drm/i915/display: add intel_encoder_is_*() and _to_*() functions

Add a number of encoder based functions to check if the port/phy of the
encoder is of a certain type, or to convert to phy or tc_port. Initially
these are just wrappers around the existing functions, but they can be
improved to use VBT data or use some cached info in the future.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/7b2d350ee42883f2784030c649d16f983bd407bd.1710949619.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_cx0_phy.c

@@ -29,6 +29,7 @@
 #define INTEL_CX0_LANE1		BIT(1)
 #define INTEL_CX0_BOTH_LANES	(INTEL_CX0_LANE1 | INTEL_CX0_LANE0)
 
+/* Prefer intel_encoder_is_c10phy() */
 bool intel_is_c10phy(struct drm_i915_private *i915, enum phy phy)
 {
 	if ((IS_LUNARLAKE(i915) || IS_METEORLAKE(i915)) && phy < PHY_C)
@@ -37,6 +38,14 @@ bool intel_is_c10phy(struct drm_i915_private *i915, enum phy phy)
 	return false;
 }
 
+bool intel_encoder_is_c10phy(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum phy phy = intel_encoder_to_phy(encoder);
+
+	return intel_is_c10phy(i915, phy);
+}
+
 static int lane_mask_to_lane(u8 lane_mask)
 {
 	if (WARN_ON((lane_mask & ~INTEL_CX0_BOTH_LANES) ||

drivers/gpu/drm/i915/display/intel_cx0_phy.h

@@ -23,6 +23,7 @@ struct intel_encoder;
 struct intel_hdmi;
 
 bool intel_is_c10phy(struct drm_i915_private *dev_priv, enum phy phy);
+bool intel_encoder_is_c10phy(struct intel_encoder *encoder);
 void intel_mtl_pll_enable(struct intel_encoder *encoder,
 			  const struct intel_crtc_state *crtc_state);
 void intel_mtl_pll_disable(struct intel_encoder *encoder);

drivers/gpu/drm/i915/display/intel_display.c

@@ -1836,6 +1836,7 @@ static void i9xx_pfit_enable(const struct intel_crtc_state *crtc_state)
 	intel_de_write(dev_priv, BCLRPAT(crtc->pipe), 0);
 }
 
+/* Prefer intel_encoder_is_combo() */
 bool intel_phy_is_combo(struct drm_i915_private *dev_priv, enum phy phy)
 {
 	if (phy == PHY_NONE)
@@ -1857,6 +1858,7 @@ bool intel_phy_is_combo(struct drm_i915_private *dev_priv, enum phy phy)
 		return false;
 }
 
+/* Prefer intel_encoder_is_tc() */
 bool intel_phy_is_tc(struct drm_i915_private *dev_priv, enum phy phy)
 {
 	/*
@@ -1877,6 +1879,7 @@ bool intel_phy_is_tc(struct drm_i915_private *dev_priv, enum phy phy)
 	return false;
 }
 
+/* Prefer intel_encoder_is_snps() */
 bool intel_phy_is_snps(struct drm_i915_private *dev_priv, enum phy phy)
 {
 	/*
@@ -1886,6 +1889,7 @@ bool intel_phy_is_snps(struct drm_i915_private *dev_priv, enum phy phy)
 	return IS_DG2(dev_priv) && phy > PHY_NONE && phy <= PHY_E;
 }
 
+/* Prefer intel_encoder_to_phy() */
 enum phy intel_port_to_phy(struct drm_i915_private *i915, enum port port)
 {
 	if (DISPLAY_VER(i915) >= 13 && port >= PORT_D_XELPD)
@@ -1903,6 +1907,7 @@ enum phy intel_port_to_phy(struct drm_i915_private *i915, enum port port)
 	return PHY_A + port - PORT_A;
 }
 
+/* Prefer intel_encoder_to_tc() */
 enum tc_port intel_port_to_tc(struct drm_i915_private *dev_priv, enum port port)
 {
 	if (!intel_phy_is_tc(dev_priv, intel_port_to_phy(dev_priv, port)))
@@ -1914,6 +1919,41 @@ enum tc_port intel_port_to_tc(struct drm_i915_private *dev_priv, enum port port)
 		return TC_PORT_1 + port - PORT_C;
 }
 
+enum phy intel_encoder_to_phy(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+
+	return intel_port_to_phy(i915, encoder->port);
+}
+
+bool intel_encoder_is_combo(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+
+	return intel_phy_is_combo(i915, intel_encoder_to_phy(encoder));
+}
+
+bool intel_encoder_is_snps(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+
+	return intel_phy_is_snps(i915, intel_encoder_to_phy(encoder));
+}
+
+bool intel_encoder_is_tc(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+
+	return intel_phy_is_tc(i915, intel_encoder_to_phy(encoder));
+}
+
+enum tc_port intel_encoder_to_tc(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+
+	return intel_port_to_tc(i915, encoder->port);
+}
+
 enum intel_display_power_domain
 intel_aux_power_domain(struct intel_digital_port *dig_port)
 {

drivers/gpu/drm/i915/display/intel_display.h

@@ -448,6 +448,13 @@ bool intel_phy_is_tc(struct drm_i915_private *dev_priv, enum phy phy);
 bool intel_phy_is_snps(struct drm_i915_private *dev_priv, enum phy phy);
 enum tc_port intel_port_to_tc(struct drm_i915_private *dev_priv,
 			      enum port port);
+
+enum phy intel_encoder_to_phy(struct intel_encoder *encoder);
+bool intel_encoder_is_combo(struct intel_encoder *encoder);
+bool intel_encoder_is_snps(struct intel_encoder *encoder);
+bool intel_encoder_is_tc(struct intel_encoder *encoder);
+enum tc_port intel_encoder_to_tc(struct intel_encoder *encoder);
+
 int intel_get_pipe_from_crtc_id_ioctl(struct drm_device *dev, void *data,
 				      struct drm_file *file_priv);