On Thu, 29 Feb 2024 at 17:47, Neil Armstrong <neil.armstrong@xxxxxxxxxx> wrote: > > On 29/02/2024 16:25, Dmitry Baryshkov wrote: > > On Thu, 29 Feb 2024 at 15:08, Neil Armstrong <neil.armstrong@xxxxxxxxxx> wrote: > >> > >> Register a typec mux in order to change the PHY mode on the Type-C > >> mux events depending on the mode and the svid when in Altmode setup. > >> > >> The DisplayPort phy should be left enabled if is still powered on > >> by the DRM DisplayPort controller, so bail out until the DisplayPort > >> PHY is not powered off. > >> > >> The Type-C Mode/SVID only changes on plug/unplug, and USB SAFE states > >> will be set in between of USB-Only, Combo and DisplayPort Only so > >> this will leave enough time to the DRM DisplayPort controller to > >> turn of the DisplayPort PHY. > > > > I think this is not fully correct. Please correct me if I'm wrong, but > > it is possible to switch between USB / USB+DP / DP-only at runtime. > > See the Status Update and Configure commands. > > Yes, but the current implementation is still valid because we need to > have the DP powered-off before changing the PHY mode. Even for switching between 2 lane and 4 lane modes? I'll check how my USB-A+DP dongles work with respect to the altmode configuration. > > I never encountered such setup and I have no idea how to test this. > > > > >> > >> Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx> -- With best wishes Dmitry
