On Mon, May 27, 2024 at 01:14:32PM +0800, gareth.yu@xxxxxxxxx wrote: Hi, > A bad link in MST is not retrained. Please also consider MST. > The issue ticket is https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/10902. > > if (intel_dp->is_mst) { > /* > * If we are in MST mode then this connector > * won't appear connected or have anything > * with EDID on it > */ > status = connector_status_disconnected; > goto out; > } > > /* > * Some external monitors do not signal loss of link synchronization > * with an IRQ_HPD, so force a link status check. > */ > if (!intel_dp_is_edp(intel_dp)) { > ret = intel_dp_retrain_link(encoder, ctx); > if (ret) > return ret; > } this is not the proper place to retrain the link, the plan is to remove the above. Could you give a try to the patchset and follow up with a dmesg log on the ticket? Thanks, Imre
