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Create an ALSA control to read the value of the firmware CAL_SET_STATUS control. This reports whether the firmware is using a calibration blob or the default calibration from the .bin file. The firmware only reports a valid value in this register while audio is actually playing and the internal PLL is locked to the audio clock. Otherwise it returns a status of "unknown". Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> Link: https://patch.msgid.link/20251111130850.513969-2-rf@opensource.cirrus.com Signed-off-by: Mark Brown <broonie@kernel.org>