On 30.07.21 18:59, Rao G wrote: > Thanks Nico. > > HPD is active , measured the signal
Is your coreboot port public somewhere? If the hardware is fine, maybe the firmware isn't? > > Configured Ports > 1.DDI0- PortB - DP with HDMI/DVI is good in BIOS & OS > 2.DDI1- PortC - DP with HDMI/DVI is good in BIOS, i915 was turning off the > DP display (Never understood the reason) It's very suspicious that these two behave differently. Does the HPD signal (MMIO read) work for DDI0? > > So configured PortC with eDP > > If there is no way BIOS to detect the external display with MMIO registers > when configured as eDP, Can i not turn off the DDI1/Port C at runtime in > BIOS, Maybe it's time to switch to an open-source solution? libgfxinit will probably have the same issue, but it might be possible to get a rather short delay. > am expecting some register should set with eDP as interface and when > display is connected > > any clue why the i915 OS driver was turning off DP display in case 2? I assume the HPD signal doesn't get through to the software. Nico _______________________________________________ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-le...@coreboot.org
