/*
* 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 \
link->ctx->logger
#define HDCP14_KSV_SIZE 5
#define HDCP14_MAX_KSV_FIFO_SIZE 127*HDCP14_KSV_SIZE
static const bool hdcp_cmd_is_read[HDCP_MESSAGE_ID_MAX] = {
[HDCP_MESSAGE_ID_READ_BKSV] = true,
[HDCP_MESSAGE_ID_READ_RI_R0] = true,
[HDCP_MESSAGE_ID_READ_PJ] = true,
[HDCP_MESSAGE_ID_WRITE_AKSV] = false,
[HDCP_MESSAGE_ID_WRITE_AINFO] = false,
[HDCP_MESSAGE_ID_WRITE_AN] = false,
[HDCP_MESSAGE_ID_READ_VH_X] = true,
[HDCP_MESSAGE_ID_READ_VH_0] = true,
[HDCP_MESSAGE_ID_READ_VH_1] = true,
[HDCP_MESSAGE_ID_READ_VH_2] = true,
[HDCP_MESSAGE_ID_READ_VH_3] = true,
[HDCP_MESSAGE_ID_READ_VH_4] = true,
[HDCP_MESSAGE_ID_READ_BCAPS] = true,
[HDCP_MESSAGE_ID_READ_BSTATUS] = true,
[HDCP_MESSAGE_ID_READ_KSV_FIFO] = true,
[HDCP_MESSAGE_ID_READ_BINFO] = true,
[HDCP_MESSAGE_ID_HDCP2VERSION] = true,
[HDCP_MESSAGE_ID_RX_CAPS] = true,
[HDCP_MESSAGE_ID_WRITE_AKE_INIT] = false,
[HDCP_MESSAGE_ID_READ_AKE_SEND_CERT] = true,
[HDCP_MESSAGE_ID_WRITE_AKE_NO_STORED_KM] = false,
[HDCP_MESSAGE_ID_WRITE_AKE_STORED_KM] = false,
[HDCP_MESSAGE_ID_READ_AKE_SEND_H_PRIME] = true,
[HDCP_MESSAGE_ID_READ_AKE_SEND_PAIRING_INFO] = true,
[HDCP_MESSAGE_ID_WRITE_LC_INIT] = false,
[HDCP_MESSAGE_ID_READ_LC_SEND_L_PRIME] = true,
[HDCP_MESSAGE_ID_WRITE_SKE_SEND_EKS] = false,
[HDCP_MESSAGE_ID_READ_REPEATER_AUTH_SEND_RECEIVERID_LIST] = true,
[HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_SEND_ACK] = false,
[HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_STREAM_MANAGE] = false,
[HDCP_MESSAGE_ID_READ_REPEATER_AUTH_STREAM_READY] = true,
[HDCP_MESSAGE_ID_READ_RXSTATUS] = true,
[HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE] = false,
};
static const uint8_t hdcp_i2c_offsets[HDCP_MESSAGE_ID_MAX] = {
[HDCP_MESSAGE_ID_READ_BKSV] = 0x0,
[HDCP_MESSAGE_ID_READ_RI_R0] = 0x8,
[HDCP_MESSAGE_ID_READ_PJ] = 0xA,
[HDCP_MESSAGE_ID_WRITE_AKSV] = 0x10,
[HDCP_MESSAGE_ID_WRITE_AINFO] = 0x15,
[HDCP_MESSAGE_ID_WRITE_AN] = 0x18,
[HDCP_MESSAGE_ID_READ_VH_X] = 0x20,
[HDCP_MESSAGE_ID_READ_VH_0] = 0x20,
[HDCP_MESSAGE_ID_READ_VH_1] = 0x24,
[HDCP_MESSAGE_ID_READ_VH_2] = 0x28,
[HDCP_MESSAGE_ID_READ_VH_3] = 0x2C,
[HDCP_MESSAGE_ID_READ_VH_4] = 0x30,
[HDCP_MESSAGE_ID_READ_BCAPS] = 0x40,
[HDCP_MESSAGE_ID_READ_BSTATUS] = 0x41,
[HDCP_MESSAGE_ID_READ_KSV_FIFO] = 0x43,
[HDCP_MESSAGE_ID_READ_BINFO] = 0xFF,
[HDCP_MESSAGE_ID_HDCP2VERSION] = 0x50,
[HDCP_MESSAGE_ID_WRITE_AKE_INIT] = 0x60,
[HDCP_MESSAGE_ID_READ_AKE_SEND_CERT] = 0x80,
[HDCP_MESSAGE_ID_WRITE_AKE_NO_STORED_KM] = 0x60,
[HDCP_MESSAGE_ID_WRITE_AKE_STORED_KM] = 0x60,
[HDCP_MESSAGE_ID_READ_AKE_SEND_H_PRIME] = 0x80,
[HDCP_MESSAGE_ID_READ_AKE_SEND_PAIRING_INFO] = 0x80,
[HDCP_MESSAGE_ID_WRITE_LC_INIT] = 0x60,
[HDCP_MESSAGE_ID_READ_LC_SEND_L_PRIME] = 0x80,
[HDCP_MESSAGE_ID_WRITE_SKE_SEND_EKS] = 0x60,
[HDCP_MESSAGE_ID_READ_REPEATER_AUTH_SEND_RECEIVERID_LIST] = 0x80,
[HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_SEND_ACK] = 0x60,
[HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_STREAM_MANAGE] = 0x60,
[HDCP_MESSAGE_ID_READ_REPEATER_AUTH_STREAM_READY] = 0x80,
[HDCP_MESSAGE_ID_READ_RXSTATUS] = 0x70,
[HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE] = 0x0,
};
struct protection_properties {
bool supported;
bool (*process_transaction)(
struct dc_link *link,
struct hdcp_protection_message *message_info);
};
static const struct protection_properties non_supported_protection = {
.supported = false
};
static bool hdmi_14_process_transaction(
struct dc_link *link,
struct hdcp_protection_message *message_info)
{
uint8_t *buff = NULL;
bool result;
const uint8_t hdcp_i2c_addr_link_primary = 0x3a; /* 0x74 >> 1*/
const uint8_t hdcp_i2c_addr_link_secondary = 0x3b; /* 0x76 >> 1*/
struct i2c_command i2c_command;
uint8_t offset;
struct i2c_payload i2c_payloads[] = {
{ true, 0, 1, 0 },
/* actual hdcp payload, will be filled later, zeroed for now*/
{ 0 }
};
if (message_info->msg_id == HDCP_MESSAGE_ID_INVALID) {
DC_LOG_ERROR("%s: Invalid message_info msg_id - %d\n", __func__, message_info->msg_id);
return false;
}
offset = hdcp_i2c_offsets[message_info->msg_id];
i2c_payloads[0].data = &offset;
switch (message_info->link) {
case HDCP_LINK_SECONDARY:
i2c_payloads[0].address = hdcp_i2c_addr_link_secondary;
i2c_payloads[1].address = hdcp_i2c_addr_link_secondary;
break;
case HDCP_LINK_PRIMARY:
default:
i2c_payloads[0].address = hdcp_i2c_addr_link_primary;
i2c_payloads[1].address = hdcp_i2c_addr_link_primary;
break;
}
if (hdcp_cmd_is_read[message_info->msg_id]) {
i2c_payloads[1].write = false;
i2c_command.number_of_payloads = ARRAY_SIZE(i2c_payloads);
i2c_payloads[1].length = message_info->length;
i2c_payloads[1].data = message_info->data;
} else {
i2c_command.number_of_payloads = 1;
buff = kzalloc(message_info->length + 1, GFP_KERNEL);
if (!buff)
return false;
buff[0] = offset;
memmove(&buff[1], message_info->data, message_info->length);
i2c_payloads[0].length = message_info->length + 1;
i2c_payloads[0].data = buff;
}
i2c_command.payloads = i2c_payloads;
i2c_command.engine = I2C_COMMAND_ENGINE_HW;//only HW
i2c_command.speed = link->ddc->ctx->dc->caps.i2c_speed_in_khz;
result = dm_helpers_submit_i2c(
link->ctx,
link,
&i2c_command);
kfree(buff);
return result;
}
static const struct protection_properties hdmi_14_protection = {
.supported = true,
.process_transaction = hdmi_14_process_transaction
};
static const uint32_t hdcp_dpcd_addrs[HDCP_MESSAGE_ID_MAX] = {
[HDCP_MESSAGE_ID_READ_BKSV] = 0x68000,
[HDCP_MESSAGE_ID_READ_RI_R0] = 0x68005,
[HDCP_MESSAGE_ID_READ_PJ] = 0xFFFFFFFF,
[HDCP_MESSAGE_ID_WRITE_AKSV] = 0x68007,
[HDCP_MESSAGE_ID_WRITE_AINFO] = 0x6803B,
[HDCP_MESSAGE_ID_WRITE_AN] = 0x6800c,
[HDCP_MESSAGE_ID_READ_VH_X] = 0x68014,
[HDCP_MESSAGE_ID_READ_VH_0] = 0x68014,
[HDCP_MESSAGE_ID_READ_VH_1] = 0x68018,
[HDCP_MESSAGE_ID_READ_VH_2] = 0x6801c,
[HDCP_MESSAGE_ID_READ_VH_3] = 0x68020,
[HDCP_MESSAGE_ID_READ_VH_4] = 0x68024,
[HDCP_MESSAGE_ID_READ_BCAPS] = 0x68028,
[HDCP_MESSAGE_ID_READ_BSTATUS] = 0x68029,
[HDCP_MESSAGE_ID_READ_KSV_FIFO] = 0x6802c,
[HDCP_MESSAGE_ID_READ_BINFO] = 0x6802a,
[HDCP_MESSAGE_ID_RX_CAPS] = 0x6921d,
[HDCP_MESSAGE_ID_WRITE_AKE_INIT] = 0x69000,
[HDCP_MESSAGE_ID_READ_AKE_SEND_CERT] = 0x6900b,
[HDCP_MESSAGE_ID_WRITE_AKE_NO_STORED_KM] = 0x69220,
[HDCP_MESSAGE_ID_WRITE_AKE_STORED_KM] = 0x692a0,
[HDCP_MESSAGE_ID_READ_AKE_SEND_H_PRIME] = 0x692c0,
[HDCP_MESSAGE_ID_READ_AKE_SEND_PAIRING_INFO] = 0x692e0,
[HDCP_MESSAGE_ID_WRITE_LC_INIT] = 0x692f0,
[HDCP_MESSAGE_ID_READ_LC_SEND_L_PRIME] = 0x692f8,
[HDCP_MESSAGE_ID_WRITE_SKE_SEND_EKS] = 0x69318,
[HDCP_MESSAGE_ID_READ_REPEATER_AUTH_SEND_RECEIVERID_LIST] = 0x69330,
[HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_SEND_ACK] = 0x693e0,
[HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_STREAM_MANAGE] = 0x693f0,
[HDCP_MESSAGE_ID_READ_REPEATER_AUTH_STREAM_READY] = 0x69473,
[HDCP_MESSAGE_ID_READ_RXSTATUS] = 0x69493,
[HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE] = 0x69494
};
static bool dpcd_access_helper(
struct dc_link *link,
uint32_t length,
uint8_t *data,
uint32_t dpcd_addr,
bool is_read)
{
enum dc_status status;
uint32_t cur_length = 0;
uint32_t offset = 0;
uint32_t ksv_read_size = 0x6803b - 0x6802c;
/* Read KSV, need repeatedly handle */
if (dpcd_addr == 0x6802c) {
if (length % HDCP14_KSV_SIZE) {
DC_LOG_ERROR("%s: KsvFifo Size(%d) is not a multiple of HDCP14_KSV_SIZE(%d)\n",
__func__,
length,
HDCP14_KSV_SIZE);
}
if (length > HDCP14_MAX_KSV_FIFO_SIZE) {
DC_LOG_ERROR("%s: KsvFifo Size(%d) is greater than HDCP14_MAX_KSV_FIFO_SIZE(%d)\n",
__func__,
length,
HDCP14_MAX_KSV_FIFO_SIZE);
}
DC_LOG_ERROR("%s: Reading %d Ksv(s) from KsvFifo\n",
__func__,
length / HDCP14_KSV_SIZE);
while (length > 0) {
if (length > ksv_read_size) {
status = core_link_read_dpcd(
link,
dpcd_addr + offset,
data + offset,
ksv_read_size);
data += ksv_read_size;
length -= ksv_read_size;
} else {
status = core_link_read_dpcd(
link,
dpcd_addr + offset,
data + offset,
length);
data += length;
length = 0;
}
if (status != DC_OK)
return false;
}
} else {
while (length > 0) {
if (length > DEFAULT_AUX_MAX_DATA_SIZE)
cur_length = DEFAULT_AUX_MAX_DATA_SIZE;
else
cur_length = length;
if (is_read) {
status = core_link_read_dpcd(
link,
dpcd_addr + offset,
data + offset,
cur_length);
} else {
status = core_link_write_dpcd(
link,
dpcd_addr + offset,
data + offset,
cur_length);
}
if (status != DC_OK)
return false;
length -= cur_length;
offset += cur_length;
}
}
return true;
}
static bool dp_11_process_transaction(
struct dc_link *link,
struct hdcp_protection_message *message_info)
{
if (message_info->msg_id == HDCP_MESSAGE_ID_INVALID) {
DC_LOG_ERROR("%s: Invalid message_info msg_id - %d\n", __func__, message_info->msg_id);
return false;
}
return dpcd_access_helper(
link,
message_info->length,
message_info->data,
hdcp_dpcd_addrs[message_info->msg_id],
hdcp_cmd_is_read[message_info->msg_id]);
}
static const struct protection_properties dp_11_protection = {
.supported = true,
.process_transaction = dp_11_process_transaction
};
static const struct protection_properties *get_protection_properties_by_signal(
struct dc_link *link,
enum signal_type st,
enum hdcp_version version)
{
switch (version) {
case HDCP_VERSION_14:
switch (st) {
case SIGNAL_TYPE_DVI_SINGLE_LINK:
case SIGNAL_TYPE_DVI_DUAL_LINK:
case SIGNAL_TYPE_HDMI_TYPE_A:
return &hdmi_14_protection;
case SIGNAL_TYPE_DISPLAY_PORT:
if (link &&
(link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER ||
link->dpcd_caps.dongle_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER)) {
return &non_supported_protection;
}
return &dp_11_protection;
case SIGNAL_TYPE_DISPLAY_PORT_MST:
case SIGNAL_TYPE_EDP:
return &dp_11_protection;
default:
return &non_supported_protection;
}
break;
case HDCP_VERSION_22:
switch (st) {
case SIGNAL_TYPE_DVI_SINGLE_LINK:
case SIGNAL_TYPE_DVI_DUAL_LINK:
case SIGNAL_TYPE_HDMI_TYPE_A:
return &hdmi_14_protection; //todo version2.2
case SIGNAL_TYPE_DISPLAY_PORT:
case SIGNAL_TYPE_DISPLAY_PORT_MST:
case SIGNAL_TYPE_EDP:
return &dp_11_protection; //todo version2.2
default:
return &non_supported_protection;
}
break;
default:
return &non_supported_protection;
}
}
enum hdcp_message_status dc_process_hdcp_msg(
enum signal_type signal,
struct dc_link *link,
struct hdcp_protection_message *message_info)
{
enum hdcp_message_status status = HDCP_MESSAGE_FAILURE;
uint32_t i = 0;
const struct protection_properties *protection_props;
if (!message_info)
return HDCP_MESSAGE_UNSUPPORTED;
if (message_info->msg_id < HDCP_MESSAGE_ID_READ_BKSV ||
message_info->msg_id >= HDCP_MESSAGE_ID_MAX)
return HDCP_MESSAGE_UNSUPPORTED;
protection_props =
get_protection_properties_by_signal(
link,
signal,
message_info->version);
if (!protection_props->supported)
return HDCP_MESSAGE_UNSUPPORTED;
if (protection_props->process_transaction(
link,
message_info)) {
status = HDCP_MESSAGE_SUCCESS;
} else {
for (i = 0; i < message_info->max_retries; i++) {
if (protection_props->process_transaction(
link,
message_info)) {
status = HDCP_MESSAGE_SUCCESS;
break;
}
}
}
return status;
}
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