Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) Video Output Switcher Control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 2006 luming.yu@intel.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) The output sysfs class driver provides an abstract video output layer that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) can be used to hook platform specific methods to enable/disable video output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) device through common sysfs interface. For example, on my IBM ThinkPad T42
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) laptop, The ACPI video driver registered its output devices and read/write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) method for 'state' with output sysfs class. The user interface under sysfs is::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)   linux:/sys/class/video_output # tree .
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)   .
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)   |-- CRT0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)   |   |-- device -> ../../../devices/pci0000:00/0000:00:01.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)   |   |-- state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)   |   |-- subsystem -> ../../../class/video_output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)   |   `-- uevent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)   |-- DVI0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)   |   |-- device -> ../../../devices/pci0000:00/0000:00:01.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)   |   |-- state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)   |   |-- subsystem -> ../../../class/video_output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)   |   `-- uevent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)   |-- LCD0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)   |   |-- device -> ../../../devices/pci0000:00/0000:00:01.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)   |   |-- state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)   |   |-- subsystem -> ../../../class/video_output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)   |   `-- uevent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)   `-- TV0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)      |-- device -> ../../../devices/pci0000:00/0000:00:01.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)      |-- state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)      |-- subsystem -> ../../../class/video_output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)      `-- uevent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)