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[PATCH] v4l: PAL-M support fix for CX88 chipsets

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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>
This commit is contained in:
Mauro Carvalho Chehab 2005-06-23 22:04:50 -07:00 committed by Linus Torvalds
parent f246a8172a
commit 59dcd9480d
1 changed files with 9 additions and 0 deletions
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9
drivers/media/video/cx88/cx88-core.c
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@ -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;
}