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

[Chen-Yu Tsai]

On Mon, Sep 28, 2015 at 3:42 PM, Maxime Ripard
<maxime.ripard at free-electrons.com> 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.
>
> Do you have another A10 board with a simpler audio setup, like a
> cubieboard?
>
>> 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