drm/i915/guc: Allow user to control default GuC logging
While both naming and actual log enable logic in GuC interface are confusing, we can simply expose the default log as yet another log level. GuC logic aside, from i915 point of view we now have the following GuC log levels: 0 Log disabled 1 Non-verbose log 2-5 Verbose log v2: Adjust naming after rebase. v3: Fixed the log_level logic error introduced on rebase. Signed-off-by: NMichał Winiarski <michal.winiarski@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com> Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Reviewed-by: NSagar Arun Kamble <sagar.a.kamble@intel.com> Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20180319095348.9716-10-michal.winiarski@intel.com
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