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

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Message-ID: <691a9317-238e-487b-ae5a-6bb0d73e37dd@kernel.org>
Date: Wed, 3 Sep 2025 08:18:34 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Aaron Kling <webgeek1234@...il.com>
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 02/09/2025 18:51, Aaron Kling wrote:
> 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?

In whatever way you wish, but you must clearly express dependencies and
any merge restrictions.

Best regards,
Krzysztof