drm/amd/display: Default max bpc to 16 for eDP

[Why]
Some 10bit eDP panels don't lightup after we cap bpc to 8.

[How]
Set default max_bpc to 16 for edp connector type.
Signed-off-by: Roman Li <roman.li@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -5561,9 +5561,9 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
 
 	drm_connector_attach_max_bpc_property(&aconnector->base, 8, 16);
 
-	/* This defaults to the max in the range, but we want 8bpc. */
-	aconnector->base.state->max_bpc = 8;
-	aconnector->base.state->max_requested_bpc = 8;
+	/* This defaults to the max in the range, but we want 8bpc for non-edp. */
+	aconnector->base.state->max_bpc = (connector_type == DRM_MODE_CONNECTOR_eDP) ? 16 : 8;
+	aconnector->base.state->max_requested_bpc = aconnector->base.state->max_bpc;
 
 	if (connector_type == DRM_MODE_CONNECTOR_eDP &&
 	    dc_is_dmcu_initialized(adev->dm.dc)) {