drm/i915: Store port enum in intel_encoder

Storing the port enum in intel_encoder makes it convenient to know the
port attached to an encoder. Moving the port information up from
intel_digital_port to intel_encoder avoids unecessary intel_digital_port
access and handles MST encoders cleanly without requiring conditional
checks for them (thanks danvet).

v2:
Renamed the port enum member from 'attached_port' to 'port' (danvet)
Fixed missing initialization of port in intel_sdvo.c (danvet)

v3:
Fixed missing initialization of port in intel_crt.c (Ville)

v4:
Storing port for DVO encoders too.

Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Lyude <cpaul@redhat.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1474334681-22690-3-git-send-email-dhinakaran.pandiyan@intel.com

drivers/gpu/drm/i915/i915_drv.h

@@ -185,6 +185,7 @@ enum plane {
 #define sprite_name(p, s) ((p) * INTEL_INFO(dev)->num_sprites[(p)] + (s) + 'A')
 
 enum port {
+	PORT_NONE = -1,
 	PORT_A = 0,
 	PORT_B,
 	PORT_C,

drivers/gpu/drm/i915/intel_crt.c

@@ -917,10 +917,12 @@ void intel_crt_init(struct drm_device *dev)
 	if (I915_HAS_HOTPLUG(dev))
 		crt->base.hpd_pin = HPD_CRT;
 	if (HAS_DDI(dev)) {
+		crt->base.port = PORT_E;
 		crt->base.get_config = hsw_crt_get_config;
 		crt->base.get_hw_state = intel_ddi_get_hw_state;
 		crt->base.post_disable = hsw_post_disable_crt;
 	} else {
+		crt->base.port = PORT_NONE;
 		crt->base.get_config = intel_crt_get_config;
 		crt->base.get_hw_state = intel_crt_get_hw_state;
 	}

drivers/gpu/drm/i915/intel_ddi.c

@@ -2520,6 +2520,7 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
 	intel_dig_port->max_lanes = max_lanes;
 
 	intel_encoder->type = INTEL_OUTPUT_UNKNOWN;
+	intel_encoder->port = port;
 	intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
 	intel_encoder->cloneable = 0;
 

drivers/gpu/drm/i915/intel_dp.c

@@ -5832,6 +5832,7 @@ bool intel_dp_init(struct drm_device *dev,
 		intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
 	}
 	intel_encoder->cloneable = 0;
+	intel_encoder->port = port;
 
 	intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
 	dev_priv->hotplug.irq_port[port] = intel_dig_port;

drivers/gpu/drm/i915/intel_dp_mst.c

@@ -523,6 +523,7 @@ intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum
 			 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 
 	intel_encoder->type = INTEL_OUTPUT_DP_MST;
+	intel_encoder->port = intel_dig_port->port;
 	intel_encoder->crtc_mask = 0x7;
 	intel_encoder->cloneable = 0;
 

drivers/gpu/drm/i915/intel_drv.h

@@ -206,6 +206,7 @@ struct intel_encoder {
 	struct drm_encoder base;
 
 	enum intel_output_type type;
+	enum port port;
 	unsigned int cloneable;
 	void (*hot_plug)(struct intel_encoder *);
 	bool (*compute_config)(struct intel_encoder *,

drivers/gpu/drm/i915/intel_dsi.c

@@ -1488,6 +1488,7 @@ void intel_dsi_init(struct drm_device *dev)
 
 	intel_connector->get_hw_state = intel_connector_get_hw_state;
 
+	intel_encoder->port = port;
 	/*
 	 * On BYT/CHV, pipe A maps to MIPI DSI port A, pipe B maps to MIPI DSI
 	 * port C. BXT isn't limited like this.

drivers/gpu/drm/i915/intel_dvo.c

@@ -516,7 +516,9 @@ void intel_dvo_init(struct drm_device *dev)
 				 "DVO %c", port_name(port));
 
 		intel_encoder->type = INTEL_OUTPUT_DVO;
+		intel_encoder->port = port;
 		intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
+
 		switch (dvo->type) {
 		case INTEL_DVO_CHIP_TMDS:
 			intel_encoder->cloneable = (1 << INTEL_OUTPUT_ANALOG) |

drivers/gpu/drm/i915/intel_hdmi.c

@@ -1972,6 +1972,7 @@ void intel_hdmi_init(struct drm_device *dev,
 	}
 
 	intel_encoder->type = INTEL_OUTPUT_HDMI;
+	intel_encoder->port = port;
 	if (IS_CHERRYVIEW(dev)) {
 		if (port == PORT_D)
 			intel_encoder->crtc_mask = 1 << 2;

drivers/gpu/drm/i915/intel_lvds.c

@@ -1064,8 +1064,9 @@ void intel_lvds_init(struct drm_device *dev)
 	intel_connector->get_hw_state = intel_connector_get_hw_state;
 
 	intel_connector_attach_encoder(intel_connector, intel_encoder);
-	intel_encoder->type = INTEL_OUTPUT_LVDS;
 
+	intel_encoder->type = INTEL_OUTPUT_LVDS;
+	intel_encoder->port = PORT_NONE;
 	intel_encoder->cloneable = 0;
 	if (HAS_PCH_SPLIT(dev))
 		intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);

drivers/gpu/drm/i915/intel_sdvo.c

@@ -2981,6 +2981,7 @@ bool intel_sdvo_init(struct drm_device *dev,
 	/* encoder type will be decided later */
 	intel_encoder = &intel_sdvo->base;
 	intel_encoder->type = INTEL_OUTPUT_SDVO;
+	intel_encoder->port = port;
 	drm_encoder_init(dev, &intel_encoder->base, &intel_sdvo_enc_funcs, 0,
 			 "SDVO %c", port_name(port));
 

drivers/gpu/drm/i915/intel_tv.c

@@ -1610,7 +1610,9 @@ intel_tv_init(struct drm_device *dev)
 	intel_connector->get_hw_state = intel_connector_get_hw_state;
 
 	intel_connector_attach_encoder(intel_connector, intel_encoder);
+
 	intel_encoder->type = INTEL_OUTPUT_TVOUT;
+	intel_encoder->port = PORT_NONE;
 	intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 	intel_encoder->cloneable = 0;
 	intel_encoder->base.possible_crtcs = ((1 << 0) | (1 << 1));