Jetson TX2 NX R32.7.1: how to update the dtb file

kiwins · June 16, 2022, 8:49am

base on R32.7.1，jetson TX2 NX platform；
when I manually replace my modified dtb file “tegra186-p3636-0001-p3509-0000-a01.dtb” to Linux_for_Tegra/kernel/dtb/, I execute burning：
sudo ./flash.sh -k kernel-dtb jetson-xavier-nx-devkit-tx2-nx mmcblk0p1
Show successful burning

However, the DTB file can be viewed on the board after restart. It is true that the DTB file has not been changed；
so, How to update it correctly？

WayneWWW · June 16, 2022, 9:01am

This kind of question is nothing new. I would suggest you can check the uart log and see where did your dtb load from first. Maybe it is loaded from rootfs but not partition. For this kind of case, then your flash command won’t take effect.

kiwins · June 16, 2022, 10:59am

Thank you for your answer; Sorry，I’m a new user of Jetson；
Now I’m checking that TF card on TX2 NX can’t identify the problem.
Try to modify and burn DTS to verify.
Is there a detailed tutorial to guide which dts file to modify on l4t 32.7.1 and how to update the verification？？

start.log (23.6 KB)
dmesg.log (57.9 KB)

WayneWWW · June 16, 2022, 11:03am

Is there any device tree written in your extlinux.conf? Under /boot.

The method looks correct to me. It is also possible that you put the wrong dtb file. Please check the flash log and see what dtb is flashed to the board.

kiwins · June 16, 2022, 11:35am

The attachment is /boot/extlinux/extlinux.conf

Did I make a mistake at any step？

WayneWWW · June 16, 2022, 11:39am

What is your method to create a new dtb?

linuxdev · June 16, 2022, 2:05pm

Beware that if there is an FDT entry in “/boot/extlinux/extlinux.conf”, then this is where the device tree is loaded from. The partition is used if either (A) there is no FDT entry, or (B) security fuses are burned.

kiwins · June 17, 2022, 2:41am

1、find Linux_for_Tegra/kernel/dtbtegra186-p3636-0001-p3509-0000-a01.dtb
Device tree disassembly：dtc -I dtb -O dts -o tegra186-p3636-0001-p3509-0000-a01.dts tegra186-p3636-0001-p3509-0000-a01.dtb

2、modify the tegra186-p3636-0001-p3509-0000-a01.dts file，then
Compile device tree：dtc -I dts -O dtb -o tegra186-p3636-0001-p3509-0000-a01.dtb tegra186-p3636-0001-p3509-0000-a01.dts

3、Manually copy the tegra186-p3636-0001-p3509-0000-a01.dtb file to /boot at the board end

WayneWWW · June 17, 2022, 2:46am

Hi,

If you use such way to build device tree, then we cannot know whether the device tree is updated or not by reading dmesg.

You need to at least modify the device tree name from this to another string.

[ 0.161011] DTS File Name: /dvs/git/dirty/git-master_linux/kernel/kernel-4.9/arch/arm64/boot/dts/…/…/…/…/…/…/hardware/nvidia/platform/t18x/lanai/kernel-dts/tegra186-p3636-0001-p3509-0000-a01.dts

3、Manually copy the dtb -o tegra186-p3636-0001-p3509-0000-a01.dtb file to /boot at the board end

This step is not needed. Your original method which copy to Linux_for_Tegra/kernel/dtb and run flash.sh is correct.

kiwins · June 21, 2022, 12:11pm

um@tegra-ubuntu:~$ sudo cat /sys/kernel/debug/gpio
gpiochip2: GPIOs 248-255, parent: platform/max77620-gpio, max77620-gpio, can sleep:
gpio-253 ( |spmic_gpio_input ) in hi
gpio-254 ( |spmic_gpio_input ) in hi

gpiochip1: GPIOs 256-319, parent: platform/c2f0000.gpio, tegra-gpio-aon:
gpio-278 ( |vdd-sdmmc3-sw ) out lo
gpio-302 ( |eqos_phy_reset ) out hi
gpio-312 ( |power-key ) in hi

I have a problem now：gpio-278 is 的SDIO_VDD_EN pin，No matter how configured, it cannot be raised.

um@tegra-ubuntu:~$ dmesg | grep mmc1
[ 0.501231] vddio-sdmmc1: 1800 <–> 3300 mV at 3300 mV
[ 1.497610] mmc1: SDHCI controller on 3440000.sdhci [3440000.sdhci] using ADMA 64-bit with 64 bit addr
[ 1.837859] mmc1: hw tuning done …
[ 1.837910] mmc1: new ultra high speed SDR104 SDXC card at address aaaa
[ 1.838203] mmcblk1: mmc1:aaaa SC64G 59.5 GiB
[ 25.015333] mmc1: card aaaa removed
[ 26.294441] mmc1: hw tuning done …
[ 26.294474] mmc1: new ultra high speed SDR104 SDXC card at address aaaa
[ 26.294800] mmcblk1: mmc1:aaaa SC64G 59.5 GiB
[ 31.818286] vddio-sdmmc1: disabling
[ 43.759322] mmc1: card aaaa removed
[ 46.299240] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 46.305335] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 46.311376] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 46.317398] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 46.323462] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 46.329654] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 46.335716] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 46.341755] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 46.347820] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 46.354224] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 47.411455] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 47.417655] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 47.423834] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 47.430039] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 47.436286] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 47.442491] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 47.448823] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 47.455003] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 47.461186] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 47.467514] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 48.527653] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 48.534034] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 48.540375] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 48.546715] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 48.553034] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 48.559393] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 48.565797] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 48.572142] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 48.578542] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 48.584922] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 49.644405] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 49.651438] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 49.658361] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 49.665417] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 49.672390] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 49.679314] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 49.686369] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 49.693292] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 49.700197] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 49.707161] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 156.271242] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 156.277329] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 156.283369] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 156.289398] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 156.295460] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 156.301655] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 156.307849] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 156.313909] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 156.320024] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 156.326205] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 157.383371] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 157.389675] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 157.395865] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 157.402052] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 157.408378] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 157.414558] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 157.420766] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 157.427063] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 157.433266] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 157.439664] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 158.499593] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 158.505937] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 158.512271] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 158.518580] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 158.524908] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 158.531258] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 158.537657] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 158.543982] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 158.550306] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 158.556786] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 159.616404] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 159.623337] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 159.630240] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 159.637154] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 159.644128] mmc1: CMD CRC or end bit error, int mask 0x40000
[ 159.651052] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 159.658036] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 159.665091] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 159.671995] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 159.678959] mmc1: CMD CRC or end bit error, int mask 0x40000

I have referred to many posts, but I still can’t solve them.

Here is my configuration：

sdmmc3: sdhci@3440000 {
cd-gpios = <&tegra_main_gpio TEGRA_MAIN_GPIO(X, 4) 0>;
vmmc-supply = <&p3636_vdd_sdmmc3_sw>;
cd-inverted;
mmc-ocr-mask = <0>;
uhs-mask = <0x8>;
status = “okay”;
sd-uhs-sdr104;
sd-uhs-sdr50;
sd-uhs-sdr25;
sd-uhs-sdr12;
mmc-ddr-1_8v;
mmc-hs200-1_8v;
nvidia,always-on;
/delete-property/ non-removable;
/delete-property/ force-non-removable-rescan;
};

p3636_vdd_sdmmc3_sw:regulator@114 {
compatible = “regulator-fixed”;
reg = <114>;
regulator-name = “vdd-sdmmc3-sw”;
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
gpio = <&tegra_aon_gpio TEGRA_AON_GPIO(V, 6) 0>;
enable-active-high;
};

WayneWWW · June 21, 2022, 12:36pm

Not related to original issue. Please file new topic.

system · July 5, 2022, 12:37pm

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.

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Jetson TX2 NX R32.7.1: how to update the dtb file

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