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platform_kernel-5.15
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[media] cx88: fix VBI support 

Now works with both NTSC and PAL. Tested with CC/XDS for NTSC and
teletext/WSS for PAL. The start lines were wrong, the WSS signal
wasn't captured and there was no difference between NTSC and PAL
w.r.t. the count[] values so NTSC returned way too many lines.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2014-09-20 09:24:58 -03:00 committed by Mauro Carvalho Chehab
parent 98822de9ae
commit c0d5b5fbbe
2 changed files with 22 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/media/pci/cx88/cx88-vbi.c
View File

@ -23,20 +23,22 @@ int cx8800_vbi_fmt (struct file *file, void *priv,
f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
f->fmt.vbi.offset = 244;
f->fmt.vbi.count[0] = VBI_LINE_COUNT;
f->fmt.vbi.count[1] = VBI_LINE_COUNT;
if (dev->core->tvnorm & V4L2_STD_525_60) {
/* ntsc */
f->fmt.vbi.sampling_rate = 28636363;
f->fmt.vbi.start[0] = 10;
f->fmt.vbi.start[1] = 273;
f->fmt.vbi.count[0] = VBI_LINE_NTSC_COUNT;
f->fmt.vbi.count[1] = VBI_LINE_NTSC_COUNT;
} else if (dev->core->tvnorm & V4L2_STD_625_50) {
/* pal */
f->fmt.vbi.sampling_rate = 35468950;
f->fmt.vbi.start[0] = 7 -1;
f->fmt.vbi.start[1] = 319 -1;
f->fmt.vbi.start[0] = V4L2_VBI_ITU_625_F1_START + 5;
f->fmt.vbi.start[1] = V4L2_VBI_ITU_625_F2_START + 5;
f->fmt.vbi.count[0] = VBI_LINE_PAL_COUNT;
f->fmt.vbi.count[1] = VBI_LINE_PAL_COUNT;
}
return 0;
}
@ -111,8 +113,13 @@ static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
struct cx8800_dev *dev = q->drv_priv;
*num_planes = 1;
sizes[0] = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
if (dev->core->tvnorm & V4L2_STD_525_60)
sizes[0] = VBI_LINE_NTSC_COUNT * VBI_LINE_LENGTH * 2;
else
sizes[0] = VBI_LINE_PAL_COUNT * VBI_LINE_LENGTH * 2;
return 0;
}
@ -122,10 +129,15 @@ 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;
int rc;
size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
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);
@ -135,9 +147,9 @@ static int buffer_prepare(struct vb2_buffer *vb)
return -EIO;
cx88_risc_buffer(dev->pci, &buf->risc, sgt->sgl,
0, VBI_LINE_LENGTH * VBI_LINE_COUNT,
0, VBI_LINE_LENGTH * lines,
VBI_LINE_LENGTH, 0,
VBI_LINE_COUNT);
lines);
return 0;
}

3
drivers/media/pci/cx88/cx88.h
View File

@ -61,7 +61,8 @@
#define FORMAT_FLAGS_PACKED 0x01
#define FORMAT_FLAGS_PLANAR 0x02
#define VBI_LINE_COUNT 17
#define VBI_LINE_PAL_COUNT 18
#define VBI_LINE_NTSC_COUNT 12
#define VBI_LINE_LENGTH 2048
#define AUD_RDS_LINES 4