;
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| 94 |
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| 95 | if (connector->status == connector_status_connected) {
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| 96 | bpc = debug->link->test_video.test_bit_depth;
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| 97 | seq_printf(m, "hdisplay: %d\n",
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| 98 | debug->link->test_video.test_h_width);
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| 99 | seq_printf(m, "vdisplay: %d\n",
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| 100 | debug->link->test_video.test_v_height);
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| 101 | seq_printf(m, "bpc: %u\n",
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| 102 | msm_dp_link_bit_depth_to_bpp(bpc) / 3);
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| 103 | } else {
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| 104 | seq_puts(m, "0");
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| 105 | }
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| 106 |
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| 107 | return 0;
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| 108 | }
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| 109 | DEFINE_SHOW_ATTRIBUTE(msm_dp_test_data);
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| 110 |
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| 111 | static int msm_dp_test_type_show(struct seq_file *m, void *data)
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| 112 | {
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| 113 | const struct msm_dp_debug_private *debug = m->private;
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| 114 | const struct drm_connector *connector = debug->connector;
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| 115 |
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| 116 | if (connector->status == connector_status_connected)
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| 117 | seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);
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| 118 | else
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| 119 | seq_puts(m, "0");
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| 120 |
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| 121 | return 0;
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| 122 | }
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| 123 | DEFINE_SHOW_ATTRIBUTE(msm_dp_test_type);
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| 124 |
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| 125 | static ssize_t msm_dp_test_active_write(struct file *file,
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| 126 | const char __user *ubuf,
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| 127 | size_t len, loff_t *offp)
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| 128 | {
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| 129 | char *input_buffer;
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| 130 | int status = 0;
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| 131 | const struct msm_dp_debug_private *debug;
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| 132 | const struct drm_connector *connector;
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| 133 | int val = 0;
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| 134 |
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| 135 | debug = ((struct seq_file *)file->private_data)->private;
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| 136 | connector = debug->connector;
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| 137 |
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| 138 | if (len == 0)
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| 139 | return 0;
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| 140 |
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| 141 | input_buffer = memdup_user_nul(ubuf, len);
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| 142 | if (IS_ERR(input_buffer))
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| 143 | return PTR_ERR(input_buffer);
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| 144 |
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| 145 | DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);
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| 146 |
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| 147 | if (connector->status == connector_status_connected) {
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| 148 | status = kstrtoint(input_buffer, 10, &val);
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| 149 | if (status < 0) {
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| 150 | kfree(input_buffer);
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| 151 | return status;
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| 152 | }
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| 153 | DRM_DEBUG_DRIVER("Got %d for test active\n", val);
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| 154 | |
| 155 | * testing code, only accept an actual value of 1 here
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| 156 |
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| 157 | if (val == 1)
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| 158 | debug->panel->video_test = true;
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| 159 | else
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| 160 | debug->panel->video_test = false;
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| 161 | }
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| 162 | kfree(input_buffer);
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| 163 |
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| 164 | *offp += len;
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| 165 | return len;
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| 166 | }
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| 167 |
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| 168 | static int msm_dp_test_active_show(struct seq_file *m, void *data)
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| 169 | {
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| 170 | struct msm_dp_debug_private *debug = m->private;
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| 171 | struct drm_connector *connector = debug->connector;
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| 172 |
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| 173 | if (connector->status == connector_status_connected) {
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| 174 | if (debug->panel->video_test)
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| 175 | seq_puts(m, "1");
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| 176 | else
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| 177 | seq_puts(m, "0");
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| 178 | } else {
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| 179 | seq_puts(m, "0");
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| 180 | }
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| 181 |
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| 182 | return 0;
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| 183 | }
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| 184 |
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| 185 | static int msm_dp_test_active_open(struct inode *inode,
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| 186 | struct file *file)
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| 187 | {
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| 188 | return single_open(file, msm_dp_test_active_show,
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| 189 | inode->i_private);
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| 190 | }
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| 191 |
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| 192 | static const struct file_operations test_active_fops = {
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| 193 | .owner = THIS_MODULE,
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| 194 | .open = msm_dp_test_active_open,
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| 195 | .read = seq_read,
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| 196 | .llseek = seq_lseek,
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| 197 | .release = single_release,
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| 198 | .write = msm_dp_test_active_write
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| 199 | };
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| 200 |
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| 201 | int msm_dp_debug_init(struct device *dev, struct msm_dp_panel *panel,
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| 202 | struct msm_dp_link *link,
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| 203 | struct drm_connector *connector,
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| 204 | struct dentry *root, bool is_edp)
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| 205 | {
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| 206 | struct msm_dp_debug_private *debug;
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| 207 |
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| 208 | if (!dev || !panel || !link) {
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| 209 | DRM_ERROR("invalid input\n");
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| 210 | return -EINVAL;
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| 211 | }
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| 212 |
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| 213 | debug = devm_kzalloc(dev, sizeof(*debug), GFP_KERNEL);
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| 214 | if (!debug)
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| 215 | return -ENOMEM;
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| 216 |
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| 217 | debug->link = link;
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| 218 | debug->panel = panel;
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| 219 |
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| 220 | debugfs_create_file("dp_debug", 0444, root,
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| 221 | debug, &msm_dp_debug_fops);
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| 222 |
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| 223 | if (!is_edp) {
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| 224 | debugfs_create_file("dp_test_active", 0444,
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| 225 | root,
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| 226 | debug, &test_active_fops);
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| 227 |
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| 228 | debugfs_create_file("dp_test_data", 0444,
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| 229 | root,
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| 230 | debug, &msm_dp_test_data_fops);
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| 231 |
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| 232 | debugfs_create_file("dp_test_type", 0444,
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| 233 | root,
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| 234 | debug, &msm_dp_test_type_fops);
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| 235 | }
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| 236 |
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| 237 | return 0;
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| 238 | }
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| 239 |
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| 240 | #endif
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