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From: Rex-BC Chen <rex-bc.chen@mediatek.com>
To: AngeloGioacchino Del Regno 
	<angelogioacchino.delregno@collabora.com>, <rafael@kernel.org>,
	<viresh.kumar@linaro.org>, <robh+dt@kernel.org>,
	<krzk+dt@kernel.org>
Cc: <matthias.bgg@gmail.com>, <jia-wei.chang@mediatek.com>,
	<roger.lu@mediatek.com>, <hsinyi@google.com>,
	<linux-pm@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>,
	<Project_Global_Chrome_Upstream_Group@mediatek.com>
Subject: Re: [PATCH V2 12/15] cpufreq: mediatek: Use maximum voltage in init stage
Date: Thu, 14 Apr 2022 11:40:37 +0800	[thread overview]
Message-ID: <fc1e157470d7ad68efd823f38fe4a360ba3dfbde.camel@mediatek.com> (raw)
In-Reply-To: <5f788a8f-7092-19ca-8499-d3626c4a386d@collabora.com>

On Fri, 2022-04-08 at 15:37 +0200, AngeloGioacchino Del Regno wrote:
> Il 08/04/22 06:59, Rex-BC Chen ha scritto:
> > From: Jia-Wei Chang <jia-wei.chang@mediatek.com>
> > 
> > Two or more clients may use the same regulator, and it could cause
> > the
> > issue of high-freqeuncy-low-voltage.
> > To prevent this, we use maximum voltage in
> > mtk_cpu_dvfs_info_init().
> > 
> > Signed-off-by: Jia-Wei Chang <jia-wei.chang@mediatek.com>
> 
> Is this happening for proc-supply (proc_reg)?
> ...because it looks like it is, so you should send this commit
> separately
> and with an appropriate Fixes: tag.

Hello all,

If we use the value of max(booting voltage, target cpufreq voltage)
when cci is not ready, I think we don't need this patch to prevent high
frequenc low voltage issue.
(mentioned in [1])

I will drop this patch in next version.

Thanks.

[1]:https://patchwork.kernel.org/comment/24816091/

BRs,
Rex


  parent reply	other threads:[~2022-04-14  3:40 UTC|newest]

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-08  4:58 [PATCH V2 00/15] cpufreq: mediatek: Cleanup and support MT8183 and MT8186 Rex-BC Chen
2022-04-08  4:58 ` [PATCH V2 01/15] dt-bindings: cpufreq: mediatek: Add MediaTek CCI property Rex-BC Chen
2022-04-08  8:10   ` Krzysztof Kozlowski
2022-04-08 10:24     ` Rex-BC Chen
2022-04-08 11:49       ` Krzysztof Kozlowski
2022-04-11  6:48         ` Rex-BC Chen
2022-04-08  4:58 ` [PATCH V2 02/15] cpufreq: mediatek: Use module_init and add module_exit Rex-BC Chen
2022-04-08 13:36   ` AngeloGioacchino Del Regno
2022-04-11  3:17     ` Viresh Kumar
2022-04-08  4:58 ` [PATCH V2 03/15] cpufreq: mediatek: Cleanup variables and error handling in mtk_cpu_dvfs_info_init() Rex-BC Chen
2022-04-08 13:36   ` AngeloGioacchino Del Regno
2022-04-11  3:20     ` Viresh Kumar
2022-04-08  4:58 ` [PATCH V2 04/15] cpufreq: mediatek: Remove unused headers Rex-BC Chen
2022-04-08 13:36   ` AngeloGioacchino Del Regno
2022-04-11  3:21     ` Viresh Kumar
2022-04-08  4:58 ` [PATCH V2 05/15] cpufreq: mediatek: Enable clocks and regulators Rex-BC Chen
2022-04-08 13:36   ` AngeloGioacchino Del Regno
2022-04-11  3:22     ` Viresh Kumar
2022-04-08  4:58 ` [PATCH V2 06/15] cpufreq: mediatek: Record previous target vproc value Rex-BC Chen
2022-04-08 13:36   ` AngeloGioacchino Del Regno
2022-04-11 11:35     ` Rex-BC Chen
2022-04-11  3:26   ` Viresh Kumar
2022-04-11 11:33     ` Rex-BC Chen
2022-04-08  4:59 ` [PATCH V2 08/15] cpufreq: mediatek: Move voltage limits to platform data Rex-BC Chen
2022-04-08 13:36   ` AngeloGioacchino Del Regno
2022-04-11 11:18     ` Rex-BC Chen
2022-04-08  4:59 ` [PATCH V2 09/15] cpufreq: mediatek: Add .get function Rex-BC Chen
2022-04-08  4:59 ` [PATCH V2 10/15] cpufreq: mediatek: Make sram regulator optional Rex-BC Chen
2022-04-08 13:37   ` AngeloGioacchino Del Regno
2022-04-08 20:32   ` Kevin Hilman
2022-04-14 10:53     ` Rex-BC Chen
2022-04-14 17:20       ` Kevin Hilman
2022-04-08  4:59 ` [PATCH V2 11/15] cpufreq: mediatek: Update logic of voltage_tracking() Rex-BC Chen
2022-04-08 21:08   ` Kevin Hilman
2022-04-14 11:30     ` Rex-BC Chen
2022-04-08  4:59 ` [PATCH V2 12/15] cpufreq: mediatek: Use maximum voltage in init stage Rex-BC Chen
2022-04-08 13:37   ` AngeloGioacchino Del Regno
2022-04-12 11:24     ` Rex-BC Chen
2022-04-14  3:40     ` Rex-BC Chen [this message]
2022-04-08  4:59 ` [PATCH V2 13/15] cpufreq: mediatek: Link CCI device to CPU Rex-BC Chen
2022-04-08 13:37   ` AngeloGioacchino Del Regno
2022-04-11 11:50     ` Rex-BC Chen
2022-04-08 20:54   ` Kevin Hilman
2022-04-11 11:51     ` Rex-BC Chen
2022-04-11 12:31     ` Rex-BC Chen
2022-04-11 18:13       ` Kevin Hilman
2022-04-12 12:26         ` Rex-BC Chen
2022-04-12 18:50           ` Kevin Hilman
2022-04-13 11:32             ` Rex-BC Chen
2022-04-13 21:41               ` Kevin Hilman
2022-04-14  2:32                 ` Rex-BC Chen
2022-04-14 21:48                   ` Kevin Hilman
2022-04-15  2:31                     ` Rex-BC Chen
2022-04-19 18:16                       ` Kevin Hilman
2022-04-08  4:59 ` [PATCH V2 14/15] cpufreq: mediatek: Add support for MT8186 Rex-BC Chen
2022-04-08 13:37   ` AngeloGioacchino Del Regno
2022-04-08 21:10   ` Kevin Hilman
2022-04-11 11:14     ` Rex-BC Chen
2022-04-08  4:59 ` [PATCH V2 15/15] cpufreq: mediatek: Use device print to show logs Rex-BC Chen
2022-04-08 13:37   ` AngeloGioacchino Del Regno
2022-04-11  3:29   ` Viresh Kumar
2022-04-11 11:09     ` Rex-BC Chen
     [not found] ` <20220408045908.21671-8-rex-bc.chen@mediatek.com>
2022-04-08 13:36   ` [PATCH V2 07/15] cpufreq: mediatek: Add opp notification for SVS support AngeloGioacchino Del Regno
2022-04-08 20:29   ` Kevin Hilman
     [not found]     ` <3b7bf25a3da6c8f780c87784c1f796bf1e464238.camel@mediatek.com>
2022-04-11 18:09       ` Kevin Hilman
     [not found]         ` <dfe2d3e3401a6f2a7be9db4e8a0590d3dd9a6969.camel@mediatek.com>
2022-04-12 18:04           ` Kevin Hilman
2022-04-08 21:11 ` [PATCH V2 00/15] cpufreq: mediatek: Cleanup and support MT8183 and MT8186 Kevin Hilman
2022-04-09  1:05   ` Hsin-Yi Wang
2022-04-11 11:37     ` Rex-BC Chen

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