At Tue, 28 Apr 2009 10:00:02 +0100, Mark Brown wrote: > > On Tue, Apr 28, 2009 at 08:08:06AM +0200, Takashi Iwai wrote: > > Mark Brown wrote: > > > > On Mon, Apr 27, 2009 at 05:09:27PM +0200, Jaroslav Kysela wrote: > > > > > Appearently, FIFO is too big. I'm working on some changes to take account > > > > Could you expand a bit on what qualifies as "too big" here? I've not > > > been following the thread here or the changes that caused problems. > > > It's bigger than the pre-defined tolerance of jiffies check in PCM > > core code. > > Hrm, OK. That may create problems for some embedded systems which can > use very large FIFOs (well, FIFO equivalents) to allow the processor to > go to sleep when doing things like MP3 playback. I don't think any of > those have audio support in mainline yet, though. > > > The new PCM core checks the returned hw_ptr together with jiffies > > delta whether it's a sane value. When FIFO is used with the ring > > buffer, the hardware tends to report back earlier before the expected > > timing. > > But (from other messages in the thread) it's possible to disable these > checks if required? That's being discussed now :) Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
