diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h b/drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h new file mode 100644 index 0000000000..dc650be383 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h @@ -0,0 +1,125 @@ +/* + * 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_ */ |