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Date:   Fri, 1 Dec 2023 11:09:44 +0100
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From:   neil.armstrong@linaro.org
Reply-To: neil.armstrong@linaro.org
Subject: Re: [PATCH v7 00/10] Enable HS-G5 support on SM8550
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To:     Can Guo <quic_cang@quicinc.com>, bvanassche@acm.org,
        mani@kernel.org, adrian.hunter@intel.com, vkoul@kernel.org,
        beanhuo@micron.com, avri.altman@wdc.com, junwoo80.lee@samsung.com,
        martin.petersen@oracle.com
Cc:     linux-scsi@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        Matthias Brugger <matthias.bgg@gmail.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        "open list:ARM/Mediatek SoC support:Keyword:mediatek" 
        <linux-kernel@vger.kernel.org>,
        "moderated list:ARM/Mediatek SoC support:Keyword:mediatek" 
        <linux-arm-kernel@lists.infradead.org>,
        "moderated list:ARM/Mediatek SoC support:Keyword:mediatek" 
        <linux-mediatek@lists.infradead.org>
References: <1701407001-471-1-git-send-email-quic_cang@quicinc.com>
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On 01/12/2023 06:03, Can Guo wrote:
> This series enables HS-G5 support on SM8550.
> 
> This series is rebased on below changes from Mani -
> https://patchwork.kernel.org/project/linux-scsi/patch/20230908145329.154024-1-manivannan.sadhasivam@linaro.org/
> https://patchwork.kernel.org/project/linux-scsi/patch/20230908145329.154024-2-manivannan.sadhasivam@linaro.org/
> 
> This series is tested on below HW combinations -
> SM8550 MTP + UFS4.0
> SM8550 QRD + UFS3.1
> SM8450 MTP + UFS3.1 (for regression test)
> SM8350 MTP + UFS3.1 (for regression test)
> 
> Note that during reboot test on above platforms, I occasinally hit PA (PHY)
> error during the 2nd init, this is not related with this series. A fix for
> this is mentioned in below patchwork -
> 
> https://patchwork.kernel.org/project/linux-scsi/patch/1698145815-17396-1-git-send-email-quic_ziqichen@quicinc.com/
> 
> Also note that on platforms, which have two sets of UFS PHY settings are
> provided (say G4 and no-G4, G5 and no-G5). The two sets of PHY settings are
> basically programming different values to different registers, mixing the
> two sets and/or overwriting one set with another set is definitely not
> blessed by UFS PHY designers. For SM8550, this series will make sure we
> honor the rule. However, for old targets Mani and I will fix them in
> another series in future.
> 
> v6 -> v7:
> 1. Rebased on linux-next, based SM8650 PHY settings are merged there, no changes to patches for UFS driver
> 2. Addressed comments from Mani
> 
> v5 -> v6:
> 1. Rebased on scsi-queue-6.8
> 2. Addressed comments from Dmitry and Mani in patches to phy-qcom-qmp-ufs.c
> 
> v4 -> v5:
> Removed two useless debug prints in patch #9
> 
> v3 -> v4:
> Used .tbls_hs_overlay array instead of adding more tables with different names like .tbls_hs_g5
> 
> v2 -> v3:
> 1. Addressed comments from Andrew, Mani and Bart in patch #1
> 2. Added patch #2 as per request from Andrew and Mani
> 3. Added patch #4 to fix a common issue on old targets, it is not necessary
>     for this series, but put in this series only because it would be easier
>     to maintain and no need to rebase
> 4. Addressed comments from Dmitry and Mani in patches to phy-qcom-qmp-ufs.c
> 
> v1 -> v2:
> 1. Removed 2 changes which were exposing power info in sysfs
> 2. Removed 1 change which was moving data structs to phy-qcom-qmp-ufs.h
> 3. Added one new change (the 1st one) to clean up usage of ufs_dev_params based on comments from Mani
> 4. Adjusted the logic of UFS device version detection according to comments from Mani:
> 	4.1 For HW version < 0x5, go through dual init
>   	4.2 For HW version >= 0x5
> 		a. If UFS device version is populated, one init is required
> 		b. If UFS device version is not populated, go through dual init
> 
> Bao D. Nguyen (1):
>    scsi: ufs: ufs-qcom: Add support for UFS device version detection
> 
> Can Guo (9):
>    scsi: ufs: host: Rename structure ufs_dev_params to ufs_host_params
>    scsi: ufs: ufs-qcom: No need to set hs_rate after
>      ufshcd_init_host_param()
>    scsi: ufs: ufs-qcom: Setup host power mode during init
>    scsi: ufs: ufs-qcom: Allow the first init start with the maximum
>      supported gear
>    scsi: ufs: ufs-qcom: Limit HS-G5 Rate-A to hosts with HW version 5
>    scsi: ufs: ufs-qcom: Set initial PHY gear to max HS gear for HW ver 4
>      and newer
>    scsi: ufs: ufs-qcom: Check return value of phy_set_mode_ext()
>    phy: qualcomm: phy-qcom-qmp-ufs: Rectify SM8550 UFS HS-G4 PHY Settings
>    phy: qualcomm: phy-qcom-qmp-ufs: Add High Speed Gear 5 support for
>      SM8550
> 
>   drivers/phy/qualcomm/phy-qcom-qmp-pcs-ufs-v6.h     |   2 +
>   drivers/phy/qualcomm/phy-qcom-qmp-qserdes-com-v6.h |   2 +
>   .../qualcomm/phy-qcom-qmp-qserdes-txrx-ufs-v6.h    |   9 +
>   drivers/phy/qualcomm/phy-qcom-qmp-ufs.c            | 191 ++++++++++++++++++---
>   drivers/ufs/host/ufs-exynos.c                      |   7 +-
>   drivers/ufs/host/ufs-hisi.c                        |  11 +-
>   drivers/ufs/host/ufs-mediatek.c                    |  12 +-
>   drivers/ufs/host/ufs-qcom.c                        |  97 ++++++++---
>   drivers/ufs/host/ufs-qcom.h                        |   7 +-
>   drivers/ufs/host/ufshcd-pltfrm.c                   |  69 ++++----
>   drivers/ufs/host/ufshcd-pltfrm.h                   |  10 +-
>   11 files changed, 309 insertions(+), 108 deletions(-)
> 

Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-QRD

Thanks,
Neil