Hello all,
I need to control the backlight of a lcd controlled by us15w (poulsbo). The driver is generated by an Intel application (configuration editor, ced)
I tryed to control the backlight whith IOCTL_VIDEO_QUERY_SUPPORTED_BRIGHTNESS, IOCTL_VIDEO_QUERY_DISPLAY_BRIGHTNESS and IOCTL_VIDEO_SET_DISPLAY_BRIGHTNESS but they don’t work.
So I went to the intel website and, in this document:
http://download.intel.com/embedded/processors/Whitepaper/324567.pdf
they say:
the PCI registers. The ?nameless? driver sets up a dummy driver to access
the PCI Config register and exposes IOCTLs for the user application to read
and write the PCI Config register>
I haven’t understood this sentence, so I tryed with a filter driver on PCI\VEN_8086&DEV_8108, but it doesn’t work (device manager shows, under pci bus, “Intel corp …”, and, under this, “tmdisplay…”, that has the hw id: “Monitor\LCD2546”, but it has no driver installed).
Before proceeeding, I would like to know your opinion: is the “nameless” driver a pci filter? Must I use some directive in the .inf file? Must I filter Monitor\LCD2546?
Thanks