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Merge remote-tracking branch 'selinux/next'
[deliverable/linux.git] / drivers / media / platform / sti / hva / hva-v4l2.c
1 /*
2 * Copyright (C) STMicroelectronics SA 2015
3 * Authors: Yannick Fertre <yannick.fertre@st.com>
4 * Hugues Fruchet <hugues.fruchet@st.com>
5 * License terms: GNU General Public License (GPL), version 2
6 */
7
8 #include <linux/module.h>
9 #include <linux/platform_device.h>
10 #include <linux/slab.h>
11 #include <media/v4l2-event.h>
12 #include <media/v4l2-ioctl.h>
13 #include <media/videobuf2-dma-contig.h>
14
15 #include "hva.h"
16 #include "hva-hw.h"
17
18 #define HVA_NAME "st-hva"
19
20 #define MIN_FRAMES 1
21 #define MIN_STREAMS 1
22
23 #define HVA_MIN_WIDTH 32
24 #define HVA_MAX_WIDTH 1920
25 #define HVA_MIN_HEIGHT 32
26 #define HVA_MAX_HEIGHT 1920
27
28 /* HVA requires a 16x16 pixels alignment for frames */
29 #define HVA_WIDTH_ALIGNMENT 16
30 #define HVA_HEIGHT_ALIGNMENT 16
31
32 #define HVA_DEFAULT_WIDTH HVA_MIN_WIDTH
33 #define HVA_DEFAULT_HEIGHT HVA_MIN_HEIGHT
34 #define HVA_DEFAULT_FRAME_NUM 1
35 #define HVA_DEFAULT_FRAME_DEN 30
36
37 #define to_type_str(type) (type == V4L2_BUF_TYPE_VIDEO_OUTPUT ? \
38 "frame" : "stream")
39
40 #define fh_to_ctx(f) (container_of(f, struct hva_ctx, fh))
41
42 /* registry of available encoders */
43 const struct hva_enc *hva_encoders[] = {
44 &nv12h264enc,
45 &nv21h264enc,
46 };
47
48 static inline int frame_size(u32 w, u32 h, u32 fmt)
49 {
50 switch (fmt) {
51 case V4L2_PIX_FMT_NV12:
52 case V4L2_PIX_FMT_NV21:
53 return (w * h * 3) / 2;
54 default:
55 return 0;
56 }
57 }
58
59 static inline int frame_stride(u32 w, u32 fmt)
60 {
61 switch (fmt) {
62 case V4L2_PIX_FMT_NV12:
63 case V4L2_PIX_FMT_NV21:
64 return w;
65 default:
66 return 0;
67 }
68 }
69
70 static inline int frame_alignment(u32 fmt)
71 {
72 switch (fmt) {
73 case V4L2_PIX_FMT_NV12:
74 case V4L2_PIX_FMT_NV21:
75 /* multiple of 2 */
76 return 2;
77 default:
78 return 1;
79 }
80 }
81
82 static inline int estimated_stream_size(u32 w, u32 h)
83 {
84 /*
85 * HVA only encodes in YUV420 format, whatever the frame format.
86 * A compression ratio of 2 is assumed: thus, the maximum size
87 * of a stream is estimated to ((width x height x 3 / 2) / 2)
88 */
89 return (w * h * 3) / 4;
90 }
91
92 static void set_default_params(struct hva_ctx *ctx)
93 {
94 struct hva_frameinfo *frameinfo = &ctx->frameinfo;
95 struct hva_streaminfo *streaminfo = &ctx->streaminfo;
96
97 frameinfo->pixelformat = V4L2_PIX_FMT_NV12;
98 frameinfo->width = HVA_DEFAULT_WIDTH;
99 frameinfo->height = HVA_DEFAULT_HEIGHT;
100 frameinfo->aligned_width = ALIGN(frameinfo->width,
101 HVA_WIDTH_ALIGNMENT);
102 frameinfo->aligned_height = ALIGN(frameinfo->height,
103 HVA_HEIGHT_ALIGNMENT);
104 frameinfo->size = frame_size(frameinfo->aligned_width,
105 frameinfo->aligned_height,
106 frameinfo->pixelformat);
107
108 streaminfo->streamformat = V4L2_PIX_FMT_H264;
109 streaminfo->width = HVA_DEFAULT_WIDTH;
110 streaminfo->height = HVA_DEFAULT_HEIGHT;
111
112 ctx->colorspace = V4L2_COLORSPACE_REC709;
113 ctx->xfer_func = V4L2_XFER_FUNC_DEFAULT;
114 ctx->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
115 ctx->quantization = V4L2_QUANTIZATION_DEFAULT;
116
117 ctx->max_stream_size = estimated_stream_size(streaminfo->width,
118 streaminfo->height);
119 }
120
121 static const struct hva_enc *hva_find_encoder(struct hva_ctx *ctx,
122 u32 pixelformat,
123 u32 streamformat)
124 {
125 struct hva_dev *hva = ctx_to_hdev(ctx);
126 const struct hva_enc *enc;
127 unsigned int i;
128
129 for (i = 0; i < hva->nb_of_encoders; i++) {
130 enc = hva->encoders[i];
131 if ((enc->pixelformat == pixelformat) &&
132 (enc->streamformat == streamformat))
133 return enc;
134 }
135
136 return NULL;
137 }
138
139 static void register_format(u32 format, u32 formats[], u32 *nb_of_formats)
140 {
141 u32 i;
142 bool found = false;
143
144 for (i = 0; i < *nb_of_formats; i++) {
145 if (format == formats[i]) {
146 found = true;
147 break;
148 }
149 }
150
151 if (!found)
152 formats[(*nb_of_formats)++] = format;
153 }
154
155 static void register_formats(struct hva_dev *hva)
156 {
157 unsigned int i;
158
159 for (i = 0; i < hva->nb_of_encoders; i++) {
160 register_format(hva->encoders[i]->pixelformat,
161 hva->pixelformats,
162 &hva->nb_of_pixelformats);
163
164 register_format(hva->encoders[i]->streamformat,
165 hva->streamformats,
166 &hva->nb_of_streamformats);
167 }
168 }
169
170 static void register_encoders(struct hva_dev *hva)
171 {
172 struct device *dev = hva_to_dev(hva);
173 unsigned int i;
174
175 for (i = 0; i < ARRAY_SIZE(hva_encoders); i++) {
176 if (hva->nb_of_encoders >= HVA_MAX_ENCODERS) {
177 dev_dbg(dev,
178 "%s failed to register %s encoder (%d maximum reached)\n",
179 HVA_PREFIX, hva_encoders[i]->name,
180 HVA_MAX_ENCODERS);
181 return;
182 }
183
184 hva->encoders[hva->nb_of_encoders++] = hva_encoders[i];
185 dev_info(dev, "%s %s encoder registered\n", HVA_PREFIX,
186 hva_encoders[i]->name);
187 }
188 }
189
190 static int hva_open_encoder(struct hva_ctx *ctx, u32 streamformat,
191 u32 pixelformat, struct hva_enc **penc)
192 {
193 struct hva_dev *hva = ctx_to_hdev(ctx);
194 struct device *dev = ctx_to_dev(ctx);
195 struct hva_enc *enc;
196 int ret;
197
198 /* find an encoder which can deal with these formats */
199 enc = (struct hva_enc *)hva_find_encoder(ctx, pixelformat,
200 streamformat);
201 if (!enc) {
202 dev_err(dev, "%s no encoder found matching %4.4s => %4.4s\n",
203 ctx->name, (char *)&pixelformat, (char *)&streamformat);
204 return -EINVAL;
205 }
206
207 dev_dbg(dev, "%s one encoder matching %4.4s => %4.4s\n",
208 ctx->name, (char *)&pixelformat, (char *)&streamformat);
209
210 /* update instance name */
211 snprintf(ctx->name, sizeof(ctx->name), "[%3d:%4.4s]",
212 hva->instance_id, (char *)&streamformat);
213
214 /* open encoder instance */
215 ret = enc->open(ctx);
216 if (ret) {
217 dev_err(dev, "%s failed to open encoder instance (%d)\n",
218 ctx->name, ret);
219 return ret;
220 }
221
222 dev_dbg(dev, "%s %s encoder opened\n", ctx->name, enc->name);
223
224 *penc = enc;
225
226 return ret;
227 }
228
229 /*
230 * V4L2 ioctl operations
231 */
232
233 static int hva_querycap(struct file *file, void *priv,
234 struct v4l2_capability *cap)
235 {
236 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
237 struct hva_dev *hva = ctx_to_hdev(ctx);
238
239 strlcpy(cap->driver, HVA_NAME, sizeof(cap->driver));
240 strlcpy(cap->card, hva->vdev->name, sizeof(cap->card));
241 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
242 hva->pdev->name);
243
244 return 0;
245 }
246
247 static int hva_enum_fmt_stream(struct file *file, void *priv,
248 struct v4l2_fmtdesc *f)
249 {
250 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
251 struct hva_dev *hva = ctx_to_hdev(ctx);
252
253 if (unlikely(f->index >= hva->nb_of_streamformats))
254 return -EINVAL;
255
256 f->pixelformat = hva->streamformats[f->index];
257
258 return 0;
259 }
260
261 static int hva_enum_fmt_frame(struct file *file, void *priv,
262 struct v4l2_fmtdesc *f)
263 {
264 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
265 struct hva_dev *hva = ctx_to_hdev(ctx);
266
267 if (unlikely(f->index >= hva->nb_of_pixelformats))
268 return -EINVAL;
269
270 f->pixelformat = hva->pixelformats[f->index];
271
272 return 0;
273 }
274
275 static int hva_g_fmt_stream(struct file *file, void *fh, struct v4l2_format *f)
276 {
277 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
278 struct hva_streaminfo *streaminfo = &ctx->streaminfo;
279
280 f->fmt.pix.width = streaminfo->width;
281 f->fmt.pix.height = streaminfo->height;
282 f->fmt.pix.field = V4L2_FIELD_NONE;
283 f->fmt.pix.colorspace = ctx->colorspace;
284 f->fmt.pix.xfer_func = ctx->xfer_func;
285 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
286 f->fmt.pix.quantization = ctx->quantization;
287 f->fmt.pix.pixelformat = streaminfo->streamformat;
288 f->fmt.pix.bytesperline = 0;
289 f->fmt.pix.sizeimage = ctx->max_stream_size;
290
291 return 0;
292 }
293
294 static int hva_g_fmt_frame(struct file *file, void *fh, struct v4l2_format *f)
295 {
296 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
297 struct hva_frameinfo *frameinfo = &ctx->frameinfo;
298
299 f->fmt.pix.width = frameinfo->width;
300 f->fmt.pix.height = frameinfo->height;
301 f->fmt.pix.field = V4L2_FIELD_NONE;
302 f->fmt.pix.colorspace = ctx->colorspace;
303 f->fmt.pix.xfer_func = ctx->xfer_func;
304 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
305 f->fmt.pix.quantization = ctx->quantization;
306 f->fmt.pix.pixelformat = frameinfo->pixelformat;
307 f->fmt.pix.bytesperline = frame_stride(frameinfo->aligned_width,
308 frameinfo->pixelformat);
309 f->fmt.pix.sizeimage = frameinfo->size;
310
311 return 0;
312 }
313
314 static int hva_try_fmt_stream(struct file *file, void *priv,
315 struct v4l2_format *f)
316 {
317 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
318 struct device *dev = ctx_to_dev(ctx);
319 struct v4l2_pix_format *pix = &f->fmt.pix;
320 u32 streamformat = pix->pixelformat;
321 const struct hva_enc *enc;
322 u32 width, height;
323 u32 stream_size;
324
325 enc = hva_find_encoder(ctx, ctx->frameinfo.pixelformat, streamformat);
326 if (!enc) {
327 dev_dbg(dev,
328 "%s V4L2 TRY_FMT (CAPTURE): unsupported format %.4s\n",
329 ctx->name, (char *)&pix->pixelformat);
330 return -EINVAL;
331 }
332
333 width = pix->width;
334 height = pix->height;
335 if (ctx->flags & HVA_FLAG_FRAMEINFO) {
336 /*
337 * if the frame resolution is already fixed, only allow the
338 * same stream resolution
339 */
340 pix->width = ctx->frameinfo.width;
341 pix->height = ctx->frameinfo.height;
342 if ((pix->width != width) || (pix->height != height))
343 dev_dbg(dev,
344 "%s V4L2 TRY_FMT (CAPTURE): resolution updated %dx%d -> %dx%d to fit frame resolution\n",
345 ctx->name, width, height,
346 pix->width, pix->height);
347 } else {
348 /* adjust width & height */
349 v4l_bound_align_image(&pix->width,
350 HVA_MIN_WIDTH, enc->max_width,
351 0,
352 &pix->height,
353 HVA_MIN_HEIGHT, enc->max_height,
354 0,
355 0);
356
357 if ((pix->width != width) || (pix->height != height))
358 dev_dbg(dev,
359 "%s V4L2 TRY_FMT (CAPTURE): resolution updated %dx%d -> %dx%d to fit min/max/alignment\n",
360 ctx->name, width, height,
361 pix->width, pix->height);
362 }
363
364 stream_size = estimated_stream_size(pix->width, pix->height);
365 if (pix->sizeimage < stream_size)
366 pix->sizeimage = stream_size;
367
368 pix->bytesperline = 0;
369 pix->colorspace = ctx->colorspace;
370 pix->xfer_func = ctx->xfer_func;
371 pix->ycbcr_enc = ctx->ycbcr_enc;
372 pix->quantization = ctx->quantization;
373 pix->field = V4L2_FIELD_NONE;
374
375 return 0;
376 }
377
378 static int hva_try_fmt_frame(struct file *file, void *priv,
379 struct v4l2_format *f)
380 {
381 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
382 struct device *dev = ctx_to_dev(ctx);
383 struct v4l2_pix_format *pix = &f->fmt.pix;
384 u32 pixelformat = pix->pixelformat;
385 const struct hva_enc *enc;
386 u32 width, height;
387
388 enc = hva_find_encoder(ctx, pixelformat, ctx->streaminfo.streamformat);
389 if (!enc) {
390 dev_dbg(dev,
391 "%s V4L2 TRY_FMT (OUTPUT): unsupported format %.4s\n",
392 ctx->name, (char *)&pixelformat);
393 return -EINVAL;
394 }
395
396 /* adjust width & height */
397 width = pix->width;
398 height = pix->height;
399 v4l_bound_align_image(&pix->width,
400 HVA_MIN_WIDTH, HVA_MAX_WIDTH,
401 frame_alignment(pixelformat) - 1,
402 &pix->height,
403 HVA_MIN_HEIGHT, HVA_MAX_HEIGHT,
404 frame_alignment(pixelformat) - 1,
405 0);
406
407 if ((pix->width != width) || (pix->height != height))
408 dev_dbg(dev,
409 "%s V4L2 TRY_FMT (OUTPUT): resolution updated %dx%d -> %dx%d to fit min/max/alignment\n",
410 ctx->name, width, height, pix->width, pix->height);
411
412 width = ALIGN(pix->width, HVA_WIDTH_ALIGNMENT);
413 height = ALIGN(pix->height, HVA_HEIGHT_ALIGNMENT);
414
415 if (!pix->colorspace) {
416 pix->colorspace = V4L2_COLORSPACE_REC709;
417 pix->xfer_func = V4L2_XFER_FUNC_DEFAULT;
418 pix->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
419 pix->quantization = V4L2_QUANTIZATION_DEFAULT;
420 }
421
422 pix->bytesperline = frame_stride(width, pixelformat);
423 pix->sizeimage = frame_size(width, height, pixelformat);
424 pix->field = V4L2_FIELD_NONE;
425
426 return 0;
427 }
428
429 static int hva_s_fmt_stream(struct file *file, void *fh, struct v4l2_format *f)
430 {
431 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
432 struct device *dev = ctx_to_dev(ctx);
433 struct vb2_queue *vq;
434 int ret;
435
436 ret = hva_try_fmt_stream(file, fh, f);
437 if (ret) {
438 dev_dbg(dev, "%s V4L2 S_FMT (CAPTURE): unsupported format %.4s\n",
439 ctx->name, (char *)&f->fmt.pix.pixelformat);
440 return ret;
441 }
442
443 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
444 if (vb2_is_streaming(vq)) {
445 dev_dbg(dev, "%s V4L2 S_FMT (CAPTURE): queue busy\n",
446 ctx->name);
447 return -EBUSY;
448 }
449
450 ctx->max_stream_size = f->fmt.pix.sizeimage;
451 ctx->streaminfo.width = f->fmt.pix.width;
452 ctx->streaminfo.height = f->fmt.pix.height;
453 ctx->streaminfo.streamformat = f->fmt.pix.pixelformat;
454 ctx->flags |= HVA_FLAG_STREAMINFO;
455
456 return 0;
457 }
458
459 static int hva_s_fmt_frame(struct file *file, void *fh, struct v4l2_format *f)
460 {
461 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
462 struct device *dev = ctx_to_dev(ctx);
463 struct v4l2_pix_format *pix = &f->fmt.pix;
464 struct vb2_queue *vq;
465 int ret;
466
467 ret = hva_try_fmt_frame(file, fh, f);
468 if (ret) {
469 dev_dbg(dev, "%s V4L2 S_FMT (OUTPUT): unsupported format %.4s\n",
470 ctx->name, (char *)&pix->pixelformat);
471 return ret;
472 }
473
474 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
475 if (vb2_is_streaming(vq)) {
476 dev_dbg(dev, "%s V4L2 S_FMT (OUTPUT): queue busy\n", ctx->name);
477 return -EBUSY;
478 }
479
480 ctx->colorspace = pix->colorspace;
481 ctx->xfer_func = pix->xfer_func;
482 ctx->ycbcr_enc = pix->ycbcr_enc;
483 ctx->quantization = pix->quantization;
484
485 ctx->frameinfo.aligned_width = ALIGN(pix->width, HVA_WIDTH_ALIGNMENT);
486 ctx->frameinfo.aligned_height = ALIGN(pix->height,
487 HVA_HEIGHT_ALIGNMENT);
488 ctx->frameinfo.size = pix->sizeimage;
489 ctx->frameinfo.pixelformat = pix->pixelformat;
490 ctx->frameinfo.width = pix->width;
491 ctx->frameinfo.height = pix->height;
492 ctx->flags |= HVA_FLAG_FRAMEINFO;
493
494 return 0;
495 }
496
497 static int hva_g_parm(struct file *file, void *fh, struct v4l2_streamparm *sp)
498 {
499 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
500 struct v4l2_fract *time_per_frame = &ctx->ctrls.time_per_frame;
501
502 if (sp->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
503 return -EINVAL;
504
505 sp->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
506 sp->parm.output.timeperframe.numerator = time_per_frame->numerator;
507 sp->parm.output.timeperframe.denominator =
508 time_per_frame->denominator;
509
510 return 0;
511 }
512
513 static int hva_s_parm(struct file *file, void *fh, struct v4l2_streamparm *sp)
514 {
515 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
516 struct v4l2_fract *time_per_frame = &ctx->ctrls.time_per_frame;
517
518 if (sp->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
519 return -EINVAL;
520
521 if (!sp->parm.output.timeperframe.numerator ||
522 !sp->parm.output.timeperframe.denominator)
523 return hva_g_parm(file, fh, sp);
524
525 sp->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
526 time_per_frame->numerator = sp->parm.output.timeperframe.numerator;
527 time_per_frame->denominator =
528 sp->parm.output.timeperframe.denominator;
529
530 return 0;
531 }
532
533 static int hva_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
534 {
535 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
536 struct device *dev = ctx_to_dev(ctx);
537
538 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
539 /*
540 * depending on the targeted compressed video format, the
541 * capture buffer might contain headers (e.g. H.264 SPS/PPS)
542 * filled in by the driver client; the size of these data is
543 * copied from the bytesused field of the V4L2 buffer in the
544 * payload field of the hva stream buffer
545 */
546 struct vb2_queue *vq;
547 struct hva_stream *stream;
548
549 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, buf->type);
550
551 if (buf->index >= vq->num_buffers) {
552 dev_dbg(dev, "%s buffer index %d out of range (%d)\n",
553 ctx->name, buf->index, vq->num_buffers);
554 return -EINVAL;
555 }
556
557 stream = (struct hva_stream *)vq->bufs[buf->index];
558 stream->bytesused = buf->bytesused;
559 }
560
561 return v4l2_m2m_qbuf(file, ctx->fh.m2m_ctx, buf);
562 }
563
564 /* V4L2 ioctl ops */
565 static const struct v4l2_ioctl_ops hva_ioctl_ops = {
566 .vidioc_querycap = hva_querycap,
567 .vidioc_enum_fmt_vid_cap = hva_enum_fmt_stream,
568 .vidioc_enum_fmt_vid_out = hva_enum_fmt_frame,
569 .vidioc_g_fmt_vid_cap = hva_g_fmt_stream,
570 .vidioc_g_fmt_vid_out = hva_g_fmt_frame,
571 .vidioc_try_fmt_vid_cap = hva_try_fmt_stream,
572 .vidioc_try_fmt_vid_out = hva_try_fmt_frame,
573 .vidioc_s_fmt_vid_cap = hva_s_fmt_stream,
574 .vidioc_s_fmt_vid_out = hva_s_fmt_frame,
575 .vidioc_g_parm = hva_g_parm,
576 .vidioc_s_parm = hva_s_parm,
577 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
578 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
579 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
580 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
581 .vidioc_qbuf = hva_qbuf,
582 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
583 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
584 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
585 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
586 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
587 };
588
589 /*
590 * V4L2 control operations
591 */
592
593 static int hva_s_ctrl(struct v4l2_ctrl *ctrl)
594 {
595 struct hva_ctx *ctx = container_of(ctrl->handler, struct hva_ctx,
596 ctrl_handler);
597 struct device *dev = ctx_to_dev(ctx);
598
599 dev_dbg(dev, "%s S_CTRL: id = %d, val = %d\n", ctx->name,
600 ctrl->id, ctrl->val);
601
602 switch (ctrl->id) {
603 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
604 ctx->ctrls.bitrate_mode = ctrl->val;
605 break;
606 case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
607 ctx->ctrls.gop_size = ctrl->val;
608 break;
609 case V4L2_CID_MPEG_VIDEO_BITRATE:
610 ctx->ctrls.bitrate = ctrl->val;
611 break;
612 case V4L2_CID_MPEG_VIDEO_ASPECT:
613 ctx->ctrls.aspect = ctrl->val;
614 break;
615 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
616 ctx->ctrls.profile = ctrl->val;
617 if (ctx->flags & HVA_FLAG_STREAMINFO)
618 snprintf(ctx->streaminfo.profile,
619 sizeof(ctx->streaminfo.profile),
620 "%s profile",
621 v4l2_ctrl_get_menu(ctrl->id)[ctrl->val]);
622 break;
623 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
624 ctx->ctrls.level = ctrl->val;
625 if (ctx->flags & HVA_FLAG_STREAMINFO)
626 snprintf(ctx->streaminfo.level,
627 sizeof(ctx->streaminfo.level),
628 "level %s",
629 v4l2_ctrl_get_menu(ctrl->id)[ctrl->val]);
630 break;
631 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
632 ctx->ctrls.entropy_mode = ctrl->val;
633 break;
634 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE:
635 ctx->ctrls.cpb_size = ctrl->val;
636 break;
637 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
638 ctx->ctrls.dct8x8 = ctrl->val;
639 break;
640 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP:
641 ctx->ctrls.qpmin = ctrl->val;
642 break;
643 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP:
644 ctx->ctrls.qpmax = ctrl->val;
645 break;
646 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
647 ctx->ctrls.vui_sar = ctrl->val;
648 break;
649 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
650 ctx->ctrls.vui_sar_idc = ctrl->val;
651 break;
652 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING:
653 ctx->ctrls.sei_fp = ctrl->val;
654 break;
655 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
656 ctx->ctrls.sei_fp_type = ctrl->val;
657 break;
658 default:
659 dev_dbg(dev, "%s S_CTRL: invalid control (id = %d)\n",
660 ctx->name, ctrl->id);
661 return -EINVAL;
662 }
663
664 return 0;
665 }
666
667 /* V4L2 control ops */
668 static const struct v4l2_ctrl_ops hva_ctrl_ops = {
669 .s_ctrl = hva_s_ctrl,
670 };
671
672 static int hva_ctrls_setup(struct hva_ctx *ctx)
673 {
674 struct device *dev = ctx_to_dev(ctx);
675 u64 mask;
676 enum v4l2_mpeg_video_h264_sei_fp_arrangement_type sei_fp_type =
677 V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TOP_BOTTOM;
678
679 v4l2_ctrl_handler_init(&ctx->ctrl_handler, 15);
680
681 v4l2_ctrl_new_std_menu(&ctx->ctrl_handler, &hva_ctrl_ops,
682 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
683 V4L2_MPEG_VIDEO_BITRATE_MODE_CBR,
684 0,
685 V4L2_MPEG_VIDEO_BITRATE_MODE_CBR);
686
687 v4l2_ctrl_new_std(&ctx->ctrl_handler, &hva_ctrl_ops,
688 V4L2_CID_MPEG_VIDEO_GOP_SIZE,
689 1, 60, 1, 16);
690
691 v4l2_ctrl_new_std(&ctx->ctrl_handler, &hva_ctrl_ops,
692 V4L2_CID_MPEG_VIDEO_BITRATE,
693 1000, 60000000, 1000, 20000000);
694
695 mask = ~(1 << V4L2_MPEG_VIDEO_ASPECT_1x1);
696 v4l2_ctrl_new_std_menu(&ctx->ctrl_handler, &hva_ctrl_ops,
697 V4L2_CID_MPEG_VIDEO_ASPECT,
698 V4L2_MPEG_VIDEO_ASPECT_1x1,
699 mask,
700 V4L2_MPEG_VIDEO_ASPECT_1x1);
701
702 mask = ~((1 << V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE) |
703 (1 << V4L2_MPEG_VIDEO_H264_PROFILE_MAIN) |
704 (1 << V4L2_MPEG_VIDEO_H264_PROFILE_HIGH) |
705 (1 << V4L2_MPEG_VIDEO_H264_PROFILE_STEREO_HIGH));
706 v4l2_ctrl_new_std_menu(&ctx->ctrl_handler, &hva_ctrl_ops,
707 V4L2_CID_MPEG_VIDEO_H264_PROFILE,
708 V4L2_MPEG_VIDEO_H264_PROFILE_STEREO_HIGH,
709 mask,
710 V4L2_MPEG_VIDEO_H264_PROFILE_HIGH);
711
712 v4l2_ctrl_new_std_menu(&ctx->ctrl_handler, &hva_ctrl_ops,
713 V4L2_CID_MPEG_VIDEO_H264_LEVEL,
714 V4L2_MPEG_VIDEO_H264_LEVEL_4_2,
715 0,
716 V4L2_MPEG_VIDEO_H264_LEVEL_4_0);
717
718 v4l2_ctrl_new_std_menu(&ctx->ctrl_handler, &hva_ctrl_ops,
719 V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE,
720 V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CABAC,
721 0,
722 V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CAVLC);
723
724 v4l2_ctrl_new_std(&ctx->ctrl_handler, &hva_ctrl_ops,
725 V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE,
726 1, 10000, 1, 3000);
727
728 v4l2_ctrl_new_std(&ctx->ctrl_handler, &hva_ctrl_ops,
729 V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM,
730 0, 1, 1, 0);
731
732 v4l2_ctrl_new_std(&ctx->ctrl_handler, &hva_ctrl_ops,
733 V4L2_CID_MPEG_VIDEO_H264_MIN_QP,
734 0, 51, 1, 5);
735
736 v4l2_ctrl_new_std(&ctx->ctrl_handler, &hva_ctrl_ops,
737 V4L2_CID_MPEG_VIDEO_H264_MAX_QP,
738 0, 51, 1, 51);
739
740 v4l2_ctrl_new_std(&ctx->ctrl_handler, &hva_ctrl_ops,
741 V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE,
742 0, 1, 1, 1);
743
744 mask = ~(1 << V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_1x1);
745 v4l2_ctrl_new_std_menu(&ctx->ctrl_handler, &hva_ctrl_ops,
746 V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC,
747 V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_1x1,
748 mask,
749 V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_1x1);
750
751 v4l2_ctrl_new_std(&ctx->ctrl_handler, &hva_ctrl_ops,
752 V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING,
753 0, 1, 1, 0);
754
755 mask = ~(1 << sei_fp_type);
756 v4l2_ctrl_new_std_menu(&ctx->ctrl_handler, &hva_ctrl_ops,
757 V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE,
758 sei_fp_type,
759 mask,
760 sei_fp_type);
761
762 if (ctx->ctrl_handler.error) {
763 int err = ctx->ctrl_handler.error;
764
765 dev_dbg(dev, "%s controls setup failed (%d)\n",
766 ctx->name, err);
767 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
768 return err;
769 }
770
771 v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
772
773 /* set default time per frame */
774 ctx->ctrls.time_per_frame.numerator = HVA_DEFAULT_FRAME_NUM;
775 ctx->ctrls.time_per_frame.denominator = HVA_DEFAULT_FRAME_DEN;
776
777 return 0;
778 }
779
780 /*
781 * mem-to-mem operations
782 */
783
784 static void hva_run_work(struct work_struct *work)
785 {
786 struct hva_ctx *ctx = container_of(work, struct hva_ctx, run_work);
787 struct vb2_v4l2_buffer *src_buf, *dst_buf;
788 const struct hva_enc *enc = ctx->enc;
789 struct hva_frame *frame;
790 struct hva_stream *stream;
791 int ret;
792
793 /* protect instance against reentrancy */
794 mutex_lock(&ctx->lock);
795
796 src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
797 dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
798
799 frame = to_hva_frame(src_buf);
800 stream = to_hva_stream(dst_buf);
801 frame->vbuf.sequence = ctx->frame_num++;
802
803 ret = enc->encode(ctx, frame, stream);
804
805 vb2_set_plane_payload(&dst_buf->vb2_buf, 0, stream->bytesused);
806 if (ret) {
807 v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_ERROR);
808 v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_ERROR);
809 } else {
810 /* propagate frame timestamp */
811 dst_buf->vb2_buf.timestamp = src_buf->vb2_buf.timestamp;
812 dst_buf->field = V4L2_FIELD_NONE;
813 dst_buf->sequence = ctx->stream_num - 1;
814
815 v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_DONE);
816 v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);
817 }
818
819 mutex_unlock(&ctx->lock);
820
821 v4l2_m2m_job_finish(ctx->hva_dev->m2m_dev, ctx->fh.m2m_ctx);
822 }
823
824 static void hva_device_run(void *priv)
825 {
826 struct hva_ctx *ctx = priv;
827 struct hva_dev *hva = ctx_to_hdev(ctx);
828
829 queue_work(hva->work_queue, &ctx->run_work);
830 }
831
832 static void hva_job_abort(void *priv)
833 {
834 struct hva_ctx *ctx = priv;
835 struct device *dev = ctx_to_dev(ctx);
836
837 dev_dbg(dev, "%s aborting job\n", ctx->name);
838
839 ctx->aborting = true;
840 }
841
842 static int hva_job_ready(void *priv)
843 {
844 struct hva_ctx *ctx = priv;
845 struct device *dev = ctx_to_dev(ctx);
846
847 if (!v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx)) {
848 dev_dbg(dev, "%s job not ready: no frame buffers\n",
849 ctx->name);
850 return 0;
851 }
852
853 if (!v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx)) {
854 dev_dbg(dev, "%s job not ready: no stream buffers\n",
855 ctx->name);
856 return 0;
857 }
858
859 if (ctx->aborting) {
860 dev_dbg(dev, "%s job not ready: aborting\n", ctx->name);
861 return 0;
862 }
863
864 return 1;
865 }
866
867 /* mem-to-mem ops */
868 static const struct v4l2_m2m_ops hva_m2m_ops = {
869 .device_run = hva_device_run,
870 .job_abort = hva_job_abort,
871 .job_ready = hva_job_ready,
872 };
873
874 /*
875 * VB2 queue operations
876 */
877
878 static int hva_queue_setup(struct vb2_queue *vq,
879 unsigned int *num_buffers, unsigned int *num_planes,
880 unsigned int sizes[], struct device *alloc_devs[])
881 {
882 struct hva_ctx *ctx = vb2_get_drv_priv(vq);
883 struct device *dev = ctx_to_dev(ctx);
884 unsigned int size;
885
886 dev_dbg(dev, "%s %s queue setup: num_buffers %d\n", ctx->name,
887 to_type_str(vq->type), *num_buffers);
888
889 size = vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ?
890 ctx->frameinfo.size : ctx->max_stream_size;
891
892 if (*num_planes)
893 return sizes[0] < size ? -EINVAL : 0;
894
895 /* only one plane supported */
896 *num_planes = 1;
897 sizes[0] = size;
898
899 return 0;
900 }
901
902 static int hva_buf_prepare(struct vb2_buffer *vb)
903 {
904 struct hva_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
905 struct device *dev = ctx_to_dev(ctx);
906 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
907
908 if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
909 struct hva_frame *frame = to_hva_frame(vbuf);
910
911 if (vbuf->field == V4L2_FIELD_ANY)
912 vbuf->field = V4L2_FIELD_NONE;
913 if (vbuf->field != V4L2_FIELD_NONE) {
914 dev_dbg(dev,
915 "%s frame[%d] prepare: %d field not supported\n",
916 ctx->name, vb->index, vbuf->field);
917 return -EINVAL;
918 }
919
920 if (!frame->prepared) {
921 /* get memory addresses */
922 frame->vaddr = vb2_plane_vaddr(&vbuf->vb2_buf, 0);
923 frame->paddr = vb2_dma_contig_plane_dma_addr(
924 &vbuf->vb2_buf, 0);
925 frame->info = ctx->frameinfo;
926 frame->prepared = true;
927
928 dev_dbg(dev,
929 "%s frame[%d] prepared; virt=%p, phy=%pad\n",
930 ctx->name, vb->index,
931 frame->vaddr, &frame->paddr);
932 }
933 } else {
934 struct hva_stream *stream = to_hva_stream(vbuf);
935
936 if (!stream->prepared) {
937 /* get memory addresses */
938 stream->vaddr = vb2_plane_vaddr(&vbuf->vb2_buf, 0);
939 stream->paddr = vb2_dma_contig_plane_dma_addr(
940 &vbuf->vb2_buf, 0);
941 stream->size = vb2_plane_size(&vbuf->vb2_buf, 0);
942 stream->prepared = true;
943
944 dev_dbg(dev,
945 "%s stream[%d] prepared; virt=%p, phy=%pad\n",
946 ctx->name, vb->index,
947 stream->vaddr, &stream->paddr);
948 }
949 }
950
951 return 0;
952 }
953
954 static void hva_buf_queue(struct vb2_buffer *vb)
955 {
956 struct hva_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
957 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
958
959 if (ctx->fh.m2m_ctx)
960 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
961 }
962
963 static int hva_start_streaming(struct vb2_queue *vq, unsigned int count)
964 {
965 struct hva_ctx *ctx = vb2_get_drv_priv(vq);
966 struct hva_dev *hva = ctx_to_hdev(ctx);
967 struct device *dev = ctx_to_dev(ctx);
968 struct vb2_v4l2_buffer *vbuf;
969 int ret;
970 unsigned int i;
971 bool found = false;
972
973 dev_dbg(dev, "%s %s start streaming\n", ctx->name,
974 to_type_str(vq->type));
975
976 /* open encoder when both start_streaming have been called */
977 if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
978 if (!vb2_start_streaming_called(&ctx->fh.m2m_ctx->cap_q_ctx.q))
979 return 0;
980 } else {
981 if (!vb2_start_streaming_called(&ctx->fh.m2m_ctx->out_q_ctx.q))
982 return 0;
983 }
984
985 /* store the instance context in the instances array */
986 for (i = 0; i < HVA_MAX_INSTANCES; i++) {
987 if (!hva->instances[i]) {
988 hva->instances[i] = ctx;
989 /* save the context identifier in the context */
990 ctx->id = i;
991 found = true;
992 break;
993 }
994 }
995
996 if (!found) {
997 dev_err(dev, "%s maximum instances reached\n", ctx->name);
998 ret = -ENOMEM;
999 goto err;
1000 }
1001
1002 hva->nb_of_instances++;
1003
1004 if (!ctx->enc) {
1005 ret = hva_open_encoder(ctx,
1006 ctx->streaminfo.streamformat,
1007 ctx->frameinfo.pixelformat,
1008 &ctx->enc);
1009 if (ret < 0)
1010 goto err_ctx;
1011 }
1012
1013 return 0;
1014
1015 err_ctx:
1016 hva->instances[ctx->id] = NULL;
1017 hva->nb_of_instances--;
1018 err:
1019 if (vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1020 /* return of all pending buffers to vb2 (in queued state) */
1021 while ((vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
1022 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_QUEUED);
1023 } else {
1024 /* return of all pending buffers to vb2 (in queued state) */
1025 while ((vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
1026 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_QUEUED);
1027 }
1028
1029 return ret;
1030 }
1031
1032 static void hva_stop_streaming(struct vb2_queue *vq)
1033 {
1034 struct hva_ctx *ctx = vb2_get_drv_priv(vq);
1035 struct hva_dev *hva = ctx_to_hdev(ctx);
1036 struct device *dev = ctx_to_dev(ctx);
1037 const struct hva_enc *enc = ctx->enc;
1038 struct vb2_v4l2_buffer *vbuf;
1039
1040 dev_dbg(dev, "%s %s stop streaming\n", ctx->name,
1041 to_type_str(vq->type));
1042
1043 if (vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1044 /* return of all pending buffers to vb2 (in error state) */
1045 ctx->frame_num = 0;
1046 while ((vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
1047 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
1048 } else {
1049 /* return of all pending buffers to vb2 (in error state) */
1050 ctx->stream_num = 0;
1051 while ((vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
1052 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
1053 }
1054
1055 if ((V4L2_TYPE_IS_OUTPUT(vq->type) &&
1056 vb2_is_streaming(&ctx->fh.m2m_ctx->cap_q_ctx.q)) ||
1057 (!V4L2_TYPE_IS_OUTPUT(vq->type) &&
1058 vb2_is_streaming(&ctx->fh.m2m_ctx->out_q_ctx.q))) {
1059 dev_dbg(dev, "%s %s out=%d cap=%d\n",
1060 ctx->name, to_type_str(vq->type),
1061 vb2_is_streaming(&ctx->fh.m2m_ctx->out_q_ctx.q),
1062 vb2_is_streaming(&ctx->fh.m2m_ctx->cap_q_ctx.q));
1063 return;
1064 }
1065
1066 /* close encoder when both stop_streaming have been called */
1067 if (enc) {
1068 dev_dbg(dev, "%s %s encoder closed\n", ctx->name, enc->name);
1069 enc->close(ctx);
1070 ctx->enc = NULL;
1071
1072 /* clear instance context in instances array */
1073 hva->instances[ctx->id] = NULL;
1074 hva->nb_of_instances--;
1075 }
1076
1077 ctx->aborting = false;
1078 }
1079
1080 /* VB2 queue ops */
1081 static const struct vb2_ops hva_qops = {
1082 .queue_setup = hva_queue_setup,
1083 .buf_prepare = hva_buf_prepare,
1084 .buf_queue = hva_buf_queue,
1085 .start_streaming = hva_start_streaming,
1086 .stop_streaming = hva_stop_streaming,
1087 .wait_prepare = vb2_ops_wait_prepare,
1088 .wait_finish = vb2_ops_wait_finish,
1089 };
1090
1091 /*
1092 * V4L2 file operations
1093 */
1094
1095 static int queue_init(struct hva_ctx *ctx, struct vb2_queue *vq)
1096 {
1097 vq->io_modes = VB2_MMAP | VB2_DMABUF;
1098 vq->drv_priv = ctx;
1099 vq->ops = &hva_qops;
1100 vq->mem_ops = &vb2_dma_contig_memops;
1101 vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1102 vq->lock = &ctx->hva_dev->lock;
1103
1104 return vb2_queue_init(vq);
1105 }
1106
1107 static int hva_queue_init(void *priv, struct vb2_queue *src_vq,
1108 struct vb2_queue *dst_vq)
1109 {
1110 struct hva_ctx *ctx = priv;
1111 int ret;
1112
1113 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1114 src_vq->buf_struct_size = sizeof(struct hva_frame);
1115 src_vq->min_buffers_needed = MIN_FRAMES;
1116 src_vq->dev = ctx->hva_dev->dev;
1117
1118 ret = queue_init(ctx, src_vq);
1119 if (ret)
1120 return ret;
1121
1122 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1123 dst_vq->buf_struct_size = sizeof(struct hva_stream);
1124 dst_vq->min_buffers_needed = MIN_STREAMS;
1125 dst_vq->dev = ctx->hva_dev->dev;
1126
1127 return queue_init(ctx, dst_vq);
1128 }
1129
1130 static int hva_open(struct file *file)
1131 {
1132 struct hva_dev *hva = video_drvdata(file);
1133 struct device *dev = hva_to_dev(hva);
1134 struct hva_ctx *ctx;
1135 int ret;
1136
1137 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1138 if (!ctx) {
1139 ret = -ENOMEM;
1140 goto out;
1141 }
1142 ctx->hva_dev = hva;
1143
1144 INIT_WORK(&ctx->run_work, hva_run_work);
1145 v4l2_fh_init(&ctx->fh, video_devdata(file));
1146 file->private_data = &ctx->fh;
1147 v4l2_fh_add(&ctx->fh);
1148
1149 ret = hva_ctrls_setup(ctx);
1150 if (ret) {
1151 dev_err(dev, "%s [x:x] failed to setup controls\n",
1152 HVA_PREFIX);
1153 goto err_fh;
1154 }
1155 ctx->fh.ctrl_handler = &ctx->ctrl_handler;
1156
1157 mutex_init(&ctx->lock);
1158
1159 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(hva->m2m_dev, ctx,
1160 &hva_queue_init);
1161 if (IS_ERR(ctx->fh.m2m_ctx)) {
1162 ret = PTR_ERR(ctx->fh.m2m_ctx);
1163 dev_err(dev, "%s failed to initialize m2m context (%d)\n",
1164 HVA_PREFIX, ret);
1165 goto err_ctrls;
1166 }
1167
1168 /* set the instance name */
1169 mutex_lock(&hva->lock);
1170 hva->instance_id++;
1171 snprintf(ctx->name, sizeof(ctx->name), "[%3d:----]",
1172 hva->instance_id);
1173 mutex_unlock(&hva->lock);
1174
1175 /* default parameters for frame and stream */
1176 set_default_params(ctx);
1177
1178 dev_info(dev, "%s encoder instance created\n", ctx->name);
1179
1180 return 0;
1181
1182 err_ctrls:
1183 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
1184 err_fh:
1185 v4l2_fh_del(&ctx->fh);
1186 v4l2_fh_exit(&ctx->fh);
1187 kfree(ctx);
1188 out:
1189 return ret;
1190 }
1191
1192 static int hva_release(struct file *file)
1193 {
1194 struct hva_ctx *ctx = fh_to_ctx(file->private_data);
1195 struct hva_dev *hva = ctx_to_hdev(ctx);
1196 struct device *dev = ctx_to_dev(ctx);
1197 const struct hva_enc *enc = ctx->enc;
1198
1199 if (enc) {
1200 dev_dbg(dev, "%s %s encoder closed\n", ctx->name, enc->name);
1201 enc->close(ctx);
1202 ctx->enc = NULL;
1203
1204 /* clear instance context in instances array */
1205 hva->instances[ctx->id] = NULL;
1206 hva->nb_of_instances--;
1207 }
1208
1209 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
1210
1211 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
1212
1213 v4l2_fh_del(&ctx->fh);
1214 v4l2_fh_exit(&ctx->fh);
1215
1216 dev_info(dev, "%s encoder instance released\n", ctx->name);
1217
1218 kfree(ctx);
1219
1220 return 0;
1221 }
1222
1223 /* V4L2 file ops */
1224 static const struct v4l2_file_operations hva_fops = {
1225 .owner = THIS_MODULE,
1226 .open = hva_open,
1227 .release = hva_release,
1228 .unlocked_ioctl = video_ioctl2,
1229 .mmap = v4l2_m2m_fop_mmap,
1230 .poll = v4l2_m2m_fop_poll,
1231 };
1232
1233 /*
1234 * Platform device operations
1235 */
1236
1237 static int hva_register_device(struct hva_dev *hva)
1238 {
1239 int ret;
1240 struct video_device *vdev;
1241 struct device *dev;
1242
1243 if (!hva)
1244 return -ENODEV;
1245 dev = hva_to_dev(hva);
1246
1247 hva->m2m_dev = v4l2_m2m_init(&hva_m2m_ops);
1248 if (IS_ERR(hva->m2m_dev)) {
1249 dev_err(dev, "%s failed to initialize v4l2-m2m device\n",
1250 HVA_PREFIX);
1251 ret = PTR_ERR(hva->m2m_dev);
1252 goto err;
1253 }
1254
1255 vdev = video_device_alloc();
1256 if (!vdev) {
1257 dev_err(dev, "%s failed to allocate video device\n",
1258 HVA_PREFIX);
1259 ret = -ENOMEM;
1260 goto err_m2m_release;
1261 }
1262
1263 vdev->fops = &hva_fops;
1264 vdev->ioctl_ops = &hva_ioctl_ops;
1265 vdev->release = video_device_release;
1266 vdev->lock = &hva->lock;
1267 vdev->vfl_dir = VFL_DIR_M2M;
1268 vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
1269 vdev->v4l2_dev = &hva->v4l2_dev;
1270 snprintf(vdev->name, sizeof(vdev->name), "%s%lx", HVA_NAME,
1271 hva->ip_version);
1272
1273 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1274 if (ret) {
1275 dev_err(dev, "%s failed to register video device\n",
1276 HVA_PREFIX);
1277 goto err_vdev_release;
1278 }
1279
1280 hva->vdev = vdev;
1281 video_set_drvdata(vdev, hva);
1282 return 0;
1283
1284 err_vdev_release:
1285 video_device_release(vdev);
1286 err_m2m_release:
1287 v4l2_m2m_release(hva->m2m_dev);
1288 err:
1289 return ret;
1290 }
1291
1292 static void hva_unregister_device(struct hva_dev *hva)
1293 {
1294 if (!hva)
1295 return;
1296
1297 if (hva->m2m_dev)
1298 v4l2_m2m_release(hva->m2m_dev);
1299
1300 video_unregister_device(hva->vdev);
1301 }
1302
1303 static int hva_probe(struct platform_device *pdev)
1304 {
1305 struct hva_dev *hva;
1306 struct device *dev = &pdev->dev;
1307 int ret;
1308
1309 hva = devm_kzalloc(dev, sizeof(*hva), GFP_KERNEL);
1310 if (!hva) {
1311 ret = -ENOMEM;
1312 goto err;
1313 }
1314
1315 hva->dev = dev;
1316 hva->pdev = pdev;
1317 platform_set_drvdata(pdev, hva);
1318
1319 mutex_init(&hva->lock);
1320
1321 /* probe hardware */
1322 ret = hva_hw_probe(pdev, hva);
1323 if (ret)
1324 goto err;
1325
1326 /* register all available encoders */
1327 register_encoders(hva);
1328
1329 /* register all supported formats */
1330 register_formats(hva);
1331
1332 /* register on V4L2 */
1333 ret = v4l2_device_register(dev, &hva->v4l2_dev);
1334 if (ret) {
1335 dev_err(dev, "%s %s failed to register V4L2 device\n",
1336 HVA_PREFIX, HVA_NAME);
1337 goto err_hw;
1338 }
1339
1340 hva->work_queue = create_workqueue(HVA_NAME);
1341 if (!hva->work_queue) {
1342 dev_err(dev, "%s %s failed to allocate work queue\n",
1343 HVA_PREFIX, HVA_NAME);
1344 ret = -ENOMEM;
1345 goto err_v4l2;
1346 }
1347
1348 /* register device */
1349 ret = hva_register_device(hva);
1350 if (ret)
1351 goto err_work_queue;
1352
1353 dev_info(dev, "%s %s registered as /dev/video%d\n", HVA_PREFIX,
1354 HVA_NAME, hva->vdev->num);
1355
1356 return 0;
1357
1358 err_work_queue:
1359 destroy_workqueue(hva->work_queue);
1360 err_v4l2:
1361 v4l2_device_unregister(&hva->v4l2_dev);
1362 err_hw:
1363 hva_hw_remove(hva);
1364 err:
1365 return ret;
1366 }
1367
1368 static int hva_remove(struct platform_device *pdev)
1369 {
1370 struct hva_dev *hva = platform_get_drvdata(pdev);
1371 struct device *dev = hva_to_dev(hva);
1372
1373 hva_unregister_device(hva);
1374
1375 destroy_workqueue(hva->work_queue);
1376
1377 hva_hw_remove(hva);
1378
1379 v4l2_device_unregister(&hva->v4l2_dev);
1380
1381 dev_info(dev, "%s %s removed\n", HVA_PREFIX, pdev->name);
1382
1383 return 0;
1384 }
1385
1386 /* PM ops */
1387 static const struct dev_pm_ops hva_pm_ops = {
1388 .runtime_suspend = hva_hw_runtime_suspend,
1389 .runtime_resume = hva_hw_runtime_resume,
1390 };
1391
1392 static const struct of_device_id hva_match_types[] = {
1393 {
1394 .compatible = "st,st-hva",
1395 },
1396 { /* end node */ }
1397 };
1398
1399 MODULE_DEVICE_TABLE(of, hva_match_types);
1400
1401 struct platform_driver hva_driver = {
1402 .probe = hva_probe,
1403 .remove = hva_remove,
1404 .driver = {
1405 .name = HVA_NAME,
1406 .of_match_table = hva_match_types,
1407 .pm = &hva_pm_ops,
1408 },
1409 };
1410
1411 module_platform_driver(hva_driver);
1412
1413 MODULE_LICENSE("GPL");
1414 MODULE_AUTHOR("Yannick Fertre <yannick.fertre@st.com>");
1415 MODULE_DESCRIPTION("STMicroelectronics HVA video encoder V4L2 driver");
Linux kernel - Deliverables
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