linux-kernel - Re: [PATCH v2 0/2] arm64: dts: meson: remove CPU opps below 1GHz for G12B/SM1

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Date:   Mon,  4 Apr 2022 09:53:35 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     linux-arm-kernel@...ts.infradead.org,
        Kevin Hilman <khilman@...libre.com>,
        linux-amlogic@...ts.infradead.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Christian Hewitt <christianshewitt@...il.com>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Cc:     Neil Armstrong <narmstrong@...libre.com>
Subject: Re: [PATCH v2 0/2] arm64: dts: meson: remove CPU opps below 1GHz for G12B/SM1

Hi,

On Thu, 10 Feb 2022 10:06:36 +0000, Christian Hewitt wrote:
> Amlogic G12B and SM1 devices experience CPU stalls and random board
> wedges when the system idles and CPU cores clock down to lower opp
> points. Recent vendor kernels include a change to remove 100-250MHz
> (with no explanation) [0] but other downstream sources also remove
> the 500/667MHz points (also with no explanation). Unless 100-667Mhz
> opps are removed or the CPU governor forced to performance, stalls
> are observed, so let's remove them an improve stability/uptime.
> 
> [...]

Thanks, Applied to https://git.kernel.org/pub/scm/linux/kernel/git/amlogic/linux.git (v5.18/fixes)

[1/2] arm64: dts: meson: remove CPU opps below 1GHz for G12B boards
      https://git.kernel.org/amlogic/c/6c4d636bc00dc17c63ffb2a73a0da850240e26e3
[2/2] arm64: dts: meson: remove CPU opps below 1GHz for SM1 boards
      https://git.kernel.org/amlogic/c/fd86d85401c2049f652293877c0f7e6e5afc3bbc

-- 
Neil