1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
|
/*
drm_edid_load.c: use a built-in EDID data set or load it via the firmware
interface
Copyright (C) 2012 Carsten Emde <C.Emde@osadl.org>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/module.h>
#include <linux/firmware.h>
#include "drmP.h"
#include "drm_crtc.h"
#include "drm_crtc_helper.h"
#include "drm_edid.h"
static char edid_firmware[PATH_MAX];
module_param_string(edid_firmware, edid_firmware, sizeof(edid_firmware), 0644);
MODULE_PARM_DESC(edid_firmware, "Do not probe monitor, use specified EDID blob "
"from built-in data or /lib/firmware instead. ");
#define GENERIC_EDIDS 4
static char *generic_edid_name[GENERIC_EDIDS] = {
"edid/1024x768.bin",
"edid/1280x1024.bin",
"edid/1680x1050.bin",
"edid/1920x1080.bin",
};
static u8 generic_edid[GENERIC_EDIDS][128] = {
{
0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x05, 0x16, 0x01, 0x03, 0x6d, 0x23, 0x1a, 0x78,
0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
0x20, 0x50, 0x54, 0x00, 0x08, 0x00, 0x61, 0x40,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x64, 0x19,
0x00, 0x40, 0x41, 0x00, 0x26, 0x30, 0x08, 0x90,
0x36, 0x00, 0x63, 0x0a, 0x11, 0x00, 0x00, 0x18,
0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
0x3d, 0x2f, 0x31, 0x07, 0x00, 0x0a, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x58,
0x47, 0x41, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x55,
},
{
0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x05, 0x16, 0x01, 0x03, 0x6d, 0x2c, 0x23, 0x78,
0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0x81, 0x80,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x30, 0x2a,
0x00, 0x98, 0x51, 0x00, 0x2a, 0x40, 0x30, 0x70,
0x13, 0x00, 0xbc, 0x63, 0x11, 0x00, 0x00, 0x1e,
0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
0x3d, 0x3e, 0x40, 0x0b, 0x00, 0x0a, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53,
0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xa0,
},
{
0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x05, 0x16, 0x01, 0x03, 0x6d, 0x2b, 0x1b, 0x78,
0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xb3, 0x00,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x21, 0x39,
0x90, 0x30, 0x62, 0x1a, 0x27, 0x40, 0x68, 0xb0,
0x36, 0x00, 0xb5, 0x11, 0x11, 0x00, 0x00, 0x1e,
0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
0x3d, 0x40, 0x42, 0x0f, 0x00, 0x0a, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x57,
0x53, 0x58, 0x47, 0x41, 0x0a, 0x20, 0x00, 0x26,
},
{
0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
0x31, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x05, 0x16, 0x01, 0x03, 0x6d, 0x32, 0x1c, 0x78,
0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xd1, 0xc0,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x3a,
0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
0x45, 0x00, 0xf4, 0x19, 0x11, 0x00, 0x00, 0x1e,
0x00, 0x00, 0x00, 0xff, 0x00, 0x4c, 0x69, 0x6e,
0x75, 0x78, 0x20, 0x23, 0x30, 0x0a, 0x20, 0x20,
0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x3b,
0x3d, 0x42, 0x44, 0x0f, 0x00, 0x0a, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x46,
0x48, 0x44, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x05,
},
};
static int edid_load(struct drm_connector *connector, char *name,
char *connector_name)
{
const struct firmware *fw;
struct platform_device *pdev;
u8 *fwdata = NULL, *edid;
int fwsize, expected;
int builtin = 0, err = 0;
int i, valid_extensions = 0;
pdev = platform_device_register_simple(connector_name, -1, NULL, 0);
if (IS_ERR(pdev)) {
DRM_ERROR("Failed to register EDID firmware platform device "
"for connector \"%s\"\n", connector_name);
err = -EINVAL;
goto out;
}
err = request_firmware(&fw, name, &pdev->dev);
platform_device_unregister(pdev);
if (err) {
i = 0;
while (i < GENERIC_EDIDS && strcmp(name, generic_edid_name[i]))
i++;
if (i < GENERIC_EDIDS) {
err = 0;
builtin = 1;
fwdata = generic_edid[i];
fwsize = sizeof(generic_edid[i]);
}
}
if (err) {
DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n",
name, err);
goto out;
}
if (fwdata == NULL) {
fwdata = (u8 *) fw->data;
fwsize = fw->size;
}
expected = (fwdata[0x7e] + 1) * EDID_LENGTH;
if (expected != fwsize) {
DRM_ERROR("Size of EDID firmware \"%s\" is invalid "
"(expected %d, got %d)\n", name, expected, (int) fwsize);
err = -EINVAL;
goto relfw_out;
}
edid = kmalloc(fwsize, GFP_KERNEL);
if (edid == NULL) {
err = -ENOMEM;
goto relfw_out;
}
memcpy(edid, fwdata, fwsize);
if (!drm_edid_block_valid(edid, 0)) {
DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",
name);
kfree(edid);
err = -EINVAL;
goto relfw_out;
}
for (i = 1; i <= edid[0x7e]; i++) {
if (i != valid_extensions + 1)
memcpy(edid + (valid_extensions + 1) * EDID_LENGTH,
edid + i * EDID_LENGTH, EDID_LENGTH);
if (drm_edid_block_valid(edid + i * EDID_LENGTH, i))
valid_extensions++;
}
if (valid_extensions != edid[0x7e]) {
edid[EDID_LENGTH-1] += edid[0x7e] - valid_extensions;
DRM_INFO("Found %d valid extensions instead of %d in EDID data "
"\"%s\" for connector \"%s\"\n", valid_extensions,
edid[0x7e], name, connector_name);
edid[0x7e] = valid_extensions;
edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,
GFP_KERNEL);
if (edid == NULL) {
err = -ENOMEM;
goto relfw_out;
}
}
connector->display_info.raw_edid = edid;
DRM_INFO("Got %s EDID base block and %d extension%s from "
"\"%s\" for connector \"%s\"\n", builtin ? "built-in" :
"external", valid_extensions, valid_extensions == 1 ? "" : "s",
name, connector_name);
relfw_out:
release_firmware(fw);
out:
return err;
}
int drm_load_edid_firmware(struct drm_connector *connector)
{
char *connector_name = drm_get_connector_name(connector);
char *edidname = edid_firmware, *last, *colon;
int ret = 0;
if (*edidname == '\0')
return ret;
colon = strchr(edidname, ':');
if (colon != NULL) {
if (strncmp(connector_name, edidname, colon - edidname))
return ret;
edidname = colon + 1;
if (*edidname == '\0')
return ret;
}
last = edidname + strlen(edidname) - 1;
if (*last == '\n')
*last = '\0';
ret = edid_load(connector, edidname, connector_name);
if (ret)
return 0;
drm_mode_connector_update_edid_property(connector,
(struct edid *) connector->display_info.raw_edid);
return drm_add_edid_modes(connector, (struct edid *)
connector->display_info.raw_edid);
}
|
