cc486d8061
specific snd_mixer device rather than global across all mixers. - Add per-mixer mute status and saved mute_level so that the mixer_hwmute() function can now toggle the mute state when the mute button is pressed. - Create a dynamic sysctl tree hw.snd.pcmX when a pcm device is registered. - Move the hw.snd.hwvol_* sysctl's to hw.snd.pcmX.hwvol_* so that they are now properly device-specific. Eventually when the mixers become their own devices these sysctl's will move to live under a mixerX tree. - Change the interface of the hwvol_mixer sysctl so that it reports the name of the current mixer device instead of the number and is settable with the name instead of the number. - Add a new function mixer_hwinit() used to setup the dynamic sysctl's needed for the hwvol support that can be called by drivers that support hwvol. Reviewed by: cg
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