Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2015-2016, 2018, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 14 | |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/io.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/stat.h> |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/kthread.h> |
| 21 | |
| 22 | #include <linux/hdcp_qseecom.h> |
| 23 | #include "mdss_hdmi_hdcp.h" |
| 24 | #include "video/msm_hdmi_hdcp_mgr.h" |
| 25 | #include "mdss_hdmi_util.h" |
| 26 | |
| 27 | /* |
| 28 | * Defined addresses and offsets of standard HDCP 2.2 sink registers |
| 29 | * for DDC, as defined in HDCP 2.2 spec section 2.14 table 2.7 |
| 30 | */ |
| 31 | #define HDCP_SINK_DDC_SLAVE_ADDR 0x74 /* Sink DDC slave address */ |
| 32 | #define HDCP_SINK_DDC_HDCP2_VERSION 0x50 /* Does sink support HDCP2.2 */ |
| 33 | #define HDCP_SINK_DDC_HDCP2_WRITE_MESSAGE 0x60 /* HDCP Tx writes here */ |
| 34 | #define HDCP_SINK_DDC_HDCP2_RXSTATUS 0x70 /* RxStatus, 2 bytes */ |
| 35 | #define HDCP_SINK_DDC_HDCP2_READ_MESSAGE 0x80 /* HDCP Tx reads here */ |
| 36 | |
| 37 | #define HDCP2P2_DEFAULT_TIMEOUT 500 |
| 38 | |
| 39 | /* |
| 40 | * HDCP 2.2 encryption requires the data encryption block that is present in |
| 41 | * HDMI controller version 4.0.0 and above |
| 42 | */ |
| 43 | #define MIN_HDMI_TX_MAJOR_VERSION 4 |
| 44 | |
| 45 | enum hdmi_hdcp2p2_sink_status { |
| 46 | SINK_DISCONNECTED, |
| 47 | SINK_CONNECTED |
| 48 | }; |
| 49 | |
| 50 | enum hdmi_auth_status { |
| 51 | HDMI_HDCP_AUTH_STATUS_FAILURE, |
| 52 | HDMI_HDCP_AUTH_STATUS_SUCCESS |
| 53 | }; |
| 54 | |
| 55 | struct hdmi_hdcp2p2_ctrl { |
| 56 | atomic_t auth_state; |
| 57 | bool tethered; |
| 58 | enum hdmi_hdcp2p2_sink_status sink_status; /* Is sink connected */ |
| 59 | struct hdmi_hdcp_init_data init_data; /* Feature data from HDMI drv */ |
| 60 | struct mutex mutex; /* mutex to protect access to ctrl */ |
| 61 | struct mutex msg_lock; /* mutex to protect access to msg buffer */ |
| 62 | struct mutex wakeup_mutex; /* mutex to protect access to wakeup call*/ |
| 63 | struct hdmi_hdcp_ops *ops; |
| 64 | void *lib_ctx; /* Handle to HDCP 2.2 Trustzone library */ |
| 65 | struct hdcp_txmtr_ops *lib; /* Ops for driver to call into TZ */ |
| 66 | |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 67 | enum hdcp_wakeup_cmd wakeup_cmd; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 68 | enum hdmi_auth_status auth_status; |
| 69 | char *send_msg_buf; |
| 70 | uint32_t send_msg_len; |
| 71 | uint32_t timeout; |
| 72 | uint32_t timeout_left; |
| 73 | |
| 74 | struct task_struct *thread; |
| 75 | struct kthread_worker worker; |
| 76 | struct kthread_work status; |
| 77 | struct kthread_work auth; |
| 78 | struct kthread_work send_msg; |
| 79 | struct kthread_work recv_msg; |
| 80 | struct kthread_work link; |
| 81 | struct kthread_work poll; |
| 82 | }; |
| 83 | |
| 84 | static int hdmi_hdcp2p2_auth(struct hdmi_hdcp2p2_ctrl *ctrl); |
| 85 | static void hdmi_hdcp2p2_send_msg(struct hdmi_hdcp2p2_ctrl *ctrl); |
| 86 | static void hdmi_hdcp2p2_recv_msg(struct hdmi_hdcp2p2_ctrl *ctrl); |
| 87 | static void hdmi_hdcp2p2_auth_status(struct hdmi_hdcp2p2_ctrl *ctrl); |
| 88 | static int hdmi_hdcp2p2_link_check(struct hdmi_hdcp2p2_ctrl *ctrl); |
| 89 | |
| 90 | static inline bool hdmi_hdcp2p2_is_valid_state(struct hdmi_hdcp2p2_ctrl *ctrl) |
| 91 | { |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 92 | if (ctrl->wakeup_cmd == HDCP_WKUP_CMD_AUTHENTICATE) |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 93 | return true; |
| 94 | |
| 95 | if (atomic_read(&ctrl->auth_state) != HDCP_STATE_INACTIVE) |
| 96 | return true; |
| 97 | |
| 98 | return false; |
| 99 | } |
| 100 | |
| 101 | static int hdmi_hdcp2p2_copy_buf(struct hdmi_hdcp2p2_ctrl *ctrl, |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 102 | struct hdcp_wakeup_data *data) |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 103 | { |
| 104 | mutex_lock(&ctrl->msg_lock); |
| 105 | |
| 106 | if (!data->send_msg_len) { |
| 107 | mutex_unlock(&ctrl->msg_lock); |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | ctrl->send_msg_len = data->send_msg_len; |
| 112 | |
| 113 | kzfree(ctrl->send_msg_buf); |
| 114 | |
| 115 | ctrl->send_msg_buf = kzalloc(data->send_msg_len, GFP_KERNEL); |
| 116 | |
| 117 | if (!ctrl->send_msg_buf) { |
| 118 | mutex_unlock(&ctrl->msg_lock); |
| 119 | return -ENOMEM; |
| 120 | } |
| 121 | |
| 122 | memcpy(ctrl->send_msg_buf, data->send_msg_buf, ctrl->send_msg_len); |
| 123 | |
| 124 | mutex_unlock(&ctrl->msg_lock); |
| 125 | |
| 126 | return 0; |
| 127 | } |
| 128 | |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 129 | static int hdmi_hdcp2p2_wakeup(struct hdcp_wakeup_data *data) |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 130 | { |
| 131 | struct hdmi_hdcp2p2_ctrl *ctrl; |
| 132 | |
| 133 | if (!data) { |
| 134 | pr_err("invalid input\n"); |
| 135 | return -EINVAL; |
| 136 | } |
| 137 | |
| 138 | ctrl = data->context; |
| 139 | if (!ctrl) { |
| 140 | pr_err("invalid ctrl\n"); |
| 141 | return -EINVAL; |
| 142 | } |
| 143 | |
| 144 | mutex_lock(&ctrl->wakeup_mutex); |
| 145 | |
| 146 | pr_debug("cmd: %s, timeout %dms, tethered %d\n", |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 147 | hdcp_cmd_to_str(data->cmd), |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 148 | data->timeout, ctrl->tethered); |
| 149 | |
| 150 | ctrl->wakeup_cmd = data->cmd; |
| 151 | |
| 152 | if (data->timeout) |
| 153 | ctrl->timeout = data->timeout * 2; |
| 154 | else |
| 155 | ctrl->timeout = HDCP2P2_DEFAULT_TIMEOUT; |
| 156 | |
| 157 | if (!hdmi_hdcp2p2_is_valid_state(ctrl)) { |
| 158 | pr_err("invalid state\n"); |
| 159 | goto exit; |
| 160 | } |
| 161 | |
| 162 | if (hdmi_hdcp2p2_copy_buf(ctrl, data)) |
| 163 | goto exit; |
| 164 | |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 165 | if (ctrl->wakeup_cmd == HDCP_WKUP_CMD_STATUS_SUCCESS) |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 166 | ctrl->auth_status = HDMI_HDCP_AUTH_STATUS_SUCCESS; |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 167 | else if (ctrl->wakeup_cmd == HDCP_WKUP_CMD_STATUS_FAILED) |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 168 | ctrl->auth_status = HDMI_HDCP_AUTH_STATUS_FAILURE; |
| 169 | |
| 170 | if (ctrl->tethered) |
| 171 | goto exit; |
| 172 | |
| 173 | switch (ctrl->wakeup_cmd) { |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 174 | case HDCP_WKUP_CMD_SEND_MESSAGE: |
| 175 | kthread_queue_work(&ctrl->worker, &ctrl->send_msg); |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 176 | break; |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 177 | case HDCP_WKUP_CMD_RECV_MESSAGE: |
| 178 | kthread_queue_work(&ctrl->worker, &ctrl->recv_msg); |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 179 | break; |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 180 | case HDCP_WKUP_CMD_STATUS_SUCCESS: |
| 181 | case HDCP_WKUP_CMD_STATUS_FAILED: |
| 182 | kthread_queue_work(&ctrl->worker, &ctrl->status); |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 183 | break; |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 184 | case HDCP_WKUP_CMD_LINK_POLL: |
| 185 | kthread_queue_work(&ctrl->worker, &ctrl->poll); |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 186 | break; |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 187 | case HDCP_WKUP_CMD_AUTHENTICATE: |
| 188 | kthread_queue_work(&ctrl->worker, &ctrl->auth); |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 189 | break; |
| 190 | default: |
| 191 | pr_err("invalid wakeup command %d\n", ctrl->wakeup_cmd); |
| 192 | } |
| 193 | exit: |
| 194 | mutex_unlock(&ctrl->wakeup_mutex); |
| 195 | return 0; |
| 196 | } |
| 197 | |
| 198 | static inline int hdmi_hdcp2p2_wakeup_lib(struct hdmi_hdcp2p2_ctrl *ctrl, |
| 199 | struct hdcp_lib_wakeup_data *data) |
| 200 | { |
| 201 | int rc = 0; |
| 202 | |
| 203 | if (ctrl && ctrl->lib && ctrl->lib->wakeup && |
| 204 | data && (data->cmd != HDCP_LIB_WKUP_CMD_INVALID)) { |
| 205 | rc = ctrl->lib->wakeup(data); |
| 206 | if (rc) |
| 207 | pr_err("error sending %s to lib\n", |
| 208 | hdcp_lib_cmd_to_str(data->cmd)); |
| 209 | } |
| 210 | |
| 211 | return rc; |
| 212 | } |
| 213 | |
| 214 | static void hdmi_hdcp2p2_run(struct hdmi_hdcp2p2_ctrl *ctrl) |
| 215 | { |
| 216 | if (!ctrl) { |
| 217 | pr_err("invalid input\n"); |
| 218 | return; |
| 219 | } |
| 220 | |
| 221 | while (1) { |
| 222 | switch (ctrl->wakeup_cmd) { |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 223 | case HDCP_WKUP_CMD_SEND_MESSAGE: |
| 224 | ctrl->wakeup_cmd = HDCP_WKUP_CMD_INVALID; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 225 | hdmi_hdcp2p2_send_msg(ctrl); |
| 226 | break; |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 227 | case HDCP_WKUP_CMD_RECV_MESSAGE: |
| 228 | ctrl->wakeup_cmd = HDCP_WKUP_CMD_INVALID; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 229 | hdmi_hdcp2p2_recv_msg(ctrl); |
| 230 | break; |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 231 | case HDCP_WKUP_CMD_STATUS_SUCCESS: |
| 232 | case HDCP_WKUP_CMD_STATUS_FAILED: |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 233 | hdmi_hdcp2p2_auth_status(ctrl); |
| 234 | goto exit; |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 235 | case HDCP_WKUP_CMD_LINK_POLL: |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 236 | hdmi_hdcp2p2_link_check(ctrl); |
| 237 | goto exit; |
| 238 | default: |
| 239 | goto exit; |
| 240 | } |
| 241 | } |
| 242 | exit: |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 243 | ctrl->wakeup_cmd = HDCP_WKUP_CMD_INVALID; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | int hdmi_hdcp2p2_authenticate_tethered(struct hdmi_hdcp2p2_ctrl *ctrl) |
| 247 | { |
| 248 | int rc = 0; |
| 249 | |
| 250 | if (!ctrl) { |
| 251 | pr_err("invalid input\n"); |
| 252 | rc = -EINVAL; |
| 253 | goto exit; |
| 254 | } |
| 255 | |
| 256 | rc = hdmi_hdcp2p2_auth(ctrl); |
| 257 | if (rc) { |
| 258 | pr_err("auth failed %d\n", rc); |
| 259 | goto exit; |
| 260 | } |
| 261 | |
| 262 | hdmi_hdcp2p2_run(ctrl); |
| 263 | exit: |
| 264 | return rc; |
| 265 | } |
| 266 | |
| 267 | static void hdmi_hdcp2p2_reset(struct hdmi_hdcp2p2_ctrl *ctrl) |
| 268 | { |
| 269 | if (!ctrl) { |
| 270 | pr_err("invalid input\n"); |
| 271 | return; |
| 272 | } |
| 273 | |
| 274 | ctrl->sink_status = SINK_DISCONNECTED; |
| 275 | atomic_set(&ctrl->auth_state, HDCP_STATE_INACTIVE); |
| 276 | } |
| 277 | |
| 278 | static void hdmi_hdcp2p2_off(void *input) |
| 279 | { |
| 280 | struct hdmi_hdcp2p2_ctrl *ctrl = (struct hdmi_hdcp2p2_ctrl *)input; |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 281 | struct hdcp_wakeup_data cdata = {HDCP_WKUP_CMD_AUTHENTICATE}; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 282 | |
| 283 | if (!ctrl) { |
| 284 | pr_err("invalid input\n"); |
| 285 | return; |
| 286 | } |
| 287 | |
| 288 | hdmi_hdcp2p2_reset(ctrl); |
| 289 | |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 290 | kthread_flush_worker(&ctrl->worker); |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 291 | |
| 292 | hdmi_hdcp2p2_ddc_disable(ctrl->init_data.ddc_ctrl); |
| 293 | |
| 294 | if (ctrl->tethered) { |
| 295 | hdmi_hdcp2p2_auth(ctrl); |
| 296 | } else { |
| 297 | cdata.context = input; |
| 298 | hdmi_hdcp2p2_wakeup(&cdata); |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | static int hdmi_hdcp2p2_authenticate(void *input) |
| 303 | { |
| 304 | struct hdmi_hdcp2p2_ctrl *ctrl = input; |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 305 | struct hdcp_wakeup_data cdata = {HDCP_WKUP_CMD_AUTHENTICATE}; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 306 | u32 regval; |
| 307 | int rc = 0; |
| 308 | |
| 309 | /* Enable authentication success interrupt */ |
| 310 | regval = DSS_REG_R(ctrl->init_data.core_io, HDMI_HDCP_INT_CTRL2); |
| 311 | regval |= BIT(1) | BIT(2); |
| 312 | |
| 313 | DSS_REG_W(ctrl->init_data.core_io, HDMI_HDCP_INT_CTRL2, regval); |
| 314 | |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 315 | kthread_flush_worker(&ctrl->worker); |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 316 | |
| 317 | ctrl->sink_status = SINK_CONNECTED; |
| 318 | atomic_set(&ctrl->auth_state, HDCP_STATE_AUTHENTICATING); |
| 319 | |
| 320 | /* make sure ddc is idle before starting hdcp 2.2 authentication */ |
| 321 | hdmi_scrambler_ddc_disable(ctrl->init_data.ddc_ctrl); |
| 322 | hdmi_hdcp2p2_ddc_disable(ctrl->init_data.ddc_ctrl); |
| 323 | |
| 324 | if (ctrl->tethered) { |
| 325 | hdmi_hdcp2p2_authenticate_tethered(ctrl); |
| 326 | } else { |
| 327 | cdata.context = input; |
| 328 | hdmi_hdcp2p2_wakeup(&cdata); |
| 329 | } |
| 330 | |
| 331 | return rc; |
| 332 | } |
| 333 | |
| 334 | static int hdmi_hdcp2p2_reauthenticate(void *input) |
| 335 | { |
| 336 | struct hdmi_hdcp2p2_ctrl *ctrl = (struct hdmi_hdcp2p2_ctrl *)input; |
| 337 | |
| 338 | if (!ctrl) { |
| 339 | pr_err("invalid input\n"); |
| 340 | return -EINVAL; |
| 341 | } |
| 342 | |
| 343 | hdmi_hdcp2p2_reset((struct hdmi_hdcp2p2_ctrl *)input); |
| 344 | |
| 345 | return hdmi_hdcp2p2_authenticate(input); |
| 346 | } |
| 347 | |
| 348 | static ssize_t hdmi_hdcp2p2_sysfs_rda_tethered(struct device *dev, |
| 349 | struct device_attribute *attr, char *buf) |
| 350 | { |
| 351 | ssize_t ret; |
| 352 | struct hdmi_hdcp2p2_ctrl *ctrl = |
| 353 | hdmi_get_featuredata_from_sysfs_dev(dev, HDMI_TX_FEAT_HDCP2P2); |
| 354 | |
| 355 | if (!ctrl) { |
| 356 | pr_err("invalid input\n"); |
| 357 | return -EINVAL; |
| 358 | } |
| 359 | |
| 360 | mutex_lock(&ctrl->mutex); |
| 361 | ret = snprintf(buf, PAGE_SIZE, "%d\n", ctrl->tethered); |
| 362 | mutex_unlock(&ctrl->mutex); |
| 363 | |
| 364 | return ret; |
| 365 | } |
| 366 | |
| 367 | static ssize_t hdmi_hdcp2p2_sysfs_wta_tethered(struct device *dev, |
| 368 | struct device_attribute *attr, const char *buf, size_t count) |
| 369 | { |
| 370 | struct hdmi_hdcp2p2_ctrl *ctrl = |
| 371 | hdmi_get_featuredata_from_sysfs_dev(dev, HDMI_TX_FEAT_HDCP2P2); |
| 372 | int rc, tethered; |
| 373 | |
| 374 | if (!ctrl) { |
| 375 | pr_err("invalid input\n"); |
| 376 | return -EINVAL; |
| 377 | } |
| 378 | |
| 379 | mutex_lock(&ctrl->mutex); |
| 380 | rc = kstrtoint(buf, 10, &tethered); |
| 381 | if (rc) { |
| 382 | pr_err("kstrtoint failed. rc=%d\n", rc); |
| 383 | goto exit; |
| 384 | } |
| 385 | |
| 386 | ctrl->tethered = !!tethered; |
| 387 | |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 388 | //if (ctrl->lib && ctrl->lib->update_exec_type && ctrl->lib_ctx) |
| 389 | // ctrl->lib->update_exec_type(ctrl->lib_ctx, ctrl->tethered); |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 390 | exit: |
| 391 | mutex_unlock(&ctrl->mutex); |
| 392 | |
| 393 | return count; |
| 394 | } |
| 395 | |
| 396 | static ssize_t hdmi_hdcp2p2_sysfs_wta_min_level_change(struct device *dev, |
| 397 | struct device_attribute *attr, const char *buf, size_t count) |
| 398 | { |
| 399 | struct hdmi_hdcp2p2_ctrl *ctrl = |
| 400 | hdmi_get_featuredata_from_sysfs_dev(dev, HDMI_TX_FEAT_HDCP2P2); |
| 401 | struct hdcp_lib_wakeup_data cdata = { |
| 402 | HDCP_LIB_WKUP_CMD_QUERY_STREAM_TYPE}; |
| 403 | bool enc_notify = true; |
| 404 | enum hdmi_hdcp_state enc_lvl; |
| 405 | int min_enc_lvl; |
| 406 | int rc; |
| 407 | |
| 408 | if (!ctrl) { |
| 409 | pr_err("invalid input\n"); |
| 410 | rc = -EINVAL; |
| 411 | goto exit; |
| 412 | } |
| 413 | |
| 414 | rc = kstrtoint(buf, 10, &min_enc_lvl); |
| 415 | if (rc) { |
| 416 | DEV_ERR("%s: kstrtoint failed. rc=%d\n", __func__, rc); |
| 417 | goto exit; |
| 418 | } |
| 419 | |
| 420 | switch (min_enc_lvl) { |
| 421 | case 0: |
| 422 | enc_lvl = HDCP_STATE_AUTH_ENC_NONE; |
| 423 | break; |
| 424 | case 1: |
| 425 | enc_lvl = HDCP_STATE_AUTH_ENC_1X; |
| 426 | break; |
| 427 | case 2: |
| 428 | enc_lvl = HDCP_STATE_AUTH_ENC_2P2; |
| 429 | break; |
| 430 | default: |
| 431 | enc_notify = false; |
| 432 | } |
| 433 | |
| 434 | pr_debug("enc level changed %d\n", min_enc_lvl); |
| 435 | |
| 436 | cdata.context = ctrl->lib_ctx; |
| 437 | hdmi_hdcp2p2_wakeup_lib(ctrl, &cdata); |
| 438 | |
| 439 | if (ctrl->tethered) |
| 440 | hdmi_hdcp2p2_run(ctrl); |
| 441 | |
| 442 | if (enc_notify && ctrl->init_data.notify_status) |
| 443 | ctrl->init_data.notify_status(ctrl->init_data.cb_data, enc_lvl); |
| 444 | |
| 445 | rc = count; |
| 446 | exit: |
| 447 | return rc; |
| 448 | } |
| 449 | |
| 450 | static void hdmi_hdcp2p2_auth_failed(struct hdmi_hdcp2p2_ctrl *ctrl) |
| 451 | { |
| 452 | if (!ctrl) { |
| 453 | pr_err("invalid input\n"); |
| 454 | return; |
| 455 | } |
| 456 | |
| 457 | atomic_set(&ctrl->auth_state, HDCP_STATE_AUTH_FAIL); |
| 458 | |
| 459 | hdmi_hdcp2p2_ddc_disable(ctrl->init_data.ddc_ctrl); |
| 460 | |
| 461 | /* notify hdmi tx about HDCP failure */ |
| 462 | ctrl->init_data.notify_status(ctrl->init_data.cb_data, |
| 463 | HDCP_STATE_AUTH_FAIL); |
| 464 | } |
| 465 | |
| 466 | static int hdmi_hdcp2p2_ddc_read_message(struct hdmi_hdcp2p2_ctrl *ctrl, |
| 467 | u8 *buf, int size, u32 timeout) |
| 468 | { |
| 469 | struct hdmi_tx_ddc_data ddc_data; |
| 470 | int rc; |
| 471 | |
| 472 | if (atomic_read(&ctrl->auth_state) == HDCP_STATE_INACTIVE) { |
| 473 | pr_err("hdcp is off\n"); |
| 474 | return -EINVAL; |
| 475 | } |
| 476 | |
| 477 | memset(&ddc_data, 0, sizeof(ddc_data)); |
| 478 | ddc_data.dev_addr = HDCP_SINK_DDC_SLAVE_ADDR; |
| 479 | ddc_data.offset = HDCP_SINK_DDC_HDCP2_READ_MESSAGE; |
| 480 | ddc_data.data_buf = buf; |
| 481 | ddc_data.data_len = size; |
| 482 | ddc_data.request_len = size; |
| 483 | ddc_data.retry = 0; |
| 484 | ddc_data.hard_timeout = timeout; |
| 485 | ddc_data.what = "HDCP2ReadMessage"; |
| 486 | |
| 487 | ctrl->init_data.ddc_ctrl->ddc_data = ddc_data; |
| 488 | |
| 489 | pr_debug("read msg timeout %dms\n", timeout); |
| 490 | |
| 491 | rc = hdmi_ddc_read(ctrl->init_data.ddc_ctrl); |
| 492 | if (rc) |
| 493 | pr_err("Cannot read HDCP message register\n"); |
| 494 | |
| 495 | ctrl->timeout_left = ctrl->init_data.ddc_ctrl->ddc_data.timeout_left; |
| 496 | |
| 497 | return rc; |
| 498 | } |
| 499 | |
| 500 | int hdmi_hdcp2p2_ddc_write_message(struct hdmi_hdcp2p2_ctrl *ctrl, |
| 501 | u8 *buf, size_t size) |
| 502 | { |
| 503 | struct hdmi_tx_ddc_data ddc_data; |
| 504 | int rc; |
| 505 | |
| 506 | memset(&ddc_data, 0, sizeof(ddc_data)); |
| 507 | ddc_data.dev_addr = HDCP_SINK_DDC_SLAVE_ADDR; |
| 508 | ddc_data.offset = HDCP_SINK_DDC_HDCP2_WRITE_MESSAGE; |
| 509 | ddc_data.data_buf = buf; |
| 510 | ddc_data.data_len = size; |
| 511 | ddc_data.hard_timeout = ctrl->timeout; |
| 512 | ddc_data.what = "HDCP2WriteMessage"; |
| 513 | |
| 514 | ctrl->init_data.ddc_ctrl->ddc_data = ddc_data; |
| 515 | |
| 516 | rc = hdmi_ddc_write(ctrl->init_data.ddc_ctrl); |
| 517 | if (rc) |
| 518 | pr_err("Cannot write HDCP message register\n"); |
| 519 | |
| 520 | ctrl->timeout_left = ctrl->init_data.ddc_ctrl->ddc_data.timeout_left; |
| 521 | |
| 522 | return rc; |
| 523 | } |
| 524 | |
| 525 | static int hdmi_hdcp2p2_read_version(struct hdmi_hdcp2p2_ctrl *ctrl, |
| 526 | u8 *hdcp2version) |
| 527 | { |
| 528 | struct hdmi_tx_ddc_data ddc_data; |
| 529 | int rc; |
| 530 | |
| 531 | memset(&ddc_data, 0, sizeof(ddc_data)); |
| 532 | ddc_data.dev_addr = HDCP_SINK_DDC_SLAVE_ADDR; |
| 533 | ddc_data.offset = HDCP_SINK_DDC_HDCP2_VERSION; |
| 534 | ddc_data.data_buf = hdcp2version; |
| 535 | ddc_data.data_len = 1; |
| 536 | ddc_data.request_len = 1; |
| 537 | ddc_data.retry = 1; |
| 538 | ddc_data.what = "HDCP2Version"; |
| 539 | |
| 540 | ctrl->init_data.ddc_ctrl->ddc_data = ddc_data; |
| 541 | |
| 542 | rc = hdmi_ddc_read(ctrl->init_data.ddc_ctrl); |
| 543 | if (rc) { |
| 544 | pr_err("Cannot read HDCP2Version register"); |
| 545 | return rc; |
| 546 | } |
| 547 | |
| 548 | pr_debug("Read HDCP2Version as %u\n", *hdcp2version); |
| 549 | return rc; |
| 550 | } |
| 551 | |
| 552 | static DEVICE_ATTR(min_level_change, 0200, NULL, |
| 553 | hdmi_hdcp2p2_sysfs_wta_min_level_change); |
| 554 | static DEVICE_ATTR(tethered, 0644, hdmi_hdcp2p2_sysfs_rda_tethered, |
| 555 | hdmi_hdcp2p2_sysfs_wta_tethered); |
| 556 | |
| 557 | static struct attribute *hdmi_hdcp2p2_fs_attrs[] = { |
| 558 | &dev_attr_min_level_change.attr, |
| 559 | &dev_attr_tethered.attr, |
| 560 | NULL, |
| 561 | }; |
| 562 | |
| 563 | static struct attribute_group hdmi_hdcp2p2_fs_attr_group = { |
| 564 | .name = "hdcp2p2", |
| 565 | .attrs = hdmi_hdcp2p2_fs_attrs, |
| 566 | }; |
| 567 | |
| 568 | static bool hdmi_hdcp2p2_feature_supported(void *input) |
| 569 | { |
| 570 | struct hdmi_hdcp2p2_ctrl *ctrl = input; |
| 571 | struct hdcp_txmtr_ops *lib = NULL; |
| 572 | bool supported = false; |
| 573 | |
| 574 | if (!ctrl) { |
| 575 | pr_err("invalid input\n"); |
| 576 | goto end; |
| 577 | } |
| 578 | |
| 579 | lib = ctrl->lib; |
| 580 | if (!lib) { |
| 581 | pr_err("invalid lib ops data\n"); |
| 582 | goto end; |
| 583 | } |
| 584 | |
| 585 | if (lib->feature_supported) |
| 586 | supported = lib->feature_supported( |
| 587 | ctrl->lib_ctx); |
| 588 | end: |
| 589 | return supported; |
| 590 | } |
| 591 | |
| 592 | static void hdmi_hdcp2p2_send_msg(struct hdmi_hdcp2p2_ctrl *ctrl) |
| 593 | { |
| 594 | int rc = 0; |
| 595 | struct hdcp_lib_wakeup_data cdata = {HDCP_LIB_WKUP_CMD_INVALID}; |
| 596 | uint32_t msglen; |
| 597 | char *msg = NULL; |
| 598 | |
| 599 | if (!ctrl) { |
| 600 | pr_err("invalid input\n"); |
| 601 | rc = -EINVAL; |
| 602 | goto exit; |
| 603 | } |
| 604 | |
| 605 | cdata.context = ctrl->lib_ctx; |
| 606 | |
| 607 | if (atomic_read(&ctrl->auth_state) == HDCP_STATE_INACTIVE) { |
| 608 | pr_err("hdcp is off\n"); |
| 609 | goto exit; |
| 610 | } |
| 611 | |
| 612 | mutex_lock(&ctrl->msg_lock); |
| 613 | msglen = ctrl->send_msg_len; |
| 614 | |
| 615 | if (!msglen) { |
| 616 | mutex_unlock(&ctrl->msg_lock); |
| 617 | rc = -EINVAL; |
| 618 | goto exit; |
| 619 | } |
| 620 | |
| 621 | msg = kzalloc(msglen, GFP_KERNEL); |
| 622 | if (!msg) { |
| 623 | mutex_unlock(&ctrl->msg_lock); |
| 624 | rc = -ENOMEM; |
| 625 | goto exit; |
| 626 | } |
| 627 | |
| 628 | memcpy(msg, ctrl->send_msg_buf, msglen); |
| 629 | mutex_unlock(&ctrl->msg_lock); |
| 630 | |
| 631 | /* Forward the message to the sink */ |
| 632 | rc = hdmi_hdcp2p2_ddc_write_message(ctrl, msg, (size_t)msglen); |
| 633 | if (rc) { |
| 634 | pr_err("Error sending msg to sink %d\n", rc); |
| 635 | cdata.cmd = HDCP_LIB_WKUP_CMD_MSG_SEND_FAILED; |
| 636 | } else { |
| 637 | cdata.cmd = HDCP_LIB_WKUP_CMD_MSG_SEND_SUCCESS; |
| 638 | cdata.timeout = ctrl->timeout_left; |
| 639 | } |
| 640 | exit: |
| 641 | kfree(msg); |
| 642 | |
| 643 | hdmi_hdcp2p2_wakeup_lib(ctrl, &cdata); |
| 644 | } |
| 645 | |
| 646 | static void hdmi_hdcp2p2_send_msg_work(struct kthread_work *work) |
| 647 | { |
| 648 | struct hdmi_hdcp2p2_ctrl *ctrl = container_of(work, |
| 649 | struct hdmi_hdcp2p2_ctrl, send_msg); |
| 650 | |
| 651 | hdmi_hdcp2p2_send_msg(ctrl); |
| 652 | } |
| 653 | |
| 654 | static void hdmi_hdcp2p2_link_cb(void *data) |
| 655 | { |
| 656 | struct hdmi_hdcp2p2_ctrl *ctrl = data; |
| 657 | |
| 658 | if (!ctrl) { |
| 659 | pr_debug("invalid input\n"); |
| 660 | return; |
| 661 | } |
| 662 | |
| 663 | if (atomic_read(&ctrl->auth_state) != HDCP_STATE_INACTIVE) |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 664 | kthread_queue_work(&ctrl->worker, &ctrl->link); |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 665 | } |
| 666 | |
| 667 | static void hdmi_hdcp2p2_recv_msg(struct hdmi_hdcp2p2_ctrl *ctrl) |
| 668 | { |
Krishna Manikandan | 8120dfc | 2016-11-28 17:52:45 +0530 | [diff] [blame] | 669 | int timeout_hsync = 0, rc = 0; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 670 | char *recvd_msg_buf = NULL; |
| 671 | struct hdmi_tx_hdcp2p2_ddc_data *ddc_data; |
| 672 | struct hdmi_tx_ddc_ctrl *ddc_ctrl; |
| 673 | struct hdcp_lib_wakeup_data cdata = {HDCP_LIB_WKUP_CMD_INVALID}; |
| 674 | |
| 675 | if (!ctrl) { |
| 676 | pr_err("invalid input\n"); |
| 677 | rc = -EINVAL; |
| 678 | goto exit; |
| 679 | } |
| 680 | |
| 681 | cdata.context = ctrl->lib_ctx; |
| 682 | |
| 683 | ddc_ctrl = ctrl->init_data.ddc_ctrl; |
| 684 | if (!ddc_ctrl) { |
| 685 | pr_err("invalid ddc ctrl\n"); |
| 686 | rc = -EINVAL; |
| 687 | goto exit; |
| 688 | } |
| 689 | |
| 690 | if (atomic_read(&ctrl->auth_state) == HDCP_STATE_INACTIVE) { |
| 691 | pr_err("hdcp is off\n"); |
| 692 | goto exit; |
| 693 | } |
| 694 | hdmi_ddc_config(ddc_ctrl); |
| 695 | |
| 696 | ddc_data = &ddc_ctrl->hdcp2p2_ddc_data; |
| 697 | |
| 698 | memset(ddc_data, 0, sizeof(*ddc_data)); |
| 699 | |
| 700 | timeout_hsync = hdmi_utils_get_timeout_in_hysnc( |
| 701 | ctrl->init_data.timing, ctrl->timeout); |
| 702 | |
| 703 | if (timeout_hsync <= 0) { |
| 704 | pr_err("err in timeout hsync calc\n"); |
| 705 | timeout_hsync = HDMI_DEFAULT_TIMEOUT_HSYNC; |
| 706 | } |
| 707 | |
| 708 | pr_debug("timeout for rxstatus %dms, %d hsync\n", |
| 709 | ctrl->timeout, timeout_hsync); |
| 710 | |
| 711 | ddc_data->intr_mask = RXSTATUS_MESSAGE_SIZE | RXSTATUS_REAUTH_REQ; |
| 712 | ddc_data->timeout_ms = ctrl->timeout; |
| 713 | ddc_data->timeout_hsync = timeout_hsync; |
| 714 | ddc_data->periodic_timer_hsync = timeout_hsync / 20; |
| 715 | ddc_data->read_method = HDCP2P2_RXSTATUS_HW_DDC_SW_TRIGGER; |
| 716 | ddc_data->wait = true; |
| 717 | |
| 718 | rc = hdmi_hdcp2p2_ddc_read_rxstatus(ddc_ctrl); |
| 719 | if (rc) { |
| 720 | pr_err("error reading rxstatus %d\n", rc); |
| 721 | goto exit; |
| 722 | } |
| 723 | |
| 724 | if (ddc_data->reauth_req) { |
| 725 | ddc_data->reauth_req = false; |
| 726 | |
| 727 | pr_debug("reauth triggered by sink\n"); |
| 728 | rc = -EINVAL; |
| 729 | goto exit; |
| 730 | } |
| 731 | |
| 732 | ctrl->timeout_left = ddc_data->timeout_left; |
| 733 | |
| 734 | pr_debug("timeout left after rxstatus %dms, msg size %d\n", |
| 735 | ctrl->timeout_left, ddc_data->message_size); |
| 736 | |
| 737 | if (!ddc_data->message_size) { |
| 738 | pr_err("recvd invalid message size\n"); |
| 739 | rc = -EINVAL; |
| 740 | goto exit; |
| 741 | } |
| 742 | |
| 743 | recvd_msg_buf = kzalloc(ddc_data->message_size, GFP_KERNEL); |
| 744 | if (!recvd_msg_buf) { |
| 745 | rc = -ENOMEM; |
| 746 | goto exit; |
| 747 | } |
| 748 | |
| 749 | rc = hdmi_hdcp2p2_ddc_read_message(ctrl, recvd_msg_buf, |
| 750 | ddc_data->message_size, ctrl->timeout_left); |
| 751 | if (rc) { |
| 752 | pr_err("error reading message %d\n", rc); |
| 753 | goto exit; |
| 754 | } |
| 755 | |
| 756 | cdata.cmd = HDCP_LIB_WKUP_CMD_MSG_RECV_SUCCESS; |
| 757 | cdata.recvd_msg_buf = recvd_msg_buf; |
| 758 | cdata.recvd_msg_len = ddc_data->message_size; |
| 759 | cdata.timeout = ctrl->timeout_left; |
| 760 | exit: |
| 761 | if (rc == -ETIMEDOUT) |
| 762 | cdata.cmd = HDCP_LIB_WKUP_CMD_MSG_RECV_TIMEOUT; |
| 763 | else if (rc) |
| 764 | cdata.cmd = HDCP_LIB_WKUP_CMD_MSG_RECV_FAILED; |
| 765 | |
| 766 | hdmi_hdcp2p2_wakeup_lib(ctrl, &cdata); |
| 767 | kfree(recvd_msg_buf); |
| 768 | } |
| 769 | |
| 770 | static void hdmi_hdcp2p2_recv_msg_work(struct kthread_work *work) |
| 771 | { |
| 772 | struct hdmi_hdcp2p2_ctrl *ctrl = container_of(work, |
| 773 | struct hdmi_hdcp2p2_ctrl, recv_msg); |
| 774 | |
| 775 | hdmi_hdcp2p2_recv_msg(ctrl); |
| 776 | } |
| 777 | |
| 778 | static int hdmi_hdcp2p2_link_check(struct hdmi_hdcp2p2_ctrl *ctrl) |
| 779 | { |
| 780 | struct hdmi_tx_ddc_ctrl *ddc_ctrl; |
| 781 | struct hdmi_tx_hdcp2p2_ddc_data *ddc_data; |
| 782 | int timeout_hsync; |
| 783 | |
| 784 | ddc_ctrl = ctrl->init_data.ddc_ctrl; |
| 785 | if (!ddc_ctrl) |
| 786 | return -EINVAL; |
| 787 | |
| 788 | hdmi_ddc_config(ddc_ctrl); |
| 789 | |
| 790 | ddc_data = &ddc_ctrl->hdcp2p2_ddc_data; |
| 791 | |
| 792 | memset(ddc_data, 0, sizeof(*ddc_data)); |
| 793 | |
| 794 | timeout_hsync = hdmi_utils_get_timeout_in_hysnc( |
| 795 | ctrl->init_data.timing, jiffies_to_msecs(HZ / 2)); |
| 796 | |
| 797 | if (timeout_hsync <= 0) { |
| 798 | pr_err("err in timeout hsync calc\n"); |
| 799 | timeout_hsync = HDMI_DEFAULT_TIMEOUT_HSYNC; |
| 800 | } |
| 801 | pr_debug("timeout for rxstatus %d hsyncs\n", timeout_hsync); |
| 802 | |
| 803 | ddc_data->intr_mask = RXSTATUS_READY | RXSTATUS_MESSAGE_SIZE | |
| 804 | RXSTATUS_REAUTH_REQ; |
| 805 | ddc_data->timeout_hsync = timeout_hsync; |
| 806 | ddc_data->periodic_timer_hsync = timeout_hsync; |
| 807 | ddc_data->read_method = HDCP2P2_RXSTATUS_HW_DDC_SW_TRIGGER; |
| 808 | ddc_data->link_cb = hdmi_hdcp2p2_link_cb; |
| 809 | ddc_data->link_data = ctrl; |
| 810 | |
| 811 | return hdmi_hdcp2p2_ddc_read_rxstatus(ddc_ctrl); |
| 812 | } |
| 813 | |
| 814 | static void hdmi_hdcp2p2_poll_work(struct kthread_work *work) |
| 815 | { |
| 816 | struct hdmi_hdcp2p2_ctrl *ctrl = container_of(work, |
| 817 | struct hdmi_hdcp2p2_ctrl, poll); |
| 818 | |
| 819 | hdmi_hdcp2p2_link_check(ctrl); |
| 820 | } |
| 821 | |
| 822 | static void hdmi_hdcp2p2_auth_status(struct hdmi_hdcp2p2_ctrl *ctrl) |
| 823 | { |
| 824 | if (!ctrl) { |
| 825 | pr_err("invalid input\n"); |
| 826 | return; |
| 827 | } |
| 828 | |
| 829 | if (atomic_read(&ctrl->auth_state) == HDCP_STATE_INACTIVE) { |
| 830 | pr_err("hdcp is off\n"); |
| 831 | return; |
| 832 | } |
| 833 | |
| 834 | if (ctrl->auth_status == HDMI_HDCP_AUTH_STATUS_SUCCESS) { |
| 835 | ctrl->init_data.notify_status(ctrl->init_data.cb_data, |
| 836 | HDCP_STATE_AUTHENTICATED); |
| 837 | |
| 838 | atomic_set(&ctrl->auth_state, HDCP_STATE_AUTHENTICATED); |
| 839 | |
| 840 | if (ctrl->tethered) |
| 841 | hdmi_hdcp2p2_link_check(ctrl); |
| 842 | } else { |
| 843 | hdmi_hdcp2p2_auth_failed(ctrl); |
| 844 | } |
| 845 | } |
| 846 | |
| 847 | static void hdmi_hdcp2p2_auth_status_work(struct kthread_work *work) |
| 848 | { |
| 849 | struct hdmi_hdcp2p2_ctrl *ctrl = container_of(work, |
| 850 | struct hdmi_hdcp2p2_ctrl, status); |
| 851 | |
| 852 | hdmi_hdcp2p2_auth_status(ctrl); |
| 853 | } |
| 854 | |
| 855 | static void hdmi_hdcp2p2_link_work(struct kthread_work *work) |
| 856 | { |
| 857 | int rc = 0; |
| 858 | struct hdmi_hdcp2p2_ctrl *ctrl = container_of(work, |
| 859 | struct hdmi_hdcp2p2_ctrl, link); |
| 860 | struct hdcp_lib_wakeup_data cdata = {HDCP_LIB_WKUP_CMD_INVALID}; |
| 861 | char *recvd_msg_buf = NULL; |
| 862 | struct hdmi_tx_hdcp2p2_ddc_data *ddc_data; |
| 863 | struct hdmi_tx_ddc_ctrl *ddc_ctrl; |
| 864 | |
| 865 | if (!ctrl) { |
| 866 | pr_err("invalid input\n"); |
| 867 | return; |
| 868 | } |
| 869 | |
| 870 | cdata.context = ctrl->lib_ctx; |
| 871 | |
| 872 | ddc_ctrl = ctrl->init_data.ddc_ctrl; |
| 873 | if (!ddc_ctrl) { |
| 874 | rc = -EINVAL; |
| 875 | cdata.cmd = HDCP_LIB_WKUP_CMD_STOP; |
| 876 | goto exit; |
| 877 | } |
| 878 | |
| 879 | ddc_data = &ddc_ctrl->hdcp2p2_ddc_data; |
| 880 | |
| 881 | if (ddc_data->reauth_req) { |
| 882 | pr_debug("reauth triggered by sink\n"); |
| 883 | |
| 884 | ddc_data->reauth_req = false; |
| 885 | rc = -ENOLINK; |
| 886 | cdata.cmd = HDCP_LIB_WKUP_CMD_STOP; |
| 887 | goto exit; |
| 888 | } |
| 889 | |
| 890 | if (ddc_data->ready && ddc_data->message_size) { |
| 891 | pr_debug("topology changed. rxstatus msg size %d\n", |
| 892 | ddc_data->message_size); |
| 893 | |
| 894 | ddc_data->ready = false; |
| 895 | |
| 896 | recvd_msg_buf = kzalloc(ddc_data->message_size, GFP_KERNEL); |
| 897 | if (!recvd_msg_buf) { |
| 898 | cdata.cmd = HDCP_LIB_WKUP_CMD_STOP; |
| 899 | goto exit; |
| 900 | } |
| 901 | |
| 902 | rc = hdmi_hdcp2p2_ddc_read_message(ctrl, recvd_msg_buf, |
| 903 | ddc_data->message_size, HDCP2P2_DEFAULT_TIMEOUT); |
| 904 | if (rc) { |
| 905 | cdata.cmd = HDCP_LIB_WKUP_CMD_STOP; |
| 906 | pr_err("error reading message %d\n", rc); |
| 907 | } else { |
| 908 | cdata.cmd = HDCP_LIB_WKUP_CMD_MSG_RECV_SUCCESS; |
| 909 | cdata.recvd_msg_buf = recvd_msg_buf; |
| 910 | cdata.recvd_msg_len = ddc_data->message_size; |
| 911 | } |
| 912 | |
| 913 | ddc_data->message_size = 0; |
| 914 | } |
| 915 | exit: |
| 916 | hdmi_hdcp2p2_wakeup_lib(ctrl, &cdata); |
| 917 | kfree(recvd_msg_buf); |
| 918 | |
| 919 | if (ctrl->tethered) |
| 920 | hdmi_hdcp2p2_run(ctrl); |
| 921 | |
| 922 | if (rc) { |
| 923 | hdmi_hdcp2p2_auth_failed(ctrl); |
| 924 | return; |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | static int hdmi_hdcp2p2_auth(struct hdmi_hdcp2p2_ctrl *ctrl) |
| 929 | { |
| 930 | struct hdcp_lib_wakeup_data cdata = {HDCP_LIB_WKUP_CMD_INVALID}; |
| 931 | int rc = 0; |
| 932 | |
| 933 | if (!ctrl) { |
| 934 | pr_err("invalid input\n"); |
| 935 | return -EINVAL; |
| 936 | } |
| 937 | |
| 938 | cdata.context = ctrl->lib_ctx; |
| 939 | |
| 940 | if (atomic_read(&ctrl->auth_state) == HDCP_STATE_AUTHENTICATING) |
| 941 | cdata.cmd = HDCP_LIB_WKUP_CMD_START; |
| 942 | else |
| 943 | cdata.cmd = HDCP_LIB_WKUP_CMD_STOP; |
| 944 | |
| 945 | rc = hdmi_hdcp2p2_wakeup_lib(ctrl, &cdata); |
| 946 | if (rc) |
| 947 | hdmi_hdcp2p2_auth_failed(ctrl); |
| 948 | |
| 949 | return rc; |
| 950 | } |
| 951 | |
| 952 | static void hdmi_hdcp2p2_auth_work(struct kthread_work *work) |
| 953 | { |
| 954 | struct hdmi_hdcp2p2_ctrl *ctrl = container_of(work, |
| 955 | struct hdmi_hdcp2p2_ctrl, auth); |
| 956 | |
| 957 | hdmi_hdcp2p2_auth(ctrl); |
| 958 | } |
| 959 | |
| 960 | void hdmi_hdcp2p2_deinit(void *input) |
| 961 | { |
| 962 | struct hdmi_hdcp2p2_ctrl *ctrl = (struct hdmi_hdcp2p2_ctrl *)input; |
| 963 | struct hdcp_lib_wakeup_data cdata = {HDCP_LIB_WKUP_CMD_INVALID}; |
| 964 | |
| 965 | if (!ctrl) { |
| 966 | pr_err("invalid input\n"); |
| 967 | return; |
| 968 | } |
| 969 | |
| 970 | cdata.cmd = HDCP_LIB_WKUP_CMD_STOP; |
| 971 | cdata.context = ctrl->lib_ctx; |
| 972 | hdmi_hdcp2p2_wakeup_lib(ctrl, &cdata); |
| 973 | |
| 974 | kthread_stop(ctrl->thread); |
| 975 | |
| 976 | sysfs_remove_group(ctrl->init_data.sysfs_kobj, |
| 977 | &hdmi_hdcp2p2_fs_attr_group); |
| 978 | |
| 979 | mutex_destroy(&ctrl->mutex); |
| 980 | mutex_destroy(&ctrl->msg_lock); |
| 981 | mutex_destroy(&ctrl->wakeup_mutex); |
| 982 | kfree(ctrl); |
| 983 | } |
| 984 | |
| 985 | void *hdmi_hdcp2p2_init(struct hdmi_hdcp_init_data *init_data) |
| 986 | { |
| 987 | int rc; |
| 988 | struct hdmi_hdcp2p2_ctrl *ctrl; |
| 989 | static struct hdmi_hdcp_ops ops = { |
| 990 | .hdmi_hdcp_reauthenticate = hdmi_hdcp2p2_reauthenticate, |
| 991 | .hdmi_hdcp_authenticate = hdmi_hdcp2p2_authenticate, |
| 992 | .feature_supported = hdmi_hdcp2p2_feature_supported, |
| 993 | .hdmi_hdcp_off = hdmi_hdcp2p2_off |
| 994 | }; |
| 995 | |
| 996 | static struct hdcp_client_ops client_ops = { |
| 997 | .wakeup = hdmi_hdcp2p2_wakeup, |
| 998 | }; |
| 999 | |
| 1000 | static struct hdcp_txmtr_ops txmtr_ops; |
| 1001 | struct hdcp_register_data register_data; |
| 1002 | |
| 1003 | pr_debug("HDCP2P2 feature initialization\n"); |
| 1004 | |
| 1005 | if (!init_data || !init_data->core_io || !init_data->mutex || |
| 1006 | !init_data->ddc_ctrl || !init_data->notify_status || |
| 1007 | !init_data->workq || !init_data->cb_data) { |
| 1008 | pr_err("invalid input\n"); |
| 1009 | return ERR_PTR(-EINVAL); |
| 1010 | } |
| 1011 | |
| 1012 | if (init_data->hdmi_tx_ver < MIN_HDMI_TX_MAJOR_VERSION) { |
| 1013 | pr_err("HDMI Tx does not support HDCP 2.2\n"); |
| 1014 | return ERR_PTR(-ENODEV); |
| 1015 | } |
| 1016 | |
| 1017 | ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); |
| 1018 | if (!ctrl) |
| 1019 | return ERR_PTR(-ENOMEM); |
| 1020 | |
| 1021 | ctrl->init_data = *init_data; |
| 1022 | ctrl->lib = &txmtr_ops; |
| 1023 | ctrl->tethered = init_data->tethered; |
| 1024 | |
| 1025 | rc = sysfs_create_group(init_data->sysfs_kobj, |
| 1026 | &hdmi_hdcp2p2_fs_attr_group); |
| 1027 | if (rc) { |
| 1028 | pr_err("hdcp2p2 sysfs group creation failed\n"); |
| 1029 | goto error; |
| 1030 | } |
| 1031 | |
| 1032 | ctrl->sink_status = SINK_DISCONNECTED; |
| 1033 | |
| 1034 | atomic_set(&ctrl->auth_state, HDCP_STATE_INACTIVE); |
| 1035 | |
| 1036 | ctrl->ops = &ops; |
| 1037 | mutex_init(&ctrl->mutex); |
| 1038 | mutex_init(&ctrl->msg_lock); |
| 1039 | mutex_init(&ctrl->wakeup_mutex); |
| 1040 | |
| 1041 | register_data.hdcp_ctx = &ctrl->lib_ctx; |
| 1042 | register_data.client_ops = &client_ops; |
| 1043 | register_data.txmtr_ops = &txmtr_ops; |
| 1044 | register_data.client_ctx = ctrl; |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 1045 | //register_data.tethered = ctrl->tethered; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 1046 | |
| 1047 | rc = hdcp_library_register(®ister_data); |
| 1048 | if (rc) { |
| 1049 | pr_err("Unable to register with HDCP 2.2 library\n"); |
| 1050 | goto error; |
| 1051 | } |
| 1052 | |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 1053 | kthread_init_worker(&ctrl->worker); |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 1054 | |
Sachin Bhayare | 3d3767e | 2018-01-02 21:10:57 +0530 | [diff] [blame] | 1055 | kthread_init_work(&ctrl->auth, hdmi_hdcp2p2_auth_work); |
| 1056 | kthread_init_work(&ctrl->send_msg, hdmi_hdcp2p2_send_msg_work); |
| 1057 | kthread_init_work(&ctrl->recv_msg, hdmi_hdcp2p2_recv_msg_work); |
| 1058 | kthread_init_work(&ctrl->status, hdmi_hdcp2p2_auth_status_work); |
| 1059 | kthread_init_work(&ctrl->link, hdmi_hdcp2p2_link_work); |
| 1060 | kthread_init_work(&ctrl->poll, hdmi_hdcp2p2_poll_work); |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 1061 | |
| 1062 | ctrl->thread = kthread_run(kthread_worker_fn, |
| 1063 | &ctrl->worker, "hdmi_hdcp2p2"); |
| 1064 | |
| 1065 | if (IS_ERR(ctrl->thread)) { |
| 1066 | pr_err("unable to start hdcp2p2 thread\n"); |
| 1067 | rc = PTR_ERR(ctrl->thread); |
| 1068 | ctrl->thread = NULL; |
| 1069 | goto error; |
| 1070 | } |
| 1071 | |
| 1072 | return ctrl; |
| 1073 | error: |
| 1074 | kfree(ctrl); |
| 1075 | return ERR_PTR(rc); |
| 1076 | } |
| 1077 | |
| 1078 | static bool hdmi_hdcp2p2_supported(struct hdmi_hdcp2p2_ctrl *ctrl) |
| 1079 | { |
Krishna Manikandan | 8120dfc | 2016-11-28 17:52:45 +0530 | [diff] [blame] | 1080 | u8 hdcp2version = 0; |
Sachin Bhayare | eeb8889 | 2018-01-02 16:36:01 +0530 | [diff] [blame] | 1081 | |
| 1082 | int rc = hdmi_hdcp2p2_read_version(ctrl, &hdcp2version); |
| 1083 | |
| 1084 | if (rc) |
| 1085 | goto error; |
| 1086 | |
| 1087 | if (hdcp2version & BIT(2)) { |
| 1088 | pr_debug("Sink is HDCP 2.2 capable\n"); |
| 1089 | return true; |
| 1090 | } |
| 1091 | |
| 1092 | error: |
| 1093 | pr_debug("Sink is not HDCP 2.2 capable\n"); |
| 1094 | return false; |
| 1095 | } |
| 1096 | |
| 1097 | struct hdmi_hdcp_ops *hdmi_hdcp2p2_start(void *input) |
| 1098 | { |
| 1099 | struct hdmi_hdcp2p2_ctrl *ctrl = input; |
| 1100 | |
| 1101 | pr_debug("Checking sink capability\n"); |
| 1102 | if (hdmi_hdcp2p2_supported(ctrl)) |
| 1103 | return ctrl->ops; |
| 1104 | else |
| 1105 | return NULL; |
| 1106 | |
| 1107 | } |
| 1108 | |