From dee39287396d6be622ac6e76917e7ebb742e3ae7 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Thu, 18 Nov 2010 09:32:58 +0800 Subject: [PATCH] drm/i915: Always set the DP transcoder config to 8BPC. commit 220cad3cbf553f893432919b458da36489373fc6 upstream. The pipe is always set to 8BPC, but here we were leaving whatever previous bits were set by the BIOS in place. Signed-off-by: Eric Anholt Tested-by: Keith Packard Signed-off-by: Chris Wilson Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_display.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) 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; -- 2.34.1