#12547 LOW Not Tri: test /audio tone sweep starts on opposite channel on XO-4

Zarro Boogs per Child bugtracker at laptop.org
Wed Feb 13 18:30:14 EST 2013

#12547: test /audio tone sweep starts on opposite channel on XO-4
           Reporter:  greenfeld            |       Owner:  wmb at firmworks.com                
               Type:  defect               |      Status:  new                              
           Priority:  low                  |   Milestone:  Not Triaged                      
          Component:  ofw - open firmware  |     Version:  Development build as of this date
         Resolution:                       |    Keywords:                                   
        Next_action:  diagnose             |    Verified:  0                                
Deployment_affected:                       |   Blockedby:                                   
           Blocking:                       |  

Comment(by wmb at firmworks.com):

 Stabilizing the channel assignment on MMP2 and MMP3 hardware has proven to
 be extraordinarily difficult.  Different techniques are needed depending
 on whether one is playing back, capturing, or both simultaneously.  The
 techniques are tricky, and do not dovetail well with the Linux driver
 layering.  Attempts to get help from Marvell have been frustrating,
 leading to much churn and thrashing as various non-solutions have been
 proposed, implemented, and determined to be ineffective.

 The latest status is that we have a new recipe from Marvell for the
 capture case, which seems to work.  However, it involves a time delay in
 an inconvenient place in the driver.

 I can easily fix the playback swapping in OFW.

Ticket URL: <http://dev.laptop.org/ticket/12547#comment:4>
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