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

On Mon, Sep 28, 2015 at 3:42 PM, Maxime Ripard
[off-list ref] wrote:

Hi Priit,

On Tue, Sep 22, 2015 at 04:26:57PM +0300, Priit Laes wrote:

quoted

On Sat, 2015-09-12 at 15:26 +0200, Maxime Ripard wrote:

quoted

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.

Do you have another A10 board with a simpler audio setup, like a
cubieboard?

quoted

And also following in dmesg:
sun4i-codec 1c22c00.codec: Codec <-> 1c22c00.codec mapping ok
sun4i-codec 1c22c00.codec: ASoC: no sink widget found for Headphone Jack
sun4i-codec 1c22c00.codec: ASoC: Failed to add route HP Left -> direct -> Headphone Jack
sun4i-codec 1c22c00.codec: ASoC: no sink widget found for Headphone Jack
sun4i-codec 1c22c00.codec: ASoC: Failed to add route HP Right -> direct -> Headphone Jack

That one is weird, I'll look into this.

This also appears on my Cubietruck, when using the dts patch from
Hans' sunxi-wip
branch, which is the same patch, albeit for a different dts file, as Priit.

The immediate culprit seems to be the routing property, though I'm not sure what
it should be set to, or what extra drivers might be needed.


Regards
ChenYu