drm/i915: add port parameter to intel_hdmi_init

Instead of having a giant if cascade to figure this out according to
the passed-in register. We could do quite a bit more cleaning up and
all by using the port at more places, but I think this should be part
of a bigger rework to introduce a struct intel_digital_port which
would keep track of all these things. I guess this will be part of
some haswell-DP-induced refactoring.

For now this rips out the big cascade, which is what annoyed me so
much.

v2: Add port variable name back for the func decl (I've tried to trick
myself below the 80 char limit).

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_ddi.c

@@ -250,7 +250,7 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
 	case PORT_B:
 	case PORT_C:
 	case PORT_D:
-		intel_hdmi_init(dev, DDI_BUF_CTL(port));
+		intel_hdmi_init(dev, DDI_BUF_CTL(port), port);
 		break;
 	default:
 		DRM_DEBUG_DRIVER("No handlers defined for port %d, skipping DDI initialization\n",

drivers/gpu/drm/i915/intel_display.c

@@ -6798,16 +6798,16 @@ static void intel_setup_outputs(struct drm_device *dev)
 			/* PCH SDVOB multiplex with HDMIB */
 			found = intel_sdvo_init(dev, PCH_SDVOB, true);
 			if (!found)
-				intel_hdmi_init(dev, HDMIB);
+				intel_hdmi_init(dev, HDMIB, PORT_B);
 			if (!found && (I915_READ(PCH_DP_B) & DP_DETECTED))
 				intel_dp_init(dev, PCH_DP_B);
 		}
 
 		if (I915_READ(HDMIC) & PORT_DETECTED)
-			intel_hdmi_init(dev, HDMIC);
+			intel_hdmi_init(dev, HDMIC, PORT_C);
 
 		if (!dpd_is_edp && I915_READ(HDMID) & PORT_DETECTED)
-			intel_hdmi_init(dev, HDMID);
+			intel_hdmi_init(dev, HDMID, PORT_D);
 
 		if (I915_READ(PCH_DP_C) & DP_DETECTED)
 			intel_dp_init(dev, PCH_DP_C);
@@ -6821,13 +6821,13 @@ static void intel_setup_outputs(struct drm_device *dev)
 			/* SDVOB multiplex with HDMIB */
 			found = intel_sdvo_init(dev, SDVOB, true);
 			if (!found)
-				intel_hdmi_init(dev, SDVOB);
+				intel_hdmi_init(dev, SDVOB, PORT_B);
 			if (!found && (I915_READ(DP_B) & DP_DETECTED))
 				intel_dp_init(dev, DP_B);
 		}
 
 		if (I915_READ(SDVOC) & PORT_DETECTED)
-			intel_hdmi_init(dev, SDVOC);
+			intel_hdmi_init(dev, SDVOC, PORT_C);
 
 		/* Shares lanes with HDMI on SDVOC */
 		if (I915_READ(DP_C) & DP_DETECTED)
@@ -6840,7 +6840,7 @@ static void intel_setup_outputs(struct drm_device *dev)
 			found = intel_sdvo_init(dev, SDVOB, true);
 			if (!found && SUPPORTS_INTEGRATED_HDMI(dev)) {
 				DRM_DEBUG_KMS("probing HDMI on SDVOB\n");
-				intel_hdmi_init(dev, SDVOB);
+				intel_hdmi_init(dev, SDVOB, PORT_B);
 			}
 
 			if (!found && SUPPORTS_INTEGRATED_DP(dev)) {
@@ -6860,7 +6860,7 @@ static void intel_setup_outputs(struct drm_device *dev)
 
 			if (SUPPORTS_INTEGRATED_HDMI(dev)) {
 				DRM_DEBUG_KMS("probing HDMI on SDVOC\n");
-				intel_hdmi_init(dev, SDVOC);
+				intel_hdmi_init(dev, SDVOC, PORT_C);
 			}
 			if (SUPPORTS_INTEGRATED_DP(dev)) {
 				DRM_DEBUG_KMS("probing DP_C\n");

drivers/gpu/drm/i915/intel_drv.h

@@ -364,7 +364,8 @@ extern void intel_attach_force_audio_property(struct drm_connector *connector);
 extern void intel_attach_broadcast_rgb_property(struct drm_connector *connector);
 
 extern void intel_crt_init(struct drm_device *dev);
-extern void intel_hdmi_init(struct drm_device *dev, int sdvox_reg);
+extern void intel_hdmi_init(struct drm_device *dev,
+			    int sdvox_reg, enum port port);
 extern struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder);
 extern void intel_dip_infoframe_csum(struct dip_infoframe *avi_if);
 extern bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg,

drivers/gpu/drm/i915/intel_hdmi.c

@@ -889,7 +889,7 @@ intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *c
 	intel_attach_broadcast_rgb_property(connector);
 }
 
-void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
+void intel_hdmi_init(struct drm_device *dev, int sdvox_reg, enum port port)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_connector *connector;
@@ -925,40 +925,23 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 
 	intel_encoder->cloneable = false;
 
-	/* Set up the DDC bus. */
-	if (sdvox_reg == SDVOB) {
+	intel_hdmi->ddi_port = port;
+	switch (port) {
+	case PORT_B:
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == SDVOC) {
-		intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
-		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == HDMIB) {
-		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
-		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == HDMIC) {
-		intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
-		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == HDMID) {
-		intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
-		dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == DDI_BUF_CTL(PORT_B)) {
-		DRM_DEBUG_DRIVER("LPT: detected output on DDI B\n");
-		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
-		intel_hdmi->ddi_port = PORT_B;
-		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == DDI_BUF_CTL(PORT_C)) {
-		DRM_DEBUG_DRIVER("LPT: detected output on DDI C\n");
+		break;
+	case PORT_C:
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
-		intel_hdmi->ddi_port = PORT_C;
 		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
-	} else if (sdvox_reg == DDI_BUF_CTL(PORT_D)) {
-		DRM_DEBUG_DRIVER("LPT: detected output on DDI D\n");
+		break;
+	case PORT_D:
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
-		intel_hdmi->ddi_port = PORT_D;
 		dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
-	} else {
-		/* If we got an unknown sdvox_reg, things are pretty much broken
-		 * in a way that we should let the kernel know about it */
+		break;
+	case PORT_A:
+		/* Internal port only for eDP. */
+	default:
 		BUG();
 	}