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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>
18
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>
23
24#define MEM2MEM_TEST_MODULE_NAME "mem2mem-deinterlace"
25
26MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine");
27MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
28MODULE_LICENSE("GPL");
29MODULE_VERSION("0.0.1");
30
31static bool debug;
32module_param(debug, bool, 0644);
33
34
35#define MEM2MEM_CAPTURE (1 << 0)
36#define MEM2MEM_OUTPUT (1 << 1)
37
38#define MEM2MEM_NAME "m2m-deinterlace"
39
40#define dprintk(dev, fmt, arg...) \
41 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
42
43struct deinterlace_fmt {
44 char *name;
45 u32 fourcc;
46
47 u32 types;
48};
49
50static struct deinterlace_fmt formats[] = {
51 {
52 .name = "YUV 4:2:0 Planar",
53 .fourcc = V4L2_PIX_FMT_YUV420,
54 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
55 },
56 {
57 .name = "YUYV 4:2:2",
58 .fourcc = V4L2_PIX_FMT_YUYV,
59 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
60 },
61};
62
63#define NUM_FORMATS ARRAY_SIZE(formats)
64
65
66struct deinterlace_q_data {
67 unsigned int width;
68 unsigned int height;
69 unsigned int sizeimage;
70 struct deinterlace_fmt *fmt;
71 enum v4l2_field field;
72};
73
74enum {
75 V4L2_M2M_SRC = 0,
76 V4L2_M2M_DST = 1,
77};
78
79enum {
80 YUV420_DMA_Y_ODD,
81 YUV420_DMA_Y_EVEN,
82 YUV420_DMA_U_ODD,
83 YUV420_DMA_U_EVEN,
84 YUV420_DMA_V_ODD,
85 YUV420_DMA_V_EVEN,
86 YUV420_DMA_Y_ODD_DOUBLING,
87 YUV420_DMA_U_ODD_DOUBLING,
88 YUV420_DMA_V_ODD_DOUBLING,
89 YUYV_DMA_ODD,
90 YUYV_DMA_EVEN,
91 YUYV_DMA_EVEN_DOUBLING,
92};
93
94
95static struct deinterlace_q_data q_data[2];
96
97static struct deinterlace_q_data *get_q_data(enum v4l2_buf_type type)
98{
99 switch (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];
104 default:
105 BUG();
106 }
107 return NULL;
108}
109
110static struct deinterlace_fmt *find_format(struct v4l2_format *f)
111{
112 struct deinterlace_fmt *fmt;
113 unsigned int k;
114
115 for (k = 0; k < NUM_FORMATS; k++) {
116 fmt = &formats[k];
117 if ((fmt->types & f->type) &&
118 (fmt->fourcc == f->fmt.pix.pixelformat))
119 break;
120 }
121
122 if (k == NUM_FORMATS)
123 return NULL;
124
125 return &formats[k];
126}
127
128struct deinterlace_dev {
129 struct v4l2_device v4l2_dev;
130 struct video_device vfd;
131
132 atomic_t busy;
133 struct mutex dev_mutex;
134 spinlock_t irqlock;
135
136 struct dma_chan *dma_chan;
137
138 struct v4l2_m2m_dev *m2m_dev;
139 struct vb2_alloc_ctx *alloc_ctx;
140};
141
142struct deinterlace_ctx {
143 struct deinterlace_dev *dev;
144
145
146 int aborting;
147 enum v4l2_colorspace colorspace;
148 dma_cookie_t cookie;
149 struct v4l2_m2m_ctx *m2m_ctx;
150 struct dma_interleaved_template *xt;
151};
152
153
154
155
156static int deinterlace_job_ready(void *priv)
157{
158 struct deinterlace_ctx *ctx = priv;
159 struct deinterlace_dev *pcdev = ctx->dev;
160
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");
165 return 1;
166 }
167
168 dprintk(pcdev, "Task not ready to run\n");
169
170 return 0;
171}
172
173static void deinterlace_job_abort(void *priv)
174{
175 struct deinterlace_ctx *ctx = priv;
176 struct deinterlace_dev *pcdev = ctx->dev;
177
178 ctx->aborting = 1;
179
180 dprintk(pcdev, "Aborting task\n");
181
182 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
183}
184
185static void deinterlace_lock(void *priv)
186{
187 struct deinterlace_ctx *ctx = priv;
188 struct deinterlace_dev *pcdev = ctx->dev;
189 mutex_lock(&pcdev->dev_mutex);
190}
191
192static void deinterlace_unlock(void *priv)
193{
194 struct deinterlace_ctx *ctx = priv;
195 struct deinterlace_dev *pcdev = ctx->dev;
196 mutex_unlock(&pcdev->dev_mutex);
197}
198
199static void dma_callback(void *data)
200{
201 struct deinterlace_ctx *curr_ctx = data;
202 struct deinterlace_dev *pcdev = curr_ctx->dev;
203 struct vb2_v4l2_buffer *src_vb, *dst_vb;
204
205 atomic_set(&pcdev->busy, 0);
206
207 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
208 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
209
210 dst_vb->timestamp = src_vb->timestamp;
211 dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
212 dst_vb->flags |=
213 src_vb->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
214 dst_vb->timecode = src_vb->timecode;
215
216 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
217 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
218
219 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
220
221 dprintk(pcdev, "dma transfers completed.\n");
222}
223
224static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,
225 int do_callback)
226{
227 struct deinterlace_q_data *s_q_data;
228 struct vb2_v4l2_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;
234 unsigned int s_size;
235 dma_addr_t p_in, p_out;
236 enum dma_ctrl_flags flags;
237
238 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
239 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
240
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;
245
246 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
247 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf,
248 0);
249 if (!p_in || !p_out) {
250 v4l2_err(&pcdev->v4l2_dev,
251 "Acquiring kernel pointers to buffers failed\n");
252 return;
253 }
254
255 switch (op) {
256 case YUV420_DMA_Y_ODD:
257 ctx->xt->numf = s_height / 2;
258 ctx->xt->sgl[0].size = s_width;
259 ctx->xt->sgl[0].icg = s_width;
260 ctx->xt->src_start = p_in;
261 ctx->xt->dst_start = p_out;
262 break;
263 case YUV420_DMA_Y_EVEN:
264 ctx->xt->numf = s_height / 2;
265 ctx->xt->sgl[0].size = s_width;
266 ctx->xt->sgl[0].icg = s_width;
267 ctx->xt->src_start = p_in + s_size / 2;
268 ctx->xt->dst_start = p_out + s_width;
269 break;
270 case YUV420_DMA_U_ODD:
271 ctx->xt->numf = s_height / 4;
272 ctx->xt->sgl[0].size = s_width / 2;
273 ctx->xt->sgl[0].icg = s_width / 2;
274 ctx->xt->src_start = p_in + s_size;
275 ctx->xt->dst_start = p_out + s_size;
276 break;
277 case YUV420_DMA_U_EVEN:
278 ctx->xt->numf = s_height / 4;
279 ctx->xt->sgl[0].size = s_width / 2;
280 ctx->xt->sgl[0].icg = s_width / 2;
281 ctx->xt->src_start = p_in + (9 * s_size) / 8;
282 ctx->xt->dst_start = p_out + s_size + s_width / 2;
283 break;
284 case YUV420_DMA_V_ODD:
285 ctx->xt->numf = s_height / 4;
286 ctx->xt->sgl[0].size = s_width / 2;
287 ctx->xt->sgl[0].icg = s_width / 2;
288 ctx->xt->src_start = p_in + (5 * s_size) / 4;
289 ctx->xt->dst_start = p_out + (5 * s_size) / 4;
290 break;
291 case YUV420_DMA_V_EVEN:
292 ctx->xt->numf = s_height / 4;
293 ctx->xt->sgl[0].size = s_width / 2;
294 ctx->xt->sgl[0].icg = s_width / 2;
295 ctx->xt->src_start = p_in + (11 * s_size) / 8;
296 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
297 break;
298 case YUV420_DMA_Y_ODD_DOUBLING:
299 ctx->xt->numf = s_height / 2;
300 ctx->xt->sgl[0].size = s_width;
301 ctx->xt->sgl[0].icg = s_width;
302 ctx->xt->src_start = p_in;
303 ctx->xt->dst_start = p_out + s_width;
304 break;
305 case YUV420_DMA_U_ODD_DOUBLING:
306 ctx->xt->numf = s_height / 4;
307 ctx->xt->sgl[0].size = s_width / 2;
308 ctx->xt->sgl[0].icg = s_width / 2;
309 ctx->xt->src_start = p_in + s_size;
310 ctx->xt->dst_start = p_out + s_size + s_width / 2;
311 break;
312 case YUV420_DMA_V_ODD_DOUBLING:
313 ctx->xt->numf = s_height / 4;
314 ctx->xt->sgl[0].size = s_width / 2;
315 ctx->xt->sgl[0].icg = s_width / 2;
316 ctx->xt->src_start = p_in + (5 * s_size) / 4;
317 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
318 break;
319 case YUYV_DMA_ODD:
320 ctx->xt->numf = s_height / 2;
321 ctx->xt->sgl[0].size = s_width * 2;
322 ctx->xt->sgl[0].icg = s_width * 2;
323 ctx->xt->src_start = p_in;
324 ctx->xt->dst_start = p_out;
325 break;
326 case YUYV_DMA_EVEN:
327 ctx->xt->numf = s_height / 2;
328 ctx->xt->sgl[0].size = s_width * 2;
329 ctx->xt->sgl[0].icg = s_width * 2;
330 ctx->xt->src_start = p_in + s_size;
331 ctx->xt->dst_start = p_out + s_width * 2;
332 break;
333 case YUYV_DMA_EVEN_DOUBLING:
334 default:
335 ctx->xt->numf = s_height / 2;
336 ctx->xt->sgl[0].size = s_width * 2;
337 ctx->xt->sgl[0].icg = s_width * 2;
338 ctx->xt->src_start = p_in;
339 ctx->xt->dst_start = p_out + s_width * 2;
340 break;
341 }
342
343
344 ctx->xt->frame_size = 1;
345 ctx->xt->dir = DMA_MEM_TO_MEM;
346 ctx->xt->src_sgl = false;
347 ctx->xt->dst_sgl = true;
348 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
349
350 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags);
351 if (tx == NULL) {
352 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n");
353 return;
354 }
355
356 if (do_callback) {
357 tx->callback = dma_callback;
358 tx->callback_param = ctx;
359 }
360
361 ctx->cookie = dmaengine_submit(tx);
362 if (dma_submit_error(ctx->cookie)) {
363 v4l2_warn(&pcdev->v4l2_dev,
364 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n",
365 ctx->cookie, (unsigned)p_in, (unsigned)p_out,
366 s_size * 3/2);
367 return;
368 }
369
370 dma_async_issue_pending(chan);
371}
372
373static void deinterlace_device_run(void *priv)
374{
375 struct deinterlace_ctx *ctx = priv;
376 struct deinterlace_q_data *dst_q_data;
377
378 atomic_set(&ctx->dev->busy, 1);
379
380 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__);
381
382 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
383
384
385
386
387
388
389
390
391
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393
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395
396
397
398
399 switch (dst_q_data->fmt->fourcc) {
400 case V4L2_PIX_FMT_YUV420:
401 switch (dst_q_data->field) {
402 case V4L2_FIELD_INTERLACED_TB:
403 case V4L2_FIELD_INTERLACED_BT:
404 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n",
405 __func__);
406 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
407 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0);
408 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
409 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0);
410 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
411 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1);
412 break;
413 case V4L2_FIELD_NONE:
414 default:
415 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n",
416 __func__);
417 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
418 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0);
419 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
420 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0);
421 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
422 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1);
423 break;
424 }
425 break;
426 case V4L2_PIX_FMT_YUYV:
427 default:
428 switch (dst_q_data->field) {
429 case V4L2_FIELD_INTERLACED_TB:
430 case V4L2_FIELD_INTERLACED_BT:
431 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n",
432 __func__);
433 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
434 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1);
435 break;
436 case V4L2_FIELD_NONE:
437 default:
438 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n",
439 __func__);
440 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
441 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1);
442 break;
443 }
444 break;
445 }
446
447 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__);
448}
449
450
451
452
453static int vidioc_querycap(struct file *file, void *priv,
454 struct v4l2_capability *cap)
455{
456 strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
457 strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
458 strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card));
459
460
461
462
463
464 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
465 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
466 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
467
468 return 0;
469}
470
471static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
472{
473 int i, num;
474 struct deinterlace_fmt *fmt;
475
476 num = 0;
477
478 for (i = 0; i < NUM_FORMATS; ++i) {
479 if (formats[i].types & type) {
480
481 if (num == f->index)
482 break;
483
484
485 ++num;
486 }
487 }
488
489 if (i < NUM_FORMATS) {
490
491 fmt = &formats[i];
492 strlcpy(f->description, fmt->name, sizeof(f->description));
493 f->pixelformat = fmt->fourcc;
494 return 0;
495 }
496
497
498 return -EINVAL;
499}
500
501static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
502 struct v4l2_fmtdesc *f)
503{
504 return enum_fmt(f, MEM2MEM_CAPTURE);
505}
506
507static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
508 struct v4l2_fmtdesc *f)
509{
510 return enum_fmt(f, MEM2MEM_OUTPUT);
511}
512
513static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
514{
515 struct vb2_queue *vq;
516 struct deinterlace_q_data *q_data;
517
518 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
519 if (!vq)
520 return -EINVAL;
521
522 q_data = get_q_data(f->type);
523
524 f->fmt.pix.width = q_data->width;
525 f->fmt.pix.height = q_data->height;
526 f->fmt.pix.field = q_data->field;
527 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
528
529 switch (q_data->fmt->fourcc) {
530 case V4L2_PIX_FMT_YUV420:
531 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
532 break;
533 case V4L2_PIX_FMT_YUYV:
534 default:
535 f->fmt.pix.bytesperline = q_data->width * 2;
536 }
537
538 f->fmt.pix.sizeimage = q_data->sizeimage;
539 f->fmt.pix.colorspace = ctx->colorspace;
540
541 return 0;
542}
543
544static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
545 struct v4l2_format *f)
546{
547 return vidioc_g_fmt(priv, f);
548}
549
550static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
551 struct v4l2_format *f)
552{
553 return vidioc_g_fmt(priv, f);
554}
555
556static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)
557{
558 switch (f->fmt.pix.pixelformat) {
559 case V4L2_PIX_FMT_YUV420:
560 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
561 break;
562 case V4L2_PIX_FMT_YUYV:
563 default:
564 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
565 }
566 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
567
568 return 0;
569}
570
571static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
572 struct v4l2_format *f)
573{
574 struct deinterlace_fmt *fmt;
575 struct deinterlace_ctx *ctx = priv;
576
577 fmt = find_format(f);
578 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))
579 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
580
581 f->fmt.pix.colorspace = ctx->colorspace;
582
583 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&
584 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&
585 f->fmt.pix.field != V4L2_FIELD_NONE)
586 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
587
588 return vidioc_try_fmt(f, fmt);
589}
590
591static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
592 struct v4l2_format *f)
593{
594 struct deinterlace_fmt *fmt;
595
596 fmt = find_format(f);
597 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))
598 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
599
600 if (!f->fmt.pix.colorspace)
601 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
602
603 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&
604 f->fmt.pix.field != V4L2_FIELD_SEQ_BT)
605 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
606
607 return vidioc_try_fmt(f, fmt);
608}
609
610static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
611{
612 struct deinterlace_q_data *q_data;
613 struct vb2_queue *vq;
614
615 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
616 if (!vq)
617 return -EINVAL;
618
619 q_data = get_q_data(f->type);
620 if (!q_data)
621 return -EINVAL;
622
623 if (vb2_is_busy(vq)) {
624 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
625 return -EBUSY;
626 }
627
628 q_data->fmt = find_format(f);
629 if (!q_data->fmt) {
630 v4l2_err(&ctx->dev->v4l2_dev,
631 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",
632 f->type, f->fmt.pix.width, f->fmt.pix.height,
633 f->fmt.pix.pixelformat, f->fmt.pix.field);
634 return -EINVAL;
635 }
636
637 q_data->width = f->fmt.pix.width;
638 q_data->height = f->fmt.pix.height;
639 q_data->field = f->fmt.pix.field;
640
641 switch (f->fmt.pix.pixelformat) {
642 case V4L2_PIX_FMT_YUV420:
643 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
644 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;
645 break;
646 case V4L2_PIX_FMT_YUYV:
647 default:
648 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
649 q_data->sizeimage = q_data->width * q_data->height * 2;
650 }
651
652 dprintk(ctx->dev,
653 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
654 f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
655 q_data->field);
656
657 return 0;
658}
659
660static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
661 struct v4l2_format *f)
662{
663 int ret;
664
665 ret = vidioc_try_fmt_vid_cap(file, priv, f);
666 if (ret)
667 return ret;
668 return vidioc_s_fmt(priv, f);
669}
670
671static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
672 struct v4l2_format *f)
673{
674 struct deinterlace_ctx *ctx = priv;
675 int ret;
676
677 ret = vidioc_try_fmt_vid_out(file, priv, f);
678 if (ret)
679 return ret;
680
681 ret = vidioc_s_fmt(priv, f);
682 if (!ret)
683 ctx->colorspace = f->fmt.pix.colorspace;
684
685 return ret;
686}
687
688static int vidioc_reqbufs(struct file *file, void *priv,
689 struct v4l2_requestbuffers *reqbufs)
690{
691 struct deinterlace_ctx *ctx = priv;
692
693 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
694}
695
696static int vidioc_querybuf(struct file *file, void *priv,
697 struct v4l2_buffer *buf)
698{
699 struct deinterlace_ctx *ctx = priv;
700
701 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
702}
703
704static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
705{
706 struct deinterlace_ctx *ctx = priv;
707
708 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
709}
710
711static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
712{
713 struct deinterlace_ctx *ctx = priv;
714
715 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
716}
717
718static int vidioc_streamon(struct file *file, void *priv,
719 enum v4l2_buf_type type)
720{
721 struct deinterlace_q_data *s_q_data, *d_q_data;
722 struct deinterlace_ctx *ctx = priv;
723
724 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
725 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
726
727
728 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {
729 v4l2_err(&ctx->dev->v4l2_dev,
730 "src and dst formats don't match.\n");
731 return -EINVAL;
732 }
733
734
735 switch (s_q_data->field) {
736 case V4L2_FIELD_SEQ_BT:
737 if (d_q_data->field != V4L2_FIELD_NONE &&
738 d_q_data->field != V4L2_FIELD_INTERLACED_BT) {
739 v4l2_err(&ctx->dev->v4l2_dev,
740 "src and dst field conversion [(%d)->(%d)] not supported.\n",
741 s_q_data->field, d_q_data->field);
742 return -EINVAL;
743 }
744 break;
745 case V4L2_FIELD_SEQ_TB:
746 if (d_q_data->field != V4L2_FIELD_NONE &&
747 d_q_data->field != V4L2_FIELD_INTERLACED_TB) {
748 v4l2_err(&ctx->dev->v4l2_dev,
749 "src and dst field conversion [(%d)->(%d)] not supported.\n",
750 s_q_data->field, d_q_data->field);
751 return -EINVAL;
752 }
753 break;
754 default:
755 return -EINVAL;
756 }
757
758 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
759}
760
761static int vidioc_streamoff(struct file *file, void *priv,
762 enum v4l2_buf_type type)
763{
764 struct deinterlace_ctx *ctx = priv;
765
766 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
767}
768
769static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
770 .vidioc_querycap = vidioc_querycap,
771
772 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
773 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
774 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
775 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
776
777 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
778 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
779 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
780 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
781
782 .vidioc_reqbufs = vidioc_reqbufs,
783 .vidioc_querybuf = vidioc_querybuf,
784
785 .vidioc_qbuf = vidioc_qbuf,
786 .vidioc_dqbuf = vidioc_dqbuf,
787
788 .vidioc_streamon = vidioc_streamon,
789 .vidioc_streamoff = vidioc_streamoff,
790};
791
792
793
794
795
796struct vb2_dc_conf {
797 struct device *dev;
798};
799
800static int deinterlace_queue_setup(struct vb2_queue *vq,
801 const void *parg,
802 unsigned int *nbuffers, unsigned int *nplanes,
803 unsigned int sizes[], void *alloc_ctxs[])
804{
805 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
806 struct deinterlace_q_data *q_data;
807 unsigned int size, count = *nbuffers;
808
809 q_data = get_q_data(vq->type);
810
811 switch (q_data->fmt->fourcc) {
812 case V4L2_PIX_FMT_YUV420:
813 size = q_data->width * q_data->height * 3 / 2;
814 break;
815 case V4L2_PIX_FMT_YUYV:
816 default:
817 size = q_data->width * q_data->height * 2;
818 }
819
820 *nplanes = 1;
821 *nbuffers = count;
822 sizes[0] = size;
823
824 alloc_ctxs[0] = ctx->dev->alloc_ctx;
825
826 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
827
828 return 0;
829}
830
831static int deinterlace_buf_prepare(struct vb2_buffer *vb)
832{
833 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
834 struct deinterlace_q_data *q_data;
835
836 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
837
838 q_data = get_q_data(vb->vb2_queue->type);
839
840 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
841 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
842 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
843 return -EINVAL;
844 }
845
846 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
847
848 return 0;
849}
850
851static void deinterlace_buf_queue(struct vb2_buffer *vb)
852{
853 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
854 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
855
856 v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
857}
858
859static struct vb2_ops deinterlace_qops = {
860 .queue_setup = deinterlace_queue_setup,
861 .buf_prepare = deinterlace_buf_prepare,
862 .buf_queue = deinterlace_buf_queue,
863};
864
865static int queue_init(void *priv, struct vb2_queue *src_vq,
866 struct vb2_queue *dst_vq)
867{
868 struct deinterlace_ctx *ctx = priv;
869 int ret;
870
871 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
872 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
873 src_vq->drv_priv = ctx;
874 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
875 src_vq->ops = &deinterlace_qops;
876 src_vq->mem_ops = &vb2_dma_contig_memops;
877 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
878 q_data[V4L2_M2M_SRC].fmt = &formats[0];
879 q_data[V4L2_M2M_SRC].width = 640;
880 q_data[V4L2_M2M_SRC].height = 480;
881 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;
882 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;
883
884 ret = vb2_queue_init(src_vq);
885 if (ret)
886 return ret;
887
888 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
889 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
890 dst_vq->drv_priv = ctx;
891 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
892 dst_vq->ops = &deinterlace_qops;
893 dst_vq->mem_ops = &vb2_dma_contig_memops;
894 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
895 q_data[V4L2_M2M_DST].fmt = &formats[0];
896 q_data[V4L2_M2M_DST].width = 640;
897 q_data[V4L2_M2M_DST].height = 480;
898 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
899 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
900
901 return vb2_queue_init(dst_vq);
902}
903
904
905
906
907static int deinterlace_open(struct file *file)
908{
909 struct deinterlace_dev *pcdev = video_drvdata(file);
910 struct deinterlace_ctx *ctx = NULL;
911
912 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
913 if (!ctx)
914 return -ENOMEM;
915
916 file->private_data = ctx;
917 ctx->dev = pcdev;
918
919 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
920 if (IS_ERR(ctx->m2m_ctx)) {
921 int ret = PTR_ERR(ctx->m2m_ctx);
922
923 kfree(ctx);
924 return ret;
925 }
926
927 ctx->xt = kzalloc(sizeof(struct dma_interleaved_template) +
928 sizeof(struct data_chunk), GFP_KERNEL);
929 if (!ctx->xt) {
930 kfree(ctx);
931 return -ENOMEM;
932 }
933
934 ctx->colorspace = V4L2_COLORSPACE_REC709;
935
936 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
937
938 return 0;
939}
940
941static int deinterlace_release(struct file *file)
942{
943 struct deinterlace_dev *pcdev = video_drvdata(file);
944 struct deinterlace_ctx *ctx = file->private_data;
945
946 dprintk(pcdev, "Releasing instance %p\n", ctx);
947
948 v4l2_m2m_ctx_release(ctx->m2m_ctx);
949 kfree(ctx->xt);
950 kfree(ctx);
951
952 return 0;
953}
954
955static unsigned int deinterlace_poll(struct file *file,
956 struct poll_table_struct *wait)
957{
958 struct deinterlace_ctx *ctx = file->private_data;
959 int ret;
960
961 deinterlace_lock(ctx);
962 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
963 deinterlace_unlock(ctx);
964
965 return ret;
966}
967
968static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
969{
970 struct deinterlace_ctx *ctx = file->private_data;
971
972 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
973}
974
975static const struct v4l2_file_operations deinterlace_fops = {
976 .owner = THIS_MODULE,
977 .open = deinterlace_open,
978 .release = deinterlace_release,
979 .poll = deinterlace_poll,
980 .unlocked_ioctl = video_ioctl2,
981 .mmap = deinterlace_mmap,
982};
983
984static struct video_device deinterlace_videodev = {
985 .name = MEM2MEM_NAME,
986 .fops = &deinterlace_fops,
987 .ioctl_ops = &deinterlace_ioctl_ops,
988 .minor = -1,
989 .release = video_device_release_empty,
990 .vfl_dir = VFL_DIR_M2M,
991};
992
993static struct v4l2_m2m_ops m2m_ops = {
994 .device_run = deinterlace_device_run,
995 .job_ready = deinterlace_job_ready,
996 .job_abort = deinterlace_job_abort,
997 .lock = deinterlace_lock,
998 .unlock = deinterlace_unlock,
999};
1000
1001static int deinterlace_probe(struct platform_device *pdev)
1002{
1003 struct deinterlace_dev *pcdev;
1004 struct video_device *vfd;
1005 dma_cap_mask_t mask;
1006 int ret = 0;
1007
1008 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
1009 if (!pcdev)
1010 return -ENOMEM;
1011
1012 spin_lock_init(&pcdev->irqlock);
1013
1014 dma_cap_zero(mask);
1015 dma_cap_set(DMA_INTERLEAVE, mask);
1016 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
1017 if (!pcdev->dma_chan)
1018 return -ENODEV;
1019
1020 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
1021 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n");
1022 goto rel_dma;
1023 }
1024
1025 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
1026 if (ret)
1027 goto rel_dma;
1028
1029 atomic_set(&pcdev->busy, 0);
1030 mutex_init(&pcdev->dev_mutex);
1031
1032 vfd = &pcdev->vfd;
1033 *vfd = deinterlace_videodev;
1034 vfd->lock = &pcdev->dev_mutex;
1035 vfd->v4l2_dev = &pcdev->v4l2_dev;
1036
1037 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1038 if (ret) {
1039 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
1040 goto unreg_dev;
1041 }
1042
1043 video_set_drvdata(vfd, pcdev);
1044 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
1045 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
1046 " Device registered as /dev/video%d\n", vfd->num);
1047
1048 platform_set_drvdata(pdev, pcdev);
1049
1050 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1051 if (IS_ERR(pcdev->alloc_ctx)) {
1052 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
1053 ret = PTR_ERR(pcdev->alloc_ctx);
1054 goto err_ctx;
1055 }
1056
1057 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1058 if (IS_ERR(pcdev->m2m_dev)) {
1059 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
1060 ret = PTR_ERR(pcdev->m2m_dev);
1061 goto err_m2m;
1062 }
1063
1064 return 0;
1065
1066err_m2m:
1067 video_unregister_device(&pcdev->vfd);
1068err_ctx:
1069 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1070unreg_dev:
1071 v4l2_device_unregister(&pcdev->v4l2_dev);
1072rel_dma:
1073 dma_release_channel(pcdev->dma_chan);
1074
1075 return ret;
1076}
1077
1078static int deinterlace_remove(struct platform_device *pdev)
1079{
1080 struct deinterlace_dev *pcdev = platform_get_drvdata(pdev);
1081
1082 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
1083 v4l2_m2m_release(pcdev->m2m_dev);
1084 video_unregister_device(&pcdev->vfd);
1085 v4l2_device_unregister(&pcdev->v4l2_dev);
1086 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1087 dma_release_channel(pcdev->dma_chan);
1088
1089 return 0;
1090}
1091
1092static struct platform_driver deinterlace_pdrv = {
1093 .probe = deinterlace_probe,
1094 .remove = deinterlace_remove,
1095 .driver = {
1096 .name = MEM2MEM_NAME,
1097 },
1098};
1099module_platform_driver(deinterlace_pdrv);
1100
1101
