1a193ed20SBhawanpreet Lakha /* 2a193ed20SBhawanpreet Lakha * Copyright 2019 Advanced Micro Devices, Inc. 3a193ed20SBhawanpreet Lakha * 4a193ed20SBhawanpreet Lakha * Permission is hereby granted, free of charge, to any person obtaining a 5a193ed20SBhawanpreet Lakha * copy of this software and associated documentation files (the "Software"), 6a193ed20SBhawanpreet Lakha * to deal in the Software without restriction, including without limitation 7a193ed20SBhawanpreet Lakha * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8a193ed20SBhawanpreet Lakha * and/or sell copies of the Software, and to permit persons to whom the 9a193ed20SBhawanpreet Lakha * Software is furnished to do so, subject to the following conditions: 10a193ed20SBhawanpreet Lakha * 11a193ed20SBhawanpreet Lakha * The above copyright notice and this permission notice shall be included in 12a193ed20SBhawanpreet Lakha * all copies or substantial portions of the Software. 13a193ed20SBhawanpreet Lakha * 14a193ed20SBhawanpreet Lakha * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15a193ed20SBhawanpreet Lakha * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16a193ed20SBhawanpreet Lakha * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17a193ed20SBhawanpreet Lakha * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18a193ed20SBhawanpreet Lakha * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19a193ed20SBhawanpreet Lakha * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20a193ed20SBhawanpreet Lakha * OTHER DEALINGS IN THE SOFTWARE. 21a193ed20SBhawanpreet Lakha * 22a193ed20SBhawanpreet Lakha * Authors: AMD 23a193ed20SBhawanpreet Lakha * 24a193ed20SBhawanpreet Lakha */ 25a193ed20SBhawanpreet Lakha 26a193ed20SBhawanpreet Lakha #include "amdgpu_dm_hdcp.h" 27a193ed20SBhawanpreet Lakha #include "amdgpu.h" 28a193ed20SBhawanpreet Lakha #include "amdgpu_dm.h" 2955b50e68SBhawanpreet Lakha #include "dm_helpers.h" 306a99099fSThomas Zimmermann #include <drm/display/drm_hdcp_helper.h> 319037246bSBhawanpreet Lakha #include "hdcp_psp.h" 329037246bSBhawanpreet Lakha 331746d5a1SBhawanpreet Lakha /* 341746d5a1SBhawanpreet Lakha * If the SRM version being loaded is less than or equal to the 351746d5a1SBhawanpreet Lakha * currently loaded SRM, psp will return 0xFFFF as the version 361746d5a1SBhawanpreet Lakha */ 371746d5a1SBhawanpreet Lakha #define PSP_SRM_VERSION_MAX 0xFFFF 3855b50e68SBhawanpreet Lakha 39dab8f7e9Szhengbin static bool 40dab8f7e9Szhengbin lp_write_i2c(void *handle, uint32_t address, const uint8_t *data, uint32_t size) 4155b50e68SBhawanpreet Lakha { 4255b50e68SBhawanpreet Lakha 4355b50e68SBhawanpreet Lakha struct dc_link *link = handle; 4455b50e68SBhawanpreet Lakha struct i2c_payload i2c_payloads[] = {{true, address, size, (void *)data} }; 4555b50e68SBhawanpreet Lakha struct i2c_command cmd = {i2c_payloads, 1, I2C_COMMAND_ENGINE_HW, link->dc->caps.i2c_speed_in_khz}; 4655b50e68SBhawanpreet Lakha 4755b50e68SBhawanpreet Lakha return dm_helpers_submit_i2c(link->ctx, link, &cmd); 4855b50e68SBhawanpreet Lakha } 4955b50e68SBhawanpreet Lakha 50dab8f7e9Szhengbin static bool 51dab8f7e9Szhengbin lp_read_i2c(void *handle, uint32_t address, uint8_t offset, uint8_t *data, uint32_t size) 5255b50e68SBhawanpreet Lakha { 5355b50e68SBhawanpreet Lakha struct dc_link *link = handle; 5455b50e68SBhawanpreet Lakha 5555b50e68SBhawanpreet Lakha struct i2c_payload i2c_payloads[] = {{true, address, 1, &offset}, {false, address, size, data} }; 5655b50e68SBhawanpreet Lakha struct i2c_command cmd = {i2c_payloads, 2, I2C_COMMAND_ENGINE_HW, link->dc->caps.i2c_speed_in_khz}; 5755b50e68SBhawanpreet Lakha 5855b50e68SBhawanpreet Lakha return dm_helpers_submit_i2c(link->ctx, link, &cmd); 5955b50e68SBhawanpreet Lakha } 6055b50e68SBhawanpreet Lakha 61dab8f7e9Szhengbin static bool 62dab8f7e9Szhengbin lp_write_dpcd(void *handle, uint32_t address, const uint8_t *data, uint32_t size) 6355b50e68SBhawanpreet Lakha { 6455b50e68SBhawanpreet Lakha struct dc_link *link = handle; 6555b50e68SBhawanpreet Lakha 6655b50e68SBhawanpreet Lakha return dm_helpers_dp_write_dpcd(link->ctx, link, address, data, size); 6755b50e68SBhawanpreet Lakha } 6855b50e68SBhawanpreet Lakha 69dab8f7e9Szhengbin static bool 70dab8f7e9Szhengbin lp_read_dpcd(void *handle, uint32_t address, uint8_t *data, uint32_t size) 7155b50e68SBhawanpreet Lakha { 7255b50e68SBhawanpreet Lakha struct dc_link *link = handle; 7355b50e68SBhawanpreet Lakha 7455b50e68SBhawanpreet Lakha return dm_helpers_dp_read_dpcd(link->ctx, link, address, data, size); 7555b50e68SBhawanpreet Lakha } 76a193ed20SBhawanpreet Lakha 779037246bSBhawanpreet Lakha static uint8_t *psp_get_srm(struct psp_context *psp, uint32_t *srm_version, uint32_t *srm_size) 789037246bSBhawanpreet Lakha { 791746d5a1SBhawanpreet Lakha 801746d5a1SBhawanpreet Lakha struct ta_hdcp_shared_memory *hdcp_cmd; 811746d5a1SBhawanpreet Lakha 82ce97f37bSCandice Li if (!psp->hdcp_context.context.initialized) { 831746d5a1SBhawanpreet Lakha DRM_WARN("Failed to get hdcp srm. HDCP TA is not initialized."); 849037246bSBhawanpreet Lakha return NULL; 859037246bSBhawanpreet Lakha } 869037246bSBhawanpreet Lakha 87ce97f37bSCandice Li hdcp_cmd = (struct ta_hdcp_shared_memory *)psp->hdcp_context.context.mem_context.shared_buf; 881746d5a1SBhawanpreet Lakha memset(hdcp_cmd, 0, sizeof(struct ta_hdcp_shared_memory)); 891746d5a1SBhawanpreet Lakha 901746d5a1SBhawanpreet Lakha hdcp_cmd->cmd_id = TA_HDCP_COMMAND__HDCP_GET_SRM; 911746d5a1SBhawanpreet Lakha psp_hdcp_invoke(psp, hdcp_cmd->cmd_id); 921746d5a1SBhawanpreet Lakha 931746d5a1SBhawanpreet Lakha if (hdcp_cmd->hdcp_status != TA_HDCP_STATUS__SUCCESS) 941746d5a1SBhawanpreet Lakha return NULL; 951746d5a1SBhawanpreet Lakha 961746d5a1SBhawanpreet Lakha *srm_version = hdcp_cmd->out_msg.hdcp_get_srm.srm_version; 971746d5a1SBhawanpreet Lakha *srm_size = hdcp_cmd->out_msg.hdcp_get_srm.srm_buf_size; 981746d5a1SBhawanpreet Lakha 991746d5a1SBhawanpreet Lakha 1001746d5a1SBhawanpreet Lakha return hdcp_cmd->out_msg.hdcp_get_srm.srm_buf; 1011746d5a1SBhawanpreet Lakha } 1021746d5a1SBhawanpreet Lakha 1039037246bSBhawanpreet Lakha static int psp_set_srm(struct psp_context *psp, uint8_t *srm, uint32_t srm_size, uint32_t *srm_version) 1049037246bSBhawanpreet Lakha { 1051746d5a1SBhawanpreet Lakha 1061746d5a1SBhawanpreet Lakha struct ta_hdcp_shared_memory *hdcp_cmd; 1071746d5a1SBhawanpreet Lakha 108ce97f37bSCandice Li if (!psp->hdcp_context.context.initialized) { 1091746d5a1SBhawanpreet Lakha DRM_WARN("Failed to get hdcp srm. HDCP TA is not initialized."); 1101746d5a1SBhawanpreet Lakha return -EINVAL; 1111746d5a1SBhawanpreet Lakha } 1121746d5a1SBhawanpreet Lakha 113ce97f37bSCandice Li hdcp_cmd = (struct ta_hdcp_shared_memory *)psp->hdcp_context.context.mem_context.shared_buf; 1141746d5a1SBhawanpreet Lakha memset(hdcp_cmd, 0, sizeof(struct ta_hdcp_shared_memory)); 1151746d5a1SBhawanpreet Lakha 1161746d5a1SBhawanpreet Lakha memcpy(hdcp_cmd->in_msg.hdcp_set_srm.srm_buf, srm, srm_size); 1171746d5a1SBhawanpreet Lakha hdcp_cmd->in_msg.hdcp_set_srm.srm_buf_size = srm_size; 1181746d5a1SBhawanpreet Lakha hdcp_cmd->cmd_id = TA_HDCP_COMMAND__HDCP_SET_SRM; 1191746d5a1SBhawanpreet Lakha 1201746d5a1SBhawanpreet Lakha psp_hdcp_invoke(psp, hdcp_cmd->cmd_id); 1211746d5a1SBhawanpreet Lakha 1221746d5a1SBhawanpreet Lakha if (hdcp_cmd->hdcp_status != TA_HDCP_STATUS__SUCCESS || hdcp_cmd->out_msg.hdcp_set_srm.valid_signature != 1 || 1231746d5a1SBhawanpreet Lakha hdcp_cmd->out_msg.hdcp_set_srm.srm_version == PSP_SRM_VERSION_MAX) 1241746d5a1SBhawanpreet Lakha return -EINVAL; 1251746d5a1SBhawanpreet Lakha 1261746d5a1SBhawanpreet Lakha *srm_version = hdcp_cmd->out_msg.hdcp_set_srm.srm_version; 1279037246bSBhawanpreet Lakha return 0; 1289037246bSBhawanpreet Lakha } 1299037246bSBhawanpreet Lakha 130a193ed20SBhawanpreet Lakha static void process_output(struct hdcp_workqueue *hdcp_work) 131a193ed20SBhawanpreet Lakha { 132a193ed20SBhawanpreet Lakha struct mod_hdcp_output output = hdcp_work->output; 133a193ed20SBhawanpreet Lakha 134a193ed20SBhawanpreet Lakha if (output.callback_stop) 135a193ed20SBhawanpreet Lakha cancel_delayed_work(&hdcp_work->callback_dwork); 136a193ed20SBhawanpreet Lakha 137a193ed20SBhawanpreet Lakha if (output.callback_needed) 138a193ed20SBhawanpreet Lakha schedule_delayed_work(&hdcp_work->callback_dwork, 139a193ed20SBhawanpreet Lakha msecs_to_jiffies(output.callback_delay)); 140a193ed20SBhawanpreet Lakha 141a193ed20SBhawanpreet Lakha if (output.watchdog_timer_stop) 142a193ed20SBhawanpreet Lakha cancel_delayed_work(&hdcp_work->watchdog_timer_dwork); 143a193ed20SBhawanpreet Lakha 144a193ed20SBhawanpreet Lakha if (output.watchdog_timer_needed) 145a193ed20SBhawanpreet Lakha schedule_delayed_work(&hdcp_work->watchdog_timer_dwork, 146a193ed20SBhawanpreet Lakha msecs_to_jiffies(output.watchdog_timer_delay)); 147a193ed20SBhawanpreet Lakha 14845375a50SBhawanpreet Lakha schedule_delayed_work(&hdcp_work->property_validate_dwork, msecs_to_jiffies(0)); 149a193ed20SBhawanpreet Lakha } 150a193ed20SBhawanpreet Lakha 1519037246bSBhawanpreet Lakha static void link_lock(struct hdcp_workqueue *work, bool lock) 1529037246bSBhawanpreet Lakha { 1539037246bSBhawanpreet Lakha 1549037246bSBhawanpreet Lakha int i = 0; 1559037246bSBhawanpreet Lakha 1569037246bSBhawanpreet Lakha for (i = 0; i < work->max_link; i++) { 1579037246bSBhawanpreet Lakha if (lock) 1589037246bSBhawanpreet Lakha mutex_lock(&work[i].mutex); 1599037246bSBhawanpreet Lakha else 1609037246bSBhawanpreet Lakha mutex_unlock(&work[i].mutex); 1619037246bSBhawanpreet Lakha } 1629037246bSBhawanpreet Lakha } 163b1abe558SBhawanpreet Lakha void hdcp_update_display(struct hdcp_workqueue *hdcp_work, 164b1abe558SBhawanpreet Lakha unsigned int link_index, 165b1abe558SBhawanpreet Lakha struct amdgpu_dm_connector *aconnector, 16623eb4191SBhawanpreet Lakha uint8_t content_type, 167b1abe558SBhawanpreet Lakha bool enable_encryption) 168a193ed20SBhawanpreet Lakha { 169a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index]; 170a193ed20SBhawanpreet Lakha struct mod_hdcp_display *display = &hdcp_work[link_index].display; 171a193ed20SBhawanpreet Lakha struct mod_hdcp_link *link = &hdcp_work[link_index].link; 172b1abe558SBhawanpreet Lakha struct mod_hdcp_display_query query; 173*aa9fdd5dShersen wu unsigned int conn_index = aconnector->base.index; 174a193ed20SBhawanpreet Lakha 175a193ed20SBhawanpreet Lakha mutex_lock(&hdcp_w->mutex); 176*aa9fdd5dShersen wu hdcp_w->aconnector[conn_index] = aconnector; 177a193ed20SBhawanpreet Lakha 178b1abe558SBhawanpreet Lakha query.display = NULL; 179b1abe558SBhawanpreet Lakha mod_hdcp_query_display(&hdcp_w->hdcp, aconnector->base.index, &query); 180b1abe558SBhawanpreet Lakha 181b1abe558SBhawanpreet Lakha if (query.display != NULL) { 182b1abe558SBhawanpreet Lakha memcpy(display, query.display, sizeof(struct mod_hdcp_display)); 183b1abe558SBhawanpreet Lakha mod_hdcp_remove_display(&hdcp_w->hdcp, aconnector->base.index, &hdcp_w->output); 184b1abe558SBhawanpreet Lakha 18523eb4191SBhawanpreet Lakha hdcp_w->link.adjust.hdcp2.force_type = MOD_HDCP_FORCE_TYPE_0; 18623eb4191SBhawanpreet Lakha 187b1abe558SBhawanpreet Lakha if (enable_encryption) { 188f4406d6fSBhawanpreet Lakha /* Explicitly set the saved SRM as sysfs call will be after we already enabled hdcp 189f4406d6fSBhawanpreet Lakha * (s3 resume case) 190f4406d6fSBhawanpreet Lakha */ 191f4406d6fSBhawanpreet Lakha if (hdcp_work->srm_size > 0) 192f4406d6fSBhawanpreet Lakha psp_set_srm(hdcp_work->hdcp.config.psp.handle, hdcp_work->srm, hdcp_work->srm_size, 193f4406d6fSBhawanpreet Lakha &hdcp_work->srm_version); 194f4406d6fSBhawanpreet Lakha 1954fe1fdccSWenjing Liu display->adjust.disable = MOD_HDCP_DISPLAY_NOT_DISABLE; 196c2850c12SBhawanpreet Lakha if (content_type == DRM_MODE_HDCP_CONTENT_TYPE0) { 197c2850c12SBhawanpreet Lakha hdcp_w->link.adjust.hdcp1.disable = 0; 19823eb4191SBhawanpreet Lakha hdcp_w->link.adjust.hdcp2.force_type = MOD_HDCP_FORCE_TYPE_0; 199c2850c12SBhawanpreet Lakha } else if (content_type == DRM_MODE_HDCP_CONTENT_TYPE1) { 200c2850c12SBhawanpreet Lakha hdcp_w->link.adjust.hdcp1.disable = 1; 20123eb4191SBhawanpreet Lakha hdcp_w->link.adjust.hdcp2.force_type = MOD_HDCP_FORCE_TYPE_1; 202c2850c12SBhawanpreet Lakha } 20323eb4191SBhawanpreet Lakha 204b1abe558SBhawanpreet Lakha schedule_delayed_work(&hdcp_w->property_validate_dwork, 205b1abe558SBhawanpreet Lakha msecs_to_jiffies(DRM_HDCP_CHECK_PERIOD_MS)); 206b1abe558SBhawanpreet Lakha } else { 2074fe1fdccSWenjing Liu display->adjust.disable = MOD_HDCP_DISPLAY_DISABLE_AUTHENTICATION; 208*aa9fdd5dShersen wu hdcp_w->encryption_status[conn_index] = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF; 209b1abe558SBhawanpreet Lakha cancel_delayed_work(&hdcp_w->property_validate_dwork); 210b1abe558SBhawanpreet Lakha } 211b1abe558SBhawanpreet Lakha 212b1abe558SBhawanpreet Lakha display->state = MOD_HDCP_DISPLAY_ACTIVE; 213b1abe558SBhawanpreet Lakha } 21453e108aaSBhawanpreet Lakha 215a193ed20SBhawanpreet Lakha mod_hdcp_add_display(&hdcp_w->hdcp, link, display, &hdcp_w->output); 216a193ed20SBhawanpreet Lakha 217a193ed20SBhawanpreet Lakha process_output(hdcp_w); 218a193ed20SBhawanpreet Lakha mutex_unlock(&hdcp_w->mutex); 219a193ed20SBhawanpreet Lakha } 220a193ed20SBhawanpreet Lakha 221a30a8c2fSBhawanpreet Lakha static void hdcp_remove_display(struct hdcp_workqueue *hdcp_work, 222a30a8c2fSBhawanpreet Lakha unsigned int link_index, 223a30a8c2fSBhawanpreet Lakha struct amdgpu_dm_connector *aconnector) 224a30a8c2fSBhawanpreet Lakha { 225a30a8c2fSBhawanpreet Lakha struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index]; 226caa18dd6SDingchen (David) Zhang struct drm_connector_state *conn_state = aconnector->base.state; 227*aa9fdd5dShersen wu unsigned int conn_index = aconnector->base.index; 228a30a8c2fSBhawanpreet Lakha 229a30a8c2fSBhawanpreet Lakha mutex_lock(&hdcp_w->mutex); 230*aa9fdd5dShersen wu hdcp_w->aconnector[conn_index] = aconnector; 231a30a8c2fSBhawanpreet Lakha 232caa18dd6SDingchen (David) Zhang /* the removal of display will invoke auth reset -> hdcp destroy and 233caa18dd6SDingchen (David) Zhang * we'd expect the Content Protection (CP) property changed back to 234caa18dd6SDingchen (David) Zhang * DESIRED if at the time ENABLED. CP property change should occur 235caa18dd6SDingchen (David) Zhang * before the element removed from linked list. 236caa18dd6SDingchen (David) Zhang */ 237caa18dd6SDingchen (David) Zhang if (conn_state && conn_state->content_protection == DRM_MODE_CONTENT_PROTECTION_ENABLED) { 238caa18dd6SDingchen (David) Zhang conn_state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED; 239caa18dd6SDingchen (David) Zhang 240caa18dd6SDingchen (David) Zhang DRM_DEBUG_DRIVER("[HDCP_DM] display %d, CP 2 -> 1, type %u, DPMS %u\n", 241caa18dd6SDingchen (David) Zhang aconnector->base.index, conn_state->hdcp_content_type, aconnector->base.dpms); 242caa18dd6SDingchen (David) Zhang } 243caa18dd6SDingchen (David) Zhang 244a30a8c2fSBhawanpreet Lakha mod_hdcp_remove_display(&hdcp_w->hdcp, aconnector->base.index, &hdcp_w->output); 245a30a8c2fSBhawanpreet Lakha 246a30a8c2fSBhawanpreet Lakha process_output(hdcp_w); 247a30a8c2fSBhawanpreet Lakha mutex_unlock(&hdcp_w->mutex); 248a30a8c2fSBhawanpreet Lakha } 249a193ed20SBhawanpreet Lakha void hdcp_reset_display(struct hdcp_workqueue *hdcp_work, unsigned int link_index) 250a193ed20SBhawanpreet Lakha { 251a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index]; 252*aa9fdd5dShersen wu unsigned int conn_index; 253a193ed20SBhawanpreet Lakha 254a193ed20SBhawanpreet Lakha mutex_lock(&hdcp_w->mutex); 255a193ed20SBhawanpreet Lakha 256a193ed20SBhawanpreet Lakha mod_hdcp_reset_connection(&hdcp_w->hdcp, &hdcp_w->output); 257a193ed20SBhawanpreet Lakha 258da3fd7acSBhawanpreet Lakha cancel_delayed_work(&hdcp_w->property_validate_dwork); 259*aa9fdd5dShersen wu 260*aa9fdd5dShersen wu for (conn_index = 0; conn_index < AMDGPU_DM_MAX_DISPLAY_INDEX; conn_index++) { 261*aa9fdd5dShersen wu hdcp_w->encryption_status[conn_index] = 262*aa9fdd5dShersen wu MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF; 263*aa9fdd5dShersen wu } 264da3fd7acSBhawanpreet Lakha 265a193ed20SBhawanpreet Lakha process_output(hdcp_w); 266a193ed20SBhawanpreet Lakha 267a193ed20SBhawanpreet Lakha mutex_unlock(&hdcp_w->mutex); 268a193ed20SBhawanpreet Lakha } 269a193ed20SBhawanpreet Lakha 270a193ed20SBhawanpreet Lakha void hdcp_handle_cpirq(struct hdcp_workqueue *hdcp_work, unsigned int link_index) 271a193ed20SBhawanpreet Lakha { 272a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index]; 273a193ed20SBhawanpreet Lakha 274a193ed20SBhawanpreet Lakha schedule_work(&hdcp_w->cpirq_work); 275a193ed20SBhawanpreet Lakha } 276a193ed20SBhawanpreet Lakha 277a193ed20SBhawanpreet Lakha 278a193ed20SBhawanpreet Lakha 279a193ed20SBhawanpreet Lakha 280a193ed20SBhawanpreet Lakha static void event_callback(struct work_struct *work) 281a193ed20SBhawanpreet Lakha { 282a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_work; 283a193ed20SBhawanpreet Lakha 284a193ed20SBhawanpreet Lakha hdcp_work = container_of(to_delayed_work(work), struct hdcp_workqueue, 285a193ed20SBhawanpreet Lakha callback_dwork); 286a193ed20SBhawanpreet Lakha 287a193ed20SBhawanpreet Lakha mutex_lock(&hdcp_work->mutex); 288a193ed20SBhawanpreet Lakha 2892ebbe7c9SBhawanpreet Lakha cancel_delayed_work(&hdcp_work->callback_dwork); 290a193ed20SBhawanpreet Lakha 291a193ed20SBhawanpreet Lakha mod_hdcp_process_event(&hdcp_work->hdcp, MOD_HDCP_EVENT_CALLBACK, 292a193ed20SBhawanpreet Lakha &hdcp_work->output); 293a193ed20SBhawanpreet Lakha 294a193ed20SBhawanpreet Lakha process_output(hdcp_work); 295a193ed20SBhawanpreet Lakha 296a193ed20SBhawanpreet Lakha mutex_unlock(&hdcp_work->mutex); 297a193ed20SBhawanpreet Lakha 298a193ed20SBhawanpreet Lakha 299a193ed20SBhawanpreet Lakha } 300*aa9fdd5dShersen wu 301da3fd7acSBhawanpreet Lakha static void event_property_update(struct work_struct *work) 302da3fd7acSBhawanpreet Lakha { 303da3fd7acSBhawanpreet Lakha struct hdcp_workqueue *hdcp_work = container_of(work, struct hdcp_workqueue, property_update_work); 304*aa9fdd5dShersen wu struct amdgpu_dm_connector *aconnector = NULL; 305*aa9fdd5dShersen wu struct drm_device *dev; 306da3fd7acSBhawanpreet Lakha long ret; 307*aa9fdd5dShersen wu unsigned int conn_index; 308*aa9fdd5dShersen wu struct drm_connector *connector; 309*aa9fdd5dShersen wu struct drm_connector_state *conn_state; 310*aa9fdd5dShersen wu 311*aa9fdd5dShersen wu for (conn_index = 0; conn_index < AMDGPU_DM_MAX_DISPLAY_INDEX; conn_index++) { 312*aa9fdd5dShersen wu aconnector = hdcp_work->aconnector[conn_index]; 313*aa9fdd5dShersen wu 314*aa9fdd5dShersen wu if (!aconnector) 315*aa9fdd5dShersen wu continue; 316*aa9fdd5dShersen wu 317*aa9fdd5dShersen wu if (!aconnector->base.index) 318*aa9fdd5dShersen wu continue; 319*aa9fdd5dShersen wu 320*aa9fdd5dShersen wu connector = &aconnector->base; 321*aa9fdd5dShersen wu 322*aa9fdd5dShersen wu /* check if display connected */ 323*aa9fdd5dShersen wu if (connector->status != connector_status_connected) 324*aa9fdd5dShersen wu continue; 325*aa9fdd5dShersen wu 326*aa9fdd5dShersen wu conn_state = aconnector->base.state; 327*aa9fdd5dShersen wu 328*aa9fdd5dShersen wu if (!conn_state) 329*aa9fdd5dShersen wu continue; 330*aa9fdd5dShersen wu 331*aa9fdd5dShersen wu dev = connector->dev; 332*aa9fdd5dShersen wu 333*aa9fdd5dShersen wu if (!dev) 334*aa9fdd5dShersen wu continue; 335da3fd7acSBhawanpreet Lakha 336da3fd7acSBhawanpreet Lakha drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 337da3fd7acSBhawanpreet Lakha mutex_lock(&hdcp_work->mutex); 338da3fd7acSBhawanpreet Lakha 339*aa9fdd5dShersen wu if (conn_state->commit) { 340*aa9fdd5dShersen wu ret = wait_for_completion_interruptible_timeout( 341*aa9fdd5dShersen wu &conn_state->commit->hw_done, 10 * HZ); 342da3fd7acSBhawanpreet Lakha if (ret == 0) { 343*aa9fdd5dShersen wu DRM_ERROR( 344*aa9fdd5dShersen wu "HDCP state unknown! Setting it to DESIRED"); 345*aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index] = 346*aa9fdd5dShersen wu MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF; 347da3fd7acSBhawanpreet Lakha } 348da3fd7acSBhawanpreet Lakha } 349*aa9fdd5dShersen wu if (hdcp_work->encryption_status[conn_index] != 350*aa9fdd5dShersen wu MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF) { 351*aa9fdd5dShersen wu if (conn_state->hdcp_content_type == 35272bb5030Shersen wu DRM_MODE_HDCP_CONTENT_TYPE0 && 353*aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index] <= 354*aa9fdd5dShersen wu MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE0_ON) { 355da3fd7acSBhawanpreet Lakha 356*aa9fdd5dShersen wu DRM_DEBUG_DRIVER("[HDCP_DM] DRM_MODE_CONTENT_PROTECTION_ENABLED\n"); 357*aa9fdd5dShersen wu drm_hdcp_update_content_protection( 358*aa9fdd5dShersen wu connector, 359*aa9fdd5dShersen wu DRM_MODE_CONTENT_PROTECTION_ENABLED); 360*aa9fdd5dShersen wu } else if (conn_state->hdcp_content_type == 361*aa9fdd5dShersen wu DRM_MODE_HDCP_CONTENT_TYPE1 && 362*aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index] == 363*aa9fdd5dShersen wu MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE1_ON) { 364*aa9fdd5dShersen wu drm_hdcp_update_content_protection( 365*aa9fdd5dShersen wu connector, 366*aa9fdd5dShersen wu DRM_MODE_CONTENT_PROTECTION_ENABLED); 367*aa9fdd5dShersen wu } 368*aa9fdd5dShersen wu } else { 369*aa9fdd5dShersen wu DRM_DEBUG_DRIVER("[HDCP_DM] DRM_MODE_CONTENT_PROTECTION_DESIRED\n"); 370*aa9fdd5dShersen wu drm_hdcp_update_content_protection( 371*aa9fdd5dShersen wu connector, DRM_MODE_CONTENT_PROTECTION_DESIRED); 372*aa9fdd5dShersen wu 373*aa9fdd5dShersen wu } 374da3fd7acSBhawanpreet Lakha mutex_unlock(&hdcp_work->mutex); 375da3fd7acSBhawanpreet Lakha drm_modeset_unlock(&dev->mode_config.connection_mutex); 376da3fd7acSBhawanpreet Lakha } 377*aa9fdd5dShersen wu } 378da3fd7acSBhawanpreet Lakha 379da3fd7acSBhawanpreet Lakha static void event_property_validate(struct work_struct *work) 380da3fd7acSBhawanpreet Lakha { 381da3fd7acSBhawanpreet Lakha struct hdcp_workqueue *hdcp_work = 382da3fd7acSBhawanpreet Lakha container_of(to_delayed_work(work), struct hdcp_workqueue, property_validate_dwork); 383da3fd7acSBhawanpreet Lakha struct mod_hdcp_display_query query; 384*aa9fdd5dShersen wu struct amdgpu_dm_connector *aconnector; 385*aa9fdd5dShersen wu unsigned int conn_index; 38679c4ac0dSBhawanpreet Lakha 387da3fd7acSBhawanpreet Lakha mutex_lock(&hdcp_work->mutex); 388da3fd7acSBhawanpreet Lakha 389*aa9fdd5dShersen wu for (conn_index = 0; conn_index < AMDGPU_DM_MAX_DISPLAY_INDEX; 390*aa9fdd5dShersen wu conn_index++) { 391*aa9fdd5dShersen wu aconnector = hdcp_work->aconnector[conn_index]; 392da3fd7acSBhawanpreet Lakha 393*aa9fdd5dShersen wu 394*aa9fdd5dShersen wu if (!aconnector) 395*aa9fdd5dShersen wu continue; 396*aa9fdd5dShersen wu 397*aa9fdd5dShersen wu if (!aconnector->base.index) 398*aa9fdd5dShersen wu continue; 399*aa9fdd5dShersen wu 400*aa9fdd5dShersen wu /* check if display connected */ 401*aa9fdd5dShersen wu if (aconnector->base.status != connector_status_connected) 402*aa9fdd5dShersen wu continue; 403*aa9fdd5dShersen wu 404*aa9fdd5dShersen wu if (!aconnector->base.state) 405*aa9fdd5dShersen wu continue; 406*aa9fdd5dShersen wu 407*aa9fdd5dShersen wu query.encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF; 408*aa9fdd5dShersen wu mod_hdcp_query_display(&hdcp_work->hdcp, aconnector->base.index, 409*aa9fdd5dShersen wu &query); 410*aa9fdd5dShersen wu 411*aa9fdd5dShersen wu DRM_DEBUG_DRIVER("[HDCP_DM] disp %d, connector->CP %u, (query, work): (%d, %d)\n", 412*aa9fdd5dShersen wu aconnector->base.index, 413*aa9fdd5dShersen wu aconnector->base.state->content_protection, 414*aa9fdd5dShersen wu query.encryption_status, 415*aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index]); 416*aa9fdd5dShersen wu 417*aa9fdd5dShersen wu if (query.encryption_status != 418*aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index]) { 419*aa9fdd5dShersen wu DRM_DEBUG_DRIVER("[HDCP_DM] encryption_status change from %x to %x\n", 420*aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index], query.encryption_status); 421*aa9fdd5dShersen wu 422*aa9fdd5dShersen wu hdcp_work->encryption_status[conn_index] = 423*aa9fdd5dShersen wu query.encryption_status; 424*aa9fdd5dShersen wu 425*aa9fdd5dShersen wu DRM_DEBUG_DRIVER("[HDCP_DM] trigger property_update_work\n"); 426*aa9fdd5dShersen wu 427da3fd7acSBhawanpreet Lakha schedule_work(&hdcp_work->property_update_work); 428da3fd7acSBhawanpreet Lakha } 429*aa9fdd5dShersen wu } 430da3fd7acSBhawanpreet Lakha 431da3fd7acSBhawanpreet Lakha mutex_unlock(&hdcp_work->mutex); 432da3fd7acSBhawanpreet Lakha } 433a193ed20SBhawanpreet Lakha 434a193ed20SBhawanpreet Lakha static void event_watchdog_timer(struct work_struct *work) 435a193ed20SBhawanpreet Lakha { 436a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_work; 437a193ed20SBhawanpreet Lakha 438a193ed20SBhawanpreet Lakha hdcp_work = container_of(to_delayed_work(work), 439a193ed20SBhawanpreet Lakha struct hdcp_workqueue, 440a193ed20SBhawanpreet Lakha watchdog_timer_dwork); 441a193ed20SBhawanpreet Lakha 442a193ed20SBhawanpreet Lakha mutex_lock(&hdcp_work->mutex); 443a193ed20SBhawanpreet Lakha 4442ebbe7c9SBhawanpreet Lakha cancel_delayed_work(&hdcp_work->watchdog_timer_dwork); 4452ebbe7c9SBhawanpreet Lakha 446a193ed20SBhawanpreet Lakha mod_hdcp_process_event(&hdcp_work->hdcp, 447a193ed20SBhawanpreet Lakha MOD_HDCP_EVENT_WATCHDOG_TIMEOUT, 448a193ed20SBhawanpreet Lakha &hdcp_work->output); 449a193ed20SBhawanpreet Lakha 450a193ed20SBhawanpreet Lakha process_output(hdcp_work); 451a193ed20SBhawanpreet Lakha 452a193ed20SBhawanpreet Lakha mutex_unlock(&hdcp_work->mutex); 453a193ed20SBhawanpreet Lakha 454a193ed20SBhawanpreet Lakha } 455a193ed20SBhawanpreet Lakha 456a193ed20SBhawanpreet Lakha static void event_cpirq(struct work_struct *work) 457a193ed20SBhawanpreet Lakha { 458a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_work; 459a193ed20SBhawanpreet Lakha 460a193ed20SBhawanpreet Lakha hdcp_work = container_of(work, struct hdcp_workqueue, cpirq_work); 461a193ed20SBhawanpreet Lakha 462a193ed20SBhawanpreet Lakha mutex_lock(&hdcp_work->mutex); 463a193ed20SBhawanpreet Lakha 464a193ed20SBhawanpreet Lakha mod_hdcp_process_event(&hdcp_work->hdcp, MOD_HDCP_EVENT_CPIRQ, &hdcp_work->output); 465a193ed20SBhawanpreet Lakha 466a193ed20SBhawanpreet Lakha process_output(hdcp_work); 467a193ed20SBhawanpreet Lakha 468a193ed20SBhawanpreet Lakha mutex_unlock(&hdcp_work->mutex); 469a193ed20SBhawanpreet Lakha 470a193ed20SBhawanpreet Lakha } 471a193ed20SBhawanpreet Lakha 472a193ed20SBhawanpreet Lakha 473e96b1b29SNirmoy Das void hdcp_destroy(struct kobject *kobj, struct hdcp_workqueue *hdcp_work) 474a193ed20SBhawanpreet Lakha { 475a193ed20SBhawanpreet Lakha int i = 0; 476a193ed20SBhawanpreet Lakha 477a193ed20SBhawanpreet Lakha for (i = 0; i < hdcp_work->max_link; i++) { 478a193ed20SBhawanpreet Lakha cancel_delayed_work_sync(&hdcp_work[i].callback_dwork); 479a193ed20SBhawanpreet Lakha cancel_delayed_work_sync(&hdcp_work[i].watchdog_timer_dwork); 480a193ed20SBhawanpreet Lakha } 481a193ed20SBhawanpreet Lakha 482e96b1b29SNirmoy Das sysfs_remove_bin_file(kobj, &hdcp_work[0].attr); 4839037246bSBhawanpreet Lakha kfree(hdcp_work->srm); 4849037246bSBhawanpreet Lakha kfree(hdcp_work->srm_temp); 485a193ed20SBhawanpreet Lakha kfree(hdcp_work); 486a193ed20SBhawanpreet Lakha } 487a193ed20SBhawanpreet Lakha 488ef9de187SBhawanpreet Lakha 489ef9de187SBhawanpreet Lakha static bool enable_assr(void *handle, struct dc_link *link) 490ef9de187SBhawanpreet Lakha { 491ef9de187SBhawanpreet Lakha 492ef9de187SBhawanpreet Lakha struct hdcp_workqueue *hdcp_work = handle; 493ef9de187SBhawanpreet Lakha struct mod_hdcp hdcp = hdcp_work->hdcp; 494ef9de187SBhawanpreet Lakha struct psp_context *psp = hdcp.config.psp.handle; 495ef9de187SBhawanpreet Lakha struct ta_dtm_shared_memory *dtm_cmd; 496ef9de187SBhawanpreet Lakha bool res = true; 497ef9de187SBhawanpreet Lakha 498ce97f37bSCandice Li if (!psp->dtm_context.context.initialized) { 499ef9de187SBhawanpreet Lakha DRM_INFO("Failed to enable ASSR, DTM TA is not initialized."); 500ef9de187SBhawanpreet Lakha return false; 501ef9de187SBhawanpreet Lakha } 502ef9de187SBhawanpreet Lakha 503ce97f37bSCandice Li dtm_cmd = (struct ta_dtm_shared_memory *)psp->dtm_context.context.mem_context.shared_buf; 504ef9de187SBhawanpreet Lakha 505ef9de187SBhawanpreet Lakha mutex_lock(&psp->dtm_context.mutex); 506ef9de187SBhawanpreet Lakha memset(dtm_cmd, 0, sizeof(struct ta_dtm_shared_memory)); 507ef9de187SBhawanpreet Lakha 508ef9de187SBhawanpreet Lakha dtm_cmd->cmd_id = TA_DTM_COMMAND__TOPOLOGY_ASSR_ENABLE; 509ef9de187SBhawanpreet Lakha dtm_cmd->dtm_in_message.topology_assr_enable.display_topology_dig_be_index = link->link_enc_hw_inst; 510ef9de187SBhawanpreet Lakha dtm_cmd->dtm_status = TA_DTM_STATUS__GENERIC_FAILURE; 511ef9de187SBhawanpreet Lakha 512ef9de187SBhawanpreet Lakha psp_dtm_invoke(psp, dtm_cmd->cmd_id); 513ef9de187SBhawanpreet Lakha 514ef9de187SBhawanpreet Lakha if (dtm_cmd->dtm_status != TA_DTM_STATUS__SUCCESS) { 515ef9de187SBhawanpreet Lakha DRM_INFO("Failed to enable ASSR"); 516ef9de187SBhawanpreet Lakha res = false; 517ef9de187SBhawanpreet Lakha } 518ef9de187SBhawanpreet Lakha 519ef9de187SBhawanpreet Lakha mutex_unlock(&psp->dtm_context.mutex); 520ef9de187SBhawanpreet Lakha 521ef9de187SBhawanpreet Lakha return res; 522ef9de187SBhawanpreet Lakha } 523ef9de187SBhawanpreet Lakha 524a193ed20SBhawanpreet Lakha static void update_config(void *handle, struct cp_psp_stream_config *config) 525a193ed20SBhawanpreet Lakha { 526a193ed20SBhawanpreet Lakha struct hdcp_workqueue *hdcp_work = handle; 527a193ed20SBhawanpreet Lakha struct amdgpu_dm_connector *aconnector = config->dm_stream_ctx; 528a193ed20SBhawanpreet Lakha int link_index = aconnector->dc_link->link_index; 529a193ed20SBhawanpreet Lakha struct mod_hdcp_display *display = &hdcp_work[link_index].display; 530a193ed20SBhawanpreet Lakha struct mod_hdcp_link *link = &hdcp_work[link_index].link; 53126739690SDingchen (David) Zhang struct drm_connector_state *conn_state; 5324d31819aSWayne Lin struct dc_sink *sink = NULL; 533035f5496SAurabindo Pillai bool link_is_hdcp14 = false; 534a193ed20SBhawanpreet Lakha 535a30a8c2fSBhawanpreet Lakha if (config->dpms_off) { 536a30a8c2fSBhawanpreet Lakha hdcp_remove_display(hdcp_work, link_index, aconnector); 537a30a8c2fSBhawanpreet Lakha return; 538a30a8c2fSBhawanpreet Lakha } 5393528cae9SLeo (Hanghong) Ma 5403528cae9SLeo (Hanghong) Ma memset(display, 0, sizeof(*display)); 5413528cae9SLeo (Hanghong) Ma memset(link, 0, sizeof(*link)); 5423528cae9SLeo (Hanghong) Ma 5433528cae9SLeo (Hanghong) Ma display->index = aconnector->base.index; 544a193ed20SBhawanpreet Lakha display->state = MOD_HDCP_DISPLAY_ACTIVE; 545a193ed20SBhawanpreet Lakha 5464d31819aSWayne Lin if (aconnector->dc_sink) 5474d31819aSWayne Lin sink = aconnector->dc_sink; 5484d31819aSWayne Lin else if (aconnector->dc_em_sink) 5494d31819aSWayne Lin sink = aconnector->dc_em_sink; 5504d31819aSWayne Lin 5514d31819aSWayne Lin if (sink != NULL) 5524d31819aSWayne Lin link->mode = mod_hdcp_signal_type_to_operation_mode(sink->sink_signal); 553a193ed20SBhawanpreet Lakha 554a193ed20SBhawanpreet Lakha display->controller = CONTROLLER_ID_D0 + config->otg_inst; 555aac6d439SWenjing Liu display->dig_fe = config->dig_fe; 556aac6d439SWenjing Liu link->dig_be = config->dig_be; 557a193ed20SBhawanpreet Lakha link->ddc_line = aconnector->dc_link->ddc_hw_inst + 1; 558bf62221eSNicholas Kazlauskas display->stream_enc_idx = config->stream_enc_idx; 559bf62221eSNicholas Kazlauskas link->link_enc_idx = config->link_enc_idx; 560f51d22b0SQingqing Zhuo link->dio_output_id = config->dio_output_idx; 561bf62221eSNicholas Kazlauskas link->phy_idx = config->phy_idx; 56210a36226SWayne Lin 5634d31819aSWayne Lin if (sink) 5644d31819aSWayne Lin link_is_hdcp14 = dc_link_is_hdcp14(aconnector->dc_link, sink->sink_signal); 565035f5496SAurabindo Pillai link->hdcp_supported_informational = link_is_hdcp14; 566a193ed20SBhawanpreet Lakha link->dp.rev = aconnector->dc_link->dpcd_caps.dpcd_rev.raw; 567aac6d439SWenjing Liu link->dp.assr_enabled = config->assr_enabled; 568aac6d439SWenjing Liu link->dp.mst_enabled = config->mst_enabled; 569f51d22b0SQingqing Zhuo link->dp.usb4_enabled = config->usb4_enabled; 5704fe1fdccSWenjing Liu display->adjust.disable = MOD_HDCP_DISPLAY_DISABLE_AUTHENTICATION; 57135fe1915SBhawanpreet Lakha link->adjust.auth_delay = 0; 572c2850c12SBhawanpreet Lakha link->adjust.hdcp1.disable = 0; 57326739690SDingchen (David) Zhang conn_state = aconnector->base.state; 574a193ed20SBhawanpreet Lakha 575caa18dd6SDingchen (David) Zhang DRM_DEBUG_DRIVER("[HDCP_DM] display %d, CP %d, type %d\n", aconnector->base.index, 57626739690SDingchen (David) Zhang (!!aconnector->base.state) ? aconnector->base.state->content_protection : -1, 57726739690SDingchen (David) Zhang (!!aconnector->base.state) ? aconnector->base.state->hdcp_content_type : -1); 57826739690SDingchen (David) Zhang 57972bb5030Shersen wu if (conn_state) 58072bb5030Shersen wu hdcp_update_display(hdcp_work, link_index, aconnector, 58172bb5030Shersen wu conn_state->hdcp_content_type, false); 582a193ed20SBhawanpreet Lakha } 583a193ed20SBhawanpreet Lakha 5849037246bSBhawanpreet Lakha 5859037246bSBhawanpreet Lakha /* NOTE: From the usermodes prospective you only need to call write *ONCE*, the kernel 5869037246bSBhawanpreet Lakha * will automatically call once or twice depending on the size 5879037246bSBhawanpreet Lakha * 5889037246bSBhawanpreet Lakha * call: "cat file > /sys/class/drm/card0/device/hdcp_srm" from usermode no matter what the size is 5899037246bSBhawanpreet Lakha * 5909037246bSBhawanpreet Lakha * The kernel can only send PAGE_SIZE at once and since MAX_SRM_FILE(5120) > PAGE_SIZE(4096), 5919037246bSBhawanpreet Lakha * srm_data_write can be called multiple times. 5929037246bSBhawanpreet Lakha * 5939037246bSBhawanpreet Lakha * sysfs interface doesn't tell us the size we will get so we are sending partial SRMs to psp and on 5949037246bSBhawanpreet Lakha * the last call we will send the full SRM. PSP will fail on every call before the last. 5959037246bSBhawanpreet Lakha * 5969037246bSBhawanpreet Lakha * This means we don't know if the SRM is good until the last call. And because of this limitation we 5979037246bSBhawanpreet Lakha * cannot throw errors early as it will stop the kernel from writing to sysfs 5989037246bSBhawanpreet Lakha * 5999037246bSBhawanpreet Lakha * Example 1: 6009037246bSBhawanpreet Lakha * Good SRM size = 5096 6019037246bSBhawanpreet Lakha * first call to write 4096 -> PSP fails 6029037246bSBhawanpreet Lakha * Second call to write 1000 -> PSP Pass -> SRM is set 6039037246bSBhawanpreet Lakha * 6049037246bSBhawanpreet Lakha * Example 2: 6059037246bSBhawanpreet Lakha * Bad SRM size = 4096 6069037246bSBhawanpreet Lakha * first call to write 4096 -> PSP fails (This is the same as above, but we don't know if this 6079037246bSBhawanpreet Lakha * is the last call) 6089037246bSBhawanpreet Lakha * 6099037246bSBhawanpreet Lakha * Solution?: 6109037246bSBhawanpreet Lakha * 1: Parse the SRM? -> It is signed so we don't know the EOF 6119037246bSBhawanpreet Lakha * 2: We can have another sysfs that passes the size before calling set. -> simpler solution 6129037246bSBhawanpreet Lakha * below 6139037246bSBhawanpreet Lakha * 6149037246bSBhawanpreet Lakha * Easy Solution: 6159037246bSBhawanpreet Lakha * Always call get after Set to verify if set was successful. 6169037246bSBhawanpreet Lakha * +----------------------+ 6179037246bSBhawanpreet Lakha * | Why it works: | 6189037246bSBhawanpreet Lakha * +----------------------+ 6199037246bSBhawanpreet Lakha * PSP will only update its srm if its older than the one we are trying to load. 6209037246bSBhawanpreet Lakha * Always do set first than get. 6219037246bSBhawanpreet Lakha * -if we try to "1. SET" a older version PSP will reject it and we can "2. GET" the newer 6229037246bSBhawanpreet Lakha * version and save it 6239037246bSBhawanpreet Lakha * 6249037246bSBhawanpreet Lakha * -if we try to "1. SET" a newer version PSP will accept it and we can "2. GET" the 6259037246bSBhawanpreet Lakha * same(newer) version back and save it 6269037246bSBhawanpreet Lakha * 6279037246bSBhawanpreet Lakha * -if we try to "1. SET" a newer version and PSP rejects it. That means the format is 6289037246bSBhawanpreet Lakha * incorrect/corrupted and we should correct our SRM by getting it from PSP 6299037246bSBhawanpreet Lakha */ 6309037246bSBhawanpreet Lakha static ssize_t srm_data_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buffer, 6319037246bSBhawanpreet Lakha loff_t pos, size_t count) 6329037246bSBhawanpreet Lakha { 6339037246bSBhawanpreet Lakha struct hdcp_workqueue *work; 6349037246bSBhawanpreet Lakha uint32_t srm_version = 0; 6359037246bSBhawanpreet Lakha 6369037246bSBhawanpreet Lakha work = container_of(bin_attr, struct hdcp_workqueue, attr); 6379037246bSBhawanpreet Lakha link_lock(work, true); 6389037246bSBhawanpreet Lakha 6399037246bSBhawanpreet Lakha memcpy(work->srm_temp + pos, buffer, count); 6409037246bSBhawanpreet Lakha 6419037246bSBhawanpreet Lakha if (!psp_set_srm(work->hdcp.config.psp.handle, work->srm_temp, pos + count, &srm_version)) { 6429037246bSBhawanpreet Lakha DRM_DEBUG_DRIVER("HDCP SRM SET version 0x%X", srm_version); 6439037246bSBhawanpreet Lakha memcpy(work->srm, work->srm_temp, pos + count); 6449037246bSBhawanpreet Lakha work->srm_size = pos + count; 6459037246bSBhawanpreet Lakha work->srm_version = srm_version; 6469037246bSBhawanpreet Lakha } 6479037246bSBhawanpreet Lakha 6489037246bSBhawanpreet Lakha 6499037246bSBhawanpreet Lakha link_lock(work, false); 6509037246bSBhawanpreet Lakha 6519037246bSBhawanpreet Lakha return count; 6529037246bSBhawanpreet Lakha } 6539037246bSBhawanpreet Lakha 6549037246bSBhawanpreet Lakha static ssize_t srm_data_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buffer, 6559037246bSBhawanpreet Lakha loff_t pos, size_t count) 6569037246bSBhawanpreet Lakha { 6579037246bSBhawanpreet Lakha struct hdcp_workqueue *work; 6589037246bSBhawanpreet Lakha uint8_t *srm = NULL; 6599037246bSBhawanpreet Lakha uint32_t srm_version; 6609037246bSBhawanpreet Lakha uint32_t srm_size; 6619037246bSBhawanpreet Lakha size_t ret = count; 6629037246bSBhawanpreet Lakha 6639037246bSBhawanpreet Lakha work = container_of(bin_attr, struct hdcp_workqueue, attr); 6649037246bSBhawanpreet Lakha 6659037246bSBhawanpreet Lakha link_lock(work, true); 6669037246bSBhawanpreet Lakha 6679037246bSBhawanpreet Lakha srm = psp_get_srm(work->hdcp.config.psp.handle, &srm_version, &srm_size); 6689037246bSBhawanpreet Lakha 6698ef51b42SJohn van der Kamp if (!srm) { 6708ef51b42SJohn van der Kamp ret = -EINVAL; 6718ef51b42SJohn van der Kamp goto ret; 6728ef51b42SJohn van der Kamp } 6739037246bSBhawanpreet Lakha 6749037246bSBhawanpreet Lakha if (pos >= srm_size) 6759037246bSBhawanpreet Lakha ret = 0; 6769037246bSBhawanpreet Lakha 6779037246bSBhawanpreet Lakha if (srm_size - pos < count) { 6789037246bSBhawanpreet Lakha memcpy(buffer, srm + pos, srm_size - pos); 6799037246bSBhawanpreet Lakha ret = srm_size - pos; 6809037246bSBhawanpreet Lakha goto ret; 6819037246bSBhawanpreet Lakha } 6829037246bSBhawanpreet Lakha 6839037246bSBhawanpreet Lakha memcpy(buffer, srm + pos, count); 6849037246bSBhawanpreet Lakha 6859037246bSBhawanpreet Lakha ret: 6869037246bSBhawanpreet Lakha link_lock(work, false); 6879037246bSBhawanpreet Lakha return ret; 6889037246bSBhawanpreet Lakha } 6899037246bSBhawanpreet Lakha 6909037246bSBhawanpreet Lakha /* From the hdcp spec (5.Renewability) SRM needs to be stored in a non-volatile memory. 6919037246bSBhawanpreet Lakha * 6929037246bSBhawanpreet Lakha * For example, 6939037246bSBhawanpreet Lakha * if Application "A" sets the SRM (ver 2) and we reboot/suspend and later when Application "B" 6949037246bSBhawanpreet Lakha * needs to use HDCP, the version in PSP should be SRM(ver 2). So SRM should be persistent 6959037246bSBhawanpreet Lakha * across boot/reboots/suspend/resume/shutdown 6969037246bSBhawanpreet Lakha * 6979037246bSBhawanpreet Lakha * Currently when the system goes down (suspend/shutdown) the SRM is cleared from PSP. For HDCP we need 6989037246bSBhawanpreet Lakha * to make the SRM persistent. 6999037246bSBhawanpreet Lakha * 7009037246bSBhawanpreet Lakha * -PSP owns the checking of SRM but doesn't have the ability to store it in a non-volatile memory. 7019037246bSBhawanpreet Lakha * -The kernel cannot write to the file systems. 7029037246bSBhawanpreet Lakha * -So we need usermode to do this for us, which is why an interface for usermode is needed 7039037246bSBhawanpreet Lakha * 7049037246bSBhawanpreet Lakha * 7059037246bSBhawanpreet Lakha * 7069037246bSBhawanpreet Lakha * Usermode can read/write to/from PSP using the sysfs interface 7079037246bSBhawanpreet Lakha * For example: 7089037246bSBhawanpreet Lakha * to save SRM from PSP to storage : cat /sys/class/drm/card0/device/hdcp_srm > srmfile 7099037246bSBhawanpreet Lakha * to load from storage to PSP: cat srmfile > /sys/class/drm/card0/device/hdcp_srm 7109037246bSBhawanpreet Lakha */ 7119037246bSBhawanpreet Lakha static const struct bin_attribute data_attr = { 7129037246bSBhawanpreet Lakha .attr = {.name = "hdcp_srm", .mode = 0664}, 7139037246bSBhawanpreet Lakha .size = PSP_HDCP_SRM_FIRST_GEN_MAX_SIZE, /* Limit SRM size */ 7149037246bSBhawanpreet Lakha .write = srm_data_write, 7159037246bSBhawanpreet Lakha .read = srm_data_read, 7169037246bSBhawanpreet Lakha }; 7179037246bSBhawanpreet Lakha 7189037246bSBhawanpreet Lakha 719e50dc171SBhawanpreet Lakha struct hdcp_workqueue *hdcp_create_workqueue(struct amdgpu_device *adev, struct cp_psp *cp_psp, struct dc *dc) 720a193ed20SBhawanpreet Lakha { 721a193ed20SBhawanpreet Lakha 722a193ed20SBhawanpreet Lakha int max_caps = dc->caps.max_links; 7239037246bSBhawanpreet Lakha struct hdcp_workqueue *hdcp_work; 724a193ed20SBhawanpreet Lakha int i = 0; 725a193ed20SBhawanpreet Lakha 7269037246bSBhawanpreet Lakha hdcp_work = kcalloc(max_caps, sizeof(*hdcp_work), GFP_KERNEL); 727898c7302SFlora Cui if (ZERO_OR_NULL_PTR(hdcp_work)) 7289037246bSBhawanpreet Lakha return NULL; 7299037246bSBhawanpreet Lakha 7309037246bSBhawanpreet Lakha hdcp_work->srm = kcalloc(PSP_HDCP_SRM_FIRST_GEN_MAX_SIZE, sizeof(*hdcp_work->srm), GFP_KERNEL); 7319037246bSBhawanpreet Lakha 7329037246bSBhawanpreet Lakha if (hdcp_work->srm == NULL) 7339037246bSBhawanpreet Lakha goto fail_alloc_context; 7349037246bSBhawanpreet Lakha 7359037246bSBhawanpreet Lakha hdcp_work->srm_temp = kcalloc(PSP_HDCP_SRM_FIRST_GEN_MAX_SIZE, sizeof(*hdcp_work->srm_temp), GFP_KERNEL); 7369037246bSBhawanpreet Lakha 7379037246bSBhawanpreet Lakha if (hdcp_work->srm_temp == NULL) 738a193ed20SBhawanpreet Lakha goto fail_alloc_context; 739a193ed20SBhawanpreet Lakha 740a193ed20SBhawanpreet Lakha hdcp_work->max_link = max_caps; 741a193ed20SBhawanpreet Lakha 742a193ed20SBhawanpreet Lakha for (i = 0; i < max_caps; i++) { 743a193ed20SBhawanpreet Lakha mutex_init(&hdcp_work[i].mutex); 744a193ed20SBhawanpreet Lakha 745a193ed20SBhawanpreet Lakha INIT_WORK(&hdcp_work[i].cpirq_work, event_cpirq); 746da3fd7acSBhawanpreet Lakha INIT_WORK(&hdcp_work[i].property_update_work, event_property_update); 747a193ed20SBhawanpreet Lakha INIT_DELAYED_WORK(&hdcp_work[i].callback_dwork, event_callback); 748a193ed20SBhawanpreet Lakha INIT_DELAYED_WORK(&hdcp_work[i].watchdog_timer_dwork, event_watchdog_timer); 749da3fd7acSBhawanpreet Lakha INIT_DELAYED_WORK(&hdcp_work[i].property_validate_dwork, event_property_validate); 750a193ed20SBhawanpreet Lakha 751e50dc171SBhawanpreet Lakha hdcp_work[i].hdcp.config.psp.handle = &adev->psp; 752de7cc1b4SPrike Liang if (dc->ctx->dce_version == DCN_VERSION_3_1 || 753e850f6b1SRoman Li dc->ctx->dce_version == DCN_VERSION_3_14 || 754b5b8ed44SQingqing Zhuo dc->ctx->dce_version == DCN_VERSION_3_15 || 755de7cc1b4SPrike Liang dc->ctx->dce_version == DCN_VERSION_3_16) 756bf62221eSNicholas Kazlauskas hdcp_work[i].hdcp.config.psp.caps.dtm_v3_supported = 1; 757a193ed20SBhawanpreet Lakha hdcp_work[i].hdcp.config.ddc.handle = dc_get_link_at_index(dc, i); 75855b50e68SBhawanpreet Lakha hdcp_work[i].hdcp.config.ddc.funcs.write_i2c = lp_write_i2c; 75955b50e68SBhawanpreet Lakha hdcp_work[i].hdcp.config.ddc.funcs.read_i2c = lp_read_i2c; 76055b50e68SBhawanpreet Lakha hdcp_work[i].hdcp.config.ddc.funcs.write_dpcd = lp_write_dpcd; 76155b50e68SBhawanpreet Lakha hdcp_work[i].hdcp.config.ddc.funcs.read_dpcd = lp_read_dpcd; 762*aa9fdd5dShersen wu 763*aa9fdd5dShersen wu memset(hdcp_work[i].aconnector, 0, 764*aa9fdd5dShersen wu sizeof(struct amdgpu_dm_connector *) * 765*aa9fdd5dShersen wu AMDGPU_DM_MAX_DISPLAY_INDEX); 766*aa9fdd5dShersen wu memset(hdcp_work[i].encryption_status, 0, 767*aa9fdd5dShersen wu sizeof(enum mod_hdcp_encryption_status) * 768*aa9fdd5dShersen wu AMDGPU_DM_MAX_DISPLAY_INDEX); 769a193ed20SBhawanpreet Lakha } 770a193ed20SBhawanpreet Lakha 771a193ed20SBhawanpreet Lakha cp_psp->funcs.update_stream_config = update_config; 772ef9de187SBhawanpreet Lakha cp_psp->funcs.enable_assr = enable_assr; 773a193ed20SBhawanpreet Lakha cp_psp->handle = hdcp_work; 774a193ed20SBhawanpreet Lakha 7759037246bSBhawanpreet Lakha /* File created at /sys/class/drm/card0/device/hdcp_srm*/ 7769037246bSBhawanpreet Lakha hdcp_work[0].attr = data_attr; 777fe1c97d0SDavid Ward sysfs_bin_attr_init(&hdcp_work[0].attr); 7789037246bSBhawanpreet Lakha 7799037246bSBhawanpreet Lakha if (sysfs_create_bin_file(&adev->dev->kobj, &hdcp_work[0].attr)) 7809037246bSBhawanpreet Lakha DRM_WARN("Failed to create device file hdcp_srm"); 7819037246bSBhawanpreet Lakha 782a193ed20SBhawanpreet Lakha return hdcp_work; 783a193ed20SBhawanpreet Lakha 784a193ed20SBhawanpreet Lakha fail_alloc_context: 7859037246bSBhawanpreet Lakha kfree(hdcp_work->srm); 7869037246bSBhawanpreet Lakha kfree(hdcp_work->srm_temp); 787a193ed20SBhawanpreet Lakha kfree(hdcp_work); 788a193ed20SBhawanpreet Lakha 789a193ed20SBhawanpreet Lakha return NULL; 790a193ed20SBhawanpreet Lakha 791a193ed20SBhawanpreet Lakha 792a193ed20SBhawanpreet Lakha 793a193ed20SBhawanpreet Lakha } 794a193ed20SBhawanpreet Lakha 795a193ed20SBhawanpreet Lakha 796a193ed20SBhawanpreet Lakha 797