drm/i915/dg2: add DG2+ TRANS_DDI_FUNC_CTL DP 2.0 128b/132b mode

Unfortunately, the DP 2.0 128b/132b DDI mode selection in the register
conflicts with FDI. Since we have to deal with both meanings in the same
code, for different platforms, clarify the macro name so we don't
forget.

Bspec: 50493
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/260e4da302d47ae50122eb8d517be6ac3ccb15f2.1631191763.git.jani.nikula@intel.com

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

@@ -489,7 +489,7 @@ intel_ddi_transcoder_func_reg_val_get(struct intel_encoder *encoder,
 		if (crtc_state->hdmi_high_tmds_clock_ratio)
 			temp |= TRANS_DDI_HIGH_TMDS_CHAR_RATE;
 	} else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG)) {
-		temp |= TRANS_DDI_MODE_SELECT_FDI;
+		temp |= TRANS_DDI_MODE_SELECT_FDI_OR_128B132B;
 		temp |= (crtc_state->fdi_lanes - 1) << 1;
 	} else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST)) {
 		temp |= TRANS_DDI_MODE_SELECT_DP_MST;
@@ -679,7 +679,7 @@ bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector)
 		ret = false;
 		break;
 
-	case TRANS_DDI_MODE_SELECT_FDI:
+	case TRANS_DDI_MODE_SELECT_FDI_OR_128B132B:
 		ret = type == DRM_MODE_CONNECTOR_VGA;
 		break;
 
@@ -3558,7 +3558,7 @@ static void intel_ddi_read_func_ctl(struct intel_encoder *encoder,
 		pipe_config->output_types |= BIT(INTEL_OUTPUT_HDMI);
 		pipe_config->lane_count = 4;
 		break;
-	case TRANS_DDI_MODE_SELECT_FDI:
+	case TRANS_DDI_MODE_SELECT_FDI_OR_128B132B:
 		pipe_config->output_types |= BIT(INTEL_OUTPUT_ANALOG);
 		break;
 	case TRANS_DDI_MODE_SELECT_DP_SST:

drivers/gpu/drm/i915/i915_reg.h

@@ -10173,7 +10173,7 @@ enum skl_power_gate {
 #define  TRANS_DDI_MODE_SELECT_DVI	(1 << 24)
 #define  TRANS_DDI_MODE_SELECT_DP_SST	(2 << 24)
 #define  TRANS_DDI_MODE_SELECT_DP_MST	(3 << 24)
-#define  TRANS_DDI_MODE_SELECT_FDI	(4 << 24)
+#define  TRANS_DDI_MODE_SELECT_FDI_OR_128B132B	(4 << 24)
 #define  TRANS_DDI_BPC_MASK		(7 << 20)
 #define  TRANS_DDI_BPC_8		(0 << 20)
 #define  TRANS_DDI_BPC_10		(1 << 20)