diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.h')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.h new file mode 100644 index 000000000000..58eb7b581093 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.h @@ -0,0 +1,100 @@ +/* + * Copyright 2021 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +#ifndef DC_INC_LINK_DP_DPIA_BW_H_ +#define DC_INC_LINK_DP_DPIA_BW_H_ + +/* + * Host Router BW type + */ +enum bw_type { + HOST_ROUTER_BW_ESTIMATED, + HOST_ROUTER_BW_ALLOCATED, + HOST_ROUTER_BW_INVALID, +}; + +/* + * Enable BW Allocation Mode Support from the DP-Tx side + * + * @link: pointer to the dc_link struct instance + * + * return: SUCCESS or FAILURE + */ +bool set_dptx_usb4_bw_alloc_support(struct dc_link *link); + +/* + * Send a request from DP-Tx requesting to allocate BW remotely after + * allocating it locally. This will get processed by CM and a CB function + * will be called. + * + * @link: pointer to the dc_link struct instance + * @req_bw: The requested bw in Kbyte to allocated + * + * return: none + */ +void set_usb4_req_bw_req(struct dc_link *link, int req_bw); + +/* + * CB function for when the status of the Req above is complete. We will + * find out the result of allocating on CM and update structs accordingly + * + * @link: pointer to the dc_link struct instance + * @bw: Allocated or Estimated BW depending on the result + * @result: Response type + * + * return: none + */ +void get_usb4_req_bw_resp(struct dc_link *link, uint8_t bw, uint8_t result); + +/* + * 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_ */ |