I ended up patching the u-boot source code used by https://github.com/RobertCNelson/Bootloader-Builder to switch the boot target search order from mmc0, legacy_mmc0, mmc1, legacy_mmc1 to mmc1, legacy_mmc1, mmc0, legacy_mmc0. Then I wrote the MLO and SPL images to the image so they get used during install.
Hope that helps. On Tuesday, December 29, 2020 at 6:18:53 AM UTC-8 zh.d...@gmail.com wrote: > Have you solved the problem? I had a similar problem when BBAI inserted > the SD card and was unable to start the system from eMMC. > > 在2020年10月13日星期二 UTC+8 上午6:40:08<rnid...@gmail.com> 写道： > >> I've got a custom board with SYSBOOT boot order set to always prefer the >> onboard eMMC (MMC1) over the SD card (MMC0), but after initial flash of the >> eMMC it always boots from the SD card if it is present. >> >> I'm speculating that SPL is loaded from MMC1 as I expect but then it is >> using MMC0 as the root device and booting from there. If that is the case, >> what changes are necessary to u-boot and or uEnv.txt to always boot from >> eMMC / MMC1 unless the button to boot from SD is held? >> >> Here is output from /dev/ttyO0 during both scenarios: >> >> *eMMC only, no SD card present* >> >> U-Boot SPL 2019.04-00002-gc9b3922522 (Aug 24 2020 - 16:42:18 -0500) >> Trying to boot from MMC2 >> Loading Environment from EXT4... Card did not respond to voltage select! >> >> >> >> >> U-Boot 2019.04-00002-gc9b3922522 (Aug 24 2020 - 16:42:18 -0500), Build: >> jenkins-github_Bootloader-Builder-144 >> >> CPU : AM335X-GP rev 2.1 >> I2C: ready >> DRAM: 512 MiB >> No match for driver 'omap_hsmmc' >> No match for driver 'omap_hsmmc' >> Some drivers were not found >> Reset Source: Power-on reset has occurred. >> RTC 32KCLK Source: External. >> MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 >> Loading Environment from EXT4... Card did not respond to voltage select! >> Board: BeagleBone Black >> <ethaddr> not set. Validating first E-fuse MAC >> BeagleBone Black: >> BeagleBone Cape EEPROM: no EEPROM at address: 0x54 >> BeagleBone Cape EEPROM: no EEPROM at address: 0x55 >> BeagleBone Cape EEPROM: no EEPROM at address: 0x56 >> BeagleBone Cape EEPROM: no EEPROM at address: 0x57 >> Net: eth0: MII MODE >> cpsw, usb_ether >> Press SPACE to abort autoboot in 0 seconds >> board_name=[A335BNLT] ... >> board_rev=[] ... >> Card did not respond to voltage select! >> Card did not respond to voltage select! >> Card did not respond to voltage select! >> gpio: pin 56 (gpio 56) value is 0 >> gpio: pin 55 (gpio 55) value is 0 >> gpio: pin 54 (gpio 54) value is 0 >> gpio: pin 53 (gpio 53) value is 1 >> Card did not respond to voltage select! >> Card did not respond to voltage select! >> switch to partitions #0, OK >> mmc1(part 0) is current device >> Scanning mmc 1:1... >> gpio: pin 56 (gpio 56) value is 0 >> gpio: pin 55 (gpio 55) value is 0 >> gpio: pin 54 (gpio 54) value is 0 >> gpio: pin 53 (gpio 53) value is 1 >> switch to partitions #0, OK >> mmc1(part 0) is current device >> gpio: pin 54 (gpio 54) value is 1 >> Checking for: /uEnv.txt ... >> Checking for: /boot.scr ... >> Checking for: /boot/boot.scr ... >> Checking for: /boot/uEnv.txt ... >> gpio: pin 55 (gpio 55) value is 1 >> 1054 bytes read in 45 ms (22.5 KiB/s) >> Loaded environment from /boot/uEnv.txt >> debug: [dtb=xxxxx.dtb] ... >> Using: dtb=xxxx.dtb ... >> Checking if uname_r is set in /boot/uEnv.txt... >> gpio: pin 56 (gpio 56) value is 1 >> Running uname_boot ... >> loading /boot/vmlinuz-4.19.94-ti-r43 ... >> 10097528 bytes read in 706 ms (13.6 MiB/s) >> debug: [enable_uboot_overlays=1] ... >> debug: [enable_uboot_cape_universal=1] ... >> debug: [uboot_base_dtb_univ=am335x-boneblack-uboot-univ.dtb] ... >> uboot_overlays: [uboot_base_dtb=am335x-boneblack-uboot-univ.dtb] ... >> uboot_overlays: Switching too: dtb=am335x-boneblack-uboot-univ.dtb ... >> loading /boot/dtbs/4.19.94-ti-r43/am335x-boneblack-uboot-univ.dtb ... >> 60334 bytes read in 59 ms (998 KiB/s) >> uboot_overlays: [fdt_buffer=0x60000] ... >> uboot_overlays: loading /lib/firmware/BB-ADC-00A0.dtbo ... >> 867 bytes read in 318 ms (2 KiB/s) >> uboot_overlays: loading /lib/firmware/BB-BONE-eMMC1-01-00A0.dtbo ... >> 1584 bytes read in 68 ms (22.5 KiB/s) >> uboot_overlays: loading /lib/firmware/BB-HDMI-TDA998x-00A0.dtbo ... >> 4915 bytes read in 191 ms (24.4 KiB/s) >> loading /boot/initrd.img-4.19.94-ti-r43 ... >> 3342230 bytes read in 242 ms (13.2 MiB/s) >> debug: [console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 >> root=/dev/mmcblk1p1 ro rootfstype=ext4 rootwait coherent_pool=1M >> net.ifnames=0 quiet] ... >> debug: [bootz 0x82000000 0x88080000:32ff96 88000000] ... >> ## Flattened Device Tree blob at 88000000 >> Booting using the fdt blob at 0x88000000 >> Loading Ramdisk to 8fcd0000, end 8fffff96 ... OK >> Loading Device Tree to 8fc5d000, end 8fccffff ... OK >> >> *SD card present* >> >> U-Boot SPL 2019.04-00002-gc9b3922522 (Aug 24 2020 - 16:42:18 -0500) >> Trying to boot from MMC2 >> Loading Environment from EXT4... ** File not found /boot/uboot.env ** >> >> ** Unable to read "/boot/uboot.env" from mmc0:1 ** >> >> >> U-Boot 2019.04-00002-gc9b3922522 (Aug 24 2020 - 16:42:18 -0500), Build: >> jenkins-github_Bootloader-Builder-144 >> >> CPU : AM335X-GP rev 2.1 >> I2C: ready >> DRAM: 512 MiB >> No match for driver 'omap_hsmmc' >> No match for driver 'omap_hsmmc' >> Some drivers were not found >> Reset Source: Power-on reset has occurred. >> RTC 32KCLK Source: External. >> MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 >> Loading Environment from EXT4... ** File not found /boot/uboot.env ** >> >> ** Unable to read "/boot/uboot.env" from mmc0:1 ** >> Board: BeagleBone Black >> <ethaddr> not set. Validating first E-fuse MAC >> BeagleBone Black: >> BeagleBone Cape EEPROM: no EEPROM at address: 0x54 >> BeagleBone Cape EEPROM: no EEPROM at address: 0x55 >> BeagleBone Cape EEPROM: no EEPROM at address: 0x56 >> BeagleBone Cape EEPROM: no EEPROM at address: 0x57 >> Net: eth0: MII MODE >> cpsw, usb_ether >> Press SPACE to abort autoboot in 0 seconds >> board_name=[A335BNLT] ... >> board_rev=[] ... >> switch to partitions #0, OK >> mmc0 is current device >> SD/MMC found on device 0 >> switch to partitions #0, OK >> mmc0 is current device >> Scanning mmc 0:1... >> gpio: pin 56 (gpio 56) value is 0 >> gpio: pin 55 (gpio 55) value is 0 >> gpio: pin 54 (gpio 54) value is 0 >> gpio: pin 53 (gpio 53) value is 1 >> switch to partitions #0, OK >> mmc0 is current device >> gpio: pin 54 (gpio 54) value is 1 >> Checking for: /uEnv.txt ... >> Checking for: /boot.scr ... >> Checking for: /boot/boot.scr ... >> Checking for: /boot/uEnv.txt ... >> gpio: pin 55 (gpio 55) value is 1 >> 1054 bytes read in 34 ms (30.3 KiB/s) >> Loaded environment from /boot/uEnv.txt >> debug: [dtb=xxxx.dtb] ... >> Using: dtb=xxxx.dtb ... >> Checking if uname_r is set in /boot/uEnv.txt... >> gpio: pin 56 (gpio 56) value is 1 >> Running uname_boot ... >> loading /boot/vmlinuz-4.19.94-ti-r43 ... >> 10097528 bytes read in 665 ms (14.5 MiB/s) >> debug: [enable_uboot_overlays=1] ... >> debug: [enable_uboot_cape_universal=1] ... >> debug: [uboot_base_dtb_univ=am335x-boneblack-uboot-univ.dtb] ... >> uboot_overlays: [uboot_base_dtb=am335x-boneblack-uboot-univ.dtb] ... >> uboot_overlays: Switching too: dtb=am335x-boneblack-uboot-univ.dtb ... >> loading /boot/dtbs/4.19.94-ti-r43/am335x-boneblack-uboot-univ.dtb ... >> 60334 bytes read in 55 ms (1 MiB/s) >> uboot_overlays: [fdt_buffer=0x60000] ... >> uboot_overlays: loading /lib/firmware/BB-ADC-00A0.dtbo ... >> 867 bytes read in 310 ms (2 KiB/s) >> uboot_overlays: loading /lib/firmware/BB-BONE-eMMC1-01-00A0.dtbo ... >> 1584 bytes read in 210 ms (6.8 KiB/s) >> uboot_overlays: loading /lib/firmware/BB-HDMI-TDA998x-00A0.dtbo ... >> 4915 bytes read in 59 ms (81.1 KiB/s) >> loading /boot/initrd.img-4.19.94-ti-r43 ... >> 3342230 bytes read in 235 ms (13.6 MiB/s) >> debug: [console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 >> root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M >> net.ifnames=0 quiet] ... >> debug: [bootz 0x82000000 0x88080000:32ff96 88000000] ... >> ## Flattened Device Tree blob at 88000000 >> Booting using the fdt blob at 0x88000000 >> Loading Ramdisk to 8fcd0000, end 8fffff96 ... OK >> Loading Device Tree to 8fc5d000, end 8fccffff ... OK >> >> Thanks in advance, >> Ryan >> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/af23e9ce-6d99-4c57-86d2-3b320ad3bd9bn%40googlegroups.com.
