ASoC: SOF: Intel: hda-loader: add IMR restore support

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If the firmware declares the IMR restore feature, we only need to do a
simple powering up to resume from D3, no firmware re-downloading
needed - the context is saved/restored to/from IMR without needing
driver support.

Add a hda_dsp_boot_imr() helper for this simple DSP reboot, and use it
when it is available.

Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
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/20220120231532.196926-5-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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Keyon Jie 2022-01-20 17:15:31 -06:00 • committed by Mark Brown

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sound/soc/sof/intel/hda-loader.c

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