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Subject: Re: [PATCH v3 1/3] dt-bindings: net: wireless: ath10k: add
 qcom,no-msa-ready-indicator prop
From: Kalle Valo <kvalo@kernel.org>
In-Reply-To: <54ac2295-36b4-49fc-9583-a10db8d9d5d6@freebox.fr>
References: <54ac2295-36b4-49fc-9583-a10db8d9d5d6@freebox.fr>
To: Marc Gonzalez <mgonzalez@freebox.fr>
Cc: Jeff Johnson <quic_jjohnson@quicinc.com>,
 ath10k <ath10k@lists.infradead.org>,
 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>,
 Bjorn Andersson <andersson@kernel.org>,
 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>
User-Agent: pwcli/0.1.1-git (https://github.com/kvalo/pwcli/) Python/3.11.2
Message-ID: <171560975908.1690511.498631481702370762.kvalo@kernel.org>
Date: Mon, 13 May 2024 14:16:00 +0000 (UTC)

Marc Gonzalez <mgonzalez@freebox.fr> 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.
> 
> Kalle Valo first suggested setting a bit in firmware-5.bin to trigger
> work-around in the driver. However, firmware-5.bin is parsed too late.
> So we are stuck with a DT property.
> 
> Signed-off-by: Marc Gonzalez <mgonzalez@freebox.fr>
> Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
> Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
> Acked-by: Rob Herring (Arm) <robh@kernel.org>
> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>

2 patches applied to ath-next branch of ath.git, thanks.

71b6e321e302 dt-bindings: net: wireless: ath10k: add qcom,no-msa-ready-indicator prop
6d67d18014a8 wifi: ath10k: do not always wait for MSA_READY indicator

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/54ac2295-36b4-49fc-9583-a10db8d9d5d6@freebox.fr/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches