[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>

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 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;
 }