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linux/drivers/gpu/drm/drm_edid_load.c
Linus Torvalds 612a9aab56 Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 
Pull drm merge (part 1) from Dave Airlie:
 "So first of all my tree and uapi stuff has a conflict mess, its my
  fault as the nouveau stuff didn't hit -next as were trying to rebase
  regressions out of it before we merged.

  Highlights:
   - SH mobile modesetting driver and associated helpers
   - some DRM core documentation
   - i915 modesetting rework, haswell hdmi, haswell and vlv fixes, write
     combined pte writing, ilk rc6 support,
   - nouveau: major driver rework into a hw core driver, makes features
     like SLI a lot saner to implement,
   - psb: add eDP/DP support for Cedarview
   - radeon: 2 layer page tables, async VM pte updates, better PLL
     selection for > 2 screens, better ACPI interactions

  The rest is general grab bag of fixes.

  So why part 1? well I have the exynos pull req which came in a bit
  late but was waiting for me to do something they shouldn't have and it
  looks fairly safe, and David Howells has some more header cleanups
  he'd like me to pull, that seem like a good idea, but I'd like to get
  this merge out of the way so -next dosen't get blocked."

Tons of conflicts mostly due to silly include line changes, but mostly
mindless.  A few other small semantic conflicts too, noted from Dave's
pre-merged branch.

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (447 commits)
  drm/nv98/crypt: fix fuc build with latest envyas
  drm/nouveau/devinit: fixup various issues with subdev ctor/init ordering
  drm/nv41/vm: fix and enable use of "real" pciegart
  drm/nv44/vm: fix and enable use of "real" pciegart
  drm/nv04/dmaobj: fixup vm target handling in preparation for nv4x pcie
  drm/nouveau: store supported dma mask in vmmgr
  drm/nvc0/ibus: initial implementation of subdev
  drm/nouveau/therm: add support for fan-control modes
  drm/nouveau/hwmon: rename pwm0* to pmw1* to follow hwmon's rules
  drm/nouveau/therm: calculate the pwm divisor on nv50+
  drm/nouveau/fan: rewrite the fan tachometer driver to get more precision, faster
  drm/nouveau/therm: move thermal-related functions to the therm subdev
  drm/nouveau/bios: parse the pwm divisor from the perf table
  drm/nouveau/therm: use the EXTDEV table to detect i2c monitoring devices
  drm/nouveau/therm: rework thermal table parsing
  drm/nouveau/gpio: expose the PWM/TOGGLE parameter found in the gpio vbios table
  drm/nouveau: fix pm initialization order
  drm/nouveau/bios: check that fixed tvdac gpio data is valid before using it
  drm/nouveau: log channel debug/error messages from client object rather than drm client
  drm/nouveau: have drm debugging macros build on top of core macros
  ...
2012-10-03 23:29:23 -07:00

258 lines
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C
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/*
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 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 u8 *edid_load(struct drm_connector *connector, char *name,
char *connector_name)
{
const struct firmware *fw;
struct platform_device *pdev;
u8 *fwdata = NULL, *edid, *new_edid;
int fwsize, expected;
int builtin = 0, err = 0;
int i, valid_extensions = 0;
bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS);
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, print_bad_edid)) {
connector->bad_edid_counter++;
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, print_bad_edid))
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;
new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH,
GFP_KERNEL);
if (new_edid == NULL) {
err = -ENOMEM;
kfree(edid);
goto relfw_out;
}
edid = new_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:
if (err)
return ERR_PTR(err);
return edid;
}
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;
struct edid *edid;
if (*edidname == '\0')
return 0;
colon = strchr(edidname, ':');
if (colon != NULL) {
if (strncmp(connector_name, edidname, colon - edidname))
return 0;
edidname = colon + 1;
if (*edidname == '\0')
return 0;
}
last = edidname + strlen(edidname) - 1;
if (*last == '\n')
*last = '\0';
edid = (struct edid *) edid_load(connector, edidname, connector_name);
if (IS_ERR_OR_NULL(edid))
return 0;
drm_mode_connector_update_edid_property(connector, edid);
ret = drm_add_edid_modes(connector, edid);
kfree(edid);
return ret;
}
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