Nouveau - Aug 2007 - [Bug 11993] New: Native YV12 overlay bandwidth problems

http://bugs.freedesktop.org/show_bug.cgi?id=11993

           Summary: Native YV12 overlay bandwidth problems
           Product: xorg
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: arthur.huillet at free.Fr
         QAContact: xorg-team at lists.x.org


The native YV12 overlay as I implemented it in nouveau has bandwidth problems
when playing ED 1920 "unscaled" (larger than the screen).

Card is NV18.


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arthur.huillet at free.Fr changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|nouveau at lists.freedesktop.or|arthur.huillet at free.Fr
                   |g                           |
           Severity|normal                      |minor
             Status|NEW                         |ASSIGNED
           Priority|medium                      |low




------- Comment #1 from arthur.huillet at free.Fr  2007-08-17 17:19 PST -------
I worked around problems by uploading only the part of the image that is
actually displayed, so that the source point actually is always 0,0, and the
source image is no larger than the user's screen.
This fixed problems on my computer but I am waiting for more testing reports
befor e closing this bug as fixed.


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Pekka Paalanen <pq at iki.fi> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|arthur.huillet at free.Fr      |nouveau at
lists.freedesktop.or
                   |                            |g
             Status|ASSIGNED                    |NEW




--- Comment #3 from Pekka Paalanen <pq at iki.fi>  2009-11-19 13:15:25 PST
---
status update via irc:

< curro__> heh, nv1x bandwidth problems, that code is a bit broken
< curro__> it seems it did the calculations as if there was always just a
single CRTC scanning out
< curro__> i workarounded it on 5603fe7f92d6b06c87f48007989ec1d66d3258bc
by
making it assume a worst case scenario
< curro__> it probably fixed that bug too
< pq> heh, ahuillet, can you re-test? :-)
< ahuillet> pq : I cannot test any longer
< ahuillet> I don't have a working NV1x setup
< curro__> pq: he would have to backport the fix to UMS
< curro__> pq: anyways i don't think my fix is the right thing to do
< curro__> but i haven't found the time to rework that bandwidth code

Reassigning to bug defaults.


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--- Comment #4 from Francisco Jerez <currojerez at riseup.net>  2009-11-28
08:02:50 PST ---
This bug will probably go away if the overlay is ported to KMS, forcing from
userspace the CRTC arbitration parameters the kernel sets after 2d809ca83bb
makes the corruption on the right end of the screen disappear when playing a
1920x1080 YV12 video (at least on my nv11).


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--- Comment #5 from Lucas Stach <dev at lynxeye.de> 2011-02-09 02:53:27
PST ---
UMS is removed and anything should be ported to KMS. Is this still an issue or
could we close this bug?

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Lucas Stach <dev at lynxeye.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #6 from Lucas Stach <dev at lynxeye.de> 2011-03-31 03:29:45
PDT ---
Closing this bug since it references a no longer existent part of nouveau and
we got no new info about this.

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