linux-kernel - Re: [PATCH v18 0/2] Add memory bandwidth management to NVIDIA Tegra DRM driver

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Message-ID: <50912a57-aa43-58b0-02d2-6928578d6286@gmail.com>
Date:   Mon, 21 Jun 2021 07:19:15 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>
Cc:     linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Matt Merhar <mattmerhar@...tonmail.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>
Subject: Re: [PATCH v18 0/2] Add memory bandwidth management to NVIDIA Tegra
 DRM driver

07.06.2021 01:40, Dmitry Osipenko пишет:
> 01.06.2021 07:21, Dmitry Osipenko пишет:
>> This series adds memory bandwidth management to the NVIDIA Tegra DRM driver,
>> which is done using interconnect framework. It fixes display corruption that
>> happens due to insufficient memory bandwidth.
>>
>> Changelog:
>>
>> v18: - Moved total peak bandwidth from CRTC state to plane state and removed
>>        dummy plane bandwidth state initialization from T186+ plane hub. This
>>        was suggested by Thierry Reding to v17.
>>
>>      - I haven't done anything about the cursor's plane bandwidth which
>>        doesn't contribute to overlapping bandwidths for a small sized
>>        window because it works okay as-is.
> 
> Thierry, will you take these patches for 5.14?
> 

The display controller does _NOT_WORK_ properly without bandwidth
management. Can we get this patch into 5.14? What is the problem?