On Sun, Sep 26, 2010 at 7:49 PM, Kyungmin Park <kmpark@xxxxxxxxxxxxx> wrote: >>> Good news, >>> >>> At the first work, can you proceed the directory name change from >>> s3c24xx to samsung? >>> >>> it's really misleading and confusing to others. >> I am currently working on overhauling the Samsung ASoC support (AC97, >> PCM, DMA rename and I2S redesign). >> Hopefully patches will be ready within few days. > > Also please consider the power consumption issues. Lower Power (LP) > and runtime PM. > In the previous time it's handled by multimedia team (user level) but > they can't control it well. > In rough idea, it creates the some interface and just toggle it either > LP and normal. > As you know Lower Power Audio is one of big issues at power consumption. The Secondary fifo(overlay stereo channel) of I2Sv5 can receive data from a dedicated h/w buffer via dedicated audio-internal DMA as well as from system memory via system DMA(ex PL330). LPAM(power saving by using iDMA and iBuff while system is in deep-idle mode) is just one use of the overlay channel. Please remember that some other user might use it purely for h/w mixing in normal-power mode while using system RAM and DMA. So, ATM, I am against putting any power-mode detection mechanism into audio drivers. IMO, it's the responsibility of user-space to setup routes/modes to serve it's purpose. Anyways, I am open to suggestions. Mr Choi may ping me anytime. Thanks. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
