drm/amd/display: Create amdgpu_dm_wb_connector

[WHY]
We need to track the dc_link and it would get confusing if
re-using the amdgpu_dm_connector.

[HOW]
Creating new amdgpu_dm_wb_connector.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -4496,14 +4496,14 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
 		link = dc_get_link_at_index(dm->dc, i);
 
 		if (link->connector_signal == SIGNAL_TYPE_VIRTUAL) {
-			struct drm_writeback_connector *wbcon = kzalloc(sizeof(*wbcon), GFP_KERNEL);
+			struct amdgpu_dm_wb_connector *wbcon = kzalloc(sizeof(*wbcon), GFP_KERNEL);
 
 			if (!wbcon) {
 				DRM_ERROR("KMS: Failed to allocate writeback connector\n");
 				continue;
 			}
 
-			if (amdgpu_dm_wb_connector_init(dm, wbcon)) {
+			if (amdgpu_dm_wb_connector_init(dm, wbcon, i)) {
 				DRM_ERROR("KMS: Failed to initialize writeback connector\n");
 				kfree(wbcon);
 				continue;
@@ -7609,6 +7609,7 @@ static int amdgpu_dm_connector_init(struct amdgpu_display_manager *dm,
 	struct dc_link *link = dc_get_link_at_index(dc, link_index);
 	struct amdgpu_i2c_adapter *i2c;
 
+	/* Not needed for writeback connector */
 	link->priv = aconnector;
 
 

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

@@ -32,6 +32,7 @@
 #include <drm/drm_crtc.h>
 #include <drm/drm_plane.h>
 #include "link_service_types.h"
+#include <drm/drm_writeback.h>
 
 /*
  * This file contains the definition for amdgpu_display_manager
@@ -714,6 +715,13 @@ static inline void amdgpu_dm_set_mst_status(uint8_t *status,
 
 #define to_amdgpu_dm_connector(x) container_of(x, struct amdgpu_dm_connector, base)
 
+struct amdgpu_dm_wb_connector {
+	struct drm_writeback_connector base;
+	struct dc_link *link;
+};
+
+#define to_amdgpu_dm_wb_connector(x) container_of(x, struct amdgpu_dm_wb_connector, base)
+
 extern const struct amdgpu_ip_block_version dm_ip_block;
 
 struct dm_plane_state {

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

@@ -30,6 +30,7 @@
 #include "amdgpu_dm.h"
 #include "amdgpu_dm_wb.h"
 #include "amdgpu_display.h"
+#include "dc.h"
 
 #include <drm/drm_atomic_state_helper.h>
 #include <drm/drm_modeset_helper_vtables.h>
@@ -183,13 +184,18 @@ static const struct drm_connector_helper_funcs amdgpu_dm_wb_conn_helper_funcs =
 };
 
 int amdgpu_dm_wb_connector_init(struct amdgpu_display_manager *dm,
-				struct drm_writeback_connector *wbcon)
+				struct amdgpu_dm_wb_connector *wbcon,
+				uint32_t link_index)
 {
+	struct dc *dc = dm->dc;
+	struct dc_link *link = dc_get_link_at_index(dc, link_index);
 	int res = 0;
 
-	drm_connector_helper_add(&wbcon->base, &amdgpu_dm_wb_conn_helper_funcs);
+	wbcon->link = link;
 
-	res = drm_writeback_connector_init(&dm->adev->ddev, wbcon,
+	drm_connector_helper_add(&wbcon->base.base, &amdgpu_dm_wb_conn_helper_funcs);
+
+	res = drm_writeback_connector_init(&dm->adev->ddev, &wbcon->base,
 					    &amdgpu_dm_wb_connector_funcs,
 					    &amdgpu_dm_wb_encoder_helper_funcs,
 					    amdgpu_dm_wb_formats,
@@ -202,8 +208,8 @@ int amdgpu_dm_wb_connector_init(struct amdgpu_display_manager *dm,
 	 * Some of the properties below require access to state, like bpc.
 	 * Allocate some default initial connector state with our reset helper.
 	 */
-	if (wbcon->base.funcs->reset)
-		wbcon->base.funcs->reset(&wbcon->base);
+	if (wbcon->base.base.funcs->reset)
+		wbcon->base.base.funcs->reset(&wbcon->base.base);
 
 	return 0;
 }

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.h

@@ -30,6 +30,7 @@
 #include <drm/drm_writeback.h>
 
 int amdgpu_dm_wb_connector_init(struct amdgpu_display_manager *dm,
-				struct drm_writeback_connector *wbcon);
+				struct amdgpu_dm_wb_connector *dm_wbcon,
+				uint32_t link_index);
 
 #endif