drm/amd/display: upstream link_dp_dpia_bw.c

[WHY & HOW]
- make link_dp_dpia_bw.c available for linux.
- add the verify link peak bw
- clean up code and comment format.
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Mustapha Ghaddar <mghaddar@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -558,6 +558,18 @@ void dc_link_set_usb4_req_bw_req(struct dc_link *link, int req_bw);
  */
 void dc_link_get_usb4_req_bw_resp(struct dc_link *link, uint8_t bw, uint8_t result);
 
+/*
+ * Handle the USB4 BW Allocation related functionality here:
+ * Plug => Try to allocate max bw from timing parameters supported by the sink
+ * Unplug => de-allocate bw
+ *
+ * @link: pointer to the dc_link struct instance
+ * @peak_bw: Peak bw used by the link/sink
+ *
+ * return: allocated bw else return 0
+ */
+int dc_link_dp_dpia_handle_usb4_bandwidth_allocation_for_link(struct dc_link *link, int peak_bw);
+
 /* TODO: this is not meant to be exposed to DM. Should switch to stream update
  * interface i.e stream_update->dsc_config
  */

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.h

@@ -44,33 +44,4 @@ enum bw_type {
  */
 bool set_dptx_usb4_bw_alloc_support(struct dc_link *link);
 
-/*
- * Return the response_ready flag from dc_link struct
- *
- * @link: pointer to the dc_link struct instance
- *
- * return: response_ready flag from dc_link struct
- */
-bool get_cm_response_ready_flag(struct dc_link *link);
-
-/*
- * Get the Max Available BW or Max Estimated BW for each Host Router
- *
- * @link: pointer to the dc_link struct instance
- * @type: ESTIMATD BW or MAX AVAILABLE BW
- *
- * return: response_ready flag from dc_link struct
- */
-int get_host_router_total_bw(struct dc_link *link, uint8_t type);
-
-/*
- * Cleanup function for when the dpia is unplugged to reset struct
- * and perform any required clean up
- *
- * @link: pointer to the dc_link struct instance
- *
- * return: none
- */
-bool dpia_bw_alloc_unplug(struct dc_link *link);
-
 #endif /* DC_INC_LINK_DP_DPIA_BW_H_ */