List:       linux-video
Subject:    V4L2 in the kernel..
From:       "matthew.r.pavlovich.1" < mpav () purdue ! edu>
Date:       1999-03-05 5:46:29

I talked to Linus at the Expo (very briefly) about V4L2.  He said that we
needed to work on the handling of DMA's.  He said that some of the way
things were going to be handled were not up to par.  I didn't want to bug
him too much, and I didn't want to embarrass my inferior self  to
his programming genius, so I left it at that.  I guess that gives us
something to look at.  Maybe Alan Cox can give us some insight to exactly
how Linus likes things to be done.

DVD project plug: I got the TV-Out on the way, organizing a few
programmers to start preliminary work on the decoder card.  Still
accepting volunteers as always.  New site design is in the works. 
http://linuxdvd.dhs.org.  I am trying to coordinate all the DVD projects
to one place, so we can have better plublicity and we don't need to write
the same code 30 times over.

-Matt



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List:       linux-video
Subject:    Re: V4L2 in the kernel..
From:       Alan Cox <alan () cymru ! net>
Date:       1999-03-05 13:47:44

> I talked to Linus at the Expo (very briefly) about V4L2.  He said that we
> needed to work on the handling of DMA's.  He said that some of the way
> things were going to be handled were not up to par.  I didn't want to bug
> him too much, and I didn't want to embarrass my inferior self  to
> his programming genius, so I left it at that.  I guess that gives us
> something to look at.  Maybe Alan Cox can give us some insight to exactly
> how Linus likes things to be done.

I've absolutely no idea. V4L-2 doesnt even specify how DMA is handled.

Alan


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List:       linux-video
Subject:    Re: V4L2 in the kernel..
From:       Bill Dirks <dirks () rendition ! com>
Date:       1999-03-05 18:55:10

Yeah, DMA/bus-mastering is internal to drivers; the API only specifies a
way to map buffers in kernel and user space, and the movement of data
to/from the hardware is simply "magic" as far as the spec is concerned.

BTW, I will begin working on the v4l compatibility layer for V4L2 in the
next couple days.

Matthew, sorry I missed you at the show. I was there on Wednesday.
Didn't talk to Linus, though. :)

Bill.

Alan Cox wrote:
> 
> > I talked to Linus at the Expo (very briefly) about V4L2.  He said that we
> > needed to work on the handling of DMA's.  He said that some of the way
> > things were going to be handled were not up to par.  I didn't want to bug
> > him too much, and I didn't want to embarrass my inferior self  to
> > his programming genius, so I left it at that.  I guess that gives us
> > something to look at.  Maybe Alan Cox can give us some insight to exactly
> > how Linus likes things to be done.
> 
> I've absolutely no idea. V4L-2 doesnt even specify how DMA is handled.


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