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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 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}
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_connector.h>
15#include <drm/drm_drv.h>
16#include <drm/drm_edid.h>
17#include <drm/drm_print.h>
18
19#include "drm_crtc_internal.h"
20
21static char edid_firmware[PATH_MAX];
22module_param_string(edid_firmware, edid_firmware, sizeof(edid_firmware), 0644);
23MODULE_PARM_DESC(edid_firmware, "Do not probe monitor, use specified EDID blob "
24 "from built-in data or /lib/firmware instead. ");
25
26#define GENERIC_EDIDS 6
27static const char * const generic_edid_name[GENERIC_EDIDS] = {
28 "edid/800x600.bin",
29 "edid/1024x768.bin",
30 "edid/1280x1024.bin",
31 "edid/1600x1200.bin",
32 "edid/1680x1050.bin",
33 "edid/1920x1080.bin",
34};
35
36static const u8 generic_edid[GENERIC_EDIDS][128] = {
37 {
38 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
39 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
40 0x05, 0x16, 0x01, 0x03, 0x6d, 0x1b, 0x14, 0x78,
41 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
42 0x20, 0x50, 0x54, 0x01, 0x00, 0x00, 0x45, 0x40,
43 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
44 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0xa0, 0x0f,
45 0x20, 0x00, 0x31, 0x58, 0x1c, 0x20, 0x28, 0x80,
46 0x14, 0x00, 0x15, 0xd0, 0x10, 0x00, 0x00, 0x1e,
47 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
48 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
49 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
50 0x3d, 0x24, 0x26, 0x05, 0x00, 0x0a, 0x20, 0x20,
51 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
52 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53,
53 0x56, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xc2,
54 },
55 {
56 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
57 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
58 0x05, 0x16, 0x01, 0x03, 0x6d, 0x23, 0x1a, 0x78,
59 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
60 0x20, 0x50, 0x54, 0x00, 0x08, 0x00, 0x61, 0x40,
61 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
62 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x64, 0x19,
63 0x00, 0x40, 0x41, 0x00, 0x26, 0x30, 0x08, 0x90,
64 0x36, 0x00, 0x63, 0x0a, 0x11, 0x00, 0x00, 0x18,
65 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
66 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
67 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
68 0x3d, 0x2f, 0x31, 0x07, 0x00, 0x0a, 0x20, 0x20,
69 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
70 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x58,
71 0x47, 0x41, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x55,
72 },
73 {
74 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
75 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
76 0x05, 0x16, 0x01, 0x03, 0x6d, 0x2c, 0x23, 0x78,
77 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
78 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0x81, 0x80,
79 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
80 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x30, 0x2a,
81 0x00, 0x98, 0x51, 0x00, 0x2a, 0x40, 0x30, 0x70,
82 0x13, 0x00, 0xbc, 0x63, 0x11, 0x00, 0x00, 0x1e,
83 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
84 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
85 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
86 0x3d, 0x3e, 0x40, 0x0b, 0x00, 0x0a, 0x20, 0x20,
87 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
88 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53,
89 0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xa0,
90 },
91 {
92 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
93 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
94 0x05, 0x16, 0x01, 0x03, 0x6d, 0x37, 0x29, 0x78,
95 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
96 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xa9, 0x40,
97 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
98 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x48, 0x3f,
99 0x40, 0x30, 0x62, 0xb0, 0x32, 0x40, 0x40, 0xc0,
100 0x13, 0x00, 0x2b, 0xa0, 0x21, 0x00, 0x00, 0x1e,
101 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
102 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
103 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
104 0x3d, 0x4a, 0x4c, 0x11, 0x00, 0x0a, 0x20, 0x20,
105 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
106 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x55,
107 0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0x9d,
108 },
109 {
110 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
111 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
112 0x05, 0x16, 0x01, 0x03, 0x6d, 0x2b, 0x1b, 0x78,
113 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
114 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xb3, 0x00,
115 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
116 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x21, 0x39,
117 0x90, 0x30, 0x62, 0x1a, 0x27, 0x40, 0x68, 0xb0,
118 0x36, 0x00, 0xb5, 0x11, 0x11, 0x00, 0x00, 0x1e,
119 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
120 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
121 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
122 0x3d, 0x40, 0x42, 0x0f, 0x00, 0x0a, 0x20, 0x20,
123 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
124 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x57,
125 0x53, 0x58, 0x47, 0x41, 0x0a, 0x20, 0x00, 0x26,
126 },
127 {
128 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
129 0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
130 0x05, 0x16, 0x01, 0x03, 0x6d, 0x32, 0x1c, 0x78,
131 0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
132 0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xd1, 0xc0,
133 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
134 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x3a,
135 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
136 0x45, 0x00, 0xf4, 0x19, 0x11, 0x00, 0x00, 0x1e,
137 0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
138 0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
139 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
140 0x3d, 0x42, 0x44, 0x0f, 0x00, 0x0a, 0x20, 0x20,
141 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
142 0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x46,
143 0x48, 0x44, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x05,
144 },
145};
146
147static const struct drm_edid *edid_load(struct drm_connector *connector, const char *name)
148{
149 const struct firmware *fw = NULL;
150 const u8 *fwdata;
151 const struct drm_edid *drm_edid;
152 int fwsize, builtin;
153
154 builtin = match_string(generic_edid_name, GENERIC_EDIDS, name);
155 if (builtin >= 0) {
156 fwdata = generic_edid[builtin];
157 fwsize = sizeof(generic_edid[builtin]);
158 } else {
159 int err;
160
161 err = request_firmware(&fw, name, connector->dev->dev);
162 if (err) {
163 drm_err(connector->dev,
164 "[CONNECTOR:%d:%s] Requesting EDID firmware \"%s\" failed (err=%d)\n",
165 connector->base.id, connector->name,
166 name, err);
167 return ERR_PTR(err);
168 }
169
170 fwdata = fw->data;
171 fwsize = fw->size;
172 }
173
174 drm_dbg_kms(connector->dev, "[CONNECTOR:%d:%s] Loaded %s firmware EDID \"%s\"\n",
175 connector->base.id, connector->name,
176 builtin >= 0 ? "built-in" : "external", name);
177
178 drm_edid = drm_edid_alloc(fwdata, fwsize);
179 if (!drm_edid_valid(drm_edid)) {
180 drm_err(connector->dev, "Invalid firmware EDID \"%s\"\n", name);
181 drm_edid_free(drm_edid);
182 drm_edid = ERR_PTR(-EINVAL);
183 }
184
185 release_firmware(fw);
186
187 return drm_edid;
188}
189
190const struct drm_edid *drm_edid_load_firmware(struct drm_connector *connector)
191{
192 char *edidname, *last, *colon, *fwstr, *edidstr, *fallback = NULL;
193 const struct drm_edid *drm_edid;
194
195 if (edid_firmware[0] == '\0')
196 return ERR_PTR(-ENOENT);
197
198 /*
199 * If there are multiple edid files specified and separated
200 * by commas, search through the list looking for one that
201 * matches the connector.
202 *
203 * If there's one or more that doesn't specify a connector, keep
204 * the last one found one as a fallback.
205 */
206 fwstr = kstrdup(edid_firmware, GFP_KERNEL);
207 if (!fwstr)
208 return ERR_PTR(-ENOMEM);
209 edidstr = fwstr;
210
211 while ((edidname = strsep(&edidstr, ","))) {
212 colon = strchr(edidname, ':');
213 if (colon != NULL) {
214 if (strncmp(connector->name, edidname, colon - edidname))
215 continue;
216 edidname = colon + 1;
217 break;
218 }
219
220 if (*edidname != '\0') /* corner case: multiple ',' */
221 fallback = edidname;
222 }
223
224 if (!edidname) {
225 if (!fallback) {
226 kfree(fwstr);
227 return ERR_PTR(-ENOENT);
228 }
229 edidname = fallback;
230 }
231
232 last = edidname + strlen(edidname) - 1;
233 if (*last == '\n')
234 *last = '\0';
235
236 drm_edid = edid_load(connector, edidname);
237
238 kfree(fwstr);
239
240 return drm_edid;
241}