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Commit 9962c925 authored by Adam Jackson's avatar Adam Jackson Committed by Eric Anholt
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drm/i915/dp: Only enable enhanced framing if the sink supports it 



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

Signed-off-by: default avatarAdam Jackson <ajax@redhat.com>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent 9908ff73

drivers/gpu/drm/i915/intel_dp.c

+2 −3
Original line number Diff line number Diff line
@@ -675,10 +675,9 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, 
	dp_priv->link_configuration[1] = dp_priv->lane_count;



	/*

	 * Check for DPCD version > 1.1,

	 * enable enahanced frame stuff in that case

	 * Check for DPCD version > 1.1 and enhanced framing support

	 */

	if (dp_priv->dpcd[0] >= 0x11) {

	if (dp_priv->dpcd[0] >= 0x11 && (dp_priv->dpcd[2] & DP_ENHANCED_FRAME_CAP)) {

		dp_priv->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;

		dp_priv->DP |= DP_ENHANCED_FRAMING;

	}