drm/i915: Nuke intel_digital_port->port

Remove intel_digital_port->port and replace its users with
intel_encoder->port. intel_encoder->port is a superset of
intel_digital_port->port, and it works correctly even for
MST encoders.

v2: Eliminate a few dp_to_dig_port()->base.port cases too (DK)

Performed with cocci:
@@
@@
struct intel_digital_port {
       ...
-       enum port port;
       ...
}

@@
struct intel_digital_port *D;
expression E;
@@
- D->port = E;

@@
struct intel_digital_port *D;
@@
- D->port
+ D->base.port

@
expression E;
@@
(
- dp_to_dig_port(E)->port
+ dp_to_dig_port(E)->base.port
|
- enc_to_dig_port(E)->port
+ to_intel_encoder(E)->port
)

@@
expression E;
@@
- to_intel_encoder(&E->base)
+ E

@@
struct intel_digital_port *D;
identifier I, M;
@@
  I = &D->base
<...
(
- D->base.M
+ I->M
|
- &D->base
+ I
)
...>

@@
identifier D;
expression E;
identifier M;
@@
 D = enc_to_dig_port(&E->base)
<...
(
- D->base.M
+ E->M
|
- &D->base
+ E
)
...>

@@
identifier D, DP;
expression E;
identifier M;
@@
 DP = enc_to_intel_dp(&E->base)
<...
(
- dp_to_dig_port(DP)->base.M
+ E->M
|
- &dp_to_dig_port(DP)->base
+ E
)
...>

@@
expression E;
identifier M;
@@
(
- enc_to_dig_port(&E->base)->base.M
+ E->M
|
- enc_to_dig_port(&E->base)->base
+ E
|
- enc_to_mst(&E->base)->primary->base.port
+ E->port
)

@@
expression E;
identifier D;
@@
- struct intel_digital_port *D = E;
... when != D

Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171109152434.32074-1-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/i915_debugfs.c

@@ -3603,7 +3603,7 @@ static int i915_dp_mst_info(struct seq_file *m, void *unused)
 			continue;
 
 		seq_printf(m, "MST Source Port %c\n",
-			   port_name(intel_dig_port->port));
+			   port_name(intel_dig_port->base.port));
 		drm_dp_mst_dump_topology(m, &intel_dig_port->dp.mst_mgr);
 	}
 	drm_connector_list_iter_end(&conn_iter);

drivers/gpu/drm/i915/intel_ddi.c

@@ -1801,8 +1801,8 @@ static void skl_ddi_set_iboost(struct intel_encoder *encoder,
 			       int level, enum intel_output_type type)
 {
 	struct intel_digital_port *intel_dig_port = enc_to_dig_port(&encoder->base);
-	struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
-	enum port port = intel_dig_port->port;
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	enum port port = encoder->port;
 	uint8_t iboost;
 
 	if (type == INTEL_OUTPUT_HDMI)
@@ -2470,7 +2470,7 @@ void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
 	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 	struct drm_i915_private *dev_priv =
 		to_i915(intel_dig_port->base.base.dev);
-	enum port port = intel_dig_port->port;
+	enum port port = intel_dig_port->base.port;
 	uint32_t val;
 	bool wait = false;
 
@@ -2698,7 +2698,7 @@ static struct intel_connector *
 intel_ddi_init_dp_connector(struct intel_digital_port *intel_dig_port)
 {
 	struct intel_connector *connector;
-	enum port port = intel_dig_port->port;
+	enum port port = intel_dig_port->base.port;
 
 	connector = intel_connector_alloc();
 	if (!connector)
@@ -2717,7 +2717,7 @@ static struct intel_connector *
 intel_ddi_init_hdmi_connector(struct intel_digital_port *intel_dig_port)
 {
 	struct intel_connector *connector;
-	enum port port = intel_dig_port->port;
+	enum port port = intel_dig_port->base.port;
 
 	connector = intel_connector_alloc();
 	if (!connector)
@@ -2733,7 +2733,7 @@ static bool intel_ddi_a_force_4_lanes(struct intel_digital_port *dport)
 {
 	struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
 
-	if (dport->port != PORT_A)
+	if (dport->base.port != PORT_A)
 		return false;
 
 	if (dport->saved_port_bits & DDI_A_4_LANES)
@@ -2836,7 +2836,6 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 	intel_encoder->suspend = intel_dp_encoder_suspend;
 	intel_encoder->get_power_domains = intel_ddi_get_power_domains;
 
-	intel_dig_port->port = port;
 	intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
 					  (DDI_BUF_PORT_REVERSAL |
 					   DDI_A_4_LANES);

drivers/gpu/drm/i915/intel_display.c

@@ -1701,7 +1701,7 @@ void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
 	u32 port_mask;
 	i915_reg_t dpll_reg;
 
-	switch (dport->port) {
+	switch (dport->base.port) {
 	case PORT_B:
 		port_mask = DPLL_PORTB_READY_MASK;
 		dpll_reg = DPLL(0);
@@ -1723,7 +1723,8 @@ void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
 				    dpll_reg, port_mask, expected_mask,
 				    1000))
 		WARN(1, "timed out waiting for port %c ready: got 0x%x, expected 0x%x\n",
-		     port_name(dport->port), I915_READ(dpll_reg) & port_mask, expected_mask);
+		     port_name(dport->base.port),
+		     I915_READ(dpll_reg) & port_mask, expected_mask);
 }
 
 static void ironlake_enable_pch_transcoder(struct drm_i915_private *dev_priv,
@@ -4481,7 +4482,7 @@ intel_trans_dp_port_sel(struct intel_crtc *crtc)
 	for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
 		if (encoder->type == INTEL_OUTPUT_DP ||
 		    encoder->type == INTEL_OUTPUT_EDP)
-			return enc_to_dig_port(&encoder->base)->port;
+			return encoder->port;
 	}
 
 	return -1;
@@ -7632,7 +7633,7 @@ static void ironlake_init_pch_refclk(struct drm_i915_private *dev_priv)
 			break;
 		case INTEL_OUTPUT_EDP:
 			has_panel = true;
-			if (enc_to_dig_port(&encoder->base)->port == PORT_A)
+			if (encoder->port == PORT_A)
 				has_cpu_edp = true;
 			break;
 		default:
@@ -10755,7 +10756,7 @@ static bool check_digital_port_conflicts(struct drm_atomic_state *state)
 		case INTEL_OUTPUT_DP:
 		case INTEL_OUTPUT_HDMI:
 		case INTEL_OUTPUT_EDP:
-			port_mask = 1 << enc_to_dig_port(&encoder->base)->port;
+			port_mask = 1 << encoder->port;
 
 			/* the same port mustn't appear more than once */
 			if (used_ports & port_mask)
@@ -10765,7 +10766,7 @@ static bool check_digital_port_conflicts(struct drm_atomic_state *state)
 			break;
 		case INTEL_OUTPUT_DP_MST:
 			used_mst_ports |=
-				1 << enc_to_mst(&encoder->base)->primary->port;
+				1 << encoder->port;
 			break;
 		default:
 			break;

drivers/gpu/drm/i915/intel_dp_mst.c

@@ -209,7 +209,7 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 	struct intel_digital_port *intel_dig_port = intel_mst->primary;
 	struct intel_dp *intel_dp = &intel_dig_port->dp;
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	enum port port = intel_dig_port->port;
+	enum port port = intel_dig_port->base.port;
 	struct intel_connector *connector =
 		to_intel_connector(conn_state->connector);
 	int ret;
@@ -253,7 +253,7 @@ static void intel_mst_enable_dp(struct intel_encoder *encoder,
 	struct intel_digital_port *intel_dig_port = intel_mst->primary;
 	struct intel_dp *intel_dp = &intel_dig_port->dp;
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	enum port port = intel_dig_port->port;
+	enum port port = intel_dig_port->base.port;
 	int ret;
 
 	DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
@@ -552,7 +552,7 @@ intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum
 
 	intel_encoder->type = INTEL_OUTPUT_DP_MST;
 	intel_encoder->power_domain = intel_dig_port->base.power_domain;
-	intel_encoder->port = intel_dig_port->port;
+	intel_encoder->port = intel_dig_port->base.port;
 	intel_encoder->crtc_mask = 0x7;
 	intel_encoder->cloneable = 0;
 

drivers/gpu/drm/i915/intel_dpio_phy.c

@@ -586,9 +586,8 @@ bxt_ddi_phy_calc_lane_lat_optim_mask(uint8_t lane_count)
 void bxt_ddi_phy_set_lane_optim_mask(struct intel_encoder *encoder,
 				     uint8_t lane_lat_optim_mask)
 {
-	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
-	struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
-	enum port port = dport->port;
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	enum port port = encoder->port;
 	enum dpio_phy phy;
 	enum dpio_channel ch;
 	int lane;
@@ -613,9 +612,8 @@ void bxt_ddi_phy_set_lane_optim_mask(struct intel_encoder *encoder,
 uint8_t
 bxt_ddi_phy_get_lane_lat_optim_mask(struct intel_encoder *encoder)
 {
-	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
-	struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
-	enum port port = dport->port;
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	enum port port = encoder->port;
 	enum dpio_phy phy;
 	enum dpio_channel ch;
 	int lane;
@@ -641,7 +639,7 @@ void chv_set_phy_signal_level(struct intel_encoder *encoder,
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
-	struct intel_crtc *intel_crtc = to_intel_crtc(dport->base.base.crtc);
+	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 	enum dpio_channel ch = vlv_dport_to_channel(dport);
 	enum pipe pipe = intel_crtc->pipe;
 	u32 val;

drivers/gpu/drm/i915/intel_drv.h

@@ -1056,7 +1056,6 @@ struct intel_lspcon {
 
 struct intel_digital_port {
 	struct intel_encoder base;
-	enum port port;
 	u32 saved_port_bits;
 	struct intel_dp dp;
 	struct intel_hdmi hdmi;
@@ -1088,7 +1087,7 @@ struct intel_dp_mst_encoder {
 static inline enum dpio_channel
 vlv_dport_to_channel(struct intel_digital_port *dport)
 {
-	switch (dport->port) {
+	switch (dport->base.port) {
 	case PORT_B:
 	case PORT_D:
 		return DPIO_CH0;
@@ -1102,7 +1101,7 @@ vlv_dport_to_channel(struct intel_digital_port *dport)
 static inline enum dpio_phy
 vlv_dport_to_phy(struct intel_digital_port *dport)
 {
-	switch (dport->port) {
+	switch (dport->base.port) {
 	case PORT_B:
 	case PORT_C:
 		return DPIO_PHY0;

drivers/gpu/drm/i915/intel_hdmi.c

@@ -186,7 +186,7 @@ static bool g4x_infoframe_enabled(struct drm_encoder *encoder,
 	if ((val & VIDEO_DIP_ENABLE) == 0)
 		return false;
 
-	if ((val & VIDEO_DIP_PORT_MASK) != VIDEO_DIP_PORT(intel_dig_port->port))
+	if ((val & VIDEO_DIP_PORT_MASK) != VIDEO_DIP_PORT(intel_dig_port->base.port))
 		return false;
 
 	return val & (VIDEO_DIP_ENABLE_AVI |
@@ -245,7 +245,7 @@ static bool ibx_infoframe_enabled(struct drm_encoder *encoder,
 	if ((val & VIDEO_DIP_ENABLE) == 0)
 		return false;
 
-	if ((val & VIDEO_DIP_PORT_MASK) != VIDEO_DIP_PORT(intel_dig_port->port))
+	if ((val & VIDEO_DIP_PORT_MASK) != VIDEO_DIP_PORT(intel_dig_port->base.port))
 		return false;
 
 	return val & (VIDEO_DIP_ENABLE_AVI |
@@ -362,7 +362,7 @@ static bool vlv_infoframe_enabled(struct drm_encoder *encoder,
 	if ((val & VIDEO_DIP_ENABLE) == 0)
 		return false;
 
-	if ((val & VIDEO_DIP_PORT_MASK) != VIDEO_DIP_PORT(intel_dig_port->port))
+	if ((val & VIDEO_DIP_PORT_MASK) != VIDEO_DIP_PORT(intel_dig_port->base.port))
 		return false;
 
 	return val & (VIDEO_DIP_ENABLE_AVI |
@@ -535,7 +535,7 @@ static void g4x_set_infoframes(struct drm_encoder *encoder,
 	struct intel_hdmi *intel_hdmi = &intel_dig_port->hdmi;
 	i915_reg_t reg = VIDEO_DIP_CTL;
 	u32 val = I915_READ(reg);
-	u32 port = VIDEO_DIP_PORT(intel_dig_port->port);
+	u32 port = VIDEO_DIP_PORT(intel_dig_port->base.port);
 
 	assert_hdmi_port_disabled(intel_hdmi);
 
@@ -686,7 +686,7 @@ static void ibx_set_infoframes(struct drm_encoder *encoder,
 	struct intel_hdmi *intel_hdmi = &intel_dig_port->hdmi;
 	i915_reg_t reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
 	u32 val = I915_READ(reg);
-	u32 port = VIDEO_DIP_PORT(intel_dig_port->port);
+	u32 port = VIDEO_DIP_PORT(intel_dig_port->base.port);
 
 	assert_hdmi_port_disabled(intel_hdmi);
 
@@ -782,7 +782,7 @@ static void vlv_set_infoframes(struct drm_encoder *encoder,
 	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 	i915_reg_t reg = VLV_TVIDEO_DIP_CTL(intel_crtc->pipe);
 	u32 val = I915_READ(reg);
-	u32 port = VIDEO_DIP_PORT(intel_dig_port->port);
+	u32 port = VIDEO_DIP_PORT(intel_dig_port->base.port);
 
 	assert_hdmi_port_disabled(intel_hdmi);
 
@@ -1545,7 +1545,7 @@ intel_hdmi_dp_dual_mode_detect(struct drm_connector *connector, bool has_edid)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->dev);
 	struct intel_hdmi *hdmi = intel_attached_hdmi(connector);
-	enum port port = hdmi_to_dig_port(hdmi)->port;
+	enum port port = hdmi_to_dig_port(hdmi)->base.port;
 	struct i2c_adapter *adapter =
 		intel_gmbus_get_adapter(dev_priv, hdmi->ddc_bus);
 	enum drm_dp_dual_mode_type type = drm_dp_dual_mode_detect(adapter);
@@ -2015,7 +2015,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 	struct intel_encoder *intel_encoder = &intel_dig_port->base;
 	struct drm_device *dev = intel_encoder->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
-	enum port port = intel_dig_port->port;
+	enum port port = intel_encoder->port;
 
 	DRM_DEBUG_KMS("Adding HDMI connector on port %c\n",
 		      port_name(port));
@@ -2135,7 +2135,6 @@ void intel_hdmi_init(struct drm_i915_private *dev_priv,
 	if (IS_G4X(dev_priv))
 		intel_encoder->cloneable |= 1 << INTEL_OUTPUT_HDMI;
 
-	intel_dig_port->port = port;
 	intel_dig_port->hdmi.hdmi_reg = hdmi_reg;
 	intel_dig_port->dp.output_reg = INVALID_MMIO_REG;
 	intel_dig_port->max_lanes = 4;

drivers/gpu/drm/i915/intel_pipe_crc.c

@@ -269,7 +269,7 @@ static int i9xx_pipe_crc_auto_source(struct drm_i915_private *dev_priv,
 		case INTEL_OUTPUT_DP:
 		case INTEL_OUTPUT_EDP:
 			dig_port = enc_to_dig_port(&encoder->base);
-			switch (dig_port->port) {
+			switch (dig_port->base.port) {
 			case PORT_B:
 				*source = INTEL_PIPE_CRC_SOURCE_DP_B;
 				break;
@@ -281,7 +281,7 @@ static int i9xx_pipe_crc_auto_source(struct drm_i915_private *dev_priv,
 				break;
 			default:
 				WARN(1, "nonexisting DP port %c\n",
-				     port_name(dig_port->port));
+				     port_name(dig_port->base.port));
 				break;
 			}
 			break;

drivers/gpu/drm/i915/intel_psr.c

@@ -163,7 +163,7 @@ static void hsw_psr_enable_sink(struct intel_dp *intel_dp)
 		[3] = 1 - 1,
 		[4] = DP_SET_POWER_D0,
 	};
-	enum port port = dig_port->port;
+	enum port port = dig_port->base.port;
 	u32 aux_ctl;
 	int i;
 
@@ -376,7 +376,7 @@ void intel_psr_compute_config(struct intel_dp *intel_dp,
 	 * ones. Since by Display design transcoder EDP is tied to port A
 	 * we can safely escape based on the port A.
 	 */
-	if (HAS_DDI(dev_priv) && dig_port->port != PORT_A) {
+	if (HAS_DDI(dev_priv) && dig_port->base.port != PORT_A) {
 		DRM_DEBUG_KMS("PSR condition failed: Port not supported\n");
 		return;
 	}