summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorDave Airlie <airlied@redhat.com>2012-03-18 10:10:50 +0000
committerDave Airlie <airlied@redhat.com>2012-03-20 08:45:01 +0000
commitabc8113fe56948858ff44f4b1795875be0cb5e99 (patch)
tree4a6bb8aa46824ac9f66eea29974d082adb0a044b
parent3c12513d2f5f0e9abb65be3d422d43ebee5f17d7 (diff)
downloadop-kernel-dev-abc8113fe56948858ff44f4b1795875be0cb5e99.zip
op-kernel-dev-abc8113fe56948858ff44f4b1795875be0cb5e99.tar.gz
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>
-rw-r--r--drivers/gpu/drm/radeon/atombios_dp.c3
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 552b436..191218a 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);
OpenPOWER on IntegriCloud