Hello, Le 27/01/2024 à 05:48, Tony Lindgren a écrit : > Hi, > > * 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? I can't test with a wlan device but I noticed the same issue on micro-sd (the mmc0 interface in my first post is a micro-sd) > > 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. It seems mmc0 ios infos are lost at some point, just after the kernel boot they are correct: cat /sys/kernel/debug/mmc0/ios clock: 50000000 Hz vdd: 21 (3.3 ~ 3.4 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 2 (4 bits) timing spec: 2 (sd high-speed) signal voltage: 0 (3.30 V) driver type: 0 (driver type B) And without notice, ios became wrong: cat /sys/kernel/debug/mmc0/ios clock: 0 Hz vdd: 0 (invalid) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 0 (off) bus width: 0 (1 bits) timing spec: 0 (legacy) signal voltage: 0 (3.30 V) driver type: 0 (driver type B) # cat /sys/bus/mmc/devices/mmc0:1234/type SD Best regards, Romain > > Regards, > > Tony > >> [1] >> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f433e8aac6b94218394c6e7b80bb89e4e79c9549 >> [2] >> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3edf588e7fe00e90d1dc7fb9e599861b2c2cf442 >
