Hi dri-devel,
I have a question about validating the user specified rectangles in SetCrtc and
SetPlane.
To me this is required for src_ or crtc_ rectangles to be legal, true for both
SetCrtc and SetPlane:
1) src_{x,y,w,h} fits entirely within the fb size
2) crtc_{x,y,w,h} fits entirely within the mode size
There is some common code that enforces 1), but 2) appears to be up to
individual drivers to enforce (if they choose to) as far as I can tell.
If the crtc_ output rectangle extends outside of the connector's active mode,
should DRM drivers perform the mode clipping themselves, or should this be
considered an application bug and an error code returned?
Is there any reason not to enforce 2) in the core DRM code, rather than in the
individual drivers?
Thanks,
-Adam
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