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[media] wl128x: Replace memcpy with struct assignment
[linux-2.6-block.git] / drivers / media / platform / m2m-deinterlace.c
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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
20272409 31static bool debug;
8f0755c0
JM		 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{
2869a318 221 struct deinterlace_q_data *s_q_data;
8f0755c0
JM		 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;
2869a318 228 unsigned int s_size;
8f0755c0
JM		 229 dma_addr_t p_in, p_out;
230 enum dma_ctrl_flags flags;
231
232 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
233 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
234
235 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
236 s_width = s_q_data->width;
237 s_height = s_q_data->height;
238 s_size = s_width * s_height;
239
8f0755c0
JM		 240 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0);
241 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0);
242 if (!p_in || !p_out) {
243 v4l2_err(&pcdev->v4l2_dev,
244 "Acquiring kernel pointers to buffers failed\n");
245 return;
246 }
247
248 switch (op) {
249 case YUV420_DMA_Y_ODD:
250 ctx->xt->numf = s_height / 2;
251 ctx->xt->sgl[0].size = s_width;
252 ctx->xt->sgl[0].icg = s_width;
253 ctx->xt->src_start = p_in;
254 ctx->xt->dst_start = p_out;
255 break;
256 case YUV420_DMA_Y_EVEN:
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 + s_size / 2;
261 ctx->xt->dst_start = p_out + s_width;
262 break;
263 case YUV420_DMA_U_ODD:
264 ctx->xt->numf = s_height / 4;
265 ctx->xt->sgl[0].size = s_width / 2;
266 ctx->xt->sgl[0].icg = s_width / 2;
267 ctx->xt->src_start = p_in + s_size;
268 ctx->xt->dst_start = p_out + s_size;
269 break;
270 case YUV420_DMA_U_EVEN:
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 + (9 * s_size) / 8;
275 ctx->xt->dst_start = p_out + s_size + s_width / 2;
276 break;
277 case YUV420_DMA_V_ODD:
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 + (5 * s_size) / 4;
282 ctx->xt->dst_start = p_out + (5 * s_size) / 4;
283 break;
284 case YUV420_DMA_V_EVEN:
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 + (11 * s_size) / 8;
289 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
290 break;
291 case YUV420_DMA_Y_ODD_DOUBLING:
292 ctx->xt->numf = s_height / 2;
293 ctx->xt->sgl[0].size = s_width;
294 ctx->xt->sgl[0].icg = s_width;
295 ctx->xt->src_start = p_in;
296 ctx->xt->dst_start = p_out + s_width;
297 break;
298 case YUV420_DMA_U_ODD_DOUBLING:
299 ctx->xt->numf = s_height / 4;
300 ctx->xt->sgl[0].size = s_width / 2;
301 ctx->xt->sgl[0].icg = s_width / 2;
302 ctx->xt->src_start = p_in + s_size;
303 ctx->xt->dst_start = p_out + s_size + s_width / 2;
304 break;
305 case YUV420_DMA_V_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 + (5 * s_size) / 4;
310 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
311 break;
312 case YUYV_DMA_ODD:
313 ctx->xt->numf = s_height / 2;
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;
317 ctx->xt->dst_start = p_out;
318 break;
319 case YUYV_DMA_EVEN:
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 + s_size;
324 ctx->xt->dst_start = p_out + s_width * 2;
325 break;
326 case YUYV_DMA_EVEN_DOUBLING:
327 default:
328 ctx->xt->numf = s_height / 2;
329 ctx->xt->sgl[0].size = s_width * 2;
330 ctx->xt->sgl[0].icg = s_width * 2;
331 ctx->xt->src_start = p_in;
332 ctx->xt->dst_start = p_out + s_width * 2;
333 break;
334 }
335
336 /* Common parameters for al transfers */
337 ctx->xt->frame_size = 1;
338 ctx->xt->dir = DMA_MEM_TO_MEM;
339 ctx->xt->src_sgl = false;
340 ctx->xt->dst_sgl = true;
341 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT |
342 DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SKIP_SRC_UNMAP;
343
344 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags);
345 if (tx == NULL) {
346 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n");
347 return;
348 }
349
350 if (do_callback) {
351 tx->callback = dma_callback;
352 tx->callback_param = ctx;
353 }
354
355 ctx->cookie = dmaengine_submit(tx);
356 if (dma_submit_error(ctx->cookie)) {
357 v4l2_warn(&pcdev->v4l2_dev,
358 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n",
84b3bd46
MCC		 359 ctx->cookie, (unsigned)p_in, (unsigned)p_out,
360 s_size * 3/2);
8f0755c0
JM		 361 return;
362 }
363
364 dma_async_issue_pending(chan);
365}
366
367static void deinterlace_device_run(void *priv)
368{
369 struct deinterlace_ctx *ctx = priv;
370 struct deinterlace_q_data *dst_q_data;
371
372 atomic_set(&ctx->dev->busy, 1);
373
374 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__);
375
376 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
377
378 /*
379 * 4 possible field conversions are possible at the moment:
380 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB:
381 * two separate fields in the same input buffer are interlaced
382 * in the output buffer using weaving. Top field comes first.
383 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE:
384 * top field from the input buffer is copied to the output buffer
385 * using line doubling. Bottom field from the input buffer is discarded.
386 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT:
387 * two separate fields in the same input buffer are interlaced
388 * in the output buffer using weaving. Bottom field comes first.
389 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE:
390 * bottom field from the input buffer is copied to the output buffer
391 * using line doubling. Top field from the input buffer is discarded.
392 */
393 switch (dst_q_data->fmt->fourcc) {
394 case V4L2_PIX_FMT_YUV420:
395 switch (dst_q_data->field) {
396 case V4L2_FIELD_INTERLACED_TB:
397 case V4L2_FIELD_INTERLACED_BT:
398 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n",
399 __func__);
400 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
401 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0);
402 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
403 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0);
404 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
405 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1);
406 break;
407 case V4L2_FIELD_NONE:
408 default:
409 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n",
410 __func__);
411 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
412 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0);
413 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
414 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0);
415 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
416 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1);
417 break;
418 }
419 break;
420 case V4L2_PIX_FMT_YUYV:
421 default:
422 switch (dst_q_data->field) {
423 case V4L2_FIELD_INTERLACED_TB:
424 case V4L2_FIELD_INTERLACED_BT:
425 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n",
426 __func__);
427 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
428 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1);
429 break;
430 case V4L2_FIELD_NONE:
431 default:
432 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n",
433 __func__);
434 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
435 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1);
436 break;
437 }
438 break;
439 }
440
441 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__);
442}
443
444/*
445 * video ioctls
446 */
447static int vidioc_querycap(struct file *file, void *priv,
448 struct v4l2_capability *cap)
449{
450 strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
451 strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
452 strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card));
4703d356
SN		 453 /*
454 * This is only a mem-to-mem video device. The capture and output
455 * device capability flags are left only for backward compatibility
456 * and are scheduled for removal.
457 */
458 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
459 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
8f0755c0
JM		 460 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
461
462 return 0;
463}
464
465static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
466{
467 int i, num;
468 struct deinterlace_fmt *fmt;
469
470 num = 0;
471
472 for (i = 0; i < NUM_FORMATS; ++i) {
473 if (formats[i].types & type) {
474 /* index-th format of type type found ? */
475 if (num == f->index)
476 break;
477 /* Correct type but haven't reached our index yet,
478 * just increment per-type index */
479 ++num;
480 }
481 }
482
483 if (i < NUM_FORMATS) {
484 /* Format found */
485 fmt = &formats[i];
486 strlcpy(f->description, fmt->name, sizeof(f->description));
487 f->pixelformat = fmt->fourcc;
488 return 0;
489 }
490
491 /* Format not found */
492 return -EINVAL;
493}
494
495static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
496 struct v4l2_fmtdesc *f)
497{
498 return enum_fmt(f, MEM2MEM_CAPTURE);
499}
500
501static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
502 struct v4l2_fmtdesc *f)
503{
504 return enum_fmt(f, MEM2MEM_OUTPUT);
505}
506
507static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
508{
509 struct vb2_queue *vq;
510 struct deinterlace_q_data *q_data;
511
512 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
513 if (!vq)
514 return -EINVAL;
515
516 q_data = get_q_data(f->type);
517
518 f->fmt.pix.width = q_data->width;
519 f->fmt.pix.height = q_data->height;
520 f->fmt.pix.field = q_data->field;
521 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
522
523 switch (q_data->fmt->fourcc) {
524 case V4L2_PIX_FMT_YUV420:
525 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
526 break;
527 case V4L2_PIX_FMT_YUYV:
528 default:
529 f->fmt.pix.bytesperline = q_data->width * 2;
530 }
531
532 f->fmt.pix.sizeimage = q_data->sizeimage;
533 f->fmt.pix.colorspace = ctx->colorspace;
534
535 return 0;
536}
537
538static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
539 struct v4l2_format *f)
540{
541 return vidioc_g_fmt(priv, f);
542}
543
544static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
545 struct v4l2_format *f)
546{
547 return vidioc_g_fmt(priv, f);
548}
549
550static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)
551{
552 switch (f->fmt.pix.pixelformat) {
553 case V4L2_PIX_FMT_YUV420:
554 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
555 break;
556 case V4L2_PIX_FMT_YUYV:
557 default:
558 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
559 }
560 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
561
562 return 0;
563}
564
565static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
566 struct v4l2_format *f)
567{
568 struct deinterlace_fmt *fmt;
569 struct deinterlace_ctx *ctx = priv;
570
571 fmt = find_format(f);
572 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))
573 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
574
575 f->fmt.pix.colorspace = ctx->colorspace;
576
577 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&
578 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&
579 f->fmt.pix.field != V4L2_FIELD_NONE)
580 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
581
582 return vidioc_try_fmt(f, fmt);
583}
584
585static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
586 struct v4l2_format *f)
587{
588 struct deinterlace_fmt *fmt;
589
590 fmt = find_format(f);
591 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))
592 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
593
594 if (!f->fmt.pix.colorspace)
595 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
596
597 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&
598 f->fmt.pix.field != V4L2_FIELD_SEQ_BT)
599 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
600
601 return vidioc_try_fmt(f, fmt);
602}
603
604static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
605{
606 struct deinterlace_q_data *q_data;
607 struct vb2_queue *vq;
608
609 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
610 if (!vq)
611 return -EINVAL;
612
613 q_data = get_q_data(f->type);
614 if (!q_data)
615 return -EINVAL;
616
617 if (vb2_is_busy(vq)) {
618 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
619 return -EBUSY;
620 }
621
622 q_data->fmt = find_format(f);
623 if (!q_data->fmt) {
624 v4l2_err(&ctx->dev->v4l2_dev,
625 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",
626 f->type, f->fmt.pix.width, f->fmt.pix.height,
627 f->fmt.pix.pixelformat, f->fmt.pix.field);
628 return -EINVAL;
629 }
630
631 q_data->width = f->fmt.pix.width;
632 q_data->height = f->fmt.pix.height;
633 q_data->field = f->fmt.pix.field;
634
635 switch (f->fmt.pix.pixelformat) {
636 case V4L2_PIX_FMT_YUV420:
637 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
638 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;
639 break;
640 case V4L2_PIX_FMT_YUYV:
641 default:
642 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
643 q_data->sizeimage = q_data->width * q_data->height * 2;
644 }
645
646 dprintk(ctx->dev,
647 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
648 f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
649 q_data->field);
650
651 return 0;
652}
653
654static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
655 struct v4l2_format *f)
656{
657 int ret;
658
659 ret = vidioc_try_fmt_vid_cap(file, priv, f);
660 if (ret)
661 return ret;
662 return vidioc_s_fmt(priv, f);
663}
664
665static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
666 struct v4l2_format *f)
667{
668 struct deinterlace_ctx *ctx = priv;
669 int ret;
670
671 ret = vidioc_try_fmt_vid_out(file, priv, f);
672 if (ret)
673 return ret;
674
675 ret = vidioc_s_fmt(priv, f);
676 if (!ret)
677 ctx->colorspace = f->fmt.pix.colorspace;
678
679 return ret;
680}
681
682static int vidioc_reqbufs(struct file *file, void *priv,
683 struct v4l2_requestbuffers *reqbufs)
684{
685 struct deinterlace_ctx *ctx = priv;
686
687 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
688}
689
690static int vidioc_querybuf(struct file *file, void *priv,
691 struct v4l2_buffer *buf)
692{
693 struct deinterlace_ctx *ctx = priv;
694
695 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
696}
697
698static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
699{
700 struct deinterlace_ctx *ctx = priv;
701
702 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
703}
704
705static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
706{
707 struct deinterlace_ctx *ctx = priv;
708
709 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
710}
711
712static int vidioc_streamon(struct file *file, void *priv,
713 enum v4l2_buf_type type)
714{
715 struct deinterlace_q_data *s_q_data, *d_q_data;
716 struct deinterlace_ctx *ctx = priv;
717
718 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
719 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
720
721 /* Check that src and dst queues have the same pix format */
722 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {
723 v4l2_err(&ctx->dev->v4l2_dev,
724 "src and dst formats don't match.\n");
725 return -EINVAL;
726 }
727
728 /* Check that input and output deinterlacing types are compatible */
729 switch (s_q_data->field) {
730 case V4L2_FIELD_SEQ_BT:
731 if (d_q_data->field != V4L2_FIELD_NONE &&
732 d_q_data->field != V4L2_FIELD_INTERLACED_BT) {
733 v4l2_err(&ctx->dev->v4l2_dev,
734 "src and dst field conversion [(%d)->(%d)] not supported.\n",
735 s_q_data->field, d_q_data->field);
736 return -EINVAL;
737 }
738 break;
739 case V4L2_FIELD_SEQ_TB:
740 if (d_q_data->field != V4L2_FIELD_NONE &&
741 d_q_data->field != V4L2_FIELD_INTERLACED_TB) {
742 v4l2_err(&ctx->dev->v4l2_dev,
743 "src and dst field conversion [(%d)->(%d)] not supported.\n",
744 s_q_data->field, d_q_data->field);
745 return -EINVAL;
746 }
747 break;
748 default:
749 return -EINVAL;
750 }
751
752 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
753}
754
755static int vidioc_streamoff(struct file *file, void *priv,
756 enum v4l2_buf_type type)
757{
758 struct deinterlace_ctx *ctx = priv;
759
760 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
761}
762
763static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
764 .vidioc_querycap = vidioc_querycap,
765
766 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
767 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
768 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
769 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
770
771 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
772 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
773 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
774 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
775
776 .vidioc_reqbufs = vidioc_reqbufs,
777 .vidioc_querybuf = vidioc_querybuf,
778
779 .vidioc_qbuf = vidioc_qbuf,
780 .vidioc_dqbuf = vidioc_dqbuf,
781
782 .vidioc_streamon = vidioc_streamon,
783 .vidioc_streamoff = vidioc_streamoff,
784};
785
786
787/*
788 * Queue operations
789 */
790struct vb2_dc_conf {
791 struct device *dev;
792};
793
794static int deinterlace_queue_setup(struct vb2_queue *vq,
795 const struct v4l2_format *fmt,
796 unsigned int *nbuffers, unsigned int *nplanes,
797 unsigned int sizes[], void *alloc_ctxs[])
798{
799 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
800 struct deinterlace_q_data *q_data;
801 unsigned int size, count = *nbuffers;
802
803 q_data = get_q_data(vq->type);
804
805 switch (q_data->fmt->fourcc) {
806 case V4L2_PIX_FMT_YUV420:
807 size = q_data->width * q_data->height * 3 / 2;
808 break;
809 case V4L2_PIX_FMT_YUYV:
810 default:
811 size = q_data->width * q_data->height * 2;
812 }
813
814 *nplanes = 1;
815 *nbuffers = count;
816 sizes[0] = size;
817
818 alloc_ctxs[0] = ctx->dev->alloc_ctx;
819
820 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
821
822 return 0;
823}
824
825static int deinterlace_buf_prepare(struct vb2_buffer *vb)
826{
827 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
828 struct deinterlace_q_data *q_data;
829
830 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
831
832 q_data = get_q_data(vb->vb2_queue->type);
833
834 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
835 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
836 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
837 return -EINVAL;
838 }
839
840 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
841
842 return 0;
843}
844
845static void deinterlace_buf_queue(struct vb2_buffer *vb)
846{
847 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
848 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
849}
850
851static struct vb2_ops deinterlace_qops = {
852 .queue_setup = deinterlace_queue_setup,
853 .buf_prepare = deinterlace_buf_prepare,
854 .buf_queue = deinterlace_buf_queue,
855};
856
857static int queue_init(void *priv, struct vb2_queue *src_vq,
858 struct vb2_queue *dst_vq)
859{
860 struct deinterlace_ctx *ctx = priv;
861 int ret;
862
8f0755c0
JM		 863 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
864 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
865 src_vq->drv_priv = ctx;
866 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
867 src_vq->ops = &deinterlace_qops;
868 src_vq->mem_ops = &vb2_dma_contig_memops;
869 q_data[V4L2_M2M_SRC].fmt = &formats[0];
870 q_data[V4L2_M2M_SRC].width = 640;
871 q_data[V4L2_M2M_SRC].height = 480;
872 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;
873 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;
874
875 ret = vb2_queue_init(src_vq);
876 if (ret)
877 return ret;
878
8f0755c0
JM		 879 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
880 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
881 dst_vq->drv_priv = ctx;
882 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
883 dst_vq->ops = &deinterlace_qops;
884 dst_vq->mem_ops = &vb2_dma_contig_memops;
885 q_data[V4L2_M2M_DST].fmt = &formats[0];
886 q_data[V4L2_M2M_DST].width = 640;
887 q_data[V4L2_M2M_DST].height = 480;
888 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
889 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
890
891 return vb2_queue_init(dst_vq);
892}
893
894/*
895 * File operations
896 */
897static int deinterlace_open(struct file *file)
898{
899 struct deinterlace_dev *pcdev = video_drvdata(file);
900 struct deinterlace_ctx *ctx = NULL;
901
902 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
903 if (!ctx)
904 return -ENOMEM;
905
906 file->private_data = ctx;
907 ctx->dev = pcdev;
908
909 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
910 if (IS_ERR(ctx->m2m_ctx)) {
911 int ret = PTR_ERR(ctx->m2m_ctx);
912
913 kfree(ctx);
914 return ret;
915 }
916
917 ctx->xt = kzalloc(sizeof(struct dma_async_tx_descriptor) +
918 sizeof(struct data_chunk), GFP_KERNEL);
919 if (!ctx->xt) {
920 int ret = PTR_ERR(ctx->xt);
921
922 kfree(ctx);
923 return ret;
924 }
925
926 ctx->colorspace = V4L2_COLORSPACE_REC709;
927
928 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
929
930 return 0;
931}
932
933static int deinterlace_release(struct file *file)
934{
935 struct deinterlace_dev *pcdev = video_drvdata(file);
936 struct deinterlace_ctx *ctx = file->private_data;
937
938 dprintk(pcdev, "Releasing instance %p\n", ctx);
939
940 v4l2_m2m_ctx_release(ctx->m2m_ctx);
941 kfree(ctx->xt);
942 kfree(ctx);
943
944 return 0;
945}
946
947static unsigned int deinterlace_poll(struct file *file,
948 struct poll_table_struct *wait)
949{
950 struct deinterlace_ctx *ctx = file->private_data;
951 int ret;
952
953 deinterlace_lock(ctx);
954 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
955 deinterlace_unlock(ctx);
956
957 return ret;
958}
959
960static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
961{
962 struct deinterlace_ctx *ctx = file->private_data;
963
964 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
965}
966
967static const struct v4l2_file_operations deinterlace_fops = {
968 .owner = THIS_MODULE,
969 .open = deinterlace_open,
970 .release = deinterlace_release,
971 .poll = deinterlace_poll,
972 .unlocked_ioctl = video_ioctl2,
973 .mmap = deinterlace_mmap,
974};
975
976static struct video_device deinterlace_videodev = {
977 .name = MEM2MEM_NAME,
978 .fops = &deinterlace_fops,
979 .ioctl_ops = &deinterlace_ioctl_ops,
980 .minor = -1,
981 .release = video_device_release,
954f340f 982 .vfl_dir = VFL_DIR_M2M,
8f0755c0
JM		 983};
984
985static struct v4l2_m2m_ops m2m_ops = {
986 .device_run = deinterlace_device_run,
987 .job_ready = deinterlace_job_ready,
988 .job_abort = deinterlace_job_abort,
989 .lock = deinterlace_lock,
990 .unlock = deinterlace_unlock,
991};
992
993static int deinterlace_probe(struct platform_device *pdev)
994{
995 struct deinterlace_dev *pcdev;
996 struct video_device *vfd;
997 dma_cap_mask_t mask;
998 int ret = 0;
999
1000 pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
1001 if (!pcdev)
1002 return -ENOMEM;
1003
1004 spin_lock_init(&pcdev->irqlock);
1005
1006 dma_cap_zero(mask);
1007 dma_cap_set(DMA_INTERLEAVE, mask);
1008 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
1009 if (!pcdev->dma_chan)
1010 goto free_dev;
1011
1012 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
1013 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n");
1014 goto rel_dma;
1015 }
1016
1017 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
1018 if (ret)
1019 goto rel_dma;
1020
1021 atomic_set(&pcdev->busy, 0);
1022 mutex_init(&pcdev->dev_mutex);
1023
1024 vfd = video_device_alloc();
1025 if (!vfd) {
1026 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
1027 ret = -ENOMEM;
1028 goto unreg_dev;
1029 }
1030
1031 *vfd = deinterlace_videodev;
1032 vfd->lock = &pcdev->dev_mutex;
1033
1034 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1035 if (ret) {
1036 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
1037 goto rel_vdev;
1038 }
1039
1040 video_set_drvdata(vfd, pcdev);
1041 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
1042 pcdev->vfd = vfd;
1043 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
1044 " Device registered as /dev/video%d\n", vfd->num);
1045
1046 platform_set_drvdata(pdev, pcdev);
1047
1048 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1049 if (IS_ERR(pcdev->alloc_ctx)) {
1050 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
1051 ret = PTR_ERR(pcdev->alloc_ctx);
1052 goto err_ctx;
1053 }
1054
1055 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1056 if (IS_ERR(pcdev->m2m_dev)) {
1057 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
1058 ret = PTR_ERR(pcdev->m2m_dev);
1059 goto err_m2m;
1060 }
1061
1062 return 0;
1063
1064 v4l2_m2m_release(pcdev->m2m_dev);
1065err_m2m:
1066 video_unregister_device(pcdev->vfd);
1067err_ctx:
1068 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1069rel_vdev:
1070 video_device_release(vfd);
1071unreg_dev:
1072 v4l2_device_unregister(&pcdev->v4l2_dev);
1073rel_dma:
1074 dma_release_channel(pcdev->dma_chan);
1075free_dev:
1076 kfree(pcdev);
1077
1078 return ret;
1079}
1080
1081static int deinterlace_remove(struct platform_device *pdev)
1082{
1083 struct deinterlace_dev *pcdev =
1084 (struct deinterlace_dev *)platform_get_drvdata(pdev);
1085
1086 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
1087 v4l2_m2m_release(pcdev->m2m_dev);
1088 video_unregister_device(pcdev->vfd);
1089 v4l2_device_unregister(&pcdev->v4l2_dev);
1090 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1091 dma_release_channel(pcdev->dma_chan);
1092 kfree(pcdev);
1093
1094 return 0;
1095}
1096
1097static struct platform_driver deinterlace_pdrv = {
1098 .probe = deinterlace_probe,
1099 .remove = deinterlace_remove,
1100 .driver = {
1101 .name = MEM2MEM_NAME,
1102 .owner = THIS_MODULE,
1103 },
1104};
50509e5c 1105module_platform_driver(deinterlace_pdrv);
8f0755c0 1106
Linux 6.x block layer and io_uring tree(s)