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authorMauro Carvalho Chehab <mchehab@brturbo.com.br>2005-06-23 22:04:50 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-24 00:06:37 -0700
commit59dcd9480d93aebdf41e29c46e6a8b4ceeaca75d (patch)
treeff7a643f6ed0c2cc92355684c12b63231387afd6 /drivers
parentf246a8172a9e403b78c34568f766990f1506a0ab (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.c9
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;
}