drm/i915: Check num_pipes before initializing audio component
when num_pipes is zero, it indicates there is no display and HDMI audio doesn't exist. v2: Move the check from caller to callee for consistency. Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Signed-off-by:Elaine Wang <elaine.wang@intel.com> Reviewed-by:
Jani Nikula <jani.nikula@intel.com> Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1482142746-21663-1-git-send-email-elaine.wang@intel.com
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