On 12 May 2015 at 13:27, Dave Airlie <airlied@xxxxxxxxx> wrote: > On 12 May 2015 at 11:50, Dave Airlie <airlied@xxxxxxxxx> wrote: >> Hi, >> >> So I have a branch that makes no sound, >> http://cgit.freedesktop.org/~airlied/linux/log/?h=dp-mst-audio >> >> and I'm not sure where I need to turn to next, >> >> The Intel docs I've read are kinda vague, assuming you know lots of >> things I clearly don't. >> >> so in theory my branch, sets up the SDP stream to the monitor in the >> payload creation, >> enables the codec in the intel GPU driver, and passes the ELD to the >> audio driver. >> >> The audio driver uses the device list to get the presence/valid bits >> per device, and manages to retrieve the ELD. I even create ELD files >> in /proc/asound/HDMI/ that have sensible values in them >> >> So it looks like I'm just missing some routing somewhere, most likely >> in the audio driver, then again I could be missing a lot more than >> that. >> >> Just looking for any ideas or knowledge people may have locked in >> their brains or inside their firewalls. > > Okay the branch now has audio on my test setup, > > I've had to hack out the intel_not_share_assigned_cvt function > it appears to do bad things, I set pin 6 to connection 0 (pin 2), the later > sets on pin 5/7 to connection 1 by that function seems to reprogram pin 6. > > I'm guessing the connection is assigned to a device not a pin in the new hw, > and the same device is routed via pin 5/7 so I end up trashing it. > > my test setup is a Haswell Lenovo t440s + docking station + Dell U2410. > ping audio guys? can someone from alsa please take a look or some interest in this? The graphics side patches are fairly trivial, also it would be good to get a good explaination of how the hw works, from what I can see devices get connections not pins on this hw, and I notice that I don't always get 3 devices, so I'm not sure if devices are a dynamic thing we should be reprobing on some signal. Dave. _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
