Is your platform coreboot-supported, if yes - have you tested it with coreboot?
On Thu, Feb 25, 2021 at 9:09 PM Rao G <grao....@gmail.com> wrote: > > Hi Coreboot Team, > > There is an external Monitor which works on HDMI/DVI and also DP , In BIOS > the display is good whereas in OS (Ubuntu 18.04) until the kernel is > initialized and i915 Video driver > is loaded display is perfect, looks like the i915 OS driver switches off the > monitor and there is no signal > > Does ACPI GFX method have to return any External display specific data to the > OS driver ? > Tried to make changes to VBIOS but did not help, thought ASL code is missing > under GFX0 > > From the OS following data can be read > > External Monitor's EDID data can be read from I2C Bus > Even VBT data from ACPI NVS can be read > > > Tried to dig into some of these files > https://github.com/torvalds/linux/tree/master/drivers/gpu/drm/i915/display > > intel_dp.c, intel_acpi.c to understand what function is turning off DP link > when i have the OS debug driver logs, can send it across > > Any clues will help, appreciate your time > > PS:The platform has Intel BayTrail SoC, ValleyView chipset and VBIOS. The > bios do not use GOP driver which replaces VBIOS > > Thanks > Rao > _______________________________________________ > coreboot mailing list -- coreboot@coreboot.org > To unsubscribe send an email to coreboot-le...@coreboot.org -- Best regards, Mike Banon Open Source Community Manager of 3mdeb - https://3mdeb.com/ _______________________________________________ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-le...@coreboot.org
