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Commit abc8113f authored by Dave Airlie's avatar Dave Airlie
Browse files

drm/radeon: dp only enable enhanced framing if sink supports. 



DisplayPort spec v1.1a, Table 2-52.

Same commit to Intel by ajax in 9962c925

Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 3c12513d

drivers/gpu/drm/radeon/atombios_dp.c

+2 −1
Original line number Diff line number Diff line
@@ -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);