tree 12df5df3bfc75605ba1846e6e270f3f36f8d0fd5
parent 6fbbc18ead0f4f64a722f7e325046e5860d2c52b
author Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> 1559578826 -0500
committer Mark Brown <broonie@kernel.org> 1559580482 +0100
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ASoC: SOF: Intel: cnl-ipc: read all IPC registers first

Align with hardware recommended sequences, and read all IPC registers
before doing any other actions. Playing with BUSY and DONE bits may
invalidate values.

The values read may not actually be necessary but at least this
provides a snapshot of the IPC registers with no consistency issues.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>