2 * TI OMAP4 ISS V4L2 Driver - Generic video node
4 * Copyright (C) 2012 Texas Instruments, Inc.
6 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
14 #include <asm/cacheflush.h>
15 #include <linux/clk.h>
17 #include <linux/pagemap.h>
18 #include <linux/sched.h>
19 #include <linux/slab.h>
20 #include <linux/vmalloc.h>
21 #include <linux/module.h>
22 #include <media/v4l2-dev.h>
23 #include <media/v4l2-ioctl.h>
25 #include "iss_video.h"
29 /* -----------------------------------------------------------------------------
33 static struct iss_format_info formats[] = {
34 { V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8,
35 V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8,
36 V4L2_PIX_FMT_GREY, 8, "Greyscale 8 bpp", },
37 { V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y10_1X10,
38 V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y8_1X8,
39 V4L2_PIX_FMT_Y10, 10, "Greyscale 10 bpp", },
40 { V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y10_1X10,
41 V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y8_1X8,
42 V4L2_PIX_FMT_Y12, 12, "Greyscale 12 bpp", },
43 { V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8,
44 V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8,
45 V4L2_PIX_FMT_SBGGR8, 8, "BGGR Bayer 8 bpp", },
46 { V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8,
47 V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8,
48 V4L2_PIX_FMT_SGBRG8, 8, "GBRG Bayer 8 bpp", },
49 { V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8,
50 V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8,
51 V4L2_PIX_FMT_SGRBG8, 8, "GRBG Bayer 8 bpp", },
52 { V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8,
53 V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8,
54 V4L2_PIX_FMT_SRGGB8, 8, "RGGB Bayer 8 bpp", },
55 { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
56 V4L2_MBUS_FMT_SGRBG10_1X10, 0,
57 V4L2_PIX_FMT_SGRBG10DPCM8, 8, "GRBG Bayer 10 bpp DPCM8", },
58 { V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR10_1X10,
59 V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR8_1X8,
60 V4L2_PIX_FMT_SBGGR10, 10, "BGGR Bayer 10 bpp", },
61 { V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG10_1X10,
62 V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG8_1X8,
63 V4L2_PIX_FMT_SGBRG10, 10, "GBRG Bayer 10 bpp", },
64 { V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG10_1X10,
65 V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG8_1X8,
66 V4L2_PIX_FMT_SGRBG10, 10, "GRBG Bayer 10 bpp", },
67 { V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB10_1X10,
68 V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB8_1X8,
69 V4L2_PIX_FMT_SRGGB10, 10, "RGGB Bayer 10 bpp", },
70 { V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR10_1X10,
71 V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR8_1X8,
72 V4L2_PIX_FMT_SBGGR12, 12, "BGGR Bayer 12 bpp", },
73 { V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG10_1X10,
74 V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG8_1X8,
75 V4L2_PIX_FMT_SGBRG12, 12, "GBRG Bayer 12 bpp", },
76 { V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG10_1X10,
77 V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG8_1X8,
78 V4L2_PIX_FMT_SGRBG12, 12, "GRBG Bayer 12 bpp", },
79 { V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB10_1X10,
80 V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB8_1X8,
81 V4L2_PIX_FMT_SRGGB12, 12, "RGGB Bayer 12 bpp", },
82 { V4L2_MBUS_FMT_UYVY8_1X16, V4L2_MBUS_FMT_UYVY8_1X16,
83 V4L2_MBUS_FMT_UYVY8_1X16, 0,
84 V4L2_PIX_FMT_UYVY, 16, "YUV 4:2:2 (UYVY)", },
85 { V4L2_MBUS_FMT_YUYV8_1X16, V4L2_MBUS_FMT_YUYV8_1X16,
86 V4L2_MBUS_FMT_YUYV8_1X16, 0,
87 V4L2_PIX_FMT_YUYV, 16, "YUV 4:2:2 (YUYV)", },
88 { V4L2_MBUS_FMT_YUYV8_1_5X8, V4L2_MBUS_FMT_YUYV8_1_5X8,
89 V4L2_MBUS_FMT_YUYV8_1_5X8, 0,
90 V4L2_PIX_FMT_NV12, 8, "YUV 4:2:0 (NV12)", },
93 const struct iss_format_info *
94 omap4iss_video_format_info(enum v4l2_mbus_pixelcode code)
98 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
99 if (formats[i].code == code)
107 * iss_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format
108 * @video: ISS video instance
109 * @mbus: v4l2_mbus_framefmt format (input)
110 * @pix: v4l2_pix_format format (output)
112 * Fill the output pix structure with information from the input mbus format.
113 * The bytesperline and sizeimage fields are computed from the requested bytes
114 * per line value in the pix format and information from the video instance.
116 * Return the number of padding bytes at end of line.
118 static unsigned int iss_video_mbus_to_pix(const struct iss_video *video,
119 const struct v4l2_mbus_framefmt *mbus,
120 struct v4l2_pix_format *pix)
122 unsigned int bpl = pix->bytesperline;
123 unsigned int min_bpl;
126 memset(pix, 0, sizeof(*pix));
127 pix->width = mbus->width;
128 pix->height = mbus->height;
130 /* Skip the last format in the loop so that it will be selected if no
133 for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) {
134 if (formats[i].code == mbus->code)
138 min_bpl = pix->width * ALIGN(formats[i].bpp, 8) / 8;
140 /* Clamp the requested bytes per line value. If the maximum bytes per
141 * line value is zero, the module doesn't support user configurable line
142 * sizes. Override the requested value with the minimum in that case.
145 bpl = clamp(bpl, min_bpl, video->bpl_max);
149 if (!video->bpl_zero_padding || bpl != min_bpl)
150 bpl = ALIGN(bpl, video->bpl_alignment);
152 pix->pixelformat = formats[i].pixelformat;
153 pix->bytesperline = bpl;
154 pix->sizeimage = pix->bytesperline * pix->height;
155 pix->colorspace = mbus->colorspace;
156 pix->field = mbus->field;
158 /* FIXME: Special case for NV12! We should make this nicer... */
159 if (pix->pixelformat == V4L2_PIX_FMT_NV12)
160 pix->sizeimage += (pix->bytesperline * pix->height) / 2;
162 return bpl - min_bpl;
165 static void iss_video_pix_to_mbus(const struct v4l2_pix_format *pix,
166 struct v4l2_mbus_framefmt *mbus)
170 memset(mbus, 0, sizeof(*mbus));
171 mbus->width = pix->width;
172 mbus->height = pix->height;
174 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
175 if (formats[i].pixelformat == pix->pixelformat)
179 if (WARN_ON(i == ARRAY_SIZE(formats)))
182 mbus->code = formats[i].code;
183 mbus->colorspace = pix->colorspace;
184 mbus->field = pix->field;
187 static struct v4l2_subdev *
188 iss_video_remote_subdev(struct iss_video *video, u32 *pad)
190 struct media_pad *remote;
192 remote = media_entity_remote_pad(&video->pad);
194 if (remote == NULL ||
195 media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
199 *pad = remote->index;
201 return media_entity_to_v4l2_subdev(remote->entity);
204 /* Return a pointer to the ISS video instance at the far end of the pipeline. */
205 static struct iss_video *
206 iss_video_far_end(struct iss_video *video)
208 struct media_entity_graph graph;
209 struct media_entity *entity = &video->video.entity;
210 struct media_device *mdev = entity->parent;
211 struct iss_video *far_end = NULL;
213 mutex_lock(&mdev->graph_mutex);
214 media_entity_graph_walk_start(&graph, entity);
216 while ((entity = media_entity_graph_walk_next(&graph))) {
217 if (entity == &video->video.entity)
220 if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
223 far_end = to_iss_video(media_entity_to_video_device(entity));
224 if (far_end->type != video->type)
230 mutex_unlock(&mdev->graph_mutex);
235 __iss_video_get_format(struct iss_video *video,
236 struct v4l2_mbus_framefmt *format)
238 struct v4l2_subdev_format fmt;
239 struct v4l2_subdev *subdev;
243 subdev = iss_video_remote_subdev(video, &pad);
247 memset(&fmt, 0, sizeof(fmt));
249 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
251 mutex_lock(&video->mutex);
252 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
253 mutex_unlock(&video->mutex);
258 *format = fmt.format;
263 iss_video_check_format(struct iss_video *video, struct iss_video_fh *vfh)
265 struct v4l2_mbus_framefmt format;
266 struct v4l2_pix_format pixfmt;
269 ret = __iss_video_get_format(video, &format);
273 pixfmt.bytesperline = 0;
274 ret = iss_video_mbus_to_pix(video, &format, &pixfmt);
276 if (vfh->format.fmt.pix.pixelformat != pixfmt.pixelformat ||
277 vfh->format.fmt.pix.height != pixfmt.height ||
278 vfh->format.fmt.pix.width != pixfmt.width ||
279 vfh->format.fmt.pix.bytesperline != pixfmt.bytesperline ||
280 vfh->format.fmt.pix.sizeimage != pixfmt.sizeimage)
286 /* -----------------------------------------------------------------------------
287 * Video queue operations
290 static int iss_video_queue_setup(struct vb2_queue *vq,
291 const struct v4l2_format *fmt,
292 unsigned int *count, unsigned int *num_planes,
293 unsigned int sizes[], void *alloc_ctxs[])
295 struct iss_video_fh *vfh = vb2_get_drv_priv(vq);
296 struct iss_video *video = vfh->video;
298 /* Revisit multi-planar support for NV12 */
301 sizes[0] = vfh->format.fmt.pix.sizeimage;
305 alloc_ctxs[0] = video->alloc_ctx;
307 *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0]));
312 static void iss_video_buf_cleanup(struct vb2_buffer *vb)
314 struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb);
316 if (buffer->iss_addr)
317 buffer->iss_addr = 0;
320 static int iss_video_buf_prepare(struct vb2_buffer *vb)
322 struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue);
323 struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb);
324 struct iss_video *video = vfh->video;
325 unsigned long size = vfh->format.fmt.pix.sizeimage;
328 if (vb2_plane_size(vb, 0) < size)
331 /* Refuse to prepare the buffer is the video node has registered an
332 * error. We don't need to take any lock here as the operation is
333 * inherently racy. The authoritative check will be performed in the
334 * queue handler, which can't return an error, this check is just a best
335 * effort to notify userspace as early as possible.
337 if (unlikely(video->error))
340 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
341 if (!IS_ALIGNED(addr, 32)) {
342 dev_dbg(video->iss->dev,
343 "Buffer address must be aligned to 32 bytes boundary.\n");
347 vb2_set_plane_payload(vb, 0, size);
348 buffer->iss_addr = addr;
352 static void iss_video_buf_queue(struct vb2_buffer *vb)
354 struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue);
355 struct iss_video *video = vfh->video;
356 struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb);
357 struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
361 spin_lock_irqsave(&video->qlock, flags);
363 if (unlikely(video->error)) {
364 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
365 spin_unlock_irqrestore(&video->qlock, flags);
369 empty = list_empty(&video->dmaqueue);
370 list_add_tail(&buffer->list, &video->dmaqueue);
372 spin_unlock_irqrestore(&video->qlock, flags);
375 enum iss_pipeline_state state;
378 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
379 state = ISS_PIPELINE_QUEUE_OUTPUT;
381 state = ISS_PIPELINE_QUEUE_INPUT;
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;
388 start = iss_pipeline_ready(pipe);
390 pipe->state |= ISS_PIPELINE_STREAM;
391 spin_unlock_irqrestore(&pipe->lock, flags);
394 omap4iss_pipeline_set_stream(pipe,
395 ISS_PIPELINE_STREAM_SINGLESHOT);
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,
407 * omap4iss_video_buffer_next - Complete the current buffer and return the next
408 * @video: ISS video object
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.
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.
416 * The DMA queue is expected to contain at least one buffer.
418 * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
421 struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video)
423 struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
424 enum iss_pipeline_state state;
425 struct iss_buffer *buf;
429 spin_lock_irqsave(&video->qlock, flags);
430 if (WARN_ON(list_empty(&video->dmaqueue))) {
431 spin_unlock_irqrestore(&video->qlock, flags);
435 buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
437 list_del(&buf->list);
438 spin_unlock_irqrestore(&video->qlock, flags);
441 buf->vb.v4l2_buf.timestamp.tv_sec = ts.tv_sec;
442 buf->vb.v4l2_buf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
444 /* Do frame number propagation only if this is the output video node.
445 * Frame number either comes from the CSI receivers or it gets
446 * incremented here if H3A is not active.
447 * Note: There is no guarantee that the output buffer will finish
448 * first, so the input number might lag behind by 1 in some cases.
450 if (video == pipe->output && !pipe->do_propagation)
451 buf->vb.v4l2_buf.sequence =
452 atomic_inc_return(&pipe->frame_number);
454 buf->vb.v4l2_buf.sequence = atomic_read(&pipe->frame_number);
456 vb2_buffer_done(&buf->vb, pipe->error ?
457 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
460 spin_lock_irqsave(&video->qlock, flags);
461 if (list_empty(&video->dmaqueue)) {
462 spin_unlock_irqrestore(&video->qlock, flags);
463 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
464 state = ISS_PIPELINE_QUEUE_OUTPUT
465 | ISS_PIPELINE_STREAM;
467 state = ISS_PIPELINE_QUEUE_INPUT
468 | ISS_PIPELINE_STREAM;
470 spin_lock_irqsave(&pipe->lock, flags);
471 pipe->state &= ~state;
472 if (video->pipe.stream_state == ISS_PIPELINE_STREAM_CONTINUOUS)
473 video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN;
474 spin_unlock_irqrestore(&pipe->lock, flags);
478 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
479 spin_lock(&pipe->lock);
480 pipe->state &= ~ISS_PIPELINE_STREAM;
481 spin_unlock(&pipe->lock);
484 buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
486 spin_unlock_irqrestore(&video->qlock, flags);
487 buf->vb.state = VB2_BUF_STATE_ACTIVE;
492 * omap4iss_video_cancel_stream - Cancel stream on a video node
493 * @video: ISS video object
495 * Cancelling a stream mark all buffers on the video node as erroneous and makes
496 * sure no new buffer can be queued.
498 void omap4iss_video_cancel_stream(struct iss_video *video)
502 spin_lock_irqsave(&video->qlock, flags);
504 while (!list_empty(&video->dmaqueue)) {
505 struct iss_buffer *buf;
507 buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
509 list_del(&buf->list);
510 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
515 spin_unlock_irqrestore(&video->qlock, flags);
518 /* -----------------------------------------------------------------------------
523 iss_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
525 struct iss_video *video = video_drvdata(file);
527 strlcpy(cap->driver, ISS_VIDEO_DRIVER_NAME, sizeof(cap->driver));
528 strlcpy(cap->card, video->video.name, sizeof(cap->card));
529 strlcpy(cap->bus_info, "media", sizeof(cap->bus_info));
531 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
532 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
534 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
536 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
537 | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT;
543 iss_video_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f)
545 struct iss_video *video = video_drvdata(file);
546 struct v4l2_mbus_framefmt format;
547 unsigned int index = f->index;
551 if (f->type != video->type)
554 ret = __iss_video_get_format(video, &format);
558 for (i = 0; i < ARRAY_SIZE(formats); ++i) {
559 const struct iss_format_info *info = &formats[i];
561 if (format.code != info->code)
565 f->pixelformat = info->pixelformat;
566 strlcpy(f->description, info->description,
567 sizeof(f->description));
578 iss_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
580 struct iss_video_fh *vfh = to_iss_video_fh(fh);
581 struct iss_video *video = video_drvdata(file);
583 if (format->type != video->type)
586 mutex_lock(&video->mutex);
587 *format = vfh->format;
588 mutex_unlock(&video->mutex);
594 iss_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
596 struct iss_video_fh *vfh = to_iss_video_fh(fh);
597 struct iss_video *video = video_drvdata(file);
598 struct v4l2_mbus_framefmt fmt;
600 if (format->type != video->type)
603 mutex_lock(&video->mutex);
605 /* Fill the bytesperline and sizeimage fields by converting to media bus
606 * format and back to pixel format.
608 iss_video_pix_to_mbus(&format->fmt.pix, &fmt);
609 iss_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
611 vfh->format = *format;
613 mutex_unlock(&video->mutex);
618 iss_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
620 struct iss_video *video = video_drvdata(file);
621 struct v4l2_subdev_format fmt;
622 struct v4l2_subdev *subdev;
626 if (format->type != video->type)
629 subdev = iss_video_remote_subdev(video, &pad);
633 iss_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
636 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
637 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
641 iss_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
646 iss_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap)
648 struct iss_video *video = video_drvdata(file);
649 struct v4l2_subdev *subdev;
652 subdev = iss_video_remote_subdev(video, NULL);
656 mutex_lock(&video->mutex);
657 ret = v4l2_subdev_call(subdev, video, cropcap, cropcap);
658 mutex_unlock(&video->mutex);
660 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
664 iss_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop)
666 struct iss_video *video = video_drvdata(file);
667 struct v4l2_subdev_format format;
668 struct v4l2_subdev *subdev;
672 subdev = iss_video_remote_subdev(video, &pad);
676 /* Try the get crop operation first and fallback to get format if not
679 ret = v4l2_subdev_call(subdev, video, g_crop, crop);
680 if (ret != -ENOIOCTLCMD)
684 format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
685 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
687 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
691 crop->c.width = format.format.width;
692 crop->c.height = format.format.height;
698 iss_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
700 struct iss_video *video = video_drvdata(file);
701 struct v4l2_subdev *subdev;
704 subdev = iss_video_remote_subdev(video, NULL);
708 mutex_lock(&video->mutex);
709 ret = v4l2_subdev_call(subdev, video, s_crop, crop);
710 mutex_unlock(&video->mutex);
712 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
716 iss_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
718 struct iss_video_fh *vfh = to_iss_video_fh(fh);
719 struct iss_video *video = video_drvdata(file);
721 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
722 video->type != a->type)
725 memset(a, 0, sizeof(*a));
726 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
727 a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
728 a->parm.output.timeperframe = vfh->timeperframe;
734 iss_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
736 struct iss_video_fh *vfh = to_iss_video_fh(fh);
737 struct iss_video *video = video_drvdata(file);
739 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
740 video->type != a->type)
743 if (a->parm.output.timeperframe.denominator == 0)
744 a->parm.output.timeperframe.denominator = 1;
746 vfh->timeperframe = a->parm.output.timeperframe;
752 iss_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
754 struct iss_video_fh *vfh = to_iss_video_fh(fh);
756 return vb2_reqbufs(&vfh->queue, rb);
760 iss_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
762 struct iss_video_fh *vfh = to_iss_video_fh(fh);
764 return vb2_querybuf(&vfh->queue, b);
768 iss_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
770 struct iss_video_fh *vfh = to_iss_video_fh(fh);
772 return vb2_qbuf(&vfh->queue, b);
776 iss_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
778 struct iss_video_fh *vfh = to_iss_video_fh(fh);
780 return vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK);
786 * Every ISS pipeline has a single input and a single output. The input can be
787 * either a sensor or a video node. The output is always a video node.
789 * As every pipeline has an output video node, the ISS video objects at the
790 * pipeline output stores the pipeline state. It tracks the streaming state of
791 * both the input and output, as well as the availability of buffers.
793 * In sensor-to-memory mode, frames are always available at the pipeline input.
794 * Starting the sensor usually requires I2C transfers and must be done in
795 * interruptible context. The pipeline is started and stopped synchronously
796 * to the stream on/off commands. All modules in the pipeline will get their
797 * subdev set stream handler called. The module at the end of the pipeline must
798 * delay starting the hardware until buffers are available at its output.
800 * In memory-to-memory mode, starting/stopping the stream requires
801 * synchronization between the input and output. ISS modules can't be stopped
802 * in the middle of a frame, and at least some of the modules seem to become
803 * busy as soon as they're started, even if they don't receive a frame start
804 * event. For that reason frames need to be processed in single-shot mode. The
805 * driver needs to wait until a frame is completely processed and written to
806 * memory before restarting the pipeline for the next frame. Pipelined
807 * processing might be possible but requires more testing.
809 * Stream start must be delayed until buffers are available at both the input
810 * and output. The pipeline must be started in the videobuf queue callback with
811 * the buffers queue spinlock held. The modules subdev set stream operation must
815 iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
817 struct iss_video_fh *vfh = to_iss_video_fh(fh);
818 struct iss_video *video = video_drvdata(file);
819 struct media_entity_graph graph;
820 struct media_entity *entity;
821 enum iss_pipeline_state state;
822 struct iss_pipeline *pipe;
823 struct iss_video *far_end;
827 if (type != video->type)
830 mutex_lock(&video->stream_lock);
832 /* Start streaming on the pipeline. No link touching an entity in the
833 * pipeline can be activated or deactivated once streaming is started.
835 pipe = video->video.entity.pipe
836 ? to_iss_pipeline(&video->video.entity) : &video->pipe;
837 pipe->external = NULL;
838 pipe->external_rate = 0;
839 pipe->external_bpp = 0;
842 if (video->iss->pdata->set_constraints)
843 video->iss->pdata->set_constraints(video->iss, true);
845 ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
847 goto err_media_entity_pipeline_start;
849 entity = &video->video.entity;
850 media_entity_graph_walk_start(&graph, entity);
851 while ((entity = media_entity_graph_walk_next(&graph)))
852 pipe->entities |= 1 << entity->id;
854 /* Verify that the currently configured format matches the output of
855 * the connected subdev.
857 ret = iss_video_check_format(video, vfh);
859 goto err_iss_video_check_format;
861 video->bpl_padding = ret;
862 video->bpl_value = vfh->format.fmt.pix.bytesperline;
864 /* Find the ISS video node connected at the far end of the pipeline and
865 * update the pipeline.
867 far_end = iss_video_far_end(video);
869 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
870 state = ISS_PIPELINE_STREAM_OUTPUT | ISS_PIPELINE_IDLE_OUTPUT;
871 pipe->input = far_end;
872 pipe->output = video;
874 if (far_end == NULL) {
876 goto err_iss_video_check_format;
879 state = ISS_PIPELINE_STREAM_INPUT | ISS_PIPELINE_IDLE_INPUT;
881 pipe->output = far_end;
884 spin_lock_irqsave(&pipe->lock, flags);
885 pipe->state &= ~ISS_PIPELINE_STREAM;
886 pipe->state |= state;
887 spin_unlock_irqrestore(&pipe->lock, flags);
889 /* Set the maximum time per frame as the value requested by userspace.
890 * This is a soft limit that can be overridden if the hardware doesn't
891 * support the request limit.
893 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
894 pipe->max_timeperframe = vfh->timeperframe;
896 video->queue = &vfh->queue;
897 INIT_LIST_HEAD(&video->dmaqueue);
898 spin_lock_init(&video->qlock);
899 video->error = false;
900 atomic_set(&pipe->frame_number, -1);
902 ret = vb2_streamon(&vfh->queue, type);
904 goto err_iss_video_check_format;
906 /* In sensor-to-memory mode, the stream can be started synchronously
907 * to the stream on command. In memory-to-memory mode, it will be
908 * started when buffers are queued on both the input and output.
910 if (pipe->input == NULL) {
912 ret = omap4iss_pipeline_set_stream(pipe,
913 ISS_PIPELINE_STREAM_CONTINUOUS);
915 goto err_omap4iss_set_stream;
916 spin_lock_irqsave(&video->qlock, flags);
917 if (list_empty(&video->dmaqueue))
918 video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN;
919 spin_unlock_irqrestore(&video->qlock, flags);
922 mutex_unlock(&video->stream_lock);
925 err_omap4iss_set_stream:
926 vb2_streamoff(&vfh->queue, type);
927 err_iss_video_check_format:
928 media_entity_pipeline_stop(&video->video.entity);
929 err_media_entity_pipeline_start:
930 if (video->iss->pdata->set_constraints)
931 video->iss->pdata->set_constraints(video->iss, false);
934 mutex_unlock(&video->stream_lock);
939 iss_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
941 struct iss_video_fh *vfh = to_iss_video_fh(fh);
942 struct iss_video *video = video_drvdata(file);
943 struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
944 enum iss_pipeline_state state;
947 if (type != video->type)
950 mutex_lock(&video->stream_lock);
952 if (!vb2_is_streaming(&vfh->queue))
955 /* Update the pipeline state. */
956 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
957 state = ISS_PIPELINE_STREAM_OUTPUT
958 | ISS_PIPELINE_QUEUE_OUTPUT;
960 state = ISS_PIPELINE_STREAM_INPUT
961 | ISS_PIPELINE_QUEUE_INPUT;
963 spin_lock_irqsave(&pipe->lock, flags);
964 pipe->state &= ~state;
965 spin_unlock_irqrestore(&pipe->lock, flags);
967 /* Stop the stream. */
968 omap4iss_pipeline_set_stream(pipe, ISS_PIPELINE_STREAM_STOPPED);
969 vb2_streamoff(&vfh->queue, type);
972 if (video->iss->pdata->set_constraints)
973 video->iss->pdata->set_constraints(video->iss, false);
974 media_entity_pipeline_stop(&video->video.entity);
977 mutex_unlock(&video->stream_lock);
982 iss_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
984 if (input->index > 0)
987 strlcpy(input->name, "camera", sizeof(input->name));
988 input->type = V4L2_INPUT_TYPE_CAMERA;
994 iss_video_g_input(struct file *file, void *fh, unsigned int *input)
1002 iss_video_s_input(struct file *file, void *fh, unsigned int input)
1004 return input == 0 ? 0 : -EINVAL;
1007 static const struct v4l2_ioctl_ops iss_video_ioctl_ops = {
1008 .vidioc_querycap = iss_video_querycap,
1009 .vidioc_enum_fmt_vid_cap = iss_video_enum_format,
1010 .vidioc_g_fmt_vid_cap = iss_video_get_format,
1011 .vidioc_s_fmt_vid_cap = iss_video_set_format,
1012 .vidioc_try_fmt_vid_cap = iss_video_try_format,
1013 .vidioc_g_fmt_vid_out = iss_video_get_format,
1014 .vidioc_s_fmt_vid_out = iss_video_set_format,
1015 .vidioc_try_fmt_vid_out = iss_video_try_format,
1016 .vidioc_cropcap = iss_video_cropcap,
1017 .vidioc_g_crop = iss_video_get_crop,
1018 .vidioc_s_crop = iss_video_set_crop,
1019 .vidioc_g_parm = iss_video_get_param,
1020 .vidioc_s_parm = iss_video_set_param,
1021 .vidioc_reqbufs = iss_video_reqbufs,
1022 .vidioc_querybuf = iss_video_querybuf,
1023 .vidioc_qbuf = iss_video_qbuf,
1024 .vidioc_dqbuf = iss_video_dqbuf,
1025 .vidioc_streamon = iss_video_streamon,
1026 .vidioc_streamoff = iss_video_streamoff,
1027 .vidioc_enum_input = iss_video_enum_input,
1028 .vidioc_g_input = iss_video_g_input,
1029 .vidioc_s_input = iss_video_s_input,
1032 /* -----------------------------------------------------------------------------
1033 * V4L2 file operations
1036 static int iss_video_open(struct file *file)
1038 struct iss_video *video = video_drvdata(file);
1039 struct iss_video_fh *handle;
1040 struct vb2_queue *q;
1043 handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1047 v4l2_fh_init(&handle->vfh, &video->video);
1048 v4l2_fh_add(&handle->vfh);
1050 /* If this is the first user, initialise the pipeline. */
1051 if (omap4iss_get(video->iss) == NULL) {
1056 ret = omap4iss_pipeline_pm_use(&video->video.entity, 1);
1058 omap4iss_put(video->iss);
1062 video->alloc_ctx = vb2_dma_contig_init_ctx(video->iss->dev);
1063 if (IS_ERR(video->alloc_ctx)) {
1064 ret = PTR_ERR(video->alloc_ctx);
1065 omap4iss_put(video->iss);
1071 q->type = video->type;
1072 q->io_modes = VB2_MMAP;
1073 q->drv_priv = handle;
1074 q->ops = &iss_video_vb2ops;
1075 q->mem_ops = &vb2_dma_contig_memops;
1076 q->buf_struct_size = sizeof(struct iss_buffer);
1077 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1079 ret = vb2_queue_init(q);
1081 omap4iss_put(video->iss);
1085 memset(&handle->format, 0, sizeof(handle->format));
1086 handle->format.type = video->type;
1087 handle->timeperframe.denominator = 1;
1089 handle->video = video;
1090 file->private_data = &handle->vfh;
1094 v4l2_fh_del(&handle->vfh);
1101 static int iss_video_release(struct file *file)
1103 struct iss_video *video = video_drvdata(file);
1104 struct v4l2_fh *vfh = file->private_data;
1105 struct iss_video_fh *handle = to_iss_video_fh(vfh);
1107 /* Disable streaming and free the buffers queue resources. */
1108 iss_video_streamoff(file, vfh, video->type);
1110 omap4iss_pipeline_pm_use(&video->video.entity, 0);
1112 /* Release the videobuf2 queue */
1113 vb2_queue_release(&handle->queue);
1115 /* Release the file handle. */
1118 file->private_data = NULL;
1120 omap4iss_put(video->iss);
1125 static unsigned int iss_video_poll(struct file *file, poll_table *wait)
1127 struct iss_video_fh *vfh = to_iss_video_fh(file->private_data);
1129 return vb2_poll(&vfh->queue, file, wait);
1132 static int iss_video_mmap(struct file *file, struct vm_area_struct *vma)
1134 struct iss_video_fh *vfh = to_iss_video_fh(file->private_data);
1136 return vb2_mmap(&vfh->queue, vma);
1139 static struct v4l2_file_operations iss_video_fops = {
1140 .owner = THIS_MODULE,
1141 .unlocked_ioctl = video_ioctl2,
1142 .open = iss_video_open,
1143 .release = iss_video_release,
1144 .poll = iss_video_poll,
1145 .mmap = iss_video_mmap,
1148 /* -----------------------------------------------------------------------------
1152 static const struct iss_video_operations iss_video_dummy_ops = {
1155 int omap4iss_video_init(struct iss_video *video, const char *name)
1157 const char *direction;
1160 switch (video->type) {
1161 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1162 direction = "output";
1163 video->pad.flags = MEDIA_PAD_FL_SINK;
1165 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1166 direction = "input";
1167 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1174 ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1178 mutex_init(&video->mutex);
1179 atomic_set(&video->active, 0);
1181 spin_lock_init(&video->pipe.lock);
1182 mutex_init(&video->stream_lock);
1184 /* Initialize the video device. */
1185 if (video->ops == NULL)
1186 video->ops = &iss_video_dummy_ops;
1188 video->video.fops = &iss_video_fops;
1189 snprintf(video->video.name, sizeof(video->video.name),
1190 "OMAP4 ISS %s %s", name, direction);
1191 video->video.vfl_type = VFL_TYPE_GRABBER;
1192 video->video.release = video_device_release_empty;
1193 video->video.ioctl_ops = &iss_video_ioctl_ops;
1194 video->pipe.stream_state = ISS_PIPELINE_STREAM_STOPPED;
1196 video_set_drvdata(&video->video, video);
1201 void omap4iss_video_cleanup(struct iss_video *video)
1203 media_entity_cleanup(&video->video.entity);
1204 mutex_destroy(&video->stream_lock);
1205 mutex_destroy(&video->mutex);
1208 int omap4iss_video_register(struct iss_video *video, struct v4l2_device *vdev)
1212 video->video.v4l2_dev = vdev;
1214 ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1216 dev_err(video->iss->dev,
1217 "%s: could not register video device (%d)\n",
1223 void omap4iss_video_unregister(struct iss_video *video)
1225 video_unregister_device(&video->video);