[Intel-gfx] [PATCH 5/7] drm/i915: enable LVDS on Cougarpoint

[Zhenyu Wang]

Fix the transcoder select bit for LVDS on CPT.

Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 89479e2..d658d6e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3598,8 +3598,16 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
 
 		lvds = I915_READ(lvds_reg);
 		lvds |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
-		if (pipe == 1)
-			lvds |= LVDS_PIPEB_SELECT;
+		if (HAS_PCH_CPT(dev))
+			lvds &= ~PORT_TRANS_SEL_MASK;
+		else
+			lvds &= ~LVDS_PIPEB_SELECT;
+		if (pipe == 1) {
+			if (HAS_PCH_CPT(dev))
+				lvds |= PORT_TRANS_B_SEL_CPT;
+			else
+				lvds |= LVDS_PIPEB_SELECT;
+		}
 		/* set the corresponsding LVDS_BORDER bit */
 		lvds |= dev_priv->lvds_border_bits;
 		/* Set the B0-B3 data pairs corresponding to whether we're going to
-- 
1.6.3.3