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[Why] Cursor is drawn as part of the framebuffer for a plane on AMD hardware. The cursor position on the framebuffer does not change even if the source rect viewport for the cursor does. This causes the cursor to be clipped. The following IGT tests fail as a result of this issue: - kms_plane_cursor@pipe-*-viewport-size-* [How] Offset cursor position by plane source rect viewport. If the viewport is unscaled then the cursor is now correctly positioned on any plane - primary or overlay. There is still a hardware limitation for dealing with the cursor size being incorrectly scaled but that's not something we can address. Add some documentation explaining some of this in the code while we're at it. Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Reviewed-by: Zhan Liu <Zhan.Liu@amd.com> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
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