drm/i915: Move aux_ch to intel_digital_port

From ICL onwards all DDI/TypeC ports - even working in HDMI mode - need
to know their corresponding AUX CH, so move the field to a common
struct.

No functional change.

v3:
- Add code comment about which ports aux_ch is used for. (Jose)

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181101140427.31026-3-imre.deak@intel.com

drivers/gpu/drm/i915/intel_ddi.c

@@ -2084,6 +2084,8 @@ bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
 static inline enum intel_display_power_domain
 intel_ddi_main_link_aux_domain(struct intel_dp *intel_dp)
 {
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+
 	/* CNL+ HW requires corresponding AUX IOs to be powered up for PSR with
 	 * DC states enabled at the same time, while for driver initiated AUX
 	 * transfers we need the same AUX IOs to be powered but with DC states
@@ -2096,7 +2098,7 @@ intel_ddi_main_link_aux_domain(struct intel_dp *intel_dp)
 	 * Note that PSR is enabled only on Port A even though this function
 	 * returns the correct domain for other ports too.
 	 */
-	return intel_dp->aux_ch == AUX_CH_A ? POWER_DOMAIN_AUX_IO_A :
+	return dig_port->aux_ch == AUX_CH_A ? POWER_DOMAIN_AUX_IO_A :
 					      intel_dp->aux_power_domain;
 }
 

drivers/gpu/drm/i915/intel_dp.c

@@ -1204,6 +1204,7 @@ static uint32_t g4x_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
 static uint32_t ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
 
 	if (index)
 		return 0;
@@ -1213,7 +1214,7 @@ static uint32_t ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
 	 * like to run at 2MHz.  So, take the cdclk or PCH rawclk value and
 	 * divide by 2000 and use that
 	 */
-	if (intel_dp->aux_ch == AUX_CH_A)
+	if (dig_port->aux_ch == AUX_CH_A)
 		return DIV_ROUND_CLOSEST(dev_priv->cdclk.hw.cdclk, 2000);
 	else
 		return DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 2000);
@@ -1222,8 +1223,9 @@ static uint32_t ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
 static uint32_t hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
 
-	if (intel_dp->aux_ch != AUX_CH_A && HAS_PCH_LPT_H(dev_priv)) {
+	if (dig_port->aux_ch != AUX_CH_A && HAS_PCH_LPT_H(dev_priv)) {
 		/* Workaround for non-ULT HSW */
 		switch (index) {
 		case 0: return 63;
@@ -1554,7 +1556,9 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 static enum intel_display_power_domain
 intel_aux_power_domain(struct intel_dp *intel_dp)
 {
-	switch (intel_dp->aux_ch) {
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+
+	switch (dig_port->aux_ch) {
 	case AUX_CH_A:
 		return POWER_DOMAIN_AUX_A;
 	case AUX_CH_B:
@@ -1568,7 +1572,7 @@ intel_aux_power_domain(struct intel_dp *intel_dp)
 	case AUX_CH_F:
 		return POWER_DOMAIN_AUX_F;
 	default:
-		MISSING_CASE(intel_dp->aux_ch);
+		MISSING_CASE(dig_port->aux_ch);
 		return POWER_DOMAIN_AUX_A;
 	}
 }
@@ -1576,7 +1580,8 @@ intel_aux_power_domain(struct intel_dp *intel_dp)
 static i915_reg_t g4x_aux_ctl_reg(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	enum aux_ch aux_ch = intel_dp->aux_ch;
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	enum aux_ch aux_ch = dig_port->aux_ch;
 
 	switch (aux_ch) {
 	case AUX_CH_B:
@@ -1592,7 +1597,8 @@ static i915_reg_t g4x_aux_ctl_reg(struct intel_dp *intel_dp)
 static i915_reg_t g4x_aux_data_reg(struct intel_dp *intel_dp, int index)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	enum aux_ch aux_ch = intel_dp->aux_ch;
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	enum aux_ch aux_ch = dig_port->aux_ch;
 
 	switch (aux_ch) {
 	case AUX_CH_B:
@@ -1608,7 +1614,8 @@ static i915_reg_t g4x_aux_data_reg(struct intel_dp *intel_dp, int index)
 static i915_reg_t ilk_aux_ctl_reg(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	enum aux_ch aux_ch = intel_dp->aux_ch;
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	enum aux_ch aux_ch = dig_port->aux_ch;
 
 	switch (aux_ch) {
 	case AUX_CH_A:
@@ -1626,7 +1633,8 @@ static i915_reg_t ilk_aux_ctl_reg(struct intel_dp *intel_dp)
 static i915_reg_t ilk_aux_data_reg(struct intel_dp *intel_dp, int index)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	enum aux_ch aux_ch = intel_dp->aux_ch;
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	enum aux_ch aux_ch = dig_port->aux_ch;
 
 	switch (aux_ch) {
 	case AUX_CH_A:
@@ -1644,7 +1652,8 @@ static i915_reg_t ilk_aux_data_reg(struct intel_dp *intel_dp, int index)
 static i915_reg_t skl_aux_ctl_reg(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	enum aux_ch aux_ch = intel_dp->aux_ch;
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	enum aux_ch aux_ch = dig_port->aux_ch;
 
 	switch (aux_ch) {
 	case AUX_CH_A:
@@ -1663,7 +1672,8 @@ static i915_reg_t skl_aux_ctl_reg(struct intel_dp *intel_dp)
 static i915_reg_t skl_aux_data_reg(struct intel_dp *intel_dp, int index)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	enum aux_ch aux_ch = intel_dp->aux_ch;
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	enum aux_ch aux_ch = dig_port->aux_ch;
 
 	switch (aux_ch) {
 	case AUX_CH_A:
@@ -1689,9 +1699,10 @@ static void
 intel_dp_aux_init(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	struct intel_encoder *encoder = &dig_port->base;
 
-	intel_dp->aux_ch = intel_aux_ch(dev_priv, encoder->port);
+	dig_port->aux_ch = intel_aux_ch(dev_priv, encoder->port);
 	intel_dp->aux_power_domain = intel_aux_power_domain(intel_dp);
 
 	if (INTEL_GEN(dev_priv) >= 9) {

drivers/gpu/drm/i915/intel_drv.h

@@ -1109,7 +1109,6 @@ struct intel_dp {
 	bool link_trained;
 	bool has_audio;
 	bool reset_link_params;
-	enum aux_ch aux_ch;
 	uint8_t dpcd[DP_RECEIVER_CAP_SIZE];
 	uint8_t psr_dpcd[EDP_PSR_RECEIVER_CAP_SIZE];
 	uint8_t downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
@@ -1214,6 +1213,8 @@ struct intel_digital_port {
 	enum irqreturn (*hpd_pulse)(struct intel_digital_port *, bool);
 	bool release_cl2_override;
 	uint8_t max_lanes;
+	/* Used for DP and ICL+ TypeC/DP and TypeC/HDMI ports. */
+	enum aux_ch aux_ch;
 	enum intel_display_power_domain ddi_io_power_domain;
 	enum tc_port_type tc_type;