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    [ALSA] ASoC: Clarify API for bias configuration · 0be9898a
    Mark Brown 提交于
    Currently the ASoC core configures the bias levels in the system using
    a callback on codecs and machines called 'dapm_event', passing it PCI
    style power levels as SNDRV_CTL_POWER_ constants. This is more obscure
    than it needs to be and has caused confusion to driver authors,
    especially given that DAPM is also performing power management.
    
    Address this by renaming the callback function to 'set_bias_level' and
    using constants explicitly representing the off, standby, pre-on and on
    states which DAPM transitions through.
    
    Also unexport the API for setting bias level: there are currently no
    in-tree users of this API other than the core itself and it is likely
    that the core would need to be extended to cater for any users.
    Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
    Cc: Jarkko Nikula <jarkko.nikula@nokia.com>
    Signed-off-by: NTakashi Iwai <tiwai@suse.de>
    Signed-off-by: NJaroslav Kysela <perex@perex.cz>
    0be9898a
soc-dapm.h 12.8 KB