diff options
| author | Alex Deucher <alexdeucher@gmail.com> | 2010-02-05 04:21:19 -0500 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2010-02-09 09:31:20 +1000 |
| commit | 3c537889e17232e9073f75ae8710ea0f008c5a29 (patch) | |
| tree | 9d3c25825b466b8ddc3fdc8224d4484c99173b08 /drivers/gpu/drm/radeon/radeon_combios.c | |
| parent | 2739d49cd7f1f44876cad614b072da698967b370 (diff) | |
drm/radeon/kms: add support for hardcoded edids in rom (v2)
Some servers hardcode an edid in rom so that they will
work properly with KVMs. This is a port of the relevant
code from the ddx.
[airlied: reworked to validate edid at boot stage - and
remove special quirk, if there is a valid EDID in the BIOS rom
we'll just try and use it.]
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_combios.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_combios.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c index e208d730f51..257ce1774e4 100644 --- a/drivers/gpu/drm/radeon/radeon_combios.c +++ b/drivers/gpu/drm/radeon/radeon_combios.c @@ -443,6 +443,39 @@ static uint16_t combios_get_table_offset(struct drm_device *dev, } +bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev) +{ + int edid_info; + struct edid *edid; + edid_info = combios_get_table_offset(rdev->ddev, COMBIOS_HARDCODED_EDID_TABLE); + if (!edid_info) + return false; + + edid = kmalloc(EDID_LENGTH * (DRM_MAX_EDID_EXT_NUM + 1), + GFP_KERNEL); + if (edid == NULL) + return false; + + memcpy((unsigned char *)edid, + (unsigned char *)(rdev->bios + edid_info), EDID_LENGTH); + + if (!drm_edid_is_valid(edid)) { + kfree(edid); + return false; + } + + rdev->mode_info.bios_hardcoded_edid = edid; + return true; +} + +struct edid * +radeon_combios_get_hardcoded_edid(struct radeon_device *rdev) +{ + if (rdev->mode_info.bios_hardcoded_edid) + return rdev->mode_info.bios_hardcoded_edid; + return NULL; +} + static struct radeon_i2c_bus_rec combios_setup_i2c_bus(struct radeon_device *rdev, int ddc_line) { |