drm/amd/display: Remove get_connector_for_link.

We can keep a 1:1 relation between a link and a physical
connector and hence skip the iteration. This function
is used in context of only physical connetors.
Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -148,21 +148,6 @@ static struct amdgpu_connector *get_connector_for_sink(
 	return NULL;
 }
 
-static struct amdgpu_connector *get_connector_for_link(
-	struct drm_device *dev,
-	const struct dc_link *link)
-{
-	struct drm_connector *connector;
-
-	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-		struct amdgpu_connector *aconnector = to_amdgpu_connector(connector);
-		if (aconnector->dc_link == link)
-			return aconnector;
-	}
-
-	return NULL;
-}
-
 static void get_payload_table(
 		struct amdgpu_connector *aconnector,
 		struct dp_mst_stream_allocation_table *proposed_table)
@@ -363,9 +348,7 @@ bool dm_helpers_dp_mst_start_top_mgr(
 		const struct dc_link *link,
 		bool boot)
 {
-	struct amdgpu_device *adev = ctx->driver_context;
-	struct drm_device *dev = adev->ddev;
-	struct amdgpu_connector *aconnector = get_connector_for_link(dev, link);
+	struct amdgpu_connector *aconnector = link->priv;
 
 	if (!aconnector) {
 			DRM_ERROR("Failed to found connector for link!");
@@ -388,9 +371,7 @@ void dm_helpers_dp_mst_stop_top_mgr(
 		struct dc_context *ctx,
 		const struct dc_link *link)
 {
-	struct amdgpu_device *adev = ctx->driver_context;
-	struct drm_device *dev = adev->ddev;
-	struct amdgpu_connector *aconnector = get_connector_for_link(dev, link);
+	struct amdgpu_connector *aconnector = link->priv;
 
 	if (!aconnector) {
 			DRM_ERROR("Failed to found connector for link!");
@@ -412,9 +393,7 @@ bool dm_helpers_dp_read_dpcd(
 		uint32_t size)
 {
 
-	struct amdgpu_device *adev = ctx->driver_context;
-	struct drm_device *dev = adev->ddev;
-	struct amdgpu_connector *aconnector = get_connector_for_link(dev, link);
+	struct amdgpu_connector *aconnector = link->priv;
 
 	if (!aconnector) {
 		DRM_ERROR("Failed to found connector for link!");
@@ -432,10 +411,7 @@ bool dm_helpers_dp_write_dpcd(
 		const uint8_t *data,
 		uint32_t size)
 {
-
-	struct amdgpu_device *adev = ctx->driver_context;
-	struct drm_device *dev = adev->ddev;
-	struct amdgpu_connector *aconnector = get_connector_for_link(dev, link);
+	struct amdgpu_connector *aconnector = link->priv;
 
 	if (!aconnector) {
 		DRM_ERROR("Failed to found connector for link!");
@@ -451,9 +427,7 @@ bool dm_helpers_submit_i2c(
 		const struct dc_link *link,
 		struct i2c_command *cmd)
 {
-	struct amdgpu_device *adev = ctx->driver_context;
-	struct drm_device *dev = adev->ddev;
-	struct amdgpu_connector *aconnector = get_connector_for_link(dev, link);
+	struct amdgpu_connector *aconnector = link->priv;
 	struct i2c_msg *msgs;
 	int i = 0;
 	int num = cmd->number_of_payloads;

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

@@ -2002,6 +2002,7 @@ int amdgpu_dm_connector_init(
 	struct dc *dc = dm->dc;
 	const struct dc_link *link = dc_get_link_at_index(dc, link_index);
 	struct amdgpu_i2c_adapter *i2c;
+	((struct dc_link *)link)->priv = aconnector;
 
 	DRM_DEBUG_KMS("%s()\n", __func__);
 

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

@@ -592,6 +592,8 @@ struct dc_link {
 	struct psr_caps psr_caps;
 	bool test_pattern_enabled;
 	union compliance_test_state compliance_test_state;
+
+	void *priv;
 };
 
 struct dpcd_caps {