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07f9cfe2ef
Atm the MST encoder config computation may use an out-of-date pbn_div value, if the sink is unplugged and a sink is replugged with different link rate/lane count capabilities. The current way of reinitializing pbn_div depends on pbn_div getting cleared via intel_atomic_check() -> drm_dp_mst_atomic_check() -> drm_dp_mst_atomic_check_payload_alloc_limits(), however the clearing won't happen if the sink got unplugged (and hence drm_dp_mst_topology_mgr::mst_state being false). To fix the above, simply update pbn_div unconditionally during config computation, making pbn_div always match the link rate and lane count. Cc: Lyude Paul <lyude@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230929154929.343947-1-imre.deak@intel.com
Linux kernel
============
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