#9604 NORM 1.5-sof: build DC sensor mode on audio driver

[Zarro Boogs per Child]

#9604: build DC sensor mode on audio driver
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           Reporter:  Quozl             |       Owner:  dsd               
               Type:  defect            |      Status:  new               
           Priority:  normal            |   Milestone:  1.5-software-later
          Component:  measure-activity  |     Version:  not specified     
         Resolution:                    |    Keywords:                    
        Next_action:  diagnose          |    Verified:  0                 
Deployment_affected:                    |   Blockedby:                    
           Blocking:                    |  
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Comment(by Quozl):

 Retest, os102, XO-1.5 B2, stereo 3.5mm plug, 0.5V 1KHz square wave from
 CRO test point, Measure-29.

 Square wave shown by Measure in AC "''Sound''" mode.

 Straight line showed by Measure in both DC "''Sensors''" modes.

 This can be worked around by running ''alsamixer'' in virtual terminal and
 raising ''Capture'' to 70 and ''Digital'' to 67.

 Raising these values too high takes the curve off the screen due to the DC
 offset.  Measure does not adjust the Y axis to compensate.

 Therefore there is no apparent problem at kernel level, the problems are
 with Measure's adaption to XO-1.5 mixer changes.

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Ticket URL: <http://dev.laptop.org/ticket/9604#comment:20>
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