Esempio n. 1
0
static int buffer_prepare(struct vb2_buffer *vb)
{
	struct cx23885_dev *dev = vb->vb2_queue->drv_priv;
	struct cx23885_buffer *buf = container_of(vb,
		struct cx23885_buffer, vb);
	struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
	unsigned lines = VBI_PAL_LINE_COUNT;
	int ret;

	if (dev->tvnorm & V4L2_STD_525_60)
		lines = VBI_NTSC_LINE_COUNT;

	if (vb2_plane_size(vb, 0) < lines * VBI_LINE_LENGTH * 2)
		return -EINVAL;
	vb2_set_plane_payload(vb, 0, lines * VBI_LINE_LENGTH * 2);

	ret = dma_map_sg(&dev->pci->dev, sgt->sgl, sgt->nents, DMA_FROM_DEVICE);
	if (!ret)
		return -EIO;

	cx23885_risc_vbibuffer(dev->pci, &buf->risc,
			 sgt->sgl,
			 0, VBI_LINE_LENGTH * lines,
			 VBI_LINE_LENGTH, 0,
			 lines);
	return 0;
}
Esempio n. 2
0
static int video_buf_init(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
	struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer,
						   vb);
	const struct v4l2_pix_format_mplane *format =
						&video->active_fmt.fmt.pix_mp;
	struct sg_table *sgt;
	unsigned int i;

	for (i = 0; i < format->num_planes; i++) {
		sgt = vb2_dma_sg_plane_desc(vb, i);
		if (!sgt)
			return -EFAULT;

		buffer->addr[i] = sg_dma_address(sgt->sgl);
	}

	if (format->pixelformat == V4L2_PIX_FMT_NV12 ||
			format->pixelformat == V4L2_PIX_FMT_NV21 ||
			format->pixelformat == V4L2_PIX_FMT_NV16 ||
			format->pixelformat == V4L2_PIX_FMT_NV61)
		buffer->addr[1] = buffer->addr[0] +
				format->plane_fmt[0].bytesperline *
				format->height;

	return 0;
}
Esempio n. 3
0
unsigned long saa7134_buffer_base(struct saa7134_buf *buf)
{
	unsigned long base;
	struct sg_table *dma = vb2_dma_sg_plane_desc(&buf->vb2, 0);

	base  = saa7134_buffer_startpage(buf) * 4096;
	base += dma->sgl[0].offset;
	return base;
}
Esempio n. 4
0
static int fthd_buffer_prepare(struct vb2_buffer *vb)
{
	struct fthd_private *dev_priv = vb2_get_drv_priv(vb->vb2_queue);
	struct sg_table *sgtable;
	struct h2t_buf_ctx *ctx = NULL;
	struct dma_descriptor_list *dma_list;
	int i;

	pr_debug("%p\n", vb);
	for(i = 0; i < FTHD_BUFFERS; i++) {
		if (dev_priv->h2t_bufs[i].state == BUF_FREE ||
		    (dev_priv->h2t_bufs[i].state == BUF_ALLOC && dev_priv->h2t_bufs[i].vb == vb)) {
			ctx = dev_priv->h2t_bufs + i;
			break;
		}
	}

	if (!ctx)
		return -ENOBUFS;

	if (ctx->state == BUF_FREE) {
		pr_debug("allocating new entry\n");
		ctx->dma_desc_obj = isp_mem_create(dev_priv, FTHD_MEM_BUFFER, 0x180);
		if (!ctx->dma_desc_obj)
			return -ENOMEM;

		ctx->vb = vb;
		ctx->state = BUF_ALLOC;

		for(i = 0; i < dev_priv->fmt.planes; i++) {
		  sgtable = vb2_dma_sg_plane_desc(vb, i);
		  ctx->plane[i] = iommu_allocate_sgtable(dev_priv, sgtable);
		  if(!ctx->plane[i])
			  return -ENOMEM;
		}
	}

	vb2_set_plane_payload(vb, 0, dev_priv->fmt.fmt.sizeimage);

	dma_list = &ctx->dma_desc_list;
	memset(dma_list, 0, 0x180);

	dma_list->field0 = 1;
	dma_list->count = 1;
	dma_list->desc[0].count = 1;
	dma_list->desc[0].pool = 0x02;
	dma_list->desc[0].addr0 = (ctx->plane[0]->offset << 12) | 0xc0000000;

	if (dev_priv->fmt.planes >= 2)
		dma_list->desc[0].addr1 = (ctx->plane[1]->offset << 12) | 0xc0000000;
	if (dev_priv->fmt.planes >= 3)
		dma_list->desc[0].addr2 = (ctx->plane[2]->offset << 12) | 0xc0000000;

	dma_list->desc[0].tag = (u64)ctx;
	init_waitqueue_head(&ctx->wq);
	return 0;
}
Esempio n. 5
0
static void buffer_finish(struct vb2_buffer *vb)
{
	struct cx23885_dev *dev = vb->vb2_queue->drv_priv;
	struct cx23885_buffer *buf = container_of(vb,
		struct cx23885_buffer, vb);
	struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);

	cx23885_free_buffer(vb->vb2_queue->drv_priv, buf);

	dma_unmap_sg(&dev->pci->dev, sgt->sgl, sgt->nents, DMA_FROM_DEVICE);
}
Esempio n. 6
0
static int buffer_prepare(struct vb2_buffer *vb)
{
	struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
	struct cx88_buffer *buf = container_of(vb, struct cx88_buffer, vb);
	struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
	unsigned int lines;
	unsigned int size;

	if (dev->core->tvnorm & V4L2_STD_525_60)
		lines = VBI_LINE_NTSC_COUNT;
	else
		lines = VBI_LINE_PAL_COUNT;
	size = lines * VBI_LINE_LENGTH * 2;
	if (vb2_plane_size(vb, 0) < size)
		return -EINVAL;
	vb2_set_plane_payload(vb, 0, size);

	cx88_risc_buffer(dev->pci, &buf->risc, sgt->sgl,
			 0, VBI_LINE_LENGTH * lines,
			 VBI_LINE_LENGTH, 0,
			 lines);
	return 0;
}