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). The first sign of the issue is a cache flush error during the first boot: mmc1: cache flush error -110 (ETIMEDOUT) mmc1: error -110 doing aggressive suspend followed by I/O errors produced by fdisk -l /dev/mmcblk1boot1: I/O error, dev mmcblk1boot0, sector 64384 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 I/O error, dev mmcblk1boot1, sector 64384 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 I/O error, dev mmcblk1boot1, sector 64384 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev mmcblk1boot1, logical block 8048, async page read I/O error, dev mmcblk1boot0, sector 64384 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev mmcblk1boot0, logical block 8048, async page read Here is what I had as mmc infos on 5.10 kernel: # 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) # cat /sys/kernel/debug/mmc1/ios clock: 192000000 Hz vdd: 7 (1.65 - 1.95 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 3 (8 bits) timing spec: 9 (mmc HS200) signal voltage: 1 (1.80 V) driver type: 0 (driver type B) Now with 6.1: # 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/kernel/debug/mmc1/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: 1 (1.80 V) driver type: 0 (driver type B) I'm able to reproduce on the IDK574x evaluation board (where the emmc is powered at 3v3) with vanilla kernels. 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. [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 Best regards, Romain
