linux-kernel - Re: [PATCH 0/2] Enable UFS ICE clock scaling

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Message-ID: <iy6ls7c2bjnzpfcuact4vd5fba7phmng2vlhzaxxix6hlevjbz@gnva4h2d4vsm>
Date: Fri, 3 Oct 2025 22:18:15 +0530
From: Manivannan Sadhasivam <mani@...nel.org>
To: Abhinaba Rakshit <abhinaba.rakshit@....qualcomm.com>
Cc: Bjorn Andersson <andersson@...nel.org>, 
	Konrad Dybcio <konradybcio@...nel.org>, "James E.J. Bottomley" <James.Bottomley@...senpartnership.com>, 
	"Martin K. Petersen" <martin.petersen@...cle.com>, linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-scsi@...r.kernel.org
Subject: Re: [PATCH 0/2] Enable UFS ICE clock scaling

On Wed, Oct 01, 2025 at 05:08:18PM +0530, Abhinaba Rakshit wrote:
> This API enables dynamic scaling of the ICE (Inline Crypto Engine) clock,

Which API?

> which is tightly integrated with the host controller. It is invoked by the UFS 
> host controller driver in response to clock scaling requests, ensuring
> coordination between ICE and the host controller.
> 
> This API helps prevent degradation in storage read/write KPIs,
> maintaining consistent I/O throughput performance.

I'd expect clock scaling to save some power, than 'preventing degradation in
performance'.

> 
> The implementation has been tested using tiotest to verify that enabling ICE
> does not negatively impact host controller I/O performance during
> read/write operations.
> 

On which platform?

- Mani

> Signed-off-by: Abhinaba Rakshit <abhinaba.rakshit@....qualcomm.com>
> ---
> Abhinaba Rakshit (2):
>       soc: qcom: ice: enable ICE clock scaling API
>       ufs: host: scale ICE clock
> 
>  drivers/soc/qcom/ice.c      | 25 +++++++++++++++++++++++++
>  drivers/ufs/host/ufs-qcom.c | 14 ++++++++++++++
>  include/soc/qcom/ice.h      |  1 +
>  3 files changed, 40 insertions(+)
> ---
> base-commit: 3b9b1f8df454caa453c7fb07689064edb2eda90a
> change-id: 20251001-enable-ufs-ice-clock-scaling-9c55598295f6
> 
> Best regards,
> -- 
> Abhinaba Rakshit <abhinaba.rakshit@....qualcomm.com>
> 

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