On Wed, May 09, 2018 at 10:53:53AM +0300, Jani Nikula wrote: > On Wed, 09 May 2018, Feng Tang <feng.tang@xxxxxxxxx> wrote: > > On Tue, May 08, 2018 at 10:30:19PM +0300, Jani Nikula wrote: > >> On Wed, 09 May 2018, Feng Tang <feng.tang@xxxxxxxxx> wrote: > >> >> Well if it's edp probing, then atm we do need to block since we have > >> >> no support for panel hotplugging. And userspace generally no > >> >> expectations that built-in panels come&go. async_synchronize_full > >> >> making our fbdev code less async than desired is kinda a different > >> >> story I think here. First step would be trying to figure out why we > >> >> even bother with edp probing on this platform, when the thing isn't > >> >> there. Sounds like broken VBT. > >> > > >> > Hi Daniel, > >> > > >> > Here are some of the VBT and DPCD related logs on my A3900 (bxt + GEN9 LP) > >> > based NUC. but I don't have the knowledge to tell if the VBT is broken :) > >> > >> Please run current upstream drm-tip when you're suggesting changes to > >> upstream code. Looks like you're running at most v4.14. This can't be > >> emphasized enough. We can't and won't merge the changes unless they make > >> sense with current code. > > > > Yes, I understand, the patch posted was created right after git-pulling > > Linus' tree, and back-ported to test with 4.14 kernel. > > > >> > >> As to vbt, please send me /sys/kernel/debug/dri/0/i915_vbt. > > > > Sure. as attached > > Your VBT claims the device has an eDP panel. Does it have one or not? After asking around, our platform (BXT NUC) does have a eDP interface (someone has tested with a eDP screen), but most of our platforms are connected with 2 HDMI LCD monitors. Thanks, Feng _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
