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Only look up the VBIOS mode during atomic_check if the display mode changes. For page flips, the previous settings still apply. Avoids the runtime overhead of looking up the VBIOS mode on each page flip. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20250131092257.115596-17-tzimmermann@suse.de