linux/drivers/gpu/drm/amd/display/dc/hdcp/hdcp_msg.c

/*
 * Copyright 2019 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
 *
 */

#include "dm_services.h"
#include "dm_helpers.h"
#include "include/hdcp_msg_types.h"
#include "include/signal_types.h"
#include "core_types.h"
#include "link.h"
#include "link_hwss.h"
#include "link/protocols/link_dpcd.h"

#define DC_LOGGER …
#define HDCP14_KSV_SIZE …
#define HDCP14_MAX_KSV_FIFO_SIZE …

static const bool hdcp_cmd_is_read[HDCP_MESSAGE_ID_MAX] = …;

static const uint8_t hdcp_i2c_offsets[HDCP_MESSAGE_ID_MAX] = …;

struct protection_properties { … };

static const struct protection_properties non_supported_protection = …;

static bool hdmi_14_process_transaction(
	struct dc_link *link,
	struct hdcp_protection_message *message_info)
{ … }

static const struct protection_properties hdmi_14_protection = …;

static const uint32_t hdcp_dpcd_addrs[HDCP_MESSAGE_ID_MAX] = …;

static bool dpcd_access_helper(
	struct dc_link *link,
	uint32_t length,
	uint8_t *data,
	uint32_t dpcd_addr,
	bool is_read)
{ … }

static bool dp_11_process_transaction(
	struct dc_link *link,
	struct hdcp_protection_message *message_info)
{ … }

static const struct protection_properties dp_11_protection = …;

static const struct protection_properties *get_protection_properties_by_signal(
	struct dc_link *link,
	enum signal_type st,
	enum hdcp_version version)
{ … }

enum hdcp_message_status dc_process_hdcp_msg(
	enum signal_type signal,
	struct dc_link *link,
	struct hdcp_protection_message *message_info)
{ … }