On Thu, Jun 23, 2022 at 11:24 AM Stephen Boyd <swboyd@xxxxxxxxxxxx> wrote: > > Quoting Prashant Malani (2022-06-22 10:34:35) > > From: Pin-Yen Lin <treapking@xxxxxxxxxxxx> > > > > ITE IT6505 can be used in systems to switch USB Type-C DisplayPort > > alternate mode lane traffic between 2 Type-C ports. > > How does it work? From what I can tell from the information I find when > googling this part[1] and looking at the existing binding doc is that > this device is a DPI to DP bridge, and it outputs DP (probably 4 lanes > of it?). Does the 2 type-c port design work by transmitting DP on two > lanes of DP for one type-c port and another two lanes of DP for the > other type-c port? > > DP could be one lane, so if this device is able to output one lane on > any output differential pair then I suspect it could support 4 type-c > ports if the hardware engineer connected it that way. Can you confirm my > suspicion? I will let Pin-Yen comment re: this hardware, but 1-lane DP is not a supported Type-C Pin assignment (as per VESA DP Alternate Mode Spec version 2.0 [2]), so the H/W configuration you are suggesting shouldn't be possible. > > [1] https://www.ite.com.tw/en/product/view?mid=45
