GmP

First of all, thank you to  @Hqnicolas and all the members for this great effort.
 
Just bought an H96 rk3566, having this hardware configuration:
BOARD LABEL: HCY-RK3566-1X32-V20 2023-01-13
SOC RK3566
PMIC RK809-5
LAN RTL8211F
DISPLAY FD6551
WIFI AIC8800D40
eMMC H26M74002HMR - SK Hynix eMMC 5.1 NAND Flash 64Gb.
 
 
It seems to be a mix of the other versions described in this topic, although very close to the one of @WINEDS (thanks for the hints).  
Everything seems to work so far.
Installed using rockchip dev tools, as advised.
 
here its:
    _             _    _                                         _ _        
   /_\  _ _ _ __ | |__(_)__ _ _ _    __ ___ _ __  _ __ _  _ _ _ (_) |_ _  _ 
  / _ \| '_| '  \| '_ \ / _` | ' \  / _/ _ \ '  \| '  \ || | ' \| |  _| || |
 /_/ \_\_| |_|_|_|_.__/_\__,_|_||_|_\__\___/_|_|_|_|_|_\_,_|_||_|_|\__|\_, |
                                 |___|                                 |__/ 
 v26.2 rolling for h96-tvbox-3566 running Armbian Linux 6.12.61-current-rockchip64
 Packages:     Debian stable (trixie)
 Support:      for advanced users (rolling release)
 IPv4:         (LAN) 192.168.111.228, 192.168.111.91 (WAN) xxxxxxxxxxx 
 Containers:   big-bear-photoprism-db
 Performance:  
 Load:         8%                Uptime:       46 minutes    
 Memory usage: 6% of 7.50G      
 CPU temp:     38°C                Usage of /:   31% of 57G       
 
 
 
To enable Bluetooth I have used this small overlay in  /boot/overlay-user/ (which enables SPDIF as well):
/dts-v1/; /plugin/; /* &{/serial@fe650000} */ &uart1 { status = "okay"; dma-names = "tx\0rx"; bluetooth { status = "disabled"; }; }; &spdif { clock-names = "mclk\0hclk"; status="okay"; };  
The followings are the drivers used for wifi-bluetooth
wget https://github.com/radxa-pkg/aic8800/releases/download/4.0%2Bgit20250410.b99ca8b6-3/aic8800-firmware_4.0+git20250410.b99ca8b6-3_all.deb wget https://github.com/radxa-pkg/aic8800/releases/download/4.0%2Bgit20250410.b99ca8b6-3/aic8800-sdio-dkms_4.0+git20250410.b99ca8b6-3_all.deb dpkg -i aic8800-firmware_4.0+git20250410.b99ca8b6-3_all.deb dpkg -i aic8800-sdio-dkms_4.0+git20250410.b99ca8b6-3_all.deb  
Service to enable bluetooth :
 
[Unit] Description=Bluetooth HCI Attach (AIC8800) After=systemd-modules-load.service Requires=systemd-modules-load.service After=dev-ttyS1.device Requires=dev-ttyS1.device [Service] Type=oneshot # Load AIC module ExecStartPre=/sbin/modprobe aic8800_btlpm_sdio # Just a small delay ExecStartPre=/bin/sleep 2 # Attach HCI ExecStart=/usr/bin/hciattach -s 1500000 /dev/ttyS1 any 1500000 flow nosleep  
 
To re-enable display in Linux 6.12  another small overlay is required: (the display itself it is not scrolling and available at: /sys/class/leds/display/value )
/dts-v1/; /plugin/; &{/i2c-aux-display} { compatible = "i2c-gpio"; #address-cells = <0x01>; #size-cells = <0x00>; display@24 { compatible = "fdhisi,fd6551"; reg = <0x24>; #address-cells = <0x01>; #size-cells = <0x00>; tm16xx,digits = [04 03 02 01]; tm16xx,segment-mapping = [00 01 02 03 04 05 06]; led@0,0 { reg = <0x00 0x00>; function = "alarm"; }; led@0,1 { reg = <0x00 0x01>; function = "usb"; linux,default-trigger = "usb-host"; }; led@0,2 { reg = <0x00 0x02>; function = "pause"; linux,default-trigger = "mmc2"; }; led@0,3 { reg = <0x00 0x03>; function = "play"; linux,default-trigger = "mmc0"; }; led@0,4 { reg = <0x00 0x04>; function = "colon"; }; led@0,5 { reg = <0x00 0x05>; function = "lan"; linux,default-trigger = "stmmac-0:00:link"; }; led@0,6 { reg = <0x00 0x06>; function = "wlan"; linux,default-trigger = "mmc1"; }; digits { status = "disabled"; }; leds { status = "disabled"; }; }; }; rk3566-bt-fix.dtso rk3566-led-fix.dtso

First of all, thank you to  @Hqnicolas and all the members for this great effort.
 
Just bought an H96 rk3566, having this hardware configuration:
BOARD LABEL: HCY-RK3566-1X32-V20 2023-01-13
SOC RK3566
PMIC RK809-5
LAN RTL8211F
DISPLAY FD6551
WIFI AIC8800D40
eMMC H26M74002HMR - SK Hynix eMMC 5.1 NAND Flash 64Gb.
 
 
It seems to be a mix of the other versions described in this topic, although very close to the one of @WINEDS (thanks for the hints).  
Everything seems to work so far.
Installed using rockchip dev tools, as advised.
 
here its:
    _             _    _                                         _ _        
   /_\  _ _ _ __ | |__(_)__ _ _ _    __ ___ _ __  _ __ _  _ _ _ (_) |_ _  _ 
  / _ \| '_| '  \| '_ \ / _` | ' \  / _/ _ \ '  \| '  \ || | ' \| |  _| || |
 /_/ \_\_| |_|_|_|_.__/_\__,_|_||_|_\__\___/_|_|_|_|_|_\_,_|_||_|_|\__|\_, |
                                 |___|                                 |__/ 
 v26.2 rolling for h96-tvbox-3566 running Armbian Linux 6.12.61-current-rockchip64
 Packages:     Debian stable (trixie)
 Support:      for advanced users (rolling release)
 IPv4:         (LAN) 192.168.111.228, 192.168.111.91 (WAN) xxxxxxxxxxx 
 Containers:   big-bear-photoprism-db
 Performance:  
 Load:         8%                Uptime:       46 minutes    
 Memory usage: 6% of 7.50G      
 CPU temp:     38°C                Usage of /:   31% of 57G       
 
 
 
To enable Bluetooth I have used this small overlay in  /boot/overlay-user/ (which enables SPDIF as well):
/dts-v1/; /plugin/; /* &{/serial@fe650000} */ &uart1 { status = "okay"; dma-names = "tx\0rx"; bluetooth { status = "disabled"; }; }; &spdif { clock-names = "mclk\0hclk"; status="okay"; };  
The followings are the drivers used for wifi-bluetooth
wget https://github.com/radxa-pkg/aic8800/releases/download/4.0%2Bgit20250410.b99ca8b6-3/aic8800-firmware_4.0+git20250410.b99ca8b6-3_all.deb wget https://github.com/radxa-pkg/aic8800/releases/download/4.0%2Bgit20250410.b99ca8b6-3/aic8800-sdio-dkms_4.0+git20250410.b99ca8b6-3_all.deb dpkg -i aic8800-firmware_4.0+git20250410.b99ca8b6-3_all.deb dpkg -i aic8800-sdio-dkms_4.0+git20250410.b99ca8b6-3_all.deb  
Service to enable bluetooth :
 
[Unit] Description=Bluetooth HCI Attach (AIC8800) After=systemd-modules-load.service Requires=systemd-modules-load.service After=dev-ttyS1.device Requires=dev-ttyS1.device [Service] Type=oneshot # Load AIC module ExecStartPre=/sbin/modprobe aic8800_btlpm_sdio # Just a small delay ExecStartPre=/bin/sleep 2 # Attach HCI ExecStart=/usr/bin/hciattach -s 1500000 /dev/ttyS1 any 1500000 flow nosleep  
 
To re-enable display in Linux 6.12  another small overlay is required: (the display itself it is not scrolling and available at: /sys/class/leds/display/value )
/dts-v1/; /plugin/; &{/i2c-aux-display} { compatible = "i2c-gpio"; #address-cells = <0x01>; #size-cells = <0x00>; display@24 { compatible = "fdhisi,fd6551"; reg = <0x24>; #address-cells = <0x01>; #size-cells = <0x00>; tm16xx,digits = [04 03 02 01]; tm16xx,segment-mapping = [00 01 02 03 04 05 06]; led@0,0 { reg = <0x00 0x00>; function = "alarm"; }; led@0,1 { reg = <0x00 0x01>; function = "usb"; linux,default-trigger = "usb-host"; }; led@0,2 { reg = <0x00 0x02>; function = "pause"; linux,default-trigger = "mmc2"; }; led@0,3 { reg = <0x00 0x03>; function = "play"; linux,default-trigger = "mmc0"; }; led@0,4 { reg = <0x00 0x04>; function = "colon"; }; led@0,5 { reg = <0x00 0x05>; function = "lan"; linux,default-trigger = "stmmac-0:00:link"; }; led@0,6 { reg = <0x00 0x06>; function = "wlan"; linux,default-trigger = "mmc1"; }; digits { status = "disabled"; }; leds { status = "disabled"; }; }; }; rk3566-bt-fix.dtso rk3566-led-fix.dtso

@jock this is the user-overlay patch I am using to enable both leds on the board. The "working" led is as usual a couple of alternating leds of red/blue. The led-ir is a standalone blue, I have triggered one to the "timer" and the other to "activity" , both running.
I can confirm bluetooth, IR remote receiver are also working. Bluetooth needs BCM.hd (I have used BCM43342.hcd).
For the wifi 2/5G the correct overlay is rk3318-box-wlan-ap6334.
HDMI, despite apparently is initialized correctly and answering to all commands still gives a black screen. 
 
rk3318-box-led-overlay-ledA.dtso.txt

Attached the source overlay file for the tm16xx driver. All features working.   See for details and thanks to https://github.com/jefflessard .
rx3318-H50.dtso.txt

Hi, welcome everyone. I’m using an H50 TV box that I was about to throw away because I thought I had completely bricked it.
I disassembled it and found the pins to activate maskrom mode.
I think this could be useful for everyone.
I then installed the current image, and everything seems to work except for the HDMI output (blank screen).
Do you have any suggestions? Thanks. Some data and photo below.
In case you want to install please note that also multitool fails to activate the HDMI, so you will need SSH to config.
 
SOC: RK3188 (Hopefully - I did not remove the heatsink)
eMMC: Samsung KLMBG4GEAC-B001 32GB (64x4)
eMCP: Samsung KMQN10006B 8 GB eMMC + 1 GB LPDDR3 RAM
Wi-Fi IC 339S0209 2.4G/5G
 
LAN working
WIFI Working
 
----------------------------
root@rk3318-box:~# lscpu
Architecture:                aarch64
  CPU op-mode(s):            32-bit, 64-bit
  Byte Order:                Little Endian
CPU(s):                      4
  On-line CPU(s) list:       0-3
Vendor ID:                   ARM
  Model name:                Cortex-A53
    Model:                   4
    Thread(s) per core:      1
    Core(s) per cluster:     4
    Socket(s):               -
    Cluster(s):              1
    Stepping:                r0p4
    CPU(s) scaling MHz:      60%
    CPU max MHz:             1008.0000
    CPU min MHz:             600.0000
    BogoMIPS:                48.00
    Flags:                   fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
Caches (sum of all):
  L1d:                       128 KiB (4 instances)
  L1i:                       128 KiB (4 instances)
  L2:                        256 KiB (1 instance)
NUMA:
  NUMA node(s):              1
  NUMA node0 CPU(s):         0-3
Vulnerabilities:
  Gather data sampling:      Not affected
  Indirect target selection: Not affected
  Itlb multihit:             Not affected
  L1tf:                      Not affected
  Mds:                       Not affected
  Meltdown:                  Not affected
  Mmio stale data:           Not affected
  Reg file data sampling:    Not affected
  Retbleed:                  Not affected
  Spec rstack overflow:      Not affected
  Spec store bypass:         Not affected
  Spectre v1:                Mitigation; __user pointer sanitization
  Spectre v2:                Not affected
  Srbds:                     Not affected
  Tsa:                       Not affected
  Tsx async abort:           Not affected
  Vmscape:                   Not affected
 
root@rk3318-box:~# free -l
               total        used        free      shared  buff/cache   available
Mem:         1504636      291372     1037440       46940      297848     1213264
Low:         1504636      467196     1037440
High:              0           0           0
Swap:         752316           0      752316
 
SOME TESTS ON THE HDMI ISSUE:
hdmi_debug_20251008_230528.log
 
hdmi_test_20251008_230948.log