haven

So on H96Max 3318, the working configuration file for Openvfd is: /etc/modprobe.d/openvfd.conf options openvfd vfd_gpio_clk="4,0x16,0" options openvfd vfd_gpio_dat="4,0x15,0" options openvfd vfd_gpio_stb="0,0,0xFF" options openvfd vfd_chars="0,4,3,2,1" options openvfd vfd_dot_bits="0,1,3,2,4,5,6" #ID Display type #0x03 A display like on the A95X R2 (or the Abox A1 Max). <-- #.2 Reserved - must be 0. #.3 flags #.4 0 - > FD628 and compatible controllers options openvfd vfd_display_type="0x02,0x00,0x00,0x06" But GPIO2_22 (global GPIO86) is claimed by the spi-gpio driver for the Device Tree node i2c-aux-display Device Tree │ └── /i2c-aux-display compatible = "spi-gpio" │ ▼ kernel spi_gpio driver │ ├── GPIO2_19 → SCK ├── GPIO2_22 → MOSI ← GPIO86 is claimed here └── GPIO2_18 → CS i2c-aux-display { compatible = "spi-gpio"; sck-gpios = <... 0x13 ...>; /* GPIO2_19 */ mosi-gpios = <... 0x16 ...>; /* GPIO2_22 */ cs-gpios = <... 0x12 ...>; /* GPIO2_18 */ }; So we have to unbind with: echo i2c-aux-display | sudo tee /sys/bus/platform/drivers/spi_gpio/unbind before 0x15 → GPIO2_21 → unused 0x16 → GPIO2_22 → "mosi" [used] after GPIO2_21 → unused GPIO2_22 → unused we might want to modify the DTS or just unbind it before loading the openvfd module: /lib/systemd/system/openvfd.service [Unit] Description=OpenVFD Service ConditionPathExists=/proc/device-tree/openvfd/ [Service] ExecStart=/bin/sh -c '[ `cat /proc/device-tree/openvfd/compatible` = "open,vfd" ] && echo i2c-aux-display | sudo tee /sys/bus/platform/drivers/spi_gpio/unbind; /sbin/modprobe openvfd; /usr/sbin/OpenVFDService' ExecStop=/bin/kill -TERM $MAINPID ExecStopPost=-/usr/sbin/rmmod openvfd RemainAfterExit=yes [Install] WantedBy=basic.target Attached OpenVfd.c for this box. OpenVFDService.c

Update on a H96 box Rk3318 and openvfd. After disassembly of the original android firmware i have: Controller/display: FD628 Interfaccia: 2-wire CLK: GPIO2_22 = GPIO86 DAT: GPIO2_21 = GPIO85 STB/CS: not used Bit order: MSB first START/STOP: type I²C Android sequence: correctly relpicated H96 Max use a protocol FD628 2-wire H96 Max RK3318 / HS2734C Controller : FD628 Bus : Proprietary 2-wire CLK : GPIO2_22 = GPIO86 DAT : GPIO2_21 = GPIO85 STB/CS : None Bit order : MSB first Digit positions: 0x6E → digit 1 0x6C → digit 2 0x6A → digit 3 0x68 → digit 4 Segments: bit0 = A bit1 = B bit2 = C bit3 = D bit4 = E bit5 = F bit6 = G Verified examples: 1 = 0x06 2 = 0x5B 3 = 0x4F 4 = 0x66 BOOT: b = 0x7C o = 0x5C t = 0x78 ``` Therefore, the GPIO pins, bit order, communication protocol, digit addresses, and segment mapping are now confirmed to be correct. continues..

yes, tried different tv/monitor always with the same problem, solved by disabling video driver in u-boot.

Modified instruction for H96 Max rk3318, with armbian installed to internal emmc (/dev/mmcblk2) kernel 6.60 current git clone --depth=1 --branch=main https://github.com/armbian/build Create patch: ./compile.sh uboot-patch BOARD=rk3318-box BRANCH=current During patch process, modify config: cd build/cache/sources/u-boot-worktree/u-boot/v2024.07/configs sudo nano rk3318-box_defconfig CONFIG_VIDEO=n After creation, move patch: mv build/output/patch/u-boot-rockchip64-current.patch build/patch/u-boot/v2024.07/ Compile u-boot: ./compile.sh uboot ARTIFACT_IGNORE_CACHE=yes BOARD=rk3318-box BRANCH=current Install with dpkg: cd output/debs sudo dpkg -i linux-u-boot-rk3318-box-current_24.11.0-trunk_arm64__2024.07-S3f77-P1c9c-H4674-Vfe58-Bda0a-R448a.deb Flash uboot to boot partition: cd /usr/lib/linux-u-boot-current-rk3318-box/ sudo dd if=idbloader.img of=/dev/mmcblk2 seek=64 conv=notrunc sudo dd if=u-boot.itb of=/dev/mmcblk2 seek=16384 conv=notrunc Done! Reboot and I see a black screen during u-boot.

My emmc was blown out with a power blackout during a flash process active. Very unlucky event.

SOLVED problem with HDMI audio! This was caused by early HDMI detection during u-boot process. Had to recompile u-boot, disabling early video display. See details hereunder.

The HDMI audio problem was a great opportunity to study how HDMI is detected and handled in rk3318 box! Initially I supposed it was a kernel problem and tried with many kernel version 6.1.63 - 6.2 - 6.6.2 - 6.6.39 - 6.6.47 - 6.6.60 (current or edge no matters), with poor results. Then discovered If I boot with HDMI cable disconnected and connect the cable after BOOT (15s after power-up) -> HDMI sound ok This pointed me towards the investigation of the boot process: if HDMI is connected after the u-boot process, it works like charm! How to disable HDMI detection in u-boot config? Get armbian sources and tools: git clone --depth=1 --branch=v23.11 https://github.com/armbian/build I used branch 23.11 to match kernel 6.6.2 Turned out that U-boot config can be changed only with a patch. ./compile.sh uboot-patch BOARD=rk3318-box BRANCH=edge Attached the patch I created for include/configs/evb_rk3328.h to dIsable video output in u-boot and use only console. u-boot-rockchip64-edge.patch +#define ROCKCHIP_DEVICE_SETTINGS \ + "stdin=serial,usbkbd\0" \ + "stdout=serial,vidconsole\0" \ + "stderr=serial,vidconsole\0" + Placed the patch in: build/patch/u-boot/u-boot-rockchip64 Then rebuild u-boot only: ./compile.sh uboot ARTIFACT_IGNORE_CACHE=yes BOARD=rk3318-box BRANCH=edge During the process you will see which patches are applied, hopefully without any error. This will create a deb package in build/output/debs: linux-u-boot-rk3318-box-edge_23.11.0-trunk_arm64__2022.07-Se092-P44dd-H8c72-Ve9d0-B1179-R448a.deb Install with dpkg: sudo dpkg -i linux-u-boot-rk3318-box-edge_23.11.0-trunk_arm64__2022.07-Se092-P44dd-H8c72-Ve9d0-B1179-R448a.deb This will create 2 files: ls /usr/lib/linux-u-boot-edge-rk3318-box/ idbloader.img u-boot.itb Last step - need to flash the new u-boot into boot partition ( /dev/mmcblk0 ) sudo dd if=idbloader.img of=/dev/mmcblk0 seek=64 conv=notrunc sudo dd if=u-boot.itb of=/dev/mmcblk0 seek=16384 conv=notrunc Done! Reboot and I see a black screen during u-boot. Soon after the kernel is loaded, HDMI is activated and works properly, both video and audio. u-boot-rockchip64-edge.patch

In the last few weeks I had problems with HDMI audio. See details here:

same happened to me, EMMC dead, no way to recover -> only boot from SDCARD

Just in case you want to build your own kernel and choose a specific version (es 23.11): git clone --depth=1 --branch=v23.11 https://github.com/armbian/build Choose edge or current ./compile.sh kernel BOARD=rk3318-box EXPERT="yes" INSTALL_HEADERS=yes RELEASE=jammy BRANCH=edge Optional you can choose specific kernel version using KERNELBRANCH: ./compile.sh kernel BOARD=rk3318-box EXPERT="yes" INSTALL_HEADERS=yes RELEASE=jammy BRANCH=edge KERNELBRANCH="tag:v6.6.2" Compile is quite fast (few minutes). In folder you will find the deb pckgs to be installed: ls output/debs/ linux-dtb-edge-rockchip64_23.11.0-trunk_arm64__6.6.2-Sa06c-Df461-P65a8-C40f3Hfe66-HK01ba-Vc222-B1743-R448a.deb linux-headers-edge-rockchip64_23.11.0-trunk_arm64__6.6.2-Sa06c-Df461-P65a8-C40f3Hfe66-HK01ba-Vc222-B1743-R448a.deb linux-image-edge-rockchip64_23.11.0-trunk_arm64__6.6.2-Sa06c-Df461-P65a8-C40f3Hfe66-HK01ba-Vc222-B1743-R448a.deb Install all and reboot: sudo dpkg -i * Optional - compile u-boot: ./compile.sh uboot BOARD=rk3318-box EXPERT="yes" BRANCH=edge

2. RK3318 (max 1.3Ghz) is safe enough (imho)

Update to hdmi no audio problem. If I boot with HDMI cable disconnected and connect the cable after BOOT (15s after power-up) -> HDMI sound ok If I boot with HDMI cable connected -> no HDMI sound tested with kernel 6.6.60 current and 6.8.11 edge, same issue. Pulseaudio not installed, only using alsa. Analog audio working ok. Monitor/tv edid detected correctly in all cases. Studing some trick to delay HDMI detection after boot. or to re-trigger o re-load hdmi kernel module afterwards. Still no results.

Still working on HDMI audio problem, with updates. ( v24.8.4 for RK3318 Box running Armbian Linux 6.6.47-current-rockchip64) Gdm3 + Xfce Desktop If I boot with HDMI cable disconnected and connect the cable after BOOT completed -> HDMI sound ok If I boot with HDMI cable connected -> no HDMI sound I cannot find any error, all seems ok. aplay -l **** List of PLAYBACK Hardware Devices **** card 0: HDMI [HDMI], device 0: ff000000.i2s-i2s-hifi i2s-hifi-0 [ff000000.i2s-i2s-hifi i2s-hifi-0] Subdevices: 1/1 Subdevice #0: subdevice #0 parse-edid < /sys/class/drm/card0-HDMI-A-1/edid Checksum Correct Section "Monitor" Identifier "Panasonic-TV" ModelName "Panasonic-TV" VendorName "MEI" # Monitor Manufactured week 1 of 2020 # EDID version 1.3 # Digital Display DisplaySize 700 390 Gamma 2.20 Option "DPMS" "false" Horizsync 15-80 VertRefresh 49-76 # Maximum pixel clock is 150MHz #Not giving standard mode: 1280x1024, 60Hz #Extension block found. Parsing... Modeline "Mode 2" 148.500 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync Modeline "Mode 0" 148.50 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync Modeline "Mode 1" 85.50 1360 1424 1536 1792 768 771 777 795 +hsync +vsync Modeline "Mode 3" 148.500 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync Modeline "Mode 4" 74.250 1280 1390 1420 1650 720 725 730 750 +hsync +vsync Modeline "Mode 5" 74.250 1280 1720 1760 1980 720 725 730 750 +hsync +vsync Modeline "Mode 6" 74.250 1920 2008 2052 2200 1080 1082 1087 1125 +hsync +vsync interlace Modeline "Mode 7" 74.250 1920 2448 2492 2640 1080 1082 1089 1125 +hsync +vsync interlace Modeline "Mode 8" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync Modeline "Mode 9" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync Modeline "Mode 10" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync Modeline "Mode 11" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync Modeline "Mode 12" 74.250 1920 2558 2602 2750 1080 1084 1089 1125 +hsync +vsync Modeline "Mode 13" 74.250 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync Modeline "Mode 14" 74.250 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync Modeline "Mode 15" 27.000 1440 1464 1590 1728 576 578 581 625 -hsync -vsync interlace Modeline "Mode 16" 27.000 1440 1464 1590 1728 576 578 581 625 -hsync -vsync interlace Modeline "Mode 17" 25.200 640 656 752 800 480 490 492 525 -hsync -vsync Modeline "Mode 18" 27.027 1440 1478 1602 1716 480 484 487 525 -hsync -vsync interlace Modeline "Mode 19" 27.027 1440 1478 1602 1716 480 484 487 525 -hsync -vsync interlace Modeline "Mode 20" 27.00 720 732 796 864 576 581 586 625 -hsync -vsync Option "PreferredMode" "Mode 2" EndSection Tried to include in boot.cmd extra option "hdmi.audio=1" with no results. Tried to reload all alsa modules with sudo alsa force-reload -> no results Tried to disable and re-enable hdmi with: xrandr --output HDMI-1 --off xrandr --output HDMI-1 --auto no result

Still working on HDMI audio, with some updates. Pulseaudio default sink set correctly. Fisrt of all the issue appears only on my home TV. Tested with other TV sound seems ok. HDMI port works with other device (my notebook) kernel 6.6.47-current Armbian v24.8.4 -> no hdmi audio kernel 6.6.2-edge Armbian v23.11.1 -> no hdmi audio kernel 6.8.11-edge Armbian v24.8.4 -> no hdmi audio kernel 6.11.0-edge Armbian v24.8.4 -> no hdmi audio kernel 6.1.63-current Armbian v23.11.1 -> hdmi audio OK still working on ..

Update: the error I see in dmesg are irrilevant, I checked a good working system and they are still there without any issue. Still no HDMI sound on kernel 6.6.47