linux-kernel - Re: spi: imx: Increase imx51 ecspi burst length fails on imx6dl and imx8mm

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Message-ID: <ZVx1ic9/vxDDStoE@francesco-nb.int.toradex.com>
Date:   Tue, 21 Nov 2023 10:16:57 +0100
From:   Francesco Dolcini <francesco@...cini.it>
To:     Thorsten Leemhuis <regressions@...mhuis.info>, linux@...ler.io
Cc:     Francesco Dolcini <francesco@...cini.it>,
        Stefan Moring <stefan.moring@...hnolution.nl>,
        Linux regressions mailing list <regressions@...ts.linux.dev>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
        linux-spi@...r.kernel.org
Subject: Re: spi: imx: Increase imx51 ecspi burst length fails on imx6dl and
 imx8mm

On Tue, Nov 21, 2023 at 10:06:51AM +0100, Thorsten Leemhuis wrote:
> On 20.11.23 18:48, Francesco Dolcini wrote:
> > On Mon, Nov 20, 2023 at 04:30:15PM +0100, Stefan Moring wrote:
> >> Can you verify the values used for the transfer,  spi_imx->count and spi_imx->
> >> bits_per_word inside the mx51_ecpsi_prepare_transfer() method? Those are the
> >> only two things that changed in the commits. Maybe compare them to the working
> >> version?
> > 
> > I would suggest to bisect the issue to the actual commit that
> > introduced the regression, I do not think this was done yet.
> 
> I think it was. To quote
Whoops, you are right.

> spi: Increase imx51 ecspi burst length based on transfer length
> 15a6af94a2779d5dfb42ee4bfac858ea8e964a3f
> 
> spi: imx: Take in account bits per word instead of assuming 8-bits
> 5f66db08cbd3ca471c66bacb0282902c79db9274

Do we know which one of those two commits introduces this regression?

Francesco