netdev - Re: [PATCH] ath10k: qmi: Skip host capability request for Xiaomi Poco F1

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Message-ID: <87d02bnnll.fsf@codeaurora.org>
Date:   Thu, 24 Sep 2020 19:31:02 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Amit Pundir <amit.pundir@...aro.org>
Cc:     David S Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Jeffrey Hugo <jeffrey.l.hugo@...il.com>,
        netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
        Konrad Dybcio <konradybcio@...il.com>,
        ath10k@...ts.infradead.org, lkml <linux-kernel@...r.kernel.org>,
        John Stultz <john.stultz@...aro.org>,
        Sumit Semwal <sumit.semwal@...aro.org>
Subject: Re: [PATCH] ath10k: qmi: Skip host capability request for Xiaomi Poco F1

Amit Pundir <amit.pundir@...aro.org> writes:

> Workaround to get WiFi working on Xiaomi Poco F1 (sdm845)
> phone. We get a non-fatal QMI_ERR_MALFORMED_MSG_V01 error
> message in ath10k_qmi_host_cap_send_sync(), but we can still
> bring up WiFi services successfully on AOSP if we ignore it.
>
> We suspect either the host cap is not implemented or there
> may be firmware specific issues. Firmware version is
> QC_IMAGE_VERSION_STRING=WLAN.HL.2.0.c3-00257-QCAHLSWMTPLZ-1
>
> qcom,snoc-host-cap-8bit-quirk didn't help. If I use this
> quirk, then the host capability request does get accepted,
> but we run into fatal "msa info req rejected" error and
> WiFi interface doesn't come up.
>
> Attempts are being made to debug the failure reasons but no
> luck so far. Hence this device specific workaround instead
> of checking for QMI_ERR_MALFORMED_MSG_V01 error message.
> Tried ath10k/WCN3990/hw1.0/wlanmdsp.mbn from the upstream
> linux-firmware project but it didn't help and neither did
> building board-2.bin file from stock bdwlan* files.
>
> This workaround will be removed once we have a viable fix.
> Thanks to postmarketOS guys for catching this.
>
> Signed-off-by: Amit Pundir <amit.pundir@...aro.org>

Bjorn, is this ok to take?

> --- a/drivers/net/wireless/ath/ath10k/qmi.c
> +++ b/drivers/net/wireless/ath/ath10k/qmi.c
> @@ -651,7 +651,8 @@ static int ath10k_qmi_host_cap_send_sync(struct ath10k_qmi *qmi)
>  
>  	/* older FW didn't support this request, which is not fatal */
>  	if (resp.resp.result != QMI_RESULT_SUCCESS_V01 &&
> -	    resp.resp.error != QMI_ERR_NOT_SUPPORTED_V01) {
> +	    resp.resp.error != QMI_ERR_NOT_SUPPORTED_V01 &&
> +	    !of_machine_is_compatible("xiaomi,beryllium")) { /* Xiaomi Poco F1 workaround */
>  		ath10k_err(ar, "host capability request rejected: %d\n", resp.resp.error);

ath10k-check complained about a too long line, so in the pending branch
I moved the comment before the if statement.

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