[How to patch U-boot ?]

Thanks for the tip. The point is : I would like to make change to the U-boot ( /home/hanguofu/Build-Armbian/cache/sources/u-boot-aml-s9xxx)  instead of kernel ( /home/hanguofu/Build-Armbian/cache/sources/LINUX_DEFAULT/20180925 ).

 

How to tell the tool to patch U-boot instead of the kernel please  ? I didnot find out such an option or compile switch.

[How to patch U-boot ?]

I run Armbian tool ( checked out from  https://github.com/150balbes/Build-Armbian  )with command  ./compile.sh   CREATE_PATCHES="yes"  , but only see the request for patch the kernel :

 

[ warn ] Make your changes in this directory: [ /home/hanguofu/Build-Armbian/cache/sources/LINUX_DEFAULT/20180925 ]
[ warn ] Press <Enter> after you are done [ waiting ]  

 

I would like to patch the U-boot ( u-boot-aml-s9xxx  ) instead of kernel . Should I manually add the patch to the userpatches/u-boot   directory  for my aml-s9xxx board ?

[Is it safe to update kernel while Armbian is running ?]

I installed Armbian_5.60_Aml-s9xxx_Ubuntu_xenial_default_4.18.7  to the EMMC of my s905x TV Box , so far so good . 
Yesterday I trimmed some drivers and built the kernel successfully . The following packages are generated with armbian build tool :

 

 linux-dtb-aml-s9xxx_5.60_arm64.deb
 linux-headers-aml-s9xxx_5.60_arm64.deb
 linux-libc-dev-aml-s9xxx_5.60_arm64.deb
 linux-image-aml-s9xxx_5.60_arm64.deb
 linux-source-default-aml-s9xxx_5.60_all.deb

 

I am going to ssh into my box and run "dpkg -i  " commands  to update kernel . Is it safe to do so while Armbian is running ?

[Armbian for Amlogic S9xxx kernel 5.x]

I put the img. Armbian_5.59_Aml-s9xxx_Ubuntu_xenial_default_4.18.0_20180823.img  into a usb disc. and boot it successfully with my TV box.

 

I havenot flashed the emmc yet . Another word , I played with Armbian installed at the U-disc. However , when I tried to upload/download files to/from the box with tool "Xftp 5"  ( from NetSarang ) , the tool failed to connected to the box. The box and my pc are in the same local network ( 192.168.0.xxx )

 

Of course , the ssh service is good and I can log into the box with  tool "Xshell 5". Is the ftp service not avail. at the img. ?

[Please give me a list of toolchains to build armbian]

I am trying to build 150balbes/Build-Armbian  at my Ubuntu18 PC . However , the download process of toolchains are very slow.

I had already spent most of the day in it. Unfortunatly , some of the toolchains was downloaded with warnings :

[ warn ] Verification failed

 

Could you please tell me the list of all needed toolchains and its source ? I will try to downlaod them in another way.

 

Thanks !

 

Guofu Han

[How to disable serial console at U-boot for s905 ?]

Since there is a well-known security issue at s905(x) SOCs : 

https://fredericb.info/2016/10/amlogic-s905-soc-bypassing-not-so.html

 

Is it possible to disable serial console at s905 u-boot ? Does the setting at device tree apply to kernel only or both kernel and u-boot drivers ?

 

 

Regards !

 

Guofu Han

 

 

[Is there any alternative to ssh/dropbear passphrase for LUKS unlock ?]

I am referring to s905(x) series SOCs. Is it possible to create  a cryptpasswd at  encrypted OTP  and use it to  unlock root file system on boot ?

If not , is it possible to use  a security chipset such as   ATSHA204  /  DX81C04  /  ZW30I8 / SMEC98SP  to feed s905(x) the key ?

 

 

Regards !

 

GuoFu Han

[ARMBIAN for Amlogic S905 and S905X (ver 5.44 =<)]

On ‎7‎/‎5‎/‎2018 at 1:51 PM, Reddwarf said:

If you cross compile, why bother with an interpreter, why not compile for arm64 and run it natively?

Yes . You are right . I did not notice s905x is a 64-bit SOC.

Cheer ~~~

[ARMBIAN for Amlogic S905 and S905X (ver 5.44 =<)]

arch ( ARM or ARM64 ) problem :

 

Hi , All :

 

I installed Armbian_5.41.1_S9xxx_Ubuntu_xenial_3.14.29_mate_20180421.img at the SD card for my s905x TV box and it seems O.K.

Now I tried to cross compile an application at my Ubuntu PC for this lovely device. The first problem I encountered is the choice of arch.

I worked out a 32-bit arm application ( target arch : ARM) with the cross compile tool . The generated binary is :

hello-world : ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 3.2.0, not stripped
Unfortunately , I did not find the needed interpreter at the tv box . The only interpreter I found at the  img at the SD card is :

/lib/ld-linux-aarch64.so.1 -> aarch64-linux-gnu/ld-2.23.so
 

Does it mean that the img is for ARM64 arch ? Is there a ld-linux-armhf  interpreter at the image ?

 

[ARMBIAN for Amlogic S905 and S905X (ver 5.44 =<)]

1 minute ago, Reddwarf said:

Do I understand correctly that your monitor does not have hdmi-input? If you have DVI or VGA you can get an adapter hdmi->DVI or hdmi->VGA.

Yes . You got it . I only have a traditional tv set with cvbs ( composite or AV ) input and a computer monitor with VGA input.

[ARMBIAN for Amlogic S905 and S905X (ver 5.44 =<)]

Sorry for my question if it had been asked : is there any Ubuntu img available for MXQ PRO+ 4K ( s905x , 2G/16G )  with cvbs compatibility  ?

 

I donot have a hdmi monitor and I would like to try Ubuntu on my tv box. I tried multi-boot with Armbian_5.44_S9xxx_Ubuntu_xenial_3.14.29_server_20180515.img  at my sd card , but there is no av ( cvbs ) output at all. I am not sure if the dtb.img is suitable for my tv box ( I tried several dtb files ) or the armbian Ubuntu img does not support cvsb output at all ? 

[Is it possible to port webrtc to Allwinner H3 ?]

I think webrtc is a very interesting feature for such devices. Unfortunately , I only saw a drive ( UV4L  :  https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=105019)  for Raspberry Pi2/Pi3 in linux. 

 

Does somebody here have any idea to cross-compile native webrtc source code for such a device ?

 

Regards !

 

 

GuoFu Han