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84c0b4a006
Limit GT max frequency to 2600MHz and wait for frequency to reduce before proceeding with a transient flush. This is really only needed for the transient flush: if L2 flush is needed due to 16023588340 then there's no need to do this additional wait since we are already using the bigger hammer. v2: Use generic names, ensure user set max frequency requests wait for flush to complete (Rodrigo) v3: - User requests wait via wait_var_event_timeout (Lucas) - Close races on flush + user requests (Lucas) - Fix xe_guc_pc_remove_flush_freq_limit() being called on last gt rather than root gt (Lucas) v4: - Only apply the freq reducing part if a TDF is needed: L2 flush trumps the need for waiting a lower frequency Fixes:aaa08078e7("drm/xe/bmg: Apply Wa_22019338487") Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com> Link: https://lore.kernel.org/r/20250618-wa-22019338487-v5-4-b888388477f2@intel.com Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com> (cherry picked from commitdeea6a7d6d) Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>