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1/*
2 drm_edid_load.c: use a built-in EDID data set or load it via the firmware
3 interface
4
5 Copyright (C) 2012 Carsten Emde <C.Emde@osadl.org>
6
7 This program is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License
9 as published by the Free Software Foundation; either version 2
10 of the License, or (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20*/
21
22#include <linux/module.h>
23#include <linux/firmware.h>
24#include <drm/drmP.h>
25#include <drm/drm_crtc.h>
26#include <drm/drm_crtc_helper.h>
27#include <drm/drm_edid.h>
28
29static char edid_firmware[PATH_MAX];
30module_param_string(edid_firmware, edid_firmware, sizeof(edid_firmware), 0644);
31MODULE_PARM_DESC(edid_firmware, "Do not probe monitor, use specified EDID blob "
32 "from built-in data or /lib/firmware instead. ");
33
34#define GENERIC_EDIDS 6
35static const char * const generic_edid_name[GENERIC_EDIDS] = {
36 "edid/800x600.bin",
37 "edid/1024x768.bin",
38 "edid/1280x1024.bin",
39 "edid/1600x1200.bin",
40 "edid/1680x1050.bin",
41 "edid/1920x1080.bin",
42};
43
44static const u8 generic_edid[GENERIC_EDIDS][128] = {
45 {
46 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
47 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
48 0x05, 0x16, 0x01, 0x03, 0x6d, 0x1b, 0x14, 0x78,
49 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
50 0x20, 0x50, 0x54, 0x01, 0x00, 0x00, 0x45, 0x40,
51 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
52 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0xa0, 0x0f,
53 0x20, 0x00, 0x31, 0x58, 0x1c, 0x20, 0x28, 0x80,
54 0x14, 0x00, 0x15, 0xd0, 0x10, 0x00, 0x00, 0x1e,
55 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
56 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
57 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
58 0x3d, 0x24, 0x26, 0x05, 0x00, 0x0a, 0x20, 0x20,
59 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
60 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53,
61 0x56, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xc2,
62 },
63 {
64 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
65 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
66 0x05, 0x16, 0x01, 0x03, 0x6d, 0x23, 0x1a, 0x78,
67 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
68 0x20, 0x50, 0x54, 0x00, 0x08, 0x00, 0x61, 0x40,
69 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
70 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x64, 0x19,
71 0x00, 0x40, 0x41, 0x00, 0x26, 0x30, 0x08, 0x90,
72 0x36, 0x00, 0x63, 0x0a, 0x11, 0x00, 0x00, 0x18,
73 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
74 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
75 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
76 0x3d, 0x2f, 0x31, 0x07, 0x00, 0x0a, 0x20, 0x20,
77 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
78 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x58,
79 0x47, 0x41, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x55,
80 },
81 {
82 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
83 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x05, 0x16, 0x01, 0x03, 0x6d, 0x2c, 0x23, 0x78,
85 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
86 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0x81, 0x80,
87 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
88 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x30, 0x2a,
89 0x00, 0x98, 0x51, 0x00, 0x2a, 0x40, 0x30, 0x70,
90 0x13, 0x00, 0xbc, 0x63, 0x11, 0x00, 0x00, 0x1e,
91 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
92 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
93 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
94 0x3d, 0x3e, 0x40, 0x0b, 0x00, 0x0a, 0x20, 0x20,
95 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
96 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53,
97 0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xa0,
98 },
99 {
100 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
101 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
102 0x05, 0x16, 0x01, 0x03, 0x6d, 0x37, 0x29, 0x78,
103 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
104 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xa9, 0x40,
105 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
106 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x48, 0x3f,
107 0x40, 0x30, 0x62, 0xb0, 0x32, 0x40, 0x40, 0xc0,
108 0x13, 0x00, 0x2b, 0xa0, 0x21, 0x00, 0x00, 0x1e,
109 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
110 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
111 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
112 0x3d, 0x4a, 0x4c, 0x11, 0x00, 0x0a, 0x20, 0x20,
113 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
114 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x55,
115 0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0x9d,
116 },
117 {
118 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
119 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
120 0x05, 0x16, 0x01, 0x03, 0x6d, 0x2b, 0x1b, 0x78,
121 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
122 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xb3, 0x00,
123 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
124 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x21, 0x39,
125 0x90, 0x30, 0x62, 0x1a, 0x27, 0x40, 0x68, 0xb0,
126 0x36, 0x00, 0xb5, 0x11, 0x11, 0x00, 0x00, 0x1e,
127 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
128 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
129 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
130 0x3d, 0x40, 0x42, 0x0f, 0x00, 0x0a, 0x20, 0x20,
131 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
132 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x57,
133 0x53, 0x58, 0x47, 0x41, 0x0a, 0x20, 0x00, 0x26,
134 },
135 {
136 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
137 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
138 0x05, 0x16, 0x01, 0x03, 0x6d, 0x32, 0x1c, 0x78,
139 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
140 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xd1, 0xc0,
141 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
142 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x3a,
143 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
144 0x45, 0x00, 0xf4, 0x19, 0x11, 0x00, 0x00, 0x1e,
145 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
146 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
147 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
148 0x3d, 0x42, 0x44, 0x0f, 0x00, 0x0a, 0x20, 0x20,
149 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
150 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x46,
151 0x48, 0x44, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x05,
152 },
153};
154
155static int edid_size(const u8 *edid, int data_size)
156{
157 if (data_size < EDID_LENGTH)
158 return 0;
159
160 return (edid[0x7e] + 1) * EDID_LENGTH;
161}
162
163static void *edid_load(struct drm_connector *connector, const char *name,
164 const char *connector_name)
165{
166 const struct firmware *fw = NULL;
167 const u8 *fwdata;
168 u8 *edid;
169 int fwsize, builtin;
170 int i, valid_extensions = 0;
171 bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS);
172
173 builtin = match_string(generic_edid_name, GENERIC_EDIDS, name);
174 if (builtin >= 0) {
175 fwdata = generic_edid[builtin];
176 fwsize = sizeof(generic_edid[builtin]);
177 } else {
178 struct platform_device *pdev;
179 int err;
180
181 pdev = platform_device_register_simple(connector_name, -1, NULL, 0);
182 if (IS_ERR(pdev)) {
183 DRM_ERROR("Failed to register EDID firmware platform device "
184 "for connector \"%s\"\n", connector_name);
185 return ERR_CAST(pdev);
186 }
187
188 err = request_firmware(&fw, name, &pdev->dev);
189 platform_device_unregister(pdev);
190 if (err) {
191 DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n",
192 name, err);
193 return ERR_PTR(err);
194 }
195
196 fwdata = fw->data;
197 fwsize = fw->size;
198 }
199
200 if (edid_size(fwdata, fwsize) != fwsize) {
201 DRM_ERROR("Size of EDID firmware \"%s\" is invalid "
202 "(expected %d, got %d\n", name,
203 edid_size(fwdata, fwsize), (int)fwsize);
204 edid = ERR_PTR(-EINVAL);
205 goto out;
206 }
207
208 edid = kmemdup(fwdata, fwsize, GFP_KERNEL);
209 if (edid == NULL) {
210 edid = ERR_PTR(-ENOMEM);
211 goto out;
212 }
213
214 if (!drm_edid_block_valid(edid, 0, print_bad_edid,
215 &connector->edid_corrupt)) {
216 connector->bad_edid_counter++;
217 DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",
218 name);
219 kfree(edid);
220 edid = ERR_PTR(-EINVAL);
221 goto out;
222 }
223
224 for (i = 1; i <= edid[0x7e]; i++) {
225 if (i != valid_extensions + 1)
226 memcpy(edid + (valid_extensions + 1) * EDID_LENGTH,
227 edid + i * EDID_LENGTH, EDID_LENGTH);
228 if (drm_edid_block_valid(edid + i * EDID_LENGTH, i,
229 print_bad_edid,
230 NULL))
231 valid_extensions++;
232 }
233
234 if (valid_extensions != edid[0x7e]) {
235 u8 *new_edid;
236
237 edid[EDID_LENGTH-1] += edid[0x7e] - valid_extensions;
238 DRM_INFO("Found %d valid extensions instead of %d in EDID data "
239 "\"%s\" for connector \"%s\"\n", valid_extensions,
240 edid[0x7e], name, connector_name);
241 edid[0x7e] = valid_extensions;
242
243 new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,
244 GFP_KERNEL);
245 if (new_edid)
246 edid = new_edid;
247 }
248
249 DRM_INFO("Got %s EDID base block and %d extension%s from "
250 "\"%s\" for connector \"%s\"\n", (builtin >= 0) ? "built-in" :
251 "external", valid_extensions, valid_extensions == 1 ? "" : "s",
252 name, connector_name);
253
254out:
255 release_firmware(fw);
256 return edid;
257}
258
259int drm_load_edid_firmware(struct drm_connector *connector)
260{
261 const char *connector_name = connector->name;
262 char *edidname, *last, *colon, *fwstr, *edidstr, *fallback = NULL;
263 int ret;
264 struct edid *edid;
265
266 if (edid_firmware[0] == '\0')
267 return 0;
268
269 /*
270 * If there are multiple edid files specified and separated
271 * by commas, search through the list looking for one that
272 * matches the connector.
273 *
274 * If there's one or more that don't't specify a connector, keep
275 * the last one found one as a fallback.
276 */
277 fwstr = kstrdup(edid_firmware, GFP_KERNEL);
278 edidstr = fwstr;
279
280 while ((edidname = strsep(&edidstr, ","))) {
281 colon = strchr(edidname, ':');
282 if (colon != NULL) {
283 if (strncmp(connector_name, edidname, colon - edidname))
284 continue;
285 edidname = colon + 1;
286 break;
287 }
288
289 if (*edidname != '\0') /* corner case: multiple ',' */
290 fallback = edidname;
291 }
292
293 if (!edidname) {
294 if (!fallback) {
295 kfree(fwstr);
296 return 0;
297 }
298 edidname = fallback;
299 }
300
301 last = edidname + strlen(edidname) - 1;
302 if (*last == '\n')
303 *last = '\0';
304
305 edid = edid_load(connector, edidname, connector_name);
306 kfree(fwstr);
307
308 if (IS_ERR_OR_NULL(edid))
309 return 0;
310
311 drm_mode_connector_update_edid_property(connector, edid);
312 ret = drm_add_edid_modes(connector, edid);
313 drm_edid_to_eld(connector, edid);
314 kfree(edid);
315
316 return ret;
317}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 drm_edid_load.c: use a built-in EDID data set or load it via the firmware
4 interface
5
6 Copyright (C) 2012 Carsten Emde <C.Emde@osadl.org>
7
8*/
9
10#include <linux/firmware.h>
11#include <linux/module.h>
12#include <linux/platform_device.h>
13
14#include <drm/drm_crtc.h>
15#include <drm/drm_crtc_helper.h>
16#include <drm/drm_drv.h>
17#include <drm/drm_edid.h>
18#include <drm/drm_print.h>
19
20static char edid_firmware[PATH_MAX];
21module_param_string(edid_firmware, edid_firmware, sizeof(edid_firmware), 0644);
22MODULE_PARM_DESC(edid_firmware, "Do not probe monitor, use specified EDID blob "
23 "from built-in data or /lib/firmware instead. ");
24
25/* Use only for backward compatibility with drm_kms_helper.edid_firmware */
26int __drm_set_edid_firmware_path(const char *path)
27{
28 scnprintf(edid_firmware, sizeof(edid_firmware), "%s", path);
29
30 return 0;
31}
32EXPORT_SYMBOL(__drm_set_edid_firmware_path);
33
34/* Use only for backward compatibility with drm_kms_helper.edid_firmware */
35int __drm_get_edid_firmware_path(char *buf, size_t bufsize)
36{
37 return scnprintf(buf, bufsize, "%s", edid_firmware);
38}
39EXPORT_SYMBOL(__drm_get_edid_firmware_path);
40
41#define GENERIC_EDIDS 6
42static const char * const generic_edid_name[GENERIC_EDIDS] = {
43 "edid/800x600.bin",
44 "edid/1024x768.bin",
45 "edid/1280x1024.bin",
46 "edid/1600x1200.bin",
47 "edid/1680x1050.bin",
48 "edid/1920x1080.bin",
49};
50
51static const u8 generic_edid[GENERIC_EDIDS][128] = {
52 {
53 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
54 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
55 0x05, 0x16, 0x01, 0x03, 0x6d, 0x1b, 0x14, 0x78,
56 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
57 0x20, 0x50, 0x54, 0x01, 0x00, 0x00, 0x45, 0x40,
58 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
59 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0xa0, 0x0f,
60 0x20, 0x00, 0x31, 0x58, 0x1c, 0x20, 0x28, 0x80,
61 0x14, 0x00, 0x15, 0xd0, 0x10, 0x00, 0x00, 0x1e,
62 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
63 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
64 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
65 0x3d, 0x24, 0x26, 0x05, 0x00, 0x0a, 0x20, 0x20,
66 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
67 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53,
68 0x56, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xc2,
69 },
70 {
71 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
72 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
73 0x05, 0x16, 0x01, 0x03, 0x6d, 0x23, 0x1a, 0x78,
74 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
75 0x20, 0x50, 0x54, 0x00, 0x08, 0x00, 0x61, 0x40,
76 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
77 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x64, 0x19,
78 0x00, 0x40, 0x41, 0x00, 0x26, 0x30, 0x08, 0x90,
79 0x36, 0x00, 0x63, 0x0a, 0x11, 0x00, 0x00, 0x18,
80 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
81 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
82 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
83 0x3d, 0x2f, 0x31, 0x07, 0x00, 0x0a, 0x20, 0x20,
84 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
85 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x58,
86 0x47, 0x41, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x55,
87 },
88 {
89 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
90 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
91 0x05, 0x16, 0x01, 0x03, 0x6d, 0x2c, 0x23, 0x78,
92 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
93 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0x81, 0x80,
94 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
95 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x30, 0x2a,
96 0x00, 0x98, 0x51, 0x00, 0x2a, 0x40, 0x30, 0x70,
97 0x13, 0x00, 0xbc, 0x63, 0x11, 0x00, 0x00, 0x1e,
98 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
99 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
100 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
101 0x3d, 0x3e, 0x40, 0x0b, 0x00, 0x0a, 0x20, 0x20,
102 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
103 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53,
104 0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xa0,
105 },
106 {
107 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
108 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
109 0x05, 0x16, 0x01, 0x03, 0x6d, 0x37, 0x29, 0x78,
110 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
111 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xa9, 0x40,
112 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
113 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x48, 0x3f,
114 0x40, 0x30, 0x62, 0xb0, 0x32, 0x40, 0x40, 0xc0,
115 0x13, 0x00, 0x2b, 0xa0, 0x21, 0x00, 0x00, 0x1e,
116 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
117 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
118 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
119 0x3d, 0x4a, 0x4c, 0x11, 0x00, 0x0a, 0x20, 0x20,
120 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
121 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x55,
122 0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0x9d,
123 },
124 {
125 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
126 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
127 0x05, 0x16, 0x01, 0x03, 0x6d, 0x2b, 0x1b, 0x78,
128 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
129 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xb3, 0x00,
130 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
131 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x21, 0x39,
132 0x90, 0x30, 0x62, 0x1a, 0x27, 0x40, 0x68, 0xb0,
133 0x36, 0x00, 0xb5, 0x11, 0x11, 0x00, 0x00, 0x1e,
134 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
135 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
136 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
137 0x3d, 0x40, 0x42, 0x0f, 0x00, 0x0a, 0x20, 0x20,
138 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
139 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x57,
140 0x53, 0x58, 0x47, 0x41, 0x0a, 0x20, 0x00, 0x26,
141 },
142 {
143 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
144 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
145 0x05, 0x16, 0x01, 0x03, 0x6d, 0x32, 0x1c, 0x78,
146 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
147 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xd1, 0xc0,
148 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
149 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x3a,
150 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
151 0x45, 0x00, 0xf4, 0x19, 0x11, 0x00, 0x00, 0x1e,
152 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
153 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
154 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
155 0x3d, 0x42, 0x44, 0x0f, 0x00, 0x0a, 0x20, 0x20,
156 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
157 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x46,
158 0x48, 0x44, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x05,
159 },
160};
161
162static int edid_size(const u8 *edid, int data_size)
163{
164 if (data_size < EDID_LENGTH)
165 return 0;
166
167 return (edid[0x7e] + 1) * EDID_LENGTH;
168}
169
170static void *edid_load(struct drm_connector *connector, const char *name,
171 const char *connector_name)
172{
173 const struct firmware *fw = NULL;
174 const u8 *fwdata;
175 u8 *edid;
176 int fwsize, builtin;
177 int i, valid_extensions = 0;
178 bool print_bad_edid = !connector->bad_edid_counter || drm_debug_enabled(DRM_UT_KMS);
179
180 builtin = match_string(generic_edid_name, GENERIC_EDIDS, name);
181 if (builtin >= 0) {
182 fwdata = generic_edid[builtin];
183 fwsize = sizeof(generic_edid[builtin]);
184 } else {
185 struct platform_device *pdev;
186 int err;
187
188 pdev = platform_device_register_simple(connector_name, -1, NULL, 0);
189 if (IS_ERR(pdev)) {
190 DRM_ERROR("Failed to register EDID firmware platform device "
191 "for connector \"%s\"\n", connector_name);
192 return ERR_CAST(pdev);
193 }
194
195 err = request_firmware(&fw, name, &pdev->dev);
196 platform_device_unregister(pdev);
197 if (err) {
198 DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n",
199 name, err);
200 return ERR_PTR(err);
201 }
202
203 fwdata = fw->data;
204 fwsize = fw->size;
205 }
206
207 if (edid_size(fwdata, fwsize) != fwsize) {
208 DRM_ERROR("Size of EDID firmware \"%s\" is invalid "
209 "(expected %d, got %d\n", name,
210 edid_size(fwdata, fwsize), (int)fwsize);
211 edid = ERR_PTR(-EINVAL);
212 goto out;
213 }
214
215 edid = kmemdup(fwdata, fwsize, GFP_KERNEL);
216 if (edid == NULL) {
217 edid = ERR_PTR(-ENOMEM);
218 goto out;
219 }
220
221 if (!drm_edid_block_valid(edid, 0, print_bad_edid,
222 &connector->edid_corrupt)) {
223 connector->bad_edid_counter++;
224 DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",
225 name);
226 kfree(edid);
227 edid = ERR_PTR(-EINVAL);
228 goto out;
229 }
230
231 for (i = 1; i <= edid[0x7e]; i++) {
232 if (i != valid_extensions + 1)
233 memcpy(edid + (valid_extensions + 1) * EDID_LENGTH,
234 edid + i * EDID_LENGTH, EDID_LENGTH);
235 if (drm_edid_block_valid(edid + i * EDID_LENGTH, i,
236 print_bad_edid,
237 NULL))
238 valid_extensions++;
239 }
240
241 if (valid_extensions != edid[0x7e]) {
242 u8 *new_edid;
243
244 edid[EDID_LENGTH-1] += edid[0x7e] - valid_extensions;
245 DRM_INFO("Found %d valid extensions instead of %d in EDID data "
246 "\"%s\" for connector \"%s\"\n", valid_extensions,
247 edid[0x7e], name, connector_name);
248 edid[0x7e] = valid_extensions;
249
250 new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,
251 GFP_KERNEL);
252 if (new_edid)
253 edid = new_edid;
254 }
255
256 DRM_INFO("Got %s EDID base block and %d extension%s from "
257 "\"%s\" for connector \"%s\"\n", (builtin >= 0) ? "built-in" :
258 "external", valid_extensions, valid_extensions == 1 ? "" : "s",
259 name, connector_name);
260
261out:
262 release_firmware(fw);
263 return edid;
264}
265
266struct edid *drm_load_edid_firmware(struct drm_connector *connector)
267{
268 const char *connector_name = connector->name;
269 char *edidname, *last, *colon, *fwstr, *edidstr, *fallback = NULL;
270 struct edid *edid;
271
272 if (edid_firmware[0] == '\0')
273 return ERR_PTR(-ENOENT);
274
275 /*
276 * If there are multiple edid files specified and separated
277 * by commas, search through the list looking for one that
278 * matches the connector.
279 *
280 * If there's one or more that doesn't specify a connector, keep
281 * the last one found one as a fallback.
282 */
283 fwstr = kstrdup(edid_firmware, GFP_KERNEL);
284 if (!fwstr)
285 return ERR_PTR(-ENOMEM);
286 edidstr = fwstr;
287
288 while ((edidname = strsep(&edidstr, ","))) {
289 colon = strchr(edidname, ':');
290 if (colon != NULL) {
291 if (strncmp(connector_name, edidname, colon - edidname))
292 continue;
293 edidname = colon + 1;
294 break;
295 }
296
297 if (*edidname != '\0') /* corner case: multiple ',' */
298 fallback = edidname;
299 }
300
301 if (!edidname) {
302 if (!fallback) {
303 kfree(fwstr);
304 return ERR_PTR(-ENOENT);
305 }
306 edidname = fallback;
307 }
308
309 last = edidname + strlen(edidname) - 1;
310 if (*last == '\n')
311 *last = '\0';
312
313 edid = edid_load(connector, edidname, connector_name);
314 kfree(fwstr);
315
316 return edid;
317}