[PATCH 07/36] drm/i915: use the right FDI_RX_CTL register on Haswell

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

There is only one PCH transcoder, so it's always _FDI_RXA_CTL. Using
"pipe" here is wrong.

While at it, also reuse the rx_ctl_val variable created in the
previous commit.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 39a53b4..c397da3 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -153,8 +153,7 @@ void hsw_fdi_link_train(struct drm_crtc *crtc)
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	int pipe = intel_crtc->pipe;
-	u32 reg, temp, i, rx_ctl_val;
+	u32 temp, i, rx_ctl_val;
 
 	/* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed at the
 	 * mode set "sequence for CRT port" document:
@@ -199,17 +198,10 @@ void hsw_fdi_link_train(struct drm_crtc *crtc)
 
 		udelay(600);
 
-		/* Enable CPU FDI Receiver with auto-training */
-		reg = FDI_RX_CTL(pipe);
-		I915_WRITE(reg,
-				I915_READ(reg) |
-					FDI_LINK_TRAIN_AUTO |
-					FDI_RX_ENABLE |
-					FDI_LINK_TRAIN_PATTERN_1_CPT |
-					FDI_RX_ENHANCE_FRAME_ENABLE |
-					FDI_PORT_WIDTH_2X_LPT |
-					FDI_RX_PLL_ENABLE);
-		POSTING_READ(reg);
+		/* Enable PCH FDI Receiver with auto-training */
+		rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO;
+		I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
+		POSTING_READ(_FDI_RXA_CTL);
 		udelay(100);
 
 		temp = I915_READ(DP_TP_STATUS(PORT_E));
@@ -231,9 +223,9 @@ void hsw_fdi_link_train(struct drm_crtc *crtc)
 			I915_WRITE(DP_TP_CTL(PORT_E),
 					I915_READ(DP_TP_CTL(PORT_E)) &
 						~DP_TP_CTL_ENABLE);
-			I915_WRITE(FDI_RX_CTL(pipe),
-					I915_READ(FDI_RX_CTL(pipe)) &
-						~FDI_RX_PLL_ENABLE);
+
+			rx_ctl_val &= ~FDI_RX_PLL_ENABLE;
+			I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
 			continue;
 		}
 	}
-- 
1.7.11.4