linux-kernel - Re: [PATCH v3] firmware: qcom_scm: Clear download bit during reboot

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Message-ID: <70e6cc10-4300-e9c2-daea-ae5b09923d30@quicinc.com>
Date:   Wed, 1 Nov 2023 16:11:53 +0530
From:   Mukesh Ojha <quic_mojha@...cinc.com>
To:     Robert Marko <robimarko@...il.com>,
        Sricharan Ramabadhran <quic_srichara@...cinc.com>
CC:     <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] firmware: qcom_scm: Clear download bit during reboot

+@...charan

On 11/1/2023 3:21 PM, Robert Marko wrote:
> On Thu, 26 Oct 2023 at 17:16, Mukesh Ojha <quic_mojha@...cinc.com> wrote:
>>
>> Hey Robert,
>>
>> Just remembered this thread again,
>>
>> is this issue got fixed with
>>
>> https://lore.kernel.org/lkml/20230816164641.3371878-1-robimarko@gmail.com/
> 
> Sadly no, as this issue is affecting all IPQ4019 boards and not just
> the ones that have SDI enabled.

unless, enabling CONFIG_QCOM_SCM_DOWNLOAD_MODE_DEFAULT has problem in 
your SoC, i don't think why current patch can cause issue in your
board.

Can you please help with some debug as i don't have this target but
interested in fixing this issue if it is indeed due to kernel.

whether, CONFIG_QCOM_SCM_DOWNLOAD_MODE_DEFAULT works on your target 
basically if qcom_scm_set_download_mode(true); return success and
reboot works with that.

Or may be only writing qcom_scm_set_download_mode(false); has some
unknown affect in the firmware and later causing a problem in reboot.

-Mukesh