drivers/gpu/drm/amd/display/dc/dm_helpers.h

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

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/display/dc/dm_helpers.h
Extension
.h
Size
6760 bytes
Lines
242
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 __DM_HELPERS__
#define __DM_HELPERS__

#include "modules/inc/mod_info_packet_types.h"
#include "dc_types.h"
#include "dc.h"

struct dc_dp_mst_stream_allocation_table;
struct aux_payload;
enum aux_return_code_type;
enum set_config_status;

/*
 * Allocate memory accessible by the GPU
 *
 * frame buffer allocations must be aligned to a 4096-byte boundary
 *
 * Returns virtual address, sets addr to physical address
 */
void *dm_helpers_allocate_gpu_mem(
		struct dc_context *ctx,
		enum dc_gpu_mem_alloc_type type,
		size_t size,
		long long *addr);

/*
 * Free the GPU-accessible memory at the virtual address pvMem
 */
void dm_helpers_free_gpu_mem(
		struct dc_context *ctx,
		enum dc_gpu_mem_alloc_type type,
		void *pvMem);

enum dc_edid_status dm_helpers_parse_edid_caps(
	struct dc_link *link,
	const struct dc_edid *edid,
	struct dc_edid_caps *edid_caps);


/*
 * Update DP branch info
 */
void dm_helpers_dp_update_branch_info(
		struct dc_context *ctx,
		const struct dc_link *link);

/*
 * Writes payload allocation table in immediate downstream device.
 */
bool dm_helpers_dp_mst_write_payload_allocation_table(
		struct dc_context *ctx,
		const struct dc_stream_state *stream,
		struct dc_dp_mst_stream_allocation_table *proposed_table,
		bool enable);

/*
 * poll pending down reply
 */
void dm_helpers_dp_mst_poll_pending_down_reply(
	struct dc_context *ctx,
	const struct dc_link *link);

/*
 * Clear payload allocation table before enable MST DP link.
 */
void dm_helpers_dp_mst_clear_payload_allocation_table(
	struct dc_context *ctx,
	const struct dc_link *link);

/*
 * Polls for ACT (allocation change trigger) handled and
 */
enum act_return_status dm_helpers_dp_mst_poll_for_allocation_change_trigger(
		struct dc_context *ctx,
		const struct dc_stream_state *stream);
/*
 * Sends ALLOCATE_PAYLOAD message.
 */
void dm_helpers_dp_mst_send_payload_allocation(
		struct dc_context *ctx,
		const struct dc_stream_state *stream);

/*
 * Update mst manager relevant variables
 */
void dm_helpers_dp_mst_update_mst_mgr_for_deallocation(
		struct dc_context *ctx,
		const struct dc_stream_state *stream);

bool dm_helpers_dp_mst_start_top_mgr(

Annotation

Implementation Notes