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>

drivers/gpu/drm/i915/intel_crt.c

@@ -152,17 +152,13 @@ static void intel_crt_mode_set(struct drm_encoder *encoder,
 	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 		adpa |= ADPA_VSYNC_ACTIVE_HIGH;
 
-	if (intel_crtc->pipe == 0) {
+	/* For CPT allow 3 pipe config, for others just use A or B */
 	if (HAS_PCH_CPT(dev))
-			adpa |= PORT_TRANS_A_SEL_CPT;
-		else
+		adpa |= PORT_TRANS_SEL_CPT(intel_crtc->pipe);
+	else if (intel_crtc->pipe == 0)
 		adpa |= ADPA_PIPE_A_SELECT;
-	} else {
-		if (HAS_PCH_CPT(dev))
-			adpa |= PORT_TRANS_B_SEL_CPT;
 	else
 		adpa |= ADPA_PIPE_B_SELECT;
-	}
 
 	if (!HAS_PCH_SPLIT(dev))
 		I915_WRITE(BCLRPAT(intel_crtc->pipe), 0);

drivers/gpu/drm/i915/intel_hdmi.c

@@ -252,12 +252,10 @@ static void intel_hdmi_mode_set(struct drm_encoder *encoder,
 		intel_write_eld(encoder, adjusted_mode);
 	}
 
-	if (intel_crtc->pipe == 1) {
 	if (HAS_PCH_CPT(dev))
-			sdvox |= PORT_TRANS_B_SEL_CPT;
-		else
+		sdvox |= PORT_TRANS_SEL_CPT(intel_crtc->pipe);
+	else if (intel_crtc->pipe == 1)
 		sdvox |= SDVO_PIPE_B_SELECT;
-	}
 
 	I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
 	POSTING_READ(intel_hdmi->sdvox_reg);