[Bug 99384] [HSW] One of two displays not detected
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Fri Mar 3 17:15:29 UTC 2017
https://bugs.freedesktop.org/show_bug.cgi?id=99384
--- Comment #5 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
Something fishy with MST.
[ 48.701444] [drm:drm_dp_send_link_address] link address reply: 3
[ 48.701446] [drm:drm_dp_send_link_address] port 0: input 1, pdt: 1, pn: 0,
dpcd_rev: 00, mcs: 1, ddps: 1, ldps 0, sdp 0/0
[ 48.701447] [drm:drm_dp_send_link_address] port 1: input 0, pdt: 3, pn: 8,
dpcd_rev: 12, mcs: 0, ddps: 1, ldps 0, sdp 1/2
[ 48.701448] [drm:drm_dp_send_link_address] port 2: input 0, pdt: 0, pn: 1,
dpcd_rev: 00, mcs: 0, ddps: 0, ldps 0, sdp 0/0
So port 1 looks all correct. It claims to have a peer device type of SST sink
or stream sink. the logical port numbers looks fine, and the "display device
plug status" is 1 and it reports it can handle some streams. We seem to be
registering the connector for it, but then we're somehow unable to detect it. I
don't really see why that would happen.
I think someone needs to expand the MST code debug output to make any sense of
this. Also the current debug messages seem rather useless without having the
spec at hand. So someone might want to improve them as well.
--
You are receiving this mail because:
You are the assignee for the bug.
You are the QA Contact for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20170303/1427cb11/attachment.html>
More information about the intel-gfx-bugs
mailing list