Hi Bin

Further to previous, I have built the latest u-boot source from git.denx.de but, when I flash this version, it fails to boot the kernel. Here are the debug traces.

The working u-Boot:-

U-Boot 2019.01-dirty (Jan 29 2019 - 08:17:16 -0800)

TEGRA186 Model: NVIDIA P2771-0000-500 DRAM: 7.8 GiB MC: Tegra SD/MMC: 0, Tegra SD/MMC: 1 *** Warning - bad CRC, using default environment

In: serial Out: serial Err: serial Net: eth0: ethernet@2490000 Hit any key to stop autoboot: 0 Tegra186 (P2771-0000-500) # boot MMC: no card present switch to partitions #0, OK mmc0(part 0) is current device Scanning mmc 0:1... Found /boot/extlinux/extlinux.conf Retrieving file: /boot/extlinux/extlinux.conf 213 bytes read in 90 ms (2 KiB/s) p2771-0000 eMMC boot options 1: primary kernel Enter choice: 1: primary kernel Retrieving file: /boot/Image 20727600 bytes read in 546 ms (36.2 MiB/s) append: root=/dev/mmcblk0p1 rw rootwait console=ttyS0,115200n8 console=tty0 OS=l4t fbcon=map:0 net.ifnames=0 memtype=0 video=tegrafb no_console_suspend=1 earlycon=uart8250,mmio32,0x03100000 nvdumper_reserved=0x2772e0000 gpt tegra_fbmem2=0x140000@0x969ee000 lut_mem2=0x2008@0x969eb000 tegraid=18.1.2.0.0 tegra_keep_boot_clocks maxcpus=6 boot.slot_suffix= boot.ratchetvalues=0.2.1 androidboot.serialno=0422518026482 bl_prof_dataptr=0x10000@0x277040000 sdhci_tegra.en_boot_part_access=1 root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 ## Flattened Device Tree blob at 92000000 Booting using the fdt blob at 0x92000000 reserving fdt memory region: addr=80000000 size=10000 Using Device Tree in place at 0000000092000000, end 0000000092049273

Starting kernel ...

[ 0.000000] Booting Linux on physical CPU 0x100 [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Initializing cgroup subsys cpuacct [ 0.000000] Linux version 4.4.38-tegra (buildbrain@mobile-u64-773) (gcc version 4.8.5 (GCC) ) #1 SMP PREEMPT Thu May 17 00:15:19 PDT 2018

and the non-working u-boot:-

U-Boot 2019.01 (Jan 30 2019 - 17:38:42 +0000)

TEGRA186 Model: NVIDIA P2771-0000-500 DRAM: 7.8 GiB MMC: sdhci@3400000: 1, sdhci@3460000: 0 Loading Environment from MMC... *** Warning - bad CRC, using default environment

In: serial Out: serial Err: serial Net: eth0: ethernet@2490000 Hit any key to stop autoboot: 0 MMC: no card present switch to partitions #0, OK mmc0(part 0) is current device Scanning mmc 0:1... Found /boot/extlinux/extlinux.conf Retrieving file: /boot/extlinux/extlinux.conf 213 bytes read in 2 ms (103.5 KiB/s) p2771-0000 eMMC boot options 1: primary kernel Enter choice: 1: primary kernel Retrieving file: /boot/Image 20727600 bytes read in 509 ms (38.8 MiB/s) append: root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 ## Flattened Device Tree blob at 92000000 Booting using the fdt blob at 0x92000000 Using Device Tree in place at 0000000092000000, end 0000000092049273

Starting kernel ...

Any ideas?

- David

On 2019-01-29 13:46, DJM-Avalesta wrote:

Hi Bin.

I am trying to build and load u-boot at the moment (just the same version as I already have) but I keep breaking the system. When I can build and overwrite u-boot, I will try a more recent version of the u-boot source, but I worry that there may be NVidia-Jetson-specific code in the current version of u-boot.

Many thanks David

On 2019-01-29 02:49, Bin Meng wrote: Hi,

On Tue, Jan 29, 2019 at 1:32 AM DJM-Avalesta david.myers@avalesta.com wrote: Dear Bin Meng,

I have a version of U-Boot, on my Jetson TX2 hardware, which does not support USB 3.0.

U-Boot 2016.07-g9c3b9a4

(May 17 2018 - 00:08:48 -0700)

Can you please use latest U-Boot instead? That will be much easier.

Is it possible to apply one or more of your patches to this version to implement support for USB 3.0?

Technically it's doable.

Many thanks for your help.

Regards, Bin