2 * A virtual v4l2-mem2mem example device.
4 * This is a virtual device driver for testing mem-to-mem videobuf framework.
5 * It simulates a device that uses memory buffers for both source and
6 * destination, processes the data and issues an "irq" (simulated by a timer).
7 * The device is capable of multi-instance, multi-buffer-per-transaction
8 * operation (via the mem2mem framework).
10 * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
11 * Pawel Osciak, <pawel@osciak.com>
12 * Marek Szyprowski, <m.szyprowski@samsung.com>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version
19 #include <linux/module.h>
20 #include <linux/delay.h>
22 #include <linux/timer.h>
23 #include <linux/sched.h>
24 #include <linux/slab.h>
26 #include <linux/platform_device.h>
27 #include <media/v4l2-mem2mem.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-ioctl.h>
30 #include <media/v4l2-ctrls.h>
31 #include <media/v4l2-event.h>
32 #include <media/videobuf2-vmalloc.h>
34 MODULE_DESCRIPTION("Virtual device for mem2mem framework testing");
35 MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>");
36 MODULE_LICENSE("GPL");
37 MODULE_VERSION("0.1.1");
38 MODULE_ALIAS("mem2mem_testdev");
40 static unsigned debug;
41 module_param(debug, uint, 0644);
42 MODULE_PARM_DESC(debug, "activates debug info");
48 #define DIM_ALIGN_MASK 7 /* 8-byte alignment for line length */
50 /* Flags that indicate a format can be used for capture/output */
51 #define MEM2MEM_CAPTURE (1 << 0)
52 #define MEM2MEM_OUTPUT (1 << 1)
54 #define MEM2MEM_NAME "vim2m"
57 #define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME
58 /* In bytes, per queue */
59 #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024)
61 /* Default transaction time in msec */
62 #define MEM2MEM_DEF_TRANSTIME 40
63 #define MEM2MEM_COLOR_STEP (0xff >> 4)
64 #define MEM2MEM_NUM_TILES 8
66 /* Flags that indicate processing mode */
67 #define MEM2MEM_HFLIP (1 << 0)
68 #define MEM2MEM_VFLIP (1 << 1)
70 #define dprintk(dev, fmt, arg...) \
71 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
74 static void vim2m_dev_release(struct device *dev)
77 static struct platform_device vim2m_pdev = {
79 .dev.release = vim2m_dev_release,
85 /* Types the format can be used for */
89 static struct vim2m_fmt formats[] = {
91 .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
93 /* Both capture and output format */
94 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
97 .fourcc = V4L2_PIX_FMT_YUYV,
99 /* Output-only format */
100 .types = MEM2MEM_OUTPUT,
104 #define NUM_FORMATS ARRAY_SIZE(formats)
106 /* Per-queue, driver-specific private data */
107 struct vim2m_q_data {
110 unsigned int sizeimage;
111 unsigned int sequence;
112 struct vim2m_fmt *fmt;
120 #define V4L2_CID_TRANS_TIME_MSEC (V4L2_CID_USER_BASE + 0x1000)
121 #define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_USER_BASE + 0x1001)
123 static struct vim2m_fmt *find_format(struct v4l2_format *f)
125 struct vim2m_fmt *fmt;
128 for (k = 0; k < NUM_FORMATS; k++) {
130 if (fmt->fourcc == f->fmt.pix.pixelformat)
134 if (k == NUM_FORMATS)
141 struct v4l2_device v4l2_dev;
142 struct video_device vfd;
145 struct mutex dev_mutex;
148 struct timer_list timer;
150 struct v4l2_m2m_dev *m2m_dev;
155 struct vim2m_dev *dev;
157 struct v4l2_ctrl_handler hdl;
159 /* Processed buffers in this transaction */
162 /* Transaction length (i.e. how many buffers per transaction) */
164 /* Transaction time (i.e. simulated processing time) in milliseconds */
167 /* Abort requested by m2m */
170 /* Processing mode */
173 enum v4l2_colorspace colorspace;
175 /* Source and destination queue data */
176 struct vim2m_q_data q_data[2];
179 static inline struct vim2m_ctx *file2ctx(struct file *file)
181 return container_of(file->private_data, struct vim2m_ctx, fh);
184 static struct vim2m_q_data *get_q_data(struct vim2m_ctx *ctx,
185 enum v4l2_buf_type type)
188 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
189 return &ctx->q_data[V4L2_M2M_SRC];
190 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
191 return &ctx->q_data[V4L2_M2M_DST];
199 static int device_process(struct vim2m_ctx *ctx,
200 struct vb2_buffer *in_vb,
201 struct vb2_buffer *out_vb)
203 struct vim2m_dev *dev = ctx->dev;
204 struct vim2m_q_data *q_data;
207 int tile_w, bytes_left;
208 int width, height, bytesperline;
210 q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
212 width = q_data->width;
213 height = q_data->height;
214 bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
216 p_in = vb2_plane_vaddr(in_vb, 0);
217 p_out = vb2_plane_vaddr(out_vb, 0);
218 if (!p_in || !p_out) {
219 v4l2_err(&dev->v4l2_dev,
220 "Acquiring kernel pointers to buffers failed\n");
224 if (vb2_plane_size(in_vb, 0) > vb2_plane_size(out_vb, 0)) {
225 v4l2_err(&dev->v4l2_dev, "Output buffer is too small\n");
229 tile_w = (width * (q_data[V4L2_M2M_DST].fmt->depth >> 3))
231 bytes_left = bytesperline - tile_w * MEM2MEM_NUM_TILES;
234 out_vb->v4l2_buf.sequence = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE)->sequence++;
235 in_vb->v4l2_buf.sequence = q_data->sequence++;
236 memcpy(&out_vb->v4l2_buf.timestamp,
237 &in_vb->v4l2_buf.timestamp,
238 sizeof(struct timeval));
239 if (in_vb->v4l2_buf.flags & V4L2_BUF_FLAG_TIMECODE)
240 memcpy(&out_vb->v4l2_buf.timecode, &in_vb->v4l2_buf.timecode,
241 sizeof(struct v4l2_timecode));
242 out_vb->v4l2_buf.field = in_vb->v4l2_buf.field;
243 out_vb->v4l2_buf.flags = in_vb->v4l2_buf.flags &
244 (V4L2_BUF_FLAG_TIMECODE |
245 V4L2_BUF_FLAG_KEYFRAME |
246 V4L2_BUF_FLAG_PFRAME |
247 V4L2_BUF_FLAG_BFRAME |
248 V4L2_BUF_FLAG_TSTAMP_SRC_MASK);
251 case MEM2MEM_HFLIP | MEM2MEM_VFLIP:
252 p_out += bytesperline * height - bytes_left;
253 for (y = 0; y < height; ++y) {
254 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
256 for (x = 0; x < tile_w; ++x)
260 for (x = 0; x < tile_w; ++x)
272 for (y = 0; y < height; ++y) {
273 p_out += MEM2MEM_NUM_TILES * tile_w;
274 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
276 for (x = 0; x < tile_w; ++x)
280 for (x = 0; x < tile_w; ++x)
287 p_out += bytesperline;
292 p_out += bytesperline * (height - 1);
293 for (y = 0; y < height; ++y) {
294 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
296 for (x = 0; x < tile_w; ++x)
300 for (x = 0; x < tile_w; ++x)
307 p_out += bytes_left - 2 * bytesperline;
312 for (y = 0; y < height; ++y) {
313 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
315 for (x = 0; x < tile_w; ++x)
319 for (x = 0; x < tile_w; ++x)
333 static void schedule_irq(struct vim2m_dev *dev, int msec_timeout)
335 dprintk(dev, "Scheduling a simulated irq\n");
336 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(msec_timeout));
344 * job_ready() - check whether an instance is ready to be scheduled to run
346 static int job_ready(void *priv)
348 struct vim2m_ctx *ctx = priv;
350 if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen
351 || v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen) {
352 dprintk(ctx->dev, "Not enough buffers available\n");
359 static void job_abort(void *priv)
361 struct vim2m_ctx *ctx = priv;
363 /* Will cancel the transaction in the next interrupt handler */
367 /* device_run() - prepares and starts the device
369 * This simulates all the immediate preparations required before starting
370 * a device. This will be called by the framework when it decides to schedule
371 * a particular instance.
373 static void device_run(void *priv)
375 struct vim2m_ctx *ctx = priv;
376 struct vim2m_dev *dev = ctx->dev;
377 struct vb2_buffer *src_buf, *dst_buf;
379 src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
380 dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
382 device_process(ctx, src_buf, dst_buf);
384 /* Run a timer, which simulates a hardware irq */
385 schedule_irq(dev, ctx->transtime);
388 static void device_isr(unsigned long priv)
390 struct vim2m_dev *vim2m_dev = (struct vim2m_dev *)priv;
391 struct vim2m_ctx *curr_ctx;
392 struct vb2_buffer *src_vb, *dst_vb;
395 curr_ctx = v4l2_m2m_get_curr_priv(vim2m_dev->m2m_dev);
397 if (NULL == curr_ctx) {
398 pr_err("Instance released before the end of transaction\n");
402 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
403 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
405 curr_ctx->num_processed++;
407 spin_lock_irqsave(&vim2m_dev->irqlock, flags);
408 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
409 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
410 spin_unlock_irqrestore(&vim2m_dev->irqlock, flags);
412 if (curr_ctx->num_processed == curr_ctx->translen
413 || curr_ctx->aborting) {
414 dprintk(curr_ctx->dev, "Finishing transaction\n");
415 curr_ctx->num_processed = 0;
416 v4l2_m2m_job_finish(vim2m_dev->m2m_dev, curr_ctx->fh.m2m_ctx);
418 device_run(curr_ctx);
425 static int vidioc_querycap(struct file *file, void *priv,
426 struct v4l2_capability *cap)
428 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
429 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
430 snprintf(cap->bus_info, sizeof(cap->bus_info),
431 "platform:%s", MEM2MEM_NAME);
432 cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
433 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
437 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
440 struct vim2m_fmt *fmt;
444 for (i = 0; i < NUM_FORMATS; ++i) {
445 if (formats[i].types & type) {
446 /* index-th format of type type found ? */
449 /* Correct type but haven't reached our index yet,
450 * just increment per-type index */
455 if (i < NUM_FORMATS) {
458 f->pixelformat = fmt->fourcc;
462 /* Format not found */
466 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
467 struct v4l2_fmtdesc *f)
469 return enum_fmt(f, MEM2MEM_CAPTURE);
472 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
473 struct v4l2_fmtdesc *f)
475 return enum_fmt(f, MEM2MEM_OUTPUT);
478 static int vidioc_g_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
480 struct vb2_queue *vq;
481 struct vim2m_q_data *q_data;
483 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
487 q_data = get_q_data(ctx, f->type);
489 f->fmt.pix.width = q_data->width;
490 f->fmt.pix.height = q_data->height;
491 f->fmt.pix.field = V4L2_FIELD_NONE;
492 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
493 f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
494 f->fmt.pix.sizeimage = q_data->sizeimage;
495 f->fmt.pix.colorspace = ctx->colorspace;
500 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
501 struct v4l2_format *f)
503 return vidioc_g_fmt(file2ctx(file), f);
506 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
507 struct v4l2_format *f)
509 return vidioc_g_fmt(file2ctx(file), f);
512 static int vidioc_try_fmt(struct v4l2_format *f, struct vim2m_fmt *fmt)
514 /* V4L2 specification suggests the driver corrects the format struct
515 * if any of the dimensions is unsupported */
516 if (f->fmt.pix.height < MIN_H)
517 f->fmt.pix.height = MIN_H;
518 else if (f->fmt.pix.height > MAX_H)
519 f->fmt.pix.height = MAX_H;
521 if (f->fmt.pix.width < MIN_W)
522 f->fmt.pix.width = MIN_W;
523 else if (f->fmt.pix.width > MAX_W)
524 f->fmt.pix.width = MAX_W;
526 f->fmt.pix.width &= ~DIM_ALIGN_MASK;
527 f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
528 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
529 f->fmt.pix.field = V4L2_FIELD_NONE;
534 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
535 struct v4l2_format *f)
537 struct vim2m_fmt *fmt;
538 struct vim2m_ctx *ctx = file2ctx(file);
540 fmt = find_format(f);
542 f->fmt.pix.pixelformat = formats[0].fourcc;
543 fmt = find_format(f);
545 if (!(fmt->types & MEM2MEM_CAPTURE)) {
546 v4l2_err(&ctx->dev->v4l2_dev,
547 "Fourcc format (0x%08x) invalid.\n",
548 f->fmt.pix.pixelformat);
551 f->fmt.pix.colorspace = ctx->colorspace;
553 return vidioc_try_fmt(f, fmt);
556 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
557 struct v4l2_format *f)
559 struct vim2m_fmt *fmt;
560 struct vim2m_ctx *ctx = file2ctx(file);
562 fmt = find_format(f);
564 f->fmt.pix.pixelformat = formats[0].fourcc;
565 fmt = find_format(f);
567 if (!(fmt->types & MEM2MEM_OUTPUT)) {
568 v4l2_err(&ctx->dev->v4l2_dev,
569 "Fourcc format (0x%08x) invalid.\n",
570 f->fmt.pix.pixelformat);
573 if (!f->fmt.pix.colorspace)
574 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
576 return vidioc_try_fmt(f, fmt);
579 static int vidioc_s_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
581 struct vim2m_q_data *q_data;
582 struct vb2_queue *vq;
584 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
588 q_data = get_q_data(ctx, f->type);
592 if (vb2_is_busy(vq)) {
593 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
597 q_data->fmt = find_format(f);
598 q_data->width = f->fmt.pix.width;
599 q_data->height = f->fmt.pix.height;
600 q_data->sizeimage = q_data->width * q_data->height
601 * q_data->fmt->depth >> 3;
604 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
605 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
610 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
611 struct v4l2_format *f)
615 ret = vidioc_try_fmt_vid_cap(file, priv, f);
619 return vidioc_s_fmt(file2ctx(file), f);
622 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
623 struct v4l2_format *f)
625 struct vim2m_ctx *ctx = file2ctx(file);
628 ret = vidioc_try_fmt_vid_out(file, priv, f);
632 ret = vidioc_s_fmt(file2ctx(file), f);
634 ctx->colorspace = f->fmt.pix.colorspace;
638 static int vim2m_s_ctrl(struct v4l2_ctrl *ctrl)
640 struct vim2m_ctx *ctx =
641 container_of(ctrl->handler, struct vim2m_ctx, hdl);
646 ctx->mode |= MEM2MEM_HFLIP;
648 ctx->mode &= ~MEM2MEM_HFLIP;
653 ctx->mode |= MEM2MEM_VFLIP;
655 ctx->mode &= ~MEM2MEM_VFLIP;
658 case V4L2_CID_TRANS_TIME_MSEC:
659 ctx->transtime = ctrl->val;
662 case V4L2_CID_TRANS_NUM_BUFS:
663 ctx->translen = ctrl->val;
667 v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
674 static const struct v4l2_ctrl_ops vim2m_ctrl_ops = {
675 .s_ctrl = vim2m_s_ctrl,
679 static const struct v4l2_ioctl_ops vim2m_ioctl_ops = {
680 .vidioc_querycap = vidioc_querycap,
682 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
683 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
684 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
685 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
687 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
688 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
689 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
690 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
692 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
693 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
694 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
695 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
696 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
697 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
698 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
700 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
701 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
703 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
704 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
712 static int vim2m_queue_setup(struct vb2_queue *vq,
713 const struct v4l2_format *fmt,
714 unsigned int *nbuffers, unsigned int *nplanes,
715 unsigned int sizes[], void *alloc_ctxs[])
717 struct vim2m_ctx *ctx = vb2_get_drv_priv(vq);
718 struct vim2m_q_data *q_data;
719 unsigned int size, count = *nbuffers;
721 q_data = get_q_data(ctx, vq->type);
723 size = q_data->width * q_data->height * q_data->fmt->depth >> 3;
726 if (fmt->fmt.pix.sizeimage < size)
728 size = fmt->fmt.pix.sizeimage;
731 while (size * count > MEM2MEM_VID_MEM_LIMIT)
739 * videobuf2-vmalloc allocator is context-less so no need to set
743 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
748 static int vim2m_buf_prepare(struct vb2_buffer *vb)
750 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
751 struct vim2m_q_data *q_data;
753 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
755 q_data = get_q_data(ctx, vb->vb2_queue->type);
756 if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
757 if (vb->v4l2_buf.field == V4L2_FIELD_ANY)
758 vb->v4l2_buf.field = V4L2_FIELD_NONE;
759 if (vb->v4l2_buf.field != V4L2_FIELD_NONE) {
760 dprintk(ctx->dev, "%s field isn't supported\n",
766 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
767 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
768 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
772 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
777 static void vim2m_buf_queue(struct vb2_buffer *vb)
779 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
781 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vb);
784 static int vim2m_start_streaming(struct vb2_queue *q, unsigned count)
786 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
787 struct vim2m_q_data *q_data = get_q_data(ctx, q->type);
789 q_data->sequence = 0;
793 static void vim2m_stop_streaming(struct vb2_queue *q)
795 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
796 struct vb2_buffer *vb;
800 if (V4L2_TYPE_IS_OUTPUT(q->type))
801 vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
803 vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
806 spin_lock_irqsave(&ctx->dev->irqlock, flags);
807 v4l2_m2m_buf_done(vb, VB2_BUF_STATE_ERROR);
808 spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
812 static struct vb2_ops vim2m_qops = {
813 .queue_setup = vim2m_queue_setup,
814 .buf_prepare = vim2m_buf_prepare,
815 .buf_queue = vim2m_buf_queue,
816 .start_streaming = vim2m_start_streaming,
817 .stop_streaming = vim2m_stop_streaming,
818 .wait_prepare = vb2_ops_wait_prepare,
819 .wait_finish = vb2_ops_wait_finish,
822 static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
824 struct vim2m_ctx *ctx = priv;
827 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
828 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
829 src_vq->drv_priv = ctx;
830 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
831 src_vq->ops = &vim2m_qops;
832 src_vq->mem_ops = &vb2_vmalloc_memops;
833 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
834 src_vq->lock = &ctx->dev->dev_mutex;
836 ret = vb2_queue_init(src_vq);
840 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
841 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
842 dst_vq->drv_priv = ctx;
843 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
844 dst_vq->ops = &vim2m_qops;
845 dst_vq->mem_ops = &vb2_vmalloc_memops;
846 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
847 dst_vq->lock = &ctx->dev->dev_mutex;
849 return vb2_queue_init(dst_vq);
852 static const struct v4l2_ctrl_config vim2m_ctrl_trans_time_msec = {
853 .ops = &vim2m_ctrl_ops,
854 .id = V4L2_CID_TRANS_TIME_MSEC,
855 .name = "Transaction Time (msec)",
856 .type = V4L2_CTRL_TYPE_INTEGER,
857 .def = MEM2MEM_DEF_TRANSTIME,
863 static const struct v4l2_ctrl_config vim2m_ctrl_trans_num_bufs = {
864 .ops = &vim2m_ctrl_ops,
865 .id = V4L2_CID_TRANS_NUM_BUFS,
866 .name = "Buffers Per Transaction",
867 .type = V4L2_CTRL_TYPE_INTEGER,
870 .max = MEM2MEM_DEF_NUM_BUFS,
877 static int vim2m_open(struct file *file)
879 struct vim2m_dev *dev = video_drvdata(file);
880 struct vim2m_ctx *ctx = NULL;
881 struct v4l2_ctrl_handler *hdl;
884 if (mutex_lock_interruptible(&dev->dev_mutex))
886 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
892 v4l2_fh_init(&ctx->fh, video_devdata(file));
893 file->private_data = &ctx->fh;
896 v4l2_ctrl_handler_init(hdl, 4);
897 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
898 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
899 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_time_msec, NULL);
900 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_num_bufs, NULL);
903 v4l2_ctrl_handler_free(hdl);
906 ctx->fh.ctrl_handler = hdl;
907 v4l2_ctrl_handler_setup(hdl);
909 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[0];
910 ctx->q_data[V4L2_M2M_SRC].width = 640;
911 ctx->q_data[V4L2_M2M_SRC].height = 480;
912 ctx->q_data[V4L2_M2M_SRC].sizeimage =
913 ctx->q_data[V4L2_M2M_SRC].width *
914 ctx->q_data[V4L2_M2M_SRC].height *
915 (ctx->q_data[V4L2_M2M_SRC].fmt->depth >> 3);
916 ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC];
917 ctx->colorspace = V4L2_COLORSPACE_REC709;
919 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
921 if (IS_ERR(ctx->fh.m2m_ctx)) {
922 rc = PTR_ERR(ctx->fh.m2m_ctx);
924 v4l2_ctrl_handler_free(hdl);
929 v4l2_fh_add(&ctx->fh);
930 atomic_inc(&dev->num_inst);
932 dprintk(dev, "Created instance: %p, m2m_ctx: %p\n",
933 ctx, ctx->fh.m2m_ctx);
936 mutex_unlock(&dev->dev_mutex);
940 static int vim2m_release(struct file *file)
942 struct vim2m_dev *dev = video_drvdata(file);
943 struct vim2m_ctx *ctx = file2ctx(file);
945 dprintk(dev, "Releasing instance %p\n", ctx);
947 v4l2_fh_del(&ctx->fh);
948 v4l2_fh_exit(&ctx->fh);
949 v4l2_ctrl_handler_free(&ctx->hdl);
950 mutex_lock(&dev->dev_mutex);
951 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
952 mutex_unlock(&dev->dev_mutex);
955 atomic_dec(&dev->num_inst);
960 static const struct v4l2_file_operations vim2m_fops = {
961 .owner = THIS_MODULE,
963 .release = vim2m_release,
964 .poll = v4l2_m2m_fop_poll,
965 .unlocked_ioctl = video_ioctl2,
966 .mmap = v4l2_m2m_fop_mmap,
969 static struct video_device vim2m_videodev = {
970 .name = MEM2MEM_NAME,
971 .vfl_dir = VFL_DIR_M2M,
973 .ioctl_ops = &vim2m_ioctl_ops,
975 .release = video_device_release_empty,
978 static struct v4l2_m2m_ops m2m_ops = {
979 .device_run = device_run,
980 .job_ready = job_ready,
981 .job_abort = job_abort,
984 static int vim2m_probe(struct platform_device *pdev)
986 struct vim2m_dev *dev;
987 struct video_device *vfd;
990 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
994 spin_lock_init(&dev->irqlock);
996 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1000 atomic_set(&dev->num_inst, 0);
1001 mutex_init(&dev->dev_mutex);
1003 dev->vfd = vim2m_videodev;
1005 vfd->lock = &dev->dev_mutex;
1006 vfd->v4l2_dev = &dev->v4l2_dev;
1008 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1010 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
1014 video_set_drvdata(vfd, dev);
1015 snprintf(vfd->name, sizeof(vfd->name), "%s", vim2m_videodev.name);
1016 v4l2_info(&dev->v4l2_dev,
1017 "Device registered as /dev/video%d\n", vfd->num);
1019 setup_timer(&dev->timer, device_isr, (long)dev);
1020 platform_set_drvdata(pdev, dev);
1022 dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1023 if (IS_ERR(dev->m2m_dev)) {
1024 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
1025 ret = PTR_ERR(dev->m2m_dev);
1032 v4l2_m2m_release(dev->m2m_dev);
1033 video_unregister_device(&dev->vfd);
1035 v4l2_device_unregister(&dev->v4l2_dev);
1040 static int vim2m_remove(struct platform_device *pdev)
1042 struct vim2m_dev *dev = platform_get_drvdata(pdev);
1044 v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_NAME);
1045 v4l2_m2m_release(dev->m2m_dev);
1046 del_timer_sync(&dev->timer);
1047 video_unregister_device(&dev->vfd);
1048 v4l2_device_unregister(&dev->v4l2_dev);
1053 static struct platform_driver vim2m_pdrv = {
1054 .probe = vim2m_probe,
1055 .remove = vim2m_remove,
1057 .name = MEM2MEM_NAME,
1061 static void __exit vim2m_exit(void)
1063 platform_driver_unregister(&vim2m_pdrv);
1064 platform_device_unregister(&vim2m_pdev);
1067 static int __init vim2m_init(void)
1071 ret = platform_device_register(&vim2m_pdev);
1075 ret = platform_driver_register(&vim2m_pdrv);
1077 platform_device_unregister(&vim2m_pdev);
1082 module_init(vim2m_init);
1083 module_exit(vim2m_exit);