On Tue, 08 Mar 2022 20:25:54 +0100, Pierre-Louis Bossart wrote: > > The NHLT information can be used to figure out which SSPs are enabled > in a platform. > > The 'SSP' link type is too broad for machine drivers, since it can > cover the Bluetooth sideband and the analog audio codec connections, > so this helper exposes a parameter to filter with the device > type (DEVICE_I2S refers to analog audio codec in NHLT parlance). > > The helper returns a mask, since more than one SSP may be used for > analog audio, e.g. the NHLT spec describes the use of SSP0 for > amplifiers and SSP1 for headset codec. Note that if more than one bit > is set, it's impossible to determine which SSP is connected to what > external component. Additional platform-specific information based on > e.g. DMI quirks would still be required in the machine driver to > configure the relevant dailinks. > > Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> > Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx> > Reviewed-by: Péter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx> Acked-by: Takashi Iwai <tiwai@xxxxxxx> thanks, Takashi
