blob: 1b4c7a5442c5de22210925c2cea8317790340b04 [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
Carsten Emde8091ee52013-04-06 16:01:34 +000034#define GENERIC_EDIDS 5
Chris Wilson9066f832013-10-02 11:12:53 +010035static const char *generic_edid_name[GENERIC_EDIDS] = {
Carsten Emdeda0df922012-03-18 22:37:33 +010036 "edid/1024x768.bin",
37 "edid/1280x1024.bin",
Carsten Emde8091ee52013-04-06 16:01:34 +000038 "edid/1600x1200.bin",
Carsten Emdeda0df922012-03-18 22:37:33 +010039 "edid/1680x1050.bin",
40 "edid/1920x1080.bin",
41};
42
Chris Wilson9066f832013-10-02 11:12:53 +010043static const u8 generic_edid[GENERIC_EDIDS][128] = {
Carsten Emdeda0df922012-03-18 22:37:33 +010044 {
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,
Carsten Emde8091ee52013-04-06 16:01:34 +000083 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,
Carsten Emdeda0df922012-03-18 22:37:33 +0100101 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
Chris Wilson9066f832013-10-02 11:12:53 +0100136static 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
Geert Uytterhoevence456e02013-11-19 12:15:05 +0100144static void *edid_load(struct drm_connector *connector, const char *name,
Linus Torvalds496fd152013-07-10 14:21:46 -0700145 const char *connector_name)
Carsten Emdeda0df922012-03-18 22:37:33 +0100146{
Chris Wilson9066f832013-10-02 11:12:53 +0100147 const struct firmware *fw = NULL;
148 const u8 *fwdata;
149 u8 *edid;
150 int fwsize, builtin;
Carsten Emdeda0df922012-03-18 22:37:33 +0100151 int i, valid_extensions = 0;
Jerome Glisse0b2443e2012-08-09 11:25:51 -0400152 bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS);
Carsten Emdeda0df922012-03-18 22:37:33 +0100153
Chris Wilson9066f832013-10-02 11:12:53 +0100154 builtin = 0;
155 for (i = 0; i < GENERIC_EDIDS; i++) {
156 if (strcmp(name, generic_edid_name[i]) == 0) {
Carsten Emdeda0df922012-03-18 22:37:33 +0100157 fwdata = generic_edid[i];
158 fwsize = sizeof(generic_edid[i]);
Chris Wilson9066f832013-10-02 11:12:53 +0100159 builtin = 1;
160 break;
Carsten Emdeda0df922012-03-18 22:37:33 +0100161 }
162 }
Chris Wilson9066f832013-10-02 11:12:53 +0100163 if (!builtin) {
164 struct platform_device *pdev;
165 int err;
Carsten Emdeda0df922012-03-18 22:37:33 +0100166
Chris Wilson9066f832013-10-02 11:12:53 +0100167 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 }
Carsten Emdeda0df922012-03-18 22:37:33 +0100173
Chris Wilson9066f832013-10-02 11:12:53 +0100174 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;
Carsten Emdeda0df922012-03-18 22:37:33 +0100183 fwsize = fw->size;
184 }
185
Chris Wilson9066f832013-10-02 11:12:53 +0100186 if (edid_size(fwdata, fwsize) != fwsize) {
Carsten Emdeda0df922012-03-18 22:37:33 +0100187 DRM_ERROR("Size of EDID firmware \"%s\" is invalid "
Chris Wilson9066f832013-10-02 11:12:53 +0100188 "(expected %d, got %d\n", name,
189 edid_size(fwdata, fwsize), (int)fwsize);
190 edid = ERR_PTR(-EINVAL);
191 goto out;
Carsten Emdeda0df922012-03-18 22:37:33 +0100192 }
193
Thomas Meyer8d06cd02013-05-22 21:06:30 +0000194 edid = kmemdup(fwdata, fwsize, GFP_KERNEL);
Carsten Emdeda0df922012-03-18 22:37:33 +0100195 if (edid == NULL) {
Chris Wilson9066f832013-10-02 11:12:53 +0100196 edid = ERR_PTR(-ENOMEM);
197 goto out;
Carsten Emdeda0df922012-03-18 22:37:33 +0100198 }
Carsten Emdeda0df922012-03-18 22:37:33 +0100199
Jerome Glisse0b2443e2012-08-09 11:25:51 -0400200 if (!drm_edid_block_valid(edid, 0, print_bad_edid)) {
201 connector->bad_edid_counter++;
Carsten Emdeda0df922012-03-18 22:37:33 +0100202 DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",
203 name);
204 kfree(edid);
Chris Wilson9066f832013-10-02 11:12:53 +0100205 edid = ERR_PTR(-EINVAL);
206 goto out;
Carsten Emdeda0df922012-03-18 22:37:33 +0100207 }
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);
Jerome Glisse0b2443e2012-08-09 11:25:51 -0400213 if (drm_edid_block_valid(edid + i * EDID_LENGTH, i, print_bad_edid))
Carsten Emdeda0df922012-03-18 22:37:33 +0100214 valid_extensions++;
215 }
216
217 if (valid_extensions != edid[0x7e]) {
Chris Wilson9066f832013-10-02 11:12:53 +0100218 u8 *new_edid;
219
Carsten Emdeda0df922012-03-18 22:37:33 +0100220 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;
Chris Wilson9066f832013-10-02 11:12:53 +0100225
Alexey Khoroshilovf7b83b92012-08-07 12:23:06 +0000226 new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,
Chris Wilson9066f832013-10-02 11:12:53 +0100227 GFP_KERNEL);
228 if (new_edid)
229 edid = new_edid;
Carsten Emdeda0df922012-03-18 22:37:33 +0100230 }
231
Carsten Emdeda0df922012-03-18 22:37:33 +0100232 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
Carsten Emdeda0df922012-03-18 22:37:33 +0100237out:
Chris Wilson9066f832013-10-02 11:12:53 +0100238 if (fw)
239 release_firmware(fw);
Jani Nikula451023d2012-08-15 09:32:39 +0000240 return edid;
Carsten Emdeda0df922012-03-18 22:37:33 +0100241}
242
243int drm_load_edid_firmware(struct drm_connector *connector)
244{
Linus Torvalds496fd152013-07-10 14:21:46 -0700245 const char *connector_name = drm_get_connector_name(connector);
Carsten Emdeda0df922012-03-18 22:37:33 +0100246 char *edidname = edid_firmware, *last, *colon;
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200247 int ret;
Jani Nikula451023d2012-08-15 09:32:39 +0000248 struct edid *edid;
Carsten Emdeda0df922012-03-18 22:37:33 +0100249
250 if (*edidname == '\0')
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200251 return 0;
Carsten Emdeda0df922012-03-18 22:37:33 +0100252
253 colon = strchr(edidname, ':');
254 if (colon != NULL) {
255 if (strncmp(connector_name, edidname, colon - edidname))
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200256 return 0;
Carsten Emdeda0df922012-03-18 22:37:33 +0100257 edidname = colon + 1;
258 if (*edidname == '\0')
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200259 return 0;
Carsten Emdeda0df922012-03-18 22:37:33 +0100260 }
261
262 last = edidname + strlen(edidname) - 1;
263 if (*last == '\n')
264 *last = '\0';
265
Geert Uytterhoevence456e02013-11-19 12:15:05 +0100266 edid = edid_load(connector, edidname, connector_name);
Jani Nikula451023d2012-08-15 09:32:39 +0000267 if (IS_ERR_OR_NULL(edid))
Carsten Emdeda0df922012-03-18 22:37:33 +0100268 return 0;
269
Jani Nikula451023d2012-08-15 09:32:39 +0000270 drm_mode_connector_update_edid_property(connector, edid);
271 ret = drm_add_edid_modes(connector, edid);
272 kfree(edid);
Carsten Emdeda0df922012-03-18 22:37:33 +0100273
Jani Nikula451023d2012-08-15 09:32:39 +0000274 return ret;
Carsten Emdeda0df922012-03-18 22:37:33 +0100275}