drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/display/dc/inc/link_enc_cfg.h
Extension
.h
Size
4361 bytes
Lines
121
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#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. 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.

Annotation

Implementation Notes