diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2011-09-22 18:47:23 +0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2011-09-23 17:02:18 +0400 |
| commit | fdfc61594e6de21c23f955818ef78bcab9bafe40 (patch) | |
| tree | 5d09bbe04ddd4a881a3008ec102d824fca41cd71 /drivers/gpu/drm/radeon/radeon_encoders.c | |
| parent | d9ad77ebfd3a304306f9f18ff3f9e522da075e27 (diff) | |
| download | linux-fdfc61594e6de21c23f955818ef78bcab9bafe40.tar.xz | |
drm/radeon/kms: fix DDIA enable on some rs690 systems
DVOOutputControl checks the value of of bios scratch reg 3
on some tables and assumes the encoder is already enabled
if the DFP2_ACTIVE bit is set. Clear that bit so the table
sets the DDIA enable bit properly.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_encoders.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_encoders.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c index 319d85d7e759..13690f3eb4a4 100644 --- a/drivers/gpu/drm/radeon/radeon_encoders.c +++ b/drivers/gpu/drm/radeon/radeon_encoders.c @@ -1507,7 +1507,14 @@ radeon_atom_encoder_dpms(struct drm_encoder *encoder, int mode) switch (mode) { case DRM_MODE_DPMS_ON: args.ucAction = ATOM_ENABLE; - atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args); + /* workaround for DVOOutputControl on some RS690 systems */ + if (radeon_encoder->encoder_id == ENCODER_OBJECT_ID_INTERNAL_DDI) { + u32 reg = RREG32(RADEON_BIOS_3_SCRATCH); + WREG32(RADEON_BIOS_3_SCRATCH, reg & ~ATOM_S3_DFP2I_ACTIVE); + atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args); + WREG32(RADEON_BIOS_3_SCRATCH, reg); + } else + atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args); if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) { args.ucAction = ATOM_LCD_BLON; atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args); |