2012/8/21 Christian Gmeiner <[email protected]>: > Hi all, > > my vacation is over and I need to look in some stuff deeper to finally > get the combination coreboot/seabios fully working. The only missing part > aside from a lot of testing is the video bios stuff. Here I am working on > a patch series to extend seabios vga option rom to support flat panels. > > I would like to to use EPI (http://www.epi-standard.org/) for the description > of the panels. Due EOL changes my target hardware supports different > kind of flat panels (with different timings). I can detect what panel is used > with the help of an i2c eeprom. So the normal CBFS will be extended by > n EPI raw files. And here the troubles begins :) > > 1) Can I add symbolic links during runtime > > It would be fine if somewhere during the boot (coreboot or seabios) I > can readout > the needed bytes from the eeprom, decide which EPI file to use and create > something line a symlink to the choosen one. > > panel.epi -> 640_480_panel_name.epi >
As I found out this can be done via nvram. So coreboot set the filename of the EPI file to use and seabios/... etc can simply use it. > 2) Can I load a CBFS file in the option rom? > > The idea is to load the EPI raw file and provide it via VBE (vbe_104f15) BIOS > call. So the geode lx option rom can read out the timing informations via VBE > and setup the video mode. > It could also be possible to store the EPI data at a defined memory area where the option rom can simply check for existing identifiers and checksum. Any hints are really welcome. --- Christian Gmeiner, MSc -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
