Re: How to acces TVP5150 .command function from userspace
Markus Rechberger <[email protected]>
| Newsgroups | gmane.comp.video.video4linux |
|---|---|
| Message-ID | <[email protected]> |
2009/5/22 Devin Heitmueller <[email protected]>: > On Fri, May 22, 2009 at 3:50 AM, <[email protected]> wrote: >> Hi, >> >> I am working with a video capture chip TVP5150. I want to adjust the >> "Brightness" "Contrast" "Saturation" and "hue" in user space. >> In TVP5150 drivers ,the V4l2 commands are in function tvp5150_command.And >> this function is a member of struct i2c_device. >> >> The linux is 2.6.19.2. >> I write my code according kernel document Documentation/i2c/dev-interface >> But I can`t access tvp5150_command. >> How can i acces i2c_device .command function from user space? > > I thought those controls were already implemented in the tvp5150 > driver, although I could be mistaken (I would have to look at the > code). If not, it would probably be much easier to just add the > commands to the driver than to attempt to program the chip from > userland (the datasheet for the tvp5150 is freely available). > those are definitely implemented, I remember there was a problem with a too dark videopicture years ago and it was a bug in the tvp5150... Also by looking at it: V4L2_CID_BRIGHTNESS V4L2_CID_CONTRAST V4L2_CID_SATURATION V4L2_CID_HUE are supported. Markus -- video4linux-list mailing list Unsubscribe mailto:[email protected]?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list