Release 4.17 drivers/gpu/drm/amd/display/dc/i2caux/engine.h
/*
* Copyright 2012-15 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 __DAL_ENGINE_H__
#define __DAL_ENGINE_H__
enum i2caux_transaction_operation {
I2CAUX_TRANSACTION_READ,
I2CAUX_TRANSACTION_WRITE
};
enum i2caux_transaction_address_space {
I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C = 1,
I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD
};
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
};
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
};
enum i2caux_transaction_action {
I2CAUX_TRANSACTION_ACTION_I2C_WRITE = 0x00,
I2CAUX_TRANSACTION_ACTION_I2C_READ = 0x10,
I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST = 0x20,
I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT = 0x40,
I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT = 0x50,
I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT = 0x60,
I2CAUX_TRANSACTION_ACTION_DP_WRITE = 0x80,
I2CAUX_TRANSACTION_ACTION_DP_READ = 0x90
};
struct engine;
struct engine_funcs {
enum i2caux_engine_type (*get_engine_type)(
const struct engine *engine);
bool (*acquire)(
struct engine *engine,
struct ddc *ddc);
bool (*submit_request)(
struct engine *engine,
struct i2caux_transaction_request *request,
bool middle_of_transaction);
void (*release_engine)(
struct engine *engine);
};
struct engine {
const struct engine_funcs *funcs;
struct ddc *ddc;
struct dc_context *ctx;
};
void dal_i2caux_construct_engine(
struct engine *engine,
struct dc_context *ctx);
void dal_i2caux_destruct_engine(
struct engine *engine);
#endif
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