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>

4 files changed, 22 insertions, 38 deletions

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 933c74859172..32604ac80204 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/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",
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5c0a72606225..e86fd3977f73 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/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");
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 76ba554f6592..d234f1af5db5 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/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,
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 593b8fe2e00a..e4c37bb572e8 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/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();
         }