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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 & 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}
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 5
35static const char *generic_edid_name[GENERIC_EDIDS] = {
36 "edid/1024x768.bin",
37 "edid/1280x1024.bin",
38 "edid/1600x1200.bin",
39 "edid/1680x1050.bin",
40 "edid/1920x1080.bin",
41};
42
43static const u8 generic_edid[GENERIC_EDIDS][128] = {
44 {
45 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
46 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
47 0x05, 0x16, 0x01, 0x03, 0x6d, 0x23, 0x1a, 0x78,
48 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
49 0x20, 0x50, 0x54, 0x00, 0x08, 0x00, 0x61, 0x40,
50 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
51 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x64, 0x19,
52 0x00, 0x40, 0x41, 0x00, 0x26, 0x30, 0x08, 0x90,
53 0x36, 0x00, 0x63, 0x0a, 0x11, 0x00, 0x00, 0x18,
54 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
55 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
56 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
57 0x3d, 0x2f, 0x31, 0x07, 0x00, 0x0a, 0x20, 0x20,
58 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
59 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x58,
60 0x47, 0x41, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x55,
61 },
62 {
63 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
64 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
65 0x05, 0x16, 0x01, 0x03, 0x6d, 0x2c, 0x23, 0x78,
66 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
67 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0x81, 0x80,
68 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
69 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x30, 0x2a,
70 0x00, 0x98, 0x51, 0x00, 0x2a, 0x40, 0x30, 0x70,
71 0x13, 0x00, 0xbc, 0x63, 0x11, 0x00, 0x00, 0x1e,
72 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
73 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
74 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
75 0x3d, 0x3e, 0x40, 0x0b, 0x00, 0x0a, 0x20, 0x20,
76 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
77 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53,
78 0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xa0,
79 },
80 {
81 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
82 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83 0x05, 0x16, 0x01, 0x03, 0x6d, 0x37, 0x29, 0x78,
84 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
85 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xa9, 0x40,
86 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
87 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x48, 0x3f,
88 0x40, 0x30, 0x62, 0xb0, 0x32, 0x40, 0x40, 0xc0,
89 0x13, 0x00, 0x2b, 0xa0, 0x21, 0x00, 0x00, 0x1e,
90 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
91 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
92 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
93 0x3d, 0x4a, 0x4c, 0x11, 0x00, 0x0a, 0x20, 0x20,
94 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
95 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x55,
96 0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0x9d,
97 },
98 {
99 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
100 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
101 0x05, 0x16, 0x01, 0x03, 0x6d, 0x2b, 0x1b, 0x78,
102 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
103 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xb3, 0x00,
104 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
105 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x21, 0x39,
106 0x90, 0x30, 0x62, 0x1a, 0x27, 0x40, 0x68, 0xb0,
107 0x36, 0x00, 0xb5, 0x11, 0x11, 0x00, 0x00, 0x1e,
108 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
109 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
110 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
111 0x3d, 0x40, 0x42, 0x0f, 0x00, 0x0a, 0x20, 0x20,
112 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
113 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x57,
114 0x53, 0x58, 0x47, 0x41, 0x0a, 0x20, 0x00, 0x26,
115 },
116 {
117 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
118 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
119 0x05, 0x16, 0x01, 0x03, 0x6d, 0x32, 0x1c, 0x78,
120 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
121 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xd1, 0xc0,
122 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
123 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x3a,
124 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
125 0x45, 0x00, 0xf4, 0x19, 0x11, 0x00, 0x00, 0x1e,
126 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
127 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
128 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
129 0x3d, 0x42, 0x44, 0x0f, 0x00, 0x0a, 0x20, 0x20,
130 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
131 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x46,
132 0x48, 0x44, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x05,
133 },
134};
135
136static int edid_size(const u8 *edid, int data_size)
137{
138 if (data_size < EDID_LENGTH)
139 return 0;
140
141 return (edid[0x7e] + 1) * EDID_LENGTH;
142}
143
144static void *edid_load(struct drm_connector *connector, const char *name,
145 const char *connector_name)
146{
147 const struct firmware *fw = NULL;
148 const u8 *fwdata;
149 u8 *edid;
150 int fwsize, builtin;
151 int i, valid_extensions = 0;
152 bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS);
153
154 builtin = 0;
155 for (i = 0; i < GENERIC_EDIDS; i++) {
156 if (strcmp(name, generic_edid_name[i]) == 0) {
157 fwdata = generic_edid[i];
158 fwsize = sizeof(generic_edid[i]);
159 builtin = 1;
160 break;
161 }
162 }
163 if (!builtin) {
164 struct platform_device *pdev;
165 int err;
166
167 pdev = platform_device_register_simple(connector_name, -1, NULL, 0);
168 if (IS_ERR(pdev)) {
169 DRM_ERROR("Failed to register EDID firmware platform device "
170 "for connector \"%s\"\n", connector_name);
171 return ERR_CAST(pdev);
172 }
173
174 err = request_firmware(&fw, name, &pdev->dev);
175 platform_device_unregister(pdev);
176 if (err) {
177 DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n",
178 name, err);
179 return ERR_PTR(err);
180 }
181
182 fwdata = fw->data;
183 fwsize = fw->size;
184 }
185
186 if (edid_size(fwdata, fwsize) != fwsize) {
187 DRM_ERROR("Size of EDID firmware \"%s\" is invalid "
188 "(expected %d, got %d\n", name,
189 edid_size(fwdata, fwsize), (int)fwsize);
190 edid = ERR_PTR(-EINVAL);
191 goto out;
192 }
193
194 edid = kmemdup(fwdata, fwsize, GFP_KERNEL);
195 if (edid == NULL) {
196 edid = ERR_PTR(-ENOMEM);
197 goto out;
198 }
199
200 if (!drm_edid_block_valid(edid, 0, print_bad_edid)) {
201 connector->bad_edid_counter++;
202 DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",
203 name);
204 kfree(edid);
205 edid = ERR_PTR(-EINVAL);
206 goto out;
207 }
208
209 for (i = 1; i <= edid[0x7e]; i++) {
210 if (i != valid_extensions + 1)
211 memcpy(edid + (valid_extensions + 1) * EDID_LENGTH,
212 edid + i * EDID_LENGTH, EDID_LENGTH);
213 if (drm_edid_block_valid(edid + i * EDID_LENGTH, i, print_bad_edid))
214 valid_extensions++;
215 }
216
217 if (valid_extensions != edid[0x7e]) {
218 u8 *new_edid;
219
220 edid[EDID_LENGTH-1] += edid[0x7e] - valid_extensions;
221 DRM_INFO("Found %d valid extensions instead of %d in EDID data "
222 "\"%s\" for connector \"%s\"\n", valid_extensions,
223 edid[0x7e], name, connector_name);
224 edid[0x7e] = valid_extensions;
225
226 new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,
227 GFP_KERNEL);
228 if (new_edid)
229 edid = new_edid;
230 }
231
232 DRM_INFO("Got %s EDID base block and %d extension%s from "
233 "\"%s\" for connector \"%s\"\n", builtin ? "built-in" :
234 "external", valid_extensions, valid_extensions == 1 ? "" : "s",
235 name, connector_name);
236
237out:
238 if (fw)
239 release_firmware(fw);
240 return edid;
241}
242
243int drm_load_edid_firmware(struct drm_connector *connector)
244{
245 const char *connector_name = drm_get_connector_name(connector);
246 char *edidname = edid_firmware, *last, *colon;
247 int ret;
248 struct edid *edid;
249
250 if (*edidname == '\0')
251 return 0;
252
253 colon = strchr(edidname, ':');
254 if (colon != NULL) {
255 if (strncmp(connector_name, edidname, colon - edidname))
256 return 0;
257 edidname = colon + 1;
258 if (*edidname == '\0')
259 return 0;
260 }
261
262 last = edidname + strlen(edidname) - 1;
263 if (*last == '\n')
264 *last = '\0';
265
266 edid = edid_load(connector, edidname, connector_name);
267 if (IS_ERR_OR_NULL(edid))
268 return 0;
269
270 drm_mode_connector_update_edid_property(connector, edid);
271 ret = drm_add_edid_modes(connector, edid);
272 kfree(edid);
273
274 return ret;
275}