mirror of
https://github.com/torvalds/linux.git
synced 2025-12-07 20:06:24 +00:00
16fef33fdb
The encoder HW/SW state verification should use a SW state which stays unchanged while the encoder/output is active. The intel_dp::is_mst flag used during state computation to choose between the DP SST/MST modes can change while the output is active, if the sink gets disconnected or the MST topology is removed for another reason. A subsequent state verification using intel_dp::is_mst leads then to a mismatch if the output is disabled/re-enabled without recomputing its state. Use the encoder's active MST link count instead, which will be always non-zero for an active MST output and will be zero for SST. Fixes:35d2e4b756("drm/i915/ddi: start distinguishing 128b/132b SST and MST at state readout") Fixes:40d489fac0("drm/i915/ddi: handle 128b/132b SST in intel_ddi_read_func_ctl()") Cc: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20250224093242.1859583-1-imre.deak@intel.com (cherry picked from commit0159e31177) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>