drivers/gpu/drm/amd/display/dc/inc/hw/aux_engine.h

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

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/display/dc/inc/hw/aux_engine.h
Extension
.h
Size
5096 bytes
Lines
188
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

struct i2caux_transaction_payload {
	enum i2caux_transaction_address_space address_space;
	uint32_t address;
	uint32_t length;
	uint8_t *data;
};

enum i2caux_transaction_status {
	I2CAUX_TRANSACTION_STATUS_UNKNOWN = (-1L),
	I2CAUX_TRANSACTION_STATUS_SUCCEEDED,
	I2CAUX_TRANSACTION_STATUS_FAILED_CHANNEL_BUSY,
	I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT,
	I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR,
	I2CAUX_TRANSACTION_STATUS_FAILED_NACK,
	I2CAUX_TRANSACTION_STATUS_FAILED_INCOMPLETE,
	I2CAUX_TRANSACTION_STATUS_FAILED_OPERATION,
	I2CAUX_TRANSACTION_STATUS_FAILED_INVALID_OPERATION,
	I2CAUX_TRANSACTION_STATUS_FAILED_BUFFER_OVERFLOW,
	I2CAUX_TRANSACTION_STATUS_FAILED_HPD_DISCON
};

struct i2caux_transaction_request {
	enum i2caux_transaction_operation operation;
	struct i2caux_transaction_payload payload;
	enum i2caux_transaction_status status;
};

enum i2caux_engine_type {
	I2CAUX_ENGINE_TYPE_UNKNOWN = (-1L),
	I2CAUX_ENGINE_TYPE_AUX,
	I2CAUX_ENGINE_TYPE_I2C_DDC_HW,
	I2CAUX_ENGINE_TYPE_I2C_GENERIC_HW,
	I2CAUX_ENGINE_TYPE_I2C_SW
};

enum i2c_default_speed {
	I2CAUX_DEFAULT_I2C_HW_SPEED = 50,
	I2CAUX_DEFAULT_I2C_SW_SPEED = 50
};

union aux_config {
	struct {
		uint32_t ALLOW_AUX_WHEN_HPD_LOW:1;
	} bits;
	uint32_t raw;
};

struct aux_engine {
	uint32_t inst;
	struct ddc *ddc;
	struct dc_context *ctx;
	const struct aux_engine_funcs *funcs;
	/* following values are expressed in milliseconds */
	uint32_t delay;
	uint32_t max_defer_write_retry;
	bool acquire_reset;
};

struct read_command_context {
	uint8_t *buffer;
	uint32_t current_read_length;
	uint32_t offset;
	enum i2caux_transaction_status status;

	struct aux_request_transaction_data request;
	struct aux_reply_transaction_data reply;

	uint8_t returned_byte;

	uint32_t timed_out_retry_aux;
	uint32_t invalid_reply_retry_aux;
	uint32_t defer_retry_aux;
	uint32_t defer_retry_i2c;
	uint32_t invalid_reply_retry_aux_on_ack;

	bool transaction_complete;
	bool operation_succeeded;
};

struct write_command_context {
	bool mot;

	uint8_t *buffer;
	uint32_t current_write_length;
	enum i2caux_transaction_status status;

	struct aux_request_transaction_data request;
	struct aux_reply_transaction_data reply;

	uint8_t returned_byte;

Annotation

Implementation Notes