On Thu, 3 Aug 2023 at 23:47, Simon Ser <contact@xxxxxxxxxxx> wrote: > > On Thursday, August 3rd, 2023 at 22:44, Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> wrote: > > > On Thu, Aug 03, 2023 at 03:31:16PM +0000, Simon Ser wrote: > > > > > On Thursday, August 3rd, 2023 at 17:22, Simon Ser contact@xxxxxxxxxxx wrote: > > > > > > > The KMS docs describe "subconnector" to be defined as "downstream port" for DP. > > > > Can USB-C (or USB) be seen as a DP downstream port? > > > > > > To expand on this a bit: I'm wondering if we're mixing apples and > > > oranges here. The current values of "subconnector" typically describe > > > the lower-level protocol tunneled inside DP. For instance, VGA can be > > > tunneled inside the DP cable when using DP → VGA adapter. > > > > Doesn't this contradict the example use case you gave in your previous > > e-mail, with wlroots stating "DP-3 via DVI-D" ? I understand that as DP > > carried over a DVI-D physical connector, did I get it wrong ? > > No, this is DVI carried over DP. DP cannot be carried over VGA/DVI/HDMI, > but VGA/DVI/HDMI can be carried over DP. Well, not quite. It means that the sink (display) connected to this port identifies itself as an VGA / DVI / HDMI monitor. E.g. on if connect HDMI/DVI monitor through the DP-DVI dongle (native DP connector), AMD driver still identifies it as 'subconnector HDMI', despite dongle a DVI connector on the other side. -- With best wishes Dmitry
