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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / media / platform / m2m-deinterlace.c
blob7383818c2be6cec6bf841abe2bd366f10151438a
1 /*
2 * V4L2 deinterlacing support.
3 *
4 * Copyright (c) 2012 Vista Silicon S.L.
5 * Javier Martin <javier.martin@vista-silicon.com>
6 *
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
11 */
12
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
26 MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine");
27 MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
28 MODULE_LICENSE("GPL");
29 MODULE_VERSION("0.0.1");
30
31 static bool debug;
32 module_param(debug, bool, 0644);
33
34 /* Flags that indicate a format can be used for capture/output */
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
43 struct deinterlace_fmt {
44 char *name;
45 u32 fourcc;
46 /* Types the format can be used for */
47 u32 types;
48 };
49
50 static 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 /* Per-queue, driver-specific private data */
66 struct 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
74 enum {
75 V4L2_M2M_SRC = 0,
76 V4L2_M2M_DST = 1,
77 };
78
79 enum {
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 /* Source and destination queue data */
95 static struct deinterlace_q_data q_data[2];
96
97 static 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
110 static 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
128 struct 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
142 struct deinterlace_ctx {
143 struct deinterlace_dev *dev;
144
145 /* Abort requested by m2m */
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 * mem2mem callbacks
155 */
156 static 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
173 static 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
185 static 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
192 static 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
199 static 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->vb2_buf.timestamp = src_vb->vb2_buf.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
224 static 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 /* Common parameters for al transfers */
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
373 static 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 * 4 possible field conversions are possible at the moment:
386 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB:
387 * two separate fields in the same input buffer are interlaced
388 * in the output buffer using weaving. Top field comes first.
389 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE:
390 * top field from the input buffer is copied to the output buffer
391 * using line doubling. Bottom field from the input buffer is discarded.
392 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT:
393 * two separate fields in the same input buffer are interlaced
394 * in the output buffer using weaving. Bottom field comes first.
395 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE:
396 * bottom field from the input buffer is copied to the output buffer
397 * using line doubling. Top field from the input buffer is discarded.
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 * video ioctls
452 */
453 static 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 * This is only a mem-to-mem video device. The capture and output
461 * device capability flags are left only for backward compatibility
462 * and are scheduled for removal.
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
471 static 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 /* index-th format of type type found ? */
481 if (num == f->index)
482 break;
483 /* Correct type but haven't reached our index yet,
484 * just increment per-type index */
485 ++num;
486 }
487 }
488
489 if (i < NUM_FORMATS) {
490 /* Format found */
491 fmt = &formats[i];
492 strlcpy(f->description, fmt->name, sizeof(f->description));
493 f->pixelformat = fmt->fourcc;
494 return 0;
495 }
496
497 /* Format not found */
498 return -EINVAL;
499 }
500
501 static 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
507 static 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
513 static 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
544 static 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
550 static 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
556 static 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
571 static 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
591 static 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
610 static 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
660 static 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
671 static 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
688 static 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
696 static 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
704 static 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
711 static 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
718 static 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 /* Check that src and dst queues have the same pix format */
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 /* Check that input and output deinterlacing types are compatible */
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
761 static 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
769 static 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 * Queue operations
795 */
796 struct vb2_dc_conf {
797 struct device *dev;
798 };
799
800 static int deinterlace_queue_setup(struct vb2_queue *vq,
801 unsigned int *nbuffers, unsigned int *nplanes,
802 unsigned int sizes[], void *alloc_ctxs[])
803 {
804 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
805 struct deinterlace_q_data *q_data;
806 unsigned int size, count = *nbuffers;
807
808 q_data = get_q_data(vq->type);
809
810 switch (q_data->fmt->fourcc) {
811 case V4L2_PIX_FMT_YUV420:
812 size = q_data->width * q_data->height * 3 / 2;
813 break;
814 case V4L2_PIX_FMT_YUYV:
815 default:
816 size = q_data->width * q_data->height * 2;
817 }
818
819 *nplanes = 1;
820 *nbuffers = count;
821 sizes[0] = size;
822
823 alloc_ctxs[0] = ctx->dev->alloc_ctx;
824
825 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
826
827 return 0;
828 }
829
830 static int deinterlace_buf_prepare(struct vb2_buffer *vb)
831 {
832 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
833 struct deinterlace_q_data *q_data;
834
835 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
836
837 q_data = get_q_data(vb->vb2_queue->type);
838
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);
842 return -EINVAL;
843 }
844
845 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
846
847 return 0;
848 }
849
850 static void deinterlace_buf_queue(struct vb2_buffer *vb)
851 {
852 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
853 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
854
855 v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
856 }
857
858 static struct vb2_ops deinterlace_qops = {
859 .queue_setup = deinterlace_queue_setup,
860 .buf_prepare = deinterlace_buf_prepare,
861 .buf_queue = deinterlace_buf_queue,
862 };
863
864 static int queue_init(void *priv, struct vb2_queue *src_vq,
865 struct vb2_queue *dst_vq)
866 {
867 struct deinterlace_ctx *ctx = priv;
868 int ret;
869
870 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
871 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
872 src_vq->drv_priv = ctx;
873 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
874 src_vq->ops = &deinterlace_qops;
875 src_vq->mem_ops = &vb2_dma_contig_memops;
876 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
877 q_data[V4L2_M2M_SRC].fmt = &formats[0];
878 q_data[V4L2_M2M_SRC].width = 640;
879 q_data[V4L2_M2M_SRC].height = 480;
880 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;
881 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;
882
883 ret = vb2_queue_init(src_vq);
884 if (ret)
885 return ret;
886
887 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
888 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
889 dst_vq->drv_priv = ctx;
890 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
891 dst_vq->ops = &deinterlace_qops;
892 dst_vq->mem_ops = &vb2_dma_contig_memops;
893 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
894 q_data[V4L2_M2M_DST].fmt = &formats[0];
895 q_data[V4L2_M2M_DST].width = 640;
896 q_data[V4L2_M2M_DST].height = 480;
897 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
898 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
899
900 return vb2_queue_init(dst_vq);
901 }
902
903 /*
904 * File operations
905 */
906 static int deinterlace_open(struct file *file)
907 {
908 struct deinterlace_dev *pcdev = video_drvdata(file);
909 struct deinterlace_ctx *ctx = NULL;
910
911 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
912 if (!ctx)
913 return -ENOMEM;
914
915 file->private_data = ctx;
916 ctx->dev = pcdev;
917
918 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
919 if (IS_ERR(ctx->m2m_ctx)) {
920 int ret = PTR_ERR(ctx->m2m_ctx);
921
922 kfree(ctx);
923 return ret;
924 }
925
926 ctx->xt = kzalloc(sizeof(struct dma_interleaved_template) +
927 sizeof(struct data_chunk), GFP_KERNEL);
928 if (!ctx->xt) {
929 kfree(ctx);
930 return -ENOMEM;
931 }
932
933 ctx->colorspace = V4L2_COLORSPACE_REC709;
934
935 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
936
937 return 0;
938 }
939
940 static int deinterlace_release(struct file *file)
941 {
942 struct deinterlace_dev *pcdev = video_drvdata(file);
943 struct deinterlace_ctx *ctx = file->private_data;
944
945 dprintk(pcdev, "Releasing instance %p\n", ctx);
946
947 v4l2_m2m_ctx_release(ctx->m2m_ctx);
948 kfree(ctx->xt);
949 kfree(ctx);
950
951 return 0;
952 }
953
954 static unsigned int deinterlace_poll(struct file *file,
955 struct poll_table_struct *wait)
956 {
957 struct deinterlace_ctx *ctx = file->private_data;
958 int ret;
959
960 deinterlace_lock(ctx);
961 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
962 deinterlace_unlock(ctx);
963
964 return ret;
965 }
966
967 static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
968 {
969 struct deinterlace_ctx *ctx = file->private_data;
970
971 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
972 }
973
974 static const struct v4l2_file_operations deinterlace_fops = {
975 .owner = THIS_MODULE,
976 .open = deinterlace_open,
977 .release = deinterlace_release,
978 .poll = deinterlace_poll,
979 .unlocked_ioctl = video_ioctl2,
980 .mmap = deinterlace_mmap,
981 };
982
983 static struct video_device deinterlace_videodev = {
984 .name = MEM2MEM_NAME,
985 .fops = &deinterlace_fops,
986 .ioctl_ops = &deinterlace_ioctl_ops,
987 .minor = -1,
988 .release = video_device_release_empty,
989 .vfl_dir = VFL_DIR_M2M,
990 };
991
992 static struct v4l2_m2m_ops m2m_ops = {
993 .device_run = deinterlace_device_run,
994 .job_ready = deinterlace_job_ready,
995 .job_abort = deinterlace_job_abort,
996 .lock = deinterlace_lock,
997 .unlock = deinterlace_unlock,
998 };
999
1000 static int deinterlace_probe(struct platform_device *pdev)
1001 {
1002 struct deinterlace_dev *pcdev;
1003 struct video_device *vfd;
1004 dma_cap_mask_t mask;
1005 int ret = 0;
1006
1007 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
1008 if (!pcdev)
1009 return -ENOMEM;
1010
1011 spin_lock_init(&pcdev->irqlock);
1012
1013 dma_cap_zero(mask);
1014 dma_cap_set(DMA_INTERLEAVE, mask);
1015 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
1016 if (!pcdev->dma_chan)
1017 return -ENODEV;
1018
1019 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
1020 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n");
1021 goto rel_dma;
1022 }
1023
1024 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
1025 if (ret)
1026 goto rel_dma;
1027
1028 atomic_set(&pcdev->busy, 0);
1029 mutex_init(&pcdev->dev_mutex);
1030
1031 vfd = &pcdev->vfd;
1032 *vfd = deinterlace_videodev;
1033 vfd->lock = &pcdev->dev_mutex;
1034 vfd->v4l2_dev = &pcdev->v4l2_dev;
1035
1036 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1037 if (ret) {
1038 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
1039 goto unreg_dev;
1040 }
1041
1042 video_set_drvdata(vfd, pcdev);
1043 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
1044 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
1045 " Device registered as /dev/video%d\n", vfd->num);
1046
1047 platform_set_drvdata(pdev, pcdev);
1048
1049 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1050 if (IS_ERR(pcdev->alloc_ctx)) {
1051 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
1052 ret = PTR_ERR(pcdev->alloc_ctx);
1053 goto err_ctx;
1054 }
1055
1056 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1057 if (IS_ERR(pcdev->m2m_dev)) {
1058 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
1059 ret = PTR_ERR(pcdev->m2m_dev);
1060 goto err_m2m;
1061 }
1062
1063 return 0;
1064
1065 err_m2m:
1066 video_unregister_device(&pcdev->vfd);
1067 err_ctx:
1068 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1069 unreg_dev:
1070 v4l2_device_unregister(&pcdev->v4l2_dev);
1071 rel_dma:
1072 dma_release_channel(pcdev->dma_chan);
1073
1074 return ret;
1075 }
1076
1077 static int deinterlace_remove(struct platform_device *pdev)
1078 {
1079 struct deinterlace_dev *pcdev = platform_get_drvdata(pdev);
1080
1081 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
1082 v4l2_m2m_release(pcdev->m2m_dev);
1083 video_unregister_device(&pcdev->vfd);
1084 v4l2_device_unregister(&pcdev->v4l2_dev);
1085 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1086 dma_release_channel(pcdev->dma_chan);
1087
1088 return 0;
1089 }
1090
1091 static struct platform_driver deinterlace_pdrv = {
1092 .probe = deinterlace_probe,
1093 .remove = deinterlace_remove,
1094 .driver = {
1095 .name = MEM2MEM_NAME,
1096 },
1097 };
1098 module_platform_driver(deinterlace_pdrv);
1099
Linux with added FPC-III support