From: Alex Deucher <alexander.deucher@xxxxxxx>
vbios is missing a ddc entry for the DVI-D port.
Reported by ponyofdeath on IRC.
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
drivers/gpu/drm/radeon/radeon_combios.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index 81fc100..b9ad45e 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -2152,6 +2152,7 @@ static bool radeon_apply_legacy_quirks(struct drm_device *dev,
struct radeon_i2c_bus_rec *ddc_i2c,
struct radeon_hpd *hpd)
{
+ struct radeon_device *rdev = dev->dev_private;
/* Certain IBM chipset RN50s have a BIOS reporting two VGAs,
one with VGA DDC and one with CRT2 DDC. - kill the CRT2 DDC one */
@@ -2170,6 +2171,14 @@ static bool radeon_apply_legacy_quirks(struct drm_device *dev,
return false;
}
+ /* ASUS RS400 system with missing DVI port DDC */
+ if (dev->pdev->device == 0x5A41 &&
+ dev->pdev->subsystem_vendor == 0x1043 &&
+ dev->pdev->subsystem_device == 0x81C8) {
+ if (*legacy_connector == CONNECTOR_DVI_D_LEGACY)
+ *ddc_i2c = combios_setup_i2c_bus(rdev, DDC_MONID, 0, 0);
+ }
+
return true;
}
--
1.7.3.4
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