Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2016-2017, 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/slab.h> |
| 16 | #include <linux/bitops.h> |
| 17 | #include <linux/delay.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/mutex.h> |
| 20 | #include <linux/iopoll.h> |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/of_platform.h> |
| 23 | #include <linux/msm_ext_display.h> |
| 24 | |
| 25 | struct msm_ext_disp_list { |
| 26 | struct msm_ext_disp_init_data *data; |
| 27 | struct list_head list; |
| 28 | }; |
| 29 | |
| 30 | struct msm_ext_disp { |
| 31 | struct msm_ext_disp_data ext_disp_data; |
| 32 | struct platform_device *pdev; |
| 33 | enum msm_ext_disp_type current_disp; |
| 34 | struct msm_ext_disp_audio_codec_ops *ops; |
| 35 | struct extcon_dev audio_sdev; |
| 36 | bool audio_session_on; |
| 37 | struct list_head display_list; |
| 38 | struct mutex lock; |
| 39 | }; |
| 40 | |
| 41 | static const unsigned int msm_ext_disp_supported_cable[] = { |
| 42 | EXTCON_DISP_DP, |
| 43 | EXTCON_DISP_HDMI, |
| 44 | EXTCON_NONE, |
| 45 | }; |
| 46 | |
| 47 | static int msm_ext_disp_extcon_register(struct msm_ext_disp *ext_disp) |
| 48 | { |
| 49 | int ret = 0; |
| 50 | |
| 51 | if (!ext_disp) { |
| 52 | pr_err("invalid params\n"); |
| 53 | return -EINVAL; |
| 54 | } |
| 55 | |
| 56 | memset(&ext_disp->audio_sdev, 0x0, sizeof(ext_disp->audio_sdev)); |
| 57 | ext_disp->audio_sdev.supported_cable = msm_ext_disp_supported_cable; |
| 58 | ext_disp->audio_sdev.dev.parent = &ext_disp->pdev->dev; |
| 59 | ret = extcon_dev_register(&ext_disp->audio_sdev); |
| 60 | if (ret) { |
| 61 | pr_err("audio registration failed"); |
| 62 | return ret; |
| 63 | } |
| 64 | |
| 65 | pr_debug("extcon registration done\n"); |
| 66 | |
| 67 | return ret; |
| 68 | } |
| 69 | |
| 70 | static void msm_ext_disp_extcon_unregister(struct msm_ext_disp *ext_disp) |
| 71 | { |
| 72 | if (!ext_disp) { |
| 73 | pr_err("Invalid params\n"); |
| 74 | return; |
| 75 | } |
| 76 | |
| 77 | extcon_dev_unregister(&ext_disp->audio_sdev); |
| 78 | } |
| 79 | |
| 80 | static const char *msm_ext_disp_name(enum msm_ext_disp_type type) |
| 81 | { |
| 82 | switch (type) { |
| 83 | case EXT_DISPLAY_TYPE_HDMI: return "EXT_DISPLAY_TYPE_HDMI"; |
| 84 | case EXT_DISPLAY_TYPE_DP: return "EXT_DISPLAY_TYPE_DP"; |
| 85 | default: return "???"; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | static int msm_ext_disp_add_intf_data(struct msm_ext_disp *ext_disp, |
| 90 | struct msm_ext_disp_init_data *data) |
| 91 | { |
| 92 | struct msm_ext_disp_list *node; |
| 93 | |
| 94 | if (!ext_disp && !data) { |
| 95 | pr_err("Invalid params\n"); |
| 96 | return -EINVAL; |
| 97 | } |
| 98 | |
| 99 | node = kzalloc(sizeof(*node), GFP_KERNEL); |
| 100 | if (!node) |
| 101 | return -ENOMEM; |
| 102 | |
| 103 | node->data = data; |
| 104 | list_add(&node->list, &ext_disp->display_list); |
| 105 | |
| 106 | pr_debug("Added new display (%s)\n", msm_ext_disp_name(data->type)); |
| 107 | |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | static int msm_ext_disp_get_intf_data(struct msm_ext_disp *ext_disp, |
| 112 | enum msm_ext_disp_type type, |
| 113 | struct msm_ext_disp_init_data **data) |
| 114 | { |
| 115 | int ret = 0; |
| 116 | struct msm_ext_disp_list *node; |
| 117 | struct list_head *position = NULL; |
| 118 | |
| 119 | if (!ext_disp || !data || type < EXT_DISPLAY_TYPE_HDMI || |
| 120 | type >= EXT_DISPLAY_TYPE_MAX) { |
| 121 | pr_err("Invalid params\n"); |
| 122 | ret = -EINVAL; |
| 123 | goto end; |
| 124 | } |
| 125 | |
| 126 | *data = NULL; |
| 127 | list_for_each(position, &ext_disp->display_list) { |
| 128 | node = list_entry(position, struct msm_ext_disp_list, list); |
| 129 | if (node->data->type == type) { |
| 130 | *data = node->data; |
| 131 | break; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | if (!*data) { |
| 136 | pr_err("Display not found (%s)\n", msm_ext_disp_name(type)); |
| 137 | ret = -ENODEV; |
| 138 | } |
| 139 | end: |
| 140 | return ret; |
| 141 | } |
| 142 | |
| 143 | static int msm_ext_disp_process_audio(struct msm_ext_disp *ext_disp, |
| 144 | enum msm_ext_disp_type type, |
| 145 | enum msm_ext_disp_cable_state new_state) |
| 146 | { |
| 147 | int ret = 0; |
| 148 | int state; |
| 149 | |
Tatenda Chipeperekwa | dee24ac | 2017-10-26 18:04:33 -0700 | [diff] [blame] | 150 | if (!ext_disp->ops) { |
| 151 | pr_err("codec not registered, skip notification\n"); |
| 152 | ret = -EPERM; |
| 153 | goto end; |
| 154 | } |
| 155 | |
Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 156 | state = ext_disp->audio_sdev.state; |
| 157 | ret = extcon_set_state_sync(&ext_disp->audio_sdev, |
| 158 | ext_disp->current_disp, !!new_state); |
| 159 | |
| 160 | pr_debug("Audio state %s %d\n", |
| 161 | ext_disp->audio_sdev.state == state ? |
| 162 | "is same" : "switched to", |
| 163 | ext_disp->audio_sdev.state); |
Tatenda Chipeperekwa | dee24ac | 2017-10-26 18:04:33 -0700 | [diff] [blame] | 164 | end: |
Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 165 | return ret; |
| 166 | } |
| 167 | |
| 168 | static struct msm_ext_disp *msm_ext_disp_validate_and_get( |
| 169 | struct platform_device *pdev, |
| 170 | enum msm_ext_disp_type type, |
| 171 | enum msm_ext_disp_cable_state state) |
| 172 | { |
| 173 | struct msm_ext_disp_data *ext_disp_data; |
| 174 | struct msm_ext_disp *ext_disp; |
| 175 | |
| 176 | if (!pdev) { |
| 177 | pr_err("invalid platform device\n"); |
| 178 | goto err; |
| 179 | } |
| 180 | |
| 181 | ext_disp_data = platform_get_drvdata(pdev); |
| 182 | if (!ext_disp_data) { |
| 183 | pr_err("invalid drvdata\n"); |
| 184 | goto err; |
| 185 | } |
| 186 | |
| 187 | ext_disp = container_of(ext_disp_data, |
| 188 | struct msm_ext_disp, ext_disp_data); |
| 189 | |
| 190 | if (state < EXT_DISPLAY_CABLE_DISCONNECT || |
| 191 | state >= EXT_DISPLAY_CABLE_STATE_MAX) { |
| 192 | pr_err("invalid HPD state (%d)\n", state); |
| 193 | goto err; |
| 194 | } |
| 195 | |
| 196 | if (state == EXT_DISPLAY_CABLE_CONNECT) { |
| 197 | if (ext_disp->current_disp != EXT_DISPLAY_TYPE_MAX && |
| 198 | ext_disp->current_disp != type) { |
| 199 | pr_err("invalid interface call\n"); |
| 200 | goto err; |
| 201 | } |
| 202 | } else { |
| 203 | if (ext_disp->current_disp == EXT_DISPLAY_TYPE_MAX || |
| 204 | ext_disp->current_disp != type) { |
| 205 | pr_err("invalid interface call\n"); |
| 206 | goto err; |
| 207 | } |
| 208 | } |
| 209 | return ext_disp; |
| 210 | err: |
| 211 | return ERR_PTR(-EINVAL); |
| 212 | } |
| 213 | |
| 214 | static int msm_ext_disp_update_audio_ops(struct msm_ext_disp *ext_disp, |
| 215 | enum msm_ext_disp_type type, |
| 216 | enum msm_ext_disp_cable_state state) |
| 217 | { |
| 218 | int ret = 0; |
| 219 | struct msm_ext_disp_init_data *data = NULL; |
| 220 | |
| 221 | ret = msm_ext_disp_get_intf_data(ext_disp, type, &data); |
| 222 | if (ret || !data) { |
| 223 | pr_err("interface %s not found\n", msm_ext_disp_name(type)); |
| 224 | goto end; |
| 225 | } |
| 226 | |
Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 227 | if (state == EXT_DISPLAY_CABLE_CONNECT) { |
| 228 | /* connect codec with interface */ |
Tatenda Chipeperekwa | dee24ac | 2017-10-26 18:04:33 -0700 | [diff] [blame] | 229 | if (ext_disp->ops) |
| 230 | *ext_disp->ops = data->codec_ops; |
Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 231 | |
| 232 | /* update pdev for interface to use */ |
| 233 | ext_disp->ext_disp_data.intf_pdev = data->pdev; |
| 234 | ext_disp->ext_disp_data.intf_data = data->intf_data; |
| 235 | |
| 236 | ext_disp->current_disp = type; |
| 237 | |
| 238 | pr_debug("codec ops set for %s\n", msm_ext_disp_name(type)); |
| 239 | } else if (state == EXT_DISPLAY_CABLE_DISCONNECT) { |
Ajay Singh Parmar | b1d5bcd | 2017-11-23 00:09:02 -0800 | [diff] [blame] | 240 | if (ext_disp->ops) |
| 241 | *ext_disp->ops = |
| 242 | (struct msm_ext_disp_audio_codec_ops){NULL}; |
| 243 | |
Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 244 | ext_disp->current_disp = EXT_DISPLAY_TYPE_MAX; |
| 245 | |
| 246 | pr_debug("codec ops cleared for %s\n", msm_ext_disp_name(type)); |
| 247 | } |
| 248 | end: |
| 249 | return ret; |
| 250 | } |
| 251 | |
| 252 | static int msm_ext_disp_audio_config(struct platform_device *pdev, |
| 253 | enum msm_ext_disp_type type, |
| 254 | enum msm_ext_disp_cable_state state) |
| 255 | { |
| 256 | int ret = 0; |
| 257 | struct msm_ext_disp *ext_disp; |
| 258 | |
| 259 | ext_disp = msm_ext_disp_validate_and_get(pdev, type, state); |
| 260 | if (IS_ERR(ext_disp)) { |
| 261 | ret = PTR_ERR(ext_disp); |
| 262 | goto end; |
| 263 | } |
| 264 | |
| 265 | mutex_lock(&ext_disp->lock); |
| 266 | ret = msm_ext_disp_update_audio_ops(ext_disp, type, state); |
| 267 | mutex_unlock(&ext_disp->lock); |
| 268 | end: |
| 269 | return ret; |
| 270 | } |
| 271 | |
| 272 | static int msm_ext_disp_audio_notify(struct platform_device *pdev, |
| 273 | enum msm_ext_disp_type type, |
| 274 | enum msm_ext_disp_cable_state state) |
| 275 | { |
| 276 | int ret = 0; |
| 277 | struct msm_ext_disp *ext_disp; |
| 278 | |
| 279 | ext_disp = msm_ext_disp_validate_and_get(pdev, type, state); |
| 280 | if (IS_ERR(ext_disp)) { |
| 281 | ret = PTR_ERR(ext_disp); |
| 282 | goto end; |
| 283 | } |
| 284 | |
| 285 | mutex_lock(&ext_disp->lock); |
| 286 | ret = msm_ext_disp_process_audio(ext_disp, type, state); |
| 287 | mutex_unlock(&ext_disp->lock); |
| 288 | end: |
| 289 | return ret; |
| 290 | } |
| 291 | |
Tatenda Chipeperekwa | dee24ac | 2017-10-26 18:04:33 -0700 | [diff] [blame] | 292 | static void msm_ext_disp_ready_for_display(struct msm_ext_disp *ext_disp) |
| 293 | { |
| 294 | int ret; |
| 295 | struct msm_ext_disp_init_data *data = NULL; |
| 296 | |
| 297 | if (!ext_disp) { |
| 298 | pr_err("invalid input\n"); |
| 299 | return; |
| 300 | } |
| 301 | |
| 302 | ret = msm_ext_disp_get_intf_data(ext_disp, |
| 303 | ext_disp->current_disp, &data); |
| 304 | if (ret) { |
| 305 | pr_err("%s not found\n", |
| 306 | msm_ext_disp_name(ext_disp->current_disp)); |
| 307 | return; |
| 308 | } |
| 309 | |
| 310 | *ext_disp->ops = data->codec_ops; |
| 311 | data->codec_ops.ready(ext_disp->pdev); |
| 312 | } |
| 313 | |
Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 314 | int msm_hdmi_register_audio_codec(struct platform_device *pdev, |
| 315 | struct msm_ext_disp_audio_codec_ops *ops) |
| 316 | { |
| 317 | return msm_ext_disp_register_audio_codec(pdev, ops); |
| 318 | } |
| 319 | |
Laxminath Kasam | b04f022 | 2017-09-28 15:50:21 +0530 | [diff] [blame] | 320 | /** |
| 321 | * Register audio codec ops to display driver |
| 322 | * for HDMI/Display Port usecase support. |
| 323 | * |
| 324 | * @return 0 on success, negative value on error |
| 325 | * |
| 326 | */ |
Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 327 | int msm_ext_disp_register_audio_codec(struct platform_device *pdev, |
| 328 | struct msm_ext_disp_audio_codec_ops *ops) |
| 329 | { |
| 330 | int ret = 0; |
| 331 | struct msm_ext_disp *ext_disp = NULL; |
| 332 | struct msm_ext_disp_data *ext_disp_data = NULL; |
| 333 | |
| 334 | if (!pdev || !ops) { |
| 335 | pr_err("Invalid params\n"); |
| 336 | return -EINVAL; |
| 337 | } |
| 338 | |
| 339 | ext_disp_data = platform_get_drvdata(pdev); |
| 340 | if (!ext_disp_data) { |
| 341 | pr_err("Invalid drvdata\n"); |
| 342 | return -EINVAL; |
| 343 | } |
| 344 | |
| 345 | ext_disp = container_of(ext_disp_data, struct msm_ext_disp, |
| 346 | ext_disp_data); |
| 347 | |
| 348 | mutex_lock(&ext_disp->lock); |
| 349 | |
| 350 | if ((ext_disp->current_disp != EXT_DISPLAY_TYPE_MAX) |
| 351 | && ext_disp->ops) { |
| 352 | pr_err("Codec already registered\n"); |
| 353 | ret = -EINVAL; |
| 354 | goto end; |
| 355 | } |
| 356 | |
| 357 | ext_disp->ops = ops; |
| 358 | |
| 359 | pr_debug("audio codec registered\n"); |
| 360 | |
| 361 | end: |
| 362 | mutex_unlock(&ext_disp->lock); |
Tatenda Chipeperekwa | dee24ac | 2017-10-26 18:04:33 -0700 | [diff] [blame] | 363 | if (ext_disp->current_disp != EXT_DISPLAY_TYPE_MAX) |
| 364 | msm_ext_disp_ready_for_display(ext_disp); |
Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 365 | |
| 366 | return ret; |
| 367 | } |
Laxminath Kasam | b04f022 | 2017-09-28 15:50:21 +0530 | [diff] [blame] | 368 | EXPORT_SYMBOL(msm_ext_disp_register_audio_codec); |
Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 369 | |
| 370 | static int msm_ext_disp_validate_intf(struct msm_ext_disp_init_data *init_data) |
| 371 | { |
Tatenda Chipeperekwa | dee24ac | 2017-10-26 18:04:33 -0700 | [diff] [blame] | 372 | struct msm_ext_disp_audio_codec_ops *ops; |
| 373 | |
Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 374 | if (!init_data) { |
| 375 | pr_err("Invalid init_data\n"); |
| 376 | return -EINVAL; |
| 377 | } |
| 378 | |
| 379 | if (!init_data->pdev) { |
| 380 | pr_err("Invalid display intf pdev\n"); |
| 381 | return -EINVAL; |
| 382 | } |
| 383 | |
Tatenda Chipeperekwa | dee24ac | 2017-10-26 18:04:33 -0700 | [diff] [blame] | 384 | ops = &init_data->codec_ops; |
| 385 | |
| 386 | if (!ops->audio_info_setup || |
| 387 | !ops->get_audio_edid_blk || |
| 388 | !ops->cable_status || |
| 389 | !ops->get_intf_id || |
| 390 | !ops->teardown_done || |
| 391 | !ops->acknowledge || |
| 392 | !ops->ready) { |
Tatenda Chipeperekwa | 326526e | 2017-04-24 16:51:50 -0700 | [diff] [blame] | 393 | pr_err("Invalid codec operation pointers\n"); |
| 394 | return -EINVAL; |
| 395 | } |
| 396 | |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | int msm_ext_disp_register_intf(struct platform_device *pdev, |
| 401 | struct msm_ext_disp_init_data *init_data) |
| 402 | { |
| 403 | int ret = 0; |
| 404 | struct msm_ext_disp_init_data *data = NULL; |
| 405 | struct msm_ext_disp *ext_disp = NULL; |
| 406 | struct msm_ext_disp_data *ext_disp_data = NULL; |
| 407 | |
| 408 | if (!pdev || !init_data) { |
| 409 | pr_err("Invalid params\n"); |
| 410 | return -EINVAL; |
| 411 | } |
| 412 | |
| 413 | ext_disp_data = platform_get_drvdata(pdev); |
| 414 | if (!ext_disp_data) { |
| 415 | pr_err("Invalid drvdata\n"); |
| 416 | return -EINVAL; |
| 417 | } |
| 418 | |
| 419 | ext_disp = container_of(ext_disp_data, struct msm_ext_disp, |
| 420 | ext_disp_data); |
| 421 | |
| 422 | mutex_lock(&ext_disp->lock); |
| 423 | |
| 424 | ret = msm_ext_disp_validate_intf(init_data); |
| 425 | if (ret) |
| 426 | goto end; |
| 427 | |
| 428 | ret = msm_ext_disp_get_intf_data(ext_disp, init_data->type, &data); |
| 429 | if (!ret) { |
| 430 | pr_err("%s already registered\n", |
| 431 | msm_ext_disp_name(init_data->type)); |
| 432 | goto end; |
| 433 | } |
| 434 | |
| 435 | ret = msm_ext_disp_add_intf_data(ext_disp, init_data); |
| 436 | if (ret) |
| 437 | goto end; |
| 438 | |
| 439 | init_data->intf_ops.audio_config = msm_ext_disp_audio_config; |
| 440 | init_data->intf_ops.audio_notify = msm_ext_disp_audio_notify; |
| 441 | |
| 442 | pr_debug("%s registered\n", msm_ext_disp_name(init_data->type)); |
| 443 | |
| 444 | mutex_unlock(&ext_disp->lock); |
| 445 | |
| 446 | return ret; |
| 447 | |
| 448 | end: |
| 449 | mutex_unlock(&ext_disp->lock); |
| 450 | |
| 451 | return ret; |
| 452 | } |
| 453 | |
| 454 | static int msm_ext_disp_probe(struct platform_device *pdev) |
| 455 | { |
| 456 | int ret = 0; |
| 457 | struct device_node *of_node = NULL; |
| 458 | struct msm_ext_disp *ext_disp = NULL; |
| 459 | |
| 460 | if (!pdev) { |
| 461 | pr_err("No platform device found\n"); |
| 462 | ret = -ENODEV; |
| 463 | goto end; |
| 464 | } |
| 465 | |
| 466 | of_node = pdev->dev.of_node; |
| 467 | if (!of_node) { |
| 468 | pr_err("No device node found\n"); |
| 469 | ret = -ENODEV; |
| 470 | goto end; |
| 471 | } |
| 472 | |
| 473 | ext_disp = devm_kzalloc(&pdev->dev, sizeof(*ext_disp), GFP_KERNEL); |
| 474 | if (!ext_disp) { |
| 475 | ret = -ENOMEM; |
| 476 | goto end; |
| 477 | } |
| 478 | |
| 479 | platform_set_drvdata(pdev, &ext_disp->ext_disp_data); |
| 480 | ext_disp->pdev = pdev; |
| 481 | |
| 482 | ret = msm_ext_disp_extcon_register(ext_disp); |
| 483 | if (ret) |
| 484 | goto extcon_dev_failure; |
| 485 | |
| 486 | ret = of_platform_populate(of_node, NULL, NULL, &pdev->dev); |
| 487 | if (ret) { |
| 488 | pr_err("Failed to add child devices. Error = %d\n", ret); |
| 489 | goto child_node_failure; |
| 490 | } else { |
| 491 | pr_debug("%s: Added child devices.\n", __func__); |
| 492 | } |
| 493 | |
| 494 | mutex_init(&ext_disp->lock); |
| 495 | |
| 496 | INIT_LIST_HEAD(&ext_disp->display_list); |
| 497 | ext_disp->current_disp = EXT_DISPLAY_TYPE_MAX; |
| 498 | |
| 499 | return ret; |
| 500 | |
| 501 | child_node_failure: |
| 502 | msm_ext_disp_extcon_unregister(ext_disp); |
| 503 | extcon_dev_failure: |
| 504 | devm_kfree(&ext_disp->pdev->dev, ext_disp); |
| 505 | end: |
| 506 | return ret; |
| 507 | } |
| 508 | |
| 509 | static int msm_ext_disp_remove(struct platform_device *pdev) |
| 510 | { |
| 511 | int ret = 0; |
| 512 | struct msm_ext_disp *ext_disp = NULL; |
| 513 | struct msm_ext_disp_data *ext_disp_data = NULL; |
| 514 | |
| 515 | if (!pdev) { |
| 516 | pr_err("No platform device\n"); |
| 517 | ret = -ENODEV; |
| 518 | goto end; |
| 519 | } |
| 520 | |
| 521 | ext_disp_data = platform_get_drvdata(pdev); |
| 522 | if (!ext_disp_data) { |
| 523 | pr_err("No drvdata found\n"); |
| 524 | ret = -ENODEV; |
| 525 | goto end; |
| 526 | } |
| 527 | |
| 528 | ext_disp = container_of(ext_disp_data, struct msm_ext_disp, |
| 529 | ext_disp_data); |
| 530 | |
| 531 | msm_ext_disp_extcon_unregister(ext_disp); |
| 532 | |
| 533 | mutex_destroy(&ext_disp->lock); |
| 534 | devm_kfree(&ext_disp->pdev->dev, ext_disp); |
| 535 | |
| 536 | end: |
| 537 | return ret; |
| 538 | } |
| 539 | |
| 540 | static const struct of_device_id msm_ext_dt_match[] = { |
| 541 | {.compatible = "qcom,msm-ext-disp",}, |
| 542 | { /* Sentinel */ }, |
| 543 | }; |
| 544 | MODULE_DEVICE_TABLE(of, msm_ext_dt_match); |
| 545 | |
| 546 | static struct platform_driver this_driver = { |
| 547 | .probe = msm_ext_disp_probe, |
| 548 | .remove = msm_ext_disp_remove, |
| 549 | .driver = { |
| 550 | .name = "msm-ext-disp", |
| 551 | .of_match_table = msm_ext_dt_match, |
| 552 | }, |
| 553 | }; |
| 554 | |
| 555 | static int __init msm_ext_disp_init(void) |
| 556 | { |
| 557 | int ret = 0; |
| 558 | |
| 559 | ret = platform_driver_register(&this_driver); |
| 560 | if (ret) |
| 561 | pr_err("failed, ret = %d\n", ret); |
| 562 | |
| 563 | return ret; |
| 564 | } |
| 565 | |
| 566 | static void __exit msm_ext_disp_exit(void) |
| 567 | { |
| 568 | platform_driver_unregister(&this_driver); |
| 569 | } |
| 570 | |
| 571 | subsys_initcall(msm_ext_disp_init); |
| 572 | module_exit(msm_ext_disp_exit); |
| 573 | |
| 574 | MODULE_LICENSE("GPL v2"); |
| 575 | MODULE_DESCRIPTION("MSM External Display"); |