[alsa-devel] [PATCH] ASoC: Add Jassi Brar as Samsung maintainer

Jassi Brar jassisinghbrar at gmail.com
Mon Sep 27 04:23:55 CEST 2010

On Sun, Sep 26, 2010 at 7:49 PM, Kyungmin Park <kmpark at infradead.org> 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.


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