Re: sdhci-omap: issues with PM features since 5.16

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* Romain Naour <romain.naour@xxxxxxxx> [240126 20:53]:
> Hello,
> I'm upgrading the kernel from 5.10.168 to 6.1.69 (both from TI tree) on a custom
> board based on a AM574x SoC and I noticed a regression on the sdhci-omap driver.
> The emmc was working on the 5.10 kernel using mmc-hs200 powered at 1,8v (mmc2).

Is this limited to emmc or does it also happen with the micro-sd or wlan possibly?

If the issue is emmc related, do you have mmc-pwrseq-emmc configured in the dts?

> I'm able to reproduce on the IDK574x evaluation board (where the emmc is powered
> at 3v3) with vanilla kernels.

OK, looks like only am5729-beagleboneai.dts has configured mmc-pwrseq-emmc.

> I had to revert all commits related to "PM runtime functions" [1] and "card
> power off and enable aggressive PM" [2] from kernel 5.16 to use the emmc again
> on both boards.

OK, this sounds like power sequence related when the emmc gets idled.



> [1]
> [2]

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