[mythtv-commits] Ticket #1233: PiP window interferes with guide, can cause DMA issues, using PVR-350 output

MythTV mythtv at cvs.mythtv.org
Tue Feb 7 18:31:18 UTC 2006


#1233: PiP window interferes with guide, can cause DMA issues, using PVR-350
output
--------------------------------+-------------------------------------------
 Reporter:  mythtv.cvs at L8R.net  |       Owner:  ijr
     Type:  defect              |      Status:  new
 Priority:  minor               |   Milestone:     
Component:  mythtv              |     Version:     
 Severity:  medium              |  
--------------------------------+-------------------------------------------
 I'm using ivtv-0.4.2, 8893SVN.

 When the PiP window is on, bringing up the guide leads to visual problems.
 The guide has (when first brought up) a black bar horizontally, across the
 entire vertical portion of the screen matching the height of the PiP
 window.  Moving around in the guide will clear this bar, but clearing the
 guide window many times leads to a temporarily dark screen.  This dark
 screen clears in time (1-3 seconds).

 This also (about one time out of three) causes the same video output
 lockup that has to do with DMA errors.  eg:

 {{{
 ivtv0 warning: prep_user_dma: SG_length 336 page_count 336 still full?
 ivtv0-osd warning: ivtvfb_prep_dec_dma_to_device, Error with
 get_user_pages: 196608 bytes, 336 pages returned
 ivtv0-osd warning: Error: prep osd dma to device rc=-5
 ivtv0-osd warning: DMA xfer from b73ecdf4 of 196608 bytes failed with (-5)
 offset = 0x2edec, total 388588
 ivtv0 warning: DMA_TO: REG_DMAXFER 2 wait failed
 }}}

 John Harvey at one point submitted patches that resolved most of these dma
 errors, citing old ivtv firmware code that should not be used and was
 defunct.  While I do not know any more specifics aside from this, I felt
 it would not hurt to mention it.  Naturally I could be barking up the
 wrong tree, as I have no idea what I am doing. ;)

-- 
Ticket URL: <http://cvs.mythtv.org/trac/ticket/1233>
MythTV <http://www.mythtv.org/>
MythTV


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