58a972efd2
Add check before seeting d0_substate and return success if Audio DSP is already in the target substate. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20191111223343.19986-3-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>