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1// SPDX-License-Identifier: GPL-2.0-only
2/*
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 struct dp_debug dp_debug;
26};
27
28static int dp_debug_show(struct seq_file *seq, void *p)
29{
30 struct dp_debug_private *debug = seq->private;
31 u64 lclk = 0;
32 u32 link_params_rate;
33 const struct drm_display_mode *drm_mode;
34
35 if (!debug)
36 return -ENODEV;
37
38 drm_mode = &debug->panel->dp_mode.drm_mode;
39
40 seq_printf(seq, "\tname = %s\n", DEBUG_NAME);
41 seq_printf(seq, "\tdrm_dp_link\n\t\trate = %u\n",
42 debug->panel->link_info.rate);
43 seq_printf(seq, "\t\tnum_lanes = %u\n",
44 debug->panel->link_info.num_lanes);
45 seq_printf(seq, "\t\tcapabilities = %lu\n",
46 debug->panel->link_info.capabilities);
47 seq_printf(seq, "\tdp_panel_info:\n\t\tactive = %dx%d\n",
48 drm_mode->hdisplay,
49 drm_mode->vdisplay);
50 seq_printf(seq, "\t\tback_porch = %dx%d\n",
51 drm_mode->htotal - drm_mode->hsync_end,
52 drm_mode->vtotal - drm_mode->vsync_end);
53 seq_printf(seq, "\t\tfront_porch = %dx%d\n",
54 drm_mode->hsync_start - drm_mode->hdisplay,
55 drm_mode->vsync_start - drm_mode->vdisplay);
56 seq_printf(seq, "\t\tsync_width = %dx%d\n",
57 drm_mode->hsync_end - drm_mode->hsync_start,
58 drm_mode->vsync_end - drm_mode->vsync_start);
59 seq_printf(seq, "\t\tactive_low = %dx%d\n",
60 debug->panel->dp_mode.h_active_low,
61 debug->panel->dp_mode.v_active_low);
62 seq_printf(seq, "\t\th_skew = %d\n",
63 drm_mode->hskew);
64 seq_printf(seq, "\t\trefresh rate = %d\n",
65 drm_mode_vrefresh(drm_mode));
66 seq_printf(seq, "\t\tpixel clock khz = %d\n",
67 drm_mode->clock);
68 seq_printf(seq, "\t\tbpp = %d\n",
69 debug->panel->dp_mode.bpp);
70
71 /* Link Information */
72 seq_printf(seq, "\tdp_link:\n\t\ttest_requested = %d\n",
73 debug->link->sink_request);
74 seq_printf(seq, "\t\tnum_lanes = %d\n",
75 debug->link->link_params.num_lanes);
76 link_params_rate = debug->link->link_params.rate;
77 seq_printf(seq, "\t\tbw_code = %d\n",
78 drm_dp_link_rate_to_bw_code(link_params_rate));
79 lclk = debug->link->link_params.rate * 1000;
80 seq_printf(seq, "\t\tlclk = %lld\n", lclk);
81 seq_printf(seq, "\t\tv_level = %d\n",
82 debug->link->phy_params.v_level);
83 seq_printf(seq, "\t\tp_level = %d\n",
84 debug->link->phy_params.p_level);
85
86 return 0;
87}
88DEFINE_SHOW_ATTRIBUTE(dp_debug);
89
90static int dp_test_data_show(struct seq_file *m, void *data)
91{
92 const struct dp_debug_private *debug = m->private;
93 const struct drm_connector *connector = debug->connector;
94 u32 bpc;
95
96 if (connector->status == connector_status_connected) {
97 bpc = debug->link->test_video.test_bit_depth;
98 seq_printf(m, "hdisplay: %d\n",
99 debug->link->test_video.test_h_width);
100 seq_printf(m, "vdisplay: %d\n",
101 debug->link->test_video.test_v_height);
102 seq_printf(m, "bpc: %u\n",
103 dp_link_bit_depth_to_bpp(bpc) / 3);
104 } else {
105 seq_puts(m, "0");
106 }
107
108 return 0;
109}
110DEFINE_SHOW_ATTRIBUTE(dp_test_data);
111
112static int dp_test_type_show(struct seq_file *m, void *data)
113{
114 const struct dp_debug_private *debug = m->private;
115 const struct drm_connector *connector = debug->connector;
116
117 if (connector->status == connector_status_connected)
118 seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);
119 else
120 seq_puts(m, "0");
121
122 return 0;
123}
124DEFINE_SHOW_ATTRIBUTE(dp_test_type);
125
126static ssize_t dp_test_active_write(struct file *file,
127 const char __user *ubuf,
128 size_t len, loff_t *offp)
129{
130 char *input_buffer;
131 int status = 0;
132 const struct dp_debug_private *debug;
133 const struct drm_connector *connector;
134 int val = 0;
135
136 debug = ((struct seq_file *)file->private_data)->private;
137 connector = debug->connector;
138
139 if (len == 0)
140 return 0;
141
142 input_buffer = memdup_user_nul(ubuf, len);
143 if (IS_ERR(input_buffer))
144 return PTR_ERR(input_buffer);
145
146 DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);
147
148 if (connector->status == connector_status_connected) {
149 status = kstrtoint(input_buffer, 10, &val);
150 if (status < 0) {
151 kfree(input_buffer);
152 return status;
153 }
154 DRM_DEBUG_DRIVER("Got %d for test active\n", val);
155 /* To prevent erroneous activation of the compliance
156 * testing code, only accept an actual value of 1 here
157 */
158 if (val == 1)
159 debug->panel->video_test = true;
160 else
161 debug->panel->video_test = false;
162 }
163 kfree(input_buffer);
164
165 *offp += len;
166 return len;
167}
168
169static int dp_test_active_show(struct seq_file *m, void *data)
170{
171 struct dp_debug_private *debug = m->private;
172 struct drm_connector *connector = debug->connector;
173
174 if (connector->status == connector_status_connected) {
175 if (debug->panel->video_test)
176 seq_puts(m, "1");
177 else
178 seq_puts(m, "0");
179 } else {
180 seq_puts(m, "0");
181 }
182
183 return 0;
184}
185
186static int dp_test_active_open(struct inode *inode,
187 struct file *file)
188{
189 return single_open(file, dp_test_active_show,
190 inode->i_private);
191}
192
193static const struct file_operations test_active_fops = {
194 .owner = THIS_MODULE,
195 .open = dp_test_active_open,
196 .read = seq_read,
197 .llseek = seq_lseek,
198 .release = single_release,
199 .write = dp_test_active_write
200};
201
202static void dp_debug_init(struct dp_debug *dp_debug, struct dentry *root, bool is_edp)
203{
204 struct dp_debug_private *debug = container_of(dp_debug,
205 struct dp_debug_private, dp_debug);
206
207 debugfs_create_file("dp_debug", 0444, root,
208 debug, &dp_debug_fops);
209
210 if (!is_edp) {
211 debugfs_create_file("msm_dp_test_active", 0444,
212 root,
213 debug, &test_active_fops);
214
215 debugfs_create_file("msm_dp_test_data", 0444,
216 root,
217 debug, &dp_test_data_fops);
218
219 debugfs_create_file("msm_dp_test_type", 0444,
220 root,
221 debug, &dp_test_type_fops);
222 }
223}
224
225struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
226 struct dp_link *link,
227 struct drm_connector *connector,
228 struct dentry *root, bool is_edp)
229{
230 struct dp_debug_private *debug;
231 struct dp_debug *dp_debug;
232 int rc;
233
234 if (!dev || !panel || !link) {
235 DRM_ERROR("invalid input\n");
236 rc = -EINVAL;
237 goto error;
238 }
239
240 debug = devm_kzalloc(dev, sizeof(*debug), GFP_KERNEL);
241 if (!debug) {
242 rc = -ENOMEM;
243 goto error;
244 }
245
246 debug->dp_debug.debug_en = false;
247 debug->link = link;
248 debug->panel = panel;
249
250 dp_debug = &debug->dp_debug;
251 dp_debug->vdisplay = 0;
252 dp_debug->hdisplay = 0;
253 dp_debug->vrefresh = 0;
254
255 dp_debug_init(dp_debug, root, is_edp);
256
257 return dp_debug;
258 error:
259 return ERR_PTR(rc);
260}