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ad6756b4d7
[Why] aux_payload should be the struct used inside dc to start aux transactions. This will allow the old aux interface to be seamlessly replaced. [How] Add three fields to aux_payload: reply, mot, defer_delay This will mean that aux_payload has all data required to submit a request. Shift dc_link to use this struct Signed-off-by: David Francis <David.Francis@amd.com> Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
/*
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* Copyright 2012-15 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: AMD
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*
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*/
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#ifndef __DAL_I2CAUX_INTERFACE_H__
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#define __DAL_I2CAUX_INTERFACE_H__
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#include "dc_types.h"
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#include "gpio_service_interface.h"
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#define DEFAULT_AUX_MAX_DATA_SIZE 16
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#define AUX_MAX_DEFER_WRITE_RETRY 20
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struct aux_payload {
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/* set following flag to read/write I2C data,
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* reset it to read/write DPCD data */
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bool i2c_over_aux;
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/* set following flag to write data,
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* reset it to read data */
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bool write;
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bool mot;
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uint32_t address;
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uint8_t length;
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uint8_t *data;
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/*
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* used to return the reply type of the transaction
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* ignored if NULL
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*/
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uint8_t *reply;
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/* expressed in milliseconds
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* zero means "use default value"
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*/
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uint32_t defer_delay;
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};
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struct aux_command {
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struct aux_payload *payloads;
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uint8_t number_of_payloads;
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/* expressed in milliseconds
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* zero means "use default value" */
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uint32_t defer_delay;
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/* zero means "use default value" */
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uint32_t max_defer_write_retry;
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enum i2c_mot_mode mot;
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};
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union aux_config {
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struct {
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uint32_t ALLOW_AUX_WHEN_HPD_LOW:1;
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} bits;
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uint32_t raw;
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};
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struct i2caux;
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struct i2caux *dal_i2caux_create(
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struct dc_context *ctx);
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bool dal_i2caux_submit_i2c_command(
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struct i2caux *i2caux,
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struct ddc *ddc,
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struct i2c_command *cmd);
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bool dal_i2caux_submit_aux_command(
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struct i2caux *i2caux,
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struct ddc *ddc,
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struct aux_command *cmd);
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void dal_i2caux_configure_aux(
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struct i2caux *i2caux,
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struct ddc *ddc,
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union aux_config cfg);
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void dal_i2caux_destroy(
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struct i2caux **ptr);
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#endif
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