126 lines · c
1/*2 * Copyright 2021 Advanced Micro Devices, Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: AMD23 *24 */25 26#ifndef DC_INC_LINK_ENC_CFG_H_27#define DC_INC_LINK_ENC_CFG_H_28 29/* This module implements functionality for dynamically assigning DIG link30 * encoder resources to display endpoints (links).31 */32 33#include "core_types.h"34 35/*36 * Initialise link encoder resource tracking.37 */38void link_enc_cfg_init(39 const struct dc *dc,40 struct dc_state *state);41 42/*43 * Copies a link encoder assignment from another state.44 */45void link_enc_cfg_copy(const struct dc_state *src_ctx, struct dc_state *dst_ctx);46 47/*48 * Algorithm for assigning available DIG link encoders to streams.49 *50 * Update link_enc_assignments table and link_enc_avail list accordingly in51 * struct resource_context.52 *53 * Loop over all streams twice:54 * a) First assign encoders to unmappable endpoints.55 * b) Then assign encoders to mappable endpoints.56 */57void link_enc_cfg_link_encs_assign(58 struct dc *dc,59 struct dc_state *state,60 struct dc_stream_state *streams[],61 uint8_t stream_count);62 63/*64 * Unassign a link encoder from a stream.65 *66 * Update link_enc_assignments table and link_enc_avail list accordingly in67 * struct resource_context.68 */69void link_enc_cfg_link_enc_unassign(70 struct dc_state *state,71 struct dc_stream_state *stream);72 73/*74 * Check whether the transmitter driven by a link encoder is a mappable75 * endpoint.76 */77bool link_enc_cfg_is_transmitter_mappable(78 struct dc *dc,79 struct link_encoder *link_enc);80 81/* Return stream using DIG link encoder resource. NULL if unused. */82struct dc_stream_state *link_enc_cfg_get_stream_using_link_enc(83 struct dc *dc,84 enum engine_id eng_id);85 86/* Return link using DIG link encoder resource. NULL if unused. */87struct dc_link *link_enc_cfg_get_link_using_link_enc(88 struct dc *dc,89 enum engine_id eng_id);90 91/* Return DIG link encoder used by link. NULL if unused. */92struct link_encoder *link_enc_cfg_get_link_enc_used_by_link(93 struct dc *dc,94 const struct dc_link *link);95 96/* Return next available DIG link encoder. NULL if none available. */97struct link_encoder *link_enc_cfg_get_next_avail_link_enc(struct dc *dc);98 99/* Return DIG link encoder used by stream. NULL if unused. */100struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream(101 struct dc *dc,102 const struct dc_stream_state *stream);103 104/* Return DIG link encoder. NULL if unused. */105struct link_encoder *link_enc_cfg_get_link_enc(const struct dc_link *link);106 107/* Return DIG link encoder used by stream in current/previous state. NULL if unused. */108struct link_encoder *link_enc_cfg_get_link_enc_used_by_stream_current(109 struct dc *dc,110 const struct dc_stream_state *stream);111 112/* Return true if encoder available to use. */113bool link_enc_cfg_is_link_enc_avail(struct dc *dc, enum engine_id eng_id, struct dc_link *link);114 115/* Returns true if encoder assignments in supplied state pass validity checks. */116bool link_enc_cfg_validate(struct dc *dc, struct dc_state *state);117 118/* Set the link encoder assignment mode for the current_state to LINK_ENC_CFG_TRANSIENT mode.119 * This indicates that a new_state is in the process of being applied to hardware.120 * During this transition, old and new encoder assignments should be accessible from the old_state.121 * Only allow transition into transient mode if new encoder assignments are valid.122 */123void link_enc_cfg_set_transient_mode(struct dc *dc, struct dc_state *current_state, struct dc_state *new_state);124 125#endif /* DC_INC_LINK_ENC_CFG_H_ */126