/*
* Copyright 2022 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
*
*/
/* FILE POLICY AND INTENDED USAGE:
* This file manages link detection states and receiver states by using various
* link protocols. It also provides helper functions to interpret certain
* capabilities or status based on the states it manages or retrieve them
* directly from connected receivers.
*/
#include "link_dpms.h"
#include "link_detection.h"
#include "link_hwss.h"
#include "protocols/link_edp_panel_control.h"
#include "protocols/link_ddc.h"
#include "protocols/link_hpd.h"
#include "protocols/link_dpcd.h"
#include "protocols/link_dp_capability.h"
#include "protocols/link_dp_dpia.h"
#include "protocols/link_dp_phy.h"
#include "protocols/link_dp_training.h"
#include "protocols/link_dp_dpia_bw.h"
#include "accessories/link_dp_trace.h"
#include "link_enc_cfg.h"
#include "dm_helpers.h"
#include "clk_mgr.h"
#define DC_LOGGER \
link->ctx->logger
#define DC_LOGGER_INIT(logger)
#define LINK_INFO(...) \
DC_LOG_HW_HOTPLUG( \
__VA_ARGS__)
/*
* Some receivers fail to train on first try and are good
* on subsequent tries. 2 retries should be plenty. If we
* don't have a successful training then we don't expect to
* ever get one.
*/
#define LINK_TRAINING_MAX_VERIFY_RETRY 2
static const u8 DP_SINK_BRANCH_DEV_NAME_7580[] = "7580\x80u";
static const u8 dp_hdmi_dongle_signature_str[] = "DP-HDMI ADAPTOR";
static enum ddc_transaction_type get_ddc_transaction_type(enum
