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| author | Hans Verkuil <devnull@localhost> | 2005-12-29 17:49:47 +0000 |
|---|---|---|
| committer | Hans Verkuil <devnull@localhost> | 2005-12-29 17:49:47 +0000 |
| commit | 27e2b95a26c4420606c083db5fc52d1d7ea30401 (patch) | |
| tree | c42a26b5e6a77446806b0ea46ec5396ef40930b9 | |
| parent | 91795dc6bc0fd7be21f071d15026c74ebd396794 (diff) | |
| download | mediapointer-dvb-s2-27e2b95a26c4420606c083db5fc52d1d7ea30401.tar.gz mediapointer-dvb-s2-27e2b95a26c4420606c083db5fc52d1d7ea30401.tar.bz2 | |
Don't reprogram the video standard if it is unchanged.
Don't reprogram the video standard if the new standard
equals the old standard.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
| -rw-r--r-- | linux/drivers/media/video/saa7115.c | 10 | ||||
| -rw-r--r-- | v4l/ChangeLog | 8 |
2 files changed, 18 insertions, 0 deletions
diff --git a/linux/drivers/media/video/saa7115.c b/linux/drivers/media/video/saa7115.c index c4e203715..c06997b00 100644 --- a/linux/drivers/media/video/saa7115.c +++ b/linux/drivers/media/video/saa7115.c @@ -678,6 +678,16 @@ static void saa7115_set_v4lstd(struct i2c_client *client, v4l2_std_id std) struct saa7115_state *state = i2c_get_clientdata(client); int taskb = saa7115_read(client, 0x80) & 0x10; + /* Prevent unnecessary standard changes. During a standard + change the I-Port is temporarily disabled. Any devices + reading from that port can get confused. + Note that VIDIOC_S_STD is also used to switch from + radio to TV mode, so if a VIDIOC_S_STD is broadcast to + all I2C devices then you do not want to have an unwanted + side-effect here. */ + if (std == state->std) + return; + // This works for NTSC-M, SECAM-L and the 50Hz PAL variants. if (std & V4L2_STD_525_60) { saa7115_dbg("decoder set standard 60 Hz\n"); diff --git a/v4l/ChangeLog b/v4l/ChangeLog index d4106e55c..884a712da 100644 --- a/v4l/ChangeLog +++ b/v4l/ChangeLog @@ -1,3 +1,11 @@ +2005-12-29 17:47 hverkuil + + * linux/drivers/media/video/saa7115.c: (saa7115_set_v4lstd): + - Don't reprogram the video standard if the new standard + equals the old standard. + + Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> + 2005-12-28 19:56 hverkuil * linux/drivers/media/video/tvaudio.c: (chip_thread), |