unsigned long saa7134_buffer_base(struct saa7134_buf *buf)
{
unsigned long base;
base = saa7134_buffer_startpage(buf) * 4096;
base += buf->vb.dma.sglist[0].offset;
return base;
}
unsigned long saa7134_buffer_base(struct saa7134_buf *buf)
{
unsigned long base;
struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
base = saa7134_buffer_startpage(buf) * 4096;
base += dma->sglist[0].offset;
return base;
}
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;
}
static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct saa7134_dev *dev = q->priv_data;
struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
unsigned int lines, llength, size;
int err;
dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]);
llength = TS_PACKET_SIZE;
lines = dev->ts.nr_packets;
size = lines * llength;
if (0 != buf->vb.baddr && buf->vb.bsize < size)
return -EINVAL;
if (buf->vb.size != size) {
saa7134_dma_free(q,buf);
}
if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
dprintk("buffer_prepare: needs_init\n");
buf->vb.width = llength;
buf->vb.height = lines;
buf->vb.size = size;
buf->pt = &dev->ts.pt_ts;
err = videobuf_iolock(q,&buf->vb,NULL);
if (err)
goto oops;
err = saa7134_pgtable_build(dev->pci,buf->pt,
dma->sglist,
dma->sglen,
saa7134_buffer_startpage(buf));
if (err)
goto oops;
}
buf->vb.state = VIDEOBUF_PREPARED;
buf->activate = buffer_activate;
buf->vb.field = field;
return 0;
oops:
saa7134_dma_free(q,buf);
return err;
}
