Re: [PATCH] arm64: dts: qcom: x1-denali: Fix microphone distortion

[Abel Vesa]

On 26-08-30 18:40:07, Dale Whinham wrote:
> The microphones (2x) on Surface Pro 11 are currently ususable due to a
> misconfigured sample rate, which results in a very distorted recording
> with the voice barely audible.
> 
> Under Windows, the DMIC0_CTL register is set to 0x00000005 while
> recording:
> 
>    bit 0 = 1 --> DMIC0 enabled
> bits 3:1 = 2 --> DMIC clock divider = /4
> 
> The current dmic-sample-rate of 4800000 corresponds to the default DMIC
> clock divider of /2.
> 
> Dropping dmic-sample-rate to 2400000 sets the divider to /4, matching
> the working Windows configuration and resulting in perfect audio.
> 
> While we're at it, remove the reference to dmic23_default, as we only
> have two microphones and don't need to configure the pins for a 3rd/4th
> microphone.
> 
> Signed-off-by: Dale Whinham <daleyo@xxxxxxxxx>

Reviewed-by: Abel Vesa <abel.vesa@xxxxxxxxxxxxxxxx>