[Bug 22317] New: Interlace does not work with Geforce 6200 / NV44a

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

http://bugs.freedesktop.org/show_bug.cgi?id=22317

           Summary: Interlace does not work with Geforce 6200 / NV44a
           Product: xorg
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
        ReportedBy: a.j.buxton-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
         QAContact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org


Created an attachment (id=26856)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=26856)
Photo of the display failing to run interlace mode properly.

Using this modeline:

ModeLine "768x576pali"  14.750  768  789  858  944   576 600 605 625 -hsync
-vsync interlace

interlace mode fails; only the top half of each field is drawn, causing a
result which looks like the attached picture.

I was able to make it work by patching nv_crtc.c, and doubling the values in
mode->CrtcV* in the function nv_crtc_mode_set()

Additionally, when using this modeline and the double height patch:

ModeLine "720x576pali"  13.500  720  722  786  864   576 581 586 625 -hsync
-vsync interlace

there is a vertical black bar down the middle of the picture.


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