On 06-10-13 16:48, Dave Airlie wrote: > On Mon, Oct 7, 2013 at 8:45 AM, Jethro Beekman <dri-devel@xxxxxxxxxxx> wrote: >> On 06-10-13 15:00, Dave Airlie wrote: >>> On Mon, Oct 7, 2013 at 7:04 AM, Jethro Beekman <dri-devel@xxxxxxxxxxx> wrote: >>>> Even with Dave Airlie's recent patch set ( >>>> http://lists.freedesktop.org/archives/dri-devel/2013-August/042854.html ), I'm >>>> still having trouble getting HDMI audio to work on my optimus laptop. I'm >>>> running Linux 3.12.0-rc3 on a Lenovo ThinkPad T420s. When I set my BIOS graphics >>>> option to 'Discrete', I get the following two devices in lspci: >>>> >>>> 01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [Quadro NVS 4200M] >>>> (rev a1) >>>> 01:00.1 Audio device: NVIDIA Corporation HDMI Audio stub (rev a1) >>>> >>>> When I set the option to 'Optimus', the 01:00.1 device disappears completely. >>>> This is dmesg when loading nouveau in the Optimus configuration: >>>> >>>> pci 0000:01:00.0: optimus capabilities: enabled, status dynamic power, hda bios >>>> codec supported >>>> VGA switcheroo: detected Optimus DSM method \_SB_.PCI0.PEG_.VID_ handle >>>> [drm] hdmi device not found 1 0 1 >>>> >>>> I modified snd-hda-intel to report which devices it's probing, this is the only >>>> one that shows up: >>>> >>>> hda-intel: azx_probe: 0000:00:1b.0 >>>> >>>> Any ideas what's going on? >>> >>> Wierd, I wonder does it route the codecs via the other device, though >>> I can't remember how to see what codecs are available. >> >> /proc/asound/card0/ lists only a single codec which is for analog i/o. >> >>> The other thing would be to try and hack on the hdmi stub using the >>> code in my patches that does it after s/r but do it at startup. >> >> Could you be a little more specific? I tried moving nouveau_get_hdmi_dev() later >> so we have drm->device setup and then adding the 'do magic' nv_mask() call >> before that. That's either not working or something more needs to happen to make >> it work. > > yeah doing the do magic might not work though since Linux would have to rescan > the PCI bus for the hdmi driver to detect it, I wonder can you poke > registers from grub, > or maybe geneate some sort of pci hotplug even so the other layers notice. I added this, copied from the handler for /sys/bus/pci/rescan: struct pci_bus *b = NULL; while ((b = pci_find_next_bus(b)) != NULL) pci_rescan_bus(b); No luck... Also tried adding a specific pci_scan_slot(). How did you find out about the magic register? Are we sure that it's supposed to work on my device? > > Dave. > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
