blob: 1c0495acf341964f7684f9e2bf5336473e7f525a [file] [log] [blame]
Carsten Emdeda0df922012-03-18 22:37:33 +01001/*
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>
David Howells760285e2012-10-02 18:01:07 +010024#include <drm/drmP.h>
25#include <drm/drm_crtc.h>
26#include <drm/drm_crtc_helper.h>
27#include <drm/drm_edid.h>
Carsten Emdeda0df922012-03-18 22:37:33 +010028
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
Daniel Thompson4cbe1bfa2014-05-23 16:01:43 +010034#define GENERIC_EDIDS 6
Ville Syrjäläa5b62372015-08-31 15:09:25 +030035static const char * const generic_edid_name[GENERIC_EDIDS] = {
Daniel Thompson4cbe1bfa2014-05-23 16:01:43 +010036 "edid/800x600.bin",
Carsten Emdeda0df922012-03-18 22:37:33 +010037 "edid/1024x768.bin",
38 "edid/1280x1024.bin",
Carsten Emde8091ee52013-04-06 16:01:34 +000039 "edid/1600x1200.bin",
Carsten Emdeda0df922012-03-18 22:37:33 +010040 "edid/1680x1050.bin",
41 "edid/1920x1080.bin",
42};
43
Chris Wilson9066f832013-10-02 11:12:53 +010044static const u8 generic_edid[GENERIC_EDIDS][128] = {
Carsten Emdeda0df922012-03-18 22:37:33 +010045 {
46 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
47 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
Daniel Thompson4cbe1bfa2014-05-23 16:01:43 +010048 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,
Carsten Emdeda0df922012-03-18 22:37:33 +010066 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,
Carsten Emde8091ee52013-04-06 16:01:34 +0000102 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,
Carsten Emdeda0df922012-03-18 22:37:33 +0100120 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
Chris Wilson9066f832013-10-02 11:12:53 +0100155static 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
Geert Uytterhoevence456e02013-11-19 12:15:05 +0100163static void *edid_load(struct drm_connector *connector, const char *name,
Linus Torvalds496fd152013-07-10 14:21:46 -0700164 const char *connector_name)
Carsten Emdeda0df922012-03-18 22:37:33 +0100165{
Chris Wilson9066f832013-10-02 11:12:53 +0100166 const struct firmware *fw = NULL;
167 const u8 *fwdata;
168 u8 *edid;
169 int fwsize, builtin;
Carsten Emdeda0df922012-03-18 22:37:33 +0100170 int i, valid_extensions = 0;
Jerome Glisse0b2443e2012-08-09 11:25:51 -0400171 bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS);
Carsten Emdeda0df922012-03-18 22:37:33 +0100172
Andy Shevchenko7a5cf522016-03-17 14:22:23 -0700173 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 {
Chris Wilson9066f832013-10-02 11:12:53 +0100178 struct platform_device *pdev;
179 int err;
Carsten Emdeda0df922012-03-18 22:37:33 +0100180
Chris Wilson9066f832013-10-02 11:12:53 +0100181 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 }
Carsten Emdeda0df922012-03-18 22:37:33 +0100187
Chris Wilson9066f832013-10-02 11:12:53 +0100188 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;
Carsten Emdeda0df922012-03-18 22:37:33 +0100197 fwsize = fw->size;
198 }
199
Chris Wilson9066f832013-10-02 11:12:53 +0100200 if (edid_size(fwdata, fwsize) != fwsize) {
Carsten Emdeda0df922012-03-18 22:37:33 +0100201 DRM_ERROR("Size of EDID firmware \"%s\" is invalid "
Chris Wilson9066f832013-10-02 11:12:53 +0100202 "(expected %d, got %d\n", name,
203 edid_size(fwdata, fwsize), (int)fwsize);
204 edid = ERR_PTR(-EINVAL);
205 goto out;
Carsten Emdeda0df922012-03-18 22:37:33 +0100206 }
207
Thomas Meyer8d06cd02013-05-22 21:06:30 +0000208 edid = kmemdup(fwdata, fwsize, GFP_KERNEL);
Carsten Emdeda0df922012-03-18 22:37:33 +0100209 if (edid == NULL) {
Chris Wilson9066f832013-10-02 11:12:53 +0100210 edid = ERR_PTR(-ENOMEM);
211 goto out;
Carsten Emdeda0df922012-03-18 22:37:33 +0100212 }
Carsten Emdeda0df922012-03-18 22:37:33 +0100213
Todd Previte6ba2bd32015-04-21 11:09:41 -0700214 if (!drm_edid_block_valid(edid, 0, print_bad_edid,
215 &connector->edid_corrupt)) {
Jerome Glisse0b2443e2012-08-09 11:25:51 -0400216 connector->bad_edid_counter++;
Carsten Emdeda0df922012-03-18 22:37:33 +0100217 DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",
218 name);
219 kfree(edid);
Chris Wilson9066f832013-10-02 11:12:53 +0100220 edid = ERR_PTR(-EINVAL);
221 goto out;
Carsten Emdeda0df922012-03-18 22:37:33 +0100222 }
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);
Todd Previte6ba2bd32015-04-21 11:09:41 -0700228 if (drm_edid_block_valid(edid + i * EDID_LENGTH, i,
229 print_bad_edid,
230 NULL))
Carsten Emdeda0df922012-03-18 22:37:33 +0100231 valid_extensions++;
232 }
233
234 if (valid_extensions != edid[0x7e]) {
Chris Wilson9066f832013-10-02 11:12:53 +0100235 u8 *new_edid;
236
Carsten Emdeda0df922012-03-18 22:37:33 +0100237 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;
Chris Wilson9066f832013-10-02 11:12:53 +0100242
Alexey Khoroshilovf7b83b92012-08-07 12:23:06 +0000243 new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,
Chris Wilson9066f832013-10-02 11:12:53 +0100244 GFP_KERNEL);
245 if (new_edid)
246 edid = new_edid;
Carsten Emdeda0df922012-03-18 22:37:33 +0100247 }
248
Carsten Emdeda0df922012-03-18 22:37:33 +0100249 DRM_INFO("Got %s EDID base block and %d extension%s from "
Andy Shevchenko7a5cf522016-03-17 14:22:23 -0700250 "\"%s\" for connector \"%s\"\n", (builtin >= 0) ? "built-in" :
Carsten Emdeda0df922012-03-18 22:37:33 +0100251 "external", valid_extensions, valid_extensions == 1 ? "" : "s",
252 name, connector_name);
253
Carsten Emdeda0df922012-03-18 22:37:33 +0100254out:
Markus Elfring9084acf2014-11-19 16:33:17 +0100255 release_firmware(fw);
Jani Nikula451023d2012-08-15 09:32:39 +0000256 return edid;
Carsten Emdeda0df922012-03-18 22:37:33 +0100257}
258
Jani Nikula07c2b842017-02-17 17:20:51 +0200259struct edid *drm_load_edid_firmware(struct drm_connector *connector)
Carsten Emdeda0df922012-03-18 22:37:33 +0100260{
Jani Nikula25933822014-06-03 14:56:20 +0300261 const char *connector_name = connector->name;
Bob Paauwe96206e22015-08-27 10:04:13 -0700262 char *edidname, *last, *colon, *fwstr, *edidstr, *fallback = NULL;
Jani Nikula451023d2012-08-15 09:32:39 +0000263 struct edid *edid;
Carsten Emdeda0df922012-03-18 22:37:33 +0100264
Bob Paauwe96206e22015-08-27 10:04:13 -0700265 if (edid_firmware[0] == '\0')
Jani Nikula07c2b842017-02-17 17:20:51 +0200266 return ERR_PTR(-ENOENT);
Carsten Emdeda0df922012-03-18 22:37:33 +0100267
Bob Paauwe96206e22015-08-27 10:04:13 -0700268 /*
269 * If there are multiple edid files specified and separated
270 * by commas, search through the list looking for one that
271 * matches the connector.
272 *
Valdis Kletnieksc67f6952016-05-30 02:26:38 -0400273 * If there's one or more that doesn't specify a connector, keep
Bob Paauwe96206e22015-08-27 10:04:13 -0700274 * the last one found one as a fallback.
275 */
276 fwstr = kstrdup(edid_firmware, GFP_KERNEL);
277 edidstr = fwstr;
278
279 while ((edidname = strsep(&edidstr, ","))) {
280 colon = strchr(edidname, ':');
281 if (colon != NULL) {
282 if (strncmp(connector_name, edidname, colon - edidname))
283 continue;
284 edidname = colon + 1;
285 break;
286 }
287
288 if (*edidname != '\0') /* corner case: multiple ',' */
289 fallback = edidname;
290 }
291
292 if (!edidname) {
293 if (!fallback) {
294 kfree(fwstr);
Jani Nikula07c2b842017-02-17 17:20:51 +0200295 return ERR_PTR(-ENOENT);
Bob Paauwe96206e22015-08-27 10:04:13 -0700296 }
297 edidname = fallback;
Carsten Emdeda0df922012-03-18 22:37:33 +0100298 }
299
300 last = edidname + strlen(edidname) - 1;
301 if (*last == '\n')
302 *last = '\0';
303
Geert Uytterhoevence456e02013-11-19 12:15:05 +0100304 edid = edid_load(connector, edidname, connector_name);
Bob Paauwe96206e22015-08-27 10:04:13 -0700305 kfree(fwstr);
306
Jani Nikula07c2b842017-02-17 17:20:51 +0200307 return edid;
Carsten Emdeda0df922012-03-18 22:37:33 +0100308}