#10061 HIGH 1.5-sof: Bad interrupt when accessing viafb-camera with XVideo acceleration

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#10061: Bad interrupt when accessing viafb-camera with XVideo acceleration
-------------------------------------+--------------------------------------
           Reporter:  jon.nettleton  |       Owner:  dsaxena            
               Type:  defect         |      Status:  new                
           Priority:  high           |   Milestone:  1.5-software-update
          Component:  kernel         |     Version:  not specified      
         Resolution:                 |    Keywords:  viafb-camera       
        Next_action:  never set      |    Verified:  0                  
Deployment_affected:                 |   Blockedby:                     
           Blocking:                 |  
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Changes (by cjb):

 * cc: corbet, dsaxena (added)
  * owner:  => dsaxena
  * priority:  normal => high
  * component:  not assigned => kernel
  * milestone:  Not Triaged => 1.5-software-update


Comment:

 Hi Jon (Corbet),

 Could you take a look at this?  We finally have Xv hooked up, it's playing
 from non-camera sources successfully, but using the camera with Xv gets us
 into IRQ/DMA problems quickly:

 {{{
 Mar 12 11:57:21 xo-73-22-ac kernel: [  149.052340] VIA DMA timeout!
 Mar 12 11:57:21 xo-73-22-ac kernel: [  149.152283] VIA DMA timeout!
 Mar 12 11:57:21 xo-73-22-ac kernel: [  149.280659] irq 16: nobody cared
 (try booting with the "irqpoll" option)
 }}}

 I've reproduced Jon (Nettleton)'s dmesg here, so it's not just a problem
 with his hardware.  He and I are using the Record activity under Sugar,
 but I think he said he sees the same crash using "mplayer tv://", which I
 know is your preferred test method.  Here's a built version of the
 openchrome driver with Xv support enabled, so to test on an XO you can
 just do:

 {{{
 wget dev.laptop.org/~cjb/openchrome_drv.so
 mv openchrome_drv.so /usr/lib/xorg/modules/drivers/
 killall Xorg
 }}}

-- 
Ticket URL: <http://dev.laptop.org/ticket/10061#comment:1>
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