/*
* 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_ENC_CFG_H_
#define DC_INC_LINK_ENC_CFG_H_
/* This module implements functionality for dynamically assigning DIG link
* encoder resources to display endpoints (links).
*/
#include "core_types.h"
/*
* Initialise link encoder resource tracking.
*/
void link_enc_cfg_init(
const struct dc *dc,
struct dc_state *state);
/*
* Copies a link encoder assignment from another state.
*/
void link_enc_cfg_copy(const struct dc_state *src_ctx, struct dc_state *dst_ctx);
/*
* Algorithm for assigning available DIG link encoders to streams.
*
* Update link_enc_assignments table and link_enc_avail list accordingly in
* struct resource_context.
*
* Loop over all streams twice:
* a) First assign encoders to unmappable endpoints.
* b) Then assign encoders to mappable endpoints.
*/
void link_enc_cfg_link_encs_assign(
struct dc *dc,
struct dc_state *state,
struct dc_stream_state *streams[],
uint8_t stream_count);
/*
* Unassign a link encoder from a stream.
*
* Update link_enc_assignments table and link_enc_avail list accordingly in
* struct resource_context.
*/
void link_enc_cfg_link_enc_unassign(
struct dc_state *state,
struct dc_stream_state *stream);
/*
* Check whether the transmitter driven by a link encoder is a mappable
* endpoint.
*/
bool link_enc_cfg_is_transmitter_mappable(
struct dc *dc,
struct link_encoder *link_enc);
/* Return stream using DIG link encoder resource. NULL if unused. */
struct dc_stream_state *link_enc_cfg_get_stream_using_link_enc(
struct dc *dc,
enum engine_id eng_id);
/* Return link using DIG link encoder resource. NULL if unused. */
struct dc_link *link_enc_cfg_get_link_using_link_enc(
struct dc *dc,
enum engine_id eng_id);
/* Return DIG link encoder used by link. NULL if unused. */
struct link_encoder *link_enc_cfg_get_link_enc_used_by_link(
struct dc *dc,
const struct dc_link *link);
/* Return next available DIG link encoder. NULL if none available. */
struct link_encoder *link_enc_cfg_get_next_avail_link_enc(struct dc *dc);
/* Return DIG link encoder used by stream. NULL if unused. */
struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream(
struct dc *dc,
const struct dc_stream_state *stream);
/* Return DIG link encoder. NULL if unused. */
struct link_encoder *link_enc_cfg_get_link_enc(const struct dc_link *link);
/* Return DIG link encoder used by stream in current/previous state. NULL if unused. */
struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream_current(
struct dc *dc,
const struct dc_stream_state *stream);
/* Return true if encoder available to use. */
bool link_enc_cfg_is_link_enc_avail(struct dc *dc, enum engine_id eng_id, struct dc_link *link);
/* Returns true if encoder assignments in supplied state pass validity checks. */
bool link_enc_cfg_validate(struct dc *dc, struct dc_state *state);
/* Set the link encoder assignment mode for the current_state to LINK_ENC_CFG_TRANSIENT mode.
* This indicates that a new_state is in the process of being applied to hardware.
* During this transition, old and new encoder assignments should be accessible from the old_state.
* Only allow transition into transient mode if new encoder assignments are valid.
*/
void link_enc_cfg_set_transient_mode(struct dc *dc, struct dc_state *current_state, struct dc_state *new_state);
#endif /* DC_INC_LINK_ENC_CFG_H_ */
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