diff options
| author | Mauro Carvalho Chehab <mchehab@brturbo.com.br> | 2005-06-23 22:04:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-24 00:06:37 -0700 |
| commit | 59dcd9480d93aebdf41e29c46e6a8b4ceeaca75d (patch) | |
| tree | ff7a643f6ed0c2cc92355684c12b63231387afd6 /drivers | |
| parent | f246a8172a9e403b78c34568f766990f1506a0ab (diff) | |
[PATCH] v4l: PAL-M support fix for CX88 chipsets
This patch fixes PAL-M chroma subcarrier frequency (FSC) to its correct
value of 3.5756115 MHz and adjusts horizontal total samples for PAL-M,
according with formula Line Draw Time / (4*FSC).
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Cc: <video4linux-list@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/cx88/cx88-core.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/media/video/cx88/cx88-core.c b/drivers/media/video/cx88/cx88-core.c index 1ff79b5a883..8c7f5589e92 100644 --- a/drivers/media/video/cx88/cx88-core.c +++ b/drivers/media/video/cx88/cx88-core.c @@ -736,6 +736,10 @@ static unsigned int inline norm_fsc8(struct cx88_tvnorm *norm) { static const unsigned int ntsc = 28636360; static const unsigned int pal = 35468950; + static const unsigned int palm = 28604892; + + if (norm->id & V4L2_STD_PAL_M) + return palm; return (norm->id & V4L2_STD_625_50) ? pal : ntsc; } @@ -749,6 +753,11 @@ static unsigned int inline norm_notchfilter(struct cx88_tvnorm *norm) static unsigned int inline norm_htotal(struct cx88_tvnorm *norm) { + /* Should always be Line Draw Time / (4*FSC) */ + + if (norm->id & V4L2_STD_PAL_M) + return 909; + return (norm->id & V4L2_STD_625_50) ? 1135 : 910; } |