linux-kernel - Re: [PATCH] spi: Increase imx51 ecspi burst length based on transfer length

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Date:   Wed, 28 Jun 2023 15:20:39 +0200
From:   Stefan Moring <stefan.moring@...hnolution.nl>
To:     Fabio Estevam <festevam@...il.com>
Cc:     broonie@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        linux-imx@....com, linux-spi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] spi: Increase imx51 ecspi burst length based on transfer length

Hi Fabio,

In our application we send ~80kB at 10MHz. The total transfer time
went from ~80ms to 67ms, so that would be a reduction of 15%.
I tested it on an IMX8MM platform.

Kind regards,

Stefan Moring

Op wo 28 jun 2023 om 15:16 schreef Fabio Estevam <festevam@...il.com>:
>
> Hi Stefan,
>
> On Wed, Jun 28, 2023 at 9:54 AM Stefan Moring
> <stefan.moring@...hnolution.nl> wrote:
> >
> > IMX51 supports 4096 bit burst lengths. Using the spi transfer length
> > instead of bits_per_word increases performance significantly.
>
> Could you please share the performance increase after this change?
>
> Thanks