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0c078e31 DA |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * A virtual stateless decoder device for stateless uAPI development purposes. | |
4 | * | |
5 | * This tool's objective is to help the development and testing of userspace | |
6 | * applications that use the V4L2 stateless API to decode media. | |
7 | * | |
8 | * A userspace implementation can use visl to run a decoding loop even when no | |
9 | * hardware is available or when the kernel uAPI for the codec has not been | |
10 | * upstreamed yet. This can reveal bugs at an early stage. | |
11 | * | |
12 | * This driver can also trace the contents of the V4L2 controls submitted to it. | |
13 | * It can also dump the contents of the vb2 buffers through a debugfs | |
14 | * interface. This is in many ways similar to the tracing infrastructure | |
15 | * available for other popular encode/decode APIs out there and can help develop | |
16 | * a userspace application by using another (working) one as a reference. | |
17 | * | |
18 | * Note that no actual decoding of video frames is performed by visl. The V4L2 | |
19 | * test pattern generator is used to write various debug information to the | |
20 | * capture buffers instead. | |
21 | * | |
22 | * Copyright (C) 2022 Collabora, Ltd. | |
23 | * | |
24 | * Based on the vim2m driver, that is: | |
25 | * | |
26 | * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd. | |
27 | * Pawel Osciak, <pawel@osciak.com> | |
28 | * Marek Szyprowski, <m.szyprowski@samsung.com> | |
29 | * | |
30 | * Based on the vicodec driver, that is: | |
31 | * | |
32 | * Copyright 2018 Cisco Systems, Inc. and/or its affiliates. All rights reserved. | |
33 | * | |
34 | * Based on the Cedrus VPU driver, that is: | |
35 | * | |
36 | * Copyright (C) 2016 Florent Revest <florent.revest@free-electrons.com> | |
37 | * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@bootlin.com> | |
38 | * Copyright (C) 2018 Bootlin | |
39 | */ | |
40 | ||
41 | #include <linux/debugfs.h> | |
42 | #include <linux/module.h> | |
43 | #include <linux/platform_device.h> | |
44 | #include <media/v4l2-ctrls.h> | |
45 | #include <media/v4l2-device.h> | |
46 | #include <media/v4l2-ioctl.h> | |
47 | #include <media/v4l2-mem2mem.h> | |
48 | ||
49 | #include "visl.h" | |
50 | #include "visl-dec.h" | |
51 | #include "visl-debugfs.h" | |
52 | #include "visl-video.h" | |
53 | ||
54 | unsigned int visl_debug; | |
55 | module_param(visl_debug, uint, 0644); | |
56 | MODULE_PARM_DESC(visl_debug, " activates debug info"); | |
57 | ||
58 | unsigned int visl_transtime_ms; | |
59 | module_param(visl_transtime_ms, uint, 0644); | |
60 | MODULE_PARM_DESC(visl_transtime_ms, " simulated process time in milliseconds."); | |
61 | ||
62 | /* | |
63 | * dprintk can be slow through serial. This lets one limit the tracing to a | |
64 | * particular number of frames | |
65 | */ | |
66 | int visl_dprintk_frame_start = -1; | |
68f715a8 | 67 | module_param(visl_dprintk_frame_start, int, 0444); |
0c078e31 DA |
68 | MODULE_PARM_DESC(visl_dprintk_frame_start, |
69 | " a frame number to start tracing with dprintk"); | |
70 | ||
71 | unsigned int visl_dprintk_nframes; | |
68f715a8 | 72 | module_param(visl_dprintk_nframes, uint, 0444); |
0c078e31 DA |
73 | MODULE_PARM_DESC(visl_dprintk_nframes, |
74 | " the number of frames to trace with dprintk"); | |
75 | ||
76 | bool keep_bitstream_buffers; | |
68f715a8 | 77 | module_param(keep_bitstream_buffers, bool, 0444); |
0c078e31 DA |
78 | MODULE_PARM_DESC(keep_bitstream_buffers, |
79 | " keep bitstream buffers in debugfs after streaming is stopped"); | |
80 | ||
81 | int bitstream_trace_frame_start = -1; | |
68f715a8 | 82 | module_param(bitstream_trace_frame_start, int, 0444); |
0c078e31 DA |
83 | MODULE_PARM_DESC(bitstream_trace_frame_start, |
84 | " a frame number to start dumping the bitstream through debugfs"); | |
85 | ||
86 | unsigned int bitstream_trace_nframes; | |
68f715a8 | 87 | module_param(bitstream_trace_nframes, uint, 0444); |
0c078e31 DA |
88 | MODULE_PARM_DESC(bitstream_trace_nframes, |
89 | " the number of frames to dump the bitstream through debugfs"); | |
90 | ||
8901f20b DC |
91 | bool tpg_verbose; |
92 | module_param(tpg_verbose, bool, 0644); | |
93 | MODULE_PARM_DESC(tpg_verbose, | |
94 | " add more verbose information on the generated output frames"); | |
95 | ||
0c078e31 DA |
96 | static const struct visl_ctrl_desc visl_fwht_ctrl_descs[] = { |
97 | { | |
98 | .cfg.id = V4L2_CID_STATELESS_FWHT_PARAMS, | |
99 | }, | |
100 | }; | |
101 | ||
102 | const struct visl_ctrls visl_fwht_ctrls = { | |
103 | .ctrls = visl_fwht_ctrl_descs, | |
104 | .num_ctrls = ARRAY_SIZE(visl_fwht_ctrl_descs) | |
105 | }; | |
106 | ||
107 | static const struct visl_ctrl_desc visl_mpeg2_ctrl_descs[] = { | |
108 | { | |
109 | .cfg.id = V4L2_CID_STATELESS_MPEG2_SEQUENCE, | |
110 | }, | |
111 | { | |
112 | .cfg.id = V4L2_CID_STATELESS_MPEG2_PICTURE, | |
113 | }, | |
114 | { | |
115 | .cfg.id = V4L2_CID_STATELESS_MPEG2_QUANTISATION, | |
116 | }, | |
117 | }; | |
118 | ||
119 | const struct visl_ctrls visl_mpeg2_ctrls = { | |
120 | .ctrls = visl_mpeg2_ctrl_descs, | |
121 | .num_ctrls = ARRAY_SIZE(visl_mpeg2_ctrl_descs), | |
122 | }; | |
123 | ||
124 | static const struct visl_ctrl_desc visl_vp8_ctrl_descs[] = { | |
125 | { | |
126 | .cfg.id = V4L2_CID_STATELESS_VP8_FRAME, | |
127 | }, | |
128 | }; | |
129 | ||
130 | const struct visl_ctrls visl_vp8_ctrls = { | |
131 | .ctrls = visl_vp8_ctrl_descs, | |
132 | .num_ctrls = ARRAY_SIZE(visl_vp8_ctrl_descs), | |
133 | }; | |
134 | ||
135 | static const struct visl_ctrl_desc visl_vp9_ctrl_descs[] = { | |
136 | { | |
137 | .cfg.id = V4L2_CID_STATELESS_VP9_FRAME, | |
138 | }, | |
139 | { | |
140 | .cfg.id = V4L2_CID_STATELESS_VP9_COMPRESSED_HDR, | |
141 | }, | |
142 | }; | |
143 | ||
144 | const struct visl_ctrls visl_vp9_ctrls = { | |
145 | .ctrls = visl_vp9_ctrl_descs, | |
146 | .num_ctrls = ARRAY_SIZE(visl_vp9_ctrl_descs), | |
147 | }; | |
148 | ||
149 | static const struct visl_ctrl_desc visl_h264_ctrl_descs[] = { | |
150 | { | |
151 | .cfg.id = V4L2_CID_STATELESS_H264_DECODE_PARAMS, | |
152 | }, | |
153 | { | |
154 | .cfg.id = V4L2_CID_STATELESS_H264_SPS, | |
155 | }, | |
156 | { | |
157 | .cfg.id = V4L2_CID_STATELESS_H264_PPS, | |
158 | }, | |
159 | { | |
160 | .cfg.id = V4L2_CID_STATELESS_H264_SCALING_MATRIX, | |
161 | }, | |
162 | { | |
163 | .cfg.id = V4L2_CID_STATELESS_H264_DECODE_MODE, | |
164 | }, | |
165 | { | |
166 | .cfg.id = V4L2_CID_STATELESS_H264_START_CODE, | |
167 | }, | |
168 | { | |
169 | .cfg.id = V4L2_CID_STATELESS_H264_SLICE_PARAMS, | |
170 | }, | |
171 | { | |
172 | .cfg.id = V4L2_CID_STATELESS_H264_PRED_WEIGHTS, | |
173 | }, | |
174 | }; | |
175 | ||
176 | const struct visl_ctrls visl_h264_ctrls = { | |
177 | .ctrls = visl_h264_ctrl_descs, | |
178 | .num_ctrls = ARRAY_SIZE(visl_h264_ctrl_descs), | |
179 | }; | |
180 | ||
181 | static const struct visl_ctrl_desc visl_hevc_ctrl_descs[] = { | |
182 | { | |
183 | .cfg.id = V4L2_CID_STATELESS_HEVC_SPS, | |
184 | }, | |
185 | { | |
186 | .cfg.id = V4L2_CID_STATELESS_HEVC_PPS, | |
187 | }, | |
188 | { | |
189 | .cfg.id = V4L2_CID_STATELESS_HEVC_SLICE_PARAMS, | |
190 | /* The absolute maximum for level > 6 */ | |
191 | .cfg.dims = { 600 }, | |
192 | }, | |
193 | { | |
194 | .cfg.id = V4L2_CID_STATELESS_HEVC_SCALING_MATRIX, | |
195 | }, | |
196 | { | |
197 | .cfg.id = V4L2_CID_STATELESS_HEVC_DECODE_PARAMS, | |
198 | }, | |
199 | { | |
200 | .cfg.id = V4L2_CID_STATELESS_HEVC_DECODE_MODE, | |
201 | }, | |
202 | { | |
203 | .cfg.id = V4L2_CID_STATELESS_HEVC_START_CODE, | |
204 | }, | |
205 | { | |
206 | .cfg.id = V4L2_CID_STATELESS_HEVC_ENTRY_POINT_OFFSETS, | |
207 | .cfg.dims = { 256 }, | |
208 | .cfg.max = 0xffffffff, | |
209 | .cfg.step = 1, | |
210 | }, | |
211 | ||
212 | }; | |
213 | ||
214 | const struct visl_ctrls visl_hevc_ctrls = { | |
215 | .ctrls = visl_hevc_ctrl_descs, | |
216 | .num_ctrls = ARRAY_SIZE(visl_hevc_ctrl_descs), | |
217 | }; | |
218 | ||
98b3cd0b DC |
219 | static const struct visl_ctrl_desc visl_av1_ctrl_descs[] = { |
220 | { | |
221 | .cfg.id = V4L2_CID_STATELESS_AV1_FRAME, | |
222 | }, | |
223 | { | |
224 | .cfg.id = V4L2_CID_STATELESS_AV1_TILE_GROUP_ENTRY, | |
225 | .cfg.dims = { V4L2_AV1_MAX_TILE_COUNT }, | |
226 | }, | |
227 | { | |
228 | .cfg.id = V4L2_CID_STATELESS_AV1_SEQUENCE, | |
229 | }, | |
230 | { | |
231 | .cfg.id = V4L2_CID_STATELESS_AV1_FILM_GRAIN, | |
232 | }, | |
233 | }; | |
234 | ||
235 | const struct visl_ctrls visl_av1_ctrls = { | |
236 | .ctrls = visl_av1_ctrl_descs, | |
237 | .num_ctrls = ARRAY_SIZE(visl_av1_ctrl_descs), | |
238 | }; | |
239 | ||
0c078e31 DA |
240 | struct v4l2_ctrl *visl_find_control(struct visl_ctx *ctx, u32 id) |
241 | { | |
242 | struct v4l2_ctrl_handler *hdl = &ctx->hdl; | |
243 | ||
244 | return v4l2_ctrl_find(hdl, id); | |
245 | } | |
246 | ||
247 | void *visl_find_control_data(struct visl_ctx *ctx, u32 id) | |
248 | { | |
249 | struct v4l2_ctrl *ctrl; | |
250 | ||
251 | ctrl = visl_find_control(ctx, id); | |
252 | if (ctrl) | |
253 | return ctrl->p_cur.p; | |
254 | ||
255 | return NULL; | |
256 | } | |
257 | ||
258 | u32 visl_control_num_elems(struct visl_ctx *ctx, u32 id) | |
259 | { | |
260 | struct v4l2_ctrl *ctrl; | |
261 | ||
262 | ctrl = visl_find_control(ctx, id); | |
263 | if (ctrl) | |
264 | return ctrl->elems; | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | static void visl_device_release(struct video_device *vdev) | |
270 | { | |
271 | struct visl_dev *dev = container_of(vdev, struct visl_dev, vfd); | |
272 | ||
273 | v4l2_device_unregister(&dev->v4l2_dev); | |
274 | v4l2_m2m_release(dev->m2m_dev); | |
275 | media_device_cleanup(&dev->mdev); | |
276 | visl_debugfs_deinit(dev); | |
277 | kfree(dev); | |
278 | } | |
279 | ||
280 | #define VISL_CONTROLS_COUNT ARRAY_SIZE(visl_controls) | |
281 | ||
282 | static int visl_init_ctrls(struct visl_ctx *ctx) | |
283 | { | |
284 | struct visl_dev *dev = ctx->dev; | |
285 | struct v4l2_ctrl_handler *hdl = &ctx->hdl; | |
286 | unsigned int ctrl_cnt = 0; | |
287 | unsigned int i; | |
288 | unsigned int j; | |
289 | const struct visl_ctrls *ctrls; | |
290 | ||
291 | for (i = 0; i < num_coded_fmts; i++) | |
292 | ctrl_cnt += visl_coded_fmts[i].ctrls->num_ctrls; | |
293 | ||
294 | v4l2_ctrl_handler_init(hdl, ctrl_cnt); | |
295 | ||
296 | for (i = 0; i < num_coded_fmts; i++) { | |
297 | ctrls = visl_coded_fmts[i].ctrls; | |
298 | for (j = 0; j < ctrls->num_ctrls; j++) | |
299 | v4l2_ctrl_new_custom(hdl, &ctrls->ctrls[j].cfg, NULL); | |
300 | } | |
301 | ||
302 | if (hdl->error) { | |
303 | v4l2_err(&dev->v4l2_dev, | |
304 | "Failed to initialize control handler\n"); | |
305 | v4l2_ctrl_handler_free(hdl); | |
306 | return hdl->error; | |
307 | } | |
308 | ||
309 | ctx->fh.ctrl_handler = hdl; | |
310 | v4l2_ctrl_handler_setup(hdl); | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
315 | static int visl_open(struct file *file) | |
316 | { | |
317 | struct visl_dev *dev = video_drvdata(file); | |
318 | struct visl_ctx *ctx = NULL; | |
319 | int rc = 0; | |
320 | ||
321 | if (mutex_lock_interruptible(&dev->dev_mutex)) | |
322 | return -ERESTARTSYS; | |
323 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
324 | if (!ctx) { | |
325 | rc = -ENOMEM; | |
326 | goto unlock; | |
327 | } | |
328 | ||
329 | ctx->tpg_str_buf = kzalloc(TPG_STR_BUF_SZ, GFP_KERNEL); | |
330 | ||
331 | v4l2_fh_init(&ctx->fh, video_devdata(file)); | |
332 | file->private_data = &ctx->fh; | |
333 | ctx->dev = dev; | |
334 | ||
335 | rc = visl_init_ctrls(ctx); | |
336 | if (rc) | |
337 | goto free_ctx; | |
338 | ||
339 | ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &visl_queue_init); | |
340 | ||
341 | mutex_init(&ctx->vb_mutex); | |
342 | ||
343 | if (IS_ERR(ctx->fh.m2m_ctx)) { | |
344 | rc = PTR_ERR(ctx->fh.m2m_ctx); | |
345 | goto free_hdl; | |
346 | } | |
347 | ||
348 | rc = visl_set_default_format(ctx); | |
349 | if (rc) | |
350 | goto free_m2m_ctx; | |
351 | ||
352 | v4l2_fh_add(&ctx->fh); | |
353 | ||
354 | dprintk(dev, "Created instance: %p, m2m_ctx: %p\n", | |
355 | ctx, ctx->fh.m2m_ctx); | |
356 | ||
357 | mutex_unlock(&dev->dev_mutex); | |
358 | return rc; | |
359 | ||
360 | free_m2m_ctx: | |
361 | v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); | |
362 | free_hdl: | |
363 | v4l2_ctrl_handler_free(&ctx->hdl); | |
364 | v4l2_fh_exit(&ctx->fh); | |
365 | free_ctx: | |
366 | kfree(ctx->tpg_str_buf); | |
367 | kfree(ctx); | |
368 | unlock: | |
369 | mutex_unlock(&dev->dev_mutex); | |
370 | return rc; | |
371 | } | |
372 | ||
373 | static int visl_release(struct file *file) | |
374 | { | |
375 | struct visl_dev *dev = video_drvdata(file); | |
376 | struct visl_ctx *ctx = visl_file_to_ctx(file); | |
377 | ||
378 | dprintk(dev, "Releasing instance %p\n", ctx); | |
379 | ||
380 | tpg_free(&ctx->tpg); | |
381 | v4l2_fh_del(&ctx->fh); | |
382 | v4l2_fh_exit(&ctx->fh); | |
383 | v4l2_ctrl_handler_free(&ctx->hdl); | |
384 | mutex_lock(&dev->dev_mutex); | |
385 | v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); | |
386 | mutex_unlock(&dev->dev_mutex); | |
387 | ||
388 | kfree(ctx->tpg_str_buf); | |
389 | kfree(ctx); | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
394 | static const struct v4l2_file_operations visl_fops = { | |
395 | .owner = THIS_MODULE, | |
396 | .open = visl_open, | |
397 | .release = visl_release, | |
398 | .poll = v4l2_m2m_fop_poll, | |
399 | .unlocked_ioctl = video_ioctl2, | |
400 | .mmap = v4l2_m2m_fop_mmap, | |
401 | }; | |
402 | ||
403 | static const struct video_device visl_videodev = { | |
404 | .name = VISL_NAME, | |
405 | .vfl_dir = VFL_DIR_M2M, | |
406 | .fops = &visl_fops, | |
407 | .ioctl_ops = &visl_ioctl_ops, | |
408 | .minor = -1, | |
409 | .release = visl_device_release, | |
410 | .device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING, | |
411 | }; | |
412 | ||
413 | static const struct v4l2_m2m_ops visl_m2m_ops = { | |
414 | .device_run = visl_device_run, | |
415 | }; | |
416 | ||
417 | static const struct media_device_ops visl_m2m_media_ops = { | |
418 | .req_validate = visl_request_validate, | |
419 | .req_queue = v4l2_m2m_request_queue, | |
420 | }; | |
421 | ||
422 | static int visl_probe(struct platform_device *pdev) | |
423 | { | |
424 | struct visl_dev *dev; | |
425 | struct video_device *vfd; | |
426 | int ret; | |
427 | int rc; | |
428 | ||
429 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
430 | if (!dev) | |
431 | return -ENOMEM; | |
432 | ||
433 | ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev); | |
434 | if (ret) | |
435 | goto error_visl_dev; | |
436 | ||
437 | mutex_init(&dev->dev_mutex); | |
438 | ||
439 | dev->vfd = visl_videodev; | |
440 | vfd = &dev->vfd; | |
441 | vfd->lock = &dev->dev_mutex; | |
442 | vfd->v4l2_dev = &dev->v4l2_dev; | |
443 | ||
444 | video_set_drvdata(vfd, dev); | |
445 | ||
446 | platform_set_drvdata(pdev, dev); | |
447 | ||
448 | dev->m2m_dev = v4l2_m2m_init(&visl_m2m_ops); | |
449 | if (IS_ERR(dev->m2m_dev)) { | |
450 | v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n"); | |
451 | ret = PTR_ERR(dev->m2m_dev); | |
452 | dev->m2m_dev = NULL; | |
453 | goto error_dev; | |
454 | } | |
455 | ||
456 | dev->mdev.dev = &pdev->dev; | |
457 | strscpy(dev->mdev.model, "visl", sizeof(dev->mdev.model)); | |
458 | strscpy(dev->mdev.bus_info, "platform:visl", | |
459 | sizeof(dev->mdev.bus_info)); | |
460 | media_device_init(&dev->mdev); | |
461 | dev->mdev.ops = &visl_m2m_media_ops; | |
462 | dev->v4l2_dev.mdev = &dev->mdev; | |
463 | ||
464 | ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1); | |
465 | if (ret) { | |
466 | v4l2_err(&dev->v4l2_dev, "Failed to register video device\n"); | |
467 | goto error_m2m; | |
468 | } | |
469 | ||
470 | v4l2_info(&dev->v4l2_dev, | |
471 | "Device registered as /dev/video%d\n", vfd->num); | |
472 | ||
473 | ret = v4l2_m2m_register_media_controller(dev->m2m_dev, vfd, | |
474 | MEDIA_ENT_F_PROC_VIDEO_DECODER); | |
475 | if (ret) { | |
476 | v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n"); | |
477 | goto error_v4l2; | |
478 | } | |
479 | ||
480 | ret = media_device_register(&dev->mdev); | |
481 | if (ret) { | |
482 | v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n"); | |
483 | goto error_m2m_mc; | |
484 | } | |
485 | ||
486 | rc = visl_debugfs_init(dev); | |
487 | if (rc) | |
488 | dprintk(dev, "visl_debugfs_init failed: %d\n" | |
489 | "Continuing without debugfs support\n", rc); | |
490 | ||
491 | return 0; | |
492 | ||
493 | error_m2m_mc: | |
494 | v4l2_m2m_unregister_media_controller(dev->m2m_dev); | |
495 | error_v4l2: | |
496 | video_unregister_device(&dev->vfd); | |
497 | /* visl_device_release called by video_unregister_device to release various objects */ | |
498 | return ret; | |
499 | error_m2m: | |
500 | v4l2_m2m_release(dev->m2m_dev); | |
501 | error_dev: | |
502 | v4l2_device_unregister(&dev->v4l2_dev); | |
503 | error_visl_dev: | |
504 | kfree(dev); | |
505 | ||
506 | return ret; | |
507 | } | |
508 | ||
1727b716 | 509 | static void visl_remove(struct platform_device *pdev) |
0c078e31 DA |
510 | { |
511 | struct visl_dev *dev = platform_get_drvdata(pdev); | |
512 | ||
513 | v4l2_info(&dev->v4l2_dev, "Removing " VISL_NAME); | |
514 | ||
515 | #ifdef CONFIG_MEDIA_CONTROLLER | |
516 | if (media_devnode_is_registered(dev->mdev.devnode)) { | |
517 | media_device_unregister(&dev->mdev); | |
518 | v4l2_m2m_unregister_media_controller(dev->m2m_dev); | |
519 | } | |
520 | #endif | |
521 | video_unregister_device(&dev->vfd); | |
0c078e31 DA |
522 | } |
523 | ||
524 | static struct platform_driver visl_pdrv = { | |
525 | .probe = visl_probe, | |
1727b716 | 526 | .remove_new = visl_remove, |
0c078e31 DA |
527 | .driver = { |
528 | .name = VISL_NAME, | |
529 | }, | |
530 | }; | |
531 | ||
532 | static void visl_dev_release(struct device *dev) {} | |
533 | ||
534 | static struct platform_device visl_pdev = { | |
535 | .name = VISL_NAME, | |
536 | .dev.release = visl_dev_release, | |
537 | }; | |
538 | ||
539 | static void __exit visl_exit(void) | |
540 | { | |
541 | platform_driver_unregister(&visl_pdrv); | |
542 | platform_device_unregister(&visl_pdev); | |
543 | } | |
544 | ||
545 | static int __init visl_init(void) | |
546 | { | |
547 | int ret; | |
548 | ||
549 | ret = platform_device_register(&visl_pdev); | |
550 | if (ret) | |
551 | return ret; | |
552 | ||
553 | ret = platform_driver_register(&visl_pdrv); | |
554 | if (ret) | |
555 | platform_device_unregister(&visl_pdev); | |
556 | ||
557 | return ret; | |
558 | } | |
559 | ||
560 | MODULE_DESCRIPTION("Virtual stateless decoder device"); | |
561 | MODULE_AUTHOR("Daniel Almeida <daniel.almeida@collabora.com>"); | |
562 | MODULE_LICENSE("GPL"); | |
563 | ||
564 | module_init(visl_init); | |
565 | module_exit(visl_exit); |