1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) STMicroelectronics SA 2015
4 * Authors: Hugues Fruchet <hugues.fruchet@st.com>
5 * Jean-Christophe Trotin <jean-christophe.trotin@st.com>
6 * for STMicroelectronics.
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/pm_runtime.h>
13 #include <linux/slab.h>
15 #include <media/v4l2-ioctl.h>
16 #include <media/v4l2-event.h>
17 #include <media/videobuf2-dma-contig.h>
20 #include "delta-debug.h"
21 #include "delta-ipc.h"
23 #define DELTA_NAME "st-delta"
25 #define DELTA_PREFIX "[---:----]"
27 #define to_ctx(__fh) container_of(__fh, struct delta_ctx, fh)
28 #define to_au(__vbuf) container_of(__vbuf, struct delta_au, vbuf)
29 #define to_frame(__vbuf) container_of(__vbuf, struct delta_frame, vbuf)
31 #define call_dec_op(dec, op, args...)\
32 ((dec && (dec)->op) ? (dec)->op(args) : 0)
34 /* registry of available decoders */
35 static const struct delta_dec *delta_decoders[] = {
36 #ifdef CONFIG_VIDEO_STI_DELTA_MJPEG
41 static inline int frame_size(u32 w, u32 h, u32 fmt)
44 case V4L2_PIX_FMT_NV12:
45 return (w * h * 3) / 2;
51 static inline int frame_stride(u32 w, u32 fmt)
54 case V4L2_PIX_FMT_NV12:
61 static void dump_au(struct delta_ctx *ctx, struct delta_au *au)
63 struct delta_dev *delta = ctx->dev;
64 u32 size = 10; /* dump first & last 10 bytes */
65 u8 *data = (u8 *)(au->vaddr);
67 if (au->size <= (size * 2))
68 dev_dbg(delta->dev, "%s dump au[%d] dts=%lld size=%d data=%*ph\n",
69 ctx->name, au->vbuf.vb2_buf.index, au->dts, au->size,
72 dev_dbg(delta->dev, "%s dump au[%d] dts=%lld size=%d data=%*ph..%*ph\n",
73 ctx->name, au->vbuf.vb2_buf.index, au->dts, au->size,
74 size, data, size, data + au->size - size);
77 static void dump_frame(struct delta_ctx *ctx, struct delta_frame *frame)
79 struct delta_dev *delta = ctx->dev;
80 u32 size = 10; /* dump first 10 bytes */
81 u8 *data = (u8 *)(frame->vaddr);
83 dev_dbg(delta->dev, "%s dump frame[%d] dts=%lld type=%s field=%s data=%*ph\n",
84 ctx->name, frame->index, frame->dts,
85 frame_type_str(frame->flags),
86 frame_field_str(frame->field),
90 static void delta_au_done(struct delta_ctx *ctx, struct delta_au *au, int err)
92 struct vb2_v4l2_buffer *vbuf;
95 vbuf->sequence = ctx->au_num++;
96 v4l2_m2m_buf_done(vbuf, err ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
99 static void delta_frame_done(struct delta_ctx *ctx, struct delta_frame *frame,
102 struct vb2_v4l2_buffer *vbuf;
104 dump_frame(ctx, frame);
106 /* decoded frame is now output to user */
107 frame->state |= DELTA_FRAME_OUT;
110 vbuf->sequence = ctx->frame_num++;
111 v4l2_m2m_buf_done(vbuf, err ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
113 if (frame->info.size) /* ignore EOS */
114 ctx->output_frames++;
117 static void requeue_free_frames(struct delta_ctx *ctx)
119 struct vb2_v4l2_buffer *vbuf;
120 struct delta_frame *frame;
123 /* requeue all free frames */
124 for (i = 0; i < ctx->nb_of_frames; i++) {
125 frame = ctx->frames[i];
126 if (frame->state == DELTA_FRAME_FREE) {
128 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
129 frame->state = DELTA_FRAME_M2M;
134 static int delta_recycle(struct delta_ctx *ctx, struct delta_frame *frame)
136 const struct delta_dec *dec = ctx->dec;
138 /* recycle frame on decoder side */
139 call_dec_op(dec, recycle, ctx, frame);
141 /* this frame is no more output */
142 frame->state &= ~DELTA_FRAME_OUT;
144 /* requeue free frame */
145 if (frame->state == DELTA_FRAME_FREE) {
146 struct vb2_v4l2_buffer *vbuf = &frame->vbuf;
148 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
149 frame->state = DELTA_FRAME_M2M;
152 /* reset other frame fields */
159 static void delta_push_dts(struct delta_ctx *ctx, u64 val)
161 struct delta_dts *dts;
163 dts = kzalloc(sizeof(*dts), GFP_KERNEL);
167 INIT_LIST_HEAD(&dts->list);
170 * protected by global lock acquired
171 * by V4L2 when calling delta_vb2_au_queue
174 list_add_tail(&dts->list, &ctx->dts);
177 static void delta_pop_dts(struct delta_ctx *ctx, u64 *val)
179 struct delta_dev *delta = ctx->dev;
180 struct delta_dts *dts;
183 * protected by global lock acquired
184 * by V4L2 when calling delta_vb2_au_queue
186 if (list_empty(&ctx->dts)) {
187 dev_warn(delta->dev, "%s no dts to pop ... output dts = 0\n",
193 dts = list_first_entry(&ctx->dts, struct delta_dts, list);
194 list_del(&dts->list);
201 static void delta_flush_dts(struct delta_ctx *ctx)
203 struct delta_dts *dts;
204 struct delta_dts *next;
207 * protected by global lock acquired
208 * by V4L2 when calling delta_vb2_au_queue
211 /* free all pending dts */
212 list_for_each_entry_safe(dts, next, &ctx->dts, list)
216 INIT_LIST_HEAD(&ctx->dts);
219 static inline int frame_alignment(u32 fmt)
222 case V4L2_PIX_FMT_NV12:
223 case V4L2_PIX_FMT_NV21:
231 static inline int estimated_au_size(u32 w, u32 h)
234 * for a MJPEG stream encoded from YUV422 pixel format,
235 * assuming a compression ratio of 2, the maximum size
236 * of an access unit is (width x height x 2) / 2,
237 * so (width x height)
242 static void set_default_params(struct delta_ctx *ctx)
244 struct delta_frameinfo *frameinfo = &ctx->frameinfo;
245 struct delta_streaminfo *streaminfo = &ctx->streaminfo;
247 memset(frameinfo, 0, sizeof(*frameinfo));
248 frameinfo->pixelformat = V4L2_PIX_FMT_NV12;
249 frameinfo->width = DELTA_DEFAULT_WIDTH;
250 frameinfo->height = DELTA_DEFAULT_HEIGHT;
251 frameinfo->aligned_width = ALIGN(frameinfo->width,
252 DELTA_WIDTH_ALIGNMENT);
253 frameinfo->aligned_height = ALIGN(frameinfo->height,
254 DELTA_HEIGHT_ALIGNMENT);
255 frameinfo->size = frame_size(frameinfo->aligned_width,
256 frameinfo->aligned_height,
257 frameinfo->pixelformat);
258 frameinfo->field = V4L2_FIELD_NONE;
259 frameinfo->colorspace = V4L2_COLORSPACE_REC709;
260 frameinfo->xfer_func = V4L2_XFER_FUNC_DEFAULT;
261 frameinfo->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
262 frameinfo->quantization = V4L2_QUANTIZATION_DEFAULT;
264 memset(streaminfo, 0, sizeof(*streaminfo));
265 streaminfo->streamformat = DELTA_DEFAULT_STREAMFORMAT;
266 streaminfo->width = DELTA_DEFAULT_WIDTH;
267 streaminfo->height = DELTA_DEFAULT_HEIGHT;
268 streaminfo->field = V4L2_FIELD_NONE;
269 streaminfo->colorspace = V4L2_COLORSPACE_REC709;
270 streaminfo->xfer_func = V4L2_XFER_FUNC_DEFAULT;
271 streaminfo->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
272 streaminfo->quantization = V4L2_QUANTIZATION_DEFAULT;
274 ctx->max_au_size = estimated_au_size(streaminfo->width,
278 static const struct delta_dec *delta_find_decoder(struct delta_ctx *ctx,
282 struct delta_dev *delta = ctx->dev;
283 const struct delta_dec *dec;
286 for (i = 0; i < delta->nb_of_decoders; i++) {
287 dec = delta->decoders[i];
288 if ((dec->pixelformat == pixelformat) &&
289 (dec->streamformat == streamformat))
296 static void register_format(u32 format, u32 formats[], u32 *nb_of_formats)
300 for (i = 0; i < *nb_of_formats; i++) {
301 if (format == formats[i])
305 formats[(*nb_of_formats)++] = format;
308 static void register_formats(struct delta_dev *delta)
312 for (i = 0; i < delta->nb_of_decoders; i++) {
313 register_format(delta->decoders[i]->pixelformat,
315 &delta->nb_of_pixelformats);
317 register_format(delta->decoders[i]->streamformat,
318 delta->streamformats,
319 &delta->nb_of_streamformats);
323 static void register_decoders(struct delta_dev *delta)
327 for (i = 0; i < ARRAY_SIZE(delta_decoders); i++) {
328 if (delta->nb_of_decoders >= DELTA_MAX_DECODERS) {
330 "%s failed to register %s decoder (%d maximum reached)\n",
331 DELTA_PREFIX, delta_decoders[i]->name,
336 delta->decoders[delta->nb_of_decoders++] = delta_decoders[i];
337 dev_info(delta->dev, "%s %s decoder registered\n",
338 DELTA_PREFIX, delta_decoders[i]->name);
342 static int delta_open_decoder(struct delta_ctx *ctx, u32 streamformat,
343 u32 pixelformat, const struct delta_dec **pdec)
345 struct delta_dev *delta = ctx->dev;
346 const struct delta_dec *dec;
349 dec = delta_find_decoder(ctx, streamformat, ctx->frameinfo.pixelformat);
351 dev_err(delta->dev, "%s no decoder found matching %4.4s => %4.4s\n",
352 ctx->name, (char *)&streamformat, (char *)&pixelformat);
356 dev_dbg(delta->dev, "%s one decoder matching %4.4s => %4.4s\n",
357 ctx->name, (char *)&streamformat, (char *)&pixelformat);
359 /* update instance name */
360 snprintf(ctx->name, sizeof(ctx->name), "[%3d:%4.4s]",
361 delta->instance_id, (char *)&streamformat);
363 /* open decoder instance */
364 ret = call_dec_op(dec, open, ctx);
366 dev_err(delta->dev, "%s failed to open decoder instance (%d)\n",
371 dev_dbg(delta->dev, "%s %s decoder opened\n", ctx->name, dec->name);
379 * V4L2 ioctl operations
382 static int delta_querycap(struct file *file, void *priv,
383 struct v4l2_capability *cap)
385 struct delta_ctx *ctx = to_ctx(file->private_data);
386 struct delta_dev *delta = ctx->dev;
388 strlcpy(cap->driver, DELTA_NAME, sizeof(cap->driver));
389 strlcpy(cap->card, delta->vdev->name, sizeof(cap->card));
390 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
396 static int delta_enum_fmt_stream(struct file *file, void *priv,
397 struct v4l2_fmtdesc *f)
399 struct delta_ctx *ctx = to_ctx(file->private_data);
400 struct delta_dev *delta = ctx->dev;
402 if (unlikely(f->index >= delta->nb_of_streamformats))
405 f->pixelformat = delta->streamformats[f->index];
410 static int delta_enum_fmt_frame(struct file *file, void *priv,
411 struct v4l2_fmtdesc *f)
413 struct delta_ctx *ctx = to_ctx(file->private_data);
414 struct delta_dev *delta = ctx->dev;
416 if (unlikely(f->index >= delta->nb_of_pixelformats))
419 f->pixelformat = delta->pixelformats[f->index];
424 static int delta_g_fmt_stream(struct file *file, void *fh,
425 struct v4l2_format *f)
427 struct delta_ctx *ctx = to_ctx(file->private_data);
428 struct delta_dev *delta = ctx->dev;
429 struct v4l2_pix_format *pix = &f->fmt.pix;
430 struct delta_streaminfo *streaminfo = &ctx->streaminfo;
431 unsigned char str[100] = "";
433 if (!(ctx->flags & DELTA_FLAG_STREAMINFO))
435 "%s V4L2 GET_FMT (OUTPUT): no stream information available, default to %s\n",
437 delta_streaminfo_str(streaminfo, str, sizeof(str)));
439 pix->pixelformat = streaminfo->streamformat;
440 pix->width = streaminfo->width;
441 pix->height = streaminfo->height;
442 pix->field = streaminfo->field;
443 pix->bytesperline = 0;
444 pix->sizeimage = ctx->max_au_size;
445 pix->colorspace = streaminfo->colorspace;
446 pix->xfer_func = streaminfo->xfer_func;
447 pix->ycbcr_enc = streaminfo->ycbcr_enc;
448 pix->quantization = streaminfo->quantization;
453 static int delta_g_fmt_frame(struct file *file, void *fh, struct v4l2_format *f)
455 struct delta_ctx *ctx = to_ctx(file->private_data);
456 struct delta_dev *delta = ctx->dev;
457 struct v4l2_pix_format *pix = &f->fmt.pix;
458 struct delta_frameinfo *frameinfo = &ctx->frameinfo;
459 struct delta_streaminfo *streaminfo = &ctx->streaminfo;
460 unsigned char str[100] = "";
462 if (!(ctx->flags & DELTA_FLAG_FRAMEINFO))
464 "%s V4L2 GET_FMT (CAPTURE): no frame information available, default to %s\n",
466 delta_frameinfo_str(frameinfo, str, sizeof(str)));
468 pix->pixelformat = frameinfo->pixelformat;
469 pix->width = frameinfo->aligned_width;
470 pix->height = frameinfo->aligned_height;
471 pix->field = frameinfo->field;
472 pix->bytesperline = frame_stride(frameinfo->aligned_width,
473 frameinfo->pixelformat);
474 pix->sizeimage = frameinfo->size;
476 if (ctx->flags & DELTA_FLAG_STREAMINFO) {
477 /* align colorspace & friends on stream ones if any set */
478 frameinfo->colorspace = streaminfo->colorspace;
479 frameinfo->xfer_func = streaminfo->xfer_func;
480 frameinfo->ycbcr_enc = streaminfo->ycbcr_enc;
481 frameinfo->quantization = streaminfo->quantization;
483 pix->colorspace = frameinfo->colorspace;
484 pix->xfer_func = frameinfo->xfer_func;
485 pix->ycbcr_enc = frameinfo->ycbcr_enc;
486 pix->quantization = frameinfo->quantization;
491 static int delta_try_fmt_stream(struct file *file, void *priv,
492 struct v4l2_format *f)
494 struct delta_ctx *ctx = to_ctx(file->private_data);
495 struct delta_dev *delta = ctx->dev;
496 struct v4l2_pix_format *pix = &f->fmt.pix;
497 u32 streamformat = pix->pixelformat;
498 const struct delta_dec *dec;
502 dec = delta_find_decoder(ctx, streamformat, ctx->frameinfo.pixelformat);
505 "%s V4L2 TRY_FMT (OUTPUT): unsupported format %4.4s\n",
506 ctx->name, (char *)&pix->pixelformat);
510 /* adjust width & height */
512 height = pix->height;
513 v4l_bound_align_image
516 dec->max_width ? dec->max_width : DELTA_MAX_WIDTH,
520 dec->max_height ? dec->max_height : DELTA_MAX_HEIGHT,
523 if ((pix->width != width) || (pix->height != height))
525 "%s V4L2 TRY_FMT (OUTPUT): resolution updated %dx%d -> %dx%d to fit min/max/alignment\n",
526 ctx->name, width, height,
527 pix->width, pix->height);
529 au_size = estimated_au_size(pix->width, pix->height);
530 if (pix->sizeimage < au_size) {
532 "%s V4L2 TRY_FMT (OUTPUT): size updated %d -> %d to fit estimated size\n",
533 ctx->name, pix->sizeimage, au_size);
534 pix->sizeimage = au_size;
537 pix->bytesperline = 0;
539 if (pix->field == V4L2_FIELD_ANY)
540 pix->field = V4L2_FIELD_NONE;
545 static int delta_try_fmt_frame(struct file *file, void *priv,
546 struct v4l2_format *f)
548 struct delta_ctx *ctx = to_ctx(file->private_data);
549 struct delta_dev *delta = ctx->dev;
550 struct v4l2_pix_format *pix = &f->fmt.pix;
551 u32 pixelformat = pix->pixelformat;
552 const struct delta_dec *dec;
555 dec = delta_find_decoder(ctx, ctx->streaminfo.streamformat,
559 "%s V4L2 TRY_FMT (CAPTURE): unsupported format %4.4s\n",
560 ctx->name, (char *)&pixelformat);
564 /* adjust width & height */
566 height = pix->height;
567 v4l_bound_align_image(&pix->width,
568 DELTA_MIN_WIDTH, DELTA_MAX_WIDTH,
569 frame_alignment(pixelformat) - 1,
571 DELTA_MIN_HEIGHT, DELTA_MAX_HEIGHT,
572 frame_alignment(pixelformat) - 1, 0);
574 if ((pix->width != width) || (pix->height != height))
576 "%s V4L2 TRY_FMT (CAPTURE): resolution updated %dx%d -> %dx%d to fit min/max/alignment\n",
577 ctx->name, width, height, pix->width, pix->height);
579 /* default decoder alignment constraint */
580 width = ALIGN(pix->width, DELTA_WIDTH_ALIGNMENT);
581 height = ALIGN(pix->height, DELTA_HEIGHT_ALIGNMENT);
582 if ((pix->width != width) || (pix->height != height))
584 "%s V4L2 TRY_FMT (CAPTURE): resolution updated %dx%d -> %dx%d to fit decoder alignment\n",
585 ctx->name, width, height, pix->width, pix->height);
587 if (!pix->colorspace) {
588 pix->colorspace = V4L2_COLORSPACE_REC709;
589 pix->xfer_func = V4L2_XFER_FUNC_DEFAULT;
590 pix->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
591 pix->quantization = V4L2_QUANTIZATION_DEFAULT;
595 pix->height = height;
596 pix->bytesperline = frame_stride(pix->width, pixelformat);
597 pix->sizeimage = frame_size(pix->width, pix->height, pixelformat);
599 if (pix->field == V4L2_FIELD_ANY)
600 pix->field = V4L2_FIELD_NONE;
605 static int delta_s_fmt_stream(struct file *file, void *fh,
606 struct v4l2_format *f)
608 struct delta_ctx *ctx = to_ctx(file->private_data);
609 struct delta_dev *delta = ctx->dev;
610 struct vb2_queue *vq;
611 struct v4l2_pix_format *pix = &f->fmt.pix;
614 ret = delta_try_fmt_stream(file, fh, f);
617 "%s V4L2 S_FMT (OUTPUT): unsupported format %4.4s\n",
618 ctx->name, (char *)&pix->pixelformat);
622 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
623 if (vb2_is_streaming(vq)) {
624 dev_dbg(delta->dev, "%s V4L2 S_FMT (OUTPUT): queue busy\n",
629 ctx->max_au_size = pix->sizeimage;
630 ctx->streaminfo.width = pix->width;
631 ctx->streaminfo.height = pix->height;
632 ctx->streaminfo.streamformat = pix->pixelformat;
633 ctx->streaminfo.colorspace = pix->colorspace;
634 ctx->streaminfo.xfer_func = pix->xfer_func;
635 ctx->streaminfo.ycbcr_enc = pix->ycbcr_enc;
636 ctx->streaminfo.quantization = pix->quantization;
637 ctx->flags |= DELTA_FLAG_STREAMINFO;
642 static int delta_s_fmt_frame(struct file *file, void *fh, struct v4l2_format *f)
644 struct delta_ctx *ctx = to_ctx(file->private_data);
645 struct delta_dev *delta = ctx->dev;
646 const struct delta_dec *dec = ctx->dec;
647 struct v4l2_pix_format *pix = &f->fmt.pix;
648 struct delta_frameinfo frameinfo;
649 unsigned char str[100] = "";
650 struct vb2_queue *vq;
653 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
654 if (vb2_is_streaming(vq)) {
655 dev_dbg(delta->dev, "%s V4L2 S_FMT (CAPTURE): queue busy\n",
660 if (ctx->state < DELTA_STATE_READY) {
662 * decoder not yet opened and valid stream header not found,
663 * could not negotiate format with decoder, check at least
664 * pixel format & negotiate resolution boundaries
667 ret = delta_try_fmt_frame(file, fh, f);
670 "%s V4L2 S_FMT (CAPTURE): unsupported format %4.4s\n",
671 ctx->name, (char *)&pix->pixelformat);
678 /* set frame information to decoder */
679 memset(&frameinfo, 0, sizeof(frameinfo));
680 frameinfo.pixelformat = pix->pixelformat;
681 frameinfo.width = pix->width;
682 frameinfo.height = pix->height;
683 frameinfo.aligned_width = pix->width;
684 frameinfo.aligned_height = pix->height;
685 frameinfo.size = pix->sizeimage;
686 frameinfo.field = pix->field;
687 frameinfo.colorspace = pix->colorspace;
688 frameinfo.xfer_func = pix->xfer_func;
689 frameinfo.ycbcr_enc = pix->ycbcr_enc;
690 frameinfo.quantization = pix->quantization;
691 ret = call_dec_op(dec, set_frameinfo, ctx, &frameinfo);
695 /* then get what decoder can really do */
696 ret = call_dec_op(dec, get_frameinfo, ctx, &frameinfo);
700 ctx->flags |= DELTA_FLAG_FRAMEINFO;
701 ctx->frameinfo = frameinfo;
703 "%s V4L2 SET_FMT (CAPTURE): frameinfo updated to %s\n",
705 delta_frameinfo_str(&frameinfo, str, sizeof(str)));
707 pix->pixelformat = frameinfo.pixelformat;
708 pix->width = frameinfo.aligned_width;
709 pix->height = frameinfo.aligned_height;
710 pix->bytesperline = frame_stride(pix->width, pix->pixelformat);
711 pix->sizeimage = frameinfo.size;
712 pix->field = frameinfo.field;
713 pix->colorspace = frameinfo.colorspace;
714 pix->xfer_func = frameinfo.xfer_func;
715 pix->ycbcr_enc = frameinfo.ycbcr_enc;
716 pix->quantization = frameinfo.quantization;
721 static int delta_g_selection(struct file *file, void *fh,
722 struct v4l2_selection *s)
724 struct delta_ctx *ctx = to_ctx(fh);
725 struct delta_frameinfo *frameinfo = &ctx->frameinfo;
726 struct v4l2_rect crop;
728 if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
731 if ((ctx->flags & DELTA_FLAG_FRAMEINFO) &&
732 (frameinfo->flags & DELTA_FRAMEINFO_FLAG_CROP)) {
733 crop = frameinfo->crop;
735 /* default to video dimensions */
738 crop.width = frameinfo->width;
739 crop.height = frameinfo->height;
743 case V4L2_SEL_TGT_COMPOSE:
744 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
745 /* visible area inside video */
748 case V4L2_SEL_TGT_COMPOSE_PADDED:
749 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
750 /* up to aligned dimensions */
753 s->r.width = frameinfo->aligned_width;
754 s->r.height = frameinfo->aligned_height;
763 static void delta_complete_eos(struct delta_ctx *ctx,
764 struct delta_frame *frame)
766 struct delta_dev *delta = ctx->dev;
767 const struct v4l2_event ev = {.type = V4L2_EVENT_EOS};
771 * - by returning an empty frame flagged to V4L2_BUF_FLAG_LAST
772 * - and then send EOS event
776 frame->info.size = 0;
778 /* set the last buffer flag */
779 frame->flags |= V4L2_BUF_FLAG_LAST;
781 /* release frame to user */
782 delta_frame_done(ctx, frame, 0);
785 v4l2_event_queue_fh(&ctx->fh, &ev);
787 dev_dbg(delta->dev, "%s EOS completed\n", ctx->name);
790 static int delta_try_decoder_cmd(struct file *file, void *fh,
791 struct v4l2_decoder_cmd *cmd)
793 if (cmd->cmd != V4L2_DEC_CMD_STOP)
796 if (cmd->flags & V4L2_DEC_CMD_STOP_TO_BLACK)
799 if (!(cmd->flags & V4L2_DEC_CMD_STOP_IMMEDIATELY) &&
800 (cmd->stop.pts != 0))
806 static int delta_decoder_stop_cmd(struct delta_ctx *ctx, void *fh)
808 const struct delta_dec *dec = ctx->dec;
809 struct delta_dev *delta = ctx->dev;
810 struct delta_frame *frame = NULL;
813 dev_dbg(delta->dev, "%s EOS received\n", ctx->name);
815 if (ctx->state != DELTA_STATE_READY)
818 /* drain the decoder */
819 call_dec_op(dec, drain, ctx);
821 /* release to user drained frames */
824 ret = call_dec_op(dec, get_frame, ctx, &frame);
825 if (ret == -ENODATA) {
826 /* no more decoded frames */
830 dev_dbg(delta->dev, "%s drain frame[%d]\n",
831 ctx->name, frame->index);
833 /* pop timestamp and mark frame with it */
834 delta_pop_dts(ctx, &frame->dts);
836 /* release decoded frame to user */
837 delta_frame_done(ctx, frame, 0);
841 /* try to complete EOS */
842 ret = delta_get_free_frame(ctx, &frame);
846 /* new frame available, EOS can now be completed */
847 delta_complete_eos(ctx, frame);
849 ctx->state = DELTA_STATE_EOS;
855 * EOS completion from driver is delayed because
856 * we don't have a free empty frame available.
857 * EOS completion is so delayed till next frame_queue() call
858 * to be sure to have a free empty frame available.
860 ctx->state = DELTA_STATE_WF_EOS;
861 dev_dbg(delta->dev, "%s EOS delayed\n", ctx->name);
866 static int delta_decoder_cmd(struct file *file, void *fh,
867 struct v4l2_decoder_cmd *cmd)
869 struct delta_ctx *ctx = to_ctx(fh);
872 ret = delta_try_decoder_cmd(file, fh, cmd);
876 return delta_decoder_stop_cmd(ctx, fh);
879 static int delta_subscribe_event(struct v4l2_fh *fh,
880 const struct v4l2_event_subscription *sub)
884 return v4l2_event_subscribe(fh, sub, 2, NULL);
893 static const struct v4l2_ioctl_ops delta_ioctl_ops = {
894 .vidioc_querycap = delta_querycap,
895 .vidioc_enum_fmt_vid_cap = delta_enum_fmt_frame,
896 .vidioc_g_fmt_vid_cap = delta_g_fmt_frame,
897 .vidioc_try_fmt_vid_cap = delta_try_fmt_frame,
898 .vidioc_s_fmt_vid_cap = delta_s_fmt_frame,
899 .vidioc_enum_fmt_vid_out = delta_enum_fmt_stream,
900 .vidioc_g_fmt_vid_out = delta_g_fmt_stream,
901 .vidioc_try_fmt_vid_out = delta_try_fmt_stream,
902 .vidioc_s_fmt_vid_out = delta_s_fmt_stream,
903 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
904 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
905 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
906 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
907 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
908 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
909 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
910 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
911 .vidioc_g_selection = delta_g_selection,
912 .vidioc_try_decoder_cmd = delta_try_decoder_cmd,
913 .vidioc_decoder_cmd = delta_decoder_cmd,
914 .vidioc_subscribe_event = delta_subscribe_event,
915 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
919 * mem-to-mem operations
922 static void delta_run_work(struct work_struct *work)
924 struct delta_ctx *ctx = container_of(work, struct delta_ctx, run_work);
925 struct delta_dev *delta = ctx->dev;
926 const struct delta_dec *dec = ctx->dec;
928 struct delta_frame *frame = NULL;
930 bool discard = false;
931 struct vb2_v4l2_buffer *vbuf;
934 dev_err(delta->dev, "%s no decoder opened yet\n", ctx->name);
938 /* protect instance against reentrancy */
939 mutex_lock(&ctx->lock);
941 vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
943 dev_err(delta->dev, "%s no buffer to decode\n", ctx->name);
944 mutex_unlock(&ctx->lock);
948 au->size = vb2_get_plane_payload(&vbuf->vb2_buf, 0);
949 au->dts = vbuf->vb2_buf.timestamp;
951 /* dump access unit */
954 /* enable the hardware */
956 ret = delta_get_sync(ctx);
958 delta_put_autosuspend(ctx);
963 /* decode this access unit */
964 ret = call_dec_op(dec, decode, ctx, au);
967 * if the (-ENODATA) value is returned, it refers to the interlaced
968 * stream case for which 2 access units are needed to get 1 frame.
969 * So, this returned value doesn't mean that the decoding fails, but
970 * indicates that the timestamp information of the access unit shall
971 * not be taken into account, and that the V4L2 buffer associated with
972 * the access unit shall be flagged with V4L2_BUF_FLAG_ERROR to inform
973 * the user of this situation
975 if (ret == -ENODATA) {
978 dev_err(delta->dev, "%s decoding failed (%d)\n",
981 /* disable the hardware */
983 delta_put_autosuspend(ctx);
988 /* disable the hardware */
990 delta_put_autosuspend(ctx);
992 /* push au timestamp in FIFO */
994 delta_push_dts(ctx, au->dts);
996 /* get available decoded frames */
998 ret = call_dec_op(dec, get_frame, ctx, &frame);
999 if (ret == -ENODATA) {
1000 /* no more decoded frames */
1004 dev_err(delta->dev, "%s cannot get decoded frame (%d)\n",
1010 "%s NULL decoded frame\n",
1016 /* pop timestamp and mark frame with it */
1017 delta_pop_dts(ctx, &frame->dts);
1019 /* release decoded frame to user */
1020 delta_frame_done(ctx, frame, 0);
1024 requeue_free_frames(ctx);
1025 delta_au_done(ctx, au, (discard ? -ENODATA : 0));
1026 mutex_unlock(&ctx->lock);
1027 v4l2_m2m_job_finish(delta->m2m_dev, ctx->fh.m2m_ctx);
1031 requeue_free_frames(ctx);
1032 delta_au_done(ctx, au, ret);
1033 mutex_unlock(&ctx->lock);
1034 v4l2_m2m_job_finish(delta->m2m_dev, ctx->fh.m2m_ctx);
1037 static void delta_device_run(void *priv)
1039 struct delta_ctx *ctx = priv;
1040 struct delta_dev *delta = ctx->dev;
1042 queue_work(delta->work_queue, &ctx->run_work);
1045 static void delta_job_abort(void *priv)
1047 struct delta_ctx *ctx = priv;
1048 struct delta_dev *delta = ctx->dev;
1050 dev_dbg(delta->dev, "%s aborting job\n", ctx->name);
1052 ctx->aborting = true;
1055 static int delta_job_ready(void *priv)
1057 struct delta_ctx *ctx = priv;
1058 struct delta_dev *delta = ctx->dev;
1059 int src_bufs = v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx);
1062 dev_dbg(delta->dev, "%s not ready: not enough video buffers.\n",
1067 if (!v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx)) {
1068 dev_dbg(delta->dev, "%s not ready: not enough video capture buffers.\n",
1073 if (ctx->aborting) {
1074 dev_dbg(delta->dev, "%s job not ready: aborting\n", ctx->name);
1078 dev_dbg(delta->dev, "%s job ready\n", ctx->name);
1083 /* mem-to-mem ops */
1084 static const struct v4l2_m2m_ops delta_m2m_ops = {
1085 .device_run = delta_device_run,
1086 .job_ready = delta_job_ready,
1087 .job_abort = delta_job_abort,
1091 * VB2 queue operations
1094 static int delta_vb2_au_queue_setup(struct vb2_queue *vq,
1095 unsigned int *num_buffers,
1096 unsigned int *num_planes,
1097 unsigned int sizes[],
1098 struct device *alloc_devs[])
1100 struct delta_ctx *ctx = vb2_get_drv_priv(vq);
1101 unsigned int size = ctx->max_au_size;
1104 return sizes[0] < size ? -EINVAL : 0;
1107 if (*num_buffers < 1)
1109 if (*num_buffers > DELTA_MAX_AUS)
1110 *num_buffers = DELTA_MAX_AUS;
1117 static int delta_vb2_au_prepare(struct vb2_buffer *vb)
1119 struct vb2_queue *q = vb->vb2_queue;
1120 struct delta_ctx *ctx = vb2_get_drv_priv(q);
1121 struct delta_dev *delta = ctx->dev;
1122 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1123 struct delta_au *au = to_au(vbuf);
1125 if (!au->prepared) {
1126 /* get memory addresses */
1127 au->vaddr = vb2_plane_vaddr(&au->vbuf.vb2_buf, 0);
1128 au->paddr = vb2_dma_contig_plane_dma_addr
1129 (&au->vbuf.vb2_buf, 0);
1130 au->prepared = true;
1131 dev_dbg(delta->dev, "%s au[%d] prepared; virt=0x%p, phy=0x%pad\n",
1132 ctx->name, vb->index, au->vaddr, &au->paddr);
1135 if (vbuf->field == V4L2_FIELD_ANY)
1136 vbuf->field = V4L2_FIELD_NONE;
1141 static int delta_setup_frame(struct delta_ctx *ctx,
1142 struct delta_frame *frame)
1144 struct delta_dev *delta = ctx->dev;
1145 const struct delta_dec *dec = ctx->dec;
1147 if (frame->index >= DELTA_MAX_FRAMES) {
1149 "%s frame index=%d exceeds output frame count (%d)\n",
1150 ctx->name, frame->index, DELTA_MAX_FRAMES);
1154 if (ctx->nb_of_frames >= DELTA_MAX_FRAMES) {
1156 "%s number of frames exceeds output frame count (%d > %d)\n",
1157 ctx->name, ctx->nb_of_frames, DELTA_MAX_FRAMES);
1161 if (frame->index != ctx->nb_of_frames) {
1162 dev_warn(delta->dev,
1163 "%s frame index discontinuity detected, expected %d, got %d\n",
1164 ctx->name, ctx->nb_of_frames, frame->index);
1167 frame->state = DELTA_FRAME_FREE;
1168 ctx->frames[ctx->nb_of_frames] = frame;
1169 ctx->nb_of_frames++;
1171 /* setup frame on decoder side */
1172 return call_dec_op(dec, setup_frame, ctx, frame);
1176 * default implementation of get_frameinfo decoder ops
1177 * matching frame information from stream information
1178 * & with default pixel format & default alignment.
1180 int delta_get_frameinfo_default(struct delta_ctx *ctx,
1181 struct delta_frameinfo *frameinfo)
1183 struct delta_streaminfo *streaminfo = &ctx->streaminfo;
1185 memset(frameinfo, 0, sizeof(*frameinfo));
1186 frameinfo->pixelformat = V4L2_PIX_FMT_NV12;
1187 frameinfo->width = streaminfo->width;
1188 frameinfo->height = streaminfo->height;
1189 frameinfo->aligned_width = ALIGN(streaminfo->width,
1190 DELTA_WIDTH_ALIGNMENT);
1191 frameinfo->aligned_height = ALIGN(streaminfo->height,
1192 DELTA_HEIGHT_ALIGNMENT);
1193 frameinfo->size = frame_size(frameinfo->aligned_width,
1194 frameinfo->aligned_height,
1195 frameinfo->pixelformat);
1196 if (streaminfo->flags & DELTA_STREAMINFO_FLAG_CROP) {
1197 frameinfo->flags |= DELTA_FRAMEINFO_FLAG_CROP;
1198 frameinfo->crop = streaminfo->crop;
1200 if (streaminfo->flags & DELTA_STREAMINFO_FLAG_PIXELASPECT) {
1201 frameinfo->flags |= DELTA_FRAMEINFO_FLAG_PIXELASPECT;
1202 frameinfo->pixelaspect = streaminfo->pixelaspect;
1204 frameinfo->field = streaminfo->field;
1210 * default implementation of recycle decoder ops
1211 * consisting to relax the "decoded" frame state
1213 int delta_recycle_default(struct delta_ctx *pctx,
1214 struct delta_frame *frame)
1216 frame->state &= ~DELTA_FRAME_DEC;
1221 static void dump_frames_status(struct delta_ctx *ctx)
1223 struct delta_dev *delta = ctx->dev;
1225 struct delta_frame *frame;
1226 unsigned char str[100] = "";
1228 dev_info(delta->dev,
1229 "%s dumping frames status...\n", ctx->name);
1231 for (i = 0; i < ctx->nb_of_frames; i++) {
1232 frame = ctx->frames[i];
1233 dev_info(delta->dev,
1234 "%s frame[%d] %s\n",
1235 ctx->name, frame->index,
1236 frame_state_str(frame->state,
1241 int delta_get_free_frame(struct delta_ctx *ctx,
1242 struct delta_frame **pframe)
1244 struct delta_dev *delta = ctx->dev;
1245 struct vb2_v4l2_buffer *vbuf;
1246 struct delta_frame *frame;
1250 vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
1252 dev_err(delta->dev, "%s no frame available",
1257 frame = to_frame(vbuf);
1258 frame->state &= ~DELTA_FRAME_M2M;
1259 if (frame->state != DELTA_FRAME_FREE) {
1261 "%s frame[%d] is not free\n",
1262 ctx->name, frame->index);
1263 dump_frames_status(ctx);
1268 "%s get free frame[%d]\n", ctx->name, frame->index);
1274 int delta_get_sync(struct delta_ctx *ctx)
1276 struct delta_dev *delta = ctx->dev;
1279 /* enable the hardware */
1280 ret = pm_runtime_get_sync(delta->dev);
1282 dev_err(delta->dev, "%s pm_runtime_get_sync failed (%d)\n",
1290 void delta_put_autosuspend(struct delta_ctx *ctx)
1292 struct delta_dev *delta = ctx->dev;
1294 pm_runtime_put_autosuspend(delta->dev);
1297 static void delta_vb2_au_queue(struct vb2_buffer *vb)
1299 struct vb2_queue *q = vb->vb2_queue;
1300 struct delta_ctx *ctx = vb2_get_drv_priv(q);
1301 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1303 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1306 static int delta_vb2_au_start_streaming(struct vb2_queue *q,
1309 struct delta_ctx *ctx = vb2_get_drv_priv(q);
1310 struct delta_dev *delta = ctx->dev;
1311 const struct delta_dec *dec = ctx->dec;
1312 struct delta_au *au;
1314 struct vb2_v4l2_buffer *vbuf = NULL;
1315 struct delta_streaminfo *streaminfo = &ctx->streaminfo;
1316 struct delta_frameinfo *frameinfo = &ctx->frameinfo;
1317 unsigned char str1[100] = "";
1318 unsigned char str2[100] = "";
1320 if ((ctx->state != DELTA_STATE_WF_FORMAT) &&
1321 (ctx->state != DELTA_STATE_WF_STREAMINFO))
1324 if (ctx->state == DELTA_STATE_WF_FORMAT) {
1325 /* open decoder if not yet done */
1326 ret = delta_open_decoder(ctx,
1327 ctx->streaminfo.streamformat,
1328 ctx->frameinfo.pixelformat, &dec);
1332 ctx->state = DELTA_STATE_WF_STREAMINFO;
1336 * first buffer should contain stream header,
1337 * decode it to get the infos related to stream
1338 * such as width, height, dpb, ...
1340 vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
1342 dev_err(delta->dev, "%s failed to start streaming, no stream header buffer enqueued\n",
1348 au->size = vb2_get_plane_payload(&vbuf->vb2_buf, 0);
1349 au->dts = vbuf->vb2_buf.timestamp;
1351 delta_push_dts(ctx, au->dts);
1353 /* dump access unit */
1356 /* decode this access unit */
1357 ret = call_dec_op(dec, decode, ctx, au);
1359 dev_err(delta->dev, "%s failed to start streaming, header decoding failed (%d)\n",
1364 ret = call_dec_op(dec, get_streaminfo, ctx, streaminfo);
1366 dev_dbg_ratelimited(delta->dev,
1367 "%s failed to start streaming, valid stream header not yet decoded\n",
1371 ctx->flags |= DELTA_FLAG_STREAMINFO;
1373 ret = call_dec_op(dec, get_frameinfo, ctx, frameinfo);
1376 ctx->flags |= DELTA_FLAG_FRAMEINFO;
1378 ctx->state = DELTA_STATE_READY;
1380 dev_dbg(delta->dev, "%s %s => %s\n", ctx->name,
1381 delta_streaminfo_str(streaminfo, str1, sizeof(str1)),
1382 delta_frameinfo_str(frameinfo, str2, sizeof(str2)));
1384 delta_au_done(ctx, au, ret);
1389 * return all buffers to vb2 in QUEUED state.
1390 * This will give ownership back to userspace
1393 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_QUEUED);
1395 while ((vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
1396 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_QUEUED);
1400 static void delta_vb2_au_stop_streaming(struct vb2_queue *q)
1402 struct delta_ctx *ctx = vb2_get_drv_priv(q);
1403 struct vb2_v4l2_buffer *vbuf;
1405 delta_flush_dts(ctx);
1407 /* return all buffers to vb2 in ERROR state */
1408 while ((vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
1409 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
1413 ctx->aborting = false;
1416 static int delta_vb2_frame_queue_setup(struct vb2_queue *vq,
1417 unsigned int *num_buffers,
1418 unsigned int *num_planes,
1419 unsigned int sizes[],
1420 struct device *alloc_devs[])
1422 struct delta_ctx *ctx = vb2_get_drv_priv(vq);
1423 struct delta_dev *delta = ctx->dev;
1424 struct delta_streaminfo *streaminfo = &ctx->streaminfo;
1425 struct delta_frameinfo *frameinfo = &ctx->frameinfo;
1426 unsigned int size = frameinfo->size;
1429 * the number of output buffers needed for decoding =
1430 * user need (*num_buffers given, usually for display pipeline) +
1431 * stream need (streaminfo->dpb) +
1432 * decoding peak smoothing (depends on DELTA IP perf)
1434 if (*num_buffers < DELTA_MIN_FRAME_USER) {
1436 "%s num_buffers too low (%d), increasing to %d\n",
1437 ctx->name, *num_buffers, DELTA_MIN_FRAME_USER);
1438 *num_buffers = DELTA_MIN_FRAME_USER;
1441 *num_buffers += streaminfo->dpb + DELTA_PEAK_FRAME_SMOOTHING;
1443 if (*num_buffers > DELTA_MAX_FRAMES) {
1445 "%s output frame count too high (%d), cut to %d\n",
1446 ctx->name, *num_buffers, DELTA_MAX_FRAMES);
1447 *num_buffers = DELTA_MAX_FRAMES;
1451 return sizes[0] < size ? -EINVAL : 0;
1453 /* single plane for Y and CbCr */
1458 ctx->nb_of_frames = 0;
1463 static int delta_vb2_frame_prepare(struct vb2_buffer *vb)
1465 struct vb2_queue *q = vb->vb2_queue;
1466 struct delta_ctx *ctx = vb2_get_drv_priv(q);
1467 struct delta_dev *delta = ctx->dev;
1468 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1469 struct delta_frame *frame = to_frame(vbuf);
1472 if (!frame->prepared) {
1473 frame->index = vbuf->vb2_buf.index;
1474 frame->vaddr = vb2_plane_vaddr(&vbuf->vb2_buf, 0);
1475 frame->paddr = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
1476 frame->info = ctx->frameinfo;
1478 ret = delta_setup_frame(ctx, frame);
1481 "%s setup_frame() failed (%d)\n",
1485 frame->prepared = true;
1487 "%s frame[%d] prepared; virt=0x%p, phy=0x%pad\n",
1488 ctx->name, vb->index, frame->vaddr,
1492 frame->flags = vbuf->flags;
1497 static void delta_vb2_frame_finish(struct vb2_buffer *vb)
1499 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1500 struct delta_frame *frame = to_frame(vbuf);
1502 /* update V4L2 fields for user */
1503 vb2_set_plane_payload(&vbuf->vb2_buf, 0, frame->info.size);
1504 vb->timestamp = frame->dts;
1505 vbuf->field = frame->field;
1506 vbuf->flags = frame->flags;
1509 static void delta_vb2_frame_queue(struct vb2_buffer *vb)
1511 struct vb2_queue *q = vb->vb2_queue;
1512 struct delta_ctx *ctx = vb2_get_drv_priv(q);
1513 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1514 struct delta_frame *frame = to_frame(vbuf);
1516 if (ctx->state == DELTA_STATE_WF_EOS) {
1517 /* new frame available, EOS can now be completed */
1518 delta_complete_eos(ctx, frame);
1520 ctx->state = DELTA_STATE_EOS;
1522 /* return, no need to recycle this buffer to decoder */
1526 /* recycle this frame */
1527 delta_recycle(ctx, frame);
1530 static void delta_vb2_frame_stop_streaming(struct vb2_queue *q)
1532 struct delta_ctx *ctx = vb2_get_drv_priv(q);
1533 struct vb2_v4l2_buffer *vbuf;
1534 struct delta_frame *frame;
1535 const struct delta_dec *dec = ctx->dec;
1538 delta_flush_dts(ctx);
1540 call_dec_op(dec, flush, ctx);
1543 * return all buffers to vb2 in ERROR state
1544 * & reset each frame state to OUT
1546 for (i = 0; i < ctx->nb_of_frames; i++) {
1547 frame = ctx->frames[i];
1548 if (!(frame->state & DELTA_FRAME_OUT)) {
1549 vbuf = &frame->vbuf;
1550 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
1552 frame->state = DELTA_FRAME_OUT;
1557 ctx->aborting = false;
1561 static const struct vb2_ops delta_vb2_au_ops = {
1562 .queue_setup = delta_vb2_au_queue_setup,
1563 .buf_prepare = delta_vb2_au_prepare,
1564 .buf_queue = delta_vb2_au_queue,
1565 .wait_prepare = vb2_ops_wait_prepare,
1566 .wait_finish = vb2_ops_wait_finish,
1567 .start_streaming = delta_vb2_au_start_streaming,
1568 .stop_streaming = delta_vb2_au_stop_streaming,
1571 static const struct vb2_ops delta_vb2_frame_ops = {
1572 .queue_setup = delta_vb2_frame_queue_setup,
1573 .buf_prepare = delta_vb2_frame_prepare,
1574 .buf_finish = delta_vb2_frame_finish,
1575 .buf_queue = delta_vb2_frame_queue,
1576 .wait_prepare = vb2_ops_wait_prepare,
1577 .wait_finish = vb2_ops_wait_finish,
1578 .stop_streaming = delta_vb2_frame_stop_streaming,
1582 * V4L2 file operations
1585 static int queue_init(void *priv,
1586 struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
1588 struct vb2_queue *q;
1589 struct delta_ctx *ctx = priv;
1590 struct delta_dev *delta = ctx->dev;
1593 /* setup vb2 queue for stream input */
1595 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1596 q->io_modes = VB2_MMAP | VB2_DMABUF;
1598 /* overload vb2 buf with private au struct */
1599 q->buf_struct_size = sizeof(struct delta_au);
1600 q->ops = &delta_vb2_au_ops;
1601 q->mem_ops = &vb2_dma_contig_memops;
1602 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1603 q->lock = &delta->lock;
1604 q->dev = delta->dev;
1606 ret = vb2_queue_init(q);
1610 /* setup vb2 queue for frame output */
1612 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1613 q->io_modes = VB2_MMAP | VB2_DMABUF;
1615 /* overload vb2 buf with private frame struct */
1616 q->buf_struct_size = sizeof(struct delta_frame)
1617 + DELTA_MAX_FRAME_PRIV_SIZE;
1618 q->ops = &delta_vb2_frame_ops;
1619 q->mem_ops = &vb2_dma_contig_memops;
1620 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1621 q->lock = &delta->lock;
1622 q->dev = delta->dev;
1624 return vb2_queue_init(q);
1627 static int delta_open(struct file *file)
1629 struct delta_dev *delta = video_drvdata(file);
1630 struct delta_ctx *ctx = NULL;
1633 mutex_lock(&delta->lock);
1635 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1642 v4l2_fh_init(&ctx->fh, video_devdata(file));
1643 file->private_data = &ctx->fh;
1644 v4l2_fh_add(&ctx->fh);
1646 INIT_WORK(&ctx->run_work, delta_run_work);
1647 mutex_init(&ctx->lock);
1649 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(delta->m2m_dev, ctx,
1651 if (IS_ERR(ctx->fh.m2m_ctx)) {
1652 ret = PTR_ERR(ctx->fh.m2m_ctx);
1653 dev_err(delta->dev, "%s failed to initialize m2m context (%d)\n",
1659 * wait stream format to determine which
1662 ctx->state = DELTA_STATE_WF_FORMAT;
1664 INIT_LIST_HEAD(&ctx->dts);
1666 /* set the instance name */
1667 delta->instance_id++;
1668 snprintf(ctx->name, sizeof(ctx->name), "[%3d:----]",
1669 delta->instance_id);
1671 /* default parameters for frame and stream */
1672 set_default_params(ctx);
1674 /* enable ST231 clocks */
1675 if (delta->clk_st231)
1676 if (clk_prepare_enable(delta->clk_st231))
1677 dev_warn(delta->dev, "failed to enable st231 clk\n");
1679 /* enable FLASH_PROMIP clock */
1680 if (delta->clk_flash_promip)
1681 if (clk_prepare_enable(delta->clk_flash_promip))
1682 dev_warn(delta->dev, "failed to enable delta promip clk\n");
1684 mutex_unlock(&delta->lock);
1686 dev_dbg(delta->dev, "%s decoder instance created\n", ctx->name);
1691 v4l2_fh_del(&ctx->fh);
1692 v4l2_fh_exit(&ctx->fh);
1695 mutex_unlock(&delta->lock);
1700 static int delta_release(struct file *file)
1702 struct delta_ctx *ctx = to_ctx(file->private_data);
1703 struct delta_dev *delta = ctx->dev;
1704 const struct delta_dec *dec = ctx->dec;
1706 mutex_lock(&delta->lock);
1709 call_dec_op(dec, close, ctx);
1712 * trace a summary of instance
1713 * before closing (debug purpose)
1715 delta_trace_summary(ctx);
1717 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
1719 v4l2_fh_del(&ctx->fh);
1720 v4l2_fh_exit(&ctx->fh);
1722 /* disable ST231 clocks */
1723 if (delta->clk_st231)
1724 clk_disable_unprepare(delta->clk_st231);
1726 /* disable FLASH_PROMIP clock */
1727 if (delta->clk_flash_promip)
1728 clk_disable_unprepare(delta->clk_flash_promip);
1730 dev_dbg(delta->dev, "%s decoder instance released\n", ctx->name);
1734 mutex_unlock(&delta->lock);
1739 static const struct v4l2_file_operations delta_fops = {
1740 .owner = THIS_MODULE,
1742 .release = delta_release,
1743 .unlocked_ioctl = video_ioctl2,
1744 .mmap = v4l2_m2m_fop_mmap,
1745 .poll = v4l2_m2m_fop_poll,
1749 * Platform device operations
1752 static int delta_register_device(struct delta_dev *delta)
1755 struct video_device *vdev;
1760 delta->m2m_dev = v4l2_m2m_init(&delta_m2m_ops);
1761 if (IS_ERR(delta->m2m_dev)) {
1762 dev_err(delta->dev, "%s failed to initialize v4l2-m2m device\n",
1764 ret = PTR_ERR(delta->m2m_dev);
1768 vdev = video_device_alloc();
1770 dev_err(delta->dev, "%s failed to allocate video device\n",
1773 goto err_m2m_release;
1776 vdev->fops = &delta_fops;
1777 vdev->ioctl_ops = &delta_ioctl_ops;
1778 vdev->release = video_device_release;
1779 vdev->lock = &delta->lock;
1780 vdev->vfl_dir = VFL_DIR_M2M;
1781 vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
1782 vdev->v4l2_dev = &delta->v4l2_dev;
1783 snprintf(vdev->name, sizeof(vdev->name), "%s-%s",
1784 DELTA_NAME, DELTA_FW_VERSION);
1786 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1788 dev_err(delta->dev, "%s failed to register video device\n",
1790 goto err_vdev_release;
1794 video_set_drvdata(vdev, delta);
1798 video_device_release(vdev);
1800 v4l2_m2m_release(delta->m2m_dev);
1805 static void delta_unregister_device(struct delta_dev *delta)
1811 v4l2_m2m_release(delta->m2m_dev);
1813 video_unregister_device(delta->vdev);
1816 static int delta_probe(struct platform_device *pdev)
1818 struct delta_dev *delta;
1819 struct device *dev = &pdev->dev;
1822 delta = devm_kzalloc(dev, sizeof(*delta), GFP_KERNEL);
1830 platform_set_drvdata(pdev, delta);
1832 mutex_init(&delta->lock);
1834 /* get clock resources */
1835 delta->clk_delta = devm_clk_get(dev, "delta");
1836 if (IS_ERR(delta->clk_delta)) {
1837 dev_dbg(dev, "%s can't get delta clock\n", DELTA_PREFIX);
1838 delta->clk_delta = NULL;
1841 delta->clk_st231 = devm_clk_get(dev, "delta-st231");
1842 if (IS_ERR(delta->clk_st231)) {
1843 dev_dbg(dev, "%s can't get delta-st231 clock\n", DELTA_PREFIX);
1844 delta->clk_st231 = NULL;
1847 delta->clk_flash_promip = devm_clk_get(dev, "delta-flash-promip");
1848 if (IS_ERR(delta->clk_flash_promip)) {
1849 dev_dbg(dev, "%s can't get delta-flash-promip clock\n",
1851 delta->clk_flash_promip = NULL;
1854 /* init pm_runtime used for power management */
1855 pm_runtime_set_autosuspend_delay(dev, DELTA_HW_AUTOSUSPEND_DELAY_MS);
1856 pm_runtime_use_autosuspend(dev);
1857 pm_runtime_set_suspended(dev);
1858 pm_runtime_enable(dev);
1860 /* init firmware ipc channel */
1861 ret = delta_ipc_init(delta);
1863 dev_err(delta->dev, "%s failed to initialize firmware ipc channel\n",
1868 /* register all available decoders */
1869 register_decoders(delta);
1871 /* register all supported formats */
1872 register_formats(delta);
1874 /* register on V4L2 */
1875 ret = v4l2_device_register(dev, &delta->v4l2_dev);
1877 dev_err(delta->dev, "%s failed to register V4L2 device\n",
1882 delta->work_queue = create_workqueue(DELTA_NAME);
1883 if (!delta->work_queue) {
1884 dev_err(delta->dev, "%s failed to allocate work queue\n",
1890 /* register device */
1891 ret = delta_register_device(delta);
1893 goto err_work_queue;
1895 dev_info(dev, "%s %s registered as /dev/video%d\n",
1896 DELTA_PREFIX, delta->vdev->name, delta->vdev->num);
1901 destroy_workqueue(delta->work_queue);
1903 v4l2_device_unregister(&delta->v4l2_dev);
1908 static int delta_remove(struct platform_device *pdev)
1910 struct delta_dev *delta = platform_get_drvdata(pdev);
1912 delta_ipc_exit(delta);
1914 delta_unregister_device(delta);
1916 destroy_workqueue(delta->work_queue);
1918 pm_runtime_put_autosuspend(delta->dev);
1919 pm_runtime_disable(delta->dev);
1921 v4l2_device_unregister(&delta->v4l2_dev);
1926 static int delta_runtime_suspend(struct device *dev)
1928 struct delta_dev *delta = dev_get_drvdata(dev);
1930 if (delta->clk_delta)
1931 clk_disable_unprepare(delta->clk_delta);
1936 static int delta_runtime_resume(struct device *dev)
1938 struct delta_dev *delta = dev_get_drvdata(dev);
1940 if (delta->clk_delta)
1941 if (clk_prepare_enable(delta->clk_delta))
1942 dev_warn(dev, "failed to prepare/enable delta clk\n");
1948 static const struct dev_pm_ops delta_pm_ops = {
1949 .runtime_suspend = delta_runtime_suspend,
1950 .runtime_resume = delta_runtime_resume,
1953 static const struct of_device_id delta_match_types[] = {
1955 .compatible = "st,st-delta",
1962 MODULE_DEVICE_TABLE(of, delta_match_types);
1964 static struct platform_driver delta_driver = {
1965 .probe = delta_probe,
1966 .remove = delta_remove,
1969 .of_match_table = delta_match_types,
1970 .pm = &delta_pm_ops},
1973 module_platform_driver(delta_driver);
1975 MODULE_LICENSE("GPL");
1976 MODULE_AUTHOR("Hugues Fruchet <hugues.fruchet@st.com>");
1977 MODULE_DESCRIPTION("STMicroelectronics DELTA video decoder V4L2 driver");