diff options
| author |   Dave Airlie <airlied@redhat.com> | 2012-03-18 10:10:50 +0000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2012-03-20 08:45:01 +0000 |
| commit | abc8113fe56948858ff44f4b1795875be0cb5e99 (patch) | |
| tree | 4a6bb8aa46824ac9f66eea29974d082adb0a044b /drivers/gpu/drm/radeon/atombios_dp.c | |
| parent | drm/radeon/kms: skip db/cb/streamout checking when possible on r600 (diff) | |
| download | linux-dev-abc8113fe56948858ff44f4b1795875be0cb5e99.tar.xz linux-dev-abc8113fe56948858ff44f4b1795875be0cb5e99.zip | |
drm/radeon: dp only enable enhanced framing if sink supports.
DisplayPort spec v1.1a, Table 2-52.
Same commit to Intel by ajax in 9962c9252e46eda7058067cbe73bdf1ed74b0d37
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_dp.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_dp.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index 552b436451fd..191218ad92e7 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -746,7 +746,8 @@ static int radeon_dp_link_train_init(struct radeon_dp_link_train_info *dp_info) /* set the lane count on the sink */ tmp = dp_info->dp_lane_count; - if (dp_info->dpcd[0] >= 0x11) + if (dp_info->dpcd[DP_DPCD_REV] >= 0x11 && + dp_info->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP) tmp |= DP_LANE_COUNT_ENHANCED_FRAME_EN; radeon_write_dpcd_reg(dp_info->radeon_connector, DP_LANE_COUNT_SET, tmp); |