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/*
* 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_AUX_ENGINE_DCE110_H__
#define __DAL_AUX_ENGINE_DCE110_H__
#include "i2caux_interface.h"
#include "inc/hw/aux_engine.h"
#define AUX_COMMON_REG_LIST(id)\
SRI(AUX_CONTROL, DP_AUX, id), \
SRI(AUX_ARB_CONTROL, DP_AUX, id), \
SRI(AUX_SW_DATA, DP_AUX, id), \
SRI(AUX_SW_CONTROL, DP_AUX, id), \
SRI(AUX_INTERRUPT_CONTROL, DP_AUX, id), \
SRI(AUX_SW_STATUS, DP_AUX, id), \
SR(AUXN_IMPCAL), \
SR(AUXP_IMPCAL)
struct dce110_aux_registers {
uint32_t AUX_CONTROL;
uint32_t AUX_ARB_CONTROL;
uint32_t AUX_SW_DATA;
uint32_t AUX_SW_CONTROL;
uint32_t AUX_INTERRUPT_CONTROL;
uint32_t AUX_SW_STATUS;
uint32_t AUXN_IMPCAL;
uint32_t AUXP_IMPCAL;
uint32_t AUX_RESET_MASK;
};
enum { /* This is the timeout as defined in DP 1.2a,
* 2.3.4 "Detailed uPacket TX AUX CH State Description".
*/
AUX_TIMEOUT_PERIOD = 400,
/* Ideally, the SW timeout should be just above 550usec
* which is programmed in HW.
* But the SW timeout of 600usec is not reliable,
* because on some systems, delay_in_microseconds()
* returns faster than it should.
* EPR #379763: by trial-and-error on different systems,
* 700usec is the minimum reliable SW timeout for polling
* the AUX_SW_STATUS.AUX_SW_DONE bit.
* This timeout expires *only* when there is
* AUX Error or AUX Timeout conditions - not during normal operation.
* During normal operation, AUX_SW_STATUS.AUX_SW_DONE bit is set
* at most within ~240usec. That means,
* increasing this timeout will not affect normal operation,
* and we'll timeout after
* SW_AUX_TIMEOUT_PERIOD_MULTIPLIER * AUX_TIMEOUT_PERIOD = 2400usec.
* This timeout is especially important for
* converters, resume from S3, and CTS.
*/
SW_AUX_TIMEOUT_PERIOD_MULTIPLIER = 6
};
struct dce_aux {
uint32_t inst;
struct ddc *ddc;
struct dc_context *ctx;
/* following values are expressed in milliseconds */
uint32_t delay;
uint32_t max_defer_write_retry;
bool acquire_reset;
};
struct aux_engine_dce110 {
struct dce_aux base;
const struct dce110_aux_registers *regs;
struct {
uint32_t aux_control;
uint32_t aux_arb_control;
uint32_t aux_sw_data;
uint32_t aux_sw_control;
uint32_t aux_interrupt_control;
uint32_t aux_sw_status;
} addr;
uint32_t timeout_period;
};
struct aux_engine_dce110_init_data {
uint32_t engine_id;
uint32_t timeout_period;
struct dc_context *ctx;
const struct dce110_aux_registers *regs;
};
struct dce_aux *dce110_aux_engine_construct(
struct aux_engine_dce110 *aux_engine110,
struct dc_context *ctx,
uint32_t inst,
uint32_t timeout_period,
const struct dce110_aux_registers *regs);
void dce110_engine_destroy(struct dce_aux **engine);
bool dce110_aux_engine_acquire(
struct dce_aux *aux_engine,
struct ddc *ddc);
int dce_aux_transfer(struct ddc_service *ddc,
struct aux_payload *cmd);
bool dce_aux_transfer_with_retries(struct ddc_service *ddc,
struct aux_payload *cmd);
#endif
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