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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.4 */5 6#define pr_fmt(fmt)"[drm-dp] %s: " fmt, __func__7 8#include <linux/debugfs.h>9#include <drm/drm_connector.h>10#include <drm/drm_file.h>11 12#include "dp_catalog.h"13#include "dp_aux.h"14#include "dp_ctrl.h"15#include "dp_debug.h"16#include "dp_display.h"17 18#define DEBUG_NAME "msm_dp"19 20struct dp_debug_private {21 struct dp_link *link;22 struct dp_panel *panel;23 struct drm_connector *connector;24};25 26static int dp_debug_show(struct seq_file *seq, void *p)27{28 struct dp_debug_private *debug = seq->private;29 u64 lclk = 0;30 u32 link_params_rate;31 const struct drm_display_mode *drm_mode;32 33 if (!debug)34 return -ENODEV;35 36 drm_mode = &debug->panel->dp_mode.drm_mode;37 38 seq_printf(seq, "\tname = %s\n", DEBUG_NAME);39 seq_printf(seq, "\tdrm_dp_link\n\t\trate = %u\n",40 debug->panel->link_info.rate);41 seq_printf(seq, "\t\tnum_lanes = %u\n",42 debug->panel->link_info.num_lanes);43 seq_printf(seq, "\t\tcapabilities = %lu\n",44 debug->panel->link_info.capabilities);45 seq_printf(seq, "\tdp_panel_info:\n\t\tactive = %dx%d\n",46 drm_mode->hdisplay,47 drm_mode->vdisplay);48 seq_printf(seq, "\t\tback_porch = %dx%d\n",49 drm_mode->htotal - drm_mode->hsync_end,50 drm_mode->vtotal - drm_mode->vsync_end);51 seq_printf(seq, "\t\tfront_porch = %dx%d\n",52 drm_mode->hsync_start - drm_mode->hdisplay,53 drm_mode->vsync_start - drm_mode->vdisplay);54 seq_printf(seq, "\t\tsync_width = %dx%d\n",55 drm_mode->hsync_end - drm_mode->hsync_start,56 drm_mode->vsync_end - drm_mode->vsync_start);57 seq_printf(seq, "\t\tactive_low = %dx%d\n",58 debug->panel->dp_mode.h_active_low,59 debug->panel->dp_mode.v_active_low);60 seq_printf(seq, "\t\th_skew = %d\n",61 drm_mode->hskew);62 seq_printf(seq, "\t\trefresh rate = %d\n",63 drm_mode_vrefresh(drm_mode));64 seq_printf(seq, "\t\tpixel clock khz = %d\n",65 drm_mode->clock);66 seq_printf(seq, "\t\tbpp = %d\n",67 debug->panel->dp_mode.bpp);68 69 /* Link Information */70 seq_printf(seq, "\tdp_link:\n\t\ttest_requested = %d\n",71 debug->link->sink_request);72 seq_printf(seq, "\t\tnum_lanes = %d\n",73 debug->link->link_params.num_lanes);74 link_params_rate = debug->link->link_params.rate;75 seq_printf(seq, "\t\tbw_code = %d\n",76 drm_dp_link_rate_to_bw_code(link_params_rate));77 lclk = debug->link->link_params.rate * 1000;78 seq_printf(seq, "\t\tlclk = %lld\n", lclk);79 seq_printf(seq, "\t\tv_level = %d\n",80 debug->link->phy_params.v_level);81 seq_printf(seq, "\t\tp_level = %d\n",82 debug->link->phy_params.p_level);83 84 return 0;85}86DEFINE_SHOW_ATTRIBUTE(dp_debug);87 88static int dp_test_data_show(struct seq_file *m, void *data)89{90 const struct dp_debug_private *debug = m->private;91 const struct drm_connector *connector = debug->connector;92 u32 bpc;93 94 if (connector->status == connector_status_connected) {95 bpc = debug->link->test_video.test_bit_depth;96 seq_printf(m, "hdisplay: %d\n",97 debug->link->test_video.test_h_width);98 seq_printf(m, "vdisplay: %d\n",99 debug->link->test_video.test_v_height);100 seq_printf(m, "bpc: %u\n",101 dp_link_bit_depth_to_bpp(bpc) / 3);102 } else {103 seq_puts(m, "0");104 }105 106 return 0;107}108DEFINE_SHOW_ATTRIBUTE(dp_test_data);109 110static int dp_test_type_show(struct seq_file *m, void *data)111{112 const struct dp_debug_private *debug = m->private;113 const struct drm_connector *connector = debug->connector;114 115 if (connector->status == connector_status_connected)116 seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);117 else118 seq_puts(m, "0");119 120 return 0;121}122DEFINE_SHOW_ATTRIBUTE(dp_test_type);123 124static ssize_t dp_test_active_write(struct file *file,125 const char __user *ubuf,126 size_t len, loff_t *offp)127{128 char *input_buffer;129 int status = 0;130 const struct dp_debug_private *debug;131 const struct drm_connector *connector;132 int val = 0;133 134 debug = ((struct seq_file *)file->private_data)->private;135 connector = debug->connector;136 137 if (len == 0)138 return 0;139 140 input_buffer = memdup_user_nul(ubuf, len);141 if (IS_ERR(input_buffer))142 return PTR_ERR(input_buffer);143 144 DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);145 146 if (connector->status == connector_status_connected) {147 status = kstrtoint(input_buffer, 10, &val);148 if (status < 0) {149 kfree(input_buffer);150 return status;151 }152 DRM_DEBUG_DRIVER("Got %d for test active\n", val);153 /* To prevent erroneous activation of the compliance154 * testing code, only accept an actual value of 1 here155 */156 if (val == 1)157 debug->panel->video_test = true;158 else159 debug->panel->video_test = false;160 }161 kfree(input_buffer);162 163 *offp += len;164 return len;165}166 167static int dp_test_active_show(struct seq_file *m, void *data)168{169 struct dp_debug_private *debug = m->private;170 struct drm_connector *connector = debug->connector;171 172 if (connector->status == connector_status_connected) {173 if (debug->panel->video_test)174 seq_puts(m, "1");175 else176 seq_puts(m, "0");177 } else {178 seq_puts(m, "0");179 }180 181 return 0;182}183 184static int dp_test_active_open(struct inode *inode,185 struct file *file)186{187 return single_open(file, dp_test_active_show,188 inode->i_private);189}190 191static const struct file_operations test_active_fops = {192 .owner = THIS_MODULE,193 .open = dp_test_active_open,194 .read = seq_read,195 .llseek = seq_lseek,196 .release = single_release,197 .write = dp_test_active_write198};199 200int dp_debug_init(struct device *dev, struct dp_panel *panel,201 struct dp_link *link,202 struct drm_connector *connector,203 struct dentry *root, bool is_edp)204{205 struct dp_debug_private *debug;206 207 if (!dev || !panel || !link) {208 DRM_ERROR("invalid input\n");209 return -EINVAL;210 }211 212 debug = devm_kzalloc(dev, sizeof(*debug), GFP_KERNEL);213 if (!debug)214 return -ENOMEM;215 216 debug->link = link;217 debug->panel = panel;218 219 debugfs_create_file("dp_debug", 0444, root,220 debug, &dp_debug_fops);221 222 if (!is_edp) {223 debugfs_create_file("msm_dp_test_active", 0444,224 root,225 debug, &test_active_fops);226 227 debugfs_create_file("msm_dp_test_data", 0444,228 root,229 debug, &dp_test_data_fops);230 231 debugfs_create_file("msm_dp_test_type", 0444,232 root,233 debug, &dp_test_type_fops);234 }235 236 return 0;237}238