<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Regression: DP outputs out of sync on dual-DP tiled 5k screen" href="https://bugs.freedesktop.org/show_bug.cgi?id=110671#c10">Comment # 10</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Regression: DP outputs out of sync on dual-DP tiled 5k screen" href="https://bugs.freedesktop.org/show_bug.cgi?id=110671">bug 110671</a> from <a class="email" href="mailto:d.budelkov@gmail.com" title="Denys <d.budelkov@gmail.com>"> Denys</a> <pre>Just added some debug to rc3 and tried to check what happens(in context of 5fc0cbfad4564856ee0f323d3f88a7cff19cc3f1). So in program_timing_sync() there is preparing of groups of pipes for sync. And looks like(in my case) pipe_set[j]->plane_state is always true, and all elements > 0 is removed from the pipe_set in this case, hence group_size == 1 and dc->hwss.enable_timing_synchronization() newer called. Contrary with old check !pipe_set[j]->stream_res.tg->funcs->is_blanked(pipe_set[j]->stream_res.tg) is always false and we have our sync. Maybe it should be !pipe_set[j]->plane_state instead of pipe_set[j]->plane_state ? I applied this change to my 5.3.0-rc3 build and so far everything looks ok. I do not understand the purpose of is_blanked or plane_state, maybe with mst hubs or other stuff it may be a different story, but in my simple config it looks like just a typo.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>