drm/udl: properly set active_16 flag in udl_crtc_page_flip(). (v2)
When page flipping, we need to mark the new fb as active and unmark the active flag for the old fb (if different). Signed-off-by:Haixia Shi <hshi@chromium.org> Reviewed-by:
Stéphane Marchesin <marcheu@chromium.org> Signed-off-by:
Dave Airlie <airlied@gmail.com>
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