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7f98639d PO |
1 | /* |
2 | * Memory-to-memory device framework for Video for Linux 2. | |
3 | * | |
4 | * Helper functions for devices that use memory buffers for both source | |
5 | * and destination. | |
6 | * | |
7 | * Copyright (c) 2009 Samsung Electronics Co., Ltd. | |
95072084 | 8 | * Pawel Osciak, <pawel@osciak.com> |
7f98639d PO |
9 | * Marek Szyprowski, <m.szyprowski@samsung.com> |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the | |
14 | * License, or (at your option) any later version | |
15 | */ | |
16 | ||
17 | #ifndef _MEDIA_V4L2_MEM2MEM_H | |
18 | #define _MEDIA_V4L2_MEM2MEM_H | |
19 | ||
c139990e | 20 | #include <media/videobuf2-v4l2.h> |
7f98639d PO |
21 | |
22 | /** | |
23 | * struct v4l2_m2m_ops - mem-to-mem device driver callbacks | |
24 | * @device_run: required. Begin the actual job (transaction) inside this | |
25 | * callback. | |
26 | * The job does NOT have to end before this callback returns | |
27 | * (and it will be the usual case). When the job finishes, | |
28 | * v4l2_m2m_job_finish() has to be called. | |
29 | * @job_ready: optional. Should return 0 if the driver does not have a job | |
30 | * fully prepared to run yet (i.e. it will not be able to finish a | |
31 | * transaction without sleeping). If not provided, it will be | |
32 | * assumed that one source and one destination buffer are all | |
33 | * that is required for the driver to perform one full transaction. | |
34 | * This method may not sleep. | |
35 | * @job_abort: required. Informs the driver that it has to abort the currently | |
36 | * running transaction as soon as possible (i.e. as soon as it can | |
37 | * stop the device safely; e.g. in the next interrupt handler), | |
38 | * even if the transaction would not have been finished by then. | |
39 | * After the driver performs the necessary steps, it has to call | |
40 | * v4l2_m2m_job_finish() (as if the transaction ended normally). | |
41 | * This function does not have to (and will usually not) wait | |
42 | * until the device enters a state when it can be stopped. | |
62c0d016 | 43 | * @lock: optional. Define a driver's own lock callback, instead of using |
5fa5edbe | 44 | * &v4l2_m2m_ctx->q_lock. |
62c0d016 | 45 | * @unlock: optional. Define a driver's own unlock callback, instead of |
5fa5edbe | 46 | * using &v4l2_m2m_ctx->q_lock. |
7f98639d PO |
47 | */ |
48 | struct v4l2_m2m_ops { | |
49 | void (*device_run)(void *priv); | |
50 | int (*job_ready)(void *priv); | |
51 | void (*job_abort)(void *priv); | |
908a0d7c MS |
52 | void (*lock)(void *priv); |
53 | void (*unlock)(void *priv); | |
7f98639d PO |
54 | }; |
55 | ||
56 | struct v4l2_m2m_dev; | |
57 | ||
5fa5edbe MCC |
58 | /** |
59 | * struct v4l2_m2m_queue_ctx - represents a queue for buffers ready to be | |
60 | * processed | |
61 | * | |
62 | * @q: pointer to struct &vb2_queue | |
63 | * @rdy_queue: List of V4L2 mem-to-mem queues | |
64 | * @rdy_spinlock: spin lock to protect the struct usage | |
65 | * @num_rdy: number of buffers ready to be processed | |
66 | * @buffered: is the queue buffered? | |
67 | * | |
68 | * Queue for buffers ready to be processed as soon as this | |
69 | * instance receives access to the device. | |
70 | */ | |
71 | ||
7f98639d | 72 | struct v4l2_m2m_queue_ctx { |
908a0d7c | 73 | struct vb2_queue q; |
7f98639d | 74 | |
7f98639d | 75 | struct list_head rdy_queue; |
908a0d7c | 76 | spinlock_t rdy_spinlock; |
7f98639d | 77 | u8 num_rdy; |
33bdd5a8 | 78 | bool buffered; |
7f98639d PO |
79 | }; |
80 | ||
5fa5edbe MCC |
81 | /** |
82 | * struct v4l2_m2m_ctx - Memory to memory context structure | |
83 | * | |
84 | * @q_lock: struct &mutex lock | |
9f8d3a2e | 85 | * @m2m_dev: opaque pointer to the internal data to handle M2M context |
5fa5edbe MCC |
86 | * @cap_q_ctx: Capture (output to memory) queue context |
87 | * @out_q_ctx: Output (input from memory) queue context | |
88 | * @queue: List of memory to memory contexts | |
89 | * @job_flags: Job queue flags, used internally by v4l2-mem2mem.c: | |
90 | * %TRANS_QUEUED, %TRANS_RUNNING and %TRANS_ABORT. | |
91 | * @finished: Wait queue used to signalize when a job queue finished. | |
92 | * @priv: Instance private data | |
93 | */ | |
7f98639d | 94 | struct v4l2_m2m_ctx { |
8e6e8f93 SN |
95 | /* optional cap/out vb2 queues lock */ |
96 | struct mutex *q_lock; | |
97 | ||
5fa5edbe | 98 | /* internal use only */ |
7f98639d PO |
99 | struct v4l2_m2m_dev *m2m_dev; |
100 | ||
7f98639d PO |
101 | struct v4l2_m2m_queue_ctx cap_q_ctx; |
102 | ||
7f98639d PO |
103 | struct v4l2_m2m_queue_ctx out_q_ctx; |
104 | ||
105 | /* For device job queue */ | |
106 | struct list_head queue; | |
107 | unsigned long job_flags; | |
908a0d7c | 108 | wait_queue_head_t finished; |
7f98639d | 109 | |
7f98639d PO |
110 | void *priv; |
111 | }; | |
112 | ||
5fa5edbe MCC |
113 | /** |
114 | * struct v4l2_m2m_buffer - Memory to memory buffer | |
115 | * | |
116 | * @vb: pointer to struct &vb2_v4l2_buffer | |
117 | * @list: list of m2m buffers | |
118 | */ | |
908a0d7c | 119 | struct v4l2_m2m_buffer { |
2d700715 | 120 | struct vb2_v4l2_buffer vb; |
908a0d7c MS |
121 | struct list_head list; |
122 | }; | |
123 | ||
4781646c MCC |
124 | /** |
125 | * v4l2_m2m_get_curr_priv() - return driver private data for the currently | |
126 | * running instance or NULL if no instance is running | |
dcbd8735 | 127 | * |
9f8d3a2e | 128 | * @m2m_dev: opaque pointer to the internal data to handle M2M context |
4781646c | 129 | */ |
7f98639d PO |
130 | void *v4l2_m2m_get_curr_priv(struct v4l2_m2m_dev *m2m_dev); |
131 | ||
4781646c MCC |
132 | /** |
133 | * v4l2_m2m_get_vq() - return vb2_queue for the given type | |
dcbd8735 MCC |
134 | * |
135 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
136 | * @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type | |
4781646c | 137 | */ |
908a0d7c | 138 | struct vb2_queue *v4l2_m2m_get_vq(struct v4l2_m2m_ctx *m2m_ctx, |
7f98639d PO |
139 | enum v4l2_buf_type type); |
140 | ||
4781646c MCC |
141 | /** |
142 | * v4l2_m2m_try_schedule() - check whether an instance is ready to be added to | |
143 | * the pending job queue and add it if so. | |
dcbd8735 MCC |
144 | * |
145 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
4781646c MCC |
146 | * |
147 | * There are three basic requirements an instance has to meet to be able to run: | |
148 | * 1) at least one source buffer has to be queued, | |
149 | * 2) at least one destination buffer has to be queued, | |
150 | * 3) streaming has to be on. | |
151 | * | |
152 | * If a queue is buffered (for example a decoder hardware ringbuffer that has | |
153 | * to be drained before doing streamoff), allow scheduling without v4l2 buffers | |
154 | * on that queue. | |
155 | * | |
156 | * There may also be additional, custom requirements. In such case the driver | |
157 | * should supply a custom callback (job_ready in v4l2_m2m_ops) that should | |
158 | * return 1 if the instance is ready. | |
159 | * An example of the above could be an instance that requires more than one | |
160 | * src/dst buffer per transaction. | |
161 | */ | |
1190a419 MO |
162 | void v4l2_m2m_try_schedule(struct v4l2_m2m_ctx *m2m_ctx); |
163 | ||
4781646c MCC |
164 | /** |
165 | * v4l2_m2m_job_finish() - inform the framework that a job has been finished | |
166 | * and have it clean up | |
167 | * | |
9f8d3a2e | 168 | * @m2m_dev: opaque pointer to the internal data to handle M2M context |
dcbd8735 MCC |
169 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
170 | * | |
4781646c MCC |
171 | * Called by a driver to yield back the device after it has finished with it. |
172 | * Should be called as soon as possible after reaching a state which allows | |
173 | * other instances to take control of the device. | |
174 | * | |
5fa5edbe MCC |
175 | * This function has to be called only after &v4l2_m2m_ops->device_run |
176 | * callback has been called on the driver. To prevent recursion, it should | |
177 | * not be called directly from the &v4l2_m2m_ops->device_run callback though. | |
4781646c | 178 | */ |
7f98639d PO |
179 | void v4l2_m2m_job_finish(struct v4l2_m2m_dev *m2m_dev, |
180 | struct v4l2_m2m_ctx *m2m_ctx); | |
181 | ||
908a0d7c | 182 | static inline void |
2d700715 | 183 | v4l2_m2m_buf_done(struct vb2_v4l2_buffer *buf, enum vb2_buffer_state state) |
908a0d7c | 184 | { |
2d700715 | 185 | vb2_buffer_done(&buf->vb2_buf, state); |
908a0d7c MS |
186 | } |
187 | ||
4781646c MCC |
188 | /** |
189 | * v4l2_m2m_reqbufs() - multi-queue-aware REQBUFS multiplexer | |
dcbd8735 MCC |
190 | * |
191 | * @file: pointer to struct &file | |
192 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
193 | * @reqbufs: pointer to struct &v4l2_requestbuffers | |
4781646c | 194 | */ |
7f98639d PO |
195 | int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
196 | struct v4l2_requestbuffers *reqbufs); | |
197 | ||
4781646c MCC |
198 | /** |
199 | * v4l2_m2m_querybuf() - multi-queue-aware QUERYBUF multiplexer | |
200 | * | |
dcbd8735 MCC |
201 | * @file: pointer to struct &file |
202 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
203 | * @buf: pointer to struct &v4l2_buffer | |
204 | * | |
4781646c MCC |
205 | * See v4l2_m2m_mmap() documentation for details. |
206 | */ | |
7f98639d PO |
207 | int v4l2_m2m_querybuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
208 | struct v4l2_buffer *buf); | |
209 | ||
4781646c MCC |
210 | /** |
211 | * v4l2_m2m_qbuf() - enqueue a source or destination buffer, depending on | |
212 | * the type | |
dcbd8735 MCC |
213 | * |
214 | * @file: pointer to struct &file | |
215 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
216 | * @buf: pointer to struct &v4l2_buffer | |
4781646c | 217 | */ |
7f98639d PO |
218 | int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
219 | struct v4l2_buffer *buf); | |
4781646c MCC |
220 | |
221 | /** | |
222 | * v4l2_m2m_dqbuf() - dequeue a source or destination buffer, depending on | |
223 | * the type | |
dcbd8735 MCC |
224 | * |
225 | * @file: pointer to struct &file | |
226 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
227 | * @buf: pointer to struct &v4l2_buffer | |
4781646c | 228 | */ |
7f98639d PO |
229 | int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
230 | struct v4l2_buffer *buf); | |
4781646c MCC |
231 | |
232 | /** | |
233 | * v4l2_m2m_prepare_buf() - prepare a source or destination buffer, depending on | |
234 | * the type | |
dcbd8735 MCC |
235 | * |
236 | * @file: pointer to struct &file | |
237 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
238 | * @buf: pointer to struct &v4l2_buffer | |
4781646c | 239 | */ |
e68cf471 HV |
240 | int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
241 | struct v4l2_buffer *buf); | |
4781646c MCC |
242 | |
243 | /** | |
244 | * v4l2_m2m_create_bufs() - create a source or destination buffer, depending | |
245 | * on the type | |
dcbd8735 MCC |
246 | * |
247 | * @file: pointer to struct &file | |
248 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
249 | * @create: pointer to struct &v4l2_create_buffers | |
4781646c | 250 | */ |
8b94ca61 PZ |
251 | int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
252 | struct v4l2_create_buffers *create); | |
7f98639d | 253 | |
4781646c MCC |
254 | /** |
255 | * v4l2_m2m_expbuf() - export a source or destination buffer, depending on | |
256 | * the type | |
dcbd8735 MCC |
257 | * |
258 | * @file: pointer to struct &file | |
259 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
260 | * @eb: pointer to struct &v4l2_exportbuffer | |
4781646c | 261 | */ |
83ae7c5a TS |
262 | int v4l2_m2m_expbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
263 | struct v4l2_exportbuffer *eb); | |
264 | ||
4781646c MCC |
265 | /** |
266 | * v4l2_m2m_streamon() - turn on streaming for a video queue | |
dcbd8735 MCC |
267 | * |
268 | * @file: pointer to struct &file | |
269 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
270 | * @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type | |
4781646c | 271 | */ |
7f98639d PO |
272 | int v4l2_m2m_streamon(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
273 | enum v4l2_buf_type type); | |
4781646c MCC |
274 | |
275 | /** | |
276 | * v4l2_m2m_streamoff() - turn off streaming for a video queue | |
dcbd8735 MCC |
277 | * |
278 | * @file: pointer to struct &file | |
279 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
280 | * @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type | |
4781646c | 281 | */ |
7f98639d PO |
282 | int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
283 | enum v4l2_buf_type type); | |
284 | ||
4781646c MCC |
285 | /** |
286 | * v4l2_m2m_poll() - poll replacement, for destination buffers only | |
287 | * | |
dcbd8735 MCC |
288 | * @file: pointer to struct &file |
289 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
290 | * @wait: pointer to struct &poll_table_struct | |
291 | * | |
4781646c MCC |
292 | * Call from the driver's poll() function. Will poll both queues. If a buffer |
293 | * is available to dequeue (with dqbuf) from the source queue, this will | |
294 | * indicate that a non-blocking write can be performed, while read will be | |
295 | * returned in case of the destination queue. | |
296 | */ | |
7f98639d PO |
297 | unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
298 | struct poll_table_struct *wait); | |
299 | ||
4781646c MCC |
300 | /** |
301 | * v4l2_m2m_mmap() - source and destination queues-aware mmap multiplexer | |
302 | * | |
dcbd8735 MCC |
303 | * @file: pointer to struct &file |
304 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx | |
305 | * @vma: pointer to struct &vm_area_struct | |
306 | * | |
4781646c MCC |
307 | * Call from driver's mmap() function. Will handle mmap() for both queues |
308 | * seamlessly for videobuffer, which will receive normal per-queue offsets and | |
309 | * proper videobuf queue pointers. The differentiation is made outside videobuf | |
310 | * by adding a predefined offset to buffers from one of the queues and | |
311 | * subtracting it before passing it back to videobuf. Only drivers (and | |
312 | * thus applications) receive modified offsets. | |
313 | */ | |
7f98639d PO |
314 | int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
315 | struct vm_area_struct *vma); | |
316 | ||
4781646c MCC |
317 | /** |
318 | * v4l2_m2m_init() - initialize per-driver m2m data | |
319 | * | |
dcbd8735 MCC |
320 | * @m2m_ops: pointer to struct v4l2_m2m_ops |
321 | * | |
5fa5edbe MCC |
322 | * Usually called from driver's ``probe()`` function. |
323 | * | |
324 | * Return: returns an opaque pointer to the internal data to handle M2M context | |
4781646c | 325 | */ |
b1252eb8 | 326 | struct v4l2_m2m_dev *v4l2_m2m_init(const struct v4l2_m2m_ops *m2m_ops); |
4781646c MCC |
327 | |
328 | /** | |
329 | * v4l2_m2m_release() - cleans up and frees a m2m_dev structure | |
330 | * | |
9f8d3a2e | 331 | * @m2m_dev: opaque pointer to the internal data to handle M2M context |
dcbd8735 | 332 | * |
5fa5edbe | 333 | * Usually called from driver's ``remove()`` function. |
4781646c | 334 | */ |
7f98639d PO |
335 | void v4l2_m2m_release(struct v4l2_m2m_dev *m2m_dev); |
336 | ||
4781646c MCC |
337 | /** |
338 | * v4l2_m2m_ctx_init() - allocate and initialize a m2m context | |
dcbd8735 | 339 | * |
9f8d3a2e | 340 | * @m2m_dev: opaque pointer to the internal data to handle M2M context |
dcbd8735 MCC |
341 | * @drv_priv: driver's instance private data |
342 | * @queue_init: a callback for queue type-specific initialization function | |
343 | * to be used for initializing videobuf_queues | |
4781646c | 344 | * |
5fa5edbe | 345 | * Usually called from driver's ``open()`` function. |
4781646c | 346 | */ |
908a0d7c MS |
347 | struct v4l2_m2m_ctx *v4l2_m2m_ctx_init(struct v4l2_m2m_dev *m2m_dev, |
348 | void *drv_priv, | |
349 | int (*queue_init)(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)); | |
350 | ||
33bdd5a8 PZ |
351 | static inline void v4l2_m2m_set_src_buffered(struct v4l2_m2m_ctx *m2m_ctx, |
352 | bool buffered) | |
353 | { | |
354 | m2m_ctx->out_q_ctx.buffered = buffered; | |
355 | } | |
356 | ||
357 | static inline void v4l2_m2m_set_dst_buffered(struct v4l2_m2m_ctx *m2m_ctx, | |
358 | bool buffered) | |
359 | { | |
360 | m2m_ctx->cap_q_ctx.buffered = buffered; | |
361 | } | |
362 | ||
4781646c MCC |
363 | /** |
364 | * v4l2_m2m_ctx_release() - release m2m context | |
365 | * | |
dcbd8735 MCC |
366 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
367 | * | |
4781646c MCC |
368 | * Usually called from driver's release() function. |
369 | */ | |
7f98639d PO |
370 | void v4l2_m2m_ctx_release(struct v4l2_m2m_ctx *m2m_ctx); |
371 | ||
4781646c MCC |
372 | /** |
373 | * v4l2_m2m_buf_queue() - add a buffer to the proper ready buffers list. | |
374 | * | |
dcbd8735 MCC |
375 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
376 | * @vbuf: pointer to struct &vb2_v4l2_buffer | |
377 | * | |
5fa5edbe | 378 | * Call from videobuf_queue_ops->ops->buf_queue, videobuf_queue_ops callback. |
4781646c | 379 | */ |
2d700715 JS |
380 | void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, |
381 | struct vb2_v4l2_buffer *vbuf); | |
7f98639d PO |
382 | |
383 | /** | |
384 | * v4l2_m2m_num_src_bufs_ready() - return the number of source buffers ready for | |
385 | * use | |
62c0d016 | 386 | * |
dcbd8735 | 387 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
7f98639d PO |
388 | */ |
389 | static inline | |
390 | unsigned int v4l2_m2m_num_src_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx) | |
391 | { | |
961ae449 | 392 | return m2m_ctx->out_q_ctx.num_rdy; |
7f98639d PO |
393 | } |
394 | ||
395 | /** | |
396 | * v4l2_m2m_num_src_bufs_ready() - return the number of destination buffers | |
397 | * ready for use | |
62c0d016 | 398 | * |
dcbd8735 | 399 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
7f98639d PO |
400 | */ |
401 | static inline | |
402 | unsigned int v4l2_m2m_num_dst_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx) | |
403 | { | |
961ae449 | 404 | return m2m_ctx->cap_q_ctx.num_rdy; |
7f98639d PO |
405 | } |
406 | ||
4781646c MCC |
407 | /** |
408 | * v4l2_m2m_next_buf() - return next buffer from the list of ready buffers | |
dcbd8735 MCC |
409 | * |
410 | * @q_ctx: pointer to struct @v4l2_m2m_queue_ctx | |
4781646c | 411 | */ |
908a0d7c | 412 | void *v4l2_m2m_next_buf(struct v4l2_m2m_queue_ctx *q_ctx); |
7f98639d PO |
413 | |
414 | /** | |
415 | * v4l2_m2m_next_src_buf() - return next source buffer from the list of ready | |
416 | * buffers | |
62c0d016 | 417 | * |
dcbd8735 | 418 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
7f98639d PO |
419 | */ |
420 | static inline void *v4l2_m2m_next_src_buf(struct v4l2_m2m_ctx *m2m_ctx) | |
421 | { | |
908a0d7c | 422 | return v4l2_m2m_next_buf(&m2m_ctx->out_q_ctx); |
7f98639d PO |
423 | } |
424 | ||
425 | /** | |
426 | * v4l2_m2m_next_dst_buf() - return next destination buffer from the list of | |
427 | * ready buffers | |
62c0d016 | 428 | * |
dcbd8735 | 429 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
7f98639d PO |
430 | */ |
431 | static inline void *v4l2_m2m_next_dst_buf(struct v4l2_m2m_ctx *m2m_ctx) | |
432 | { | |
908a0d7c | 433 | return v4l2_m2m_next_buf(&m2m_ctx->cap_q_ctx); |
7f98639d PO |
434 | } |
435 | ||
436 | /** | |
908a0d7c | 437 | * v4l2_m2m_get_src_vq() - return vb2_queue for source buffers |
62c0d016 | 438 | * |
dcbd8735 | 439 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
7f98639d PO |
440 | */ |
441 | static inline | |
908a0d7c | 442 | struct vb2_queue *v4l2_m2m_get_src_vq(struct v4l2_m2m_ctx *m2m_ctx) |
7f98639d | 443 | { |
908a0d7c | 444 | return &m2m_ctx->out_q_ctx.q; |
7f98639d PO |
445 | } |
446 | ||
447 | /** | |
908a0d7c | 448 | * v4l2_m2m_get_dst_vq() - return vb2_queue for destination buffers |
62c0d016 | 449 | * |
dcbd8735 | 450 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
7f98639d PO |
451 | */ |
452 | static inline | |
908a0d7c | 453 | struct vb2_queue *v4l2_m2m_get_dst_vq(struct v4l2_m2m_ctx *m2m_ctx) |
7f98639d | 454 | { |
908a0d7c | 455 | return &m2m_ctx->cap_q_ctx.q; |
7f98639d PO |
456 | } |
457 | ||
4781646c MCC |
458 | /** |
459 | * v4l2_m2m_buf_remove() - take off a buffer from the list of ready buffers and | |
460 | * return it | |
dcbd8735 MCC |
461 | * |
462 | * @q_ctx: pointer to struct @v4l2_m2m_queue_ctx | |
4781646c | 463 | */ |
908a0d7c | 464 | void *v4l2_m2m_buf_remove(struct v4l2_m2m_queue_ctx *q_ctx); |
7f98639d PO |
465 | |
466 | /** | |
467 | * v4l2_m2m_src_buf_remove() - take off a source buffer from the list of ready | |
468 | * buffers and return it | |
62c0d016 | 469 | * |
dcbd8735 | 470 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
7f98639d PO |
471 | */ |
472 | static inline void *v4l2_m2m_src_buf_remove(struct v4l2_m2m_ctx *m2m_ctx) | |
473 | { | |
908a0d7c | 474 | return v4l2_m2m_buf_remove(&m2m_ctx->out_q_ctx); |
7f98639d PO |
475 | } |
476 | ||
477 | /** | |
478 | * v4l2_m2m_dst_buf_remove() - take off a destination buffer from the list of | |
479 | * ready buffers and return it | |
62c0d016 | 480 | * |
dcbd8735 | 481 | * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
7f98639d PO |
482 | */ |
483 | static inline void *v4l2_m2m_dst_buf_remove(struct v4l2_m2m_ctx *m2m_ctx) | |
484 | { | |
908a0d7c | 485 | return v4l2_m2m_buf_remove(&m2m_ctx->cap_q_ctx); |
7f98639d PO |
486 | } |
487 | ||
8e6e8f93 SN |
488 | /* v4l2 ioctl helpers */ |
489 | ||
490 | int v4l2_m2m_ioctl_reqbufs(struct file *file, void *priv, | |
491 | struct v4l2_requestbuffers *rb); | |
492 | int v4l2_m2m_ioctl_create_bufs(struct file *file, void *fh, | |
493 | struct v4l2_create_buffers *create); | |
494 | int v4l2_m2m_ioctl_querybuf(struct file *file, void *fh, | |
495 | struct v4l2_buffer *buf); | |
496 | int v4l2_m2m_ioctl_expbuf(struct file *file, void *fh, | |
497 | struct v4l2_exportbuffer *eb); | |
498 | int v4l2_m2m_ioctl_qbuf(struct file *file, void *fh, | |
499 | struct v4l2_buffer *buf); | |
500 | int v4l2_m2m_ioctl_dqbuf(struct file *file, void *fh, | |
501 | struct v4l2_buffer *buf); | |
e68cf471 HV |
502 | int v4l2_m2m_ioctl_prepare_buf(struct file *file, void *fh, |
503 | struct v4l2_buffer *buf); | |
8e6e8f93 SN |
504 | int v4l2_m2m_ioctl_streamon(struct file *file, void *fh, |
505 | enum v4l2_buf_type type); | |
506 | int v4l2_m2m_ioctl_streamoff(struct file *file, void *fh, | |
507 | enum v4l2_buf_type type); | |
508 | int v4l2_m2m_fop_mmap(struct file *file, struct vm_area_struct *vma); | |
509 | unsigned int v4l2_m2m_fop_poll(struct file *file, poll_table *wait); | |
510 | ||
7f98639d PO |
511 | #endif /* _MEDIA_V4L2_MEM2MEM_H */ |
512 |