[PATCH 5/8] ASoC: sun50i-codec-analog: Enable DAPM for headphone switch

[Samuel Holland]

On 2/17/20 1:17 AM, Chen-Yu Tsai wrote:
> On Mon, Feb 17, 2020 at 10:18 AM Samuel Holland <samuel at sholland.org> wrote:
>>
>> By including the headphone mute switch to the DAPM graph, both the
>> headphone amplifier and the Mixer/DAC inputs can be powered off when
>> the headphones are muted.
>>
>> The mute switch is between the source selection and the amplifier,
>> as per the diagram in the SoC manual.
>>
>> Signed-off-by: Samuel Holland <samuel at sholland.org>
> 
> Reviewed-by: Chen-Yu Tsai <wens at csie.org>
> 
> BTW, have you also considered tying in the headphone volume control?
> It also has a mute setting.

As far as I can tell, setting a volume control to its "mute" level has no effect
on the DAPM power state. So I didn't add PGA widgets for the volume controls on
either codec. I can add them if there's some benefit to doing so.

> ChenYu
> 

Regards,
Samuel