On Thu, Mar 30, 2023 at 2:10 AM Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx> wrote: > > On Sat, Feb 18, 2023 at 4:47 PM Pin-yen Lin <treapking@xxxxxxxxxxxx> wrote: > > > > This series is developed for and tested on MT8173 board, and the layout is: > > > > /-- anx7688 > > -- MT8173 HDMI bridge -- GPIO mux > > \-- native HDMI > > What is the part number of this GPIO mux? Does mux gpio interrupt > based and able to switch output HDMI and DP. If so, how this gpio > interrupt is different than the HPD in native HDMI? I mean does HPD > have any detection bottlenecks with mux gpio interrupt? It's a full blown HDMI 1:2 demultiplexer, so DDC and HPD signals are muxed as well. The anx7688 handles all the Type-C stuff, and our EC talks to it. If HDMI output from the SoC needs to be muxed over for DP alt-mode, the EC will signal the SoC. > I do have GPIO Mux that input DSI and two outputs DMD/HDMI Input and > HDMI Out. 2x1 with 1x2 mux. > > I'm thinking having a generic mux to select the specific out number of > outputs with associated interface outputs can be a viable solution to > address all use cases here. AFAIK DRM doesn't allow dynamically changing the constitution of a display pipeline, so it doesn't really work out for us. If you're just muxing between different outputs with passive/dumb bridges, it may still work for you. ChenYu
