From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Dale Whinham <daleyo@gmail.com>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: x1-denali: Fix microphone distortion
Date: Mon, 31 Aug 2026 10:32:32 +0200 [thread overview]
Message-ID: <2cd6b5e9-d442-4815-9a00-38d4d7324467@oss.qualcomm.com> (raw)
In-Reply-To: <20260830-surface-pro-11-mic-fix-v1-1-36a53140373b@gmail.com>
On 8/30/26 7:40 PM, 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@gmail.com>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Konrad
next prev parent reply other threads:[~2026-08-31 8:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-30 17:40 [PATCH] arm64: dts: qcom: x1-denali: Fix microphone distortion Dale Whinham
2026-08-31 8:32 ` Konrad Dybcio [this message]
2026-08-31 8:35 ` Abel Vesa
2026-08-31 17:53 ` Bjorn Andersson
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