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[media] davinci: vpif: capture/display: fix race condition
[deliverable/linux.git] / drivers / media / platform / m2m-deinterlace.c
CommitLineData
8f0755c0
JM		 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
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 = true;
32module_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
43struct deinterlace_fmt {
44 char *name;
45 u32 fourcc;
46 /* Types the format can be used for */
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/* Per-queue, driver-specific private data */
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/* Source and destination queue data */
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 /* 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 */
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 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
211 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
212
213 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
214
215 dprintk(pcdev, "dma transfers completed.\n");
216}
217
218static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,
219 int do_callback)
220{
221 struct deinterlace_q_data *s_q_data, *d_q_data;
222 struct vb2_buffer *src_buf, *dst_buf;
223 struct deinterlace_dev *pcdev = ctx->dev;
224 struct dma_chan *chan = pcdev->dma_chan;
225 struct dma_device *dmadev = chan->device;
226 struct dma_async_tx_descriptor *tx;
227 unsigned int s_width, s_height;
228 unsigned int d_width, d_height;
229 unsigned int d_size, s_size;
230 dma_addr_t p_in, p_out;
231 enum dma_ctrl_flags flags;
232
233 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
234 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
235
236 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
237 s_width = s_q_data->width;
238 s_height = s_q_data->height;
239 s_size = s_width * s_height;
240
241 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
242 d_width = d_q_data->width;
243 d_height = d_q_data->height;
244 d_size = d_width * d_height;
245
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");
251 return;
252 }
253
254 switch (op) {
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;
261 break;
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;
268 break;
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;
275 break;
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;
282 break;
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;
289 break;
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;
296 break;
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;
303 break;
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;
310 break;
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;
317 break;
318 case YUYV_DMA_ODD:
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;
324 break;
325 case YUYV_DMA_EVEN:
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;
331 break;
332 case YUYV_DMA_EVEN_DOUBLING:
333 default:
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;
339 break;
340 }
341
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 |
348 DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SKIP_SRC_UNMAP;
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",
84b3bd46
MCC		 365 ctx->cookie, (unsigned)p_in, (unsigned)p_out,
366 s_size * 3/2);
8f0755c0
JM		 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 * 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 */
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 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
460 | V4L2_CAP_STREAMING;
461 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
462
463 return 0;
464}
465
466static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
467{
468 int i, num;
469 struct deinterlace_fmt *fmt;
470
471 num = 0;
472
473 for (i = 0; i < NUM_FORMATS; ++i) {
474 if (formats[i].types & type) {
475 /* index-th format of type type found ? */
476 if (num == f->index)
477 break;
478 /* Correct type but haven't reached our index yet,
479 * just increment per-type index */
480 ++num;
481 }
482 }
483
484 if (i < NUM_FORMATS) {
485 /* Format found */
486 fmt = &formats[i];
487 strlcpy(f->description, fmt->name, sizeof(f->description));
488 f->pixelformat = fmt->fourcc;
489 return 0;
490 }
491
492 /* Format not found */
493 return -EINVAL;
494}
495
496static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
497 struct v4l2_fmtdesc *f)
498{
499 return enum_fmt(f, MEM2MEM_CAPTURE);
500}
501
502static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
503 struct v4l2_fmtdesc *f)
504{
505 return enum_fmt(f, MEM2MEM_OUTPUT);
506}
507
508static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
509{
510 struct vb2_queue *vq;
511 struct deinterlace_q_data *q_data;
512
513 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
514 if (!vq)
515 return -EINVAL;
516
517 q_data = get_q_data(f->type);
518
519 f->fmt.pix.width = q_data->width;
520 f->fmt.pix.height = q_data->height;
521 f->fmt.pix.field = q_data->field;
522 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
523
524 switch (q_data->fmt->fourcc) {
525 case V4L2_PIX_FMT_YUV420:
526 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
527 break;
528 case V4L2_PIX_FMT_YUYV:
529 default:
530 f->fmt.pix.bytesperline = q_data->width * 2;
531 }
532
533 f->fmt.pix.sizeimage = q_data->sizeimage;
534 f->fmt.pix.colorspace = ctx->colorspace;
535
536 return 0;
537}
538
539static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
540 struct v4l2_format *f)
541{
542 return vidioc_g_fmt(priv, f);
543}
544
545static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
546 struct v4l2_format *f)
547{
548 return vidioc_g_fmt(priv, f);
549}
550
551static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)
552{
553 switch (f->fmt.pix.pixelformat) {
554 case V4L2_PIX_FMT_YUV420:
555 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
556 break;
557 case V4L2_PIX_FMT_YUYV:
558 default:
559 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
560 }
561 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
562
563 return 0;
564}
565
566static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
567 struct v4l2_format *f)
568{
569 struct deinterlace_fmt *fmt;
570 struct deinterlace_ctx *ctx = priv;
571
572 fmt = find_format(f);
573 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))
574 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
575
576 f->fmt.pix.colorspace = ctx->colorspace;
577
578 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&
579 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&
580 f->fmt.pix.field != V4L2_FIELD_NONE)
581 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
582
583 return vidioc_try_fmt(f, fmt);
584}
585
586static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
587 struct v4l2_format *f)
588{
589 struct deinterlace_fmt *fmt;
590
591 fmt = find_format(f);
592 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))
593 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
594
595 if (!f->fmt.pix.colorspace)
596 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
597
598 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&
599 f->fmt.pix.field != V4L2_FIELD_SEQ_BT)
600 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
601
602 return vidioc_try_fmt(f, fmt);
603}
604
605static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
606{
607 struct deinterlace_q_data *q_data;
608 struct vb2_queue *vq;
609
610 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
611 if (!vq)
612 return -EINVAL;
613
614 q_data = get_q_data(f->type);
615 if (!q_data)
616 return -EINVAL;
617
618 if (vb2_is_busy(vq)) {
619 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
620 return -EBUSY;
621 }
622
623 q_data->fmt = find_format(f);
624 if (!q_data->fmt) {
625 v4l2_err(&ctx->dev->v4l2_dev,
626 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",
627 f->type, f->fmt.pix.width, f->fmt.pix.height,
628 f->fmt.pix.pixelformat, f->fmt.pix.field);
629 return -EINVAL;
630 }
631
632 q_data->width = f->fmt.pix.width;
633 q_data->height = f->fmt.pix.height;
634 q_data->field = f->fmt.pix.field;
635
636 switch (f->fmt.pix.pixelformat) {
637 case V4L2_PIX_FMT_YUV420:
638 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
639 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;
640 break;
641 case V4L2_PIX_FMT_YUYV:
642 default:
643 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
644 q_data->sizeimage = q_data->width * q_data->height * 2;
645 }
646
647 dprintk(ctx->dev,
648 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
649 f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
650 q_data->field);
651
652 return 0;
653}
654
655static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
656 struct v4l2_format *f)
657{
658 int ret;
659
660 ret = vidioc_try_fmt_vid_cap(file, priv, f);
661 if (ret)
662 return ret;
663 return vidioc_s_fmt(priv, f);
664}
665
666static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
667 struct v4l2_format *f)
668{
669 struct deinterlace_ctx *ctx = priv;
670 int ret;
671
672 ret = vidioc_try_fmt_vid_out(file, priv, f);
673 if (ret)
674 return ret;
675
676 ret = vidioc_s_fmt(priv, f);
677 if (!ret)
678 ctx->colorspace = f->fmt.pix.colorspace;
679
680 return ret;
681}
682
683static int vidioc_reqbufs(struct file *file, void *priv,
684 struct v4l2_requestbuffers *reqbufs)
685{
686 struct deinterlace_ctx *ctx = priv;
687
688 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
689}
690
691static int vidioc_querybuf(struct file *file, void *priv,
692 struct v4l2_buffer *buf)
693{
694 struct deinterlace_ctx *ctx = priv;
695
696 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
697}
698
699static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
700{
701 struct deinterlace_ctx *ctx = priv;
702
703 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
704}
705
706static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
707{
708 struct deinterlace_ctx *ctx = priv;
709
710 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
711}
712
713static int vidioc_streamon(struct file *file, void *priv,
714 enum v4l2_buf_type type)
715{
716 struct deinterlace_q_data *s_q_data, *d_q_data;
717 struct deinterlace_ctx *ctx = priv;
718
719 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
720 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
721
722 /* Check that src and dst queues have the same pix format */
723 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {
724 v4l2_err(&ctx->dev->v4l2_dev,
725 "src and dst formats don't match.\n");
726 return -EINVAL;
727 }
728
729 /* Check that input and output deinterlacing types are compatible */
730 switch (s_q_data->field) {
731 case V4L2_FIELD_SEQ_BT:
732 if (d_q_data->field != V4L2_FIELD_NONE &&
733 d_q_data->field != V4L2_FIELD_INTERLACED_BT) {
734 v4l2_err(&ctx->dev->v4l2_dev,
735 "src and dst field conversion [(%d)->(%d)] not supported.\n",
736 s_q_data->field, d_q_data->field);
737 return -EINVAL;
738 }
739 break;
740 case V4L2_FIELD_SEQ_TB:
741 if (d_q_data->field != V4L2_FIELD_NONE &&
742 d_q_data->field != V4L2_FIELD_INTERLACED_TB) {
743 v4l2_err(&ctx->dev->v4l2_dev,
744 "src and dst field conversion [(%d)->(%d)] not supported.\n",
745 s_q_data->field, d_q_data->field);
746 return -EINVAL;
747 }
748 break;
749 default:
750 return -EINVAL;
751 }
752
753 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
754}
755
756static int vidioc_streamoff(struct file *file, void *priv,
757 enum v4l2_buf_type type)
758{
759 struct deinterlace_ctx *ctx = priv;
760
761 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
762}
763
764static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
765 .vidioc_querycap = vidioc_querycap,
766
767 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
768 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
769 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
770 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
771
772 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
773 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
774 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
775 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
776
777 .vidioc_reqbufs = vidioc_reqbufs,
778 .vidioc_querybuf = vidioc_querybuf,
779
780 .vidioc_qbuf = vidioc_qbuf,
781 .vidioc_dqbuf = vidioc_dqbuf,
782
783 .vidioc_streamon = vidioc_streamon,
784 .vidioc_streamoff = vidioc_streamoff,
785};
786
787
788/*
789 * Queue operations
790 */
791struct vb2_dc_conf {
792 struct device *dev;
793};
794
795static int deinterlace_queue_setup(struct vb2_queue *vq,
796 const struct v4l2_format *fmt,
797 unsigned int *nbuffers, unsigned int *nplanes,
798 unsigned int sizes[], void *alloc_ctxs[])
799{
800 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
801 struct deinterlace_q_data *q_data;
802 unsigned int size, count = *nbuffers;
803
804 q_data = get_q_data(vq->type);
805
806 switch (q_data->fmt->fourcc) {
807 case V4L2_PIX_FMT_YUV420:
808 size = q_data->width * q_data->height * 3 / 2;
809 break;
810 case V4L2_PIX_FMT_YUYV:
811 default:
812 size = q_data->width * q_data->height * 2;
813 }
814
815 *nplanes = 1;
816 *nbuffers = count;
817 sizes[0] = size;
818
819 alloc_ctxs[0] = ctx->dev->alloc_ctx;
820
821 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
822
823 return 0;
824}
825
826static int deinterlace_buf_prepare(struct vb2_buffer *vb)
827{
828 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
829 struct deinterlace_q_data *q_data;
830
831 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
832
833 q_data = get_q_data(vb->vb2_queue->type);
834
835 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
836 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
837 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
838 return -EINVAL;
839 }
840
841 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
842
843 return 0;
844}
845
846static void deinterlace_buf_queue(struct vb2_buffer *vb)
847{
848 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
849 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
850}
851
852static struct vb2_ops deinterlace_qops = {
853 .queue_setup = deinterlace_queue_setup,
854 .buf_prepare = deinterlace_buf_prepare,
855 .buf_queue = deinterlace_buf_queue,
856};
857
858static int queue_init(void *priv, struct vb2_queue *src_vq,
859 struct vb2_queue *dst_vq)
860{
861 struct deinterlace_ctx *ctx = priv;
862 int ret;
863
8f0755c0
JM		 864 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
865 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
866 src_vq->drv_priv = ctx;
867 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
868 src_vq->ops = &deinterlace_qops;
869 src_vq->mem_ops = &vb2_dma_contig_memops;
870 q_data[V4L2_M2M_SRC].fmt = &formats[0];
871 q_data[V4L2_M2M_SRC].width = 640;
872 q_data[V4L2_M2M_SRC].height = 480;
873 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;
874 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;
875
876 ret = vb2_queue_init(src_vq);
877 if (ret)
878 return ret;
879
8f0755c0
JM		 880 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
881 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
882 dst_vq->drv_priv = ctx;
883 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
884 dst_vq->ops = &deinterlace_qops;
885 dst_vq->mem_ops = &vb2_dma_contig_memops;
886 q_data[V4L2_M2M_DST].fmt = &formats[0];
887 q_data[V4L2_M2M_DST].width = 640;
888 q_data[V4L2_M2M_DST].height = 480;
889 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
890 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
891
892 return vb2_queue_init(dst_vq);
893}
894
895/*
896 * File operations
897 */
898static int deinterlace_open(struct file *file)
899{
900 struct deinterlace_dev *pcdev = video_drvdata(file);
901 struct deinterlace_ctx *ctx = NULL;
902
903 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
904 if (!ctx)
905 return -ENOMEM;
906
907 file->private_data = ctx;
908 ctx->dev = pcdev;
909
910 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
911 if (IS_ERR(ctx->m2m_ctx)) {
912 int ret = PTR_ERR(ctx->m2m_ctx);
913
914 kfree(ctx);
915 return ret;
916 }
917
918 ctx->xt = kzalloc(sizeof(struct dma_async_tx_descriptor) +
919 sizeof(struct data_chunk), GFP_KERNEL);
920 if (!ctx->xt) {
921 int ret = PTR_ERR(ctx->xt);
922
923 kfree(ctx);
924 return ret;
925 }
926
927 ctx->colorspace = V4L2_COLORSPACE_REC709;
928
929 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
930
931 return 0;
932}
933
934static int deinterlace_release(struct file *file)
935{
936 struct deinterlace_dev *pcdev = video_drvdata(file);
937 struct deinterlace_ctx *ctx = file->private_data;
938
939 dprintk(pcdev, "Releasing instance %p\n", ctx);
940
941 v4l2_m2m_ctx_release(ctx->m2m_ctx);
942 kfree(ctx->xt);
943 kfree(ctx);
944
945 return 0;
946}
947
948static unsigned int deinterlace_poll(struct file *file,
949 struct poll_table_struct *wait)
950{
951 struct deinterlace_ctx *ctx = file->private_data;
952 int ret;
953
954 deinterlace_lock(ctx);
955 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
956 deinterlace_unlock(ctx);
957
958 return ret;
959}
960
961static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
962{
963 struct deinterlace_ctx *ctx = file->private_data;
964
965 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
966}
967
968static const struct v4l2_file_operations deinterlace_fops = {
969 .owner = THIS_MODULE,
970 .open = deinterlace_open,
971 .release = deinterlace_release,
972 .poll = deinterlace_poll,
973 .unlocked_ioctl = video_ioctl2,
974 .mmap = deinterlace_mmap,
975};
976
977static struct video_device deinterlace_videodev = {
978 .name = MEM2MEM_NAME,
979 .fops = &deinterlace_fops,
980 .ioctl_ops = &deinterlace_ioctl_ops,
981 .minor = -1,
982 .release = video_device_release,
954f340f 983 .vfl_dir = VFL_DIR_M2M,
8f0755c0
JM		 984};
985
986static struct v4l2_m2m_ops m2m_ops = {
987 .device_run = deinterlace_device_run,
988 .job_ready = deinterlace_job_ready,
989 .job_abort = deinterlace_job_abort,
990 .lock = deinterlace_lock,
991 .unlock = deinterlace_unlock,
992};
993
994static int deinterlace_probe(struct platform_device *pdev)
995{
996 struct deinterlace_dev *pcdev;
997 struct video_device *vfd;
998 dma_cap_mask_t mask;
999 int ret = 0;
1000
1001 pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
1002 if (!pcdev)
1003 return -ENOMEM;
1004
1005 spin_lock_init(&pcdev->irqlock);
1006
1007 dma_cap_zero(mask);
1008 dma_cap_set(DMA_INTERLEAVE, mask);
1009 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
1010 if (!pcdev->dma_chan)
1011 goto free_dev;
1012
1013 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
1014 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n");
1015 goto rel_dma;
1016 }
1017
1018 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
1019 if (ret)
1020 goto rel_dma;
1021
1022 atomic_set(&pcdev->busy, 0);
1023 mutex_init(&pcdev->dev_mutex);
1024
1025 vfd = video_device_alloc();
1026 if (!vfd) {
1027 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
1028 ret = -ENOMEM;
1029 goto unreg_dev;
1030 }
1031
1032 *vfd = deinterlace_videodev;
1033 vfd->lock = &pcdev->dev_mutex;
1034
1035 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1036 if (ret) {
1037 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
1038 goto rel_vdev;
1039 }
1040
1041 video_set_drvdata(vfd, pcdev);
1042 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
1043 pcdev->vfd = vfd;
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 v4l2_m2m_release(pcdev->m2m_dev);
1066err_m2m:
1067 video_unregister_device(pcdev->vfd);
1068err_ctx:
1069 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1070rel_vdev:
1071 video_device_release(vfd);
1072unreg_dev:
1073 v4l2_device_unregister(&pcdev->v4l2_dev);
1074rel_dma:
1075 dma_release_channel(pcdev->dma_chan);
1076free_dev:
1077 kfree(pcdev);
1078
1079 return ret;
1080}
1081
1082static int deinterlace_remove(struct platform_device *pdev)
1083{
1084 struct deinterlace_dev *pcdev =
1085 (struct deinterlace_dev *)platform_get_drvdata(pdev);
1086
1087 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
1088 v4l2_m2m_release(pcdev->m2m_dev);
1089 video_unregister_device(pcdev->vfd);
1090 v4l2_device_unregister(&pcdev->v4l2_dev);
1091 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1092 dma_release_channel(pcdev->dma_chan);
1093 kfree(pcdev);
1094
1095 return 0;
1096}
1097
1098static struct platform_driver deinterlace_pdrv = {
1099 .probe = deinterlace_probe,
1100 .remove = deinterlace_remove,
1101 .driver = {
1102 .name = MEM2MEM_NAME,
1103 .owner = THIS_MODULE,
1104 },
1105};
1106
1107static void __exit deinterlace_exit(void)
1108{
1109 platform_driver_unregister(&deinterlace_pdrv);
1110}
1111
1112static int __init deinterlace_init(void)
1113{
1114 return platform_driver_register(&deinterlace_pdrv);
1115}
1116
1117module_init(deinterlace_init);
1118module_exit(deinterlace_exit);
1119
Linux kernel - Deliverables
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