drm/i915: use transcoder select bits on VGA and HDMI on CPT

Required for 3 pipe functionality.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: Eugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 451534c..fee0ad0 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -152,17 +152,13 @@
 	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 		adpa |= ADPA_VSYNC_ACTIVE_HIGH;
 
-	if (intel_crtc->pipe == 0) {
-		if (HAS_PCH_CPT(dev))
-			adpa |= PORT_TRANS_A_SEL_CPT;
-		else
-			adpa |= ADPA_PIPE_A_SELECT;
-	} else {
-		if (HAS_PCH_CPT(dev))
-			adpa |= PORT_TRANS_B_SEL_CPT;
-		else
-			adpa |= ADPA_PIPE_B_SELECT;
-	}
+	/* For CPT allow 3 pipe config, for others just use A or B */
+	if (HAS_PCH_CPT(dev))
+		adpa |= PORT_TRANS_SEL_CPT(intel_crtc->pipe);
+	else if (intel_crtc->pipe == 0)
+		adpa |= ADPA_PIPE_A_SELECT;
+	else
+		adpa |= ADPA_PIPE_B_SELECT;
 
 	if (!HAS_PCH_SPLIT(dev))
 		I915_WRITE(BCLRPAT(intel_crtc->pipe), 0);