318 lines
10 KiB
C
318 lines
10 KiB
C
|
/*
|
||
|
|
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 <drm/drmP.h>
|
||
|
|
#include <drm/drm_crtc.h>
|
||
|
|
#include <drm/drm_crtc_helper.h>
|
||
|
|
#include <drm/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 6
|
||
|
|
static const char * const generic_edid_name[GENERIC_EDIDS] = {
|
||
|
|
"edid/800x600.bin",
|
||
|
|
"edid/1024x768.bin",
|
||
|
|
"edid/1280x1024.bin",
|
||
|
|
"edid/1600x1200.bin",
|
||
|
|
"edid/1680x1050.bin",
|
||
|
|
"edid/1920x1080.bin",
|
||
|
|
};
|
||
|
|
|
||
|
|
static const 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, 0x1b, 0x14, 0x78,
|
||
|
|
0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
|
||
|
|
0x20, 0x50, 0x54, 0x01, 0x00, 0x00, 0x45, 0x40,
|
||
|
|
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||
|
|
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0xa0, 0x0f,
|
||
|
|
0x20, 0x00, 0x31, 0x58, 0x1c, 0x20, 0x28, 0x80,
|
||
|
|
0x14, 0x00, 0x15, 0xd0, 0x10, 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, 0x24, 0x26, 0x05, 0x00, 0x0a, 0x20, 0x20,
|
||
|
|
0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
|
||
|
|
0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x53,
|
||
|
|
0x56, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0xc2,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
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, 0x37, 0x29, 0x78,
|
||
|
|
0xea, 0x5e, 0xc0, 0xa4, 0x59, 0x4a, 0x98, 0x25,
|
||
|
|
0x20, 0x50, 0x54, 0x00, 0x00, 0x00, 0xa9, 0x40,
|
||
|
|
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
||
|
|
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x48, 0x3f,
|
||
|
|
0x40, 0x30, 0x62, 0xb0, 0x32, 0x40, 0x40, 0xc0,
|
||
|
|
0x13, 0x00, 0x2b, 0xa0, 0x21, 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, 0x4a, 0x4c, 0x11, 0x00, 0x0a, 0x20, 0x20,
|
||
|
|
0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc,
|
||
|
|
0x00, 0x4c, 0x69, 0x6e, 0x75, 0x78, 0x20, 0x55,
|
||
|
|
0x58, 0x47, 0x41, 0x0a, 0x20, 0x20, 0x00, 0x9d,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
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_size(const u8 *edid, int data_size)
|
||
|
|
{
|
||
|
|
if (data_size < EDID_LENGTH)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
return (edid[0x7e] + 1) * EDID_LENGTH;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void *edid_load(struct drm_connector *connector, const char *name,
|
||
|
|
const char *connector_name)
|
||
|
|
{
|
||
|
|
const struct firmware *fw = NULL;
|
||
|
|
const u8 *fwdata;
|
||
|
|
u8 *edid;
|
||
|
|
int fwsize, builtin;
|
||
|
|
int i, valid_extensions = 0;
|
||
|
|
bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS);
|
||
|
|
|
||
|
|
builtin = match_string(generic_edid_name, GENERIC_EDIDS, name);
|
||
|
|
if (builtin >= 0) {
|
||
|
|
fwdata = generic_edid[builtin];
|
||
|
|
fwsize = sizeof(generic_edid[builtin]);
|
||
|
|
} else {
|
||
|
|
struct platform_device *pdev;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
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);
|
||
|
|
return ERR_CAST(pdev);
|
||
|
|
}
|
||
|
|
|
||
|
|
err = request_firmware(&fw, name, &pdev->dev);
|
||
|
|
platform_device_unregister(pdev);
|
||
|
|
if (err) {
|
||
|
|
DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n",
|
||
|
|
name, err);
|
||
|
|
return ERR_PTR(err);
|
||
|
|
}
|
||
|
|
|
||
|
|
fwdata = fw->data;
|
||
|
|
fwsize = fw->size;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (edid_size(fwdata, fwsize) != fwsize) {
|
||
|
|
DRM_ERROR("Size of EDID firmware \"%s\" is invalid "
|
||
|
|
"(expected %d, got %d\n", name,
|
||
|
|
edid_size(fwdata, fwsize), (int)fwsize);
|
||
|
|
edid = ERR_PTR(-EINVAL);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
edid = kmemdup(fwdata, fwsize, GFP_KERNEL);
|
||
|
|
if (edid == NULL) {
|
||
|
|
edid = ERR_PTR(-ENOMEM);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!drm_edid_block_valid(edid, 0, print_bad_edid,
|
||
|
|
&connector->edid_corrupt)) {
|
||
|
|
connector->bad_edid_counter++;
|
||
|
|
DRM_ERROR("Base block of EDID firmware \"%s\" is invalid ",
|
||
|
|
name);
|
||
|
|
kfree(edid);
|
||
|
|
edid = ERR_PTR(-EINVAL);
|
||
|
|
goto 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,
|
||
|
|
print_bad_edid,
|
||
|
|
NULL))
|
||
|
|
valid_extensions++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (valid_extensions != edid[0x7e]) {
|
||
|
|
u8 *new_edid;
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (new_edid)
|
||
|
|
edid = new_edid;
|
||
|
|
}
|
||
|
|
|
||
|
|
DRM_INFO("Got %s EDID base block and %d extension%s from "
|
||
|
|
"\"%s\" for connector \"%s\"\n", (builtin >= 0) ? "built-in" :
|
||
|
|
"external", valid_extensions, valid_extensions == 1 ? "" : "s",
|
||
|
|
name, connector_name);
|
||
|
|
|
||
|
|
out:
|
||
|
|
release_firmware(fw);
|
||
|
|
return edid;
|
||
|
|
}
|
||
|
|
|
||
|
|
int drm_load_edid_firmware(struct drm_connector *connector)
|
||
|
|
{
|
||
|
|
const char *connector_name = connector->name;
|
||
|
|
char *edidname, *last, *colon, *fwstr, *edidstr, *fallback = NULL;
|
||
|
|
int ret;
|
||
|
|
struct edid *edid;
|
||
|
|
|
||
|
|
if (edid_firmware[0] == '\0')
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If there are multiple edid files specified and separated
|
||
|
|
* by commas, search through the list looking for one that
|
||
|
|
* matches the connector.
|
||
|
|
*
|
||
|
|
* If there's one or more that doesn't specify a connector, keep
|
||
|
|
* the last one found one as a fallback.
|
||
|
|
*/
|
||
|
|
fwstr = kstrdup(edid_firmware, GFP_KERNEL);
|
||
|
|
edidstr = fwstr;
|
||
|
|
|
||
|
|
while ((edidname = strsep(&edidstr, ","))) {
|
||
|
|
colon = strchr(edidname, ':');
|
||
|
|
if (colon != NULL) {
|
||
|
|
if (strncmp(connector_name, edidname, colon - edidname))
|
||
|
|
continue;
|
||
|
|
edidname = colon + 1;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (*edidname != '\0') /* corner case: multiple ',' */
|
||
|
|
fallback = edidname;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!edidname) {
|
||
|
|
if (!fallback) {
|
||
|
|
kfree(fwstr);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
edidname = fallback;
|
||
|
|
}
|
||
|
|
|
||
|
|
last = edidname + strlen(edidname) - 1;
|
||
|
|
if (*last == '\n')
|
||
|
|
*last = '\0';
|
||
|
|
|
||
|
|
edid = edid_load(connector, edidname, connector_name);
|
||
|
|
kfree(fwstr);
|
||
|
|
|
||
|
|
if (IS_ERR_OR_NULL(edid))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
drm_mode_connector_update_edid_property(connector, edid);
|
||
|
|
ret = drm_add_edid_modes(connector, edid);
|
||
|
|
drm_edid_to_eld(connector, edid);
|
||
|
|
kfree(edid);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|