Re: [linux-sunxi] [PATCH 0/2] ASoC: Add support for the Allwinner A10 codec

[Hans de Goede]

Hi,

On 09/28/2015 09:42 AM, Maxime Ripard wrote:
> Hi Priit,
>
> On Tue, Sep 22, 2015 at 04:26:57PM +0300, Priit Laes wrote:
> > On Sat, 2015-09-12 at 15:26 +0200, Maxime Ripard wrote:
> > > Hi everyone,
> > >
> > > This patch set adds the support for what Allwinner calls the codec on
> > > their SoCs.
> > >
> > > This codec is actually a combination of a codec and DAI, tied
> > > together
> > > in a single memory-mapped IP. It is completely standalone, and
> > > outputs
> > > directly the analog signal.
> > >
> > > While it supports both playback and capture, the capture is not
> > > implemented in this patch, and will be posted eventually as a
> > > separate
> > > one.
> > >
> > > This set, in order to be functional, has a dependency on the audio
> > > clocks patch set posted separately. However, it doesn't needs this to
> > > compile properly, so I guess it can be merged without really caring
> > > for the merging status of the clock patches.
> >
> > It works on Gemei G9 tablet which has also extra chip that
> > automatically switches output over from internal speakers to headphones
> > when connector is inserted.
> >
> > Now I noticed some weird things:
> >
> > When I have all the switches as ON in alsamixer, and I start disabling
> > them, I get following weird results.
> >
> > Left Mixer Left - LML
> > Right Mixer Left - LMR
> > Right Mixer Right - RMR
> >
> > Very faint output:
> > LML - ON
> > RML - Mute
> > RMR - ON
> >
> > Output works fully:
> > LML - Mute
> > RML - Mute
> > RMR - Mute
> >
> > When I Mute Pre-Amplifier and fiddle any of LML, RML or RMR, the output
> > stays mute even after setting Pre-Amplifier Mute back on:
> >
> > 1. All switches on
> > 2. Mute pre-amplifier
> > 3. Mute RMR
> > 4. Pre-Amilifier Mute Off
> > .. Music stays off
> > 5. Toggle Pre-Amplifier twice - output turns on
>
> Unfortunately, I don't have access to that SoC or that setup.

I'm seeing similar stuff on a cubieboard, both A10 and A20
based cubieboards, I have to fiddle a bit with the switches
to get things to work. At boot all switches are disabled.

On both A10 and A20 I need to enable to following for things to work:

unmute Pre-Amplifier DAC
unmute Pre-Amplifier Mute

I guess this is just a question if adding some mixer defaults to
the alsa userspace somewhere ?

Regards,

Hans
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/