blob: 732cb6f8e653f58dee7102f0bb11b797cde2f5ad [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
Chris Wilson9066f832013-10-02 11:12:53 +010035static const char *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
Chris Wilson9066f832013-10-02 11:12:53 +0100173 builtin = 0;
174 for (i = 0; i < GENERIC_EDIDS; i++) {
175 if (strcmp(name, generic_edid_name[i]) == 0) {
Carsten Emdeda0df922012-03-18 22:37:33 +0100176 fwdata = generic_edid[i];
177 fwsize = sizeof(generic_edid[i]);
Chris Wilson9066f832013-10-02 11:12:53 +0100178 builtin = 1;
179 break;
Carsten Emdeda0df922012-03-18 22:37:33 +0100180 }
181 }
Chris Wilson9066f832013-10-02 11:12:53 +0100182 if (!builtin) {
183 struct platform_device *pdev;
184 int err;
Carsten Emdeda0df922012-03-18 22:37:33 +0100185
Chris Wilson9066f832013-10-02 11:12:53 +0100186 pdev = platform_device_register_simple(connector_name, -1, NULL, 0);
187 if (IS_ERR(pdev)) {
188 DRM_ERROR("Failed to register EDID firmware platform device "
189 "for connector \"%s\"\n", connector_name);
190 return ERR_CAST(pdev);
191 }
Carsten Emdeda0df922012-03-18 22:37:33 +0100192
Chris Wilson9066f832013-10-02 11:12:53 +0100193 err = request_firmware(&fw, name, &pdev->dev);
194 platform_device_unregister(pdev);
195 if (err) {
196 DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n",
197 name, err);
198 return ERR_PTR(err);
199 }
200
201 fwdata = fw->data;
Carsten Emdeda0df922012-03-18 22:37:33 +0100202 fwsize = fw->size;
203 }
204
Chris Wilson9066f832013-10-02 11:12:53 +0100205 if (edid_size(fwdata, fwsize) != fwsize) {
Carsten Emdeda0df922012-03-18 22:37:33 +0100206 DRM_ERROR("Size of EDID firmware \"%s\" is invalid "
Chris Wilson9066f832013-10-02 11:12:53 +0100207 "(expected %d, got %d\n", name,
208 edid_size(fwdata, fwsize), (int)fwsize);
209 edid = ERR_PTR(-EINVAL);
210 goto out;
Carsten Emdeda0df922012-03-18 22:37:33 +0100211 }
212
Thomas Meyer8d06cd02013-05-22 21:06:30 +0000213 edid = kmemdup(fwdata, fwsize, GFP_KERNEL);
Carsten Emdeda0df922012-03-18 22:37:33 +0100214 if (edid == NULL) {
Chris Wilson9066f832013-10-02 11:12:53 +0100215 edid = ERR_PTR(-ENOMEM);
216 goto out;
Carsten Emdeda0df922012-03-18 22:37:33 +0100217 }
Carsten Emdeda0df922012-03-18 22:37:33 +0100218
Jerome Glisse0b2443e2012-08-09 11:25:51 -0400219 if (!drm_edid_block_valid(edid, 0, print_bad_edid)) {
220 connector->bad_edid_counter++;
Carsten Emdeda0df922012-03-18 22:37:33 +0100221 DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",
222 name);
223 kfree(edid);
Chris Wilson9066f832013-10-02 11:12:53 +0100224 edid = ERR_PTR(-EINVAL);
225 goto out;
Carsten Emdeda0df922012-03-18 22:37:33 +0100226 }
227
228 for (i = 1; i <= edid[0x7e]; i++) {
229 if (i != valid_extensions + 1)
230 memcpy(edid + (valid_extensions + 1) * EDID_LENGTH,
231 edid + i * EDID_LENGTH, EDID_LENGTH);
Jerome Glisse0b2443e2012-08-09 11:25:51 -0400232 if (drm_edid_block_valid(edid + i * EDID_LENGTH, i, print_bad_edid))
Carsten Emdeda0df922012-03-18 22:37:33 +0100233 valid_extensions++;
234 }
235
236 if (valid_extensions != edid[0x7e]) {
Chris Wilson9066f832013-10-02 11:12:53 +0100237 u8 *new_edid;
238
Carsten Emdeda0df922012-03-18 22:37:33 +0100239 edid[EDID_LENGTH-1] += edid[0x7e] - valid_extensions;
240 DRM_INFO("Found %d valid extensions instead of %d in EDID data "
241 "\"%s\" for connector \"%s\"\n", valid_extensions,
242 edid[0x7e], name, connector_name);
243 edid[0x7e] = valid_extensions;
Chris Wilson9066f832013-10-02 11:12:53 +0100244
Alexey Khoroshilovf7b83b92012-08-07 12:23:06 +0000245 new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,
Chris Wilson9066f832013-10-02 11:12:53 +0100246 GFP_KERNEL);
247 if (new_edid)
248 edid = new_edid;
Carsten Emdeda0df922012-03-18 22:37:33 +0100249 }
250
Carsten Emdeda0df922012-03-18 22:37:33 +0100251 DRM_INFO("Got %s EDID base block and %d extension%s from "
252 "\"%s\" for connector \"%s\"\n", builtin ? "built-in" :
253 "external", valid_extensions, valid_extensions == 1 ? "" : "s",
254 name, connector_name);
255
Carsten Emdeda0df922012-03-18 22:37:33 +0100256out:
Markus Elfring9084acf2014-11-19 16:33:17 +0100257 release_firmware(fw);
Jani Nikula451023d2012-08-15 09:32:39 +0000258 return edid;
Carsten Emdeda0df922012-03-18 22:37:33 +0100259}
260
261int drm_load_edid_firmware(struct drm_connector *connector)
262{
Jani Nikula25933822014-06-03 14:56:20 +0300263 const char *connector_name = connector->name;
Carsten Emdeda0df922012-03-18 22:37:33 +0100264 char *edidname = edid_firmware, *last, *colon;
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200265 int ret;
Jani Nikula451023d2012-08-15 09:32:39 +0000266 struct edid *edid;
Carsten Emdeda0df922012-03-18 22:37:33 +0100267
268 if (*edidname == '\0')
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200269 return 0;
Carsten Emdeda0df922012-03-18 22:37:33 +0100270
271 colon = strchr(edidname, ':');
272 if (colon != NULL) {
273 if (strncmp(connector_name, edidname, colon - edidname))
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200274 return 0;
Carsten Emdeda0df922012-03-18 22:37:33 +0100275 edidname = colon + 1;
276 if (*edidname == '\0')
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200277 return 0;
Carsten Emdeda0df922012-03-18 22:37:33 +0100278 }
279
280 last = edidname + strlen(edidname) - 1;
281 if (*last == '\n')
282 *last = '\0';
283
Geert Uytterhoevence456e02013-11-19 12:15:05 +0100284 edid = edid_load(connector, edidname, connector_name);
Jani Nikula451023d2012-08-15 09:32:39 +0000285 if (IS_ERR_OR_NULL(edid))
Carsten Emdeda0df922012-03-18 22:37:33 +0100286 return 0;
287
Jani Nikula451023d2012-08-15 09:32:39 +0000288 drm_mode_connector_update_edid_property(connector, edid);
289 ret = drm_add_edid_modes(connector, edid);
290 kfree(edid);
Carsten Emdeda0df922012-03-18 22:37:33 +0100291
Jani Nikula451023d2012-08-15 09:32:39 +0000292 return ret;
Carsten Emdeda0df922012-03-18 22:37:33 +0100293}