drm/i915/cnl: Add HPD support for Port F.

On CNP boards that are using DDI F,
bit 25 (SDE_PORTE_HOTPLUG_SPT) is representing
the Digital Port F hotplug line when the Digital
Port F hotplug detect input is enabled.

v2: Reuse all existent structure instead of adding a
new HPD_PORT_F pointing to pin of port E.
v3: Use IS_CNL_WITH_PORT_F so we can start upstreaming
    this right now. If that SKU ever get a proper name
    we come back and update it.
v4: Rebase on top of digital connected port using encoder
    instead of port.
v5: Moved IS_CNL_WITH_PORT_F definition to the PCI IDs patch.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180129232223.766-8-rodrigo.vivi@intel.com

drivers/gpu/drm/i915/i915_drv.h

@@ -2958,8 +2958,10 @@ void intel_hpd_irq_handler(struct drm_i915_private *dev_priv,
 void intel_hpd_init(struct drm_i915_private *dev_priv);
 void intel_hpd_init_work(struct drm_i915_private *dev_priv);
 void intel_hpd_cancel_work(struct drm_i915_private *dev_priv);
-enum port intel_hpd_pin_to_port(enum hpd_pin pin);
-enum hpd_pin intel_hpd_pin(enum port port);
+enum port intel_hpd_pin_to_port(struct drm_i915_private *dev_priv,
+				enum hpd_pin pin);
+enum hpd_pin intel_hpd_pin_default(struct drm_i915_private *dev_priv,
+				   enum port port);
 bool intel_hpd_disable(struct drm_i915_private *dev_priv, enum hpd_pin pin);
 void intel_hpd_enable(struct drm_i915_private *dev_priv, enum hpd_pin pin);
 

drivers/gpu/drm/i915/i915_irq.c

@@ -1574,10 +1574,11 @@ static bool i9xx_port_hotplug_long_detect(enum port port, u32 val)
  *
  * Note that the caller is expected to zero out the masks initially.
  */
-static void intel_get_hpd_pins(u32 *pin_mask, u32 *long_mask,
-			     u32 hotplug_trigger, u32 dig_hotplug_reg,
-			     const u32 hpd[HPD_NUM_PINS],
-			     bool long_pulse_detect(enum port port, u32 val))
+static void intel_get_hpd_pins(struct drm_i915_private *dev_priv,
+			       u32 *pin_mask, u32 *long_mask,
+			       u32 hotplug_trigger, u32 dig_hotplug_reg,
+			       const u32 hpd[HPD_NUM_PINS],
+			       bool long_pulse_detect(enum port port, u32 val))
 {
 	enum port port;
 	int i;
@@ -1588,7 +1589,7 @@ static void intel_get_hpd_pins(u32 *pin_mask, u32 *long_mask,
 
 		*pin_mask |= BIT(i);
 
-		port = intel_hpd_pin_to_port(i);
+		port = intel_hpd_pin_to_port(dev_priv, i);
 		if (port == PORT_NONE)
 			continue;
 
@@ -1976,8 +1977,9 @@ static void i9xx_hpd_irq_handler(struct drm_i915_private *dev_priv,
 		u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_G4X;
 
 		if (hotplug_trigger) {
-			intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
-					   hotplug_trigger, hpd_status_g4x,
+			intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
+					   hotplug_trigger, hotplug_trigger,
+					   hpd_status_g4x,
 					   i9xx_port_hotplug_long_detect);
 
 			intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
@@ -1989,8 +1991,9 @@ static void i9xx_hpd_irq_handler(struct drm_i915_private *dev_priv,
 		u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
 
 		if (hotplug_trigger) {
-			intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
-					   hotplug_trigger, hpd_status_i915,
+			intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
+					   hotplug_trigger, hotplug_trigger,
+					   hpd_status_i915,
 					   i9xx_port_hotplug_long_detect);
 			intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
 		}
@@ -2191,7 +2194,7 @@ static void ibx_hpd_irq_handler(struct drm_i915_private *dev_priv,
 	if (!hotplug_trigger)
 		return;
 
-	intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
+	intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, hotplug_trigger,
 			   dig_hotplug_reg, hpd,
 			   pch_port_hotplug_long_detect);
 
@@ -2333,8 +2336,8 @@ static void spt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
 		dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
 		I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
 
-		intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
-				   dig_hotplug_reg, hpd_spt,
+		intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
+				   hotplug_trigger, dig_hotplug_reg, hpd_spt,
 				   spt_port_hotplug_long_detect);
 	}
 
@@ -2344,8 +2347,8 @@ static void spt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
 		dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG2);
 		I915_WRITE(PCH_PORT_HOTPLUG2, dig_hotplug_reg);
 
-		intel_get_hpd_pins(&pin_mask, &long_mask, hotplug2_trigger,
-				   dig_hotplug_reg, hpd_spt,
+		intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
+				   hotplug2_trigger, dig_hotplug_reg, hpd_spt,
 				   spt_port_hotplug2_long_detect);
 	}
 
@@ -2365,7 +2368,7 @@ static void ilk_hpd_irq_handler(struct drm_i915_private *dev_priv,
 	dig_hotplug_reg = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
 	I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, dig_hotplug_reg);
 
-	intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
+	intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, hotplug_trigger,
 			   dig_hotplug_reg, hpd,
 			   ilk_port_hotplug_long_detect);
 
@@ -2542,7 +2545,7 @@ static void bxt_hpd_irq_handler(struct drm_i915_private *dev_priv,
 	dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
 	I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
 
-	intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
+	intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, hotplug_trigger,
 			   dig_hotplug_reg, hpd,
 			   bxt_port_hotplug_long_detect);
 

drivers/gpu/drm/i915/intel_dp.c

@@ -5981,8 +5981,10 @@ intel_dp_init_connector_port_info(struct intel_digital_port *intel_dig_port)
 {
 	struct intel_encoder *encoder = &intel_dig_port->base;
 	struct intel_dp *intel_dp = &intel_dig_port->dp;
+	struct intel_encoder *intel_encoder = &intel_dig_port->base;
+	struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
 
-	encoder->hpd_pin = intel_hpd_pin(encoder->port);
+	encoder->hpd_pin = intel_hpd_pin_default(dev_priv, encoder->port);
 
 	switch (encoder->port) {
 	case PORT_A:

drivers/gpu/drm/i915/intel_hdmi.c

@@ -2091,7 +2091,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 
 	if (WARN_ON(port == PORT_A))
 		return;
-	intel_encoder->hpd_pin = intel_hpd_pin(port);
+	intel_encoder->hpd_pin = intel_hpd_pin_default(dev_priv, port);
 
 	if (HAS_DDI(dev_priv))
 		intel_connector->get_hw_state = intel_ddi_connector_get_hw_state;

drivers/gpu/drm/i915/intel_hotplug.c

@@ -78,12 +78,14 @@
 
 /**
  * intel_hpd_port - return port hard associated with certain pin.
+ * @dev_priv: private driver data pointer
  * @pin: the hpd pin to get associated port
  *
  * Return port that is associatade with @pin and PORT_NONE if no port is
  * hard associated with that @pin.
  */
-enum port intel_hpd_pin_to_port(enum hpd_pin pin)
+enum port intel_hpd_pin_to_port(struct drm_i915_private *dev_priv,
+				enum hpd_pin pin)
 {
 	switch (pin) {
 	case HPD_PORT_A:
@@ -95,6 +97,8 @@ enum port intel_hpd_pin_to_port(enum hpd_pin pin)
 	case HPD_PORT_D:
 		return PORT_D;
 	case HPD_PORT_E:
+		if (IS_CNL_WITH_PORT_F(dev_priv))
+			return PORT_F;
 		return PORT_E;
 	default:
 		return PORT_NONE; /* no port for this pin */
@@ -102,13 +106,17 @@ enum port intel_hpd_pin_to_port(enum hpd_pin pin)
 }
 
 /**
- * intel_hpd_pin - return pin hard associated with certain port.
+ * intel_hpd_pin_default - return default pin associated with certain port.
+ * @dev_priv: private driver data pointer
  * @port: the hpd port to get associated pin
  *
+ * It is only valid and used by digital port encoder.
+ *
  * Return pin that is associatade with @port and HDP_NONE if no pin is
  * hard associated with that @port.
  */
-enum hpd_pin intel_hpd_pin(enum port port)
+enum hpd_pin intel_hpd_pin_default(struct drm_i915_private *dev_priv,
+				   enum port port)
 {
 	switch (port) {
 	case PORT_A:
@@ -121,6 +129,9 @@ enum hpd_pin intel_hpd_pin(enum port port)
 		return HPD_PORT_D;
 	case PORT_E:
 		return HPD_PORT_E;
+	case PORT_F:
+		if (IS_CNL_WITH_PORT_F(dev_priv))
+			return HPD_PORT_E;
 	default:
 		MISSING_CASE(port);
 		return HPD_NONE;
@@ -417,7 +428,7 @@ void intel_hpd_irq_handler(struct drm_i915_private *dev_priv,
 		if (!(BIT(i) & pin_mask))
 			continue;
 
-		port = intel_hpd_pin_to_port(i);
+		port = intel_hpd_pin_to_port(dev_priv, i);
 		is_dig_port = port != PORT_NONE &&
 			dev_priv->hotplug.irq_port[port];