[pvrusb2] New driver snapshot: pvrusb2-mci-20060625

[Hans Verkuil]

On Wednesday 28 June 2006 03:18, Mike Isely wrote:
> On Wed, 28 Jun 2006, xavier.gnata at free.fr wrote:
> > Hi,
> >
> > *great* news. I gonna to compile a 2.6.18 git or rc1 as soon as
> > possbile :) Very good job (but I have no time to test in during
> > hours :( ;))
> >
> > one point : xawtv4 is not dead because kernel merging implies sys
> > interface drop (correct me if needed). So, xawtv is the only
> > project able to take avantage of
>
> Why would kernel merging rules result in dropping the sysfs
> interface? My understanding is that the kernel developers want to
> eventually kill ioctl() (and certainly discourage any further
> extensions using it) and that the more explicit, compatible, and
> self-documenting means of using sysfs was supposed to be its
> replacement.  Maybe I misread this.  I've been misreading a lot
> lately :-(

It's certainly discouraged, but there often is no alternative. sysfs 
cannot completely replace ioctl (for example: setting MPEG encoder 
controls require atomicity where multiple controls are set at the same 
time, something not possible with sysfs AFAIK). The new webcam 
resolution/frame rate functions being proposed also use ioctl.

	Hans

>
> > pvrusb2. Ok, mythtv is great but mythtv is not done to watch tv in
> > a small windows left-top-corner of the screen. GNU/Linux really
> > needs a modern and fully V4L2 TV apps (tvtime is a great when you
> > do not deal with mepg2).
>
> MythTV should in theory not need any tweaks via sysfs in order to
> work. Sure there are sysfs things one might want to do to improve
> matters, but nothing required.  By the way, this new driver snapshot
> should correctly honor requested video resolution from the V4L2 app
> now.  So...  If you say "640x480" in MythTV then that's what you
> should get.  I have not tested this however.  Anyone want to try it?
>
> > Ok, I'm on the wrong list ;)
> >
> :-)
>
> Rumor has it that ivtv will appear in kernel 2.6.19, but don't quote
> me on that :-)
>
>    -Mike