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, struct v4l2_format *format)
237 struct v4l2_subdev_format fmt;
238 struct v4l2_subdev *subdev;
242 subdev = iss_video_remote_subdev(video, &pad);
247 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
249 mutex_lock(&video->mutex);
250 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
251 mutex_unlock(&video->mutex);
256 format->type = video->type;
257 return iss_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
261 iss_video_check_format(struct iss_video *video, struct iss_video_fh *vfh)
263 struct v4l2_format format;
266 memcpy(&format, &vfh->format, sizeof(format));
267 ret = __iss_video_get_format(video, &format);
271 if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat ||
272 vfh->format.fmt.pix.height != format.fmt.pix.height ||
273 vfh->format.fmt.pix.width != format.fmt.pix.width ||
274 vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline ||
275 vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage)
281 /* -----------------------------------------------------------------------------
282 * Video queue operations
285 static int iss_video_queue_setup(struct vb2_queue *vq,
286 const struct v4l2_format *fmt,
287 unsigned int *count, unsigned int *num_planes,
288 unsigned int sizes[], void *alloc_ctxs[])
290 struct iss_video_fh *vfh = vb2_get_drv_priv(vq);
291 struct iss_video *video = vfh->video;
293 /* Revisit multi-planar support for NV12 */
296 sizes[0] = vfh->format.fmt.pix.sizeimage;
300 alloc_ctxs[0] = video->alloc_ctx;
302 *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0]));
307 static void iss_video_buf_cleanup(struct vb2_buffer *vb)
309 struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb);
311 if (buffer->iss_addr)
312 buffer->iss_addr = 0;
315 static int iss_video_buf_prepare(struct vb2_buffer *vb)
317 struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue);
318 struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb);
319 struct iss_video *video = vfh->video;
320 unsigned long size = vfh->format.fmt.pix.sizeimage;
323 if (vb2_plane_size(vb, 0) < size)
326 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
327 if (!IS_ALIGNED(addr, 32)) {
328 dev_dbg(video->iss->dev,
329 "Buffer address must be aligned to 32 bytes boundary.\n");
333 vb2_set_plane_payload(vb, 0, size);
334 buffer->iss_addr = addr;
338 static void iss_video_buf_queue(struct vb2_buffer *vb)
340 struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue);
341 struct iss_video *video = vfh->video;
342 struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb);
343 struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
347 spin_lock_irqsave(&video->qlock, flags);
348 empty = list_empty(&video->dmaqueue);
349 list_add_tail(&buffer->list, &video->dmaqueue);
350 spin_unlock_irqrestore(&video->qlock, flags);
353 enum iss_pipeline_state state;
356 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
357 state = ISS_PIPELINE_QUEUE_OUTPUT;
359 state = ISS_PIPELINE_QUEUE_INPUT;
361 spin_lock_irqsave(&pipe->lock, flags);
362 pipe->state |= state;
363 video->ops->queue(video, buffer);
364 video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_QUEUED;
366 start = iss_pipeline_ready(pipe);
368 pipe->state |= ISS_PIPELINE_STREAM;
369 spin_unlock_irqrestore(&pipe->lock, flags);
372 omap4iss_pipeline_set_stream(pipe,
373 ISS_PIPELINE_STREAM_SINGLESHOT);
377 static struct vb2_ops iss_video_vb2ops = {
378 .queue_setup = iss_video_queue_setup,
379 .buf_prepare = iss_video_buf_prepare,
380 .buf_queue = iss_video_buf_queue,
381 .buf_cleanup = iss_video_buf_cleanup,
385 * omap4iss_video_buffer_next - Complete the current buffer and return the next
386 * @video: ISS video object
388 * Remove the current video buffer from the DMA queue and fill its timestamp,
389 * field count and state fields before waking up its completion handler.
391 * For capture video nodes, the buffer state is set to VB2_BUF_STATE_DONE if no
392 * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise.
394 * The DMA queue is expected to contain at least one buffer.
396 * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
399 struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video)
401 struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
402 enum iss_pipeline_state state;
403 struct iss_buffer *buf;
407 spin_lock_irqsave(&video->qlock, flags);
408 if (WARN_ON(list_empty(&video->dmaqueue))) {
409 spin_unlock_irqrestore(&video->qlock, flags);
413 buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
415 list_del(&buf->list);
416 spin_unlock_irqrestore(&video->qlock, flags);
419 buf->vb.v4l2_buf.timestamp.tv_sec = ts.tv_sec;
420 buf->vb.v4l2_buf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
422 /* Do frame number propagation only if this is the output video node.
423 * Frame number either comes from the CSI receivers or it gets
424 * incremented here if H3A is not active.
425 * Note: There is no guarantee that the output buffer will finish
426 * first, so the input number might lag behind by 1 in some cases.
428 if (video == pipe->output && !pipe->do_propagation)
429 buf->vb.v4l2_buf.sequence =
430 atomic_inc_return(&pipe->frame_number);
432 buf->vb.v4l2_buf.sequence = atomic_read(&pipe->frame_number);
434 vb2_buffer_done(&buf->vb, pipe->error ?
435 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
438 spin_lock_irqsave(&video->qlock, flags);
439 if (list_empty(&video->dmaqueue)) {
440 spin_unlock_irqrestore(&video->qlock, flags);
441 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
442 state = ISS_PIPELINE_QUEUE_OUTPUT
443 | ISS_PIPELINE_STREAM;
445 state = ISS_PIPELINE_QUEUE_INPUT
446 | ISS_PIPELINE_STREAM;
448 spin_lock_irqsave(&pipe->lock, flags);
449 pipe->state &= ~state;
450 if (video->pipe.stream_state == ISS_PIPELINE_STREAM_CONTINUOUS)
451 video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN;
452 spin_unlock_irqrestore(&pipe->lock, flags);
456 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
457 spin_lock_irqsave(&pipe->lock, flags);
458 pipe->state &= ~ISS_PIPELINE_STREAM;
459 spin_unlock_irqrestore(&pipe->lock, flags);
462 buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
464 spin_unlock_irqrestore(&video->qlock, flags);
465 buf->vb.state = VB2_BUF_STATE_ACTIVE;
469 /* -----------------------------------------------------------------------------
474 iss_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
476 struct iss_video *video = video_drvdata(file);
478 strlcpy(cap->driver, ISS_VIDEO_DRIVER_NAME, sizeof(cap->driver));
479 strlcpy(cap->card, video->video.name, sizeof(cap->card));
480 strlcpy(cap->bus_info, "media", sizeof(cap->bus_info));
482 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
483 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
485 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
487 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
488 | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT;
494 iss_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
496 struct iss_video_fh *vfh = to_iss_video_fh(fh);
497 struct iss_video *video = video_drvdata(file);
499 if (format->type != video->type)
502 mutex_lock(&video->mutex);
503 *format = vfh->format;
504 mutex_unlock(&video->mutex);
510 iss_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
512 struct iss_video_fh *vfh = to_iss_video_fh(fh);
513 struct iss_video *video = video_drvdata(file);
514 struct v4l2_mbus_framefmt fmt;
516 if (format->type != video->type)
519 mutex_lock(&video->mutex);
521 /* Fill the bytesperline and sizeimage fields by converting to media bus
522 * format and back to pixel format.
524 iss_video_pix_to_mbus(&format->fmt.pix, &fmt);
525 iss_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
527 vfh->format = *format;
529 mutex_unlock(&video->mutex);
534 iss_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
536 struct iss_video *video = video_drvdata(file);
537 struct v4l2_subdev_format fmt;
538 struct v4l2_subdev *subdev;
542 if (format->type != video->type)
545 subdev = iss_video_remote_subdev(video, &pad);
549 iss_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
552 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
553 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
557 iss_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
562 iss_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap)
564 struct iss_video *video = video_drvdata(file);
565 struct v4l2_subdev *subdev;
568 subdev = iss_video_remote_subdev(video, NULL);
572 mutex_lock(&video->mutex);
573 ret = v4l2_subdev_call(subdev, video, cropcap, cropcap);
574 mutex_unlock(&video->mutex);
576 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
580 iss_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop)
582 struct iss_video *video = video_drvdata(file);
583 struct v4l2_subdev_format format;
584 struct v4l2_subdev *subdev;
588 subdev = iss_video_remote_subdev(video, &pad);
592 /* Try the get crop operation first and fallback to get format if not
595 ret = v4l2_subdev_call(subdev, video, g_crop, crop);
596 if (ret != -ENOIOCTLCMD)
600 format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
601 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
603 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
607 crop->c.width = format.format.width;
608 crop->c.height = format.format.height;
614 iss_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
616 struct iss_video *video = video_drvdata(file);
617 struct v4l2_subdev *subdev;
620 subdev = iss_video_remote_subdev(video, NULL);
624 mutex_lock(&video->mutex);
625 ret = v4l2_subdev_call(subdev, video, s_crop, crop);
626 mutex_unlock(&video->mutex);
628 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
632 iss_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
634 struct iss_video_fh *vfh = to_iss_video_fh(fh);
635 struct iss_video *video = video_drvdata(file);
637 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
638 video->type != a->type)
641 memset(a, 0, sizeof(*a));
642 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
643 a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
644 a->parm.output.timeperframe = vfh->timeperframe;
650 iss_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
652 struct iss_video_fh *vfh = to_iss_video_fh(fh);
653 struct iss_video *video = video_drvdata(file);
655 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
656 video->type != a->type)
659 if (a->parm.output.timeperframe.denominator == 0)
660 a->parm.output.timeperframe.denominator = 1;
662 vfh->timeperframe = a->parm.output.timeperframe;
668 iss_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
670 struct iss_video_fh *vfh = to_iss_video_fh(fh);
672 return vb2_reqbufs(&vfh->queue, rb);
676 iss_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
678 struct iss_video_fh *vfh = to_iss_video_fh(fh);
680 return vb2_querybuf(&vfh->queue, b);
684 iss_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
686 struct iss_video_fh *vfh = to_iss_video_fh(fh);
688 return vb2_qbuf(&vfh->queue, b);
692 iss_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
694 struct iss_video_fh *vfh = to_iss_video_fh(fh);
696 return vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK);
702 * Every ISS pipeline has a single input and a single output. The input can be
703 * either a sensor or a video node. The output is always a video node.
705 * As every pipeline has an output video node, the ISS video objects at the
706 * pipeline output stores the pipeline state. It tracks the streaming state of
707 * both the input and output, as well as the availability of buffers.
709 * In sensor-to-memory mode, frames are always available at the pipeline input.
710 * Starting the sensor usually requires I2C transfers and must be done in
711 * interruptible context. The pipeline is started and stopped synchronously
712 * to the stream on/off commands. All modules in the pipeline will get their
713 * subdev set stream handler called. The module at the end of the pipeline must
714 * delay starting the hardware until buffers are available at its output.
716 * In memory-to-memory mode, starting/stopping the stream requires
717 * synchronization between the input and output. ISS modules can't be stopped
718 * in the middle of a frame, and at least some of the modules seem to become
719 * busy as soon as they're started, even if they don't receive a frame start
720 * event. For that reason frames need to be processed in single-shot mode. The
721 * driver needs to wait until a frame is completely processed and written to
722 * memory before restarting the pipeline for the next frame. Pipelined
723 * processing might be possible but requires more testing.
725 * Stream start must be delayed until buffers are available at both the input
726 * and output. The pipeline must be started in the videobuf queue callback with
727 * the buffers queue spinlock held. The modules subdev set stream operation must
731 iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
733 struct iss_video_fh *vfh = to_iss_video_fh(fh);
734 struct iss_video *video = video_drvdata(file);
735 enum iss_pipeline_state state;
736 struct iss_pipeline *pipe;
737 struct iss_video *far_end;
741 if (type != video->type)
744 mutex_lock(&video->stream_lock);
746 /* Start streaming on the pipeline. No link touching an entity in the
747 * pipeline can be activated or deactivated once streaming is started.
749 pipe = video->video.entity.pipe
750 ? to_iss_pipeline(&video->video.entity) : &video->pipe;
751 pipe->external = NULL;
752 pipe->external_rate = 0;
753 pipe->external_bpp = 0;
755 if (video->iss->pdata->set_constraints)
756 video->iss->pdata->set_constraints(video->iss, true);
758 ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
760 goto err_media_entity_pipeline_start;
762 /* Verify that the currently configured format matches the output of
763 * the connected subdev.
765 ret = iss_video_check_format(video, vfh);
767 goto err_iss_video_check_format;
769 video->bpl_padding = ret;
770 video->bpl_value = vfh->format.fmt.pix.bytesperline;
772 /* Find the ISS video node connected at the far end of the pipeline and
773 * update the pipeline.
775 far_end = iss_video_far_end(video);
777 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
778 state = ISS_PIPELINE_STREAM_OUTPUT | ISS_PIPELINE_IDLE_OUTPUT;
779 pipe->input = far_end;
780 pipe->output = video;
782 if (far_end == NULL) {
784 goto err_iss_video_check_format;
787 state = ISS_PIPELINE_STREAM_INPUT | ISS_PIPELINE_IDLE_INPUT;
789 pipe->output = far_end;
792 spin_lock_irqsave(&pipe->lock, flags);
793 pipe->state &= ~ISS_PIPELINE_STREAM;
794 pipe->state |= state;
795 spin_unlock_irqrestore(&pipe->lock, flags);
797 /* Set the maximum time per frame as the value requested by userspace.
798 * This is a soft limit that can be overridden if the hardware doesn't
799 * support the request limit.
801 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
802 pipe->max_timeperframe = vfh->timeperframe;
804 video->queue = &vfh->queue;
805 INIT_LIST_HEAD(&video->dmaqueue);
806 spin_lock_init(&video->qlock);
807 atomic_set(&pipe->frame_number, -1);
809 ret = vb2_streamon(&vfh->queue, type);
811 goto err_iss_video_check_format;
813 /* In sensor-to-memory mode, the stream can be started synchronously
814 * to the stream on command. In memory-to-memory mode, it will be
815 * started when buffers are queued on both the input and output.
817 if (pipe->input == NULL) {
819 ret = omap4iss_pipeline_set_stream(pipe,
820 ISS_PIPELINE_STREAM_CONTINUOUS);
822 goto err_omap4iss_set_stream;
823 spin_lock_irqsave(&video->qlock, flags);
824 if (list_empty(&video->dmaqueue))
825 video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN;
826 spin_unlock_irqrestore(&video->qlock, flags);
829 mutex_unlock(&video->stream_lock);
832 err_omap4iss_set_stream:
833 vb2_streamoff(&vfh->queue, type);
834 err_iss_video_check_format:
835 media_entity_pipeline_stop(&video->video.entity);
836 err_media_entity_pipeline_start:
837 if (video->iss->pdata->set_constraints)
838 video->iss->pdata->set_constraints(video->iss, false);
841 mutex_unlock(&video->stream_lock);
846 iss_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
848 struct iss_video_fh *vfh = to_iss_video_fh(fh);
849 struct iss_video *video = video_drvdata(file);
850 struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
851 enum iss_pipeline_state state;
854 if (type != video->type)
857 mutex_lock(&video->stream_lock);
859 if (!vb2_is_streaming(&vfh->queue))
862 /* Update the pipeline state. */
863 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
864 state = ISS_PIPELINE_STREAM_OUTPUT
865 | ISS_PIPELINE_QUEUE_OUTPUT;
867 state = ISS_PIPELINE_STREAM_INPUT
868 | ISS_PIPELINE_QUEUE_INPUT;
870 spin_lock_irqsave(&pipe->lock, flags);
871 pipe->state &= ~state;
872 spin_unlock_irqrestore(&pipe->lock, flags);
874 /* Stop the stream. */
875 omap4iss_pipeline_set_stream(pipe, ISS_PIPELINE_STREAM_STOPPED);
876 vb2_streamoff(&vfh->queue, type);
879 if (video->iss->pdata->set_constraints)
880 video->iss->pdata->set_constraints(video->iss, false);
881 media_entity_pipeline_stop(&video->video.entity);
884 mutex_unlock(&video->stream_lock);
889 iss_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
891 if (input->index > 0)
894 strlcpy(input->name, "camera", sizeof(input->name));
895 input->type = V4L2_INPUT_TYPE_CAMERA;
901 iss_video_g_input(struct file *file, void *fh, unsigned int *input)
909 iss_video_s_input(struct file *file, void *fh, unsigned int input)
911 return input == 0 ? 0 : -EINVAL;
914 static const struct v4l2_ioctl_ops iss_video_ioctl_ops = {
915 .vidioc_querycap = iss_video_querycap,
916 .vidioc_g_fmt_vid_cap = iss_video_get_format,
917 .vidioc_s_fmt_vid_cap = iss_video_set_format,
918 .vidioc_try_fmt_vid_cap = iss_video_try_format,
919 .vidioc_g_fmt_vid_out = iss_video_get_format,
920 .vidioc_s_fmt_vid_out = iss_video_set_format,
921 .vidioc_try_fmt_vid_out = iss_video_try_format,
922 .vidioc_cropcap = iss_video_cropcap,
923 .vidioc_g_crop = iss_video_get_crop,
924 .vidioc_s_crop = iss_video_set_crop,
925 .vidioc_g_parm = iss_video_get_param,
926 .vidioc_s_parm = iss_video_set_param,
927 .vidioc_reqbufs = iss_video_reqbufs,
928 .vidioc_querybuf = iss_video_querybuf,
929 .vidioc_qbuf = iss_video_qbuf,
930 .vidioc_dqbuf = iss_video_dqbuf,
931 .vidioc_streamon = iss_video_streamon,
932 .vidioc_streamoff = iss_video_streamoff,
933 .vidioc_enum_input = iss_video_enum_input,
934 .vidioc_g_input = iss_video_g_input,
935 .vidioc_s_input = iss_video_s_input,
938 /* -----------------------------------------------------------------------------
939 * V4L2 file operations
942 static int iss_video_open(struct file *file)
944 struct iss_video *video = video_drvdata(file);
945 struct iss_video_fh *handle;
949 handle = kzalloc(sizeof(*handle), GFP_KERNEL);
953 v4l2_fh_init(&handle->vfh, &video->video);
954 v4l2_fh_add(&handle->vfh);
956 /* If this is the first user, initialise the pipeline. */
957 if (omap4iss_get(video->iss) == NULL) {
962 ret = omap4iss_pipeline_pm_use(&video->video.entity, 1);
964 omap4iss_put(video->iss);
968 video->alloc_ctx = vb2_dma_contig_init_ctx(video->iss->dev);
969 if (IS_ERR(video->alloc_ctx)) {
970 ret = PTR_ERR(video->alloc_ctx);
971 omap4iss_put(video->iss);
977 q->type = video->type;
978 q->io_modes = VB2_MMAP;
979 q->drv_priv = handle;
980 q->ops = &iss_video_vb2ops;
981 q->mem_ops = &vb2_dma_contig_memops;
982 q->buf_struct_size = sizeof(struct iss_buffer);
983 q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
985 ret = vb2_queue_init(q);
987 omap4iss_put(video->iss);
991 memset(&handle->format, 0, sizeof(handle->format));
992 handle->format.type = video->type;
993 handle->timeperframe.denominator = 1;
995 handle->video = video;
996 file->private_data = &handle->vfh;
1000 v4l2_fh_del(&handle->vfh);
1007 static int iss_video_release(struct file *file)
1009 struct iss_video *video = video_drvdata(file);
1010 struct v4l2_fh *vfh = file->private_data;
1011 struct iss_video_fh *handle = to_iss_video_fh(vfh);
1013 /* Disable streaming and free the buffers queue resources. */
1014 iss_video_streamoff(file, vfh, video->type);
1016 omap4iss_pipeline_pm_use(&video->video.entity, 0);
1018 /* Release the videobuf2 queue */
1019 vb2_queue_release(&handle->queue);
1021 /* Release the file handle. */
1024 file->private_data = NULL;
1026 omap4iss_put(video->iss);
1031 static unsigned int iss_video_poll(struct file *file, poll_table *wait)
1033 struct iss_video_fh *vfh = to_iss_video_fh(file->private_data);
1035 return vb2_poll(&vfh->queue, file, wait);
1038 static int iss_video_mmap(struct file *file, struct vm_area_struct *vma)
1040 struct iss_video_fh *vfh = to_iss_video_fh(file->private_data);
1042 return vb2_mmap(&vfh->queue, vma);
1045 static struct v4l2_file_operations iss_video_fops = {
1046 .owner = THIS_MODULE,
1047 .unlocked_ioctl = video_ioctl2,
1048 .open = iss_video_open,
1049 .release = iss_video_release,
1050 .poll = iss_video_poll,
1051 .mmap = iss_video_mmap,
1054 /* -----------------------------------------------------------------------------
1058 static const struct iss_video_operations iss_video_dummy_ops = {
1061 int omap4iss_video_init(struct iss_video *video, const char *name)
1063 const char *direction;
1066 switch (video->type) {
1067 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1068 direction = "output";
1069 video->pad.flags = MEDIA_PAD_FL_SINK;
1071 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1072 direction = "input";
1073 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1080 ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1084 mutex_init(&video->mutex);
1085 atomic_set(&video->active, 0);
1087 spin_lock_init(&video->pipe.lock);
1088 mutex_init(&video->stream_lock);
1090 /* Initialize the video device. */
1091 if (video->ops == NULL)
1092 video->ops = &iss_video_dummy_ops;
1094 video->video.fops = &iss_video_fops;
1095 snprintf(video->video.name, sizeof(video->video.name),
1096 "OMAP4 ISS %s %s", name, direction);
1097 video->video.vfl_type = VFL_TYPE_GRABBER;
1098 video->video.release = video_device_release_empty;
1099 video->video.ioctl_ops = &iss_video_ioctl_ops;
1100 video->pipe.stream_state = ISS_PIPELINE_STREAM_STOPPED;
1102 video_set_drvdata(&video->video, video);
1107 void omap4iss_video_cleanup(struct iss_video *video)
1109 media_entity_cleanup(&video->video.entity);
1110 mutex_destroy(&video->stream_lock);
1111 mutex_destroy(&video->mutex);
1114 int omap4iss_video_register(struct iss_video *video, struct v4l2_device *vdev)
1118 video->video.v4l2_dev = vdev;
1120 ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1122 dev_err(video->iss->dev,
1123 "%s: could not register video device (%d)\n",
1129 void omap4iss_video_unregister(struct iss_video *video)
1131 video_unregister_device(&video->video);