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 #define MEM2MEM_TEST_MODULE_NAME "mem2mem-testdev"
36 MODULE_DESCRIPTION("Virtual device for mem2mem framework testing");
37 MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>");
38 MODULE_LICENSE("GPL");
39 MODULE_VERSION("0.1.1");
41 static unsigned debug;
42 module_param(debug, uint, 0644);
43 MODULE_PARM_DESC(debug, "activates debug info");
49 #define DIM_ALIGN_MASK 7 /* 8-byte alignment for line length */
51 /* Flags that indicate a format can be used for capture/output */
52 #define MEM2MEM_CAPTURE (1 << 0)
53 #define MEM2MEM_OUTPUT (1 << 1)
55 #define MEM2MEM_NAME "m2m-testdev"
58 #define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME
59 /* In bytes, per queue */
60 #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024)
62 /* Default transaction time in msec */
63 #define MEM2MEM_DEF_TRANSTIME 1000
64 /* Default number of buffers per transaction */
65 #define MEM2MEM_DEF_TRANSLEN 1
66 #define MEM2MEM_COLOR_STEP (0xff >> 4)
67 #define MEM2MEM_NUM_TILES 8
69 /* Flags that indicate processing mode */
70 #define MEM2MEM_HFLIP (1 << 0)
71 #define MEM2MEM_VFLIP (1 << 1)
73 #define dprintk(dev, fmt, arg...) \
74 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
77 static void m2mtest_dev_release(struct device *dev)
80 static struct platform_device m2mtest_pdev = {
82 .dev.release = m2mtest_dev_release,
89 /* Types the format can be used for */
93 static struct m2mtest_fmt formats[] = {
95 .name = "RGB565 (BE)",
96 .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
98 /* Both capture and output format */
99 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
102 .name = "4:2:2, packed, YUYV",
103 .fourcc = V4L2_PIX_FMT_YUYV,
105 /* Output-only format */
106 .types = MEM2MEM_OUTPUT,
110 #define NUM_FORMATS ARRAY_SIZE(formats)
112 /* Per-queue, driver-specific private data */
113 struct m2mtest_q_data {
116 unsigned int sizeimage;
117 struct m2mtest_fmt *fmt;
125 #define V4L2_CID_TRANS_TIME_MSEC (V4L2_CID_USER_BASE + 0x1000)
126 #define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_USER_BASE + 0x1001)
128 static struct m2mtest_fmt *find_format(struct v4l2_format *f)
130 struct m2mtest_fmt *fmt;
133 for (k = 0; k < NUM_FORMATS; k++) {
135 if (fmt->fourcc == f->fmt.pix.pixelformat)
139 if (k == NUM_FORMATS)
146 struct v4l2_device v4l2_dev;
147 struct video_device *vfd;
150 struct mutex dev_mutex;
153 struct timer_list timer;
155 struct v4l2_m2m_dev *m2m_dev;
160 struct m2mtest_dev *dev;
162 struct v4l2_ctrl_handler hdl;
164 /* Processed buffers in this transaction */
167 /* Transaction length (i.e. how many buffers per transaction) */
169 /* Transaction time (i.e. simulated processing time) in milliseconds */
172 /* Abort requested by m2m */
175 /* Processing mode */
178 enum v4l2_colorspace colorspace;
180 /* Source and destination queue data */
181 struct m2mtest_q_data q_data[2];
184 static inline struct m2mtest_ctx *file2ctx(struct file *file)
186 return container_of(file->private_data, struct m2mtest_ctx, fh);
189 static struct m2mtest_q_data *get_q_data(struct m2mtest_ctx *ctx,
190 enum v4l2_buf_type type)
193 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
194 return &ctx->q_data[V4L2_M2M_SRC];
195 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
196 return &ctx->q_data[V4L2_M2M_DST];
204 static int device_process(struct m2mtest_ctx *ctx,
205 struct vb2_buffer *in_vb,
206 struct vb2_buffer *out_vb)
208 struct m2mtest_dev *dev = ctx->dev;
209 struct m2mtest_q_data *q_data;
212 int tile_w, bytes_left;
213 int width, height, bytesperline;
215 q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
217 width = q_data->width;
218 height = q_data->height;
219 bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
221 p_in = vb2_plane_vaddr(in_vb, 0);
222 p_out = vb2_plane_vaddr(out_vb, 0);
223 if (!p_in || !p_out) {
224 v4l2_err(&dev->v4l2_dev,
225 "Acquiring kernel pointers to buffers failed\n");
229 if (vb2_plane_size(in_vb, 0) > vb2_plane_size(out_vb, 0)) {
230 v4l2_err(&dev->v4l2_dev, "Output buffer is too small\n");
234 tile_w = (width * (q_data[V4L2_M2M_DST].fmt->depth >> 3))
236 bytes_left = bytesperline - tile_w * MEM2MEM_NUM_TILES;
239 memcpy(&out_vb->v4l2_buf.timestamp,
240 &in_vb->v4l2_buf.timestamp,
241 sizeof(struct timeval));
244 case MEM2MEM_HFLIP | MEM2MEM_VFLIP:
245 p_out += bytesperline * height - bytes_left;
246 for (y = 0; y < height; ++y) {
247 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
249 for (x = 0; x < tile_w; ++x)
253 for (x = 0; x < tile_w; ++x)
265 for (y = 0; y < height; ++y) {
266 p_out += MEM2MEM_NUM_TILES * tile_w;
267 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
269 for (x = 0; x < tile_w; ++x)
273 for (x = 0; x < tile_w; ++x)
280 p_out += bytesperline;
285 p_out += bytesperline * (height - 1);
286 for (y = 0; y < height; ++y) {
287 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
289 for (x = 0; x < tile_w; ++x)
293 for (x = 0; x < tile_w; ++x)
300 p_out += bytes_left - 2 * bytesperline;
305 for (y = 0; y < height; ++y) {
306 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
308 for (x = 0; x < tile_w; ++x)
312 for (x = 0; x < tile_w; ++x)
326 static void schedule_irq(struct m2mtest_dev *dev, int msec_timeout)
328 dprintk(dev, "Scheduling a simulated irq\n");
329 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(msec_timeout));
337 * job_ready() - check whether an instance is ready to be scheduled to run
339 static int job_ready(void *priv)
341 struct m2mtest_ctx *ctx = priv;
343 if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen
344 || v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen) {
345 dprintk(ctx->dev, "Not enough buffers available\n");
352 static void job_abort(void *priv)
354 struct m2mtest_ctx *ctx = priv;
356 /* Will cancel the transaction in the next interrupt handler */
360 /* device_run() - prepares and starts the device
362 * This simulates all the immediate preparations required before starting
363 * a device. This will be called by the framework when it decides to schedule
364 * a particular instance.
366 static void device_run(void *priv)
368 struct m2mtest_ctx *ctx = priv;
369 struct m2mtest_dev *dev = ctx->dev;
370 struct vb2_buffer *src_buf, *dst_buf;
372 src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
373 dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
375 device_process(ctx, src_buf, dst_buf);
377 /* Run a timer, which simulates a hardware irq */
378 schedule_irq(dev, ctx->transtime);
381 static void device_isr(unsigned long priv)
383 struct m2mtest_dev *m2mtest_dev = (struct m2mtest_dev *)priv;
384 struct m2mtest_ctx *curr_ctx;
385 struct vb2_buffer *src_vb, *dst_vb;
388 curr_ctx = v4l2_m2m_get_curr_priv(m2mtest_dev->m2m_dev);
390 if (NULL == curr_ctx) {
391 pr_err("Instance released before the end of transaction\n");
395 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
396 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
398 curr_ctx->num_processed++;
400 spin_lock_irqsave(&m2mtest_dev->irqlock, flags);
401 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
402 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
403 spin_unlock_irqrestore(&m2mtest_dev->irqlock, flags);
405 if (curr_ctx->num_processed == curr_ctx->translen
406 || curr_ctx->aborting) {
407 dprintk(curr_ctx->dev, "Finishing transaction\n");
408 curr_ctx->num_processed = 0;
409 v4l2_m2m_job_finish(m2mtest_dev->m2m_dev, curr_ctx->fh.m2m_ctx);
411 device_run(curr_ctx);
418 static int vidioc_querycap(struct file *file, void *priv,
419 struct v4l2_capability *cap)
421 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
422 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
423 snprintf(cap->bus_info, sizeof(cap->bus_info),
424 "platform:%s", MEM2MEM_NAME);
425 cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
426 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
430 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
433 struct m2mtest_fmt *fmt;
437 for (i = 0; i < NUM_FORMATS; ++i) {
438 if (formats[i].types & type) {
439 /* index-th format of type type found ? */
442 /* Correct type but haven't reached our index yet,
443 * just increment per-type index */
448 if (i < NUM_FORMATS) {
451 strncpy(f->description, fmt->name, sizeof(f->description) - 1);
452 f->pixelformat = fmt->fourcc;
456 /* Format not found */
460 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
461 struct v4l2_fmtdesc *f)
463 return enum_fmt(f, MEM2MEM_CAPTURE);
466 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
467 struct v4l2_fmtdesc *f)
469 return enum_fmt(f, MEM2MEM_OUTPUT);
472 static int vidioc_g_fmt(struct m2mtest_ctx *ctx, struct v4l2_format *f)
474 struct vb2_queue *vq;
475 struct m2mtest_q_data *q_data;
477 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
481 q_data = get_q_data(ctx, f->type);
483 f->fmt.pix.width = q_data->width;
484 f->fmt.pix.height = q_data->height;
485 f->fmt.pix.field = V4L2_FIELD_NONE;
486 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
487 f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
488 f->fmt.pix.sizeimage = q_data->sizeimage;
489 f->fmt.pix.colorspace = ctx->colorspace;
494 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
495 struct v4l2_format *f)
497 return vidioc_g_fmt(file2ctx(file), f);
500 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
501 struct v4l2_format *f)
503 return vidioc_g_fmt(file2ctx(file), f);
506 static int vidioc_try_fmt(struct v4l2_format *f, struct m2mtest_fmt *fmt)
508 enum v4l2_field field;
510 field = f->fmt.pix.field;
512 if (field == V4L2_FIELD_ANY)
513 field = V4L2_FIELD_NONE;
514 else if (V4L2_FIELD_NONE != field)
517 /* V4L2 specification suggests the driver corrects the format struct
518 * if any of the dimensions is unsupported */
519 f->fmt.pix.field = field;
521 if (f->fmt.pix.height < MIN_H)
522 f->fmt.pix.height = MIN_H;
523 else if (f->fmt.pix.height > MAX_H)
524 f->fmt.pix.height = MAX_H;
526 if (f->fmt.pix.width < MIN_W)
527 f->fmt.pix.width = MIN_W;
528 else if (f->fmt.pix.width > MAX_W)
529 f->fmt.pix.width = MAX_W;
531 f->fmt.pix.width &= ~DIM_ALIGN_MASK;
532 f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
533 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
538 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
539 struct v4l2_format *f)
541 struct m2mtest_fmt *fmt;
542 struct m2mtest_ctx *ctx = file2ctx(file);
544 fmt = find_format(f);
545 if (!fmt || !(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 m2mtest_fmt *fmt;
560 struct m2mtest_ctx *ctx = file2ctx(file);
562 fmt = find_format(f);
563 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
564 v4l2_err(&ctx->dev->v4l2_dev,
565 "Fourcc format (0x%08x) invalid.\n",
566 f->fmt.pix.pixelformat);
569 if (!f->fmt.pix.colorspace)
570 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
572 return vidioc_try_fmt(f, fmt);
575 static int vidioc_s_fmt(struct m2mtest_ctx *ctx, struct v4l2_format *f)
577 struct m2mtest_q_data *q_data;
578 struct vb2_queue *vq;
580 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
584 q_data = get_q_data(ctx, f->type);
588 if (vb2_is_busy(vq)) {
589 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
593 q_data->fmt = find_format(f);
594 q_data->width = f->fmt.pix.width;
595 q_data->height = f->fmt.pix.height;
596 q_data->sizeimage = q_data->width * q_data->height
597 * q_data->fmt->depth >> 3;
600 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
601 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
606 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
607 struct v4l2_format *f)
611 ret = vidioc_try_fmt_vid_cap(file, priv, f);
615 return vidioc_s_fmt(file2ctx(file), f);
618 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
619 struct v4l2_format *f)
621 struct m2mtest_ctx *ctx = file2ctx(file);
624 ret = vidioc_try_fmt_vid_out(file, priv, f);
628 ret = vidioc_s_fmt(file2ctx(file), f);
630 ctx->colorspace = f->fmt.pix.colorspace;
634 static int m2mtest_s_ctrl(struct v4l2_ctrl *ctrl)
636 struct m2mtest_ctx *ctx =
637 container_of(ctrl->handler, struct m2mtest_ctx, hdl);
642 ctx->mode |= MEM2MEM_HFLIP;
644 ctx->mode &= ~MEM2MEM_HFLIP;
649 ctx->mode |= MEM2MEM_VFLIP;
651 ctx->mode &= ~MEM2MEM_VFLIP;
654 case V4L2_CID_TRANS_TIME_MSEC:
655 ctx->transtime = ctrl->val;
658 case V4L2_CID_TRANS_NUM_BUFS:
659 ctx->translen = ctrl->val;
663 v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
670 static const struct v4l2_ctrl_ops m2mtest_ctrl_ops = {
671 .s_ctrl = m2mtest_s_ctrl,
675 static const struct v4l2_ioctl_ops m2mtest_ioctl_ops = {
676 .vidioc_querycap = vidioc_querycap,
678 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
679 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
680 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
681 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
683 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
684 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
685 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
686 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
688 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
689 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
690 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
691 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
693 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
694 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
696 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
697 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
705 static int m2mtest_queue_setup(struct vb2_queue *vq,
706 const struct v4l2_format *fmt,
707 unsigned int *nbuffers, unsigned int *nplanes,
708 unsigned int sizes[], void *alloc_ctxs[])
710 struct m2mtest_ctx *ctx = vb2_get_drv_priv(vq);
711 struct m2mtest_q_data *q_data;
712 unsigned int size, count = *nbuffers;
714 q_data = get_q_data(ctx, vq->type);
716 size = q_data->width * q_data->height * q_data->fmt->depth >> 3;
718 while (size * count > MEM2MEM_VID_MEM_LIMIT)
726 * videobuf2-vmalloc allocator is context-less so no need to set
730 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
735 static int m2mtest_buf_prepare(struct vb2_buffer *vb)
737 struct m2mtest_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
738 struct m2mtest_q_data *q_data;
740 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
742 q_data = get_q_data(ctx, vb->vb2_queue->type);
744 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
745 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
746 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
750 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
755 static void m2mtest_buf_queue(struct vb2_buffer *vb)
757 struct m2mtest_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
758 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vb);
761 static struct vb2_ops m2mtest_qops = {
762 .queue_setup = m2mtest_queue_setup,
763 .buf_prepare = m2mtest_buf_prepare,
764 .buf_queue = m2mtest_buf_queue,
765 .wait_prepare = vb2_ops_wait_prepare,
766 .wait_finish = vb2_ops_wait_finish,
769 static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
771 struct m2mtest_ctx *ctx = priv;
774 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
775 src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
776 src_vq->drv_priv = ctx;
777 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
778 src_vq->ops = &m2mtest_qops;
779 src_vq->mem_ops = &vb2_vmalloc_memops;
780 src_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
781 src_vq->lock = &ctx->dev->dev_mutex;
783 ret = vb2_queue_init(src_vq);
787 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
788 dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
789 dst_vq->drv_priv = ctx;
790 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
791 dst_vq->ops = &m2mtest_qops;
792 dst_vq->mem_ops = &vb2_vmalloc_memops;
793 dst_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
794 dst_vq->lock = &ctx->dev->dev_mutex;
796 return vb2_queue_init(dst_vq);
799 static const struct v4l2_ctrl_config m2mtest_ctrl_trans_time_msec = {
800 .ops = &m2mtest_ctrl_ops,
801 .id = V4L2_CID_TRANS_TIME_MSEC,
802 .name = "Transaction Time (msec)",
803 .type = V4L2_CTRL_TYPE_INTEGER,
810 static const struct v4l2_ctrl_config m2mtest_ctrl_trans_num_bufs = {
811 .ops = &m2mtest_ctrl_ops,
812 .id = V4L2_CID_TRANS_NUM_BUFS,
813 .name = "Buffers Per Transaction",
814 .type = V4L2_CTRL_TYPE_INTEGER,
817 .max = MEM2MEM_DEF_NUM_BUFS,
824 static int m2mtest_open(struct file *file)
826 struct m2mtest_dev *dev = video_drvdata(file);
827 struct m2mtest_ctx *ctx = NULL;
828 struct v4l2_ctrl_handler *hdl;
831 if (mutex_lock_interruptible(&dev->dev_mutex))
833 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
839 v4l2_fh_init(&ctx->fh, video_devdata(file));
840 file->private_data = &ctx->fh;
843 v4l2_ctrl_handler_init(hdl, 4);
844 v4l2_ctrl_new_std(hdl, &m2mtest_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
845 v4l2_ctrl_new_std(hdl, &m2mtest_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
846 v4l2_ctrl_new_custom(hdl, &m2mtest_ctrl_trans_time_msec, NULL);
847 v4l2_ctrl_new_custom(hdl, &m2mtest_ctrl_trans_num_bufs, NULL);
850 v4l2_ctrl_handler_free(hdl);
853 ctx->fh.ctrl_handler = hdl;
854 v4l2_ctrl_handler_setup(hdl);
856 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[0];
857 ctx->q_data[V4L2_M2M_SRC].width = 640;
858 ctx->q_data[V4L2_M2M_SRC].height = 480;
859 ctx->q_data[V4L2_M2M_SRC].sizeimage =
860 ctx->q_data[V4L2_M2M_SRC].width *
861 ctx->q_data[V4L2_M2M_SRC].height *
862 (ctx->q_data[V4L2_M2M_SRC].fmt->depth >> 3);
863 ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC];
864 ctx->colorspace = V4L2_COLORSPACE_REC709;
866 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
868 if (IS_ERR(ctx->fh.m2m_ctx)) {
869 rc = PTR_ERR(ctx->fh.m2m_ctx);
871 v4l2_ctrl_handler_free(hdl);
876 v4l2_fh_add(&ctx->fh);
877 atomic_inc(&dev->num_inst);
879 dprintk(dev, "Created instance: %p, m2m_ctx: %p\n",
880 ctx, ctx->fh.m2m_ctx);
883 mutex_unlock(&dev->dev_mutex);
887 static int m2mtest_release(struct file *file)
889 struct m2mtest_dev *dev = video_drvdata(file);
890 struct m2mtest_ctx *ctx = file2ctx(file);
892 dprintk(dev, "Releasing instance %p\n", ctx);
894 v4l2_fh_del(&ctx->fh);
895 v4l2_fh_exit(&ctx->fh);
896 v4l2_ctrl_handler_free(&ctx->hdl);
897 mutex_lock(&dev->dev_mutex);
898 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
899 mutex_unlock(&dev->dev_mutex);
902 atomic_dec(&dev->num_inst);
907 static const struct v4l2_file_operations m2mtest_fops = {
908 .owner = THIS_MODULE,
909 .open = m2mtest_open,
910 .release = m2mtest_release,
911 .poll = v4l2_m2m_fop_poll,
912 .unlocked_ioctl = video_ioctl2,
913 .mmap = v4l2_m2m_fop_mmap,
916 static struct video_device m2mtest_videodev = {
917 .name = MEM2MEM_NAME,
918 .vfl_dir = VFL_DIR_M2M,
919 .fops = &m2mtest_fops,
920 .ioctl_ops = &m2mtest_ioctl_ops,
922 .release = video_device_release,
925 static struct v4l2_m2m_ops m2m_ops = {
926 .device_run = device_run,
927 .job_ready = job_ready,
928 .job_abort = job_abort,
931 static int m2mtest_probe(struct platform_device *pdev)
933 struct m2mtest_dev *dev;
934 struct video_device *vfd;
937 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
941 spin_lock_init(&dev->irqlock);
943 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
947 atomic_set(&dev->num_inst, 0);
948 mutex_init(&dev->dev_mutex);
950 vfd = video_device_alloc();
952 v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
957 *vfd = m2mtest_videodev;
958 vfd->lock = &dev->dev_mutex;
959 vfd->v4l2_dev = &dev->v4l2_dev;
961 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
963 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
967 video_set_drvdata(vfd, dev);
968 snprintf(vfd->name, sizeof(vfd->name), "%s", m2mtest_videodev.name);
970 v4l2_info(&dev->v4l2_dev,
971 "Device registered as /dev/video%d\n", vfd->num);
973 setup_timer(&dev->timer, device_isr, (long)dev);
974 platform_set_drvdata(pdev, dev);
976 dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
977 if (IS_ERR(dev->m2m_dev)) {
978 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
979 ret = PTR_ERR(dev->m2m_dev);
986 v4l2_m2m_release(dev->m2m_dev);
987 video_unregister_device(dev->vfd);
989 video_device_release(vfd);
991 v4l2_device_unregister(&dev->v4l2_dev);
996 static int m2mtest_remove(struct platform_device *pdev)
998 struct m2mtest_dev *dev = platform_get_drvdata(pdev);
1000 v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
1001 v4l2_m2m_release(dev->m2m_dev);
1002 del_timer_sync(&dev->timer);
1003 video_unregister_device(dev->vfd);
1004 v4l2_device_unregister(&dev->v4l2_dev);
1009 static struct platform_driver m2mtest_pdrv = {
1010 .probe = m2mtest_probe,
1011 .remove = m2mtest_remove,
1013 .name = MEM2MEM_NAME,
1014 .owner = THIS_MODULE,
1018 static void __exit m2mtest_exit(void)
1020 platform_driver_unregister(&m2mtest_pdrv);
1021 platform_device_unregister(&m2mtest_pdev);
1024 static int __init m2mtest_init(void)
1028 ret = platform_device_register(&m2mtest_pdev);
1032 ret = platform_driver_register(&m2mtest_pdrv);
1034 platform_device_unregister(&m2mtest_pdev);
1039 module_init(m2mtest_init);
1040 module_exit(m2mtest_exit);