drm/amd/display: Handle persistence in DM

[Why]
Remove dm_write_persistent_data and dm_read_persistent_data as
persistence should be handled in DM.

[How]
Remove functions. Move read/write calls into DM layer while maintaining
logic.

Signed-off-by: Jaehyun Chung <[e-mail]>
Reviewed-by: Anthony Koo <[e-mail]>
Acked-by: Rodrigo Siqueira <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 {
 }
 
-bool dm_write_persistent_data(struct dc_context *ctx,
-		const struct dc_sink *sink,
-		const char *module_name,
-		const char *key_name,
-		void *params,
-		unsigned int size,
-		struct persistent_data_flag *flag)
-{
-	/*TODO implement*/
-	return false;
-}
-
-bool dm_read_persistent_data(struct dc_context *ctx,
-				const struct dc_sink *sink,
-				const char *module_name,
-				const char *key_name,
-				void *params,
-				unsigned int size,
-				struct persistent_data_flag *flag)
-{
-	/*TODO implement*/
-	return false;
-}
-
 /**** power component interfaces ****/
-

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

···
 	bool save_per_edid;
 };
 
-/* Call to write data in registry editor for persistent data storage.
- *
- * \inputs      sink - identify edid/link for registry folder creation
- *              module name - identify folders for registry
- *              key name - identify keys within folders for registry
- *              params - value to write in defined folder/key
- *              size - size of the input params
- *              flag - determine whether to save by link or edid
- *
- * \returns     true - call is successful
- *              false - call failed
- *
- * sink         module         key
- * -----------------------------------------------------------------------------
- * NULL         NULL           NULL     - failure
- * NULL         NULL           -        - create key with param value
- *                                                      under base folder
- * NULL         -              NULL     - create module folder under base folder
- * -            NULL           NULL     - failure
- * NULL         -              -        - create key under module folder
- *                                            with no edid/link identification
- * -            NULL           -        - create key with param value
- *                                                       under base folder
- * -            -              NULL     - create module folder under base folder
- * -            -              -        - create key under module folder
- *                                              with edid/link identification
- */
-bool dm_write_persistent_data(struct dc_context *ctx,
-		const struct dc_sink *sink,
-		const char *module_name,
-		const char *key_name,
-		void *params,
-		unsigned int size,
-		struct persistent_data_flag *flag);
-
-
-/* Call to read data in registry editor for persistent data storage.
- *
- * \inputs      sink - identify edid/link for registry folder creation
- *              module name - identify folders for registry
- *              key name - identify keys within folders for registry
- *              size - size of the output params
- *              flag - determine whether it was save by link or edid
- *
- * \returns     params - value read from defined folder/key
- *              true - call is successful
- *              false - call failed
- *
- * sink         module         key
- * -----------------------------------------------------------------------------
- * NULL         NULL           NULL     - failure
- * NULL         NULL           -        - read key under base folder
- * NULL         -              NULL     - failure
- * -            NULL           NULL     - failure
- * NULL         -              -        - read key under module folder
- *                                             with no edid/link identification
- * -            NULL           -        - read key under base folder
- * -            -              NULL     - failure
- * -            -              -        - read key under module folder
- *                                              with edid/link identification
- */
-bool dm_read_persistent_data(struct dc_context *ctx,
-		const struct dc_sink *sink,
-		const char *module_name,
-		const char *key_name,
-		void *params,
-		unsigned int size,
-		struct persistent_data_flag *flag);
-
 bool dm_query_extended_brightness_caps
 	(struct dc_context *ctx, enum dm_acpi_display_type display,
 			struct dm_acpi_atif_backlight_caps *pCaps);

drivers/gpu/drm/amd/display/modules/inc/mod_stats.h

···
 	bool dummy;
 };
 
-struct mod_stats *mod_stats_create(struct dc *dc);
+struct mod_stats_init_params {
+	unsigned int stats_enable;
+	unsigned int stats_entries;
+};
+
+struct mod_stats *mod_stats_create(struct dc *dc,
+		struct mod_stats_init_params *init_params);
 
 void mod_stats_destroy(struct mod_stats *mod_stats);