#3272 BLOC Trial-3: gstreamer not getting camera data

[Zarro Boogs per Child]

#3272: gstreamer not getting camera data
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  Reporter:  erikb            |       Owner:  dilinger                         
      Type:  defect           |      Status:  new                              
  Priority:  blocker          |   Milestone:  Trial-3                          
 Component:  camera-activity  |     Version:  Development build as of this date
Resolution:                   |    Keywords:                                   
  Verified:  0                |  
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Comment(by corbet):

 Replying to [comment:11 dilinger]:

 > Why would we be loading or enabling the driver in a memory-constrained
 situation?

 The existence of this bug makes it clear that it's happening, no?

 > > The solution is to ensure that this parameter is set at boot time.
 Probably OLPC should just carry a patch in its tree to turn on
 alloc_bufs_at_load by default.  That's *not* a change that I would be able
 to merge upstream, but it clearly makes sense in this situation.
 >
 > Why not?  Does anyone else but us use cafe_ccic?

 Not currently, though one assumes that controller will show up somewhere
 else eventually.  The V4L2 maintainer is quite clear that he thinks
 buffers like this should not be dragged around by the kernel when they are
 not being used; I had to do some arguing to keep the preallocation feature
 in the driver at all.  Feel free to send in a patch if you would like the
 default changed, but I would not expect it to get very far.

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Ticket URL: <https://dev.laptop.org/ticket/3272#comment:13>
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