drm/i915: Replace intel_bios_is_lane_reversal_needed() with intel_bios_encoder_lane_reversal()

The sole user of intel_bios_is_lane_reversal_needed() has
the devdata already located, so pass it in directly instead
of digging it again from vbt.ports[].

And rename the function to follow the common pattern for
these things.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230208015508.24824-5-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -3594,22 +3594,6 @@ intel_bios_is_port_hpd_inverted(const struct drm_i915_private *i915,
 	return devdata && devdata->child.hpd_invert;
 }
 
-/**
- * intel_bios_is_lane_reversal_needed - if lane reversal needed on port
- * @i915:       i915 device instance
- * @port:       port to check
- *
- * Return true if port requires lane reversal
- */
-bool
-intel_bios_is_lane_reversal_needed(const struct drm_i915_private *i915,
-				   enum port port)
-{
-	const struct intel_bios_encoder_data *devdata = i915->display.vbt.ports[port];
-
-	return devdata && devdata->child.lane_reversal;
-}
-
 enum aux_ch intel_bios_port_aux_ch(struct drm_i915_private *i915,
 				   enum port port)
 {
@@ -3774,6 +3758,11 @@ bool intel_bios_encoder_supports_tbt(const struct intel_bios_encoder_data *devda
 	return devdata->i915->display.vbt.version >= 209 && devdata->child.tbt;
 }
 
+bool intel_bios_encoder_lane_reversal(const struct intel_bios_encoder_data *devdata)
+{
+	return devdata && devdata->child.lane_reversal;
+}
+
 const struct intel_bios_encoder_data *
 intel_bios_encoder_data_lookup(struct drm_i915_private *i915, enum port port)
 {

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

@@ -250,8 +250,6 @@ bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv, enum por
 bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv, enum port *port);
 bool intel_bios_is_port_hpd_inverted(const struct drm_i915_private *i915,
 				     enum port port);
-bool intel_bios_is_lane_reversal_needed(const struct drm_i915_private *i915,
-					enum port port);
 enum aux_ch intel_bios_port_aux_ch(struct drm_i915_private *dev_priv, enum port port);
 bool intel_bios_get_dsc_params(struct intel_encoder *encoder,
 			       struct intel_crtc_state *crtc_state,
@@ -275,5 +273,6 @@ bool intel_bios_encoder_supports_tbt(const struct intel_bios_encoder_data *devda
 bool intel_bios_encoder_is_lspcon(const struct intel_bios_encoder_data *devdata);
 int intel_bios_encoder_dp_boost_level(const struct intel_bios_encoder_data *devdata);
 int intel_bios_encoder_hdmi_boost_level(const struct intel_bios_encoder_data *devdata);
+bool intel_bios_encoder_lane_reversal(const struct intel_bios_encoder_data *devdata);
 
 #endif /* _INTEL_BIOS_H_ */

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

@@ -4500,7 +4500,7 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 			intel_de_read(dev_priv, DDI_BUF_CTL(port))
 			& (DDI_BUF_PORT_REVERSAL | DDI_A_4_LANES);
 
-	if (intel_bios_is_lane_reversal_needed(dev_priv, port))
+	if (intel_bios_encoder_lane_reversal(devdata))
 		dig_port->saved_port_bits |= DDI_BUF_PORT_REVERSAL;
 
 	dig_port->dp.output_reg = INVALID_MMIO_REG;