FRV: Use generic show_interrupts()
[cris-mirror.git] / drivers / media / video / mem2mem_testdev.c
blobb03d74e09a3c1083f226942e7b82f708797a38fc
1 /*
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>
21 #include <linux/fs.h>
22 #include <linux/version.h>
23 #include <linux/timer.h>
24 #include <linux/sched.h>
25 #include <linux/slab.h>
27 #include <linux/platform_device.h>
28 #include <media/v4l2-mem2mem.h>
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-ioctl.h>
31 #include <media/videobuf2-vmalloc.h>
33 #define MEM2MEM_TEST_MODULE_NAME "mem2mem-testdev"
35 MODULE_DESCRIPTION("Virtual device for mem2mem framework testing");
36 MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>");
37 MODULE_LICENSE("GPL");
40 #define MIN_W 32
41 #define MIN_H 32
42 #define MAX_W 640
43 #define MAX_H 480
44 #define DIM_ALIGN_MASK 0x08 /* 8-alignment for dimensions */
46 /* Flags that indicate a format can be used for capture/output */
47 #define MEM2MEM_CAPTURE (1 << 0)
48 #define MEM2MEM_OUTPUT (1 << 1)
50 #define MEM2MEM_NAME "m2m-testdev"
52 /* Per queue */
53 #define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME
54 /* In bytes, per queue */
55 #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024)
57 /* Default transaction time in msec */
58 #define MEM2MEM_DEF_TRANSTIME 1000
59 /* Default number of buffers per transaction */
60 #define MEM2MEM_DEF_TRANSLEN 1
61 #define MEM2MEM_COLOR_STEP (0xff >> 4)
62 #define MEM2MEM_NUM_TILES 8
64 #define dprintk(dev, fmt, arg...) \
65 v4l2_dbg(1, 1, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
68 void m2mtest_dev_release(struct device *dev)
71 static struct platform_device m2mtest_pdev = {
72 .name = MEM2MEM_NAME,
73 .dev.release = m2mtest_dev_release,
76 struct m2mtest_fmt {
77 char *name;
78 u32 fourcc;
79 int depth;
80 /* Types the format can be used for */
81 u32 types;
84 static struct m2mtest_fmt formats[] = {
86 .name = "RGB565 (BE)",
87 .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
88 .depth = 16,
89 /* Both capture and output format */
90 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
93 .name = "4:2:2, packed, YUYV",
94 .fourcc = V4L2_PIX_FMT_YUYV,
95 .depth = 16,
96 /* Output-only format */
97 .types = MEM2MEM_OUTPUT,
101 /* Per-queue, driver-specific private data */
102 struct m2mtest_q_data {
103 unsigned int width;
104 unsigned int height;
105 unsigned int sizeimage;
106 struct m2mtest_fmt *fmt;
109 enum {
110 V4L2_M2M_SRC = 0,
111 V4L2_M2M_DST = 1,
114 /* Source and destination queue data */
115 static struct m2mtest_q_data q_data[2];
117 static struct m2mtest_q_data *get_q_data(enum v4l2_buf_type type)
119 switch (type) {
120 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
121 return &q_data[V4L2_M2M_SRC];
122 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
123 return &q_data[V4L2_M2M_DST];
124 default:
125 BUG();
127 return NULL;
130 #define V4L2_CID_TRANS_TIME_MSEC V4L2_CID_PRIVATE_BASE
131 #define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_PRIVATE_BASE + 1)
133 static struct v4l2_queryctrl m2mtest_ctrls[] = {
135 .id = V4L2_CID_TRANS_TIME_MSEC,
136 .type = V4L2_CTRL_TYPE_INTEGER,
137 .name = "Transaction time (msec)",
138 .minimum = 1,
139 .maximum = 10000,
140 .step = 100,
141 .default_value = 1000,
142 .flags = 0,
143 }, {
144 .id = V4L2_CID_TRANS_NUM_BUFS,
145 .type = V4L2_CTRL_TYPE_INTEGER,
146 .name = "Buffers per transaction",
147 .minimum = 1,
148 .maximum = MEM2MEM_DEF_NUM_BUFS,
149 .step = 1,
150 .default_value = 1,
151 .flags = 0,
155 #define NUM_FORMATS ARRAY_SIZE(formats)
157 static struct m2mtest_fmt *find_format(struct v4l2_format *f)
159 struct m2mtest_fmt *fmt;
160 unsigned int k;
162 for (k = 0; k < NUM_FORMATS; k++) {
163 fmt = &formats[k];
164 if (fmt->fourcc == f->fmt.pix.pixelformat)
165 break;
168 if (k == NUM_FORMATS)
169 return NULL;
171 return &formats[k];
174 struct m2mtest_dev {
175 struct v4l2_device v4l2_dev;
176 struct video_device *vfd;
178 atomic_t num_inst;
179 struct mutex dev_mutex;
180 spinlock_t irqlock;
182 struct timer_list timer;
184 struct v4l2_m2m_dev *m2m_dev;
187 struct m2mtest_ctx {
188 struct m2mtest_dev *dev;
190 /* Processed buffers in this transaction */
191 u8 num_processed;
193 /* Transaction length (i.e. how many buffers per transaction) */
194 u32 translen;
195 /* Transaction time (i.e. simulated processing time) in milliseconds */
196 u32 transtime;
198 /* Abort requested by m2m */
199 int aborting;
201 struct v4l2_m2m_ctx *m2m_ctx;
204 static struct v4l2_queryctrl *get_ctrl(int id)
206 int i;
208 for (i = 0; i < ARRAY_SIZE(m2mtest_ctrls); ++i) {
209 if (id == m2mtest_ctrls[i].id)
210 return &m2mtest_ctrls[i];
213 return NULL;
216 static int device_process(struct m2mtest_ctx *ctx,
217 struct vb2_buffer *in_vb,
218 struct vb2_buffer *out_vb)
220 struct m2mtest_dev *dev = ctx->dev;
221 struct m2mtest_q_data *q_data;
222 u8 *p_in, *p_out;
223 int x, y, t, w;
224 int tile_w, bytes_left;
225 int width, height, bytesperline;
227 q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
229 width = q_data->width;
230 height = q_data->height;
231 bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
233 p_in = vb2_plane_vaddr(in_vb, 0);
234 p_out = vb2_plane_vaddr(out_vb, 0);
235 if (!p_in || !p_out) {
236 v4l2_err(&dev->v4l2_dev,
237 "Acquiring kernel pointers to buffers failed\n");
238 return -EFAULT;
241 if (vb2_plane_size(in_vb, 0) > vb2_plane_size(out_vb, 0)) {
242 v4l2_err(&dev->v4l2_dev, "Output buffer is too small\n");
243 return -EINVAL;
246 tile_w = (width * (q_data[V4L2_M2M_DST].fmt->depth >> 3))
247 / MEM2MEM_NUM_TILES;
248 bytes_left = bytesperline - tile_w * MEM2MEM_NUM_TILES;
249 w = 0;
251 for (y = 0; y < height; ++y) {
252 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
253 if (w & 0x1) {
254 for (x = 0; x < tile_w; ++x)
255 *p_out++ = *p_in++ + MEM2MEM_COLOR_STEP;
256 } else {
257 for (x = 0; x < tile_w; ++x)
258 *p_out++ = *p_in++ - MEM2MEM_COLOR_STEP;
260 ++w;
262 p_in += bytes_left;
263 p_out += bytes_left;
266 return 0;
269 static void schedule_irq(struct m2mtest_dev *dev, int msec_timeout)
271 dprintk(dev, "Scheduling a simulated irq\n");
272 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(msec_timeout));
276 * mem2mem callbacks
280 * job_ready() - check whether an instance is ready to be scheduled to run
282 static int job_ready(void *priv)
284 struct m2mtest_ctx *ctx = priv;
286 if (v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) < ctx->translen
287 || v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) < ctx->translen) {
288 dprintk(ctx->dev, "Not enough buffers available\n");
289 return 0;
292 return 1;
295 static void job_abort(void *priv)
297 struct m2mtest_ctx *ctx = priv;
299 /* Will cancel the transaction in the next interrupt handler */
300 ctx->aborting = 1;
303 static void m2mtest_lock(void *priv)
305 struct m2mtest_ctx *ctx = priv;
306 struct m2mtest_dev *dev = ctx->dev;
307 mutex_lock(&dev->dev_mutex);
310 static void m2mtest_unlock(void *priv)
312 struct m2mtest_ctx *ctx = priv;
313 struct m2mtest_dev *dev = ctx->dev;
314 mutex_unlock(&dev->dev_mutex);
318 /* device_run() - prepares and starts the device
320 * This simulates all the immediate preparations required before starting
321 * a device. This will be called by the framework when it decides to schedule
322 * a particular instance.
324 static void device_run(void *priv)
326 struct m2mtest_ctx *ctx = priv;
327 struct m2mtest_dev *dev = ctx->dev;
328 struct vb2_buffer *src_buf, *dst_buf;
330 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
331 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
333 device_process(ctx, src_buf, dst_buf);
335 /* Run a timer, which simulates a hardware irq */
336 schedule_irq(dev, ctx->transtime);
339 static void device_isr(unsigned long priv)
341 struct m2mtest_dev *m2mtest_dev = (struct m2mtest_dev *)priv;
342 struct m2mtest_ctx *curr_ctx;
343 struct vb2_buffer *src_vb, *dst_vb;
344 unsigned long flags;
346 curr_ctx = v4l2_m2m_get_curr_priv(m2mtest_dev->m2m_dev);
348 if (NULL == curr_ctx) {
349 printk(KERN_ERR
350 "Instance released before the end of transaction\n");
351 return;
354 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
355 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
357 curr_ctx->num_processed++;
359 spin_lock_irqsave(&m2mtest_dev->irqlock, flags);
360 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
361 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
362 spin_unlock_irqrestore(&m2mtest_dev->irqlock, flags);
364 if (curr_ctx->num_processed == curr_ctx->translen
365 || curr_ctx->aborting) {
366 dprintk(curr_ctx->dev, "Finishing transaction\n");
367 curr_ctx->num_processed = 0;
368 v4l2_m2m_job_finish(m2mtest_dev->m2m_dev, curr_ctx->m2m_ctx);
369 } else {
370 device_run(curr_ctx);
375 * video ioctls
377 static int vidioc_querycap(struct file *file, void *priv,
378 struct v4l2_capability *cap)
380 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
381 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
382 cap->bus_info[0] = 0;
383 cap->version = KERNEL_VERSION(0, 1, 0);
384 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
385 | V4L2_CAP_STREAMING;
387 return 0;
390 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
392 int i, num;
393 struct m2mtest_fmt *fmt;
395 num = 0;
397 for (i = 0; i < NUM_FORMATS; ++i) {
398 if (formats[i].types & type) {
399 /* index-th format of type type found ? */
400 if (num == f->index)
401 break;
402 /* Correct type but haven't reached our index yet,
403 * just increment per-type index */
404 ++num;
408 if (i < NUM_FORMATS) {
409 /* Format found */
410 fmt = &formats[i];
411 strncpy(f->description, fmt->name, sizeof(f->description) - 1);
412 f->pixelformat = fmt->fourcc;
413 return 0;
416 /* Format not found */
417 return -EINVAL;
420 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
421 struct v4l2_fmtdesc *f)
423 return enum_fmt(f, MEM2MEM_CAPTURE);
426 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
427 struct v4l2_fmtdesc *f)
429 return enum_fmt(f, MEM2MEM_OUTPUT);
432 static int vidioc_g_fmt(struct m2mtest_ctx *ctx, struct v4l2_format *f)
434 struct vb2_queue *vq;
435 struct m2mtest_q_data *q_data;
437 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
438 if (!vq)
439 return -EINVAL;
441 q_data = get_q_data(f->type);
443 f->fmt.pix.width = q_data->width;
444 f->fmt.pix.height = q_data->height;
445 f->fmt.pix.field = V4L2_FIELD_NONE;
446 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
447 f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
448 f->fmt.pix.sizeimage = q_data->sizeimage;
450 return 0;
453 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
454 struct v4l2_format *f)
456 return vidioc_g_fmt(priv, f);
459 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
460 struct v4l2_format *f)
462 return vidioc_g_fmt(priv, f);
465 static int vidioc_try_fmt(struct v4l2_format *f, struct m2mtest_fmt *fmt)
467 enum v4l2_field field;
469 field = f->fmt.pix.field;
471 if (field == V4L2_FIELD_ANY)
472 field = V4L2_FIELD_NONE;
473 else if (V4L2_FIELD_NONE != field)
474 return -EINVAL;
476 /* V4L2 specification suggests the driver corrects the format struct
477 * if any of the dimensions is unsupported */
478 f->fmt.pix.field = field;
480 if (f->fmt.pix.height < MIN_H)
481 f->fmt.pix.height = MIN_H;
482 else if (f->fmt.pix.height > MAX_H)
483 f->fmt.pix.height = MAX_H;
485 if (f->fmt.pix.width < MIN_W)
486 f->fmt.pix.width = MIN_W;
487 else if (f->fmt.pix.width > MAX_W)
488 f->fmt.pix.width = MAX_W;
490 f->fmt.pix.width &= ~DIM_ALIGN_MASK;
491 f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
492 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
494 return 0;
497 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
498 struct v4l2_format *f)
500 struct m2mtest_fmt *fmt;
501 struct m2mtest_ctx *ctx = priv;
503 fmt = find_format(f);
504 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
505 v4l2_err(&ctx->dev->v4l2_dev,
506 "Fourcc format (0x%08x) invalid.\n",
507 f->fmt.pix.pixelformat);
508 return -EINVAL;
511 return vidioc_try_fmt(f, fmt);
514 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
515 struct v4l2_format *f)
517 struct m2mtest_fmt *fmt;
518 struct m2mtest_ctx *ctx = priv;
520 fmt = find_format(f);
521 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
522 v4l2_err(&ctx->dev->v4l2_dev,
523 "Fourcc format (0x%08x) invalid.\n",
524 f->fmt.pix.pixelformat);
525 return -EINVAL;
528 return vidioc_try_fmt(f, fmt);
531 static int vidioc_s_fmt(struct m2mtest_ctx *ctx, struct v4l2_format *f)
533 struct m2mtest_q_data *q_data;
534 struct vb2_queue *vq;
536 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
537 if (!vq)
538 return -EINVAL;
540 q_data = get_q_data(f->type);
541 if (!q_data)
542 return -EINVAL;
544 if (vb2_is_busy(vq)) {
545 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
546 return -EBUSY;
549 q_data->fmt = find_format(f);
550 q_data->width = f->fmt.pix.width;
551 q_data->height = f->fmt.pix.height;
552 q_data->sizeimage = q_data->width * q_data->height
553 * q_data->fmt->depth >> 3;
555 dprintk(ctx->dev,
556 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
557 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
559 return 0;
562 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
563 struct v4l2_format *f)
565 int ret;
567 ret = vidioc_try_fmt_vid_cap(file, priv, f);
568 if (ret)
569 return ret;
571 return vidioc_s_fmt(priv, f);
574 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
575 struct v4l2_format *f)
577 int ret;
579 ret = vidioc_try_fmt_vid_out(file, priv, f);
580 if (ret)
581 return ret;
583 return vidioc_s_fmt(priv, f);
586 static int vidioc_reqbufs(struct file *file, void *priv,
587 struct v4l2_requestbuffers *reqbufs)
589 struct m2mtest_ctx *ctx = priv;
591 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
594 static int vidioc_querybuf(struct file *file, void *priv,
595 struct v4l2_buffer *buf)
597 struct m2mtest_ctx *ctx = priv;
599 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
602 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
604 struct m2mtest_ctx *ctx = priv;
606 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
609 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
611 struct m2mtest_ctx *ctx = priv;
613 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
616 static int vidioc_streamon(struct file *file, void *priv,
617 enum v4l2_buf_type type)
619 struct m2mtest_ctx *ctx = priv;
621 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
624 static int vidioc_streamoff(struct file *file, void *priv,
625 enum v4l2_buf_type type)
627 struct m2mtest_ctx *ctx = priv;
629 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
632 static int vidioc_queryctrl(struct file *file, void *priv,
633 struct v4l2_queryctrl *qc)
635 struct v4l2_queryctrl *c;
637 c = get_ctrl(qc->id);
638 if (!c)
639 return -EINVAL;
641 *qc = *c;
642 return 0;
645 static int vidioc_g_ctrl(struct file *file, void *priv,
646 struct v4l2_control *ctrl)
648 struct m2mtest_ctx *ctx = priv;
650 switch (ctrl->id) {
651 case V4L2_CID_TRANS_TIME_MSEC:
652 ctrl->value = ctx->transtime;
653 break;
655 case V4L2_CID_TRANS_NUM_BUFS:
656 ctrl->value = ctx->translen;
657 break;
659 default:
660 v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
661 return -EINVAL;
664 return 0;
667 static int check_ctrl_val(struct m2mtest_ctx *ctx, struct v4l2_control *ctrl)
669 struct v4l2_queryctrl *c;
671 c = get_ctrl(ctrl->id);
672 if (!c)
673 return -EINVAL;
675 if (ctrl->value < c->minimum || ctrl->value > c->maximum) {
676 v4l2_err(&ctx->dev->v4l2_dev, "Value out of range\n");
677 return -ERANGE;
680 return 0;
683 static int vidioc_s_ctrl(struct file *file, void *priv,
684 struct v4l2_control *ctrl)
686 struct m2mtest_ctx *ctx = priv;
687 int ret = 0;
689 ret = check_ctrl_val(ctx, ctrl);
690 if (ret != 0)
691 return ret;
693 switch (ctrl->id) {
694 case V4L2_CID_TRANS_TIME_MSEC:
695 ctx->transtime = ctrl->value;
696 break;
698 case V4L2_CID_TRANS_NUM_BUFS:
699 ctx->translen = ctrl->value;
700 break;
702 default:
703 v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
704 return -EINVAL;
707 return 0;
711 static const struct v4l2_ioctl_ops m2mtest_ioctl_ops = {
712 .vidioc_querycap = vidioc_querycap,
714 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
715 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
716 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
717 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
719 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
720 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
721 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
722 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
724 .vidioc_reqbufs = vidioc_reqbufs,
725 .vidioc_querybuf = vidioc_querybuf,
727 .vidioc_qbuf = vidioc_qbuf,
728 .vidioc_dqbuf = vidioc_dqbuf,
730 .vidioc_streamon = vidioc_streamon,
731 .vidioc_streamoff = vidioc_streamoff,
733 .vidioc_queryctrl = vidioc_queryctrl,
734 .vidioc_g_ctrl = vidioc_g_ctrl,
735 .vidioc_s_ctrl = vidioc_s_ctrl,
740 * Queue operations
743 static int m2mtest_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
744 unsigned int *nplanes, unsigned long sizes[],
745 void *alloc_ctxs[])
747 struct m2mtest_ctx *ctx = vb2_get_drv_priv(vq);
748 struct m2mtest_q_data *q_data;
749 unsigned int size, count = *nbuffers;
751 q_data = get_q_data(vq->type);
753 size = q_data->width * q_data->height * q_data->fmt->depth >> 3;
755 while (size * count > MEM2MEM_VID_MEM_LIMIT)
756 (count)--;
758 *nplanes = 1;
759 *nbuffers = count;
760 sizes[0] = size;
763 * videobuf2-vmalloc allocator is context-less so no need to set
764 * alloc_ctxs array.
767 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
769 return 0;
772 static int m2mtest_buf_prepare(struct vb2_buffer *vb)
774 struct m2mtest_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
775 struct m2mtest_q_data *q_data;
777 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
779 q_data = get_q_data(vb->vb2_queue->type);
781 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
782 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
783 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
784 return -EINVAL;
787 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
789 return 0;
792 static void m2mtest_buf_queue(struct vb2_buffer *vb)
794 struct m2mtest_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
795 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
798 static struct vb2_ops m2mtest_qops = {
799 .queue_setup = m2mtest_queue_setup,
800 .buf_prepare = m2mtest_buf_prepare,
801 .buf_queue = m2mtest_buf_queue,
804 static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
806 struct m2mtest_ctx *ctx = priv;
807 int ret;
809 memset(src_vq, 0, sizeof(*src_vq));
810 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
811 src_vq->io_modes = VB2_MMAP;
812 src_vq->drv_priv = ctx;
813 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
814 src_vq->ops = &m2mtest_qops;
815 src_vq->mem_ops = &vb2_vmalloc_memops;
817 ret = vb2_queue_init(src_vq);
818 if (ret)
819 return ret;
821 memset(dst_vq, 0, sizeof(*dst_vq));
822 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
823 dst_vq->io_modes = VB2_MMAP;
824 dst_vq->drv_priv = ctx;
825 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
826 dst_vq->ops = &m2mtest_qops;
827 dst_vq->mem_ops = &vb2_vmalloc_memops;
829 return vb2_queue_init(dst_vq);
833 * File operations
835 static int m2mtest_open(struct file *file)
837 struct m2mtest_dev *dev = video_drvdata(file);
838 struct m2mtest_ctx *ctx = NULL;
840 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
841 if (!ctx)
842 return -ENOMEM;
844 file->private_data = ctx;
845 ctx->dev = dev;
846 ctx->translen = MEM2MEM_DEF_TRANSLEN;
847 ctx->transtime = MEM2MEM_DEF_TRANSTIME;
848 ctx->num_processed = 0;
850 ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
852 if (IS_ERR(ctx->m2m_ctx)) {
853 int ret = PTR_ERR(ctx->m2m_ctx);
855 kfree(ctx);
856 return ret;
859 atomic_inc(&dev->num_inst);
861 dprintk(dev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
863 return 0;
866 static int m2mtest_release(struct file *file)
868 struct m2mtest_dev *dev = video_drvdata(file);
869 struct m2mtest_ctx *ctx = file->private_data;
871 dprintk(dev, "Releasing instance %p\n", ctx);
873 v4l2_m2m_ctx_release(ctx->m2m_ctx);
874 kfree(ctx);
876 atomic_dec(&dev->num_inst);
878 return 0;
881 static unsigned int m2mtest_poll(struct file *file,
882 struct poll_table_struct *wait)
884 struct m2mtest_ctx *ctx = file->private_data;
886 return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
889 static int m2mtest_mmap(struct file *file, struct vm_area_struct *vma)
891 struct m2mtest_ctx *ctx = file->private_data;
893 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
896 static const struct v4l2_file_operations m2mtest_fops = {
897 .owner = THIS_MODULE,
898 .open = m2mtest_open,
899 .release = m2mtest_release,
900 .poll = m2mtest_poll,
901 .unlocked_ioctl = video_ioctl2,
902 .mmap = m2mtest_mmap,
905 static struct video_device m2mtest_videodev = {
906 .name = MEM2MEM_NAME,
907 .fops = &m2mtest_fops,
908 .ioctl_ops = &m2mtest_ioctl_ops,
909 .minor = -1,
910 .release = video_device_release,
913 static struct v4l2_m2m_ops m2m_ops = {
914 .device_run = device_run,
915 .job_ready = job_ready,
916 .job_abort = job_abort,
917 .lock = m2mtest_lock,
918 .unlock = m2mtest_unlock,
921 static int m2mtest_probe(struct platform_device *pdev)
923 struct m2mtest_dev *dev;
924 struct video_device *vfd;
925 int ret;
927 dev = kzalloc(sizeof *dev, GFP_KERNEL);
928 if (!dev)
929 return -ENOMEM;
931 spin_lock_init(&dev->irqlock);
933 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
934 if (ret)
935 goto free_dev;
937 atomic_set(&dev->num_inst, 0);
938 mutex_init(&dev->dev_mutex);
940 vfd = video_device_alloc();
941 if (!vfd) {
942 v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
943 ret = -ENOMEM;
944 goto unreg_dev;
947 *vfd = m2mtest_videodev;
948 vfd->lock = &dev->dev_mutex;
950 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
951 if (ret) {
952 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
953 goto rel_vdev;
956 video_set_drvdata(vfd, dev);
957 snprintf(vfd->name, sizeof(vfd->name), "%s", m2mtest_videodev.name);
958 dev->vfd = vfd;
959 v4l2_info(&dev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
960 "Device registered as /dev/video%d\n", vfd->num);
962 setup_timer(&dev->timer, device_isr, (long)dev);
963 platform_set_drvdata(pdev, dev);
965 dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
966 if (IS_ERR(dev->m2m_dev)) {
967 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
968 ret = PTR_ERR(dev->m2m_dev);
969 goto err_m2m;
972 q_data[V4L2_M2M_SRC].fmt = &formats[0];
973 q_data[V4L2_M2M_DST].fmt = &formats[0];
975 return 0;
977 v4l2_m2m_release(dev->m2m_dev);
978 err_m2m:
979 video_unregister_device(dev->vfd);
980 rel_vdev:
981 video_device_release(vfd);
982 unreg_dev:
983 v4l2_device_unregister(&dev->v4l2_dev);
984 free_dev:
985 kfree(dev);
987 return ret;
990 static int m2mtest_remove(struct platform_device *pdev)
992 struct m2mtest_dev *dev =
993 (struct m2mtest_dev *)platform_get_drvdata(pdev);
995 v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
996 v4l2_m2m_release(dev->m2m_dev);
997 del_timer_sync(&dev->timer);
998 video_unregister_device(dev->vfd);
999 v4l2_device_unregister(&dev->v4l2_dev);
1000 kfree(dev);
1002 return 0;
1005 static struct platform_driver m2mtest_pdrv = {
1006 .probe = m2mtest_probe,
1007 .remove = m2mtest_remove,
1008 .driver = {
1009 .name = MEM2MEM_NAME,
1010 .owner = THIS_MODULE,
1014 static void __exit m2mtest_exit(void)
1016 platform_driver_unregister(&m2mtest_pdrv);
1017 platform_device_unregister(&m2mtest_pdev);
1020 static int __init m2mtest_init(void)
1022 int ret;
1024 ret = platform_device_register(&m2mtest_pdev);
1025 if (ret)
1026 return ret;
1028 ret = platform_driver_register(&m2mtest_pdrv);
1029 if (ret)
1030 platform_device_unregister(&m2mtest_pdev);
1032 return 0;
1035 module_init(m2mtest_init);
1036 module_exit(m2mtest_exit);