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authorHans Verkuil <hverkuil@xs4all.nl>2006-04-02 12:50:42 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2006-06-25 01:57:36 -0300
commitb7f8292c96463810edfecff70dd4631d47e5a36b (patch)
tree02b1cfb3f753ea82c6fa51c901420074875be355 /include/media/v4l2-common.h
parent2eb606db1134ce860cc0cbf8b533b6315d182e21 (diff)
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V4L/DVB (3711): Add support for VIDIOC_INT_S_CRYSTAL_FREQ internal command.
Some saa7115-based cards use a different crystal frequency and a different audio clock generation. Add a new VIDIOC_INT_S_CRYSTAL_FREQ command to be able to set these values. Also change the default APLL setting to 0. It makes no sense to have the audio clock independent from the video clock, this can lead to audio/video synchronization problems. Setting this to 0 is also consistent with the old saa7114.c source and the way the Hauppauge Windows driver sets it. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'include/media/v4l2-common.h')
-rw-r--r--include/media/v4l2-common.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 642520a..827f7ed 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -211,4 +211,15 @@ struct v4l2_routing {
#define VIDIOC_INT_S_VIDEO_ROUTING _IOW ('d', 111, struct v4l2_routing)
#define VIDIOC_INT_G_VIDEO_ROUTING _IOR ('d', 112, struct v4l2_routing)
+struct v4l2_crystal_freq {
+ u32 freq; /* frequency in Hz of the crystal */
+ u32 flags; /* device specific flags */
+};
+
+/* Sets the frequency of the crystal used to generate the clocks.
+ An extra flags field allows device specific configuration regarding
+ clock frequency dividers, etc. If not used, then set flags to 0.
+ If the frequency is not supported, then -EINVAL is returned. */
+#define VIDIOC_INT_S_CRYSTAL_FREQ _IOW ('d', 113, struct v4l2_crystal_freq)
+
#endif /* V4L2_COMMON_H_ */
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