linux-kernel - Re: [PATCH v3 0/4] scsi: ufs: qcom: Suspend fixes

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Message-ID: <20241226043451.vnm2nxm52foqnwlo@thinkpad>
Date: Thu, 26 Dec 2024 10:04:51 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: "Martin K. Petersen" <martin.petersen@...cle.com>
Cc: Alim Akhtar <alim.akhtar@...sung.com>,
	Avri Altman <avri.altman@....com>,
	Bart Van Assche <bvanassche@....org>,
	Abel Vesa <abel.vesa@...aro.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Konrad Dybcio <konradybcio@...nel.org>, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	Amit Pundir <amit.pundir@...aro.org>,
	Nitin Rawat <quic_nitirawa@...cinc.com>, stable@...r.kernel.org,
	Ram Kumar Dwivedi <quic_rdwivedi@...cinc.com>
Subject: Re: [PATCH v3 0/4] scsi: ufs: qcom: Suspend fixes

On Thu, Dec 19, 2024 at 10:20:40PM +0530, Manivannan Sadhasivam via B4 Relay wrote:
> Hi,
> 
> This series fixes the several suspend issues on Qcom platforms. Patch 1 fixes
> the resume failure with spm_lvl=5 suspend on most of the Qcom platforms. For
> this patch, I couldn't figure out the exact commit that caused the issue. So I
> used the commit that introduced reinit support as a placeholder.
> 
> Patch 4 fixes the suspend issue on SM8550 and SM8650 platforms where UFS
> PHY retention is not supported. Hence the default spm_lvl=3 suspend fails. So
> this patch configures spm_lvl=5 as the default suspend level to force UFSHC/
> device powerdown during suspend. This supersedes the previous series [1] that
> tried to fix the issue in clock drivers.
> 
> This series is tested on Qcom SM8550 QRD, SM8650 QRD and Qcom RB5 boards.
> 
> [1] https://lore.kernel.org/linux-arm-msm/20241107-ufs-clk-fix-v1-0-6032ff22a052@linaro.org
> 

Martin, can you please pick up this series?

- Mani

> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
> Changes in v3:
> - Added a patch that honors the runtime/system PM levels set by host drivers.
>   Otherwise patch 4 doesn't have any effect. This was discovered with SM8650
>   QRD.
> - Collected tags
> - Link to v2: https://lore.kernel.org/r/20241213-ufs-qcom-suspend-fix-v2-0-1de6cd2d6146@linaro.org
> 
> Changes in v2:
> - Changed 'ufs_qcom_drvdata::quirks' type to 'enum ufshcd_quirks'
> - Collected tags
> - Link to v1: https://lore.kernel.org/r/20241211-ufs-qcom-suspend-fix-v1-0-83ebbde76b1c@linaro.org
> 
> ---
> Manivannan Sadhasivam (4):
>       scsi: ufs: qcom: Power off the PHY if it was already powered on in ufs_qcom_power_up_sequence()
>       scsi: ufs: core: Honor runtime/system PM levels if set by host controller drivers
>       scsi: ufs: qcom: Allow passing platform specific OF data
>       scsi: ufs: qcom: Power down the controller/device during system suspend for SM8550/SM8650 SoCs
> 
>  drivers/ufs/core/ufshcd-priv.h |  6 ------
>  drivers/ufs/core/ufshcd.c      | 10 ++++++----
>  drivers/ufs/host/ufs-qcom.c    | 31 +++++++++++++++++++------------
>  drivers/ufs/host/ufs-qcom.h    |  5 +++++
>  include/ufs/ufshcd.h           |  2 --
>  5 files changed, 30 insertions(+), 24 deletions(-)
> ---
> base-commit: 40384c840ea1944d7c5a392e8975ed088ecf0b37
> change-id: 20241211-ufs-qcom-suspend-fix-5618e9c56d93
> 
> Best regards,
> -- 
> Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> 
> 

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