linux-kernel - Re: [PATCH V2 0/2] scsi: ufs: Implement Quirks for Samsung UFS Devices

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Message-ID: <a4dd9b12-982d-41c3-94bf-9dcd9e41c30c@quicinc.com>
Date: Sun, 6 Apr 2025 23:57:21 +0530
From: Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>
To: Manish Pandey <quic_mapa@...cinc.com>,
        "James E.J. Bottomley"
	<James.Bottomley@...senPartnership.com>,
        "Martin K. Petersen"
	<martin.petersen@...cle.com>,
        Manivannan Sadhasivam
	<manivannan.sadhasivam@...aro.org>
CC: Alim Akhtar <alim.akhtar@...sung.com>, Avri Altman <avri.altman@....com>,
        Bart Van Assche <bvanassche@....org>, <linux-scsi@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <quic_nitirawa@...cinc.com>, <quic_bhaskarv@...cinc.com>,
        <quic_rampraka@...cinc.com>, <quic_cang@...cinc.com>,
        <quic_nguyenb@...cinc.com>
Subject: Re: [PATCH V2 0/2] scsi: ufs: Implement Quirks for Samsung UFS
 Devices



On 4/4/2025 11:15 PM, Manish Pandey wrote:
> Introduce quirks for Samsung UFS devices to modify the PA TX HSG1 sync
> length and TX_HS_EQUALIZER settings on the Qualcomm UFS Host controller.
For what purpose, these quirks are required ? Is there any problem 
statement which you can mention first ?
> 
> Additionally, Samsung UFS devices require extra time in hibern8 mode
> before exiting, beyond the standard handshaking phase between the host
> and device. Introduce a quirk to increase the PA_HIBERN8TIME parameter
> by 100 µs to ensure a proper hibernation process.
> ---
> Changes in V2
> - Split patches to add PA_HIBERN8TIME quirk in ufshcd.c
> 
> ---
> Manish Pandey (2):
>    ufs: qcom: Add quirks for Samsung UFS devices
>    scsi: ufs: introduce quirk to extend PA_HIBERN8TIME for UFS devices
> 
>   drivers/ufs/core/ufshcd.c   | 31 ++++++++++++++++++++++++++
>   drivers/ufs/host/ufs-qcom.c | 43 +++++++++++++++++++++++++++++++++++++
>   drivers/ufs/host/ufs-qcom.h | 18 ++++++++++++++++
>   include/ufs/ufs_quirks.h    |  6 ++++++
>   4 files changed, 98 insertions(+)
>