On Sat, Apr 14, 2018 at 12:49:50PM +0200, Pali Rohár wrote: > On Saturday 14 April 2018 12:45:12 Lukas Wunner wrote: > > On Thu, Apr 12, 2018 at 10:15:41PM +0800, Kai-Heng Feng wrote: > > > Do you have any suggestion to check if it connects to the system via > > > Thunderbolt? > > > > Just use pci_is_thunderbolt_attached(), introduced by 8531e283bee6, > > like this: > > > > if (check_dell_switchable_gfx(pci) && !pci_is_thunderbolt_attached(pci)) > > And what about PCI-e device attached to ExpressCard slot? I don't know of a bullet-proof way to recognize those. In theory one could check if the PCIe port above the GPU is a non-hotplug root port, but I think there are machines with hotplug capable root ports with GPUs below them that aren't actually removable. However I think ExpressCard-attached GPUs were rare, much less ones with integrated HDA controller, so in reality that's probably a non-issue. Thanks, Lukas _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
