ASoC: SOF: amd: Use semaphore register to synchronize ipc's irq

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Add lock and unlock around ipc irq handling code using hw semaphore
register that exhibit special property for register read calls. As
host and DSP firmware uses few shared registers, there is a possible
race condition around those shared registers values. This lock ensure
synchronization between Firmware and host ipc interrupts.

Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220304205733.62233-6-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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Ajit Kumar Pandey 2022-03-04 14:57:28 -06:00 • committed by Mark Brown

parent b7485ec850

commit dc0d4ed26d

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4 changed files with 30 additions and 1 deletions

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sound/soc/sof/amd/acp-dsp-offset.h

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14

sound/soc/sof/amd/acp-ipc.c

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sound/soc/sof/amd/acp.c

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sound/soc/sof/amd/acp.h

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