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DPMS functionality is only used by the CRTC's enable and disable functions. Inline the code. The patch also adds symbolic constants for the blank register and constants; according to udlfb, which is a bit more detailed than DRM's udl. v3: * use symbolic constants for blank, according to udlfb driver Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191210084905.5570-5-tzimmermann@suse.de