From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
IBX BSpec says we must specify 8bpc in TRANSCONF for both 8bpc
and 12bpc HDMI output. Do so.
v2: Pass intel_crtc to intel_pipe_has_type()
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 96ce8f6..a392188 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2001,11 +2001,15 @@ static void ironlake_enable_pch_transcoder(struct drm_i915_private *dev_priv,
if (HAS_PCH_IBX(dev_priv->dev)) {
/*
- * make the BPC in transcoder be consistent with
- * that in pipeconf reg.
+ * Make the BPC in transcoder be consistent with
+ * that in pipeconf reg. For HDMI we must use 8bpc
+ * here for both 8bpc and 12bpc.
*/
val &= ~PIPECONF_BPC_MASK;
- val |= pipeconf_val & PIPECONF_BPC_MASK;
+ if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_HDMI))
+ val |= PIPECONF_8BPC;
+ else
+ val |= pipeconf_val & PIPECONF_BPC_MASK;
}
val &= ~TRANS_INTERLACE_MASK;
--
2.0.5
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