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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: Adam Jackson <ajax@redhat.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
hifive-unleashed-5.1
Adam Jackson 2010-04-05 17:57:59 -04:00 committed by Eric Anholt
parent ab00a9ef8d
commit 9c9e792795
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/i915/intel_dp.c
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@ -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;