Unverified Commit 644eebdb authored Nov 12, 2020 by Pierre-Louis Bossart Committed by Mark Brown Nov 19, 2020

ASoC: soc-acpi: add helper to identify parent driver.

Intel machine drivers are used by parent platform drivers based on
closed-source firmware (Atom/SST and catpt) and SOF-based ones.

In some cases for ACPI-based platforms, the behavior of machine
drivers needs to be modified depending on the parent type, typically
for card names and power management.

An initial solution based on passing a boolean flag as a platform
device parameter was tested earlier. Since it looked overkill, this
patch suggests instead a simple string comparison to identify an SOF
parent device/driver.

Suggested-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20201112223825.39765-5-pierre-louis.bossart@linux.intel.com

Signed-off-by: Mark Brown <broonie@kernel.org>

parent b5682305

include/sound/soc-acpi.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -171,4 +171,10 @@ struct snd_soc_acpi_codecs {
		u8 codecs[SND_SOC_ACPI_MAX_CODECS][ACPI_ID_LEN];
		};

		static inline bool snd_soc_acpi_sof_parent(struct device *dev)
		{
		return dev->parent && dev->parent->driver && dev->parent->driver->name &&
		!strcmp(dev->parent->driver->name, "sof-audio-acpi");
		}

		#endif