From: "Peter Wang (王信友)" <peter.wang@mediatek.com>
To: "quic_cang@quicinc.com" <quic_cang@quicinc.com>,
"martin.petersen@oracle.com" <martin.petersen@oracle.com>,
"adrian.hunter@intel.com" <adrian.hunter@intel.com>,
"bvanassche@acm.org" <bvanassche@acm.org>,
"quic_nguyenb@quicinc.com" <quic_nguyenb@quicinc.com>,
"quic_nitirawa@quicinc.com" <quic_nitirawa@quicinc.com>,
"avri.altman@wdc.com" <avri.altman@wdc.com>
Cc: "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"beanhuo@micron.com" <beanhuo@micron.com>,
"neil.armstrong@linaro.org" <neil.armstrong@linaro.org>,
"alim.akhtar@samsung.com" <alim.akhtar@samsung.com>,
"James.Bottomley@HansenPartnership.com"
<James.Bottomley@HansenPartnership.com>,
"ebiggers@kernel.org" <ebiggers@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 2/2] scsi: ufs: core: Replace hard coded vcc-off delay with a variable
Date: Tue, 14 Oct 2025 02:07:14 +0000 [thread overview]
Message-ID: <029cdc3ae16fd669a862cf49a9e082561582aacb.camel@mediatek.com> (raw)
In-Reply-To: <72fa649406a0bf02271575b7d58f22c968aa5d7e.1760383740.git.quic_nguyenb@quicinc.com>
On Mon, 2025-10-13 at 12:38 -0700, Bao D. Nguyen wrote:
> After the ufs device vcc is powered off, all the ufs device
> manufacturers require a minimum of 1ms of power-off time before
> vcc can be powered on again. This requirement has been verified
> with all the ufs device manufacturer's datasheets.
>
> Replace the hard coded 5ms delay with a variable with a default
> setting of 2ms to improve the system resume latency. The platform
> drivers can override this setting as needed.
>
> Signed-off-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>
> Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
next prev parent reply other threads:[~2025-10-14 2:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-13 19:38 [PATCH v3 0/2] *** Remove UFS_DEVICE_QUIRK_DELAY_AFTER_LPM quirk *** Bao D. Nguyen
2025-10-13 19:38 ` [PATCH v3 1/2] scsi: ufs: core: Remove UFS_DEVICE_QUIRK_DELAY_AFTER_LPM quirk Bao D. Nguyen
2025-10-13 19:38 ` [PATCH v3 2/2] scsi: ufs: core: Replace hard coded vcc-off delay with a variable Bao D. Nguyen
2025-10-14 2:07 ` Peter Wang (王信友) [this message]
2025-10-22 1:25 ` [PATCH v3 0/2] *** Remove UFS_DEVICE_QUIRK_DELAY_AFTER_LPM quirk *** Martin K. Petersen
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