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 lindi):

 {{{
 Here are some results from systemtap during suspend/resume:

 $ stap -e 'probe module("snd_soc_core").function("snd_soc_resume") {
 printf("%s %s\n", probefunc(), $$parms); }'

 prints ""snd_soc_resume dev=0xc7af5c08"

 $ stap -e 'probe module("snd_soc_wm8753").function("wm8753_resume") {
 printf("%s %s\n", probefunc(), $$parms); }'

 does not print anything.

 dmesg has "soc-audio soc-audio: resume work item may be lost"

 Does this mean that the resume handling of wm8753 was completely skipped?


 }}}

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Ticket URL: <https://docs.openmoko.org/trac/ticket/2478#comment:1>
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