https://justpaste.it/5jszu
I tried with I2C connected and disconnected between screen and tinkerboard. No change. (See below, looks like i2c-3/3-0045/tinker_mcu_bl is missing ). I checked around that area and tinker_mcu_bl is missing, but folder 3-0045 exists with lots of files in there. (bottom of the post)
From dmesg I also see that i2c had a failure (ret = -6). (see next paste)
Looking forward I see that -6 is no device found on i2c bus (assuming that's correct?). Does anyone know if brightness control works?
[ 2.446829] tinker-mcu: tinker_mcu_probe: address = 0x45
[ 2.446843] tinker-mcu: send_cmds: 80
[ 2.493126] tinker-mcu: init_cmd_check: recv_cmds: 0xC3
[ 3.161121] tinker_mcu_screen_power_up
[ 3.161122] tinker-mcu: tinker_mcu_screen_power_up:
[ 3.161127] tinker-mcu: send_cmds: 8500
[ 4.545081] tinker-mcu: send_cmds: 8501
[ 4.569108] tinker-mcu: send_cmds: 8104
[ 4.572138] tinker-mcu: send_cmds: send command failed, ret = -6
[ 4.574293] tinker-mcu: tinker_mcu_set_bright: bright = 0xff
shadowpho@tinkerboard:~$ sudo rpi-backlight -Btinker-board -p toggle
Traceback (most recent call last):
File "/usr/local/bin/rpi-backlight", line 10, in <module> sys.exit(main())
File "/usr/local/lib/python3.7/dist-packages/rpi_backlight/cli.py", line 103, in main if backlight.power:
File "/usr/local/lib/python3.7/dist-packages/rpi_backlight/__init__.py", line 213, in power return bool(self._get_value("tinker_mcu_bl"))
File "/usr/local/lib/python3.7/dist-packages/rpi_backlight/__init__.py", line 85, in _get_value raise e
File "/usr/local/lib/python3.7/dist-packages/rpi_backlight/__init__.py", line 77, in _get_value return int((self._backlight_sysfs_path / name).read_text())
File "/usr/lib/python3.7/pathlib.py", line 1199, in read_text with self.open(mode='r', encoding=encoding, errors=errors) as f:
File "/usr/lib/python3.7/pathlib.py", line 1186, in open opener=self._opener)
File "/usr/lib/python3.7/pathlib.py", line 1039, in _opener return self._accessor.open(self, flags, mode) FileNotFoundError: [Errno 2] No such file or directory: '/sys/devices/platform/ff150000.i2c/i2c-3/3-0045/tinker_mcu_bl'
