ubuntu-linux-kernel/drivers/media/platform/sti/delta/delta-v4l2.c

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2024-04-01 15:06:58 +00:00
/*
* Copyright (C) STMicroelectronics SA 2015
* Authors: Hugues Fruchet <hugues.fruchet@st.com>
* Jean-Christophe Trotin <jean-christophe.trotin@st.com>
* for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-event.h>
#include <media/videobuf2-dma-contig.h>
#include "delta.h"
#include "delta-debug.h"
#include "delta-ipc.h"
#define DELTA_NAME "st-delta"
#define DELTA_PREFIX "[---:----]"
#define to_ctx(__fh) container_of(__fh, struct delta_ctx, fh)
#define to_au(__vbuf) container_of(__vbuf, struct delta_au, vbuf)
#define to_frame(__vbuf) container_of(__vbuf, struct delta_frame, vbuf)
#define call_dec_op(dec, op, args...)\
((dec && (dec)->op) ? (dec)->op(args) : 0)
/* registry of available decoders */
static const struct delta_dec *delta_decoders[] = {
#ifdef CONFIG_VIDEO_STI_DELTA_MJPEG
&mjpegdec,
#endif
};
static inline int frame_size(u32 w, u32 h, u32 fmt)
{
switch (fmt) {
case V4L2_PIX_FMT_NV12:
return (w * h * 3) / 2;
default:
return 0;
}
}
static inline int frame_stride(u32 w, u32 fmt)
{
switch (fmt) {
case V4L2_PIX_FMT_NV12:
return w;
default:
return 0;
}
}
static void dump_au(struct delta_ctx *ctx, struct delta_au *au)
{
struct delta_dev *delta = ctx->dev;
u32 size = 10; /* dump first & last 10 bytes */
u8 *data = (u8 *)(au->vaddr);
if (au->size <= (size * 2))
dev_dbg(delta->dev, "%s dump au[%d] dts=%lld size=%d data=%*ph\n",
ctx->name, au->vbuf.vb2_buf.index, au->dts, au->size,
au->size, data);
else
dev_dbg(delta->dev, "%s dump au[%d] dts=%lld size=%d data=%*ph..%*ph\n",
ctx->name, au->vbuf.vb2_buf.index, au->dts, au->size,
size, data, size, data + au->size - size);
}
static void dump_frame(struct delta_ctx *ctx, struct delta_frame *frame)
{
struct delta_dev *delta = ctx->dev;
u32 size = 10; /* dump first 10 bytes */
u8 *data = (u8 *)(frame->vaddr);
dev_dbg(delta->dev, "%s dump frame[%d] dts=%lld type=%s field=%s data=%*ph\n",
ctx->name, frame->index, frame->dts,
frame_type_str(frame->flags),
frame_field_str(frame->field),
size, data);
}
static void delta_au_done(struct delta_ctx *ctx, struct delta_au *au, int err)
{
struct vb2_v4l2_buffer *vbuf;
vbuf = &au->vbuf;
vbuf->sequence = ctx->au_num++;
v4l2_m2m_buf_done(vbuf, err ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
}
static void delta_frame_done(struct delta_ctx *ctx, struct delta_frame *frame,
int err)
{
struct vb2_v4l2_buffer *vbuf;
dump_frame(ctx, frame);
/* decoded frame is now output to user */
frame->state |= DELTA_FRAME_OUT;
vbuf = &frame->vbuf;
vbuf->sequence = ctx->frame_num++;
v4l2_m2m_buf_done(vbuf, err ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
if (frame->info.size) /* ignore EOS */
ctx->output_frames++;
}
static void requeue_free_frames(struct delta_ctx *ctx)
{
struct vb2_v4l2_buffer *vbuf;
struct delta_frame *frame;
unsigned int i;
/* requeue all free frames */
for (i = 0; i < ctx->nb_of_frames; i++) {
frame = ctx->frames[i];
if (frame->state == DELTA_FRAME_FREE) {
vbuf = &frame->vbuf;
v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
frame->state = DELTA_FRAME_M2M;
}
}
}
static int delta_recycle(struct delta_ctx *ctx, struct delta_frame *frame)
{
const struct delta_dec *dec = ctx->dec;
/* recycle frame on decoder side */
call_dec_op(dec, recycle, ctx, frame);
/* this frame is no more output */
frame->state &= ~DELTA_FRAME_OUT;
/* requeue free frame */
if (frame->state == DELTA_FRAME_FREE) {
struct vb2_v4l2_buffer *vbuf = &frame->vbuf;
v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
frame->state = DELTA_FRAME_M2M;
}
/* reset other frame fields */
frame->flags = 0;
frame->dts = 0;
return 0;
}
static void delta_push_dts(struct delta_ctx *ctx, u64 val)
{
struct delta_dts *dts;
dts = kzalloc(sizeof(*dts), GFP_KERNEL);
if (!dts)
return;
INIT_LIST_HEAD(&dts->list);
/*
* protected by global lock acquired
* by V4L2 when calling delta_vb2_au_queue
*/
dts->val = val;
list_add_tail(&dts->list, &ctx->dts);
}
static void delta_pop_dts(struct delta_ctx *ctx, u64 *val)
{
struct delta_dev *delta = ctx->dev;
struct delta_dts *dts;
/*
* protected by global lock acquired
* by V4L2 when calling delta_vb2_au_queue
*/
if (list_empty(&ctx->dts)) {
dev_warn(delta->dev, "%s no dts to pop ... output dts = 0\n",
ctx->name);
*val = 0;
return;
}
dts = list_first_entry(&ctx->dts, struct delta_dts, list);
list_del(&dts->list);
*val = dts->val;
kfree(dts);
}
static void delta_flush_dts(struct delta_ctx *ctx)
{
struct delta_dts *dts;
struct delta_dts *next;
/*
* protected by global lock acquired
* by V4L2 when calling delta_vb2_au_queue
*/
/* free all pending dts */
list_for_each_entry_safe(dts, next, &ctx->dts, list)
kfree(dts);
/* reset list */
INIT_LIST_HEAD(&ctx->dts);
}
static inline int frame_alignment(u32 fmt)
{
switch (fmt) {
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
/* multiple of 2 */
return 2;
default:
return 1;
}
}
static inline int estimated_au_size(u32 w, u32 h)
{
/*
* for a MJPEG stream encoded from YUV422 pixel format,
* assuming a compression ratio of 2, the maximum size
* of an access unit is (width x height x 2) / 2,
* so (width x height)
*/
return (w * h);
}
static void set_default_params(struct delta_ctx *ctx)
{
struct delta_frameinfo *frameinfo = &ctx->frameinfo;
struct delta_streaminfo *streaminfo = &ctx->streaminfo;
memset(frameinfo, 0, sizeof(*frameinfo));
frameinfo->pixelformat = V4L2_PIX_FMT_NV12;
frameinfo->width = DELTA_DEFAULT_WIDTH;
frameinfo->height = DELTA_DEFAULT_HEIGHT;
frameinfo->aligned_width = ALIGN(frameinfo->width,
DELTA_WIDTH_ALIGNMENT);
frameinfo->aligned_height = ALIGN(frameinfo->height,
DELTA_HEIGHT_ALIGNMENT);
frameinfo->size = frame_size(frameinfo->aligned_width,
frameinfo->aligned_height,
frameinfo->pixelformat);
frameinfo->field = V4L2_FIELD_NONE;
frameinfo->colorspace = V4L2_COLORSPACE_REC709;
frameinfo->xfer_func = V4L2_XFER_FUNC_DEFAULT;
frameinfo->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
frameinfo->quantization = V4L2_QUANTIZATION_DEFAULT;
memset(streaminfo, 0, sizeof(*streaminfo));
streaminfo->streamformat = DELTA_DEFAULT_STREAMFORMAT;
streaminfo->width = DELTA_DEFAULT_WIDTH;
streaminfo->height = DELTA_DEFAULT_HEIGHT;
streaminfo->field = V4L2_FIELD_NONE;
streaminfo->colorspace = V4L2_COLORSPACE_REC709;
streaminfo->xfer_func = V4L2_XFER_FUNC_DEFAULT;
streaminfo->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
streaminfo->quantization = V4L2_QUANTIZATION_DEFAULT;
ctx->max_au_size = estimated_au_size(streaminfo->width,
streaminfo->height);
}
static const struct delta_dec *delta_find_decoder(struct delta_ctx *ctx,
u32 streamformat,
u32 pixelformat)
{
struct delta_dev *delta = ctx->dev;
const struct delta_dec *dec;
unsigned int i;
for (i = 0; i < delta->nb_of_decoders; i++) {
dec = delta->decoders[i];
if ((dec->pixelformat == pixelformat) &&
(dec->streamformat == streamformat))
return dec;
}
return NULL;
}
static void register_format(u32 format, u32 formats[], u32 *nb_of_formats)
{
u32 i;
for (i = 0; i < *nb_of_formats; i++) {
if (format == formats[i])
return;
}
formats[(*nb_of_formats)++] = format;
}
static void register_formats(struct delta_dev *delta)
{
unsigned int i;
for (i = 0; i < delta->nb_of_decoders; i++) {
register_format(delta->decoders[i]->pixelformat,
delta->pixelformats,
&delta->nb_of_pixelformats);
register_format(delta->decoders[i]->streamformat,
delta->streamformats,
&delta->nb_of_streamformats);
}
}
static void register_decoders(struct delta_dev *delta)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(delta_decoders); i++) {
if (delta->nb_of_decoders >= DELTA_MAX_DECODERS) {
dev_dbg(delta->dev,
"%s failed to register %s decoder (%d maximum reached)\n",
DELTA_PREFIX, delta_decoders[i]->name,
DELTA_MAX_DECODERS);
return;
}
delta->decoders[delta->nb_of_decoders++] = delta_decoders[i];
dev_info(delta->dev, "%s %s decoder registered\n",
DELTA_PREFIX, delta_decoders[i]->name);
}
}
static void delta_lock(void *priv)
{
struct delta_ctx *ctx = priv;
struct delta_dev *delta = ctx->dev;
mutex_lock(&delta->lock);
}
static void delta_unlock(void *priv)
{
struct delta_ctx *ctx = priv;
struct delta_dev *delta = ctx->dev;
mutex_unlock(&delta->lock);
}
static int delta_open_decoder(struct delta_ctx *ctx, u32 streamformat,
u32 pixelformat, const struct delta_dec **pdec)
{
struct delta_dev *delta = ctx->dev;
const struct delta_dec *dec;
int ret;
dec = delta_find_decoder(ctx, streamformat, ctx->frameinfo.pixelformat);
if (!dec) {
dev_err(delta->dev, "%s no decoder found matching %4.4s => %4.4s\n",
ctx->name, (char *)&streamformat, (char *)&pixelformat);
return -EINVAL;
}
dev_dbg(delta->dev, "%s one decoder matching %4.4s => %4.4s\n",
ctx->name, (char *)&streamformat, (char *)&pixelformat);
/* update instance name */
snprintf(ctx->name, sizeof(ctx->name), "[%3d:%4.4s]",
delta->instance_id, (char *)&streamformat);
/* open decoder instance */
ret = call_dec_op(dec, open, ctx);
if (ret) {
dev_err(delta->dev, "%s failed to open decoder instance (%d)\n",
ctx->name, ret);
return ret;
}
dev_dbg(delta->dev, "%s %s decoder opened\n", ctx->name, dec->name);
*pdec = dec;
return ret;
}
/*
* V4L2 ioctl operations
*/
static int delta_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct delta_ctx *ctx = to_ctx(file->private_data);
struct delta_dev *delta = ctx->dev;
strlcpy(cap->driver, DELTA_NAME, sizeof(cap->driver));
strlcpy(cap->card, delta->vdev->name, sizeof(cap->card));
snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
delta->pdev->name);
return 0;
}
static int delta_enum_fmt_stream(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct delta_ctx *ctx = to_ctx(file->private_data);
struct delta_dev *delta = ctx->dev;
if (unlikely(f->index >= delta->nb_of_streamformats))
return -EINVAL;
f->pixelformat = delta->streamformats[f->index];
return 0;
}
static int delta_enum_fmt_frame(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct delta_ctx *ctx = to_ctx(file->private_data);
struct delta_dev *delta = ctx->dev;
if (unlikely(f->index >= delta->nb_of_pixelformats))
return -EINVAL;
f->pixelformat = delta->pixelformats[f->index];
return 0;
}
static int delta_g_fmt_stream(struct file *file, void *fh,
struct v4l2_format *f)
{
struct delta_ctx *ctx = to_ctx(file->private_data);
struct delta_dev *delta = ctx->dev;
struct v4l2_pix_format *pix = &f->fmt.pix;
struct delta_streaminfo *streaminfo = &ctx->streaminfo;
unsigned char str[100] = "";
if (!(ctx->flags & DELTA_FLAG_STREAMINFO))
dev_dbg(delta->dev,
"%s V4L2 GET_FMT (OUTPUT): no stream information available, default to %s\n",
ctx->name,
delta_streaminfo_str(streaminfo, str, sizeof(str)));
pix->pixelformat = streaminfo->streamformat;
pix->width = streaminfo->width;
pix->height = streaminfo->height;
pix->field = streaminfo->field;
pix->bytesperline = 0;
pix->sizeimage = ctx->max_au_size;
pix->colorspace = streaminfo->colorspace;
pix->xfer_func = streaminfo->xfer_func;
pix->ycbcr_enc = streaminfo->ycbcr_enc;
pix->quantization = streaminfo->quantization;
return 0;
}
static int delta_g_fmt_frame(struct file *file, void *fh, struct v4l2_format *f)
{
struct delta_ctx *ctx = to_ctx(file->private_data);
struct delta_dev *delta = ctx->dev;
struct v4l2_pix_format *pix = &f->fmt.pix;
struct delta_frameinfo *frameinfo = &ctx->frameinfo;
struct delta_streaminfo *streaminfo = &ctx->streaminfo;
unsigned char str[100] = "";
if (!(ctx->flags & DELTA_FLAG_FRAMEINFO))
dev_dbg(delta->dev,
"%s V4L2 GET_FMT (CAPTURE): no frame information available, default to %s\n",
ctx->name,
delta_frameinfo_str(frameinfo, str, sizeof(str)));
pix->pixelformat = frameinfo->pixelformat;
pix->width = frameinfo->aligned_width;
pix->height = frameinfo->aligned_height;
pix->field = frameinfo->field;
pix->bytesperline = frame_stride(frameinfo->aligned_width,
frameinfo->pixelformat);
pix->sizeimage = frameinfo->size;
if (ctx->flags & DELTA_FLAG_STREAMINFO) {
/* align colorspace & friends on stream ones if any set */
frameinfo->colorspace = streaminfo->colorspace;
frameinfo->xfer_func = streaminfo->xfer_func;
frameinfo->ycbcr_enc = streaminfo->ycbcr_enc;
frameinfo->quantization = streaminfo->quantization;
}
pix->colorspace = frameinfo->colorspace;
pix->xfer_func = frameinfo->xfer_func;
pix->ycbcr_enc = frameinfo->ycbcr_enc;
pix->quantization = frameinfo->quantization;
return 0;
}
static int delta_try_fmt_stream(struct file *file, void *priv,
struct v4l2_format *f)
{
struct delta_ctx *ctx = to_ctx(file->private_data);
struct delta_dev *delta = ctx->dev;
struct v4l2_pix_format *pix = &f->fmt.pix;
u32 streamformat = pix->pixelformat;
const struct delta_dec *dec;
u32 width, height;
u32 au_size;
dec = delta_find_decoder(ctx, streamformat, ctx->frameinfo.pixelformat);
if (!dec) {
dev_dbg(delta->dev,
"%s V4L2 TRY_FMT (OUTPUT): unsupported format %4.4s\n",
ctx->name, (char *)&pix->pixelformat);
return -EINVAL;
}
/* adjust width & height */
width = pix->width;
height = pix->height;
v4l_bound_align_image
(&pix->width,
DELTA_MIN_WIDTH,
dec->max_width ? dec->max_width : DELTA_MAX_WIDTH,
0,
&pix->height,
DELTA_MIN_HEIGHT,
dec->max_height ? dec->max_height : DELTA_MAX_HEIGHT,
0, 0);
if ((pix->width != width) || (pix->height != height))
dev_dbg(delta->dev,
"%s V4L2 TRY_FMT (OUTPUT): resolution updated %dx%d -> %dx%d to fit min/max/alignment\n",
ctx->name, width, height,
pix->width, pix->height);
au_size = estimated_au_size(pix->width, pix->height);
if (pix->sizeimage < au_size) {
dev_dbg(delta->dev,
"%s V4L2 TRY_FMT (OUTPUT): size updated %d -> %d to fit estimated size\n",
ctx->name, pix->sizeimage, au_size);
pix->sizeimage = au_size;
}
pix->bytesperline = 0;
if (pix->field == V4L2_FIELD_ANY)
pix->field = V4L2_FIELD_NONE;
return 0;
}
static int delta_try_fmt_frame(struct file *file, void *priv,
struct v4l2_format *f)
{
struct delta_ctx *ctx = to_ctx(file->private_data);
struct delta_dev *delta = ctx->dev;
struct v4l2_pix_format *pix = &f->fmt.pix;
u32 pixelformat = pix->pixelformat;
const struct delta_dec *dec;
u32 width, height;
dec = delta_find_decoder(ctx, ctx->streaminfo.streamformat,
pixelformat);
if (!dec) {
dev_dbg(delta->dev,
"%s V4L2 TRY_FMT (CAPTURE): unsupported format %4.4s\n",
ctx->name, (char *)&pixelformat);
return -EINVAL;
}
/* adjust width & height */
width = pix->width;
height = pix->height;
v4l_bound_align_image(&pix->width,
DELTA_MIN_WIDTH, DELTA_MAX_WIDTH,
frame_alignment(pixelformat) - 1,
&pix->height,
DELTA_MIN_HEIGHT, DELTA_MAX_HEIGHT,
frame_alignment(pixelformat) - 1, 0);
if ((pix->width != width) || (pix->height != height))
dev_dbg(delta->dev,
"%s V4L2 TRY_FMT (CAPTURE): resolution updated %dx%d -> %dx%d to fit min/max/alignment\n",
ctx->name, width, height, pix->width, pix->height);
/* default decoder alignment constraint */
width = ALIGN(pix->width, DELTA_WIDTH_ALIGNMENT);
height = ALIGN(pix->height, DELTA_HEIGHT_ALIGNMENT);
if ((pix->width != width) || (pix->height != height))
dev_dbg(delta->dev,
"%s V4L2 TRY_FMT (CAPTURE): resolution updated %dx%d -> %dx%d to fit decoder alignment\n",
ctx->name, width, height, pix->width, pix->height);
if (!pix->colorspace) {
pix->colorspace = V4L2_COLORSPACE_REC709;
pix->xfer_func = V4L2_XFER_FUNC_DEFAULT;
pix->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
pix->quantization = V4L2_QUANTIZATION_DEFAULT;
}
pix->width = width;
pix->height = height;
pix->bytesperline = frame_stride(pix->width, pixelformat);
pix->sizeimage = frame_size(pix->width, pix->height, pixelformat);
if (pix->field == V4L2_FIELD_ANY)
pix->field = V4L2_FIELD_NONE;
return 0;
}
static int delta_s_fmt_stream(struct file *file, void *fh,
struct v4l2_format *f)
{
struct delta_ctx *ctx = to_ctx(file->private_data);
struct delta_dev *delta = ctx->dev;
struct vb2_queue *vq;
struct v4l2_pix_format *pix = &f->fmt.pix;
int ret;
ret = delta_try_fmt_stream(file, fh, f);
if (ret) {
dev_dbg(delta->dev,
"%s V4L2 S_FMT (OUTPUT): unsupported format %4.4s\n",
ctx->name, (char *)&pix->pixelformat);
return ret;
}
vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
if (vb2_is_streaming(vq)) {
dev_dbg(delta->dev, "%s V4L2 S_FMT (OUTPUT): queue busy\n",
ctx->name);
return -EBUSY;
}
ctx->max_au_size = pix->sizeimage;
ctx->streaminfo.width = pix->width;
ctx->streaminfo.height = pix->height;
ctx->streaminfo.streamformat = pix->pixelformat;
ctx->streaminfo.colorspace = pix->colorspace;
ctx->streaminfo.xfer_func = pix->xfer_func;
ctx->streaminfo.ycbcr_enc = pix->ycbcr_enc;
ctx->streaminfo.quantization = pix->quantization;
ctx->flags |= DELTA_FLAG_STREAMINFO;
return 0;
}
static int delta_s_fmt_frame(struct file *file, void *fh, struct v4l2_format *f)
{
struct delta_ctx *ctx = to_ctx(file->private_data);
struct delta_dev *delta = ctx->dev;
const struct delta_dec *dec = ctx->dec;
struct v4l2_pix_format *pix = &f->fmt.pix;
struct delta_frameinfo frameinfo;
unsigned char str[100] = "";
struct vb2_queue *vq;
int ret;
vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
if (vb2_is_streaming(vq)) {
dev_dbg(delta->dev, "%s V4L2 S_FMT (CAPTURE): queue busy\n",
ctx->name);
return -EBUSY;
}
if (ctx->state < DELTA_STATE_READY) {
/*
* decoder not yet opened and valid stream header not found,
* could not negotiate format with decoder, check at least
* pixel format & negotiate resolution boundaries
* and alignment...
*/
ret = delta_try_fmt_frame(file, fh, f);
if (ret) {
dev_dbg(delta->dev,
"%s V4L2 S_FMT (CAPTURE): unsupported format %4.4s\n",
ctx->name, (char *)&pix->pixelformat);
return ret;
}
return 0;
}
/* set frame information to decoder */
memset(&frameinfo, 0, sizeof(frameinfo));
frameinfo.pixelformat = pix->pixelformat;
frameinfo.width = pix->width;
frameinfo.height = pix->height;
frameinfo.aligned_width = pix->width;
frameinfo.aligned_height = pix->height;
frameinfo.size = pix->sizeimage;
frameinfo.field = pix->field;
frameinfo.colorspace = pix->colorspace;
frameinfo.xfer_func = pix->xfer_func;
frameinfo.ycbcr_enc = pix->ycbcr_enc;
frameinfo.quantization = pix->quantization;
ret = call_dec_op(dec, set_frameinfo, ctx, &frameinfo);
if (ret)
return ret;
/* then get what decoder can really do */
ret = call_dec_op(dec, get_frameinfo, ctx, &frameinfo);
if (ret)
return ret;
ctx->flags |= DELTA_FLAG_FRAMEINFO;
ctx->frameinfo = frameinfo;
dev_dbg(delta->dev,
"%s V4L2 SET_FMT (CAPTURE): frameinfo updated to %s\n",
ctx->name,
delta_frameinfo_str(&frameinfo, str, sizeof(str)));
pix->pixelformat = frameinfo.pixelformat;
pix->width = frameinfo.aligned_width;
pix->height = frameinfo.aligned_height;
pix->bytesperline = frame_stride(pix->width, pix->pixelformat);
pix->sizeimage = frameinfo.size;
pix->field = frameinfo.field;
pix->colorspace = frameinfo.colorspace;
pix->xfer_func = frameinfo.xfer_func;
pix->ycbcr_enc = frameinfo.ycbcr_enc;
pix->quantization = frameinfo.quantization;
return 0;
}
static int delta_g_selection(struct file *file, void *fh,
struct v4l2_selection *s)
{
struct delta_ctx *ctx = to_ctx(fh);
struct delta_frameinfo *frameinfo = &ctx->frameinfo;
struct v4l2_rect crop;
if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if ((ctx->flags & DELTA_FLAG_FRAMEINFO) &&
(frameinfo->flags & DELTA_FRAMEINFO_FLAG_CROP)) {
crop = frameinfo->crop;
} else {
/* default to video dimensions */
crop.left = 0;
crop.top = 0;
crop.width = frameinfo->width;
crop.height = frameinfo->height;
}
switch (s->target) {
case V4L2_SEL_TGT_COMPOSE:
case V4L2_SEL_TGT_COMPOSE_DEFAULT:
/* visible area inside video */
s->r = crop;
break;
case V4L2_SEL_TGT_COMPOSE_PADDED:
case V4L2_SEL_TGT_COMPOSE_BOUNDS:
/* up to aligned dimensions */
s->r.left = 0;
s->r.top = 0;
s->r.width = frameinfo->aligned_width;
s->r.height = frameinfo->aligned_height;
break;
default:
return -EINVAL;
}
return 0;
}
static void delta_complete_eos(struct delta_ctx *ctx,
struct delta_frame *frame)
{
struct delta_dev *delta = ctx->dev;
const struct v4l2_event ev = {.type = V4L2_EVENT_EOS};
/*
* Send EOS to user:
* - by returning an empty frame flagged to V4L2_BUF_FLAG_LAST
* - and then send EOS event
*/
/* empty frame */
frame->info.size = 0;
/* set the last buffer flag */
frame->flags |= V4L2_BUF_FLAG_LAST;
/* release frame to user */
delta_frame_done(ctx, frame, 0);
/* send EOS event */
v4l2_event_queue_fh(&ctx->fh, &ev);
dev_dbg(delta->dev, "%s EOS completed\n", ctx->name);
}
static int delta_try_decoder_cmd(struct file *file, void *fh,
struct v4l2_decoder_cmd *cmd)
{
if (cmd->cmd != V4L2_DEC_CMD_STOP)
return -EINVAL;
if (cmd->flags & V4L2_DEC_CMD_STOP_TO_BLACK)
return -EINVAL;
if (!(cmd->flags & V4L2_DEC_CMD_STOP_IMMEDIATELY) &&
(cmd->stop.pts != 0))
return -EINVAL;
return 0;
}
static int delta_decoder_stop_cmd(struct delta_ctx *ctx, void *fh)
{
const struct delta_dec *dec = ctx->dec;
struct delta_dev *delta = ctx->dev;
struct delta_frame *frame = NULL;
int ret = 0;
dev_dbg(delta->dev, "%s EOS received\n", ctx->name);
if (ctx->state != DELTA_STATE_READY)
return 0;
/* drain the decoder */
call_dec_op(dec, drain, ctx);
/* release to user drained frames */
while (1) {
frame = NULL;
ret = call_dec_op(dec, get_frame, ctx, &frame);
if (ret == -ENODATA) {
/* no more decoded frames */
break;
}
if (frame) {
dev_dbg(delta->dev, "%s drain frame[%d]\n",
ctx->name, frame->index);
/* pop timestamp and mark frame with it */
delta_pop_dts(ctx, &frame->dts);
/* release decoded frame to user */
delta_frame_done(ctx, frame, 0);
}
}
/* try to complete EOS */
ret = delta_get_free_frame(ctx, &frame);
if (ret)
goto delay_eos;
/* new frame available, EOS can now be completed */
delta_complete_eos(ctx, frame);
ctx->state = DELTA_STATE_EOS;
return 0;
delay_eos:
/*
* EOS completion from driver is delayed because
* we don't have a free empty frame available.
* EOS completion is so delayed till next frame_queue() call
* to be sure to have a free empty frame available.
*/
ctx->state = DELTA_STATE_WF_EOS;
dev_dbg(delta->dev, "%s EOS delayed\n", ctx->name);
return 0;
}
static int delta_decoder_cmd(struct file *file, void *fh,
struct v4l2_decoder_cmd *cmd)
{
struct delta_ctx *ctx = to_ctx(fh);
int ret = 0;
ret = delta_try_decoder_cmd(file, fh, cmd);
if (ret)
return ret;
return delta_decoder_stop_cmd(ctx, fh);
}
static int delta_subscribe_event(struct v4l2_fh *fh,
const struct v4l2_event_subscription *sub)
{
switch (sub->type) {
case V4L2_EVENT_EOS:
return v4l2_event_subscribe(fh, sub, 2, NULL);
default:
return -EINVAL;
}
return 0;
}
/* v4l2 ioctl ops */
static const struct v4l2_ioctl_ops delta_ioctl_ops = {
.vidioc_querycap = delta_querycap,
.vidioc_enum_fmt_vid_cap = delta_enum_fmt_frame,
.vidioc_g_fmt_vid_cap = delta_g_fmt_frame,
.vidioc_try_fmt_vid_cap = delta_try_fmt_frame,
.vidioc_s_fmt_vid_cap = delta_s_fmt_frame,
.vidioc_enum_fmt_vid_out = delta_enum_fmt_stream,
.vidioc_g_fmt_vid_out = delta_g_fmt_stream,
.vidioc_try_fmt_vid_out = delta_try_fmt_stream,
.vidioc_s_fmt_vid_out = delta_s_fmt_stream,
.vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
.vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
.vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
.vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
.vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
.vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
.vidioc_streamon = v4l2_m2m_ioctl_streamon,
.vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
.vidioc_g_selection = delta_g_selection,
.vidioc_try_decoder_cmd = delta_try_decoder_cmd,
.vidioc_decoder_cmd = delta_decoder_cmd,
.vidioc_subscribe_event = delta_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
/*
* mem-to-mem operations
*/
static void delta_run_work(struct work_struct *work)
{
struct delta_ctx *ctx = container_of(work, struct delta_ctx, run_work);
struct delta_dev *delta = ctx->dev;
const struct delta_dec *dec = ctx->dec;
struct delta_au *au;
struct delta_frame *frame = NULL;
int ret = 0;
bool discard = false;
struct vb2_v4l2_buffer *vbuf;
if (!dec) {
dev_err(delta->dev, "%s no decoder opened yet\n", ctx->name);
return;
}
/* protect instance against reentrancy */
mutex_lock(&ctx->lock);
vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
if (!vbuf) {
dev_err(delta->dev, "%s no buffer to decode\n", ctx->name);
mutex_unlock(&ctx->lock);
return;
}
au = to_au(vbuf);
au->size = vb2_get_plane_payload(&vbuf->vb2_buf, 0);
au->dts = vbuf->vb2_buf.timestamp;
/* dump access unit */
dump_au(ctx, au);
/* enable the hardware */
if (!dec->pm) {
ret = delta_get_sync(ctx);
if (ret)
goto err;
}
/* decode this access unit */
ret = call_dec_op(dec, decode, ctx, au);
/*
* if the (-ENODATA) value is returned, it refers to the interlaced
* stream case for which 2 access units are needed to get 1 frame.
* So, this returned value doesn't mean that the decoding fails, but
* indicates that the timestamp information of the access unit shall
* not be taken into account, and that the V4L2 buffer associated with
* the access unit shall be flagged with V4L2_BUF_FLAG_ERROR to inform
* the user of this situation
*/
if (ret == -ENODATA) {
discard = true;
} else if (ret) {
dev_err(delta->dev, "%s decoding failed (%d)\n",
ctx->name, ret);
/* disable the hardware */
if (!dec->pm)
delta_put_autosuspend(ctx);
goto err;
}
/* disable the hardware */
if (!dec->pm)
delta_put_autosuspend(ctx);
/* push au timestamp in FIFO */
if (!discard)
delta_push_dts(ctx, au->dts);
/* get available decoded frames */
while (1) {
ret = call_dec_op(dec, get_frame, ctx, &frame);
if (ret == -ENODATA) {
/* no more decoded frames */
goto out;
}
if (ret) {
dev_err(delta->dev, "%s cannot get decoded frame (%d)\n",
ctx->name, ret);
goto out;
}
if (!frame) {
dev_err(delta->dev,
"%s NULL decoded frame\n",
ctx->name);
ret = -EIO;
goto out;
}
/* pop timestamp and mark frame with it */
delta_pop_dts(ctx, &frame->dts);
/* release decoded frame to user */
delta_frame_done(ctx, frame, 0);
}
out:
requeue_free_frames(ctx);
delta_au_done(ctx, au, (discard ? -ENODATA : 0));
mutex_unlock(&ctx->lock);
v4l2_m2m_job_finish(delta->m2m_dev, ctx->fh.m2m_ctx);
return;
err:
requeue_free_frames(ctx);
delta_au_done(ctx, au, ret);
mutex_unlock(&ctx->lock);
v4l2_m2m_job_finish(delta->m2m_dev, ctx->fh.m2m_ctx);
}
static void delta_device_run(void *priv)
{
struct delta_ctx *ctx = priv;
struct delta_dev *delta = ctx->dev;
queue_work(delta->work_queue, &ctx->run_work);
}
static void delta_job_abort(void *priv)
{
struct delta_ctx *ctx = priv;
struct delta_dev *delta = ctx->dev;
dev_dbg(delta->dev, "%s aborting job\n", ctx->name);
ctx->aborting = true;
}
static int delta_job_ready(void *priv)
{
struct delta_ctx *ctx = priv;
struct delta_dev *delta = ctx->dev;
int src_bufs = v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx);
if (!src_bufs) {
dev_dbg(delta->dev, "%s not ready: not enough video buffers.\n",
ctx->name);
return 0;
}
if (!v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx)) {
dev_dbg(delta->dev, "%s not ready: not enough video capture buffers.\n",
ctx->name);
return 0;
}
if (ctx->aborting) {
dev_dbg(delta->dev, "%s job not ready: aborting\n", ctx->name);
return 0;
}
dev_dbg(delta->dev, "%s job ready\n", ctx->name);
return 1;
}
/* mem-to-mem ops */
static const struct v4l2_m2m_ops delta_m2m_ops = {
.device_run = delta_device_run,
.job_ready = delta_job_ready,
.job_abort = delta_job_abort,
.lock = delta_lock,
.unlock = delta_unlock,
};
/*
* VB2 queue operations
*/
static int delta_vb2_au_queue_setup(struct vb2_queue *vq,
unsigned int *num_buffers,
unsigned int *num_planes,
unsigned int sizes[],
struct device *alloc_devs[])
{
struct delta_ctx *ctx = vb2_get_drv_priv(vq);
unsigned int size = ctx->max_au_size;
if (*num_planes)
return sizes[0] < size ? -EINVAL : 0;
*num_planes = 1;
if (*num_buffers < 1)
*num_buffers = 1;
if (*num_buffers > DELTA_MAX_AUS)
*num_buffers = DELTA_MAX_AUS;
sizes[0] = size;
return 0;
}
static int delta_vb2_au_prepare(struct vb2_buffer *vb)
{
struct vb2_queue *q = vb->vb2_queue;
struct delta_ctx *ctx = vb2_get_drv_priv(q);
struct delta_dev *delta = ctx->dev;
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct delta_au *au = to_au(vbuf);
if (!au->prepared) {
/* get memory addresses */
au->vaddr = vb2_plane_vaddr(&au->vbuf.vb2_buf, 0);
au->paddr = vb2_dma_contig_plane_dma_addr
(&au->vbuf.vb2_buf, 0);
au->prepared = true;
dev_dbg(delta->dev, "%s au[%d] prepared; virt=0x%p, phy=0x%pad\n",
ctx->name, vb->index, au->vaddr, &au->paddr);
}
if (vbuf->field == V4L2_FIELD_ANY)
vbuf->field = V4L2_FIELD_NONE;
return 0;
}
static int delta_setup_frame(struct delta_ctx *ctx,
struct delta_frame *frame)
{
struct delta_dev *delta = ctx->dev;
const struct delta_dec *dec = ctx->dec;
if (frame->index >= DELTA_MAX_FRAMES) {
dev_err(delta->dev,
"%s frame index=%d exceeds output frame count (%d)\n",
ctx->name, frame->index, DELTA_MAX_FRAMES);
return -EINVAL;
}
if (ctx->nb_of_frames >= DELTA_MAX_FRAMES) {
dev_err(delta->dev,
"%s number of frames exceeds output frame count (%d > %d)\n",
ctx->name, ctx->nb_of_frames, DELTA_MAX_FRAMES);
return -EINVAL;
}
if (frame->index != ctx->nb_of_frames) {
dev_warn(delta->dev,
"%s frame index discontinuity detected, expected %d, got %d\n",
ctx->name, ctx->nb_of_frames, frame->index);
}
frame->state = DELTA_FRAME_FREE;
ctx->frames[ctx->nb_of_frames] = frame;
ctx->nb_of_frames++;
/* setup frame on decoder side */
return call_dec_op(dec, setup_frame, ctx, frame);
}
/*
* default implementation of get_frameinfo decoder ops
* matching frame information from stream information
* & with default pixel format & default alignment.
*/
int delta_get_frameinfo_default(struct delta_ctx *ctx,
struct delta_frameinfo *frameinfo)
{
struct delta_streaminfo *streaminfo = &ctx->streaminfo;
memset(frameinfo, 0, sizeof(*frameinfo));
frameinfo->pixelformat = V4L2_PIX_FMT_NV12;
frameinfo->width = streaminfo->width;
frameinfo->height = streaminfo->height;
frameinfo->aligned_width = ALIGN(streaminfo->width,
DELTA_WIDTH_ALIGNMENT);
frameinfo->aligned_height = ALIGN(streaminfo->height,
DELTA_HEIGHT_ALIGNMENT);
frameinfo->size = frame_size(frameinfo->aligned_width,
frameinfo->aligned_height,
frameinfo->pixelformat);
if (streaminfo->flags & DELTA_STREAMINFO_FLAG_CROP) {
frameinfo->flags |= DELTA_FRAMEINFO_FLAG_CROP;
frameinfo->crop = streaminfo->crop;
}
if (streaminfo->flags & DELTA_STREAMINFO_FLAG_PIXELASPECT) {
frameinfo->flags |= DELTA_FRAMEINFO_FLAG_PIXELASPECT;
frameinfo->pixelaspect = streaminfo->pixelaspect;
}
frameinfo->field = streaminfo->field;
return 0;
}
/*
* default implementation of recycle decoder ops
* consisting to relax the "decoded" frame state
*/
int delta_recycle_default(struct delta_ctx *pctx,
struct delta_frame *frame)
{
frame->state &= ~DELTA_FRAME_DEC;
return 0;
}
static void dump_frames_status(struct delta_ctx *ctx)
{
struct delta_dev *delta = ctx->dev;
unsigned int i;
struct delta_frame *frame;
unsigned char str[100] = "";
dev_info(delta->dev,
"%s dumping frames status...\n", ctx->name);
for (i = 0; i < ctx->nb_of_frames; i++) {
frame = ctx->frames[i];
dev_info(delta->dev,
"%s frame[%d] %s\n",
ctx->name, frame->index,
frame_state_str(frame->state,
str, sizeof(str)));
}
}
int delta_get_free_frame(struct delta_ctx *ctx,
struct delta_frame **pframe)
{
struct delta_dev *delta = ctx->dev;
struct vb2_v4l2_buffer *vbuf;
struct delta_frame *frame;
*pframe = NULL;
vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
if (!vbuf) {
dev_err(delta->dev, "%s no frame available",
ctx->name);
return -EIO;
}
frame = to_frame(vbuf);
frame->state &= ~DELTA_FRAME_M2M;
if (frame->state != DELTA_FRAME_FREE) {
dev_err(delta->dev,
"%s frame[%d] is not free\n",
ctx->name, frame->index);
dump_frames_status(ctx);
return -ENODATA;
}
dev_dbg(delta->dev,
"%s get free frame[%d]\n", ctx->name, frame->index);
*pframe = frame;
return 0;
}
int delta_get_sync(struct delta_ctx *ctx)
{
struct delta_dev *delta = ctx->dev;
int ret = 0;
/* enable the hardware */
ret = pm_runtime_get_sync(delta->dev);
if (ret < 0) {
dev_err(delta->dev, "%s pm_runtime_get_sync failed (%d)\n",
__func__, ret);
return ret;
}
return 0;
}
void delta_put_autosuspend(struct delta_ctx *ctx)
{
struct delta_dev *delta = ctx->dev;
pm_runtime_put_autosuspend(delta->dev);
}
static void delta_vb2_au_queue(struct vb2_buffer *vb)
{
struct vb2_queue *q = vb->vb2_queue;
struct delta_ctx *ctx = vb2_get_drv_priv(q);
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
}
static int delta_vb2_au_start_streaming(struct vb2_queue *q,
unsigned int count)
{
struct delta_ctx *ctx = vb2_get_drv_priv(q);
struct delta_dev *delta = ctx->dev;
const struct delta_dec *dec = ctx->dec;
struct delta_au *au;
int ret = 0;
struct vb2_v4l2_buffer *vbuf = NULL;
struct delta_streaminfo *streaminfo = &ctx->streaminfo;
struct delta_frameinfo *frameinfo = &ctx->frameinfo;
unsigned char str1[100] = "";
unsigned char str2[100] = "";
if ((ctx->state != DELTA_STATE_WF_FORMAT) &&
(ctx->state != DELTA_STATE_WF_STREAMINFO))
return 0;
if (ctx->state == DELTA_STATE_WF_FORMAT) {
/* open decoder if not yet done */
ret = delta_open_decoder(ctx,
ctx->streaminfo.streamformat,
ctx->frameinfo.pixelformat, &dec);
if (ret)
goto err;
ctx->dec = dec;
ctx->state = DELTA_STATE_WF_STREAMINFO;
}
/*
* first buffer should contain stream header,
* decode it to get the infos related to stream
* such as width, height, dpb, ...
*/
vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
if (!vbuf) {
dev_err(delta->dev, "%s failed to start streaming, no stream header buffer enqueued\n",
ctx->name);
ret = -EINVAL;
goto err;
}
au = to_au(vbuf);
au->size = vb2_get_plane_payload(&vbuf->vb2_buf, 0);
au->dts = vbuf->vb2_buf.timestamp;
delta_push_dts(ctx, au->dts);
/* dump access unit */
dump_au(ctx, au);
/* decode this access unit */
ret = call_dec_op(dec, decode, ctx, au);
if (ret) {
dev_err(delta->dev, "%s failed to start streaming, header decoding failed (%d)\n",
ctx->name, ret);
goto err;
}
ret = call_dec_op(dec, get_streaminfo, ctx, streaminfo);
if (ret) {
dev_dbg_ratelimited(delta->dev,
"%s failed to start streaming, valid stream header not yet decoded\n",
ctx->name);
goto err;
}
ctx->flags |= DELTA_FLAG_STREAMINFO;
ret = call_dec_op(dec, get_frameinfo, ctx, frameinfo);
if (ret)
goto err;
ctx->flags |= DELTA_FLAG_FRAMEINFO;
ctx->state = DELTA_STATE_READY;
dev_dbg(delta->dev, "%s %s => %s\n", ctx->name,
delta_streaminfo_str(streaminfo, str1, sizeof(str1)),
delta_frameinfo_str(frameinfo, str2, sizeof(str2)));
delta_au_done(ctx, au, ret);
return 0;
err:
/*
* return all buffers to vb2 in QUEUED state.
* This will give ownership back to userspace
*/
if (vbuf)
v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_QUEUED);
while ((vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_QUEUED);
return ret;
}
static void delta_vb2_au_stop_streaming(struct vb2_queue *q)
{
struct delta_ctx *ctx = vb2_get_drv_priv(q);
struct vb2_v4l2_buffer *vbuf;
delta_flush_dts(ctx);
/* return all buffers to vb2 in ERROR state */
while ((vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
ctx->au_num = 0;
ctx->aborting = false;
}
static int delta_vb2_frame_queue_setup(struct vb2_queue *vq,
unsigned int *num_buffers,
unsigned int *num_planes,
unsigned int sizes[],
struct device *alloc_devs[])
{
struct delta_ctx *ctx = vb2_get_drv_priv(vq);
struct delta_dev *delta = ctx->dev;
struct delta_streaminfo *streaminfo = &ctx->streaminfo;
struct delta_frameinfo *frameinfo = &ctx->frameinfo;
unsigned int size = frameinfo->size;
/*
* the number of output buffers needed for decoding =
* user need (*num_buffers given, usually for display pipeline) +
* stream need (streaminfo->dpb) +
* decoding peak smoothing (depends on DELTA IP perf)
*/
if (*num_buffers < DELTA_MIN_FRAME_USER) {
dev_dbg(delta->dev,
"%s num_buffers too low (%d), increasing to %d\n",
ctx->name, *num_buffers, DELTA_MIN_FRAME_USER);
*num_buffers = DELTA_MIN_FRAME_USER;
}
*num_buffers += streaminfo->dpb + DELTA_PEAK_FRAME_SMOOTHING;
if (*num_buffers > DELTA_MAX_FRAMES) {
dev_dbg(delta->dev,
"%s output frame count too high (%d), cut to %d\n",
ctx->name, *num_buffers, DELTA_MAX_FRAMES);
*num_buffers = DELTA_MAX_FRAMES;
}
if (*num_planes)
return sizes[0] < size ? -EINVAL : 0;
/* single plane for Y and CbCr */
*num_planes = 1;
sizes[0] = size;
ctx->nb_of_frames = 0;
return 0;
}
static int delta_vb2_frame_prepare(struct vb2_buffer *vb)
{
struct vb2_queue *q = vb->vb2_queue;
struct delta_ctx *ctx = vb2_get_drv_priv(q);
struct delta_dev *delta = ctx->dev;
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct delta_frame *frame = to_frame(vbuf);
int ret = 0;
if (!frame->prepared) {
frame->index = vbuf->vb2_buf.index;
frame->vaddr = vb2_plane_vaddr(&vbuf->vb2_buf, 0);
frame->paddr = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
frame->info = ctx->frameinfo;
ret = delta_setup_frame(ctx, frame);
if (ret) {
dev_err(delta->dev,
"%s setup_frame() failed (%d)\n",
ctx->name, ret);
return ret;
}
frame->prepared = true;
dev_dbg(delta->dev,
"%s frame[%d] prepared; virt=0x%p, phy=0x%pad\n",
ctx->name, vb->index, frame->vaddr,
&frame->paddr);
}
frame->flags = vbuf->flags;
return 0;
}
static void delta_vb2_frame_finish(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct delta_frame *frame = to_frame(vbuf);
/* update V4L2 fields for user */
vb2_set_plane_payload(&vbuf->vb2_buf, 0, frame->info.size);
vb->timestamp = frame->dts;
vbuf->field = frame->field;
vbuf->flags = frame->flags;
}
static void delta_vb2_frame_queue(struct vb2_buffer *vb)
{
struct vb2_queue *q = vb->vb2_queue;
struct delta_ctx *ctx = vb2_get_drv_priv(q);
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct delta_frame *frame = to_frame(vbuf);
if (ctx->state == DELTA_STATE_WF_EOS) {
/* new frame available, EOS can now be completed */
delta_complete_eos(ctx, frame);
ctx->state = DELTA_STATE_EOS;
/* return, no need to recycle this buffer to decoder */
return;
}
/* recycle this frame */
delta_recycle(ctx, frame);
}
static void delta_vb2_frame_stop_streaming(struct vb2_queue *q)
{
struct delta_ctx *ctx = vb2_get_drv_priv(q);
struct vb2_v4l2_buffer *vbuf;
struct delta_frame *frame;
const struct delta_dec *dec = ctx->dec;
unsigned int i;
delta_flush_dts(ctx);
call_dec_op(dec, flush, ctx);
/*
* return all buffers to vb2 in ERROR state
* & reset each frame state to OUT
*/
for (i = 0; i < ctx->nb_of_frames; i++) {
frame = ctx->frames[i];
if (!(frame->state & DELTA_FRAME_OUT)) {
vbuf = &frame->vbuf;
v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
}
frame->state = DELTA_FRAME_OUT;
}
ctx->frame_num = 0;
ctx->aborting = false;
}
/* VB2 queue ops */
static const struct vb2_ops delta_vb2_au_ops = {
.queue_setup = delta_vb2_au_queue_setup,
.buf_prepare = delta_vb2_au_prepare,
.buf_queue = delta_vb2_au_queue,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
.start_streaming = delta_vb2_au_start_streaming,
.stop_streaming = delta_vb2_au_stop_streaming,
};
static const struct vb2_ops delta_vb2_frame_ops = {
.queue_setup = delta_vb2_frame_queue_setup,
.buf_prepare = delta_vb2_frame_prepare,
.buf_finish = delta_vb2_frame_finish,
.buf_queue = delta_vb2_frame_queue,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
.stop_streaming = delta_vb2_frame_stop_streaming,
};
/*
* V4L2 file operations
*/
static int queue_init(void *priv,
struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
{
struct vb2_queue *q;
struct delta_ctx *ctx = priv;
struct delta_dev *delta = ctx->dev;
int ret;
/* setup vb2 queue for stream input */
q = src_vq;
q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
q->io_modes = VB2_MMAP | VB2_DMABUF;
q->drv_priv = ctx;
/* overload vb2 buf with private au struct */
q->buf_struct_size = sizeof(struct delta_au);
q->ops = &delta_vb2_au_ops;
q->mem_ops = &vb2_dma_contig_memops;
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
q->lock = &delta->lock;
q->dev = delta->dev;
ret = vb2_queue_init(q);
if (ret)
return ret;
/* setup vb2 queue for frame output */
q = dst_vq;
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
q->io_modes = VB2_MMAP | VB2_DMABUF;
q->drv_priv = ctx;
/* overload vb2 buf with private frame struct */
q->buf_struct_size = sizeof(struct delta_frame)
+ DELTA_MAX_FRAME_PRIV_SIZE;
q->ops = &delta_vb2_frame_ops;
q->mem_ops = &vb2_dma_contig_memops;
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
q->lock = &delta->lock;
q->dev = delta->dev;
return vb2_queue_init(q);
}
static int delta_open(struct file *file)
{
struct delta_dev *delta = video_drvdata(file);
struct delta_ctx *ctx = NULL;
int ret = 0;
mutex_lock(&delta->lock);
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx) {
ret = -ENOMEM;
goto err;
}
ctx->dev = delta;
v4l2_fh_init(&ctx->fh, video_devdata(file));
file->private_data = &ctx->fh;
v4l2_fh_add(&ctx->fh);
INIT_WORK(&ctx->run_work, delta_run_work);
mutex_init(&ctx->lock);
ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(delta->m2m_dev, ctx,
queue_init);
if (IS_ERR(ctx->fh.m2m_ctx)) {
ret = PTR_ERR(ctx->fh.m2m_ctx);
dev_err(delta->dev, "%s failed to initialize m2m context (%d)\n",
DELTA_PREFIX, ret);
goto err_fh_del;
}
/*
* wait stream format to determine which
* decoder to open
*/
ctx->state = DELTA_STATE_WF_FORMAT;
INIT_LIST_HEAD(&ctx->dts);
/* set the instance name */
delta->instance_id++;
snprintf(ctx->name, sizeof(ctx->name), "[%3d:----]",
delta->instance_id);
/* default parameters for frame and stream */
set_default_params(ctx);
/* enable ST231 clocks */
if (delta->clk_st231)
if (clk_prepare_enable(delta->clk_st231))
dev_warn(delta->dev, "failed to enable st231 clk\n");
/* enable FLASH_PROMIP clock */
if (delta->clk_flash_promip)
if (clk_prepare_enable(delta->clk_flash_promip))
dev_warn(delta->dev, "failed to enable delta promip clk\n");
mutex_unlock(&delta->lock);
dev_dbg(delta->dev, "%s decoder instance created\n", ctx->name);
return 0;
err_fh_del:
v4l2_fh_del(&ctx->fh);
v4l2_fh_exit(&ctx->fh);
kfree(ctx);
err:
mutex_unlock(&delta->lock);
return ret;
}
static int delta_release(struct file *file)
{
struct delta_ctx *ctx = to_ctx(file->private_data);
struct delta_dev *delta = ctx->dev;
const struct delta_dec *dec = ctx->dec;
mutex_lock(&delta->lock);
/* close decoder */
call_dec_op(dec, close, ctx);
/*
* trace a summary of instance
* before closing (debug purpose)
*/
delta_trace_summary(ctx);
v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
v4l2_fh_del(&ctx->fh);
v4l2_fh_exit(&ctx->fh);
/* disable ST231 clocks */
if (delta->clk_st231)
clk_disable_unprepare(delta->clk_st231);
/* disable FLASH_PROMIP clock */
if (delta->clk_flash_promip)
clk_disable_unprepare(delta->clk_flash_promip);
dev_dbg(delta->dev, "%s decoder instance released\n", ctx->name);
kfree(ctx);
mutex_unlock(&delta->lock);
return 0;
}
/* V4L2 file ops */
static const struct v4l2_file_operations delta_fops = {
.owner = THIS_MODULE,
.open = delta_open,
.release = delta_release,
.unlocked_ioctl = video_ioctl2,
.mmap = v4l2_m2m_fop_mmap,
.poll = v4l2_m2m_fop_poll,
};
/*
* Platform device operations
*/
static int delta_register_device(struct delta_dev *delta)
{
int ret;
struct video_device *vdev;
if (!delta)
return -ENODEV;
delta->m2m_dev = v4l2_m2m_init(&delta_m2m_ops);
if (IS_ERR(delta->m2m_dev)) {
dev_err(delta->dev, "%s failed to initialize v4l2-m2m device\n",
DELTA_PREFIX);
ret = PTR_ERR(delta->m2m_dev);
goto err;
}
vdev = video_device_alloc();
if (!vdev) {
dev_err(delta->dev, "%s failed to allocate video device\n",
DELTA_PREFIX);
ret = -ENOMEM;
goto err_m2m_release;
}
vdev->fops = &delta_fops;
vdev->ioctl_ops = &delta_ioctl_ops;
vdev->release = video_device_release;
vdev->lock = &delta->lock;
vdev->vfl_dir = VFL_DIR_M2M;
vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
vdev->v4l2_dev = &delta->v4l2_dev;
snprintf(vdev->name, sizeof(vdev->name), "%s-%s",
DELTA_NAME, DELTA_FW_VERSION);
ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
if (ret) {
dev_err(delta->dev, "%s failed to register video device\n",
DELTA_PREFIX);
goto err_vdev_release;
}
delta->vdev = vdev;
video_set_drvdata(vdev, delta);
return 0;
err_vdev_release:
video_device_release(vdev);
err_m2m_release:
v4l2_m2m_release(delta->m2m_dev);
err:
return ret;
}
static void delta_unregister_device(struct delta_dev *delta)
{
if (!delta)
return;
if (delta->m2m_dev)
v4l2_m2m_release(delta->m2m_dev);
video_unregister_device(delta->vdev);
}
static int delta_probe(struct platform_device *pdev)
{
struct delta_dev *delta;
struct device *dev = &pdev->dev;
int ret;
delta = devm_kzalloc(dev, sizeof(*delta), GFP_KERNEL);
if (!delta) {
ret = -ENOMEM;
goto err;
}
delta->dev = dev;
delta->pdev = pdev;
platform_set_drvdata(pdev, delta);
mutex_init(&delta->lock);
/* get clock resources */
delta->clk_delta = devm_clk_get(dev, "delta");
if (IS_ERR(delta->clk_delta)) {
dev_dbg(dev, "%s can't get delta clock\n", DELTA_PREFIX);
delta->clk_delta = NULL;
}
delta->clk_st231 = devm_clk_get(dev, "delta-st231");
if (IS_ERR(delta->clk_st231)) {
dev_dbg(dev, "%s can't get delta-st231 clock\n", DELTA_PREFIX);
delta->clk_st231 = NULL;
}
delta->clk_flash_promip = devm_clk_get(dev, "delta-flash-promip");
if (IS_ERR(delta->clk_flash_promip)) {
dev_dbg(dev, "%s can't get delta-flash-promip clock\n",
DELTA_PREFIX);
delta->clk_flash_promip = NULL;
}
/* init pm_runtime used for power management */
pm_runtime_set_autosuspend_delay(dev, DELTA_HW_AUTOSUSPEND_DELAY_MS);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_suspended(dev);
pm_runtime_enable(dev);
/* init firmware ipc channel */
ret = delta_ipc_init(delta);
if (ret) {
dev_err(delta->dev, "%s failed to initialize firmware ipc channel\n",
DELTA_PREFIX);
goto err;
}
/* register all available decoders */
register_decoders(delta);
/* register all supported formats */
register_formats(delta);
/* register on V4L2 */
ret = v4l2_device_register(dev, &delta->v4l2_dev);
if (ret) {
dev_err(delta->dev, "%s failed to register V4L2 device\n",
DELTA_PREFIX);
goto err;
}
delta->work_queue = create_workqueue(DELTA_NAME);
if (!delta->work_queue) {
dev_err(delta->dev, "%s failed to allocate work queue\n",
DELTA_PREFIX);
ret = -ENOMEM;
goto err_v4l2;
}
/* register device */
ret = delta_register_device(delta);
if (ret)
goto err_work_queue;
dev_info(dev, "%s %s registered as /dev/video%d\n",
DELTA_PREFIX, delta->vdev->name, delta->vdev->num);
return 0;
err_work_queue:
destroy_workqueue(delta->work_queue);
err_v4l2:
v4l2_device_unregister(&delta->v4l2_dev);
err:
return ret;
}
static int delta_remove(struct platform_device *pdev)
{
struct delta_dev *delta = platform_get_drvdata(pdev);
delta_ipc_exit(delta);
delta_unregister_device(delta);
destroy_workqueue(delta->work_queue);
pm_runtime_put_autosuspend(delta->dev);
pm_runtime_disable(delta->dev);
v4l2_device_unregister(&delta->v4l2_dev);
return 0;
}
static int delta_runtime_suspend(struct device *dev)
{
struct delta_dev *delta = dev_get_drvdata(dev);
if (delta->clk_delta)
clk_disable_unprepare(delta->clk_delta);
return 0;
}
static int delta_runtime_resume(struct device *dev)
{
struct delta_dev *delta = dev_get_drvdata(dev);
if (delta->clk_delta)
if (clk_prepare_enable(delta->clk_delta))
dev_warn(dev, "failed to prepare/enable delta clk\n");
return 0;
}
/* PM ops */
static const struct dev_pm_ops delta_pm_ops = {
.runtime_suspend = delta_runtime_suspend,
.runtime_resume = delta_runtime_resume,
};
static const struct of_device_id delta_match_types[] = {
{
.compatible = "st,st-delta",
},
{
/* end node */
}
};
MODULE_DEVICE_TABLE(of, delta_match_types);
static struct platform_driver delta_driver = {
.probe = delta_probe,
.remove = delta_remove,
.driver = {
.name = DELTA_NAME,
.of_match_table = delta_match_types,
.pm = &delta_pm_ops},
};
module_platform_driver(delta_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Hugues Fruchet <hugues.fruchet@st.com>");
MODULE_DESCRIPTION("STMicroelectronics DELTA video decoder V4L2 driver");