1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * TI OMAP4 ISS V4L2 Driver - Generic video node |
4 | * |
5 | * Copyright (C) 2012 Texas Instruments, Inc. |
6 | * |
7 | * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com> |
8 | */ |
9 | |
10 | #include <linux/clk.h> |
11 | #include <linux/mm.h> |
12 | #include <linux/pagemap.h> |
13 | #include <linux/sched.h> |
14 | #include <linux/slab.h> |
15 | #include <linux/vmalloc.h> |
16 | #include <linux/module.h> |
17 | |
18 | #include <media/v4l2-dev.h> |
19 | #include <media/v4l2-ioctl.h> |
20 | #include <media/v4l2-mc.h> |
21 | |
22 | #include "iss_video.h" |
23 | #include "iss.h" |
24 | |
25 | /* ----------------------------------------------------------------------------- |
26 | * Helper functions |
27 | */ |
28 | |
29 | static struct iss_format_info formats[] = { |
30 | { MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8, |
31 | MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8, |
32 | V4L2_PIX_FMT_GREY, 8, }, |
33 | { MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10, |
34 | MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y8_1X8, |
35 | V4L2_PIX_FMT_Y10, 10, }, |
36 | { MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y10_1X10, |
37 | MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y8_1X8, |
38 | V4L2_PIX_FMT_Y12, 12, }, |
39 | { MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8, |
40 | MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8, |
41 | V4L2_PIX_FMT_SBGGR8, 8, }, |
42 | { MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8, |
43 | MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8, |
44 | V4L2_PIX_FMT_SGBRG8, 8, }, |
45 | { MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8, |
46 | MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8, |
47 | V4L2_PIX_FMT_SGRBG8, 8, }, |
48 | { MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8, |
49 | MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8, |
50 | V4L2_PIX_FMT_SRGGB8, 8, }, |
51 | { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, |
52 | MEDIA_BUS_FMT_SGRBG10_1X10, 0, |
53 | V4L2_PIX_FMT_SGRBG10DPCM8, 8, }, |
54 | { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10, |
55 | MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR8_1X8, |
56 | V4L2_PIX_FMT_SBGGR10, 10, }, |
57 | { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10, |
58 | MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG8_1X8, |
59 | V4L2_PIX_FMT_SGBRG10, 10, }, |
60 | { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10, |
61 | MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG8_1X8, |
62 | V4L2_PIX_FMT_SGRBG10, 10, }, |
63 | { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10, |
64 | MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB8_1X8, |
65 | V4L2_PIX_FMT_SRGGB10, 10, }, |
66 | { MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR10_1X10, |
67 | MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR8_1X8, |
68 | V4L2_PIX_FMT_SBGGR12, 12, }, |
69 | { MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG10_1X10, |
70 | MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG8_1X8, |
71 | V4L2_PIX_FMT_SGBRG12, 12, }, |
72 | { MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG10_1X10, |
73 | MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG8_1X8, |
74 | V4L2_PIX_FMT_SGRBG12, 12, }, |
75 | { MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB10_1X10, |
76 | MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB8_1X8, |
77 | V4L2_PIX_FMT_SRGGB12, 12, }, |
78 | { MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16, |
79 | MEDIA_BUS_FMT_UYVY8_1X16, 0, |
80 | V4L2_PIX_FMT_UYVY, 16, }, |
81 | { MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16, |
82 | MEDIA_BUS_FMT_YUYV8_1X16, 0, |
83 | V4L2_PIX_FMT_YUYV, 16, }, |
84 | { MEDIA_BUS_FMT_YUYV8_1_5X8, MEDIA_BUS_FMT_YUYV8_1_5X8, |
85 | MEDIA_BUS_FMT_YUYV8_1_5X8, 0, |
86 | V4L2_PIX_FMT_NV12, 8, }, |
87 | }; |
88 | |
89 | const struct iss_format_info * |
90 | omap4iss_video_format_info(u32 code) |
91 | { |
92 | unsigned int i; |
93 | |
94 | for (i = 0; i < ARRAY_SIZE(formats); ++i) { |
95 | if (formats[i].code == code) |
96 | return &formats[i]; |
97 | } |
98 | |
99 | return NULL; |
100 | } |
101 | |
102 | /* |
103 | * iss_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format |
104 | * @video: ISS video instance |
105 | * @mbus: v4l2_mbus_framefmt format (input) |
106 | * @pix: v4l2_pix_format format (output) |
107 | * |
108 | * Fill the output pix structure with information from the input mbus format. |
109 | * The bytesperline and sizeimage fields are computed from the requested bytes |
110 | * per line value in the pix format and information from the video instance. |
111 | * |
112 | * Return the number of padding bytes at end of line. |
113 | */ |
114 | static unsigned int iss_video_mbus_to_pix(const struct iss_video *video, |
115 | const struct v4l2_mbus_framefmt *mbus, |
116 | struct v4l2_pix_format *pix) |
117 | { |
118 | unsigned int bpl = pix->bytesperline; |
119 | unsigned int min_bpl; |
120 | unsigned int i; |
121 | |
122 | memset(pix, 0, sizeof(*pix)); |
123 | pix->width = mbus->width; |
124 | pix->height = mbus->height; |
125 | |
126 | /* |
127 | * Skip the last format in the loop so that it will be selected if no |
128 | * match is found. |
129 | */ |
130 | for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) { |
131 | if (formats[i].code == mbus->code) |
132 | break; |
133 | } |
134 | |
135 | min_bpl = pix->width * ALIGN(formats[i].bpp, 8) / 8; |
136 | |
137 | /* |
138 | * Clamp the requested bytes per line value. If the maximum bytes per |
139 | * line value is zero, the module doesn't support user configurable line |
140 | * sizes. Override the requested value with the minimum in that case. |
141 | */ |
142 | if (video->bpl_max) |
143 | bpl = clamp(bpl, min_bpl, video->bpl_max); |
144 | else |
145 | bpl = min_bpl; |
146 | |
147 | if (!video->bpl_zero_padding || bpl != min_bpl) |
148 | bpl = ALIGN(bpl, video->bpl_alignment); |
149 | |
150 | pix->pixelformat = formats[i].pixelformat; |
151 | pix->bytesperline = bpl; |
152 | pix->sizeimage = pix->bytesperline * pix->height; |
153 | pix->colorspace = mbus->colorspace; |
154 | pix->field = mbus->field; |
155 | |
156 | /* FIXME: Special case for NV12! We should make this nicer... */ |
157 | if (pix->pixelformat == V4L2_PIX_FMT_NV12) |
158 | pix->sizeimage += (pix->bytesperline * pix->height) / 2; |
159 | |
160 | return bpl - min_bpl; |
161 | } |
162 | |
163 | static void iss_video_pix_to_mbus(const struct v4l2_pix_format *pix, |
164 | struct v4l2_mbus_framefmt *mbus) |
165 | { |
166 | unsigned int i; |
167 | |
168 | memset(mbus, 0, sizeof(*mbus)); |
169 | mbus->width = pix->width; |
170 | mbus->height = pix->height; |
171 | |
172 | /* |
173 | * Skip the last format in the loop so that it will be selected if no |
174 | * match is found. |
175 | */ |
176 | for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) { |
177 | if (formats[i].pixelformat == pix->pixelformat) |
178 | break; |
179 | } |
180 | |
181 | mbus->code = formats[i].code; |
182 | mbus->colorspace = pix->colorspace; |
183 | mbus->field = pix->field; |
184 | } |
185 | |
186 | static struct v4l2_subdev * |
187 | iss_video_remote_subdev(struct iss_video *video, u32 *pad) |
188 | { |
189 | struct media_pad *remote; |
190 | |
191 | remote = media_pad_remote_pad_first(pad: &video->pad); |
192 | |
193 | if (!remote || !is_media_entity_v4l2_subdev(entity: remote->entity)) |
194 | return NULL; |
195 | |
196 | if (pad) |
197 | *pad = remote->index; |
198 | |
199 | return media_entity_to_v4l2_subdev(remote->entity); |
200 | } |
201 | |
202 | /* Return a pointer to the ISS video instance at the far end of the pipeline. */ |
203 | static struct iss_video * |
204 | iss_video_far_end(struct iss_video *video, struct iss_pipeline *pipe) |
205 | { |
206 | struct media_pipeline_entity_iter iter; |
207 | struct media_entity *entity; |
208 | struct iss_video *far_end = NULL; |
209 | int ret; |
210 | |
211 | ret = media_pipeline_entity_iter_init(pipe: &pipe->pipe, iter: &iter); |
212 | if (ret) |
213 | return ERR_PTR(error: -ENOMEM); |
214 | |
215 | media_pipeline_for_each_entity(&pipe->pipe, &iter, entity) { |
216 | struct iss_video *other; |
217 | |
218 | if (entity == &video->video.entity) |
219 | continue; |
220 | |
221 | if (!is_media_entity_v4l2_video_device(entity)) |
222 | continue; |
223 | |
224 | other = to_iss_video(media_entity_to_video_device(entity)); |
225 | if (other->type != video->type) { |
226 | far_end = other; |
227 | break; |
228 | } |
229 | } |
230 | |
231 | media_pipeline_entity_iter_cleanup(iter: &iter); |
232 | |
233 | return far_end; |
234 | } |
235 | |
236 | static int |
237 | __iss_video_get_format(struct iss_video *video, |
238 | struct v4l2_mbus_framefmt *format) |
239 | { |
240 | struct v4l2_subdev_format fmt = { |
241 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
242 | }; |
243 | struct v4l2_subdev *subdev; |
244 | u32 pad; |
245 | int ret; |
246 | |
247 | subdev = iss_video_remote_subdev(video, pad: &pad); |
248 | if (!subdev) |
249 | return -EINVAL; |
250 | |
251 | fmt.pad = pad; |
252 | |
253 | mutex_lock(&video->mutex); |
254 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); |
255 | mutex_unlock(lock: &video->mutex); |
256 | |
257 | if (ret) |
258 | return ret; |
259 | |
260 | *format = fmt.format; |
261 | return 0; |
262 | } |
263 | |
264 | static int |
265 | iss_video_check_format(struct iss_video *video, struct iss_video_fh *vfh) |
266 | { |
267 | struct v4l2_mbus_framefmt format; |
268 | struct v4l2_pix_format pixfmt; |
269 | int ret; |
270 | |
271 | ret = __iss_video_get_format(video, format: &format); |
272 | if (ret < 0) |
273 | return ret; |
274 | |
275 | pixfmt.bytesperline = 0; |
276 | ret = iss_video_mbus_to_pix(video, mbus: &format, pix: &pixfmt); |
277 | |
278 | if (vfh->format.fmt.pix.pixelformat != pixfmt.pixelformat || |
279 | vfh->format.fmt.pix.height != pixfmt.height || |
280 | vfh->format.fmt.pix.width != pixfmt.width || |
281 | vfh->format.fmt.pix.bytesperline != pixfmt.bytesperline || |
282 | vfh->format.fmt.pix.sizeimage != pixfmt.sizeimage) |
283 | return -EINVAL; |
284 | |
285 | return ret; |
286 | } |
287 | |
288 | /* ----------------------------------------------------------------------------- |
289 | * Video queue operations |
290 | */ |
291 | |
292 | static int iss_video_queue_setup(struct vb2_queue *vq, |
293 | unsigned int *count, unsigned int *num_planes, |
294 | unsigned int sizes[], |
295 | struct device *alloc_devs[]) |
296 | { |
297 | struct iss_video_fh *vfh = vb2_get_drv_priv(q: vq); |
298 | struct iss_video *video = vfh->video; |
299 | |
300 | /* Revisit multi-planar support for NV12 */ |
301 | *num_planes = 1; |
302 | |
303 | sizes[0] = vfh->format.fmt.pix.sizeimage; |
304 | if (sizes[0] == 0) |
305 | return -EINVAL; |
306 | |
307 | *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0])); |
308 | |
309 | return 0; |
310 | } |
311 | |
312 | static void iss_video_buf_cleanup(struct vb2_buffer *vb) |
313 | { |
314 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
315 | struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb); |
316 | |
317 | if (buffer->iss_addr) |
318 | buffer->iss_addr = 0; |
319 | } |
320 | |
321 | static int iss_video_buf_prepare(struct vb2_buffer *vb) |
322 | { |
323 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
324 | struct iss_video_fh *vfh = vb2_get_drv_priv(q: vb->vb2_queue); |
325 | struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb); |
326 | struct iss_video *video = vfh->video; |
327 | unsigned long size = vfh->format.fmt.pix.sizeimage; |
328 | dma_addr_t addr; |
329 | |
330 | if (vb2_plane_size(vb, plane_no: 0) < size) |
331 | return -ENOBUFS; |
332 | |
333 | addr = vb2_dma_contig_plane_dma_addr(vb, plane_no: 0); |
334 | if (!IS_ALIGNED(addr, 32)) { |
335 | dev_dbg(video->iss->dev, |
336 | "Buffer address must be aligned to 32 bytes boundary.\n" ); |
337 | return -EINVAL; |
338 | } |
339 | |
340 | vb2_set_plane_payload(vb, plane_no: 0, size); |
341 | buffer->iss_addr = addr; |
342 | return 0; |
343 | } |
344 | |
345 | static void iss_video_buf_queue(struct vb2_buffer *vb) |
346 | { |
347 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
348 | struct iss_video_fh *vfh = vb2_get_drv_priv(q: vb->vb2_queue); |
349 | struct iss_video *video = vfh->video; |
350 | struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb); |
351 | struct iss_pipeline *pipe = to_iss_pipeline(entity: &video->video.entity); |
352 | unsigned long flags; |
353 | bool empty; |
354 | |
355 | spin_lock_irqsave(&video->qlock, flags); |
356 | |
357 | /* |
358 | * Mark the buffer is faulty and give it back to the queue immediately |
359 | * if the video node has registered an error. vb2 will perform the same |
360 | * check when preparing the buffer, but that is inherently racy, so we |
361 | * need to handle the race condition with an authoritative check here. |
362 | */ |
363 | if (unlikely(video->error)) { |
364 | vb2_buffer_done(vb, state: VB2_BUF_STATE_ERROR); |
365 | spin_unlock_irqrestore(lock: &video->qlock, flags); |
366 | return; |
367 | } |
368 | |
369 | empty = list_empty(head: &video->dmaqueue); |
370 | list_add_tail(new: &buffer->list, head: &video->dmaqueue); |
371 | |
372 | spin_unlock_irqrestore(lock: &video->qlock, flags); |
373 | |
374 | if (empty) { |
375 | enum iss_pipeline_state state; |
376 | unsigned int start; |
377 | |
378 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
379 | state = ISS_PIPELINE_QUEUE_OUTPUT; |
380 | else |
381 | state = ISS_PIPELINE_QUEUE_INPUT; |
382 | |
383 | spin_lock_irqsave(&pipe->lock, flags); |
384 | pipe->state |= state; |
385 | video->ops->queue(video, buffer); |
386 | video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_QUEUED; |
387 | |
388 | start = iss_pipeline_ready(pipe); |
389 | if (start) |
390 | pipe->state |= ISS_PIPELINE_STREAM; |
391 | spin_unlock_irqrestore(lock: &pipe->lock, flags); |
392 | |
393 | if (start) |
394 | omap4iss_pipeline_set_stream(pipe, |
395 | state: ISS_PIPELINE_STREAM_SINGLESHOT); |
396 | } |
397 | } |
398 | |
399 | static const struct vb2_ops iss_video_vb2ops = { |
400 | .queue_setup = iss_video_queue_setup, |
401 | .buf_prepare = iss_video_buf_prepare, |
402 | .buf_queue = iss_video_buf_queue, |
403 | .buf_cleanup = iss_video_buf_cleanup, |
404 | }; |
405 | |
406 | /* |
407 | * omap4iss_video_buffer_next - Complete the current buffer and return the next |
408 | * @video: ISS video object |
409 | * |
410 | * Remove the current video buffer from the DMA queue and fill its timestamp, |
411 | * field count and state fields before waking up its completion handler. |
412 | * |
413 | * For capture video nodes, the buffer state is set to VB2_BUF_STATE_DONE if no |
414 | * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise. |
415 | * |
416 | * The DMA queue is expected to contain at least one buffer. |
417 | * |
418 | * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is |
419 | * empty. |
420 | */ |
421 | struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video) |
422 | { |
423 | struct iss_pipeline *pipe = to_iss_pipeline(entity: &video->video.entity); |
424 | enum iss_pipeline_state state; |
425 | struct iss_buffer *buf; |
426 | unsigned long flags; |
427 | |
428 | spin_lock_irqsave(&video->qlock, flags); |
429 | if (WARN_ON(list_empty(&video->dmaqueue))) { |
430 | spin_unlock_irqrestore(lock: &video->qlock, flags); |
431 | return NULL; |
432 | } |
433 | |
434 | buf = list_first_entry(&video->dmaqueue, struct iss_buffer, |
435 | list); |
436 | list_del(entry: &buf->list); |
437 | spin_unlock_irqrestore(lock: &video->qlock, flags); |
438 | |
439 | buf->vb.vb2_buf.timestamp = ktime_get_ns(); |
440 | |
441 | /* |
442 | * Do frame number propagation only if this is the output video node. |
443 | * Frame number either comes from the CSI receivers or it gets |
444 | * incremented here if H3A is not active. |
445 | * Note: There is no guarantee that the output buffer will finish |
446 | * first, so the input number might lag behind by 1 in some cases. |
447 | */ |
448 | if (video == pipe->output && !pipe->do_propagation) |
449 | buf->vb.sequence = |
450 | atomic_inc_return(v: &pipe->frame_number); |
451 | else |
452 | buf->vb.sequence = atomic_read(v: &pipe->frame_number); |
453 | |
454 | vb2_buffer_done(vb: &buf->vb.vb2_buf, state: pipe->error ? |
455 | VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); |
456 | pipe->error = false; |
457 | |
458 | spin_lock_irqsave(&video->qlock, flags); |
459 | if (list_empty(head: &video->dmaqueue)) { |
460 | spin_unlock_irqrestore(lock: &video->qlock, flags); |
461 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
462 | state = ISS_PIPELINE_QUEUE_OUTPUT |
463 | | ISS_PIPELINE_STREAM; |
464 | else |
465 | state = ISS_PIPELINE_QUEUE_INPUT |
466 | | ISS_PIPELINE_STREAM; |
467 | |
468 | spin_lock_irqsave(&pipe->lock, flags); |
469 | pipe->state &= ~state; |
470 | if (video->pipe.stream_state == ISS_PIPELINE_STREAM_CONTINUOUS) |
471 | video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN; |
472 | spin_unlock_irqrestore(lock: &pipe->lock, flags); |
473 | return NULL; |
474 | } |
475 | |
476 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input) { |
477 | spin_lock(lock: &pipe->lock); |
478 | pipe->state &= ~ISS_PIPELINE_STREAM; |
479 | spin_unlock(lock: &pipe->lock); |
480 | } |
481 | |
482 | buf = list_first_entry(&video->dmaqueue, struct iss_buffer, |
483 | list); |
484 | spin_unlock_irqrestore(lock: &video->qlock, flags); |
485 | buf->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE; |
486 | return buf; |
487 | } |
488 | |
489 | /* |
490 | * omap4iss_video_cancel_stream - Cancel stream on a video node |
491 | * @video: ISS video object |
492 | * |
493 | * Cancelling a stream mark all buffers on the video node as erroneous and makes |
494 | * sure no new buffer can be queued. |
495 | */ |
496 | void omap4iss_video_cancel_stream(struct iss_video *video) |
497 | { |
498 | unsigned long flags; |
499 | |
500 | spin_lock_irqsave(&video->qlock, flags); |
501 | |
502 | while (!list_empty(head: &video->dmaqueue)) { |
503 | struct iss_buffer *buf; |
504 | |
505 | buf = list_first_entry(&video->dmaqueue, struct iss_buffer, |
506 | list); |
507 | list_del(entry: &buf->list); |
508 | vb2_buffer_done(vb: &buf->vb.vb2_buf, state: VB2_BUF_STATE_ERROR); |
509 | } |
510 | |
511 | vb2_queue_error(q: video->queue); |
512 | video->error = true; |
513 | |
514 | spin_unlock_irqrestore(lock: &video->qlock, flags); |
515 | } |
516 | |
517 | /* ----------------------------------------------------------------------------- |
518 | * V4L2 ioctls |
519 | */ |
520 | |
521 | static int |
522 | iss_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) |
523 | { |
524 | struct iss_video *video = video_drvdata(file); |
525 | |
526 | strscpy(cap->driver, ISS_VIDEO_DRIVER_NAME, sizeof(cap->driver)); |
527 | strscpy(cap->card, video->video.name, sizeof(cap->card)); |
528 | strscpy(cap->bus_info, "media" , sizeof(cap->bus_info)); |
529 | cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING |
530 | | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT; |
531 | |
532 | return 0; |
533 | } |
534 | |
535 | static int |
536 | iss_video_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f) |
537 | { |
538 | struct iss_video *video = video_drvdata(file); |
539 | struct v4l2_mbus_framefmt format; |
540 | unsigned int index = f->index; |
541 | unsigned int i; |
542 | int ret; |
543 | |
544 | if (f->type != video->type) |
545 | return -EINVAL; |
546 | |
547 | ret = __iss_video_get_format(video, format: &format); |
548 | if (ret < 0) |
549 | return ret; |
550 | |
551 | for (i = 0; i < ARRAY_SIZE(formats); ++i) { |
552 | const struct iss_format_info *info = &formats[i]; |
553 | |
554 | if (format.code != info->code) |
555 | continue; |
556 | |
557 | if (index == 0) { |
558 | f->pixelformat = info->pixelformat; |
559 | return 0; |
560 | } |
561 | |
562 | index--; |
563 | } |
564 | |
565 | return -EINVAL; |
566 | } |
567 | |
568 | static int |
569 | iss_video_get_format(struct file *file, void *fh, struct v4l2_format *format) |
570 | { |
571 | struct iss_video_fh *vfh = to_iss_video_fh(fh); |
572 | struct iss_video *video = video_drvdata(file); |
573 | |
574 | if (format->type != video->type) |
575 | return -EINVAL; |
576 | |
577 | mutex_lock(&video->mutex); |
578 | *format = vfh->format; |
579 | mutex_unlock(lock: &video->mutex); |
580 | |
581 | return 0; |
582 | } |
583 | |
584 | static int |
585 | iss_video_set_format(struct file *file, void *fh, struct v4l2_format *format) |
586 | { |
587 | struct iss_video_fh *vfh = to_iss_video_fh(fh); |
588 | struct iss_video *video = video_drvdata(file); |
589 | struct v4l2_mbus_framefmt fmt; |
590 | |
591 | if (format->type != video->type) |
592 | return -EINVAL; |
593 | |
594 | mutex_lock(&video->mutex); |
595 | |
596 | /* |
597 | * Fill the bytesperline and sizeimage fields by converting to media bus |
598 | * format and back to pixel format. |
599 | */ |
600 | iss_video_pix_to_mbus(pix: &format->fmt.pix, mbus: &fmt); |
601 | iss_video_mbus_to_pix(video, mbus: &fmt, pix: &format->fmt.pix); |
602 | |
603 | vfh->format = *format; |
604 | |
605 | mutex_unlock(lock: &video->mutex); |
606 | return 0; |
607 | } |
608 | |
609 | static int |
610 | iss_video_try_format(struct file *file, void *fh, struct v4l2_format *format) |
611 | { |
612 | struct iss_video *video = video_drvdata(file); |
613 | struct v4l2_subdev_format fmt = { |
614 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
615 | }; |
616 | struct v4l2_subdev *subdev; |
617 | u32 pad; |
618 | int ret; |
619 | |
620 | if (format->type != video->type) |
621 | return -EINVAL; |
622 | |
623 | subdev = iss_video_remote_subdev(video, pad: &pad); |
624 | if (!subdev) |
625 | return -EINVAL; |
626 | |
627 | iss_video_pix_to_mbus(pix: &format->fmt.pix, mbus: &fmt.format); |
628 | |
629 | fmt.pad = pad; |
630 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); |
631 | if (ret) |
632 | return ret; |
633 | |
634 | iss_video_mbus_to_pix(video, mbus: &fmt.format, pix: &format->fmt.pix); |
635 | return 0; |
636 | } |
637 | |
638 | static int |
639 | iss_video_get_selection(struct file *file, void *fh, struct v4l2_selection *sel) |
640 | { |
641 | struct iss_video *video = video_drvdata(file); |
642 | struct v4l2_subdev_format format = { |
643 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
644 | }; |
645 | struct v4l2_subdev *subdev; |
646 | struct v4l2_subdev_selection sdsel = { |
647 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
648 | .target = sel->target, |
649 | }; |
650 | u32 pad; |
651 | int ret; |
652 | |
653 | switch (sel->target) { |
654 | case V4L2_SEL_TGT_CROP: |
655 | case V4L2_SEL_TGT_CROP_BOUNDS: |
656 | case V4L2_SEL_TGT_CROP_DEFAULT: |
657 | if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) |
658 | return -EINVAL; |
659 | break; |
660 | case V4L2_SEL_TGT_COMPOSE: |
661 | case V4L2_SEL_TGT_COMPOSE_BOUNDS: |
662 | case V4L2_SEL_TGT_COMPOSE_DEFAULT: |
663 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
664 | return -EINVAL; |
665 | break; |
666 | default: |
667 | return -EINVAL; |
668 | } |
669 | subdev = iss_video_remote_subdev(video, pad: &pad); |
670 | if (!subdev) |
671 | return -EINVAL; |
672 | |
673 | /* |
674 | * Try the get selection operation first and fallback to get format if |
675 | * not implemented. |
676 | */ |
677 | sdsel.pad = pad; |
678 | ret = v4l2_subdev_call(subdev, pad, get_selection, NULL, &sdsel); |
679 | if (!ret) |
680 | sel->r = sdsel.r; |
681 | if (ret != -ENOIOCTLCMD) |
682 | return ret; |
683 | |
684 | format.pad = pad; |
685 | ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format); |
686 | if (ret < 0) |
687 | return ret == -ENOIOCTLCMD ? -ENOTTY : ret; |
688 | |
689 | sel->r.left = 0; |
690 | sel->r.top = 0; |
691 | sel->r.width = format.format.width; |
692 | sel->r.height = format.format.height; |
693 | |
694 | return 0; |
695 | } |
696 | |
697 | static int |
698 | iss_video_set_selection(struct file *file, void *fh, struct v4l2_selection *sel) |
699 | { |
700 | struct iss_video *video = video_drvdata(file); |
701 | struct v4l2_subdev *subdev; |
702 | struct v4l2_subdev_selection sdsel = { |
703 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
704 | .target = sel->target, |
705 | .flags = sel->flags, |
706 | .r = sel->r, |
707 | }; |
708 | u32 pad; |
709 | int ret; |
710 | |
711 | switch (sel->target) { |
712 | case V4L2_SEL_TGT_CROP: |
713 | if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) |
714 | return -EINVAL; |
715 | break; |
716 | case V4L2_SEL_TGT_COMPOSE: |
717 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
718 | return -EINVAL; |
719 | break; |
720 | default: |
721 | return -EINVAL; |
722 | } |
723 | subdev = iss_video_remote_subdev(video, pad: &pad); |
724 | if (!subdev) |
725 | return -EINVAL; |
726 | |
727 | sdsel.pad = pad; |
728 | mutex_lock(&video->mutex); |
729 | ret = v4l2_subdev_call(subdev, pad, set_selection, NULL, &sdsel); |
730 | mutex_unlock(lock: &video->mutex); |
731 | if (!ret) |
732 | sel->r = sdsel.r; |
733 | |
734 | return ret == -ENOIOCTLCMD ? -ENOTTY : ret; |
735 | } |
736 | |
737 | static int |
738 | iss_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a) |
739 | { |
740 | struct iss_video_fh *vfh = to_iss_video_fh(fh); |
741 | struct iss_video *video = video_drvdata(file); |
742 | |
743 | if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || |
744 | video->type != a->type) |
745 | return -EINVAL; |
746 | |
747 | memset(a, 0, sizeof(*a)); |
748 | a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; |
749 | a->parm.output.capability = V4L2_CAP_TIMEPERFRAME; |
750 | a->parm.output.timeperframe = vfh->timeperframe; |
751 | |
752 | return 0; |
753 | } |
754 | |
755 | static int |
756 | iss_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a) |
757 | { |
758 | struct iss_video_fh *vfh = to_iss_video_fh(fh); |
759 | struct iss_video *video = video_drvdata(file); |
760 | |
761 | if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || |
762 | video->type != a->type) |
763 | return -EINVAL; |
764 | |
765 | if (a->parm.output.timeperframe.denominator == 0) |
766 | a->parm.output.timeperframe.denominator = 1; |
767 | |
768 | vfh->timeperframe = a->parm.output.timeperframe; |
769 | |
770 | return 0; |
771 | } |
772 | |
773 | static int |
774 | iss_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb) |
775 | { |
776 | struct iss_video_fh *vfh = to_iss_video_fh(fh); |
777 | |
778 | return vb2_reqbufs(q: &vfh->queue, req: rb); |
779 | } |
780 | |
781 | static int |
782 | iss_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) |
783 | { |
784 | struct iss_video_fh *vfh = to_iss_video_fh(fh); |
785 | |
786 | return vb2_querybuf(q: &vfh->queue, b); |
787 | } |
788 | |
789 | static int |
790 | iss_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) |
791 | { |
792 | struct iss_video *video = video_drvdata(file); |
793 | struct iss_video_fh *vfh = to_iss_video_fh(fh); |
794 | |
795 | return vb2_qbuf(q: &vfh->queue, mdev: video->video.v4l2_dev->mdev, b); |
796 | } |
797 | |
798 | static int |
799 | iss_video_expbuf(struct file *file, void *fh, struct v4l2_exportbuffer *e) |
800 | { |
801 | struct iss_video_fh *vfh = to_iss_video_fh(fh); |
802 | |
803 | return vb2_expbuf(q: &vfh->queue, eb: e); |
804 | } |
805 | |
806 | static int |
807 | iss_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) |
808 | { |
809 | struct iss_video_fh *vfh = to_iss_video_fh(fh); |
810 | |
811 | return vb2_dqbuf(q: &vfh->queue, b, nonblocking: file->f_flags & O_NONBLOCK); |
812 | } |
813 | |
814 | /* |
815 | * Stream management |
816 | * |
817 | * Every ISS pipeline has a single input and a single output. The input can be |
818 | * either a sensor or a video node. The output is always a video node. |
819 | * |
820 | * As every pipeline has an output video node, the ISS video objects at the |
821 | * pipeline output stores the pipeline state. It tracks the streaming state of |
822 | * both the input and output, as well as the availability of buffers. |
823 | * |
824 | * In sensor-to-memory mode, frames are always available at the pipeline input. |
825 | * Starting the sensor usually requires I2C transfers and must be done in |
826 | * interruptible context. The pipeline is started and stopped synchronously |
827 | * to the stream on/off commands. All modules in the pipeline will get their |
828 | * subdev set stream handler called. The module at the end of the pipeline must |
829 | * delay starting the hardware until buffers are available at its output. |
830 | * |
831 | * In memory-to-memory mode, starting/stopping the stream requires |
832 | * synchronization between the input and output. ISS modules can't be stopped |
833 | * in the middle of a frame, and at least some of the modules seem to become |
834 | * busy as soon as they're started, even if they don't receive a frame start |
835 | * event. For that reason frames need to be processed in single-shot mode. The |
836 | * driver needs to wait until a frame is completely processed and written to |
837 | * memory before restarting the pipeline for the next frame. Pipelined |
838 | * processing might be possible but requires more testing. |
839 | * |
840 | * Stream start must be delayed until buffers are available at both the input |
841 | * and output. The pipeline must be started in the vb2 queue callback with |
842 | * the buffers queue spinlock held. The modules subdev set stream operation must |
843 | * not sleep. |
844 | */ |
845 | static int |
846 | iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) |
847 | { |
848 | struct iss_video_fh *vfh = to_iss_video_fh(fh); |
849 | struct iss_video *video = video_drvdata(file); |
850 | struct media_device *mdev = video->video.entity.graph_obj.mdev; |
851 | struct media_pipeline_pad_iter iter; |
852 | enum iss_pipeline_state state; |
853 | struct iss_pipeline *pipe; |
854 | struct iss_video *far_end; |
855 | struct media_pad *pad; |
856 | unsigned long flags; |
857 | int ret; |
858 | |
859 | if (type != video->type) |
860 | return -EINVAL; |
861 | |
862 | mutex_lock(&video->stream_lock); |
863 | |
864 | /* |
865 | * Start streaming on the pipeline. No link touching an entity in the |
866 | * pipeline can be activated or deactivated once streaming is started. |
867 | */ |
868 | pipe = to_iss_pipeline(entity: &video->video.entity) ? : &video->pipe; |
869 | pipe->external = NULL; |
870 | pipe->external_rate = 0; |
871 | pipe->external_bpp = 0; |
872 | |
873 | ret = media_entity_enum_init(ent_enum: &pipe->ent_enum, mdev); |
874 | if (ret) |
875 | goto err_entity_enum_init; |
876 | |
877 | if (video->iss->pdata->set_constraints) |
878 | video->iss->pdata->set_constraints(video->iss, true); |
879 | |
880 | ret = video_device_pipeline_start(vdev: &video->video, pipe: &pipe->pipe); |
881 | if (ret < 0) |
882 | goto err_media_pipeline_start; |
883 | |
884 | media_pipeline_for_each_pad(&pipe->pipe, &iter, pad) |
885 | media_entity_enum_set(ent_enum: &pipe->ent_enum, entity: pad->entity); |
886 | |
887 | /* |
888 | * Verify that the currently configured format matches the output of |
889 | * the connected subdev. |
890 | */ |
891 | ret = iss_video_check_format(video, vfh); |
892 | if (ret < 0) |
893 | goto err_iss_video_check_format; |
894 | |
895 | video->bpl_padding = ret; |
896 | video->bpl_value = vfh->format.fmt.pix.bytesperline; |
897 | |
898 | /* |
899 | * Find the ISS video node connected at the far end of the pipeline and |
900 | * update the pipeline. |
901 | */ |
902 | far_end = iss_video_far_end(video, pipe); |
903 | if (IS_ERR(ptr: far_end)) { |
904 | ret = PTR_ERR(ptr: far_end); |
905 | goto err_iss_video_check_format; |
906 | } |
907 | |
908 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
909 | state = ISS_PIPELINE_STREAM_OUTPUT | ISS_PIPELINE_IDLE_OUTPUT; |
910 | pipe->input = far_end; |
911 | pipe->output = video; |
912 | } else { |
913 | if (!far_end) { |
914 | ret = -EPIPE; |
915 | goto err_iss_video_check_format; |
916 | } |
917 | |
918 | state = ISS_PIPELINE_STREAM_INPUT | ISS_PIPELINE_IDLE_INPUT; |
919 | pipe->input = video; |
920 | pipe->output = far_end; |
921 | } |
922 | |
923 | spin_lock_irqsave(&pipe->lock, flags); |
924 | pipe->state &= ~ISS_PIPELINE_STREAM; |
925 | pipe->state |= state; |
926 | spin_unlock_irqrestore(lock: &pipe->lock, flags); |
927 | |
928 | /* |
929 | * Set the maximum time per frame as the value requested by userspace. |
930 | * This is a soft limit that can be overridden if the hardware doesn't |
931 | * support the request limit. |
932 | */ |
933 | if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) |
934 | pipe->max_timeperframe = vfh->timeperframe; |
935 | |
936 | video->queue = &vfh->queue; |
937 | INIT_LIST_HEAD(list: &video->dmaqueue); |
938 | video->error = false; |
939 | atomic_set(v: &pipe->frame_number, i: -1); |
940 | |
941 | ret = vb2_streamon(q: &vfh->queue, type); |
942 | if (ret < 0) |
943 | goto err_iss_video_check_format; |
944 | |
945 | /* |
946 | * In sensor-to-memory mode, the stream can be started synchronously |
947 | * to the stream on command. In memory-to-memory mode, it will be |
948 | * started when buffers are queued on both the input and output. |
949 | */ |
950 | if (!pipe->input) { |
951 | unsigned long flags; |
952 | |
953 | ret = omap4iss_pipeline_set_stream(pipe, |
954 | state: ISS_PIPELINE_STREAM_CONTINUOUS); |
955 | if (ret < 0) |
956 | goto err_omap4iss_set_stream; |
957 | spin_lock_irqsave(&video->qlock, flags); |
958 | if (list_empty(head: &video->dmaqueue)) |
959 | video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN; |
960 | spin_unlock_irqrestore(lock: &video->qlock, flags); |
961 | } |
962 | |
963 | mutex_unlock(lock: &video->stream_lock); |
964 | |
965 | return 0; |
966 | |
967 | err_omap4iss_set_stream: |
968 | vb2_streamoff(q: &vfh->queue, type); |
969 | err_iss_video_check_format: |
970 | video_device_pipeline_stop(vdev: &video->video); |
971 | err_media_pipeline_start: |
972 | if (video->iss->pdata->set_constraints) |
973 | video->iss->pdata->set_constraints(video->iss, false); |
974 | video->queue = NULL; |
975 | |
976 | err_entity_enum_init: |
977 | media_entity_enum_cleanup(ent_enum: &pipe->ent_enum); |
978 | |
979 | mutex_unlock(lock: &video->stream_lock); |
980 | |
981 | return ret; |
982 | } |
983 | |
984 | static int |
985 | iss_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) |
986 | { |
987 | struct iss_video_fh *vfh = to_iss_video_fh(fh); |
988 | struct iss_video *video = video_drvdata(file); |
989 | struct iss_pipeline *pipe = to_iss_pipeline(entity: &video->video.entity); |
990 | enum iss_pipeline_state state; |
991 | unsigned long flags; |
992 | |
993 | if (type != video->type) |
994 | return -EINVAL; |
995 | |
996 | mutex_lock(&video->stream_lock); |
997 | |
998 | if (!vb2_is_streaming(q: &vfh->queue)) |
999 | goto done; |
1000 | |
1001 | /* Update the pipeline state. */ |
1002 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1003 | state = ISS_PIPELINE_STREAM_OUTPUT |
1004 | | ISS_PIPELINE_QUEUE_OUTPUT; |
1005 | else |
1006 | state = ISS_PIPELINE_STREAM_INPUT |
1007 | | ISS_PIPELINE_QUEUE_INPUT; |
1008 | |
1009 | spin_lock_irqsave(&pipe->lock, flags); |
1010 | pipe->state &= ~state; |
1011 | spin_unlock_irqrestore(lock: &pipe->lock, flags); |
1012 | |
1013 | /* Stop the stream. */ |
1014 | omap4iss_pipeline_set_stream(pipe, state: ISS_PIPELINE_STREAM_STOPPED); |
1015 | vb2_streamoff(q: &vfh->queue, type); |
1016 | video->queue = NULL; |
1017 | |
1018 | media_entity_enum_cleanup(ent_enum: &pipe->ent_enum); |
1019 | |
1020 | if (video->iss->pdata->set_constraints) |
1021 | video->iss->pdata->set_constraints(video->iss, false); |
1022 | video_device_pipeline_stop(vdev: &video->video); |
1023 | |
1024 | done: |
1025 | mutex_unlock(lock: &video->stream_lock); |
1026 | return 0; |
1027 | } |
1028 | |
1029 | static int |
1030 | iss_video_enum_input(struct file *file, void *fh, struct v4l2_input *input) |
1031 | { |
1032 | if (input->index > 0) |
1033 | return -EINVAL; |
1034 | |
1035 | strscpy(input->name, "camera" , sizeof(input->name)); |
1036 | input->type = V4L2_INPUT_TYPE_CAMERA; |
1037 | |
1038 | return 0; |
1039 | } |
1040 | |
1041 | static int |
1042 | iss_video_g_input(struct file *file, void *fh, unsigned int *input) |
1043 | { |
1044 | *input = 0; |
1045 | |
1046 | return 0; |
1047 | } |
1048 | |
1049 | static int |
1050 | iss_video_s_input(struct file *file, void *fh, unsigned int input) |
1051 | { |
1052 | return input == 0 ? 0 : -EINVAL; |
1053 | } |
1054 | |
1055 | static const struct v4l2_ioctl_ops iss_video_ioctl_ops = { |
1056 | .vidioc_querycap = iss_video_querycap, |
1057 | .vidioc_enum_fmt_vid_cap = iss_video_enum_format, |
1058 | .vidioc_g_fmt_vid_cap = iss_video_get_format, |
1059 | .vidioc_s_fmt_vid_cap = iss_video_set_format, |
1060 | .vidioc_try_fmt_vid_cap = iss_video_try_format, |
1061 | .vidioc_g_fmt_vid_out = iss_video_get_format, |
1062 | .vidioc_s_fmt_vid_out = iss_video_set_format, |
1063 | .vidioc_try_fmt_vid_out = iss_video_try_format, |
1064 | .vidioc_g_selection = iss_video_get_selection, |
1065 | .vidioc_s_selection = iss_video_set_selection, |
1066 | .vidioc_g_parm = iss_video_get_param, |
1067 | .vidioc_s_parm = iss_video_set_param, |
1068 | .vidioc_reqbufs = iss_video_reqbufs, |
1069 | .vidioc_querybuf = iss_video_querybuf, |
1070 | .vidioc_qbuf = iss_video_qbuf, |
1071 | .vidioc_expbuf = iss_video_expbuf, |
1072 | .vidioc_dqbuf = iss_video_dqbuf, |
1073 | .vidioc_streamon = iss_video_streamon, |
1074 | .vidioc_streamoff = iss_video_streamoff, |
1075 | .vidioc_enum_input = iss_video_enum_input, |
1076 | .vidioc_g_input = iss_video_g_input, |
1077 | .vidioc_s_input = iss_video_s_input, |
1078 | }; |
1079 | |
1080 | /* ----------------------------------------------------------------------------- |
1081 | * V4L2 file operations |
1082 | */ |
1083 | |
1084 | static int iss_video_open(struct file *file) |
1085 | { |
1086 | struct iss_video *video = video_drvdata(file); |
1087 | struct iss_video_fh *handle; |
1088 | struct vb2_queue *q; |
1089 | int ret = 0; |
1090 | |
1091 | handle = kzalloc(size: sizeof(*handle), GFP_KERNEL); |
1092 | if (!handle) |
1093 | return -ENOMEM; |
1094 | |
1095 | v4l2_fh_init(fh: &handle->vfh, vdev: &video->video); |
1096 | v4l2_fh_add(fh: &handle->vfh); |
1097 | |
1098 | /* If this is the first user, initialise the pipeline. */ |
1099 | if (!omap4iss_get(iss: video->iss)) { |
1100 | ret = -EBUSY; |
1101 | goto done; |
1102 | } |
1103 | |
1104 | ret = v4l2_pipeline_pm_get(entity: &video->video.entity); |
1105 | if (ret < 0) { |
1106 | omap4iss_put(iss: video->iss); |
1107 | goto done; |
1108 | } |
1109 | |
1110 | q = &handle->queue; |
1111 | |
1112 | q->type = video->type; |
1113 | q->io_modes = VB2_MMAP | VB2_DMABUF; |
1114 | q->drv_priv = handle; |
1115 | q->ops = &iss_video_vb2ops; |
1116 | q->mem_ops = &vb2_dma_contig_memops; |
1117 | q->buf_struct_size = sizeof(struct iss_buffer); |
1118 | q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
1119 | q->dev = video->iss->dev; |
1120 | |
1121 | ret = vb2_queue_init(q); |
1122 | if (ret) { |
1123 | omap4iss_put(iss: video->iss); |
1124 | goto done; |
1125 | } |
1126 | |
1127 | memset(&handle->format, 0, sizeof(handle->format)); |
1128 | handle->format.type = video->type; |
1129 | handle->timeperframe.denominator = 1; |
1130 | |
1131 | handle->video = video; |
1132 | file->private_data = &handle->vfh; |
1133 | |
1134 | done: |
1135 | if (ret < 0) { |
1136 | v4l2_fh_del(fh: &handle->vfh); |
1137 | v4l2_fh_exit(fh: &handle->vfh); |
1138 | kfree(objp: handle); |
1139 | } |
1140 | |
1141 | return ret; |
1142 | } |
1143 | |
1144 | static int iss_video_release(struct file *file) |
1145 | { |
1146 | struct iss_video *video = video_drvdata(file); |
1147 | struct v4l2_fh *vfh = file->private_data; |
1148 | struct iss_video_fh *handle = to_iss_video_fh(vfh); |
1149 | |
1150 | /* Disable streaming and free the buffers queue resources. */ |
1151 | iss_video_streamoff(file, fh: vfh, type: video->type); |
1152 | |
1153 | v4l2_pipeline_pm_put(entity: &video->video.entity); |
1154 | |
1155 | /* Release the videobuf2 queue */ |
1156 | vb2_queue_release(q: &handle->queue); |
1157 | |
1158 | v4l2_fh_del(fh: vfh); |
1159 | v4l2_fh_exit(fh: vfh); |
1160 | kfree(objp: handle); |
1161 | file->private_data = NULL; |
1162 | |
1163 | omap4iss_put(iss: video->iss); |
1164 | |
1165 | return 0; |
1166 | } |
1167 | |
1168 | static __poll_t iss_video_poll(struct file *file, poll_table *wait) |
1169 | { |
1170 | struct iss_video_fh *vfh = to_iss_video_fh(file->private_data); |
1171 | |
1172 | return vb2_poll(q: &vfh->queue, file, wait); |
1173 | } |
1174 | |
1175 | static int iss_video_mmap(struct file *file, struct vm_area_struct *vma) |
1176 | { |
1177 | struct iss_video_fh *vfh = to_iss_video_fh(file->private_data); |
1178 | |
1179 | return vb2_mmap(q: &vfh->queue, vma); |
1180 | } |
1181 | |
1182 | static const struct v4l2_file_operations iss_video_fops = { |
1183 | .owner = THIS_MODULE, |
1184 | .unlocked_ioctl = video_ioctl2, |
1185 | .open = iss_video_open, |
1186 | .release = iss_video_release, |
1187 | .poll = iss_video_poll, |
1188 | .mmap = iss_video_mmap, |
1189 | }; |
1190 | |
1191 | /* ----------------------------------------------------------------------------- |
1192 | * ISS video core |
1193 | */ |
1194 | |
1195 | static const struct iss_video_operations iss_video_dummy_ops = { |
1196 | }; |
1197 | |
1198 | int omap4iss_video_init(struct iss_video *video, const char *name) |
1199 | { |
1200 | const char *direction; |
1201 | int ret; |
1202 | |
1203 | switch (video->type) { |
1204 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: |
1205 | direction = "output" ; |
1206 | video->pad.flags = MEDIA_PAD_FL_SINK; |
1207 | break; |
1208 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
1209 | direction = "input" ; |
1210 | video->pad.flags = MEDIA_PAD_FL_SOURCE; |
1211 | break; |
1212 | |
1213 | default: |
1214 | return -EINVAL; |
1215 | } |
1216 | |
1217 | ret = media_entity_pads_init(entity: &video->video.entity, num_pads: 1, pads: &video->pad); |
1218 | if (ret < 0) |
1219 | return ret; |
1220 | |
1221 | spin_lock_init(&video->qlock); |
1222 | mutex_init(&video->mutex); |
1223 | atomic_set(v: &video->active, i: 0); |
1224 | |
1225 | spin_lock_init(&video->pipe.lock); |
1226 | mutex_init(&video->stream_lock); |
1227 | |
1228 | /* Initialize the video device. */ |
1229 | if (!video->ops) |
1230 | video->ops = &iss_video_dummy_ops; |
1231 | |
1232 | video->video.fops = &iss_video_fops; |
1233 | snprintf(buf: video->video.name, size: sizeof(video->video.name), |
1234 | fmt: "OMAP4 ISS %s %s" , name, direction); |
1235 | video->video.vfl_type = VFL_TYPE_VIDEO; |
1236 | video->video.release = video_device_release_empty; |
1237 | video->video.ioctl_ops = &iss_video_ioctl_ops; |
1238 | video->pipe.stream_state = ISS_PIPELINE_STREAM_STOPPED; |
1239 | |
1240 | video_set_drvdata(vdev: &video->video, data: video); |
1241 | |
1242 | return 0; |
1243 | } |
1244 | |
1245 | void omap4iss_video_cleanup(struct iss_video *video) |
1246 | { |
1247 | media_entity_cleanup(entity: &video->video.entity); |
1248 | mutex_destroy(lock: &video->stream_lock); |
1249 | mutex_destroy(lock: &video->mutex); |
1250 | } |
1251 | |
1252 | int omap4iss_video_register(struct iss_video *video, struct v4l2_device *vdev) |
1253 | { |
1254 | int ret; |
1255 | |
1256 | video->video.v4l2_dev = vdev; |
1257 | if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1258 | video->video.device_caps = V4L2_CAP_VIDEO_CAPTURE; |
1259 | else |
1260 | video->video.device_caps = V4L2_CAP_VIDEO_OUTPUT; |
1261 | video->video.device_caps |= V4L2_CAP_STREAMING; |
1262 | |
1263 | ret = video_register_device(vdev: &video->video, type: VFL_TYPE_VIDEO, nr: -1); |
1264 | if (ret < 0) |
1265 | dev_err(video->iss->dev, |
1266 | "could not register video device (%d)\n" , ret); |
1267 | |
1268 | return ret; |
1269 | } |
1270 | |
1271 | void omap4iss_video_unregister(struct iss_video *video) |
1272 | { |
1273 | video_unregister_device(vdev: &video->video); |
1274 | } |
1275 | |