[PATCH 41/47] drm/i915: create intel_digital_port and use it

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

The goal is to have one single encoder capable of controlling both DP
and HDMI outputs. This patch just adds the initial infrastructure, no
functional changes.

Previously, both intel_dp and intel_hdmi were intel_encoders. Now,
these 2 structs do not have intel_encoder as members anymore. The new
struct intel_digital_port has intel_encoder as a member, and it also
includes intel_dp and intel_hdmi as members. In other words: see the
changes inside intel_drv.h: it's the most important change, everything
else is only to make it compile and work.

For now, each intel_digital_port is still only able to control one of
HDMI or DP, but not both together.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c  |   23 +++++------
 drivers/gpu/drm/i915/intel_dp.c   |   77 ++++++++++++++++++++++---------------
 drivers/gpu/drm/i915/intel_drv.h  |   33 +++++++++++++---
 drivers/gpu/drm/i915/intel_hdmi.c |   27 +++++++------
 4 files changed, 101 insertions(+), 59 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 74e7615..beea8a6 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -63,13 +63,11 @@ static enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder)
 	struct drm_encoder *encoder = &intel_encoder->base;
 	int type = intel_encoder->type;
 
-	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
-		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-		return intel_dp->port;
-
-	} else if (type == INTEL_OUTPUT_HDMI) {
-		struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
-		return intel_hdmi->ddi_port;
+	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP ||
+	    type == INTEL_OUTPUT_HDMI) {
+		struct intel_digital_port *intel_dig_port =
+			enc_to_dig_port(encoder);
+		return intel_dig_port->port;
 
 	} else if (type == INTEL_OUTPUT_ANALOG) {
 		return PORT_E;
@@ -924,11 +922,13 @@ void intel_ddi_enable_pipe_func(struct drm_crtc *crtc)
 	struct drm_i915_private *dev_priv = crtc->dev->dev_private;
 	enum pipe pipe = intel_crtc->pipe;
 	enum transcoder transcoder = intel_crtc->transcoder;
+	enum port port = intel_ddi_get_encoder_port(intel_encoder);
 	int type = intel_encoder->type;
 	uint32_t temp;
 
 	/* Enable TRANS_DDI_FUNC_CTL for the pipe to work in HDMI mode */
 	temp = TRANS_DDI_FUNC_ENABLE;
+	temp |= TRANS_DDI_SELECT_PORT(port);
 
 	switch (intel_crtc->bpp) {
 	case 18:
@@ -978,18 +978,14 @@ void intel_ddi_enable_pipe_func(struct drm_crtc *crtc)
 		else
 			temp |= TRANS_DDI_MODE_SELECT_DVI;
 
-		temp |= TRANS_DDI_SELECT_PORT(intel_hdmi->ddi_port);
-
 	} else if (type == INTEL_OUTPUT_ANALOG) {
 		temp |= TRANS_DDI_MODE_SELECT_FDI;
-		temp |= TRANS_DDI_SELECT_PORT(PORT_E);
 
 	} else if (type == INTEL_OUTPUT_DISPLAYPORT ||
 		   type == INTEL_OUTPUT_EDP) {
 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 
 		temp |= TRANS_DDI_MODE_SELECT_DP_SST;
-		temp |= TRANS_DDI_SELECT_PORT(intel_dp->port);
 
 		switch (intel_dp->lane_count) {
 		case 1:
@@ -1301,9 +1297,10 @@ void intel_ddi_pll_init(struct drm_device *dev)
 
 void intel_ddi_prepare_link_retrain(struct drm_encoder *encoder)
 {
-	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
+	struct intel_dp *intel_dp = &intel_dig_port->dp;
 	struct drm_i915_private *dev_priv = encoder->dev->dev_private;
-	enum port port = intel_dp->port;
+	enum port port = intel_dig_port->port;
 	bool wait;
 	uint32_t val;
 
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 749ef1c..771a5a6 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -50,7 +50,9 @@
  */
 static bool is_edp(struct intel_dp *intel_dp)
 {
-	return intel_dp->base.type == INTEL_OUTPUT_EDP;
+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+
+	return intel_dig_port->base.type == INTEL_OUTPUT_EDP;
 }
 
 /**
@@ -79,7 +81,9 @@ static bool is_cpu_edp(struct intel_dp *intel_dp)
 
 static struct drm_device *intel_dp_to_dev(struct intel_dp *intel_dp)
 {
-	return intel_dp->base.base.dev;
+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+
+	return intel_dig_port->base.base.dev;
 }
 
 static struct intel_dp *intel_attached_dp(struct drm_connector *connector)
@@ -348,7 +352,8 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
 		uint8_t *recv, int recv_size)
 {
 	uint32_t output_reg = intel_dp->output_reg;
-	struct drm_device *dev = intel_dp_to_dev(intel_dp);
+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+	struct drm_device *dev = intel_dig_port->base.base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	uint32_t ch_ctl = output_reg + 0x10;
 	uint32_t ch_data = ch_ctl + 4;
@@ -359,7 +364,7 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
 	int try, precharge;
 
 	if (IS_HASWELL(dev)) {
-		switch (intel_dp->port) {
+		switch (intel_dig_port->port) {
 		case PORT_A:
 			ch_ctl = DPA_AUX_CH_CTL;
 			ch_data = DPA_AUX_CH_DATA1;
@@ -377,7 +382,8 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
 			ch_data = PCH_DPD_AUX_CH_DATA;
 			break;
 		default:
-			WARN(1, "Invalid port %c\n", port_name(intel_dp->port));
+			WARN(1, "Invalid port %c\n",
+			     port_name(intel_dig_port->port));
 			break;
 		}
 	}
@@ -1224,8 +1230,9 @@ void ironlake_edp_backlight_off(struct intel_dp *intel_dp)
 
 static void ironlake_edp_pll_on(struct intel_dp *intel_dp)
 {
-	struct drm_device *dev = intel_dp_to_dev(intel_dp);
-	struct drm_crtc *crtc = intel_dp->base.base.crtc;
+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+	struct drm_crtc *crtc = intel_dig_port->base.base.crtc;
+	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 dpa_ctl;
 
@@ -1249,8 +1256,9 @@ static void ironlake_edp_pll_on(struct intel_dp *intel_dp)
 
 static void ironlake_edp_pll_off(struct intel_dp *intel_dp)
 {
-	struct drm_device *dev = intel_dp_to_dev(intel_dp);
-	struct drm_crtc *crtc = intel_dp->base.base.crtc;
+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+	struct drm_crtc *crtc = intel_dig_port->base.base.crtc;
+	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 dpa_ctl;
 
@@ -1760,13 +1768,15 @@ intel_dp_set_link_train(struct intel_dp *intel_dp,
 			uint32_t dp_reg_value,
 			uint8_t dp_train_pat)
 {
-	struct drm_device *dev = intel_dp_to_dev(intel_dp);
+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+	struct drm_device *dev = intel_dig_port->base.base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
+	enum port port = intel_dig_port->port;
 	int ret;
 	uint32_t temp;
 
 	if (IS_HASWELL(dev)) {
-		temp = I915_READ(DP_TP_CTL(intel_dp->port));
+		temp = I915_READ(DP_TP_CTL(port));
 
 		if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE)
 			temp |= DP_TP_CTL_SCRAMBLE_DISABLE;
@@ -1777,9 +1787,9 @@ intel_dp_set_link_train(struct intel_dp *intel_dp,
 		switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
 		case DP_TRAINING_PATTERN_DISABLE:
 			temp |= DP_TP_CTL_LINK_TRAIN_IDLE;
-			I915_WRITE(DP_TP_CTL(intel_dp->port), temp);
+			I915_WRITE(DP_TP_CTL(port), temp);
 
-			if (wait_for((I915_READ(DP_TP_STATUS(intel_dp->port)) &
+			if (wait_for((I915_READ(DP_TP_STATUS(port)) &
 				      DP_TP_STATUS_IDLE_DONE) == 0, 1))
 				DRM_ERROR("Timed out waiting for DP idle patterns\n");
 
@@ -1797,7 +1807,7 @@ intel_dp_set_link_train(struct intel_dp *intel_dp,
 			temp |= DP_TP_CTL_LINK_TRAIN_PAT3;
 			break;
 		}
-		I915_WRITE(DP_TP_CTL(intel_dp->port), temp);
+		I915_WRITE(DP_TP_CTL(port), temp);
 
 	} else if (HAS_PCH_CPT(dev) &&
 		   (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) {
@@ -1863,7 +1873,7 @@ intel_dp_set_link_train(struct intel_dp *intel_dp,
 void
 intel_dp_start_link_train(struct intel_dp *intel_dp)
 {
-	struct drm_encoder *encoder = &intel_dp->base.base;
+	struct drm_encoder *encoder = &dp_to_dig_port(intel_dp)->base.base;
 	struct drm_device *dev = encoder->dev;
 	int i;
 	uint8_t voltage;
@@ -2041,7 +2051,8 @@ intel_dp_complete_link_train(struct intel_dp *intel_dp)
 static void
 intel_dp_link_down(struct intel_dp *intel_dp)
 {
-	struct drm_device *dev = intel_dp_to_dev(intel_dp);
+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+	struct drm_device *dev = intel_dig_port->base.base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	uint32_t DP = intel_dp->DP;
 
@@ -2081,7 +2092,7 @@ intel_dp_link_down(struct intel_dp *intel_dp)
 
 	if (HAS_PCH_IBX(dev) &&
 	    I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) {
-		struct drm_crtc *crtc = intel_dp->base.base.crtc;
+		struct drm_crtc *crtc = intel_dig_port->base.base.crtc;
 
 		/* Hardware workaround: leaving our transcoder select
 		 * set to transcoder B while it's off will prevent the
@@ -2197,13 +2208,14 @@ intel_dp_handle_test_request(struct intel_dp *intel_dp)
 static void
 intel_dp_check_link_status(struct intel_dp *intel_dp)
 {
+	struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base;
 	u8 sink_irq_vector;
 	u8 link_status[DP_LINK_STATUS_SIZE];
 
-	if (!intel_dp->base.connectors_active)
+	if (!intel_encoder->connectors_active)
 		return;
 
-	if (WARN_ON(!intel_dp->base.base.crtc))
+	if (WARN_ON(!intel_encoder->base.crtc))
 		return;
 
 	/* Try to read receiver status if the link appears to be up */
@@ -2234,7 +2246,7 @@ intel_dp_check_link_status(struct intel_dp *intel_dp)
 
 	if (!intel_channel_eq_ok(intel_dp, link_status)) {
 		DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n",
-			      drm_get_encoder_name(&intel_dp->base.base));
+			      drm_get_encoder_name(&intel_encoder->base));
 		intel_dp_start_link_train(intel_dp);
 		intel_dp_complete_link_train(intel_dp);
 	}
@@ -2481,7 +2493,8 @@ intel_dp_set_property(struct drm_connector *connector,
 		      uint64_t val)
 {
 	struct drm_i915_private *dev_priv = connector->dev->dev_private;
-	struct intel_dp *intel_dp = intel_attached_dp(connector);
+	struct intel_encoder *intel_encoder = intel_attached_encoder(connector);
+	struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
 	int ret;
 
 	ret = drm_connector_property_set_value(connector, property, val);
@@ -2520,8 +2533,8 @@ intel_dp_set_property(struct drm_connector *connector,
 	return -EINVAL;
 
 done:
-	if (intel_dp->base.base.crtc) {
-		struct drm_crtc *crtc = intel_dp->base.base.crtc;
+	if (intel_encoder->base.crtc) {
+		struct drm_crtc *crtc = intel_encoder->base.crtc;
 		intel_set_mode(crtc, &crtc->mode,
 			       crtc->x, crtc->y, crtc->fb);
 	}
@@ -2544,7 +2557,8 @@ intel_dp_destroy(struct drm_connector *connector)
 
 static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
 {
-	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
+	struct intel_dp *intel_dp = &intel_dig_port->dp;
 
 	i2c_del_adapter(&intel_dp->adapter);
 	drm_encoder_cleanup(encoder);
@@ -2553,7 +2567,7 @@ static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
 		cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
 		ironlake_panel_vdd_off_sync(intel_dp);
 	}
-	kfree(intel_dp);
+	kfree(intel_dig_port);
 }
 
 static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = {
@@ -2648,24 +2662,27 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
 	struct intel_dp *intel_dp;
 	struct intel_encoder *intel_encoder;
 	struct intel_connector *intel_connector;
+	struct intel_digital_port *intel_dig_port;
 	const char *name = NULL;
 	int type;
 
-	intel_dp = kzalloc(sizeof(struct intel_dp), GFP_KERNEL);
-	if (!intel_dp)
+	intel_dig_port = kzalloc(sizeof(struct intel_digital_port), GFP_KERNEL);
+	if (!intel_dig_port)
 		return;
 
+	intel_dig_port->port = port;
+
+	intel_dp = &intel_dig_port->dp;
 	intel_dp->output_reg = output_reg;
-	intel_dp->port = port;
 	/* Preserve the current hw state. */
 	intel_dp->DP = I915_READ(intel_dp->output_reg);
 
 	intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 	if (!intel_connector) {
-		kfree(intel_dp);
+		kfree(intel_dig_port);
 		return;
 	}
-	intel_encoder = &intel_dp->base;
+	intel_encoder = &intel_dig_port->base;
 
 	if (HAS_PCH_SPLIT(dev) && output_reg == PCH_DP_D)
 		if (intel_dpd_is_edp(dev))
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 73b4659..6803b99 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -319,10 +319,8 @@ struct dip_infoframe {
 } __attribute__((packed));
 
 struct intel_hdmi {
-	struct intel_encoder base;
 	u32 sdvox_reg;
 	int ddc_bus;
-	int ddi_port;
 	uint32_t color_range;
 	bool has_hdmi_sink;
 	bool has_audio;
@@ -338,13 +336,11 @@ struct intel_hdmi {
 #define DP_LINK_CONFIGURATION_SIZE	9
 
 struct intel_dp {
-	struct intel_encoder base;
 	uint32_t output_reg;
 	uint32_t DP;
 	uint8_t  link_configuration[DP_LINK_CONFIGURATION_SIZE];
 	bool has_audio;
 	enum hdmi_force_audio force_audio;
-	enum port port;
 	uint32_t color_range;
 	uint8_t link_bw;
 	uint8_t lane_count;
@@ -366,6 +362,13 @@ struct intel_dp {
 	int edid_mode_count;
 };
 
+struct intel_digital_port {
+	struct intel_encoder base;
+	enum port port;
+	struct intel_dp dp;
+	struct intel_hdmi hdmi;
+};
+
 static inline struct drm_crtc *
 intel_get_crtc_for_pipe(struct drm_device *dev, int pipe)
 {
@@ -487,7 +490,27 @@ static inline struct intel_encoder *intel_attached_encoder(struct drm_connector
 
 static inline struct intel_dp *enc_to_intel_dp(struct drm_encoder *encoder)
 {
-	return container_of(encoder, struct intel_dp, base.base);
+	struct intel_digital_port *intel_dig_port =
+		container_of(encoder, struct intel_digital_port, base.base);
+	return &intel_dig_port->dp;
+}
+
+static inline struct intel_digital_port *
+enc_to_dig_port(struct drm_encoder *encoder)
+{
+	return container_of(encoder, struct intel_digital_port, base.base);
+}
+
+static inline struct intel_digital_port *
+dp_to_dig_port(struct intel_dp *intel_dp)
+{
+	return container_of(intel_dp, struct intel_digital_port, dp);
+}
+
+static inline struct intel_digital_port *
+hdmi_to_dig_port(struct intel_hdmi *intel_hdmi)
+{
+	return container_of(intel_hdmi, struct intel_digital_port, hdmi);
 }
 
 extern void intel_connector_attach_encoder(struct intel_connector *connector,
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 6c82bf7..6045503 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -39,7 +39,7 @@
 
 static struct drm_device *intel_hdmi_to_dev(struct intel_hdmi *intel_hdmi)
 {
-	return intel_hdmi->base.base.dev;
+	return hdmi_to_dig_port(intel_hdmi)->base.base.dev;
 }
 
 static void
@@ -57,13 +57,14 @@ assert_hdmi_port_disabled(struct intel_hdmi *intel_hdmi)
 
 struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder)
 {
-	return container_of(encoder, struct intel_hdmi, base.base);
+	struct intel_digital_port *intel_dig_port =
+		container_of(encoder, struct intel_digital_port, base.base);
+	return &intel_dig_port->hdmi;
 }
 
 static struct intel_hdmi *intel_attached_hdmi(struct drm_connector *connector)
 {
-	return container_of(intel_attached_encoder(connector),
-			    struct intel_hdmi, base);
+	return enc_to_intel_hdmi(&intel_attached_encoder(connector)->base);
 }
 
 void intel_dip_infoframe_csum(struct dip_infoframe *frame)
@@ -850,6 +851,8 @@ intel_hdmi_set_property(struct drm_connector *connector,
 			uint64_t val)
 {
 	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
+	struct intel_digital_port *intel_dig_port =
+		hdmi_to_dig_port(intel_hdmi);
 	struct drm_i915_private *dev_priv = connector->dev->dev_private;
 	int ret;
 
@@ -889,8 +892,8 @@ intel_hdmi_set_property(struct drm_connector *connector,
 	return -EINVAL;
 
 done:
-	if (intel_hdmi->base.base.crtc) {
-		struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
+	if (intel_dig_port->base.base.crtc) {
+		struct drm_crtc *crtc = intel_dig_port->base.base.crtc;
 		intel_set_mode(crtc, &crtc->mode,
 			       crtc->x, crtc->y, crtc->fb);
 	}
@@ -948,19 +951,21 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg, enum port port)
 	struct drm_connector *connector;
 	struct intel_encoder *intel_encoder;
 	struct intel_connector *intel_connector;
+	struct intel_digital_port *intel_dig_port;
 	struct intel_hdmi *intel_hdmi;
 
-	intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
-	if (!intel_hdmi)
+	intel_dig_port = kzalloc(sizeof(struct intel_digital_port), GFP_KERNEL);
+	if (!intel_dig_port)
 		return;
 
 	intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 	if (!intel_connector) {
-		kfree(intel_hdmi);
+		kfree(intel_dig_port);
 		return;
 	}
 
-	intel_encoder = &intel_hdmi->base;
+	intel_hdmi = &intel_dig_port->hdmi;
+	intel_encoder = &intel_dig_port->base;
 	drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
 			 DRM_MODE_ENCODER_TMDS);
 
@@ -978,7 +983,7 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg, enum port port)
 
 	intel_encoder->cloneable = false;
 
-	intel_hdmi->ddi_port = port;
+	intel_dig_port->port = port;
 	switch (port) {
 	case PORT_B:
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
-- 
1.7.10.4