/*
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* Copyright 2019 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: AMD
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*
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*/
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#include "amdgpu_dm_hdcp.h"
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#include "amdgpu.h"
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#include "amdgpu_dm.h"
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#include "dm_helpers.h"
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#include <drm/drm_hdcp.h>
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#include "hdcp_psp.h"
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/*
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* If the SRM version being loaded is less than or equal to the
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* currently loaded SRM, psp will return 0xFFFF as the version
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*/
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#define PSP_SRM_VERSION_MAX 0xFFFF
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static bool
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lp_write_i2c(void *handle, uint32_t address, const uint8_t *data, uint32_t size)
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{
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struct dc_link *link = handle;
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struct i2c_payload i2c_payloads[] = {{true, address, size, (void *)data} };
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struct i2c_command cmd = {i2c_payloads, 1, I2C_COMMAND_ENGINE_HW, link->dc->caps.i2c_speed_in_khz};
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return dm_helpers_submit_i2c(link->ctx, link, &cmd);
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}
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static bool
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lp_read_i2c(void *handle, uint32_t address, uint8_t offset, uint8_t *data, uint32_t size)
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{
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struct dc_link *link = handle;
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struct i2c_payload i2c_payloads[] = {{true, address, 1, &offset}, {false, address, size, data} };
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struct i2c_command cmd = {i2c_payloads, 2, I2C_COMMAND_ENGINE_HW, link->dc->caps.i2c_speed_in_khz};
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return dm_helpers_submit_i2c(link->ctx, link, &cmd);
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}
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static bool
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lp_write_dpcd(void *handle, uint32_t address, const uint8_t *data, uint32_t size)
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{
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struct dc_link *link = handle;
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return dm_helpers_dp_write_dpcd(link->ctx, link, address, data, size);
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}
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static bool
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lp_read_dpcd(void *handle, uint32_t address, uint8_t *data, uint32_t size)
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{
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struct dc_link *link = handle;
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return dm_helpers_dp_read_dpcd(link->ctx, link, address, data, size);
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}
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static uint8_t *psp_get_srm(struct psp_context *psp, uint32_t *srm_version, uint32_t *srm_size)
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{
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struct ta_hdcp_shared_memory *hdcp_cmd;
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if (!psp->hdcp_context.hdcp_initialized) {
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DRM_WARN("Failed to get hdcp srm. HDCP TA is not initialized.");
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return NULL;
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}
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hdcp_cmd = (struct ta_hdcp_shared_memory *)psp->hdcp_context.hdcp_shared_buf;
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memset(hdcp_cmd, 0, sizeof(struct ta_hdcp_shared_memory));
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hdcp_cmd->cmd_id = TA_HDCP_COMMAND__HDCP_GET_SRM;
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psp_hdcp_invoke(psp, hdcp_cmd->cmd_id);
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if (hdcp_cmd->hdcp_status != TA_HDCP_STATUS__SUCCESS)
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return NULL;
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*srm_version = hdcp_cmd->out_msg.hdcp_get_srm.srm_version;
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*srm_size = hdcp_cmd->out_msg.hdcp_get_srm.srm_buf_size;
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return hdcp_cmd->out_msg.hdcp_get_srm.srm_buf;
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}
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static int psp_set_srm(struct psp_context *psp, uint8_t *srm, uint32_t srm_size, uint32_t *srm_version)
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{
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struct ta_hdcp_shared_memory *hdcp_cmd;
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if (!psp->hdcp_context.hdcp_initialized) {
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DRM_WARN("Failed to get hdcp srm. HDCP TA is not initialized.");
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return -EINVAL;
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}
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hdcp_cmd = (struct ta_hdcp_shared_memory *)psp->hdcp_context.hdcp_shared_buf;
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memset(hdcp_cmd, 0, sizeof(struct ta_hdcp_shared_memory));
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memcpy(hdcp_cmd->in_msg.hdcp_set_srm.srm_buf, srm, srm_size);
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hdcp_cmd->in_msg.hdcp_set_srm.srm_buf_size = srm_size;
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hdcp_cmd->cmd_id = TA_HDCP_COMMAND__HDCP_SET_SRM;
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psp_hdcp_invoke(psp, hdcp_cmd->cmd_id);
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if (hdcp_cmd->hdcp_status != TA_HDCP_STATUS__SUCCESS || hdcp_cmd->out_msg.hdcp_set_srm.valid_signature != 1 ||
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hdcp_cmd->out_msg.hdcp_set_srm.srm_version == PSP_SRM_VERSION_MAX)
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return -EINVAL;
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*srm_version = hdcp_cmd->out_msg.hdcp_set_srm.srm_version;
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return 0;
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}
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static void process_output(struct hdcp_workqueue *hdcp_work)
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{
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struct mod_hdcp_output output = hdcp_work->output;
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if (output.callback_stop)
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cancel_delayed_work(&hdcp_work->callback_dwork);
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if (output.callback_needed)
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schedule_delayed_work(&hdcp_work->callback_dwork,
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msecs_to_jiffies(output.callback_delay));
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if (output.watchdog_timer_stop)
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cancel_delayed_work(&hdcp_work->watchdog_timer_dwork);
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if (output.watchdog_timer_needed)
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schedule_delayed_work(&hdcp_work->watchdog_timer_dwork,
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msecs_to_jiffies(output.watchdog_timer_delay));
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schedule_delayed_work(&hdcp_work->property_validate_dwork, msecs_to_jiffies(0));
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}
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static void link_lock(struct hdcp_workqueue *work, bool lock)
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{
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int i = 0;
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for (i = 0; i < work->max_link; i++) {
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if (lock)
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mutex_lock(&work[i].mutex);
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else
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mutex_unlock(&work[i].mutex);
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}
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}
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void hdcp_update_display(struct hdcp_workqueue *hdcp_work,
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unsigned int link_index,
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struct amdgpu_dm_connector *aconnector,
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uint8_t content_type,
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bool enable_encryption)
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{
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struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index];
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struct mod_hdcp_display *display = &hdcp_work[link_index].display;
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struct mod_hdcp_link *link = &hdcp_work[link_index].link;
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struct mod_hdcp_display_query query;
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mutex_lock(&hdcp_w->mutex);
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hdcp_w->aconnector = aconnector;
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query.display = NULL;
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mod_hdcp_query_display(&hdcp_w->hdcp, aconnector->base.index, &query);
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if (query.display != NULL) {
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memcpy(display, query.display, sizeof(struct mod_hdcp_display));
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mod_hdcp_remove_display(&hdcp_w->hdcp, aconnector->base.index, &hdcp_w->output);
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hdcp_w->link.adjust.hdcp2.force_type = MOD_HDCP_FORCE_TYPE_0;
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if (enable_encryption) {
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/* Explicitly set the saved SRM as sysfs call will be after we already enabled hdcp
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* (s3 resume case)
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*/
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if (hdcp_work->srm_size > 0)
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psp_set_srm(hdcp_work->hdcp.config.psp.handle, hdcp_work->srm, hdcp_work->srm_size,
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&hdcp_work->srm_version);
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display->adjust.disable = 0;
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if (content_type == DRM_MODE_HDCP_CONTENT_TYPE0) {
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hdcp_w->link.adjust.hdcp1.disable = 0;
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hdcp_w->link.adjust.hdcp2.force_type = MOD_HDCP_FORCE_TYPE_0;
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} else if (content_type == DRM_MODE_HDCP_CONTENT_TYPE1) {
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hdcp_w->link.adjust.hdcp1.disable = 1;
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hdcp_w->link.adjust.hdcp2.force_type = MOD_HDCP_FORCE_TYPE_1;
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}
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schedule_delayed_work(&hdcp_w->property_validate_dwork,
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msecs_to_jiffies(DRM_HDCP_CHECK_PERIOD_MS));
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} else {
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display->adjust.disable = 1;
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hdcp_w->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
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cancel_delayed_work(&hdcp_w->property_validate_dwork);
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}
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display->state = MOD_HDCP_DISPLAY_ACTIVE;
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}
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mod_hdcp_add_display(&hdcp_w->hdcp, link, display, &hdcp_w->output);
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process_output(hdcp_w);
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mutex_unlock(&hdcp_w->mutex);
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}
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static void hdcp_remove_display(struct hdcp_workqueue *hdcp_work,
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unsigned int link_index,
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struct amdgpu_dm_connector *aconnector)
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{
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struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index];
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mutex_lock(&hdcp_w->mutex);
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hdcp_w->aconnector = aconnector;
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mod_hdcp_remove_display(&hdcp_w->hdcp, aconnector->base.index, &hdcp_w->output);
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process_output(hdcp_w);
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mutex_unlock(&hdcp_w->mutex);
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}
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void hdcp_reset_display(struct hdcp_workqueue *hdcp_work, unsigned int link_index)
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{
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struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index];
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mutex_lock(&hdcp_w->mutex);
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mod_hdcp_reset_connection(&hdcp_w->hdcp, &hdcp_w->output);
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cancel_delayed_work(&hdcp_w->property_validate_dwork);
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hdcp_w->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
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process_output(hdcp_w);
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mutex_unlock(&hdcp_w->mutex);
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}
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void hdcp_handle_cpirq(struct hdcp_workqueue *hdcp_work, unsigned int link_index)
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{
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struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index];
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schedule_work(&hdcp_w->cpirq_work);
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}
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static void event_callback(struct work_struct *work)
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{
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struct hdcp_workqueue *hdcp_work;
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hdcp_work = container_of(to_delayed_work(work), struct hdcp_workqueue,
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callback_dwork);
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mutex_lock(&hdcp_work->mutex);
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cancel_delayed_work(&hdcp_work->callback_dwork);
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mod_hdcp_process_event(&hdcp_work->hdcp, MOD_HDCP_EVENT_CALLBACK,
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&hdcp_work->output);
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process_output(hdcp_work);
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mutex_unlock(&hdcp_work->mutex);
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}
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static void event_property_update(struct work_struct *work)
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{
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struct hdcp_workqueue *hdcp_work = container_of(work, struct hdcp_workqueue, property_update_work);
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struct amdgpu_dm_connector *aconnector = hdcp_work->aconnector;
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struct drm_device *dev = hdcp_work->aconnector->base.dev;
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long ret;
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drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
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mutex_lock(&hdcp_work->mutex);
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if (aconnector->base.state->commit) {
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ret = wait_for_completion_interruptible_timeout(&aconnector->base.state->commit->hw_done, 10 * HZ);
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if (ret == 0) {
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DRM_ERROR("HDCP state unknown! Setting it to DESIRED");
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hdcp_work->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
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}
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}
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if (hdcp_work->encryption_status != MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF) {
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if (aconnector->base.state->hdcp_content_type == DRM_MODE_HDCP_CONTENT_TYPE0 &&
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hdcp_work->encryption_status <= MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE0_ON)
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drm_hdcp_update_content_protection(&aconnector->base, DRM_MODE_CONTENT_PROTECTION_ENABLED);
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else if (aconnector->base.state->hdcp_content_type == DRM_MODE_HDCP_CONTENT_TYPE1 &&
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hdcp_work->encryption_status == MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE1_ON)
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drm_hdcp_update_content_protection(&aconnector->base, DRM_MODE_CONTENT_PROTECTION_ENABLED);
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} else {
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drm_hdcp_update_content_protection(&aconnector->base, DRM_MODE_CONTENT_PROTECTION_DESIRED);
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}
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mutex_unlock(&hdcp_work->mutex);
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drm_modeset_unlock(&dev->mode_config.connection_mutex);
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}
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static void event_property_validate(struct work_struct *work)
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{
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struct hdcp_workqueue *hdcp_work =
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container_of(to_delayed_work(work), struct hdcp_workqueue, property_validate_dwork);
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struct mod_hdcp_display_query query;
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struct amdgpu_dm_connector *aconnector = hdcp_work->aconnector;
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if (!aconnector)
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return;
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mutex_lock(&hdcp_work->mutex);
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query.encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
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mod_hdcp_query_display(&hdcp_work->hdcp, aconnector->base.index, &query);
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if (query.encryption_status != hdcp_work->encryption_status) {
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hdcp_work->encryption_status = query.encryption_status;
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schedule_work(&hdcp_work->property_update_work);
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}
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mutex_unlock(&hdcp_work->mutex);
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}
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static void event_watchdog_timer(struct work_struct *work)
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{
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struct hdcp_workqueue *hdcp_work;
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hdcp_work = container_of(to_delayed_work(work),
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struct hdcp_workqueue,
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watchdog_timer_dwork);
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mutex_lock(&hdcp_work->mutex);
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cancel_delayed_work(&hdcp_work->watchdog_timer_dwork);
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mod_hdcp_process_event(&hdcp_work->hdcp,
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MOD_HDCP_EVENT_WATCHDOG_TIMEOUT,
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&hdcp_work->output);
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process_output(hdcp_work);
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mutex_unlock(&hdcp_work->mutex);
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}
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static void event_cpirq(struct work_struct *work)
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{
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struct hdcp_workqueue *hdcp_work;
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hdcp_work = container_of(work, struct hdcp_workqueue, cpirq_work);
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mutex_lock(&hdcp_work->mutex);
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mod_hdcp_process_event(&hdcp_work->hdcp, MOD_HDCP_EVENT_CPIRQ, &hdcp_work->output);
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process_output(hdcp_work);
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mutex_unlock(&hdcp_work->mutex);
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}
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void hdcp_destroy(struct kobject *kobj, struct hdcp_workqueue *hdcp_work)
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{
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int i = 0;
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for (i = 0; i < hdcp_work->max_link; i++) {
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cancel_delayed_work_sync(&hdcp_work[i].callback_dwork);
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cancel_delayed_work_sync(&hdcp_work[i].watchdog_timer_dwork);
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}
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sysfs_remove_bin_file(kobj, &hdcp_work[0].attr);
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kfree(hdcp_work->srm);
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kfree(hdcp_work->srm_temp);
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kfree(hdcp_work);
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}
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static bool enable_assr(void *handle, struct dc_link *link)
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{
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struct hdcp_workqueue *hdcp_work = handle;
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struct mod_hdcp hdcp = hdcp_work->hdcp;
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struct psp_context *psp = hdcp.config.psp.handle;
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struct ta_dtm_shared_memory *dtm_cmd;
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bool res = true;
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if (!psp->dtm_context.dtm_initialized) {
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DRM_INFO("Failed to enable ASSR, DTM TA is not initialized.");
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return false;
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}
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dtm_cmd = (struct ta_dtm_shared_memory *)psp->dtm_context.dtm_shared_buf;
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mutex_lock(&psp->dtm_context.mutex);
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memset(dtm_cmd, 0, sizeof(struct ta_dtm_shared_memory));
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dtm_cmd->cmd_id = TA_DTM_COMMAND__TOPOLOGY_ASSR_ENABLE;
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dtm_cmd->dtm_in_message.topology_assr_enable.display_topology_dig_be_index = link->link_enc_hw_inst;
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dtm_cmd->dtm_status = TA_DTM_STATUS__GENERIC_FAILURE;
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psp_dtm_invoke(psp, dtm_cmd->cmd_id);
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if (dtm_cmd->dtm_status != TA_DTM_STATUS__SUCCESS) {
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DRM_INFO("Failed to enable ASSR");
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res = false;
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}
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mutex_unlock(&psp->dtm_context.mutex);
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return res;
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}
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static void update_config(void *handle, struct cp_psp_stream_config *config)
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{
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struct hdcp_workqueue *hdcp_work = handle;
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struct amdgpu_dm_connector *aconnector = config->dm_stream_ctx;
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int link_index = aconnector->dc_link->link_index;
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struct mod_hdcp_display *display = &hdcp_work[link_index].display;
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struct mod_hdcp_link *link = &hdcp_work[link_index].link;
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if (config->dpms_off) {
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hdcp_remove_display(hdcp_work, link_index, aconnector);
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return;
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}
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memset(display, 0, sizeof(*display));
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memset(link, 0, sizeof(*link));
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display->index = aconnector->base.index;
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display->state = MOD_HDCP_DISPLAY_ACTIVE;
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if (aconnector->dc_sink != NULL)
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link->mode = mod_hdcp_signal_type_to_operation_mode(aconnector->dc_sink->sink_signal);
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display->controller = CONTROLLER_ID_D0 + config->otg_inst;
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display->dig_fe = config->stream_enc_inst;
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link->dig_be = config->link_enc_inst;
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link->ddc_line = aconnector->dc_link->ddc_hw_inst + 1;
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link->dp.rev = aconnector->dc_link->dpcd_caps.dpcd_rev.raw;
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link->dp.mst_supported = config->mst_supported;
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display->adjust.disable = 1;
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link->adjust.auth_delay = 3;
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link->adjust.hdcp1.disable = 0;
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hdcp_update_display(hdcp_work, link_index, aconnector, DRM_MODE_HDCP_CONTENT_TYPE0, false);
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}
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/* NOTE: From the usermodes prospective you only need to call write *ONCE*, the kernel
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* will automatically call once or twice depending on the size
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*
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* call: "cat file > /sys/class/drm/card0/device/hdcp_srm" from usermode no matter what the size is
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*
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* The kernel can only send PAGE_SIZE at once and since MAX_SRM_FILE(5120) > PAGE_SIZE(4096),
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* srm_data_write can be called multiple times.
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*
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* sysfs interface doesn't tell us the size we will get so we are sending partial SRMs to psp and on
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* the last call we will send the full SRM. PSP will fail on every call before the last.
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*
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* This means we don't know if the SRM is good until the last call. And because of this limitation we
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* cannot throw errors early as it will stop the kernel from writing to sysfs
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*
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* Example 1:
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* Good SRM size = 5096
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* first call to write 4096 -> PSP fails
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* Second call to write 1000 -> PSP Pass -> SRM is set
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*
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* Example 2:
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* Bad SRM size = 4096
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* first call to write 4096 -> PSP fails (This is the same as above, but we don't know if this
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* is the last call)
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*
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* Solution?:
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* 1: Parse the SRM? -> It is signed so we don't know the EOF
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* 2: We can have another sysfs that passes the size before calling set. -> simpler solution
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* below
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*
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* Easy Solution:
|
* Always call get after Set to verify if set was successful.
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* +----------------------+
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* | Why it works: |
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* +----------------------+
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* PSP will only update its srm if its older than the one we are trying to load.
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* Always do set first than get.
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* -if we try to "1. SET" a older version PSP will reject it and we can "2. GET" the newer
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* version and save it
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*
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* -if we try to "1. SET" a newer version PSP will accept it and we can "2. GET" the
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* same(newer) version back and save it
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*
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* -if we try to "1. SET" a newer version and PSP rejects it. That means the format is
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* incorrect/corrupted and we should correct our SRM by getting it from PSP
|
*/
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static ssize_t srm_data_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buffer,
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loff_t pos, size_t count)
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{
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struct hdcp_workqueue *work;
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uint32_t srm_version = 0;
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work = container_of(bin_attr, struct hdcp_workqueue, attr);
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link_lock(work, true);
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memcpy(work->srm_temp + pos, buffer, count);
|
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if (!psp_set_srm(work->hdcp.config.psp.handle, work->srm_temp, pos + count, &srm_version)) {
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DRM_DEBUG_DRIVER("HDCP SRM SET version 0x%X", srm_version);
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memcpy(work->srm, work->srm_temp, pos + count);
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work->srm_size = pos + count;
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work->srm_version = srm_version;
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}
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|
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link_lock(work, false);
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return count;
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}
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static ssize_t srm_data_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buffer,
|
loff_t pos, size_t count)
|
{
|
struct hdcp_workqueue *work;
|
uint8_t *srm = NULL;
|
uint32_t srm_version;
|
uint32_t srm_size;
|
size_t ret = count;
|
|
work = container_of(bin_attr, struct hdcp_workqueue, attr);
|
|
link_lock(work, true);
|
|
srm = psp_get_srm(work->hdcp.config.psp.handle, &srm_version, &srm_size);
|
|
if (!srm) {
|
ret = -EINVAL;
|
goto ret;
|
}
|
|
if (pos >= srm_size)
|
ret = 0;
|
|
if (srm_size - pos < count) {
|
memcpy(buffer, srm + pos, srm_size - pos);
|
ret = srm_size - pos;
|
goto ret;
|
}
|
|
memcpy(buffer, srm + pos, count);
|
|
ret:
|
link_lock(work, false);
|
return ret;
|
}
|
|
/* From the hdcp spec (5.Renewability) SRM needs to be stored in a non-volatile memory.
|
*
|
* For example,
|
* if Application "A" sets the SRM (ver 2) and we reboot/suspend and later when Application "B"
|
* needs to use HDCP, the version in PSP should be SRM(ver 2). So SRM should be persistent
|
* across boot/reboots/suspend/resume/shutdown
|
*
|
* Currently when the system goes down (suspend/shutdown) the SRM is cleared from PSP. For HDCP we need
|
* to make the SRM persistent.
|
*
|
* -PSP owns the checking of SRM but doesn't have the ability to store it in a non-volatile memory.
|
* -The kernel cannot write to the file systems.
|
* -So we need usermode to do this for us, which is why an interface for usermode is needed
|
*
|
*
|
*
|
* Usermode can read/write to/from PSP using the sysfs interface
|
* For example:
|
* to save SRM from PSP to storage : cat /sys/class/drm/card0/device/hdcp_srm > srmfile
|
* to load from storage to PSP: cat srmfile > /sys/class/drm/card0/device/hdcp_srm
|
*/
|
static const struct bin_attribute data_attr = {
|
.attr = {.name = "hdcp_srm", .mode = 0664},
|
.size = PSP_HDCP_SRM_FIRST_GEN_MAX_SIZE, /* Limit SRM size */
|
.write = srm_data_write,
|
.read = srm_data_read,
|
};
|
|
|
struct hdcp_workqueue *hdcp_create_workqueue(struct amdgpu_device *adev, struct cp_psp *cp_psp, struct dc *dc)
|
{
|
|
int max_caps = dc->caps.max_links;
|
struct hdcp_workqueue *hdcp_work;
|
int i = 0;
|
|
hdcp_work = kcalloc(max_caps, sizeof(*hdcp_work), GFP_KERNEL);
|
if (ZERO_OR_NULL_PTR(hdcp_work))
|
return NULL;
|
|
hdcp_work->srm = kcalloc(PSP_HDCP_SRM_FIRST_GEN_MAX_SIZE, sizeof(*hdcp_work->srm), GFP_KERNEL);
|
|
if (hdcp_work->srm == NULL)
|
goto fail_alloc_context;
|
|
hdcp_work->srm_temp = kcalloc(PSP_HDCP_SRM_FIRST_GEN_MAX_SIZE, sizeof(*hdcp_work->srm_temp), GFP_KERNEL);
|
|
if (hdcp_work->srm_temp == NULL)
|
goto fail_alloc_context;
|
|
hdcp_work->max_link = max_caps;
|
|
for (i = 0; i < max_caps; i++) {
|
mutex_init(&hdcp_work[i].mutex);
|
|
INIT_WORK(&hdcp_work[i].cpirq_work, event_cpirq);
|
INIT_WORK(&hdcp_work[i].property_update_work, event_property_update);
|
INIT_DELAYED_WORK(&hdcp_work[i].callback_dwork, event_callback);
|
INIT_DELAYED_WORK(&hdcp_work[i].watchdog_timer_dwork, event_watchdog_timer);
|
INIT_DELAYED_WORK(&hdcp_work[i].property_validate_dwork, event_property_validate);
|
|
hdcp_work[i].hdcp.config.psp.handle = &adev->psp;
|
hdcp_work[i].hdcp.config.ddc.handle = dc_get_link_at_index(dc, i);
|
hdcp_work[i].hdcp.config.ddc.funcs.write_i2c = lp_write_i2c;
|
hdcp_work[i].hdcp.config.ddc.funcs.read_i2c = lp_read_i2c;
|
hdcp_work[i].hdcp.config.ddc.funcs.write_dpcd = lp_write_dpcd;
|
hdcp_work[i].hdcp.config.ddc.funcs.read_dpcd = lp_read_dpcd;
|
}
|
|
cp_psp->funcs.update_stream_config = update_config;
|
cp_psp->funcs.enable_assr = enable_assr;
|
cp_psp->handle = hdcp_work;
|
|
/* File created at /sys/class/drm/card0/device/hdcp_srm*/
|
hdcp_work[0].attr = data_attr;
|
sysfs_bin_attr_init(&hdcp_work[0].attr);
|
|
if (sysfs_create_bin_file(&adev->dev->kobj, &hdcp_work[0].attr))
|
DRM_WARN("Failed to create device file hdcp_srm");
|
|
return hdcp_work;
|
|
fail_alloc_context:
|
kfree(hdcp_work->srm);
|
kfree(hdcp_work->srm_temp);
|
kfree(hdcp_work);
|
|
return NULL;
|
|
|
|
}
|
