[alsa-devel] [PATCH] [RFC 8/13] Intel SST sound card driver
priya.harsha at intel.com
Tue Jul 7 09:04:16 CEST 2009
>From: Takashi Iwai [mailto:tiwai at suse.de]
>Sent: Tuesday, July 07, 2009 12:19 PM
>To: Harsha, Priya
>Cc: Koul, Vinod; alsa-devel at alsa-project.org
>Subject: Re: [alsa-devel] [PATCH] [RFC 8/13] Intel SST sound card driver
>At Tue, 7 Jul 2009 11:50:46 +0530,
>Harsha, Priya wrote:
>> >> + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
>> >> + .info = snd_intelmad_line_volume_info,
>> >> + .get = snd_intelmad_volume_get,
>> >> + .put = snd_intelmad_volume_set,
>> >Can it have the dB information via TLV?
>> No. It actually differs across the 3 sound cards supported and it's
>> not a direct TLV that can be used.
>Then you'd set a static TLV entry after creating the ctl element
>instance, or return a TLV entry dynamically via the tlv callback.
Sorry I misunderstood. The value that is passed in min and max is in dB.
For min and max values, it's a static dB value that I return. But when the volume adjustments need to be done, based on the value given by ALSA, I set the sound card registers to reflect that dB value. When volume is queried for, I read the specific sound card register and return the dB value to ALSA.
Will this implementation be ok?
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