From: Jerome Brunet <jbrunet@baylibre.com>
To: Marc Gonzalez <marc.w.gonzalez@free.fr>,
linux-wireless@vger.kernel.org, MMC <linux-mmc@vger.kernel.org>,
AML <linux-amlogic@lists.infradead.org>
Cc: Neil Armstrong <neil.armstrong@linaro.org>,
Arend van Spriel <aspriel@gmail.com>,
Franky Lin <franky.lin@broadcom.com>,
Hante Meuleman <hante.meuleman@broadcom.com>,
Kalle Valo <kvalo@kernel.org>, Eric Dumazet <edumazet@google.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>,
Alexander Prutskov <alep@cypress.com>,
Joseph chuang <jiac@cypress.com>,
Kevin Hilman <khilman@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@gmail.com>,
Angus Ainslie <angus@akkea.ca>,
Heiner Kallweit <hkallweit1@gmail.com>,
Pierre-Hugues Husson <phh@phh.me>
Subject: Re: Performance lower than expected with BCM4359/9 on S905X2
Date: Tue, 21 Mar 2023 14:54:39 +0100 [thread overview]
Message-ID: <1jcz526w53.fsf@starbuckisacylon.baylibre.com> (raw)
In-Reply-To: <ce0bd9a5-e44d-b30b-3434-9d5fd36e251a@free.fr>
>
> I was not asking anyone to reproduce my exact setup.
>
> I find it confusing that some assume there is something different
> about the board I'm using. The more likely hypothesis is that all
> S905X2 boards have the same behavior.
High-speed MMC modes are usually defined/limited per boards.
Check the different DTs in arch/arm64/boot/dts/amlogic, you'll see
that not all have the same configs.
Yes the S905X2 has the bounce buffer work-around which plays a role on
the overall performance. MMC high-speed modes is critical just has well.
The Amlogic 4.9 downstream does all kinds of fancy (and unsafe) things
to enable higher modes.
So there is no assumption here, merely a tentative to get a clearer
picture.
>
> Regards
_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic
next prev parent reply other threads:[~2023-03-21 14:02 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 10:40 [Performance regression] " Marc Gonzalez
2023-03-21 10:46 ` Jerome Brunet
2023-03-21 12:37 ` Performance lower than expected with " Marc Gonzalez
2023-03-21 13:54 ` Jerome Brunet [this message]
2023-03-21 16:48 ` Marc Gonzalez
[not found] ` <EEE9FD80-C106-4A9B-AA8D-5C151E540CFD@hewittfamily.org.uk>
2023-04-04 16:09 ` [Performance regression] " Marc Gonzalez
2023-04-04 21:06 ` Martin Blumenstingl
2023-04-06 16:35 ` Marc Gonzalez
2023-04-06 17:07 ` Christian Hewitt
2023-04-06 17:41 ` Neil Armstrong
2023-04-17 14:22 ` Marc Gonzalez
2023-03-21 11:45 ` Neil Armstrong
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