#12520 HIGH 13.2.0: No support for HDMI audio on XO-4

Zarro Boogs per Child bugtracker at laptop.org
Tue May 7 21:27:52 EDT 2013

#12520: No support for HDMI audio on XO-4
           Reporter:  Sunny Bao  |       Owner:                                    
               Type:  defect     |      Status:  new                               
           Priority:  high       |   Milestone:  13.2.0                            
          Component:  kernel     |     Version:  Development source as of this date
         Resolution:             |    Keywords:  XO-4, HDMI, Audio                 
        Next_action:  design     |    Verified:  0                                 
Deployment_affected:  Australia  |   Blockedby:                                    
           Blocking:             |  

Comment(by wad):

 (from email from Jon Nettleton)
 Attached is a patch that allows audio to be enabled in the hdmi
 stream.  It does produce a single frame of sound over hdmi then
 silence so not perfect but it should pass your hdmi certification.

 I tested this with a simple patch (attached).

 ideally this should be configured in the mmp_sspa.c when the hw_params
 are setup for the sspa transmit.  I will leave that up to Daniel to
 tweak.  I would probably add an hdmi jack alsa widget also that can be
 enabled/disabled much like the headphone jack.  The state of the hdmi
 plug is tracked in the dss driver.

Ticket URL: <http://dev.laptop.org/ticket/12520#comment:5>
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