b08c3ca4e9
There was lots of return true, and error checking that was never used in these paths. Just remove it all. v2: I missed one return true. Signed-off-by: Dave Airlie <airlied@redhat.com> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
119 lines
3.4 KiB
C
119 lines
3.4 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_AUX_ENGINE_H__
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#define __DAL_AUX_ENGINE_H__
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enum aux_transaction_type {
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AUX_TRANSACTION_TYPE_DP,
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AUX_TRANSACTION_TYPE_I2C
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};
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struct aux_request_transaction_data {
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enum aux_transaction_type type;
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enum i2caux_transaction_action action;
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/* 20-bit AUX channel transaction address */
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uint32_t address;
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/* delay, in 100-microsecond units */
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uint8_t delay;
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uint32_t length;
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uint8_t *data;
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};
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enum aux_transaction_reply {
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AUX_TRANSACTION_REPLY_AUX_ACK = 0x00,
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AUX_TRANSACTION_REPLY_AUX_NACK = 0x01,
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AUX_TRANSACTION_REPLY_AUX_DEFER = 0x02,
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AUX_TRANSACTION_REPLY_I2C_ACK = 0x00,
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AUX_TRANSACTION_REPLY_I2C_NACK = 0x10,
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AUX_TRANSACTION_REPLY_I2C_DEFER = 0x20,
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AUX_TRANSACTION_REPLY_INVALID = 0xFF
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};
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struct aux_reply_transaction_data {
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enum aux_transaction_reply status;
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uint32_t length;
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uint8_t *data;
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};
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enum aux_channel_operation_result {
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AUX_CHANNEL_OPERATION_SUCCEEDED,
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AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN,
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AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY,
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AUX_CHANNEL_OPERATION_FAILED_TIMEOUT
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};
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struct aux_engine;
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struct aux_engine_funcs {
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void (*destroy)(
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struct aux_engine **ptr);
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bool (*acquire_engine)(
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struct aux_engine *engine);
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void (*configure)(
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struct aux_engine *engine,
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union aux_config cfg);
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void (*submit_channel_request)(
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struct aux_engine *engine,
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struct aux_request_transaction_data *request);
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void (*process_channel_reply)(
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struct aux_engine *engine,
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struct aux_reply_transaction_data *reply);
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enum aux_channel_operation_result (*get_channel_status)(
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struct aux_engine *engine,
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uint8_t *returned_bytes);
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bool (*is_engine_available) (
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struct aux_engine *engine);
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};
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struct aux_engine {
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struct engine base;
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const struct aux_engine_funcs *funcs;
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/* following values are expressed in milliseconds */
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uint32_t delay;
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uint32_t max_defer_write_retry;
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bool acquire_reset;
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};
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void dal_aux_engine_construct(
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struct aux_engine *engine,
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struct dc_context *ctx);
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void dal_aux_engine_destruct(
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struct aux_engine *engine);
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bool dal_aux_engine_submit_request(
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struct engine *ptr,
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struct i2caux_transaction_request *request,
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bool middle_of_transaction);
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bool dal_aux_engine_acquire(
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struct engine *ptr,
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struct ddc *ddc);
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enum i2caux_engine_type dal_aux_engine_get_engine_type(
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const struct engine *engine);
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#endif
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