static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
{
struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
struct isp_buffer *buffer = to_isp_buffer(buf);
struct isp_video *video = vfh->video;
unsigned long addr;
/* Refuse to prepare the buffer is the video node has registered an
* error. We don't need to take any lock here as the operation is
* inherently racy. The authoritative check will be performed in the
* queue handler, which can't return an error, this check is just a best
* effort to notify userspace as early as possible.
*/
if (unlikely(video->error))
return -EIO;
addr = ispmmu_vmap(video->isp, buf->sglist, buf->sglen);
if (IS_ERR_VALUE(addr))
return -EIO;
if (!IS_ALIGNED(addr, 32)) {
dev_dbg(video->isp->dev, "Buffer address must be "
"aligned to 32 bytes boundary.\n");
ispmmu_vunmap(video->isp, buffer->isp_addr);
return -EINVAL;
}
buf->vbuf.bytesused = vfh->format.fmt.pix.sizeimage;
buffer->isp_addr = addr;
return 0;
}
static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
{
struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
struct isp_buffer *buffer = to_isp_buffer(buf);
struct isp_video *video = vfh->video;
unsigned long addr;
addr = ispmmu_vmap(video->isp, buf->sglist, buf->sglen);
if (IS_ERR_VALUE(addr))
return -EIO;
if (!IS_ALIGNED(addr, 32)) {
dev_dbg(video->isp->dev, "Buffer address must be "
"aligned to 32 bytes boundary.\n");
ispmmu_vunmap(video->isp, buffer->isp_addr);
return -EINVAL;
}
buf->vbuf.bytesused = vfh->format.fmt.pix.sizeimage;
buffer->isp_addr = addr;
return 0;
}
/**
* prev2resz_vbq_prepare - Videobuffer is prepared and mmapped.
*/
static int prev2resz_vbq_prepare(struct videobuf_queue *q,
struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct prev2resz_fhdl *fhdl = q->priv_data;
struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
dma_addr_t isp_addr;
int err = 0;
if (!vb->baddr) {
dev_err(p2r_device, "%s: No user buffer allocated\n",
__func__);
return -EINVAL;
}
if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
spin_lock(&fhdl->dst_vbq_lock);
vb->size = fhdl->pipe.out.image.bytesperline *
fhdl->pipe.out.image.height;
vb->width = fhdl->pipe.out.image.width;
vb->height = fhdl->pipe.out.image.height;
vb->bsize = vb->size;
vb->field = field;
spin_unlock(&fhdl->dst_vbq_lock);
} else if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
spin_lock(&fhdl->src_vbq_lock);
vb->size = fhdl->pipe.in.image.bytesperline *
fhdl->pipe.in.image.height;
vb->width = fhdl->pipe.in.image.width;
vb->height = fhdl->pipe.in.image.height;
vb->bsize = vb->size;
vb->field = field;
spin_unlock(&fhdl->src_vbq_lock);
} else {
return -EINVAL;
}
if (vb->state == VIDEOBUF_NEEDS_INIT) {
dev_dbg(p2r_device, "baddr = %08x\n", (int)vb->baddr);
err = videobuf_iolock(q, vb, NULL);
if (!err) {
isp_addr = ispmmu_vmap(fhdl->isp, dma->sglist,
dma->sglen);
if (!isp_addr) {
err = -EIO;
} else {
if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
fhdl->dst_buff_addr = isp_addr;
else if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
fhdl->src_buff_addr = isp_addr;
else
return -EINVAL;
}
}
}
if (!err) {
if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
spin_lock(&fhdl->dst_vbq_lock);
vb->state = VIDEOBUF_PREPARED;
spin_unlock(&fhdl->dst_vbq_lock);
} else if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
spin_lock(&fhdl->src_vbq_lock);
vb->state = VIDEOBUF_PREPARED;
spin_unlock(&fhdl->src_vbq_lock);
}
} else {
prev2resz_vbq_release(q, vb);
}
return err;
}