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-rw-r--r--drivers/gpu/drm/i915/i915_reg.h1
-rw-r--r--drivers/gpu/drm/i915/intel_display.c4
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 249addb98a3e..cda89f49b5b2 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2953,6 +2953,7 @@
#define TRANS_DP_10BPC (1<<9)
#define TRANS_DP_6BPC (2<<9)
#define TRANS_DP_12BPC (3<<9)
+#define TRANS_DP_BPC_MASK (3<<9)
#define TRANS_DP_VSYNC_ACTIVE_HIGH (1<<4)
#define TRANS_DP_VSYNC_ACTIVE_LOW 0
#define TRANS_DP_HSYNC_ACTIVE_HIGH (1<<3)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e92ba16f7d79..932a061f28d0 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2044,9 +2044,11 @@ static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode)
reg = I915_READ(trans_dp_ctl);
reg &= ~(TRANS_DP_PORT_SEL_MASK |
- TRANS_DP_SYNC_MASK);
+ TRANS_DP_SYNC_MASK |
+ TRANS_DP_BPC_MASK);
reg |= (TRANS_DP_OUTPUT_ENABLE |
TRANS_DP_ENH_FRAMING);
+ reg |= TRANS_DP_8BPC;
if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
reg |= TRANS_DP_HSYNC_ACTIVE_HIGH;