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DM currently queues some deferred display work on system workqueues. Low-context IRQ handlers are queued on system_highpri_wq, while deferred vmin/vmax updates are queued on system_percpu_wq. Both paths can execute long-running display work. HPD and HPD RX handling may involve link detection, AUX transactions, connector state updates, and hotplug notification. The vmin/vmax update path calls into DC under dc_lock to adjust stream timing. These paths can therefore trigger the workqueue CPU hog detector when run from per-CPU workers: workqueue: dm_irq_work_func [amdgpu] hogged CPU for >10000us workqueue: dm_handle_vmin_vmax_update [amdgpu] hogged CPU for >10000us Move the deferred low-context IRQ work to a dedicated high-priority unbound workqueue, preserving the priority of the previous system_highpri_wq usage while avoiding long-running work on per-CPU workers. Move deferred vmin/vmax updates to a separate normal-priority unbound workqueue. High-context IRQ handlers remain unchanged and continue to run directly from the IRQ path. Signed-off-by: Geoffrey McRae <geoffrey.mcrae@amd.com> Reviewed-by: Leo Li <sunpeng.li@amd.com> Cc: Harry Wentland <harry.wentland@amd.com> Cc: Leo Li <sunpeng.li@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>