Commit 9c9e7927 authored by Adam Jackson's avatar Adam Jackson Committed by Eric Anholt
Browse files

drm/i915: Set sync polarity correctly on DisplayPort 



Probably only matters for format-converting dongles, but might as well
get it right all the time.

Signed-off-by: default avatarAdam Jackson <ajax@redhat.com>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent ab00a9ef

drivers/gpu/drm/i915/intel_dp.c

+6 −3
Original line number Diff line number Diff line
@@ -638,9 +638,12 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, 
	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);



	dp_priv->DP = (DP_VOLTAGE_0_4 |

			DP_PRE_EMPHASIS_0 |

			DP_SYNC_VS_HIGH |

			DP_SYNC_HS_HIGH);

		       DP_PRE_EMPHASIS_0);



	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)

		dp_priv->DP |= DP_SYNC_HS_HIGH;

	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)

		dp_priv->DP |= DP_SYNC_VS_HIGH;



	if (HAS_PCH_CPT(dev) && !IS_eDP(intel_encoder))

		dp_priv->DP |= DP_LINK_TRAIN_OFF_CPT;

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