linux-kernel - Re: [PATCH v2 2/6] phy: qcom-qmp-ufs: Add PHY Configuration support for sm8750

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Message-ID: <1526d8a4-9606-4fb3-bb86-79bd8eb8a789@linaro.org>
Date: Mon, 24 Mar 2025 19:10:17 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Melody Olvera <quic_molvera@...cinc.com>, Vinod Koul <vkoul@...nel.org>,
 Kishon Vijay Abraham I <kishon@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>,
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
 Alim Akhtar <alim.akhtar@...sung.com>, Avri Altman <avri.altman@....com>,
 Bart Van Assche <bvanassche@....org>, Bjorn Andersson
 <andersson@...nel.org>, Andy Gross <agross@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>,
 Satya Durga Srinivasu Prabhala <quic_satyap@...cinc.com>,
 Trilok Soni <quic_tsoni@...cinc.com>
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-scsi@...r.kernel.org, Nitin Rawat <quic_nitirawa@...cinc.com>,
 Manish Pandey <quic_mapa@...cinc.com>,
 Linux regressions mailing list <regressions@...ts.linux.dev>
Subject: Re: [PATCH v2 2/6] phy: qcom-qmp-ufs: Add PHY Configuration support
 for sm8750

Hi,

On 10/03/2025 22:12, Melody Olvera wrote:
> From: Nitin Rawat <quic_nitirawa@...cinc.com>
> 
> Add SM8750 specific register layout and table configs. The serdes
> TX RX register offset has changed for SM8750 and hence keep UFS
> specific serdes offsets in a dedicated header file.
> 
> Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
> Co-developed-by: Manish Pandey <quic_mapa@...cinc.com>
> Signed-off-by: Manish Pandey <quic_mapa@...cinc.com>
> Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
> ---
>   drivers/phy/qualcomm/phy-qcom-qmp-qserdes-com-v6.h |   7 +
>   .../qualcomm/phy-qcom-qmp-qserdes-txrx-ufs-v7.h    |  67 ++++++++
>   drivers/phy/qualcomm/phy-qcom-qmp-ufs.c            | 180 ++++++++++++++++++++-
>   3 files changed, 246 insertions(+), 8 deletions(-)
> 

<snip>

This change breaks UFS on the SM8550-HDK:

[    7.418161] qcom-qmp-ufs-phy 1d80000.phy: phy initialization timed-out
[    7.427021] phy phy-1d80000.phy.0: phy poweron failed --> -110
[    7.493514] ufshcd-qcom 1d84000.ufshc: Enabling the controller failed
...

GIT bisect points to:
b02cc9a176793b207e959701af1ec26222093b05 is the first bad commit
Author: Nitin Rawat <quic_nitirawa@...cinc.com>
Date:   Mon Mar 10 14:12:30 2025 -0700

     phy: qcom-qmp-ufs: Add PHY Configuration support for sm8750

bisect log:
git bisect start 'ff7f9b199e3f' 'v6.14-rc1'
git bisect good 36c18c562846300d4e59f1a65008800b787f4fe4
git bisect good 85cf0293c3a75726e7bc54d3efdc5dc783debc07
git bisect good b2cd73e18cec75f917d14b9188f82a2fdef64ebe
git bisect bad b247639d33ad16ea76797268fd0eef08d8027dfd
git bisect good 9b3f2dfdad1cc0ab90a0fa371c8cbee08b2446e3
git bisect bad 8dc30c3e4cf8c4e370cf08bd09eb87b0deccd3de
git bisect bad 100aeb03a437f30300894091627e4406605ee3cb
git bisect bad b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b
git bisect good 8f831f272b4c89aa13b45bd010c2c18ad97a3f1b
git bisect good e45cc62c23428eefbae18a9b4d88d10749741bdd
git bisect bad ebf198f17b5ac967db6256f4083bbcbdcc2a3100
git bisect good 12185bc38f7667b1d895b2165a8a47335a4cf31b
git bisect bad e46e59b77a9e6f322ef1ad08a8874211f389cf47
git bisect bad b02cc9a176793b207e959701af1ec26222093b05

CI run: https://git.codelinaro.org/linaro/qcomlt/ci/staging/cdba-tester/-/jobs/229880#L1281

#regzbot introduced: b02cc9a17679

Neil