/* * 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_I2CAUX_INTERFACE_H__ #define __DAL_I2CAUX_INTERFACE_H__ #include "dc_types.h" #include "gpio_service_interface.h" #define DEFAULT_AUX_MAX_DATA_SIZE 16 #define AUX_MAX_DEFER_WRITE_RETRY 20 struct aux_payload { /* set following flag to read/write I2C data, * reset it to read/write DPCD data */ bool i2c_over_aux; /* set following flag to write data, * reset it to read data */ bool write; uint32_t address; uint8_t length; uint8_t *data; }; struct aux_command { struct aux_payload *payloads; uint8_t number_of_payloads; /* expressed in milliseconds * zero means "use default value" */ uint32_t defer_delay; /* zero means "use default value" */ uint32_t max_defer_write_retry; enum i2c_mot_mode mot; }; union aux_config { struct { uint32_t ALLOW_AUX_WHEN_HPD_LOW:1; } bits; uint32_t raw; }; struct i2caux; struct i2caux *dal_i2caux_create( struct dc_context *ctx); bool dal_i2caux_submit_i2c_command( struct i2caux *i2caux, struct ddc *ddc, struct i2c_command *cmd); bool dal_i2caux_submit_aux_command( struct i2caux *i2caux, struct ddc *ddc, struct aux_command *cmd); void dal_i2caux_configure_aux( struct i2caux *i2caux, struct ddc *ddc, union aux_config cfg); void dal_i2caux_destroy( struct i2caux **ptr); #endif