From 59dcd9480d93aebdf41e29c46e6a8b4ceeaca75d Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab <mchehab@brturbo.com.br> Date: Thu, 23 Jun 2005 22:04:50 -0700 Subject: [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> --- drivers/media/video/cx88/cx88-core.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/media/video') diff --git a/drivers/media/video/cx88/cx88-core.c b/drivers/media/video/cx88/cx88-core.c index 1ff79b5a8835..8c7f5589e92b 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; } -- cgit v1.2.2