linux-kernel - Re: [PATCH v2 0/8] Support dynamic EMC frequency scaling on Tegra186/Tegra194

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Message-ID: <CALHNRZ-okVZ8tzKYa=jqudDu3dZ_Yq1CkeErdcvxi5xJEgJFbg@mail.gmail.com>
Date: Sun, 12 Oct 2025 21:18:38 -0500
From: Aaron Kling <webgeek1234@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Thierry Reding <thierry.reding@...il.com>, Jonathan Hunter <jonathanh@...dia.com>, 
	"Rafael J. Wysocki" <rafael@...nel.org>, Viresh Kumar <viresh.kumar@...aro.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, linux-kernel@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-tegra@...r.kernel.org, 
	linux-pm@...r.kernel.org
Subject: Re: [PATCH v2 0/8] Support dynamic EMC frequency scaling on Tegra186/Tegra194

On Wed, Oct 8, 2025 at 7:05 PM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On 09/09/2025 15:21, Aaron Kling via B4 Relay wrote:
> > This series borrows the concept used on Tegra234 to scale EMC based on
> > CPU frequency and applies it to Tegra186 and Tegra194. Except that the
> > bpmp on those archs does not support bandwidth manager, so the scaling
> > iteself is handled similar to how Tegra124 currently works.
> >
>
> Nothing improved:
> https://lore.kernel.org/all/20250902-glittering-toucan-of-feminism-95fd9f@kuoka/

The dt changes should go last. The cpufreq and memory pieces can go in
either order because the new code won't be used unless the dt pieces
activate them.

Aaron