[alpha] Android 13 for Odroid C4 with mainline kernel 5.15

[joerg]

The first release of my Android build:
https://www.dropbox.com/s/zw01i8copmqt3 ... ar.gz?dl=0

It's a first version and it remains a lot of work to make it more complete and eliminate some errors.

At init process of Android the userdata partition will resize to maximum free space. On my 16GB emmc I have >12GB free space.

Works:
- audio over hdmi, over s/pdif, over usb, over bluetooth
- gpiomem and wiringPi
- logo is shown, but only for some seconds
- wifi dongle rtl8192eu based
- rooting with Magisk, but version 24.x, not 25.x

Doesn't work, or wip:
- devicetree overlays
- wifi dongles rtl8811au, rtl8188eu based, like Odroid or Edimax, and others maybe...
- gps
- spi, pwm, onewire

A lot of things are not tested:
- google apps
- video
- etc
.

Screenshot_20230129-145448.png (102.55 KiB) Viewed 28 times

[joerg]

HowTo Section

Install to emmc card (only!):
Be sure which device is your emmc card!

Code: Select all

#dd if=Android13-20230129-odroidc4.img of=/dev/sdX bs=1M
#sync

Or use other flashing tool.

Install Magisk:
https://github.com/topjohnwu/Magisk/rel ... -v24.3.apk

Code: Select all

adb shell
#su
#dd if=/dev/block/by-name/boot of=boot.img 
//In Magisk Manager use patch file method...
#dd if=magisk_patched-24300_xxxx.img of=/dev/block/by-name/boot
#reboot

[odroid]

Nice to meet UpsideDownCake on a modern Kernel 5.15

[rooted]

Your work never ceases to amaze me.

[voodik]

Great!
Can i know which mali, gralloc and hwcomposer modules you use ?

[joerg]

Hello voodik, I used the configuration from https://source.android.com/docs/setup/c ... m3l_boards, specially from VIM3L as this board has the same cpu architecture meson-sm1.
BTW. a lot is not working yet. I am searching for USB Bluetooth solution. Android 13 has now Gabeldorsche as Bluetooth stack and it lacks of well documentation...
More things are not working:
MTP device, USB configuration wrong
HDMI-CEC, does bootloop when is included in image.
HDMI or S/PDIF audio does not work, but USB audio yes

I was wondering that the graphics stack is working out of the box:
Gralloc is delivered with the yukawa device repo: device/amlogic/yukawa/hal/gralloc.
Midgard Mali is from kernel source: drivers/gpu/arm/midgard
Kernel sources are cloned from: git clone https://android.googlesource.com/kernel/hikey-linaro -b android-amlogic-bmeson-5.15 with the meson_defconfig and the meson-sm1-odroid-c4.dtb.
Hwcomposer is delivered with android sources in: external/drm_hwcomposer and added as hwcomposer.drm_meson

[joerg]

I made a step forward with Bluetooth. I copied the firmware of my Asus dongle, rtl8761 based, to wrong folder. Now I can enable the Bluetooth and I can find my JBL headphones, can pair, but no sound.
And I have this: servicemanager: Could not find android.hardware.bluetooth.IBluetoothHci/default in the VINTF manifest.. I tried already to add it to manifest.xml...

[edit]
It works! I had to pair the JBL LIVE460NC with headphone symbol, not the JBL LIVE460NC-LE LowEnergy!

[joerg]

Now the MTP file access over the otg port is working.
It was a wrong symlink in the Android sources in system/core/rootdir/init.usb.configfs.rc
Must be:
symlink /config/usb_gadget/g1/functions/ffs.mtp /config/usb_gadget/g1/configs/b.1/f1
But was:
symlink /config/usb_gadget/g1/functions/mtp.gs0 /config/usb_gadget/g1/configs/b.1/f1
As the old form is not any more present in modern kernel. There is missing f_mtd.c and config CONFIG_USB_CONFIGFS_F_MTP
I also changed the vid pid to Nexus/Pixel. After reboot my LinuxMint didn't mount the odroid-c4 and I had to change the udev rules in 51-android.rules for it to:

Code: Select all

ATTR{idProduct}=="4ee1", ENV{adb_adbfast}="yes", SYMLINK+="libmtp-%k"
ATTR{idProduct}=="4ee2", ENV{adb_adbfast}="yes", SYMLINK+="libmtp-%k"

I have searched too much time for all this.
Now I would like to make some install makefile to generate the GPT partition table, flash the meson mainline u-boot and all the other images as boot.img, super.img etc directly to emmc.

[voodik]

Now the MTP file access over the otg port is working.
It was a wrong symlink in the Android sources in system/core/rootdir/init.usb.configfs.rc
Must be:
symlink /config/usb_gadget/g1/functions/ffs.mtp /config/usb_gadget/g1/configs/b.1/f1
But was:
symlink /config/usb_gadget/g1/functions/mtp.gs0 /config/usb_gadget/g1/configs/b.1/f1
As the old form is not any more present in modern kernel. There is missing f_mtd.c and config CONFIG_USB_CONFIGFS_F_MTP
I also changed the vid pid to Nexus/Pixel. After reboot my LinuxMint didn't mount the odroid-c4 and I had to change the udev rules in 51-android.rules for it to:

Code: Select all

ATTR{idProduct}=="4ee1", ENV{adb_adbfast}="yes", SYMLINK+="libmtp-%k"
ATTR{idProduct}=="4ee2", ENV{adb_adbfast}="yes", SYMLINK+="libmtp-%k"

I have searched too much time for all this.
Now I would like to make some install makefile to generate the GPT partition table, flash the meson mainline u-boot and all the other images as boot.img, super.img etc directly to emmc.

What about video hw decode/encode ?
I working on almost same for N2, but for now just hdmi output is working ))) no audio, no decoders etc)

n2-5.10.png (73.85 KiB) Viewed 210 times

[joerg]

As always I appreciate your work.
I never came in touch with video hw decode/encode. Pls tell me what and how I need to test for it?

[voodik]

As always I appreciate your work.
I never came in touch with video hw decode/encode. Pls tell me what and how I need to test for it?

Nothing))
Only software decoders/encoders are listed
https://android.googlesource.com/device ... codecs.xml

[joerg]

I found the right setting for getting hdmi audio working!
Mixer paths have been wrong, must be (mixer_paths_hdmi_only.xml):

Code: Select all

<?xml version="1.0" encoding="ISO-8859-1"?>
<mixer>
	<!-- FIXME: This should be moved to the appropriate path -->

	<!-- Enable HDMITX Control from TDM A -->
	<ctl name="TOHDMITX Switch" value="1" />
	<ctl name="TOHDMITX I2S SRC" value="I2S B" />

	<!-- PCM0 to TDMB -->
	<ctl name="TDMOUT_B SRC SEL" value="IN 0" />
	<ctl name="FRDDR_A SINK 1 SEL" value="OUT 1" />
	<ctl name="FRDDR_A SRC 1 EN Switch" value="1" />
</mixer>

ctl name="FRDDR_A SINK 1 SEL" value="OUT 1" and ctl name="TOHDMITX I2S SRC" value="I2S B" did the trick.

Now I am searching solution for S/PDIF out. I need it for my All-In-One PC in living room connected to the Onkyo amplifier.

[joerg]

Sound over S/PDIF also working!
I had to patch the device tree to add spdifout node and add this line to mixer paths xml:

Code: Select all

	<ctl name="FRDDR_A SINK 3 SEL" value="OUT 3" />
	<ctl name="FRDDR_A SRC 3 EN Switch" value="1" />

This results in sound output at both hdmi and s/pdif connector.

[joerg]

Now I managed also making wiringPi working and using with my app.
The libraries can't longer be on vendor partition at /vendor/lib64. They must be on system partition and library name must be added to public.libraries.txt also on system partition.

BTW. I was not yet able to make a functional install script.
The manual installation process is somehow complicated:
-Flash mainline u-boot to emmc.
-Boot up Odroid C4 to fastboot.
-Command fastboot oem format to make the GPT partition table and the 10 partitions.
-For partitions boot, super, cache, recovery, dtbo, userdata, odm command fastboot flash ....
-Primary GPT header resides at the same address range as u-boot. Need to remove the emmc and flash u-boot again.
-Now primary GPT isn't there anymore. U-boot is patched to accept the backup GPT header.
-Put emmc again and boot up Android.

My script should do this all, but in the way not to use u-boot with fastboot to make and flash the partitions. Ready to put the emmc to the C4 to boot up.
I can make the partitions and write the images to a loop device. But when I try to flash the emmc with this created whole image and flash afterwards u-boot, u-boot boots up, but the kernel is not found.
If I flash u-boot before to the loop device and flash all to emmc, it does not boot up u-boot.

[joerg]

I make progress with my script to flash whole Android image included u-boot to emmc. But I need to figure out, how to resize the userdata partition at first start.
I have some options: Use u-boot, use recovery or use Android init process.
Once I am ready with it, I would like to publish the image, so others could give it a try.
What would be the best and free file host service for this about 1GB image?

[rooted]

@mdrjr will provide you with the necessary storage I bet, or even Hardkernel

[joerg]

I have ready a first image that can be flashed to emmc. If someone like to try it out, stay tuned. Need to upload it to a file host service...

[voodik]

I have ready a first image that can be flashed to emmc. If someone like to try it out, stay tuned. Need to upload it to a file host service...

Google drive?))

[joerg]

Dropbox, pls see first post.