<div dir="ltr"><div>Hi, <br></div><div><br></div><div>Sure. <br>Ticket #2683</div><div><a href="https://gitlab.freedesktop.org/drm/intel/-/issues/2683">https://gitlab.freedesktop.org/drm/intel/-/issues/2683</a></div><div><br></div><div>Best regards,<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">sob., 14 lis 2020 o 21:11 Saarinen, Jani <<a href="mailto:jani.saarinen@intel.com">jani.saarinen@intel.com</a>> napisał(a):<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
What is exact gitlab issue for this, can you send link? <br>
<br>
> -----Original Message-----<br>
> From: Intel-gfx <<a href="mailto:intel-gfx-bounces@lists.freedesktop.org" target="_blank">intel-gfx-bounces@lists.freedesktop.org</a>> On Behalf Of Andrzej Kre<br>
> Sent: perjantai 13. marraskuuta 2020 22.28<br>
> To: Deak, Imre <<a href="mailto:imre.deak@intel.com" target="_blank">imre.deak@intel.com</a>><br>
> Cc: <a href="mailto:intel-gfx@lists.freedesktop.org" target="_blank">intel-gfx@lists.freedesktop.org</a>; Heikki Krogerus<br>
> <<a href="mailto:heikki.krogerus@linux.intel.com" target="_blank">heikki.krogerus@linux.intel.com</a>><br>
> Subject: Re: [Intel-gfx] USB-C DP mode problem on linux<br>
> <br>
> Got it.<br>
> <br>
> Thank You for quick replying. Due to coronavirus I was not able to issue a ticket<br>
> quickly . But I created it.<br>
> <br>
> <br>
> Best Regards,<br>
> <br>
> <br>
> wt., 20 paź 2020 o 16:25 Imre Deak <<a href="mailto:imre.deak@intel.com" target="_blank">imre.deak@intel.com</a><br>
> <mailto:<a href="mailto:imre.deak@intel.com" target="_blank">imre.deak@intel.com</a>> > napisał(a):<br>
> <br>
> <br>
> Hi,<br>
> <br>
> On Mon, Oct 19, 2020 at 05:24:59PM +0300, Heikki Krogerus wrote:<br>
> > Hi Andrzej,<br>
> ><br>
> > On Sat, Oct 17, 2020 at 01:34:54PM +0200, Andrzej Kre wrote:<br>
> > > Hi,<br>
> > ><br>
> > > I know that You were involved in working on USB-C DP drivers.<br>
> > > You are my last chance to resolve my issue.<br>
> > ><br>
> > > On my HP laptop I have Intel UHD Graphics 620.<br>
> > > When I'm connecting my 4K monitor to Display Port. It is assigning to<br>
> > > DP-2-2 socket and I have full 3840x2160 with 60.00Hz<br>
> > > But, when I'm connecting the same monitor to the USB-C port, then it is<br>
> > > connecting to the DP-1 socket and the maximum that it can achieve is<br>
> > > 3840x2160 with only 30.00Hz.<br>
> > > But I'm making some trick: I'm connecting the same monitor through<br>
> HDMI, so<br>
> > > it is connecting to DP-1 socket, and simultaneously I'm connecting USB-<br>
> C,<br>
> > > and now USB-C is connecting to DP-2-2 socket (because DP-1 is occupied<br>
> by<br>
> > > HDMI) and I can have full 4K with 60Hz.<br>
> > > Please, help me, how to force USB-C to connect always to DP-2-2<br>
> socket?<br>
> > > Or do You know maybe where is the problem?<br>
> ><br>
> > Unfortunately we have no control over the mux in the operating system<br>
> > on Skylakes, at least in USB subsystem. It all happens in firmware.<br>
> > Maybe graphics side can do something.<br>
> ><br>
> > Adding Jani, Imre, Ville and the Intel GFX list.<br>
> <br>
> On SKL/KBL the USB-C -> native DP/HDMI conversion is done by an off-CPU<br>
> chip and the display driver doesn't have a way either to affect the<br>
> muxing.<br>
> <br>
> Not sure why things work on DP-2 and not on DP-1, there is no port<br>
> specific limits on the CPU side that would explain this. There is a link<br>
> training failure in the log, so would be good to see more details on<br>
> that. Could you file a ticket at<br>
> <a href="https://gitlab.freedesktop.org/drm/intel/-/issues" rel="noreferrer" target="_blank">https://gitlab.freedesktop.org/drm/intel/-/issues</a><br>
> providing a full log booting with drm.debug=0x1e for the working and<br>
> non-working cases?<br>
> <br>
> Thanks,<br>
> Imre<br>
> <br>
<br>
</blockquote></div>