Openmoko Bug #2478: linux 2.6.39: alsa state not correctly restored in resume

[Openmoko Public Trac]

#2478: linux 2.6.39: alsa state not correctly restored in resume
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 Reporter:  lindi    |          Owner:  openmoko-kernel                        
     Type:  defect   |         Status:  new                                    
 Priority:  high     |      Milestone:                                         
Component:  kernel   |        Version:                                         
 Severity:  blocker  |       Keywords:  kernel alsa suspend resume linux 2.6.39
 Haspatch:  0        |      Blockedby:                                         
Estimated:           |    Patchreview:                                         
 Blocking:           |   Reproducible:  always                                 
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Comment(by GNUtoo):

 with echo mem > /sys/power/state I've:
 {{{
 root at om-gta02:~# speaker-test -t sine

 speaker-test 1.0.24.2

 Playback device is default
 Stream parameters are 48000Hz, S16_LE, 1 channels
 Sine wave rate is 440.0000Hz
 Rate set to 48000Hz (requested 48000Hz)
 Buffer size range from 2048 to 16384
 Period size range from 1024 to 1024
 Using max buffer size 16384
 Periods = 4
 was set period_size = 1024
 was set buffer_size = 16384
  0 - Front Left
 Time per period = 2.965543
  0 - Front Left
 Time per period = 2.990143
  0 - Front Left
 T[   70.315000] soc-audio soc-audio: resume work item may be lost
 Write error: -86,Streams pipe error
 [   70.430000] dma2: channel has nothing loaded
 Write error: -32,Broken pipe
 }}}

 doesn't work means that at resume I've no more sound.

 Denis.

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Ticket URL: <https://docs.openmoko.org/trac/ticket/2478#comment:12>
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