Agx orin custom board HDMI didn't work

[jakelin]

Jetpack: 5.0.2
SOM board: agx orin 32gb
Board ID(3701) version(500) sku(0004) revision(F.0)

my steps:

1. download hdmi dtsi from
   tegra234-dcb-p3701-0000-a02-p3737-0000-a01_hdmi.dtsi

2. in the tegra234-p3701-0004-p3737-0000.dts :
   //#include “tegra234-dcb-p3701-0000-a02-p3737-0000-a01.dtsi”
   #include “tegra234-dcb-p3701-0000-a02-p3737-0000-a01_hdmi.dtsi”
   and HPD gpio

display@13800000 {
os_gpio_hotplug_a = <&tegra_main_gpio TEGRA234_MAIN_GPIO(M, 0) GPIO_ACTIVE_HIGH>;
status = “okay”;
};

3. pinmux setting (as the attachment)
   bootloader/tegra234-mb1-bct-gpio-p3701-0000-a04.dtsi
   bootloader/t186ref/BCT/tegra234-mb1-bct-padvoltage-p3701-0000-a04.dtsi
   bootloader/t186ref/BCT/tegra234-mb1-bct-pinmux-p3701-0000-a04.dtsi
   tegra234-mb1-bct-gpio-p3701-0000-a04.dtsi (2.5 KB)
   tegra234-mb1-bct-padvoltage-p3701-0000-a04.dtsi (1.4 KB)
   tegra234-mb1-bct-pinmux-p3701-0000-a04.dtsi (64.6 KB)

4. HDMI schematics
   

   
   
   
   
   
   
   

5. boot message:
   orin_hdmi_1012-1.log (62.0 KB)

ai@tegra-ubuntu:~$ export DISPLAY=:0
ai@tegra-ubuntu:~$ xrandr
No protocol specified
Can’t open display :0

7. in the MB2 phase I can see the UEFI screen and NVIDIA logo, but after starting kernel the screen was no longer display.

Thanks!

[WayneWWW]

Please check the design guide and see if you are using correct design. The lane 0 and lane2 order on HDMI is different from DP case.

[jakelin]

Hi WayneWWW,

when I compiled and make install the kernel source,
the modules.dep will be replaced and loss the depend settings for nvidia.ko, nvidia-modeset.ko, nvidia-drm.ko
and I added this patch manually, the display worked.

Linux_for_Tegra/rootfs/lib/modules/5.10.104-tegra

— modules.dep.bak 2022-10-18 11:33:53.435644893 +0800
+++ modules.dep 2022-10-18 11:36:06.842106043 +0800
@@ -1092,3 +1092,6 @@
kernel/net/mac80211/mac80211.ko: kernel/net/wireless/cfg80211.ko
kernel/net/nfc/nfc.ko:
kernel/net/nfc/nci/nci.ko: kernel/net/nfc/nfc.ko
+extra/opensrc-disp/nvidia-modeset.ko: extra/opensrc-disp/nvidia.ko
+extra/opensrc-disp/nvidia-drm.ko: extra/opensrc-disp/nvidia-modeset.ko extra/opensrc-disp/nvidia.ko
+extra/opensrc-disp/nvidia.ko:

[WayneWWW]

Hi @jakelin

I feel the need of your patch is due to the method to build kernel. Could you share the steps you are running to build kernel and install modules?

[jakelin]

Hi @WayneWWW

my steps:

at the sources folder

make -C kernel/kernel-5.10/ ARCH=arm64 O=$TEGRA_KERNEL_OUT LOCALVERSION=-tegra CROSS_COMPILE=${TOOLCHAIN_PREFIX} tegra_defconfig

make -C kernel/kernel-5.10/ ARCH=arm64 O=$TEGRA_KERNEL_OUT LOCALVERSION=-tegra CROSS_COMPILE=${TOOLCHAIN_PREFIX} menuconfig

make -C kernel/kernel-5.10/ ARCH=arm64 O=$TEGRA_KERNEL_OUT LOCALVERSION=-tegra CROSS_COMPILE=${TOOLCHAIN_PREFIX} -j$(nproc) Image
make -C kernel/kernel-5.10/ ARCH=arm64 O=$TEGRA_KERNEL_OUT LOCALVERSION=-tegra CROSS_COMPILE=${TOOLCHAIN_PREFIX} -j$(nproc) dtbs
make -C kernel/kernel-5.10/ ARCH=arm64 O=$TEGRA_KERNEL_OUT LOCALVERSION=-tegra CROSS_COMPILE=${TOOLCHAIN_PREFIX} -j$(nproc) modules
make -C kernel/kernel-5.10/ ARCH=arm64 O=$TEGRA_KERNEL_OUT LOCALVERSION=-tegra INSTALL_MOD_PATH=$KERNEL_MODULES_OUT modules_install

at the Linux_for_Tegra folder

cp -rfv $JETSON_AGX_ORIN_KERNEL_SOURCES/build/arch/arm64/boot/Image kernel/
cp -rfv $JETSON_AGX_ORIN_KERNEL_SOURCES/build/arch/arm64/boot/dts/nvidia/* kernel/dtb/
sudo cp -arfv $JETSON_AGX_ORIN_KERNEL_SOURCES/modules/lib rootfs/usr/

[WayneWWW]

Hi,

It looks like the need of your patch is due to running menuconfig.

I skipped this step and turned out modules.dep does not need any patch to have nvidia.ko …etc.

[jakelin]

Hi WayneWWW,

ActuaIly, I also skipped the menuconfig, because I don’t need to modify it now,
then as the result of this issue , the modules.dep still not has display driver dependency.

Finally,
I tried to copy the “extra” folder which including “nvidia-modeset.ko”, “nvidia-drm.ko”, “nvidia.ko” into “sources/modules/lib/modules/5.10.104-tegra”
and make modules_install again,
the modles.dep updated these 3 .ko files successfully.
Is it a better way?

[WayneWWW]

@jakelin

Finally,
I tried to copy the “extra” folder which including “nvidia-modeset.ko”, “nvidia-drm.ko”, “nvidia.ko” into “sources/modules/lib/modules/5.10.104-tegra”
and make modules_install again,
the modles.dep updated these 3 .ko files successfully.
Is it a better way?

Yes, I think that is needed.