drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.h

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.h

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.h
Extension
.h
Size
6760 bytes
Lines
202
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_LINK_DP_TRAINING_H__
#define __DC_LINK_DP_TRAINING_H__
#include "link_service.h"

bool perform_link_training_with_retries(
	const struct dc_link_settings *link_setting,
	bool skip_video_pattern,
	int attempts,
	struct pipe_ctx *pipe_ctx,
	enum signal_type signal,
	bool do_fallback);

enum link_training_result dp_perform_link_training(
		struct dc_link *link,
		const struct link_resource *link_res,
		const struct dc_link_settings *link_settings,
		bool skip_video_pattern);

bool dp_set_hw_training_pattern(
		struct dc_link *link,
		const struct link_resource *link_res,
		enum dc_dp_training_pattern pattern,
		uint32_t offset);

void dp_set_hw_test_pattern(
		struct dc_link *link,
		const struct link_resource *link_res,
		enum dp_test_pattern test_pattern,
		uint8_t *custom_pattern,
		uint32_t custom_pattern_size);

enum dc_status dpcd_set_training_pattern(
	struct dc_link *link,
	enum dc_dp_training_pattern training_pattern);

/* Write DPCD drive settings. */
enum dc_status dpcd_set_lane_settings(
	struct dc_link *link,
	const struct link_training_settings *link_training_setting,
	uint32_t offset);

/* Write DPCD link configuration data. */
enum dc_status dpcd_set_link_settings(
	struct dc_link *link,
	const struct link_training_settings *lt_settings);

void dpcd_set_lt_pattern_and_lane_settings(
	struct dc_link *link,
	const struct link_training_settings *lt_settings,
	enum dc_dp_training_pattern pattern,
	uint32_t offset);

/* Read training status and adjustment requests from DPCD. */
enum dc_status dp_get_lane_status_and_lane_adjust(
	struct dc_link *link,
	const struct link_training_settings *link_training_setting,
	union lane_status ln_status[LANE_COUNT_DP_MAX],
	union lane_align_status_updated *ln_align,
	union lane_adjust ln_adjust[LANE_COUNT_DP_MAX],
	uint32_t offset);

enum dc_status dpcd_configure_lttpr_mode(
		struct dc_link *link,
		struct link_training_settings *lt_settings);

enum dc_status configure_lttpr_mode_transparent(struct dc_link *link);

enum dc_status dpcd_configure_channel_coding(
		struct dc_link *link,
		struct link_training_settings *lt_settings);

void repeater_training_done(struct dc_link *link, uint32_t offset);

void start_clock_recovery_pattern_early(struct dc_link *link,
		const struct link_resource *link_res,
		struct link_training_settings *lt_settings,
		uint32_t offset);

void dp_decide_training_settings(
		struct dc_link *link,
		const struct link_resource *link_res,
		const struct dc_link_settings *link_settings,
		struct link_training_settings *lt_settings);

void dp_decide_lane_settings(
	const struct link_training_settings *lt_settings,
	const union lane_adjust ln_adjust[LANE_COUNT_DP_MAX],
	struct dc_lane_settings hw_lane_settings[LANE_COUNT_DP_MAX],
	union dpcd_training_lane *dpcd_lane_settings);

Annotation

Implementation Notes