drm/i915: Make intel_digital_port_connected() work for any port

Add the missing port A handling to intel_digital_port_connected()
and also separate SPT from the CPT/LPT code a bit.

Cc: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170615171252.11921-1-ville.syrjala@linux.intel.com
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 7a3a42c..2eb6e0f 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4444,8 +4444,6 @@ static bool ibx_digital_port_connected(struct drm_i915_private *dev_priv,
        u32 bit;
 
        switch (port->port) {
-       case PORT_A:
-               return true;
        case PORT_B:
                bit = SDE_PORTB_HOTPLUG;
                break;
@@ -4469,8 +4467,6 @@ static bool cpt_digital_port_connected(struct drm_i915_private *dev_priv,
        u32 bit;
 
        switch (port->port) {
-       case PORT_A:
-               return true;
        case PORT_B:
                bit = SDE_PORTB_HOTPLUG_CPT;
                break;
@@ -4480,12 +4476,28 @@ static bool cpt_digital_port_connected(struct drm_i915_private *dev_priv,
        case PORT_D:
                bit = SDE_PORTD_HOTPLUG_CPT;
                break;
+       default:
+               MISSING_CASE(port->port);
+               return false;
+       }
+
+       return I915_READ(SDEISR) & bit;
+}
+
+static bool spt_digital_port_connected(struct drm_i915_private *dev_priv,
+                                      struct intel_digital_port *port)
+{
+       u32 bit;
+
+       switch (port->port) {
+       case PORT_A:
+               bit = SDE_PORTA_HOTPLUG_SPT;
+               break;
        case PORT_E:
                bit = SDE_PORTE_HOTPLUG_SPT;
                break;
        default:
-               MISSING_CASE(port->port);
-               return false;
+               return cpt_digital_port_connected(dev_priv, port);
        }
 
        return I915_READ(SDEISR) & bit;
@@ -4537,6 +4549,42 @@ static bool gm45_digital_port_connected(struct drm_i915_private *dev_priv,
        return I915_READ(PORT_HOTPLUG_STAT) & bit;
 }
 
+static bool ilk_digital_port_connected(struct drm_i915_private *dev_priv,
+                                      struct intel_digital_port *port)
+{
+       if (port->port == PORT_A)
+               return I915_READ(DEISR) & DE_DP_A_HOTPLUG;
+       else
+               return ibx_digital_port_connected(dev_priv, port);
+}
+
+static bool snb_digital_port_connected(struct drm_i915_private *dev_priv,
+                                      struct intel_digital_port *port)
+{
+       if (port->port == PORT_A)
+               return I915_READ(DEISR) & DE_DP_A_HOTPLUG;
+       else
+               return cpt_digital_port_connected(dev_priv, port);
+}
+
+static bool ivb_digital_port_connected(struct drm_i915_private *dev_priv,
+                                      struct intel_digital_port *port)
+{
+       if (port->port == PORT_A)
+               return I915_READ(DEISR) & DE_DP_A_HOTPLUG_IVB;
+       else
+               return cpt_digital_port_connected(dev_priv, port);
+}
+
+static bool bdw_digital_port_connected(struct drm_i915_private *dev_priv,
+                                      struct intel_digital_port *port)
+{
+       if (port->port == PORT_A)
+               return I915_READ(GEN8_DE_PORT_ISR) & GEN8_PORT_DP_A_HOTPLUG;
+       else
+               return cpt_digital_port_connected(dev_priv, port);
+}
+
 static bool bxt_digital_port_connected(struct drm_i915_private *dev_priv,
                                       struct intel_digital_port *intel_dig_port)
 {
@@ -4573,16 +4621,25 @@ static bool bxt_digital_port_connected(struct drm_i915_private *dev_priv,
 bool intel_digital_port_connected(struct drm_i915_private *dev_priv,
                                  struct intel_digital_port *port)
 {
-       if (HAS_PCH_IBX(dev_priv))
-               return ibx_digital_port_connected(dev_priv, port);
-       else if (HAS_PCH_SPLIT(dev_priv))
-               return cpt_digital_port_connected(dev_priv, port);
+       if (HAS_GMCH_DISPLAY(dev_priv)) {
+               if (IS_GM45(dev_priv))
+                       return gm45_digital_port_connected(dev_priv, port);
+               else
+                       return g4x_digital_port_connected(dev_priv, port);
+       }
+
+       if (IS_GEN5(dev_priv))
+               return ilk_digital_port_connected(dev_priv, port);
+       else if (IS_GEN6(dev_priv))
+               return snb_digital_port_connected(dev_priv, port);
+       else if (IS_GEN7(dev_priv))
+               return ivb_digital_port_connected(dev_priv, port);
+       else if (IS_GEN8(dev_priv))
+               return bdw_digital_port_connected(dev_priv, port);
        else if (IS_GEN9_LP(dev_priv))
                return bxt_digital_port_connected(dev_priv, port);
-       else if (IS_GM45(dev_priv))
-               return gm45_digital_port_connected(dev_priv, port);
        else
-               return g4x_digital_port_connected(dev_priv, port);
+               return spt_digital_port_connected(dev_priv, port);
 }
 
 static struct edid *