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

[Marc Kleine-Budde]

Hi Stefan,

On 28.06.2023 15:20:39, Stefan Moring wrote:
> 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.

I'm currently debugging a problem with spi-imx, HW CS and SPI_CS_WORD on
torvalds/master. The breakage goes back this patch.

I'm wondering what is your setup you have optimized with this patch?
- Are you using HW or GPIO CS?
- What are bits_per_word?
- What's the length of the spi_transfer?

I'm asking because with a 8, 16 or 32 bit-per-word setting, the driver
should use dynamic_burst on the imx8mm, which will overwrite the burst
length in spi_imx_push().

regards,
Marc

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