Ivan Dubrov

Found the problem. The following diff shows the issue -- the node names of the regulators were not correct, presumably due to axp1530 => axp313a migration: diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616-bigtreetech-cb1.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616-bigtreetech-cb1.dtsi index 8a18476307ff..e82da4b6e340 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-h616-bigtreetech-cb1.dtsi +++ b/arch/arm64/boot/dts/allwinner/sun50i-h616-bigtreetech-cb1.dtsi @@ -234,20 +234,20 @@ reg_dcdc3: dcdc3 { regulator-step-delay-us = <25>; regulator-final-delay-us = <50>; regulator-always-on; }; - reg_aldo1: ldo1 { + reg_aldo1: aldo1 { regulator-name = "axp313a-aldo1"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; regulator-step-delay-us = <25>; regulator-final-delay-us = <50>; regulator-always-on; }; - reg_dldo1: ldo2 { + reg_dldo1: dldo1 { regulator-name = "axp313a-dldo1"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; regulator-step-delay-us = <25>; regulator-final-delay-us = <50>;

Yeah, I tried that. The very same card works with older Linux kernels. By adding some debugging to the kernel itself, I found that MMC host never initializes fully (mmc@4020000 in device tree). All 5 attempts end after this line in the "drivers/mmc/host/sunxi-mmc.c": ret = mmc_regulator_get_supply(host->mmc); Which gets "-EPROBE_DEFER" on all 5 attempts. It looks like VMMC voltage regulator does not get initialized, not sure why. This is what I get when I check the debugfs for deferred devices: (initramfs) cat /sys/kernel/debug/devices_deferred 4020000.mmc

I tried copying DTB file from the working kernel, and it still doesn't work. Also, I looked inside /sys directory and compared it to what I see when board boots fine: Working kernel: >ls /sys/devices/platform/soc/4020000.mmc/mmc_host/mmc0 mmc0:aaaa (does see my SD card) Non-working kernel: >ls /sys/devices/platform/soc/4020000.mmc ??? no mmc_host in that directory ??? This is about where I am out of ideas as I don't have any extensive experience debugging these issues.

Recent images don't boot on BigtreeTech PI V1.2 boards. These are the last log lines I get over the serial: Starting kernel ... Loading, please wait... Starting systemd-udevd version 255.3-1 Begin: Loading essential drivers ... done. Begin: Running /scripts/init-premount ... done. Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done. Begin: Running /scripts/local-premount ... done. Begin: Waiting for root file system ... Begin: Running /scripts/local-block ... done. Begin: Running /scripts/local-block ... done. <...repeated many times...> Begin: Running /scripts/local-block ... done. done. Gave up waiting for root file system device. Common problems: - Boot args (cat /proc/cmdline) - Check rootdelay= (did the system wait long enough?) - Missing modules (cat /proc/modules; ls /dev) ALERT! UUID=0c02e3fa-3cf4-4e86-9829-edeabba5469c does not exist. Dropping to a shell! Image that did work for me: Armbian_23.11.1_Bigtreetech-cb1_bookworm_legacy_6.1.43_minimal.img.xz . I also updated kernel package to linux-image-edge-sun50iw9-btt (6.2.16-edge-sun50iw9-btt), and it works as well. Images that did NOT work: Armbian_24.2.1_Bigtreetech-cb1_bookworm_current_6.6.16_minimal.img.xz (current stable from the website), also I tried the latest nightly build Armbian_24.5.0-trunk.36_Bigtreetech-cb1_trixie_edge_6.7.5_minimal.img.xz I've looked around while in initramfs, and I don't see any /dev/mmcblk0* devices. Also, dmesg doesn't show anything about my SDHC card. For comparison, image that works has this in dmesg output: [ 1.925594] mmc1: host does not support reading read-only switch, assuming write-enable [ 1.928794] mmc1: new high speed SDHC card at address aaaa [ 1.929630] mmcblk1: mmc1:aaaa SK32G 29.7 GiB [ 1.931786] mmcblk1: p1 p2 p3 [ 2.094288] sunxi-mmc 4021000.mmc: initialized, max. request size: 16384 KB, uses new timings mode [ 2.095415] Freeing unused kernel memory: 2752K [ 2.095533] Run /init as init process [ 2.095540] with arguments: [ 2.095545] /init [ 2.095550] splash [ 2.095555] splash [ 2.095560] nofb [ 2.095565] with environment: [ 2.095569] HOME=/ [ 2.095573] TERM=linux [ 2.095578] ubootpart=5d175d74-01 [ 2.095583] cgroup_enable=memory [ 2.100579] sunxi-mmc 4021000.mmc: card claims to support voltages below defined range Image that does not work has this (note -- no logs regarding SDHC card): [ 1.605257] sunxi-mmc 4021000.mmc: initialized, max. request size: 16384 KB, uses new timings mode [ 1.611428] sunxi-mmc 4021000.mmc: card claims to support voltages below defined range [ 1.622065] mmc0: new high speed SDIO card at address 0001 [ 1.636956] usb usb8: New USB device found, idVendor=1d6b, idProduct=0001, bcdDevice= 6.07 [ 1.636974] usb usb8: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 1.636983] usb usb8: Product: Generic Platform OHCI controller [ 1.636990] usb usb8: Manufacturer: Linux 6.7.5-edge-sunxi64 ohci_hcd [ 1.636997] usb usb8: SerialNumber: 5101400.usb [ 1.637568] hub 8-0:1.0: USB hub found [ 1.637623] hub 8-0:1.0: 1 port detected [ 1.639238] Freeing unused kernel memory: 3072K [ 1.652717] Run /init as init process [ 1.652736] with arguments: [ 1.652741] /init [ 1.652746] with environment: [ 1.652751] HOME=/ [ 1.652755] TERM=linux [ 1.652760] splash=verbose [ 1.652765] ubootpart=6aa635ca-01 [ 1.652770] cgroup_enable=memory