Replace all open-coded access to MCR and SCU registers in Gen2 with the appropriate calls to ast_moutdwm() and ast_mindwm(). Use MCR and SCU register constants. Name variables according to registers. The values in MCR04 that control VRAM allocation do not look correct. Leave a FIXME comment for later investigation. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com> Link: https://patch.msgid.link/20260327133532.79696-12-tzimmermann@suse.de