Thanks, Nico
On 2017年07月18日 16:20, Nico Huber wrote: > Hi Iru, > > On 18.07.2017 09:28, Iru Cai wrote: >> Hi, >> >> I found the mainboard DP port doesn't have output before kernel starts in >> hp/2570p (https://review.coreboot.org/c/20489/). After I added DP3 and >> HDMI3 in port list, the DP port had output, and cbmem log said it's DP3. >> However, xrandr says this port is DP2. What is the problem? > libgfxinit only knows about physical ports (i.e. how they are ordered* > in the datasheet). Linux ignores ports that aren't strapped to be active > (or are disabled by VBT) and renumbers the ports to fill the holes. > > Nico > > * The numbering is not perfect. As historically VGA was the first port > (port A in datasheets), digital ports are counted from B, so DP1 is > port B, DP2 is port C, etc. Now I found /sys/class/drm_dp_aux_dev/drm_dp_aux{0,1} (Linux 4.4) and `cat /sys/class/drm_dp_aux_dev/*/name` gives me: DPDDC-B DPDDC-D So should the ports be DP1 and DP3? Iru -- coreboot mailing list: coreboot@coreboot.org https://mail.coreboot.org/mailman/listinfo/coreboot