2 * V4L2 deinterlacing support.
4 * Copyright (c) 2012 Vista Silicon S.L.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the
10 * License, or (at your option) any later version
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/interrupt.h>
16 #include <linux/dmaengine.h>
17 #include <linux/platform_device.h>
19 #include <media/v4l2-mem2mem.h>
20 #include <media/v4l2-device.h>
21 #include <media/v4l2-ioctl.h>
22 #include <media/videobuf2-dma-contig.h>
24 #define MEM2MEM_TEST_MODULE_NAME "mem2mem-deinterlace"
26 MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine");
28 MODULE_LICENSE("GPL");
29 MODULE_VERSION("0.0.1");
32 module_param(debug, bool, 0644);
34 /* Flags that indicate a format can be used for capture/output */
35 #define MEM2MEM_CAPTURE (1 << 0)
36 #define MEM2MEM_OUTPUT (1 << 1)
38 #define MEM2MEM_NAME "m2m-deinterlace"
40 #define dprintk(dev, fmt, arg...) \
41 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
43 struct deinterlace_fmt {
46 /* Types the format can be used for */
50 static struct deinterlace_fmt formats[] = {
52 .name = "YUV 4:2:0 Planar",
53 .fourcc = V4L2_PIX_FMT_YUV420,
54 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
58 .fourcc = V4L2_PIX_FMT_YUYV,
59 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
63 #define NUM_FORMATS ARRAY_SIZE(formats)
65 /* Per-queue, driver-specific private data */
66 struct deinterlace_q_data {
69 unsigned int sizeimage;
70 struct deinterlace_fmt *fmt;
71 enum v4l2_field field;
86 YUV420_DMA_Y_ODD_DOUBLING,
87 YUV420_DMA_U_ODD_DOUBLING,
88 YUV420_DMA_V_ODD_DOUBLING,
91 YUYV_DMA_EVEN_DOUBLING,
94 /* Source and destination queue data */
95 static struct deinterlace_q_data q_data[2];
97 static struct deinterlace_q_data *get_q_data(enum v4l2_buf_type type)
100 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
101 return &q_data[V4L2_M2M_SRC];
102 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
103 return &q_data[V4L2_M2M_DST];
110 static struct deinterlace_fmt *find_format(struct v4l2_format *f)
112 struct deinterlace_fmt *fmt;
115 for (k = 0; k < NUM_FORMATS; k++) {
117 if ((fmt->types & f->type) &&
118 (fmt->fourcc == f->fmt.pix.pixelformat))
122 if (k == NUM_FORMATS)
128 struct deinterlace_dev {
129 struct v4l2_device v4l2_dev;
130 struct video_device *vfd;
133 struct mutex dev_mutex;
136 struct dma_chan *dma_chan;
138 struct v4l2_m2m_dev *m2m_dev;
139 struct vb2_alloc_ctx *alloc_ctx;
142 struct deinterlace_ctx {
143 struct deinterlace_dev *dev;
145 /* Abort requested by m2m */
147 enum v4l2_colorspace colorspace;
149 struct v4l2_m2m_ctx *m2m_ctx;
150 struct dma_interleaved_template *xt;
156 static int deinterlace_job_ready(void *priv)
158 struct deinterlace_ctx *ctx = priv;
159 struct deinterlace_dev *pcdev = ctx->dev;
161 if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0)
162 && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0)
163 && (atomic_read(&ctx->dev->busy) == 0)) {
164 dprintk(pcdev, "Task ready\n");
168 dprintk(pcdev, "Task not ready to run\n");
173 static void deinterlace_job_abort(void *priv)
175 struct deinterlace_ctx *ctx = priv;
176 struct deinterlace_dev *pcdev = ctx->dev;
180 dprintk(pcdev, "Aborting task\n");
182 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
185 static void deinterlace_lock(void *priv)
187 struct deinterlace_ctx *ctx = priv;
188 struct deinterlace_dev *pcdev = ctx->dev;
189 mutex_lock(&pcdev->dev_mutex);
192 static void deinterlace_unlock(void *priv)
194 struct deinterlace_ctx *ctx = priv;
195 struct deinterlace_dev *pcdev = ctx->dev;
196 mutex_unlock(&pcdev->dev_mutex);
199 static void dma_callback(void *data)
201 struct deinterlace_ctx *curr_ctx = data;
202 struct deinterlace_dev *pcdev = curr_ctx->dev;
203 struct vb2_buffer *src_vb, *dst_vb;
205 atomic_set(&pcdev->busy, 0);
207 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
208 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
210 dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp;
211 dst_vb->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
212 dst_vb->v4l2_buf.flags |=
213 src_vb->v4l2_buf.flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
214 dst_vb->v4l2_buf.timecode = src_vb->v4l2_buf.timecode;
216 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
217 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
219 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
221 dprintk(pcdev, "dma transfers completed.\n");
224 static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,
227 struct deinterlace_q_data *s_q_data;
228 struct vb2_buffer *src_buf, *dst_buf;
229 struct deinterlace_dev *pcdev = ctx->dev;
230 struct dma_chan *chan = pcdev->dma_chan;
231 struct dma_device *dmadev = chan->device;
232 struct dma_async_tx_descriptor *tx;
233 unsigned int s_width, s_height;
235 dma_addr_t p_in, p_out;
236 enum dma_ctrl_flags flags;
238 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
239 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
241 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
242 s_width = s_q_data->width;
243 s_height = s_q_data->height;
244 s_size = s_width * s_height;
246 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0);
247 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0);
248 if (!p_in || !p_out) {
249 v4l2_err(&pcdev->v4l2_dev,
250 "Acquiring kernel pointers to buffers failed\n");
255 case YUV420_DMA_Y_ODD:
256 ctx->xt->numf = s_height / 2;
257 ctx->xt->sgl[0].size = s_width;
258 ctx->xt->sgl[0].icg = s_width;
259 ctx->xt->src_start = p_in;
260 ctx->xt->dst_start = p_out;
262 case YUV420_DMA_Y_EVEN:
263 ctx->xt->numf = s_height / 2;
264 ctx->xt->sgl[0].size = s_width;
265 ctx->xt->sgl[0].icg = s_width;
266 ctx->xt->src_start = p_in + s_size / 2;
267 ctx->xt->dst_start = p_out + s_width;
269 case YUV420_DMA_U_ODD:
270 ctx->xt->numf = s_height / 4;
271 ctx->xt->sgl[0].size = s_width / 2;
272 ctx->xt->sgl[0].icg = s_width / 2;
273 ctx->xt->src_start = p_in + s_size;
274 ctx->xt->dst_start = p_out + s_size;
276 case YUV420_DMA_U_EVEN:
277 ctx->xt->numf = s_height / 4;
278 ctx->xt->sgl[0].size = s_width / 2;
279 ctx->xt->sgl[0].icg = s_width / 2;
280 ctx->xt->src_start = p_in + (9 * s_size) / 8;
281 ctx->xt->dst_start = p_out + s_size + s_width / 2;
283 case YUV420_DMA_V_ODD:
284 ctx->xt->numf = s_height / 4;
285 ctx->xt->sgl[0].size = s_width / 2;
286 ctx->xt->sgl[0].icg = s_width / 2;
287 ctx->xt->src_start = p_in + (5 * s_size) / 4;
288 ctx->xt->dst_start = p_out + (5 * s_size) / 4;
290 case YUV420_DMA_V_EVEN:
291 ctx->xt->numf = s_height / 4;
292 ctx->xt->sgl[0].size = s_width / 2;
293 ctx->xt->sgl[0].icg = s_width / 2;
294 ctx->xt->src_start = p_in + (11 * s_size) / 8;
295 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
297 case YUV420_DMA_Y_ODD_DOUBLING:
298 ctx->xt->numf = s_height / 2;
299 ctx->xt->sgl[0].size = s_width;
300 ctx->xt->sgl[0].icg = s_width;
301 ctx->xt->src_start = p_in;
302 ctx->xt->dst_start = p_out + s_width;
304 case YUV420_DMA_U_ODD_DOUBLING:
305 ctx->xt->numf = s_height / 4;
306 ctx->xt->sgl[0].size = s_width / 2;
307 ctx->xt->sgl[0].icg = s_width / 2;
308 ctx->xt->src_start = p_in + s_size;
309 ctx->xt->dst_start = p_out + s_size + s_width / 2;
311 case YUV420_DMA_V_ODD_DOUBLING:
312 ctx->xt->numf = s_height / 4;
313 ctx->xt->sgl[0].size = s_width / 2;
314 ctx->xt->sgl[0].icg = s_width / 2;
315 ctx->xt->src_start = p_in + (5 * s_size) / 4;
316 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
319 ctx->xt->numf = s_height / 2;
320 ctx->xt->sgl[0].size = s_width * 2;
321 ctx->xt->sgl[0].icg = s_width * 2;
322 ctx->xt->src_start = p_in;
323 ctx->xt->dst_start = p_out;
326 ctx->xt->numf = s_height / 2;
327 ctx->xt->sgl[0].size = s_width * 2;
328 ctx->xt->sgl[0].icg = s_width * 2;
329 ctx->xt->src_start = p_in + s_size;
330 ctx->xt->dst_start = p_out + s_width * 2;
332 case YUYV_DMA_EVEN_DOUBLING:
334 ctx->xt->numf = s_height / 2;
335 ctx->xt->sgl[0].size = s_width * 2;
336 ctx->xt->sgl[0].icg = s_width * 2;
337 ctx->xt->src_start = p_in;
338 ctx->xt->dst_start = p_out + s_width * 2;
342 /* Common parameters for al transfers */
343 ctx->xt->frame_size = 1;
344 ctx->xt->dir = DMA_MEM_TO_MEM;
345 ctx->xt->src_sgl = false;
346 ctx->xt->dst_sgl = true;
347 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
349 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags);
351 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n");
356 tx->callback = dma_callback;
357 tx->callback_param = ctx;
360 ctx->cookie = dmaengine_submit(tx);
361 if (dma_submit_error(ctx->cookie)) {
362 v4l2_warn(&pcdev->v4l2_dev,
363 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n",
364 ctx->cookie, (unsigned)p_in, (unsigned)p_out,
369 dma_async_issue_pending(chan);
372 static void deinterlace_device_run(void *priv)
374 struct deinterlace_ctx *ctx = priv;
375 struct deinterlace_q_data *dst_q_data;
377 atomic_set(&ctx->dev->busy, 1);
379 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__);
381 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
384 * 4 possible field conversions are possible at the moment:
385 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB:
386 * two separate fields in the same input buffer are interlaced
387 * in the output buffer using weaving. Top field comes first.
388 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE:
389 * top field from the input buffer is copied to the output buffer
390 * using line doubling. Bottom field from the input buffer is discarded.
391 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT:
392 * two separate fields in the same input buffer are interlaced
393 * in the output buffer using weaving. Bottom field comes first.
394 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE:
395 * bottom field from the input buffer is copied to the output buffer
396 * using line doubling. Top field from the input buffer is discarded.
398 switch (dst_q_data->fmt->fourcc) {
399 case V4L2_PIX_FMT_YUV420:
400 switch (dst_q_data->field) {
401 case V4L2_FIELD_INTERLACED_TB:
402 case V4L2_FIELD_INTERLACED_BT:
403 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n",
405 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
406 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0);
407 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
408 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0);
409 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
410 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1);
412 case V4L2_FIELD_NONE:
414 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n",
416 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
417 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0);
418 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
419 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0);
420 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
421 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1);
425 case V4L2_PIX_FMT_YUYV:
427 switch (dst_q_data->field) {
428 case V4L2_FIELD_INTERLACED_TB:
429 case V4L2_FIELD_INTERLACED_BT:
430 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n",
432 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
433 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1);
435 case V4L2_FIELD_NONE:
437 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n",
439 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
440 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1);
446 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__);
452 static int vidioc_querycap(struct file *file, void *priv,
453 struct v4l2_capability *cap)
455 strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
456 strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
457 strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card));
459 * This is only a mem-to-mem video device. The capture and output
460 * device capability flags are left only for backward compatibility
461 * and are scheduled for removal.
463 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
464 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
465 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
470 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
473 struct deinterlace_fmt *fmt;
477 for (i = 0; i < NUM_FORMATS; ++i) {
478 if (formats[i].types & type) {
479 /* index-th format of type type found ? */
482 /* Correct type but haven't reached our index yet,
483 * just increment per-type index */
488 if (i < NUM_FORMATS) {
491 strlcpy(f->description, fmt->name, sizeof(f->description));
492 f->pixelformat = fmt->fourcc;
496 /* Format not found */
500 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
501 struct v4l2_fmtdesc *f)
503 return enum_fmt(f, MEM2MEM_CAPTURE);
506 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
507 struct v4l2_fmtdesc *f)
509 return enum_fmt(f, MEM2MEM_OUTPUT);
512 static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
514 struct vb2_queue *vq;
515 struct deinterlace_q_data *q_data;
517 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
521 q_data = get_q_data(f->type);
523 f->fmt.pix.width = q_data->width;
524 f->fmt.pix.height = q_data->height;
525 f->fmt.pix.field = q_data->field;
526 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
528 switch (q_data->fmt->fourcc) {
529 case V4L2_PIX_FMT_YUV420:
530 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
532 case V4L2_PIX_FMT_YUYV:
534 f->fmt.pix.bytesperline = q_data->width * 2;
537 f->fmt.pix.sizeimage = q_data->sizeimage;
538 f->fmt.pix.colorspace = ctx->colorspace;
543 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
544 struct v4l2_format *f)
546 return vidioc_g_fmt(priv, f);
549 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
550 struct v4l2_format *f)
552 return vidioc_g_fmt(priv, f);
555 static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)
557 switch (f->fmt.pix.pixelformat) {
558 case V4L2_PIX_FMT_YUV420:
559 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
561 case V4L2_PIX_FMT_YUYV:
563 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
565 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
570 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
571 struct v4l2_format *f)
573 struct deinterlace_fmt *fmt;
574 struct deinterlace_ctx *ctx = priv;
576 fmt = find_format(f);
577 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))
578 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
580 f->fmt.pix.colorspace = ctx->colorspace;
582 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&
583 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&
584 f->fmt.pix.field != V4L2_FIELD_NONE)
585 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
587 return vidioc_try_fmt(f, fmt);
590 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
591 struct v4l2_format *f)
593 struct deinterlace_fmt *fmt;
595 fmt = find_format(f);
596 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))
597 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
599 if (!f->fmt.pix.colorspace)
600 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
602 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&
603 f->fmt.pix.field != V4L2_FIELD_SEQ_BT)
604 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
606 return vidioc_try_fmt(f, fmt);
609 static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
611 struct deinterlace_q_data *q_data;
612 struct vb2_queue *vq;
614 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
618 q_data = get_q_data(f->type);
622 if (vb2_is_busy(vq)) {
623 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
627 q_data->fmt = find_format(f);
629 v4l2_err(&ctx->dev->v4l2_dev,
630 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",
631 f->type, f->fmt.pix.width, f->fmt.pix.height,
632 f->fmt.pix.pixelformat, f->fmt.pix.field);
636 q_data->width = f->fmt.pix.width;
637 q_data->height = f->fmt.pix.height;
638 q_data->field = f->fmt.pix.field;
640 switch (f->fmt.pix.pixelformat) {
641 case V4L2_PIX_FMT_YUV420:
642 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
643 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;
645 case V4L2_PIX_FMT_YUYV:
647 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
648 q_data->sizeimage = q_data->width * q_data->height * 2;
652 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
653 f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
659 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
660 struct v4l2_format *f)
664 ret = vidioc_try_fmt_vid_cap(file, priv, f);
667 return vidioc_s_fmt(priv, f);
670 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
671 struct v4l2_format *f)
673 struct deinterlace_ctx *ctx = priv;
676 ret = vidioc_try_fmt_vid_out(file, priv, f);
680 ret = vidioc_s_fmt(priv, f);
682 ctx->colorspace = f->fmt.pix.colorspace;
687 static int vidioc_reqbufs(struct file *file, void *priv,
688 struct v4l2_requestbuffers *reqbufs)
690 struct deinterlace_ctx *ctx = priv;
692 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
695 static int vidioc_querybuf(struct file *file, void *priv,
696 struct v4l2_buffer *buf)
698 struct deinterlace_ctx *ctx = priv;
700 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
703 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
705 struct deinterlace_ctx *ctx = priv;
707 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
710 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
712 struct deinterlace_ctx *ctx = priv;
714 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
717 static int vidioc_streamon(struct file *file, void *priv,
718 enum v4l2_buf_type type)
720 struct deinterlace_q_data *s_q_data, *d_q_data;
721 struct deinterlace_ctx *ctx = priv;
723 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
724 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
726 /* Check that src and dst queues have the same pix format */
727 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {
728 v4l2_err(&ctx->dev->v4l2_dev,
729 "src and dst formats don't match.\n");
733 /* Check that input and output deinterlacing types are compatible */
734 switch (s_q_data->field) {
735 case V4L2_FIELD_SEQ_BT:
736 if (d_q_data->field != V4L2_FIELD_NONE &&
737 d_q_data->field != V4L2_FIELD_INTERLACED_BT) {
738 v4l2_err(&ctx->dev->v4l2_dev,
739 "src and dst field conversion [(%d)->(%d)] not supported.\n",
740 s_q_data->field, d_q_data->field);
744 case V4L2_FIELD_SEQ_TB:
745 if (d_q_data->field != V4L2_FIELD_NONE &&
746 d_q_data->field != V4L2_FIELD_INTERLACED_TB) {
747 v4l2_err(&ctx->dev->v4l2_dev,
748 "src and dst field conversion [(%d)->(%d)] not supported.\n",
749 s_q_data->field, d_q_data->field);
757 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
760 static int vidioc_streamoff(struct file *file, void *priv,
761 enum v4l2_buf_type type)
763 struct deinterlace_ctx *ctx = priv;
765 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
768 static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
769 .vidioc_querycap = vidioc_querycap,
771 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
772 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
773 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
774 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
776 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
777 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
778 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
779 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
781 .vidioc_reqbufs = vidioc_reqbufs,
782 .vidioc_querybuf = vidioc_querybuf,
784 .vidioc_qbuf = vidioc_qbuf,
785 .vidioc_dqbuf = vidioc_dqbuf,
787 .vidioc_streamon = vidioc_streamon,
788 .vidioc_streamoff = vidioc_streamoff,
799 static int deinterlace_queue_setup(struct vb2_queue *vq,
800 const struct v4l2_format *fmt,
801 unsigned int *nbuffers, unsigned int *nplanes,
802 unsigned int sizes[], void *alloc_ctxs[])
804 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
805 struct deinterlace_q_data *q_data;
806 unsigned int size, count = *nbuffers;
808 q_data = get_q_data(vq->type);
810 switch (q_data->fmt->fourcc) {
811 case V4L2_PIX_FMT_YUV420:
812 size = q_data->width * q_data->height * 3 / 2;
814 case V4L2_PIX_FMT_YUYV:
816 size = q_data->width * q_data->height * 2;
823 alloc_ctxs[0] = ctx->dev->alloc_ctx;
825 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
830 static int deinterlace_buf_prepare(struct vb2_buffer *vb)
832 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
833 struct deinterlace_q_data *q_data;
835 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
837 q_data = get_q_data(vb->vb2_queue->type);
839 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
840 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
841 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
845 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
850 static void deinterlace_buf_queue(struct vb2_buffer *vb)
852 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
853 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
856 static struct vb2_ops deinterlace_qops = {
857 .queue_setup = deinterlace_queue_setup,
858 .buf_prepare = deinterlace_buf_prepare,
859 .buf_queue = deinterlace_buf_queue,
862 static int queue_init(void *priv, struct vb2_queue *src_vq,
863 struct vb2_queue *dst_vq)
865 struct deinterlace_ctx *ctx = priv;
868 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
869 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
870 src_vq->drv_priv = ctx;
871 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
872 src_vq->ops = &deinterlace_qops;
873 src_vq->mem_ops = &vb2_dma_contig_memops;
874 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
875 q_data[V4L2_M2M_SRC].fmt = &formats[0];
876 q_data[V4L2_M2M_SRC].width = 640;
877 q_data[V4L2_M2M_SRC].height = 480;
878 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;
879 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;
881 ret = vb2_queue_init(src_vq);
885 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
886 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
887 dst_vq->drv_priv = ctx;
888 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
889 dst_vq->ops = &deinterlace_qops;
890 dst_vq->mem_ops = &vb2_dma_contig_memops;
891 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
892 q_data[V4L2_M2M_DST].fmt = &formats[0];
893 q_data[V4L2_M2M_DST].width = 640;
894 q_data[V4L2_M2M_DST].height = 480;
895 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
896 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
898 return vb2_queue_init(dst_vq);
904 static int deinterlace_open(struct file *file)
906 struct deinterlace_dev *pcdev = video_drvdata(file);
907 struct deinterlace_ctx *ctx = NULL;
909 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
913 file->private_data = ctx;
916 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
917 if (IS_ERR(ctx->m2m_ctx)) {
918 int ret = PTR_ERR(ctx->m2m_ctx);
924 ctx->xt = kzalloc(sizeof(struct dma_interleaved_template) +
925 sizeof(struct data_chunk), GFP_KERNEL);
931 ctx->colorspace = V4L2_COLORSPACE_REC709;
933 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
938 static int deinterlace_release(struct file *file)
940 struct deinterlace_dev *pcdev = video_drvdata(file);
941 struct deinterlace_ctx *ctx = file->private_data;
943 dprintk(pcdev, "Releasing instance %p\n", ctx);
945 v4l2_m2m_ctx_release(ctx->m2m_ctx);
952 static unsigned int deinterlace_poll(struct file *file,
953 struct poll_table_struct *wait)
955 struct deinterlace_ctx *ctx = file->private_data;
958 deinterlace_lock(ctx);
959 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
960 deinterlace_unlock(ctx);
965 static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
967 struct deinterlace_ctx *ctx = file->private_data;
969 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
972 static const struct v4l2_file_operations deinterlace_fops = {
973 .owner = THIS_MODULE,
974 .open = deinterlace_open,
975 .release = deinterlace_release,
976 .poll = deinterlace_poll,
977 .unlocked_ioctl = video_ioctl2,
978 .mmap = deinterlace_mmap,
981 static struct video_device deinterlace_videodev = {
982 .name = MEM2MEM_NAME,
983 .fops = &deinterlace_fops,
984 .ioctl_ops = &deinterlace_ioctl_ops,
986 .release = video_device_release,
987 .vfl_dir = VFL_DIR_M2M,
990 static struct v4l2_m2m_ops m2m_ops = {
991 .device_run = deinterlace_device_run,
992 .job_ready = deinterlace_job_ready,
993 .job_abort = deinterlace_job_abort,
994 .lock = deinterlace_lock,
995 .unlock = deinterlace_unlock,
998 static int deinterlace_probe(struct platform_device *pdev)
1000 struct deinterlace_dev *pcdev;
1001 struct video_device *vfd;
1002 dma_cap_mask_t mask;
1005 pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
1009 spin_lock_init(&pcdev->irqlock);
1012 dma_cap_set(DMA_INTERLEAVE, mask);
1013 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
1014 if (!pcdev->dma_chan)
1017 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
1018 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n");
1022 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
1026 atomic_set(&pcdev->busy, 0);
1027 mutex_init(&pcdev->dev_mutex);
1029 vfd = video_device_alloc();
1031 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
1036 *vfd = deinterlace_videodev;
1037 vfd->lock = &pcdev->dev_mutex;
1038 vfd->v4l2_dev = &pcdev->v4l2_dev;
1040 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1042 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
1046 video_set_drvdata(vfd, pcdev);
1047 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
1049 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
1050 " Device registered as /dev/video%d\n", vfd->num);
1052 platform_set_drvdata(pdev, pcdev);
1054 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1055 if (IS_ERR(pcdev->alloc_ctx)) {
1056 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
1057 ret = PTR_ERR(pcdev->alloc_ctx);
1061 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1062 if (IS_ERR(pcdev->m2m_dev)) {
1063 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
1064 ret = PTR_ERR(pcdev->m2m_dev);
1070 v4l2_m2m_release(pcdev->m2m_dev);
1072 video_unregister_device(pcdev->vfd);
1074 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1076 video_device_release(vfd);
1078 v4l2_device_unregister(&pcdev->v4l2_dev);
1080 dma_release_channel(pcdev->dma_chan);
1087 static int deinterlace_remove(struct platform_device *pdev)
1089 struct deinterlace_dev *pcdev = platform_get_drvdata(pdev);
1091 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
1092 v4l2_m2m_release(pcdev->m2m_dev);
1093 video_unregister_device(pcdev->vfd);
1094 v4l2_device_unregister(&pcdev->v4l2_dev);
1095 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1096 dma_release_channel(pcdev->dma_chan);
1102 static struct platform_driver deinterlace_pdrv = {
1103 .probe = deinterlace_probe,
1104 .remove = deinterlace_remove,
1106 .name = MEM2MEM_NAME,
1107 .owner = THIS_MODULE,
1110 module_platform_driver(deinterlace_pdrv);