drm/ast: Init cursors before creating modesetting structures
The cursor helpers reserve buffer objects in VRAM and update their content. So although tied to modesetting, cursor helpers are more of a memory manager. The modesetting's cursor plane requires this functionality, so initialize cursors before modesetting. While at it, also add an error check for ast_cursor_init(). Signed-off-by:Thomas Zimmermann <tzimmermann@suse.de> Acked-by:
Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-12-tzimmermann@suse.de
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