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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_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 src_vb->v4l2_buf.timestamp = dst_vb->v4l2_buf.timestamp;
211 src_vb->v4l2_buf.timecode = dst_vb->v4l2_buf.timecode;
212
213 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
214 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
215
216 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
217
218 dprintk(pcdev, "dma transfers completed.\n");
219}
220
221static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,
222 int do_callback)
223{
224 struct deinterlace_q_data *s_q_data;
225 struct vb2_buffer *src_buf, *dst_buf;
226 struct deinterlace_dev *pcdev = ctx->dev;
227 struct dma_chan *chan = pcdev->dma_chan;
228 struct dma_device *dmadev = chan->device;
229 struct dma_async_tx_descriptor *tx;
230 unsigned int s_width, s_height;
231 unsigned int s_size;
232 dma_addr_t p_in, p_out;
233 enum dma_ctrl_flags flags;
234
235 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
236 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
237
238 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
239 s_width = s_q_data->width;
240 s_height = s_q_data->height;
241 s_size = s_width * s_height;
242
243 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0);
244 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0);
245 if (!p_in || !p_out) {
246 v4l2_err(&pcdev->v4l2_dev,
247 "Acquiring kernel pointers to buffers failed\n");
248 return;
249 }
250
251 switch (op) {
252 case YUV420_DMA_Y_ODD:
253 ctx->xt->numf = s_height / 2;
254 ctx->xt->sgl[0].size = s_width;
255 ctx->xt->sgl[0].icg = s_width;
256 ctx->xt->src_start = p_in;
257 ctx->xt->dst_start = p_out;
258 break;
259 case YUV420_DMA_Y_EVEN:
260 ctx->xt->numf = s_height / 2;
261 ctx->xt->sgl[0].size = s_width;
262 ctx->xt->sgl[0].icg = s_width;
263 ctx->xt->src_start = p_in + s_size / 2;
264 ctx->xt->dst_start = p_out + s_width;
265 break;
266 case YUV420_DMA_U_ODD:
267 ctx->xt->numf = s_height / 4;
268 ctx->xt->sgl[0].size = s_width / 2;
269 ctx->xt->sgl[0].icg = s_width / 2;
270 ctx->xt->src_start = p_in + s_size;
271 ctx->xt->dst_start = p_out + s_size;
272 break;
273 case YUV420_DMA_U_EVEN:
274 ctx->xt->numf = s_height / 4;
275 ctx->xt->sgl[0].size = s_width / 2;
276 ctx->xt->sgl[0].icg = s_width / 2;
277 ctx->xt->src_start = p_in + (9 * s_size) / 8;
278 ctx->xt->dst_start = p_out + s_size + s_width / 2;
279 break;
280 case YUV420_DMA_V_ODD:
281 ctx->xt->numf = s_height / 4;
282 ctx->xt->sgl[0].size = s_width / 2;
283 ctx->xt->sgl[0].icg = s_width / 2;
284 ctx->xt->src_start = p_in + (5 * s_size) / 4;
285 ctx->xt->dst_start = p_out + (5 * s_size) / 4;
286 break;
287 case YUV420_DMA_V_EVEN:
288 ctx->xt->numf = s_height / 4;
289 ctx->xt->sgl[0].size = s_width / 2;
290 ctx->xt->sgl[0].icg = s_width / 2;
291 ctx->xt->src_start = p_in + (11 * s_size) / 8;
292 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
293 break;
294 case YUV420_DMA_Y_ODD_DOUBLING:
295 ctx->xt->numf = s_height / 2;
296 ctx->xt->sgl[0].size = s_width;
297 ctx->xt->sgl[0].icg = s_width;
298 ctx->xt->src_start = p_in;
299 ctx->xt->dst_start = p_out + s_width;
300 break;
301 case YUV420_DMA_U_ODD_DOUBLING:
302 ctx->xt->numf = s_height / 4;
303 ctx->xt->sgl[0].size = s_width / 2;
304 ctx->xt->sgl[0].icg = s_width / 2;
305 ctx->xt->src_start = p_in + s_size;
306 ctx->xt->dst_start = p_out + s_size + s_width / 2;
307 break;
308 case YUV420_DMA_V_ODD_DOUBLING:
309 ctx->xt->numf = s_height / 4;
310 ctx->xt->sgl[0].size = s_width / 2;
311 ctx->xt->sgl[0].icg = s_width / 2;
312 ctx->xt->src_start = p_in + (5 * s_size) / 4;
313 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
314 break;
315 case YUYV_DMA_ODD:
316 ctx->xt->numf = s_height / 2;
317 ctx->xt->sgl[0].size = s_width * 2;
318 ctx->xt->sgl[0].icg = s_width * 2;
319 ctx->xt->src_start = p_in;
320 ctx->xt->dst_start = p_out;
321 break;
322 case YUYV_DMA_EVEN:
323 ctx->xt->numf = s_height / 2;
324 ctx->xt->sgl[0].size = s_width * 2;
325 ctx->xt->sgl[0].icg = s_width * 2;
326 ctx->xt->src_start = p_in + s_size;
327 ctx->xt->dst_start = p_out + s_width * 2;
328 break;
329 case YUYV_DMA_EVEN_DOUBLING:
330 default:
331 ctx->xt->numf = s_height / 2;
332 ctx->xt->sgl[0].size = s_width * 2;
333 ctx->xt->sgl[0].icg = s_width * 2;
334 ctx->xt->src_start = p_in;
335 ctx->xt->dst_start = p_out + s_width * 2;
336 break;
337 }
338
339
340 ctx->xt->frame_size = 1;
341 ctx->xt->dir = DMA_MEM_TO_MEM;
342 ctx->xt->src_sgl = false;
343 ctx->xt->dst_sgl = true;
344 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT |
345 DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SKIP_SRC_UNMAP;
346
347 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags);
348 if (tx == NULL) {
349 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n");
350 return;
351 }
352
353 if (do_callback) {
354 tx->callback = dma_callback;
355 tx->callback_param = ctx;
356 }
357
358 ctx->cookie = dmaengine_submit(tx);
359 if (dma_submit_error(ctx->cookie)) {
360 v4l2_warn(&pcdev->v4l2_dev,
361 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n",
362 ctx->cookie, (unsigned)p_in, (unsigned)p_out,
363 s_size * 3/2);
364 return;
365 }
366
367 dma_async_issue_pending(chan);
368}
369
370static void deinterlace_device_run(void *priv)
371{
372 struct deinterlace_ctx *ctx = priv;
373 struct deinterlace_q_data *dst_q_data;
374
375 atomic_set(&ctx->dev->busy, 1);
376
377 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__);
378
379 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
380
381
382
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385
386
387
388
389
390
391
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393
394
395
396 switch (dst_q_data->fmt->fourcc) {
397 case V4L2_PIX_FMT_YUV420:
398 switch (dst_q_data->field) {
399 case V4L2_FIELD_INTERLACED_TB:
400 case V4L2_FIELD_INTERLACED_BT:
401 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n",
402 __func__);
403 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
404 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0);
405 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
406 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0);
407 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
408 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1);
409 break;
410 case V4L2_FIELD_NONE:
411 default:
412 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n",
413 __func__);
414 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
415 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0);
416 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
417 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0);
418 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
419 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1);
420 break;
421 }
422 break;
423 case V4L2_PIX_FMT_YUYV:
424 default:
425 switch (dst_q_data->field) {
426 case V4L2_FIELD_INTERLACED_TB:
427 case V4L2_FIELD_INTERLACED_BT:
428 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n",
429 __func__);
430 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
431 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1);
432 break;
433 case V4L2_FIELD_NONE:
434 default:
435 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n",
436 __func__);
437 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
438 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1);
439 break;
440 }
441 break;
442 }
443
444 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__);
445}
446
447
448
449
450static int vidioc_querycap(struct file *file, void *priv,
451 struct v4l2_capability *cap)
452{
453 strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
454 strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
455 strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card));
456
457
458
459
460
461 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
462 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
463 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
464
465 return 0;
466}
467
468static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
469{
470 int i, num;
471 struct deinterlace_fmt *fmt;
472
473 num = 0;
474
475 for (i = 0; i < NUM_FORMATS; ++i) {
476 if (formats[i].types & type) {
477
478 if (num == f->index)
479 break;
480
481
482 ++num;
483 }
484 }
485
486 if (i < NUM_FORMATS) {
487
488 fmt = &formats[i];
489 strlcpy(f->description, fmt->name, sizeof(f->description));
490 f->pixelformat = fmt->fourcc;
491 return 0;
492 }
493
494
495 return -EINVAL;
496}
497
498static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
499 struct v4l2_fmtdesc *f)
500{
501 return enum_fmt(f, MEM2MEM_CAPTURE);
502}
503
504static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
505 struct v4l2_fmtdesc *f)
506{
507 return enum_fmt(f, MEM2MEM_OUTPUT);
508}
509
510static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
511{
512 struct vb2_queue *vq;
513 struct deinterlace_q_data *q_data;
514
515 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
516 if (!vq)
517 return -EINVAL;
518
519 q_data = get_q_data(f->type);
520
521 f->fmt.pix.width = q_data->width;
522 f->fmt.pix.height = q_data->height;
523 f->fmt.pix.field = q_data->field;
524 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
525
526 switch (q_data->fmt->fourcc) {
527 case V4L2_PIX_FMT_YUV420:
528 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
529 break;
530 case V4L2_PIX_FMT_YUYV:
531 default:
532 f->fmt.pix.bytesperline = q_data->width * 2;
533 }
534
535 f->fmt.pix.sizeimage = q_data->sizeimage;
536 f->fmt.pix.colorspace = ctx->colorspace;
537
538 return 0;
539}
540
541static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
542 struct v4l2_format *f)
543{
544 return vidioc_g_fmt(priv, f);
545}
546
547static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
548 struct v4l2_format *f)
549{
550 return vidioc_g_fmt(priv, f);
551}
552
553static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)
554{
555 switch (f->fmt.pix.pixelformat) {
556 case V4L2_PIX_FMT_YUV420:
557 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
558 break;
559 case V4L2_PIX_FMT_YUYV:
560 default:
561 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
562 }
563 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
564
565 return 0;
566}
567
568static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
569 struct v4l2_format *f)
570{
571 struct deinterlace_fmt *fmt;
572 struct deinterlace_ctx *ctx = priv;
573
574 fmt = find_format(f);
575 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))
576 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
577
578 f->fmt.pix.colorspace = ctx->colorspace;
579
580 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&
581 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&
582 f->fmt.pix.field != V4L2_FIELD_NONE)
583 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
584
585 return vidioc_try_fmt(f, fmt);
586}
587
588static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
589 struct v4l2_format *f)
590{
591 struct deinterlace_fmt *fmt;
592
593 fmt = find_format(f);
594 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))
595 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
596
597 if (!f->fmt.pix.colorspace)
598 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
599
600 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&
601 f->fmt.pix.field != V4L2_FIELD_SEQ_BT)
602 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
603
604 return vidioc_try_fmt(f, fmt);
605}
606
607static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
608{
609 struct deinterlace_q_data *q_data;
610 struct vb2_queue *vq;
611
612 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
613 if (!vq)
614 return -EINVAL;
615
616 q_data = get_q_data(f->type);
617 if (!q_data)
618 return -EINVAL;
619
620 if (vb2_is_busy(vq)) {
621 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
622 return -EBUSY;
623 }
624
625 q_data->fmt = find_format(f);
626 if (!q_data->fmt) {
627 v4l2_err(&ctx->dev->v4l2_dev,
628 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",
629 f->type, f->fmt.pix.width, f->fmt.pix.height,
630 f->fmt.pix.pixelformat, f->fmt.pix.field);
631 return -EINVAL;
632 }
633
634 q_data->width = f->fmt.pix.width;
635 q_data->height = f->fmt.pix.height;
636 q_data->field = f->fmt.pix.field;
637
638 switch (f->fmt.pix.pixelformat) {
639 case V4L2_PIX_FMT_YUV420:
640 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
641 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;
642 break;
643 case V4L2_PIX_FMT_YUYV:
644 default:
645 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
646 q_data->sizeimage = q_data->width * q_data->height * 2;
647 }
648
649 dprintk(ctx->dev,
650 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
651 f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
652 q_data->field);
653
654 return 0;
655}
656
657static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
658 struct v4l2_format *f)
659{
660 int ret;
661
662 ret = vidioc_try_fmt_vid_cap(file, priv, f);
663 if (ret)
664 return ret;
665 return vidioc_s_fmt(priv, f);
666}
667
668static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
669 struct v4l2_format *f)
670{
671 struct deinterlace_ctx *ctx = priv;
672 int ret;
673
674 ret = vidioc_try_fmt_vid_out(file, priv, f);
675 if (ret)
676 return ret;
677
678 ret = vidioc_s_fmt(priv, f);
679 if (!ret)
680 ctx->colorspace = f->fmt.pix.colorspace;
681
682 return ret;
683}
684
685static int vidioc_reqbufs(struct file *file, void *priv,
686 struct v4l2_requestbuffers *reqbufs)
687{
688 struct deinterlace_ctx *ctx = priv;
689
690 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
691}
692
693static int vidioc_querybuf(struct file *file, void *priv,
694 struct v4l2_buffer *buf)
695{
696 struct deinterlace_ctx *ctx = priv;
697
698 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
699}
700
701static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
702{
703 struct deinterlace_ctx *ctx = priv;
704
705 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
706}
707
708static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
709{
710 struct deinterlace_ctx *ctx = priv;
711
712 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
713}
714
715static int vidioc_streamon(struct file *file, void *priv,
716 enum v4l2_buf_type type)
717{
718 struct deinterlace_q_data *s_q_data, *d_q_data;
719 struct deinterlace_ctx *ctx = priv;
720
721 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
722 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
723
724
725 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {
726 v4l2_err(&ctx->dev->v4l2_dev,
727 "src and dst formats don't match.\n");
728 return -EINVAL;
729 }
730
731
732 switch (s_q_data->field) {
733 case V4L2_FIELD_SEQ_BT:
734 if (d_q_data->field != V4L2_FIELD_NONE &&
735 d_q_data->field != V4L2_FIELD_INTERLACED_BT) {
736 v4l2_err(&ctx->dev->v4l2_dev,
737 "src and dst field conversion [(%d)->(%d)] not supported.\n",
738 s_q_data->field, d_q_data->field);
739 return -EINVAL;
740 }
741 break;
742 case V4L2_FIELD_SEQ_TB:
743 if (d_q_data->field != V4L2_FIELD_NONE &&
744 d_q_data->field != V4L2_FIELD_INTERLACED_TB) {
745 v4l2_err(&ctx->dev->v4l2_dev,
746 "src and dst field conversion [(%d)->(%d)] not supported.\n",
747 s_q_data->field, d_q_data->field);
748 return -EINVAL;
749 }
750 break;
751 default:
752 return -EINVAL;
753 }
754
755 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
756}
757
758static int vidioc_streamoff(struct file *file, void *priv,
759 enum v4l2_buf_type type)
760{
761 struct deinterlace_ctx *ctx = priv;
762
763 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
764}
765
766static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
767 .vidioc_querycap = vidioc_querycap,
768
769 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
770 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
771 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
772 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
773
774 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
775 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
776 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
777 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
778
779 .vidioc_reqbufs = vidioc_reqbufs,
780 .vidioc_querybuf = vidioc_querybuf,
781
782 .vidioc_qbuf = vidioc_qbuf,
783 .vidioc_dqbuf = vidioc_dqbuf,
784
785 .vidioc_streamon = vidioc_streamon,
786 .vidioc_streamoff = vidioc_streamoff,
787};
788
789
790
791
792
793struct vb2_dc_conf {
794 struct device *dev;
795};
796
797static int deinterlace_queue_setup(struct vb2_queue *vq,
798 const struct v4l2_format *fmt,
799 unsigned int *nbuffers, unsigned int *nplanes,
800 unsigned int sizes[], void *alloc_ctxs[])
801{
802 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
803 struct deinterlace_q_data *q_data;
804 unsigned int size, count = *nbuffers;
805
806 q_data = get_q_data(vq->type);
807
808 switch (q_data->fmt->fourcc) {
809 case V4L2_PIX_FMT_YUV420:
810 size = q_data->width * q_data->height * 3 / 2;
811 break;
812 case V4L2_PIX_FMT_YUYV:
813 default:
814 size = q_data->width * q_data->height * 2;
815 }
816
817 *nplanes = 1;
818 *nbuffers = count;
819 sizes[0] = size;
820
821 alloc_ctxs[0] = ctx->dev->alloc_ctx;
822
823 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
824
825 return 0;
826}
827
828static int deinterlace_buf_prepare(struct vb2_buffer *vb)
829{
830 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
831 struct deinterlace_q_data *q_data;
832
833 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
834
835 q_data = get_q_data(vb->vb2_queue->type);
836
837 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
838 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
839 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
840 return -EINVAL;
841 }
842
843 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
844
845 return 0;
846}
847
848static void deinterlace_buf_queue(struct vb2_buffer *vb)
849{
850 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
851 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
852}
853
854static struct vb2_ops deinterlace_qops = {
855 .queue_setup = deinterlace_queue_setup,
856 .buf_prepare = deinterlace_buf_prepare,
857 .buf_queue = deinterlace_buf_queue,
858};
859
860static int queue_init(void *priv, struct vb2_queue *src_vq,
861 struct vb2_queue *dst_vq)
862{
863 struct deinterlace_ctx *ctx = priv;
864 int ret;
865
866 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
867 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
868 src_vq->drv_priv = ctx;
869 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
870 src_vq->ops = &deinterlace_qops;
871 src_vq->mem_ops = &vb2_dma_contig_memops;
872 src_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
873 q_data[V4L2_M2M_SRC].fmt = &formats[0];
874 q_data[V4L2_M2M_SRC].width = 640;
875 q_data[V4L2_M2M_SRC].height = 480;
876 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;
877 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;
878
879 ret = vb2_queue_init(src_vq);
880 if (ret)
881 return ret;
882
883 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
884 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
885 dst_vq->drv_priv = ctx;
886 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
887 dst_vq->ops = &deinterlace_qops;
888 dst_vq->mem_ops = &vb2_dma_contig_memops;
889 dst_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
890 q_data[V4L2_M2M_DST].fmt = &formats[0];
891 q_data[V4L2_M2M_DST].width = 640;
892 q_data[V4L2_M2M_DST].height = 480;
893 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
894 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
895
896 return vb2_queue_init(dst_vq);
897}
898
899
900
901
902static int deinterlace_open(struct file *file)
903{
904 struct deinterlace_dev *pcdev = video_drvdata(file);
905 struct deinterlace_ctx *ctx = NULL;
906
907 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
908 if (!ctx)
909 return -ENOMEM;
910
911 file->private_data = ctx;
912 ctx->dev = pcdev;
913
914 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
915 if (IS_ERR(ctx->m2m_ctx)) {
916 int ret = PTR_ERR(ctx->m2m_ctx);
917
918 kfree(ctx);
919 return ret;
920 }
921
922 ctx->xt = kzalloc(sizeof(struct dma_async_tx_descriptor) +
923 sizeof(struct data_chunk), GFP_KERNEL);
924 if (!ctx->xt) {
925 kfree(ctx);
926 return -ENOMEM;
927 }
928
929 ctx->colorspace = V4L2_COLORSPACE_REC709;
930
931 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
932
933 return 0;
934}
935
936static int deinterlace_release(struct file *file)
937{
938 struct deinterlace_dev *pcdev = video_drvdata(file);
939 struct deinterlace_ctx *ctx = file->private_data;
940
941 dprintk(pcdev, "Releasing instance %p\n", ctx);
942
943 v4l2_m2m_ctx_release(ctx->m2m_ctx);
944 kfree(ctx->xt);
945 kfree(ctx);
946
947 return 0;
948}
949
950static unsigned int deinterlace_poll(struct file *file,
951 struct poll_table_struct *wait)
952{
953 struct deinterlace_ctx *ctx = file->private_data;
954 int ret;
955
956 deinterlace_lock(ctx);
957 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
958 deinterlace_unlock(ctx);
959
960 return ret;
961}
962
963static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
964{
965 struct deinterlace_ctx *ctx = file->private_data;
966
967 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
968}
969
970static const struct v4l2_file_operations deinterlace_fops = {
971 .owner = THIS_MODULE,
972 .open = deinterlace_open,
973 .release = deinterlace_release,
974 .poll = deinterlace_poll,
975 .unlocked_ioctl = video_ioctl2,
976 .mmap = deinterlace_mmap,
977};
978
979static struct video_device deinterlace_videodev = {
980 .name = MEM2MEM_NAME,
981 .fops = &deinterlace_fops,
982 .ioctl_ops = &deinterlace_ioctl_ops,
983 .minor = -1,
984 .release = video_device_release,
985 .vfl_dir = VFL_DIR_M2M,
986};
987
988static struct v4l2_m2m_ops m2m_ops = {
989 .device_run = deinterlace_device_run,
990 .job_ready = deinterlace_job_ready,
991 .job_abort = deinterlace_job_abort,
992 .lock = deinterlace_lock,
993 .unlock = deinterlace_unlock,
994};
995
996static int deinterlace_probe(struct platform_device *pdev)
997{
998 struct deinterlace_dev *pcdev;
999 struct video_device *vfd;
1000 dma_cap_mask_t mask;
1001 int ret = 0;
1002
1003 pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
1004 if (!pcdev)
1005 return -ENOMEM;
1006
1007 spin_lock_init(&pcdev->irqlock);
1008
1009 dma_cap_zero(mask);
1010 dma_cap_set(DMA_INTERLEAVE, mask);
1011 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
1012 if (!pcdev->dma_chan)
1013 goto free_dev;
1014
1015 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
1016 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n");
1017 goto rel_dma;
1018 }
1019
1020 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
1021 if (ret)
1022 goto rel_dma;
1023
1024 atomic_set(&pcdev->busy, 0);
1025 mutex_init(&pcdev->dev_mutex);
1026
1027 vfd = video_device_alloc();
1028 if (!vfd) {
1029 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
1030 ret = -ENOMEM;
1031 goto unreg_dev;
1032 }
1033
1034 *vfd = deinterlace_videodev;
1035 vfd->lock = &pcdev->dev_mutex;
1036 vfd->v4l2_dev = &pcdev->v4l2_dev;
1037
1038 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1039 if (ret) {
1040 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
1041 goto rel_vdev;
1042 }
1043
1044 video_set_drvdata(vfd, pcdev);
1045 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
1046 pcdev->vfd = vfd;
1047 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
1048 " Device registered as /dev/video%d\n", vfd->num);
1049
1050 platform_set_drvdata(pdev, pcdev);
1051
1052 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1053 if (IS_ERR(pcdev->alloc_ctx)) {
1054 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
1055 ret = PTR_ERR(pcdev->alloc_ctx);
1056 goto err_ctx;
1057 }
1058
1059 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1060 if (IS_ERR(pcdev->m2m_dev)) {
1061 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
1062 ret = PTR_ERR(pcdev->m2m_dev);
1063 goto err_m2m;
1064 }
1065
1066 return 0;
1067
1068 v4l2_m2m_release(pcdev->m2m_dev);
1069err_m2m:
1070 video_unregister_device(pcdev->vfd);
1071err_ctx:
1072 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1073rel_vdev:
1074 video_device_release(vfd);
1075unreg_dev:
1076 v4l2_device_unregister(&pcdev->v4l2_dev);
1077rel_dma:
1078 dma_release_channel(pcdev->dma_chan);
1079free_dev:
1080 kfree(pcdev);
1081
1082 return ret;
1083}
1084
1085static int deinterlace_remove(struct platform_device *pdev)
1086{
1087 struct deinterlace_dev *pcdev =
1088 (struct deinterlace_dev *)platform_get_drvdata(pdev);
1089
1090 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
1091 v4l2_m2m_release(pcdev->m2m_dev);
1092 video_unregister_device(pcdev->vfd);
1093 v4l2_device_unregister(&pcdev->v4l2_dev);
1094 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1095 dma_release_channel(pcdev->dma_chan);
1096 kfree(pcdev);
1097
1098 return 0;
1099}
1100
1101static struct platform_driver deinterlace_pdrv = {
1102 .probe = deinterlace_probe,
1103 .remove = deinterlace_remove,
1104 .driver = {
1105 .name = MEM2MEM_NAME,
1106 .owner = THIS_MODULE,
1107 },
1108};
1109module_platform_driver(deinterlace_pdrv);
1110
1111
