From c7c1d5a5dea80d908fa9a7945424d872b3588757 Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Sat, 10 Oct 2015 13:51:09 -0300 Subject: [media] DocBook: add SDR specific info to G_MODULATOR / S_MODULATOR Add SDR specific notes to G_MODULATOR / S_MODULATOR documentation. Signed-off-by: Antti Palosaari [hans.verkuil@cisco.com: add quotes in "The term 'modulator'"] Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- Documentation/DocBook/media/v4l/vidioc-g-modulator.xml | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'Documentation/DocBook') diff --git a/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml b/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml index 80167fc4483d..96e17b344c5d 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml @@ -78,6 +78,12 @@ different audio modulation if the request cannot be satisfied. However this is a write-only ioctl, it does not return the actual audio modulation selected. + SDR specific modulator types are +V4L2_TUNER_SDR and V4L2_TUNER_RF. +For SDR devices txsubchans field must be +initialized to zero. +The term 'modulator' means SDR transmitter in this context. + To change the radio frequency the &VIDIOC-S-FREQUENCY; ioctl is available. -- cgit v1.2.3