[Bug 14953] New: patch for checking double scan mode on correct crtc

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org]

http://bugs.freedesktop.org/show_bug.cgi?id=14953

           Summary: patch for checking double scan mode on correct crtc
           Product: xorg
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
        ReportedBy: obiwan-ajv+KCCKUOlAfugRpC6u6w@public.gmane.org
         QAContact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org


Created an attachment (id=15028)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=15028)
patch for getting correct overlay crtc

Last week I noticed I got occasionally problems with Xv because video was not
correctly placed in the window (using the overlay). Some further investigation
showed that the video was not only misplaced in the y direction, but also very
elongated.

The problem was due to CurrentLayout.mode being undefined under randr12, to
mode.Flags being some random number that occasionally lead the driver to think
i was using a doublescan mode. This was recently fixed in git by malc0 using
currentMode->Flags. However, malc0 noted in the changelog that this may also
not be correct for randr12 (It works here, but I think it may in some setups
not always point to the mode on the overlay crtc).

Attached patch should fix this.

Danny


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