drm/i915/perf: rework mux configurations queries
Gen8+ might have mux configurations per slices/subslices. Depending on whether slices/subslices have been fused off, only part of the configuration needs to be applied. This change reworks the mux configurations query mechanism to allow more than one set of registers to be programmed. v2: s/n_mux_regs/n_mux_configs/ (Matthew) Signed-off-by: NLionel Landwerlin <lionel.g.landwerlin@intel.com> Reviewed-by: NMatthew Auld <matthew.auld@intel.com> Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
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