[alsa-devel] Regression caused by "ASoC: core: Rework SOC_DOUBLE_R_SX_TLV add SOC_SINGLE_SX_TLV"

Brian Austin brian.austin at cirrus.com
Thu Jan 30 16:23:34 CET 2014

On Thu, 30 Jan 2014, Thomas Petazzoni wrote:

> Dear Brian Austin,
> On Thu, 30 Jan 2014 08:59:44 -0600, Brian Austin wrote:
>> That is odd. My other devices that use this don't show that behavior, I
>> will check on a different device, but I will see if I can get an L51
>> today. So your saying the L51 for PCMA/B Mixer Volume COntrol, you can
>> only select 2 values in the whole range?
> Yes, absolutely. Not only for the PCMA/B Mixer Volume Control but also
> for the two other volume controls that were modified by your commit.
> I'll try to get back to your commit (without my revert) to verify once
> again my claims.
>>> Therefore, I believe that the commit has a problem. I haven't yet
>>> investigated where the problem is, maybe just the values passed to
>>> SOC_DOUBLE_R_SX_TLV(), or maybe in the implementation of the volume
>>> control functions themselves. I can certainly start investigating, but
>>> maybe the author of the commit will immediately realize where the
>>> problem could be.
>> I do see however that the MAX value is not correct and should be 0x80
>> instead of 0x7F. Off by 1...
> Hum, ok, but I don't believe this should affect the range of values
> that alsamixer sees, but only the fact that you're not using the full
> range of volumes available at the codec level, right?

Yeah, that would not explain why you can only use 2 values for gain. That 
means something is for sure broken.

I have an L73 just up now and will check those register values and get 
back to you real soon.

sorry for the hassle

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