> select() will initiate a new frame capture as a side effect if there is
> no (good) data ready. Otherwise it will sleep forever.
So for a dumb interface select() would effectively be 'wait for a vblank'
and read non block would return one frame then -EWOULDBLOCK until the vblank ?
> > A related problem: The API document allows drivers to refuse read()
> > calls with sizes smaller than a full frame ("a partial frame may be
> > [ ... ] impractical or inefficient to implement"). Which doesn't
> > make sense to me, assuming we require the drivers to support
>
> Hmmm. Maybe you're right. Am I giving too much discretion to the driver
> writer?
I'd rather we allowed partial reads, but Im not sure how hard it impacts the
drivers which are DMA based - I guess this is one for folks like Gerd Knorr
Alan
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