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_parser.h"
13 #include "dp_catalog.h"
14 #include "dp_aux.h"
15 #include "dp_ctrl.h"
16 #include "dp_debug.h"
17 #include "dp_display.h"
18
19 #define DEBUG_NAME "msm_dp"
20
21 struct dp_debug_private {
22 struct dentry *root;
23
24 struct dp_usbpd *usbpd;
25 struct dp_link *link;
26 struct dp_panel *panel;
27 struct drm_connector *connector;
28 struct device *dev;
29 struct drm_device *drm_dev;
30
31 struct dp_debug dp_debug;
32 };
33
dp_debug_show(struct seq_file * seq,void * p)34 static int dp_debug_show(struct seq_file *seq, void *p)
35 {
36 struct dp_debug_private *debug = seq->private;
37 u64 lclk = 0;
38 u32 link_params_rate;
39 const struct drm_display_mode *drm_mode;
40
41 if (!debug)
42 return -ENODEV;
43
44 drm_mode = &debug->panel->dp_mode.drm_mode;
45
46 seq_printf(seq, "\tname = %s\n", DEBUG_NAME);
47 seq_printf(seq, "\tdrm_dp_link\n\t\trate = %u\n",
48 debug->panel->link_info.rate);
49 seq_printf(seq, "\t\tnum_lanes = %u\n",
50 debug->panel->link_info.num_lanes);
51 seq_printf(seq, "\t\tcapabilities = %lu\n",
52 debug->panel->link_info.capabilities);
53 seq_printf(seq, "\tdp_panel_info:\n\t\tactive = %dx%d\n",
54 drm_mode->hdisplay,
55 drm_mode->vdisplay);
56 seq_printf(seq, "\t\tback_porch = %dx%d\n",
57 drm_mode->htotal - drm_mode->hsync_end,
58 drm_mode->vtotal - drm_mode->vsync_end);
59 seq_printf(seq, "\t\tfront_porch = %dx%d\n",
60 drm_mode->hsync_start - drm_mode->hdisplay,
61 drm_mode->vsync_start - drm_mode->vdisplay);
62 seq_printf(seq, "\t\tsync_width = %dx%d\n",
63 drm_mode->hsync_end - drm_mode->hsync_start,
64 drm_mode->vsync_end - drm_mode->vsync_start);
65 seq_printf(seq, "\t\tactive_low = %dx%d\n",
66 debug->panel->dp_mode.h_active_low,
67 debug->panel->dp_mode.v_active_low);
68 seq_printf(seq, "\t\th_skew = %d\n",
69 drm_mode->hskew);
70 seq_printf(seq, "\t\trefresh rate = %d\n",
71 drm_mode_vrefresh(drm_mode));
72 seq_printf(seq, "\t\tpixel clock khz = %d\n",
73 drm_mode->clock);
74 seq_printf(seq, "\t\tbpp = %d\n",
75 debug->panel->dp_mode.bpp);
76
77 /* Link Information */
78 seq_printf(seq, "\tdp_link:\n\t\ttest_requested = %d\n",
79 debug->link->sink_request);
80 seq_printf(seq, "\t\tnum_lanes = %d\n",
81 debug->link->link_params.num_lanes);
82 link_params_rate = debug->link->link_params.rate;
83 seq_printf(seq, "\t\tbw_code = %d\n",
84 drm_dp_link_rate_to_bw_code(link_params_rate));
85 lclk = debug->link->link_params.rate * 1000;
86 seq_printf(seq, "\t\tlclk = %lld\n", lclk);
87 seq_printf(seq, "\t\tv_level = %d\n",
88 debug->link->phy_params.v_level);
89 seq_printf(seq, "\t\tp_level = %d\n",
90 debug->link->phy_params.p_level);
91
92 return 0;
93 }
94 DEFINE_SHOW_ATTRIBUTE(dp_debug);
95
dp_test_data_show(struct seq_file * m,void * data)96 static int dp_test_data_show(struct seq_file *m, void *data)
97 {
98 const struct dp_debug_private *debug = m->private;
99 const struct drm_connector *connector = debug->connector;
100 u32 bpc;
101
102 if (connector->status == connector_status_connected) {
103 bpc = debug->link->test_video.test_bit_depth;
104 seq_printf(m, "hdisplay: %d\n",
105 debug->link->test_video.test_h_width);
106 seq_printf(m, "vdisplay: %d\n",
107 debug->link->test_video.test_v_height);
108 seq_printf(m, "bpc: %u\n",
109 dp_link_bit_depth_to_bpc(bpc));
110 } else {
111 seq_puts(m, "0");
112 }
113
114 return 0;
115 }
116 DEFINE_SHOW_ATTRIBUTE(dp_test_data);
117
dp_test_type_show(struct seq_file * m,void * data)118 static int dp_test_type_show(struct seq_file *m, void *data)
119 {
120 const struct dp_debug_private *debug = m->private;
121 const struct drm_connector *connector = debug->connector;
122
123 if (connector->status == connector_status_connected)
124 seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);
125 else
126 seq_puts(m, "0");
127
128 return 0;
129 }
130 DEFINE_SHOW_ATTRIBUTE(dp_test_type);
131
dp_test_active_write(struct file * file,const char __user * ubuf,size_t len,loff_t * offp)132 static ssize_t dp_test_active_write(struct file *file,
133 const char __user *ubuf,
134 size_t len, loff_t *offp)
135 {
136 char *input_buffer;
137 int status = 0;
138 const struct dp_debug_private *debug;
139 const struct drm_connector *connector;
140 int val = 0;
141
142 debug = ((struct seq_file *)file->private_data)->private;
143 connector = debug->connector;
144
145 if (len == 0)
146 return 0;
147
148 input_buffer = memdup_user_nul(ubuf, len);
149 if (IS_ERR(input_buffer))
150 return PTR_ERR(input_buffer);
151
152 DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);
153
154 if (connector->status == connector_status_connected) {
155 status = kstrtoint(input_buffer, 10, &val);
156 if (status < 0) {
157 kfree(input_buffer);
158 return status;
159 }
160 DRM_DEBUG_DRIVER("Got %d for test active\n", val);
161 /* To prevent erroneous activation of the compliance
162 * testing code, only accept an actual value of 1 here
163 */
164 if (val == 1)
165 debug->panel->video_test = true;
166 else
167 debug->panel->video_test = false;
168 }
169 kfree(input_buffer);
170
171 *offp += len;
172 return len;
173 }
174
dp_test_active_show(struct seq_file * m,void * data)175 static int dp_test_active_show(struct seq_file *m, void *data)
176 {
177 struct dp_debug_private *debug = m->private;
178 struct drm_connector *connector = debug->connector;
179
180 if (connector->status == connector_status_connected) {
181 if (debug->panel->video_test)
182 seq_puts(m, "1");
183 else
184 seq_puts(m, "0");
185 } else {
186 seq_puts(m, "0");
187 }
188
189 return 0;
190 }
191
dp_test_active_open(struct inode * inode,struct file * file)192 static int dp_test_active_open(struct inode *inode,
193 struct file *file)
194 {
195 return single_open(file, dp_test_active_show,
196 inode->i_private);
197 }
198
199 static const struct file_operations test_active_fops = {
200 .owner = THIS_MODULE,
201 .open = dp_test_active_open,
202 .read = seq_read,
203 .llseek = seq_lseek,
204 .release = single_release,
205 .write = dp_test_active_write
206 };
207
dp_debug_init(struct dp_debug * dp_debug,struct drm_minor * minor)208 static void dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
209 {
210 char path[64];
211 struct dp_debug_private *debug = container_of(dp_debug,
212 struct dp_debug_private, dp_debug);
213
214 snprintf(path, sizeof(path), "msm_dp-%s", debug->connector->name);
215
216 debug->root = debugfs_create_dir(path, minor->debugfs_root);
217
218 debugfs_create_file("dp_debug", 0444, debug->root,
219 debug, &dp_debug_fops);
220
221 debugfs_create_file("msm_dp_test_active", 0444,
222 debug->root,
223 debug, &test_active_fops);
224
225 debugfs_create_file("msm_dp_test_data", 0444,
226 debug->root,
227 debug, &dp_test_data_fops);
228
229 debugfs_create_file("msm_dp_test_type", 0444,
230 debug->root,
231 debug, &dp_test_type_fops);
232 }
233
dp_debug_get(struct device * dev,struct dp_panel * panel,struct dp_usbpd * usbpd,struct dp_link * link,struct drm_connector * connector,struct drm_minor * minor)234 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
235 struct dp_usbpd *usbpd, struct dp_link *link,
236 struct drm_connector *connector, struct drm_minor *minor)
237 {
238 struct dp_debug_private *debug;
239 struct dp_debug *dp_debug;
240 int rc;
241
242 if (!dev || !panel || !usbpd || !link) {
243 DRM_ERROR("invalid input\n");
244 rc = -EINVAL;
245 goto error;
246 }
247
248 debug = devm_kzalloc(dev, sizeof(*debug), GFP_KERNEL);
249 if (!debug) {
250 rc = -ENOMEM;
251 goto error;
252 }
253
254 debug->dp_debug.debug_en = false;
255 debug->usbpd = usbpd;
256 debug->link = link;
257 debug->panel = panel;
258 debug->dev = dev;
259 debug->drm_dev = minor->dev;
260 debug->connector = connector;
261
262 dp_debug = &debug->dp_debug;
263 dp_debug->vdisplay = 0;
264 dp_debug->hdisplay = 0;
265 dp_debug->vrefresh = 0;
266
267 dp_debug_init(dp_debug, minor);
268
269 return dp_debug;
270 error:
271 return ERR_PTR(rc);
272 }
273
dp_debug_deinit(struct dp_debug * dp_debug)274 static int dp_debug_deinit(struct dp_debug *dp_debug)
275 {
276 struct dp_debug_private *debug;
277
278 if (!dp_debug)
279 return -EINVAL;
280
281 debug = container_of(dp_debug, struct dp_debug_private, dp_debug);
282
283 debugfs_remove_recursive(debug->root);
284
285 return 0;
286 }
287
dp_debug_put(struct dp_debug * dp_debug)288 void dp_debug_put(struct dp_debug *dp_debug)
289 {
290 struct dp_debug_private *debug;
291
292 if (!dp_debug)
293 return;
294
295 debug = container_of(dp_debug, struct dp_debug_private, dp_debug);
296
297 dp_debug_deinit(dp_debug);
298
299 devm_kfree(debug->dev, debug);
300 }
301