On 01/11/05, Ville Syrjälä <[EMAIL PROTECTED]> wrote:

> And here's version 3 of the triple buffering/field parity ioctl thing.

I've just had a bash at implementing something similar for the
unichrome overlay layer, with some success.

The same structure is appropriate in that case too so it would be nice
to give the ioctl a more generic name (FBIO_FLIPONVSYNC?) and an
number in the 'F' range (0x21?).

What's causing me trouble at the moment is the fact that I've only got
a VBLANK interrupt to work with and the VBLANK-VSYNC interval is too
short to guarantee I can get the new buffer set up in time.  When the
machine is heavily loaded, it can miss and that gives a repeated
field.

Anyone got any bright ideas on this?

Mark

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