drm/amd/display: Add option to configure mapping policy for edp0 on dp1

[Why]
We want flexibility to choose how pwrseq instance is mapped to eDP panel

[How]
Add configuration option to choose the pwrseq mapping policy.
When enabled, allow fixed mapping between DIG inst to pwrseq inst.
Reviewed-by: Anthony Koo <anthony.koo@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Lewis Huang <lewis.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc.h

@@ -437,6 +437,7 @@ struct dc_config {
 	bool usb4_bw_alloc_support;
 	bool allow_0_dtb_clk;
 	bool use_assr_psp_message;
+	bool support_edp0_on_dp1;
 };
 
 enum visual_confirm {

drivers/gpu/drm/amd/display/dc/dcn31/dcn31_panel_cntl.c

@@ -173,5 +173,12 @@ void dcn31_panel_cntl_construct(
 		break;
 	}
 
-	dcn31_panel_cntl->base.pwrseq_inst = pwrseq_inst;
+	if (dcn31_panel_cntl->base.ctx->dc->config.support_edp0_on_dp1)
+		//If supported, power sequencer mapping shall follow the DIG instance
+		dcn31_panel_cntl->base.pwrseq_inst = pwrseq_inst;
+	else
+		/* If not supported, pwrseq will be assigned in order,
+		 * so first pwrseq will be assigned to first panel instance (legacy behavior)
+		 */
+		dcn31_panel_cntl->base.pwrseq_inst = dcn31_panel_cntl->base.inst;
 }