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Message-ID: <02592b09-8ab5-42ab-bd6b-6db79722d708@freebox.fr>
Date: Mon, 6 May 2024 12:39:29 +0200
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Subject: Re: [PATCH v3 3/3] arm64: dts: qcom: msm8998: set
 qcom,no-msa-ready-indicator for wifi
From: Marc Gonzalez <mgonzalez@freebox.fr>
To: Bjorn Andersson <andersson@kernel.org>, Kalle Valo <kvalo@kernel.org>,
 Jeff Johnson <quic_jjohnson@quicinc.com>, ath10k <ath10k@lists.infradead.org>
Cc: wireless <linux-wireless@vger.kernel.org>, DT
 <devicetree@vger.kernel.org>, MSM <linux-arm-msm@vger.kernel.org>,
 Rob Herring <robh+dt@kernel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Conor Dooley <conor+dt@kernel.org>,
 Pierre-Hugues Husson <phhusson@freebox.fr>, Arnaud Vrac <avrac@freebox.fr>,
 Konrad Dybcio <konrad.dybcio@linaro.org>,
 Jami Kettunen <jamipkettunen@gmail.com>,
 Jeffrey Hugo <quic_jhugo@quicinc.com>,
 Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
 Alexey Minnekhanov <alexeymin@postmarketos.org>
References: <ebbda69c-63c1-4003-bf97-c3adf3ccb9e3@freebox.fr>
 <0914f96e-fcfd-4088-924a-fc1991bce75f@freebox.fr>
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On 29/04/2024 16:07, Marc Gonzalez wrote:

> The ath10k driver waits for an "MSA_READY" indicator
> to complete initialization. If the indicator is not
> received, then the device remains unusable.
> 
> cf. ath10k_qmi_driver_event_work()
> 
> Several msm8998-based devices are affected by this issue.
> Oddly, it seems safe to NOT wait for the indicator, and
> proceed immediately when QMI_EVENT_SERVER_ARRIVE.
> 
> Jeff Johnson wrote:
> 
>   The feedback I received was "it might be ok to change all ath10k qmi
>   to skip waiting for msa_ready", and it was pointed out that ath11k
>   (and ath12k) do not wait for it.
> 
>   However with so many deployed devices, "might be ok" isn't a strong
>   argument for changing the default behavior.
> 
> cf. also
> https://wiki.postmarketos.org/wiki/Qualcomm_Snapdragon_835_(MSM8998)#WLAN
> 
> Signed-off-by: Marc Gonzalez <mgonzalez@freebox.fr>
> ---
>  arch/arm64/boot/dts/qcom/msm8998.dtsi | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8998.dtsi b/arch/arm64/boot/dts/qcom/msm8998.dtsi
> index 67b8374ddf02f..4e6245095adfc 100644
> --- a/arch/arm64/boot/dts/qcom/msm8998.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8998.dtsi
> @@ -3234,6 +3234,7 @@ wifi: wifi@18800000 {
>  			iommus = <&anoc2_smmu 0x1900>,
>  				 <&anoc2_smmu 0x1901>;
>  			qcom,snoc-host-cap-8bit-quirk;
> +			qcom,no-msa-ready-indicator;
>  		};
>  	};
>  };


Bjorn,

This patch is supposed to go through your tree, right?

Regards