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authorBhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>2019-08-06 17:52:01 -0400
committerAlex Deucher <alexander.deucher@amd.com>2019-10-03 09:10:58 -0500
commit4c283fdac08abf3211533f70623c90a34f41d08d (patch)
tree9f2f8b33e1a5e22258536ed67c611468fc8d3281 /drivers/gpu/drm/amd/display/dc/hdcp
parent143f23053333c266ca89642e3ce7df83023b4793 (diff)
drm/amd/display: Add HDCP module
This module manages HDCP for amdgpu driver. The module behaves as a state machine which handles the different authentication states of HDCP The module is divided into 3 major components +--------+ | Hdcp.c | +--------+ Manages the state machine, sends the events to be executed and communicates with the dm +-----------+ |Execution.c| +-----------+ This executes events based on the current state. Also generates execution results as transition inputs +------------+ |Transition.c| +------------+ Decides the next state based on the input and makes requests to hdcp.c to handle. +-------------+ ------> | Execution.c | ------ | +-------------+ | | V +----+ +--------+ +--------------+ | DM | -----> | Hdcp.c | <------------ | Transition.c | +----+ <----- +--------+ +--------------+ v2: Drop unused function definitions Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com> Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/hdcp')
-rw-r--r--drivers/gpu/drm/amd/display/dc/hdcp/Makefile28
-rw-r--r--drivers/gpu/drm/amd/display/dc/hdcp/hdcp_msg.c326
2 files changed, 354 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/hdcp/Makefile b/drivers/gpu/drm/amd/display/dc/hdcp/Makefile
new file mode 100644
index 000000000000..4170b6eb9ec0
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/hdcp/Makefile
@@ -0,0 +1,28 @@
+# 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.
+#
+# Makefile for the 'hdcp' sub-component of DAL.
+#
+
+HDCP_MSG = hdcp_msg.o
+
+AMD_DAL_HDCP_MSG = $(addprefix $(AMDDALPATH)/dc/hdcp/,$(HDCP_MSG))
+
+AMD_DISPLAY_FILES += $(AMD_DAL_HDCP_MSG)
diff --git a/drivers/gpu/drm/amd/display/dc/hdcp/hdcp_msg.c b/drivers/gpu/drm/amd/display/dc/hdcp/hdcp_msg.c
new file mode 100644
index 000000000000..cf6ef387e5d2
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/hdcp/hdcp_msg.c
@@ -0,0 +1,326 @@
+/*
+ * 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 <linux/slab.h>
+
+#include "dm_services.h"
+#include "dm_helpers.h"
+#include "include/hdcp_types.h"
+#include "include/i2caux_interface.h"
+#include "include/signal_types.h"
+#include "core_types.h"
+#include "dc_link_ddc.h"
+#include "link_hwss.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_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_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
+};
+
+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 = hdcp_i2c_offsets[message_info->msg_id];
+ struct i2c_payload i2c_payloads[] = {
+ { true, 0, 1, &offset },
+ /* actual hdcp payload, will be filled later, zeroed for now*/
+ { 0 }
+ };
+
+ 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);
+
+ if (buff)
+ 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_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)
+{
+ 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
+};
+