On Mon, Aug 10, 2015 at 03:01:49PM +0200, Thierry Reding wrote: > Russell and Sascha were discussing this kind of caching in the i.MX > driver recently. Adding both for visibility. Also not trimming the quote > in case they don't have the original. > > It sounds like this could be useful to have in the core. As I understand > it, hotplug detection is pretty well specified for more modern display > interfaces (like HDMI and DisplayPort), so I think caching of this sort > could work for those. However, I think some older interfaces such as VGA > (or perhaps even DVI as well) don't have reliable hotplug detection and > hence would need to be able to force reading the EDID. > > Still, perhaps a connector flag could be introduced to enable caching on > a per-connector basis, and then we should be able to deal with this in > the DRM core, rather than have per-driver quirks. We've shied away from EDID caching precisely because HPD on Intel is notoriously unreliable. The last suggestion no one followed up with was a short term EDID cache. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
