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

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Message-ID: <CALHNRZ_CNvq_srzBZytrO6ZReg81Z6g_-Sa+=26kBEHx_c8WQA@mail.gmail.com>
Date: Tue, 2 Sep 2025 11:51:11 -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 0/8] Support dynamic EMC frequency scaling on Tegra186/Tegra194

On Tue, Sep 2, 2025 at 3:23 AM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On Sun, Aug 31, 2025 at 10:33:48PM -0500, Aaron Kling 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.
> >
>
> Three different subsystems and no single explanation of dependencies and
> how this can be merged.

The only cross-subsystem hard dependency is that patches 5 and 6 need
patches 1 and 2 respectively. Patch 5 logically needs patch 3 to
operate as expected, but there should not be compile compile or probe
failures if those are out of order. How would you expect this to be
presented in a cover letter?

Aaron