linux-kernel - Re: [PATCH v5 0/3] arm64: dts: qcom: add dts for sa8540p-ride board

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Date:   Tue, 4 Oct 2022 10:50:12 -0500
From:   Andrew Halaney <ahalaney@...hat.com>
To:     Eric Chanudet <echanude@...hat.com>
Cc:     Brian Masney <bmasney@...hat.com>,
        Parikshit Pareek <quic_ppareek@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Shazad Hussain <quic_shazhuss@...cinc.com>,
        Johan Hovold <johan@...nel.org>
Subject: Re: [PATCH v5 0/3] arm64: dts: qcom: add dts for sa8540p-ride board

On Tue, Oct 04, 2022 at 09:28:16AM -0400, Eric Chanudet wrote:
> On Mon, Oct 03, 2022 at 01:31:52PM -0400, Brian Masney wrote:
> > Just for documentation purposes, to get linux-next-20220930 booting on
> > the QDrive3 with the upstream arm64 defconfig I had to apply the
> > following patches:
> > 
> > - arm64: dts: qcom: sc8280xp: fix UFS PHY serdes size
> >   https://lore.kernel.org/linux-arm-msm/20220915141601.18435-1-johan+linaro@kernel.org/
> > 
> >   Without this, the phy fails to probe due to the following error:
> > 
> >     qcom-qmp-ufs-phy 1d87000.phy: can't request region for resource [mem 0x01d87400-0x01d87507]
> >     qcom-qmp-ufs-phy 1d87000.phy: failed to create lane0 phy, -16
> >     qcom-qmp-ufs-phy: probe of 1d87000.phy failed with error -16
> > 
> > - This hack patch is still needed:
> >   disable has_address_auth_metacap and has_generic_auth
> >   https://github.com/andersson/kernel/commit/d46a4d05d5a17ff4447af08471edd78e194d48e5
> > 
> >   Without this, the boot hangs at:
> > 
> >     rcu: srcu_init: Setting srcu_struct sizes based on contention.
> >     arch_timer: cp15 and mmio timer(s) running at 19.20MHz (virt/virt).
> >     clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x46d987e47, max_idle_ns: 440795202767 ns
> >     sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 4398046511078ns
> > 
> > - My UFS clock patch is still needed:
> >   arm64: dts: qcom: sc8280xp: correct ref_aux clock for ufs_mem_phy
> >   https://lore.kernel.org/lkml/20220830180120.2082734-1-bmasney@redhat.com/T/#u
> > 
> > - I didn't use an initrd for testing so I had to change the options
> >   CONFIG_SCSI_UFS_QCOM and CONFIG_PHY_QCOM_QMP from =m to =y.
>  
> I followed the instructions above and linux-next-20220930 booted on the
> QDrive3 to a prompt. It then hanged after a couple minutes and rebooted
> in Sahara mode:
>     B -   1662280 - Sahara Init
>     B -   1665422 - Sahara Open
> 
> There seems to be no trace from the kernel, this happened consistently
> over 3 boots.
> 
> I asked Brian, he mentioned he only booted to prompt so that may have
> happened unbeknownst to him as well.

I took the upstream defconfig for a spin and see similar. My T-B was for
this defconfig (downstream one + make olddefconfig) which works ok for
me:

    https://gitlab.com/ahalaney/linux/-/commit/40f1b241117716ef4b0e27cf50054e749b8ff608

Thanks,
Andrew

> 
> -- 
> Eric Chanudet
>