eng_crtc_validate_timing
head2_validate_timing = (crtc_validate_timing) eng_crtc_validate_timing;
head1_validate_timing = (crtc_validate_timing) eng_crtc_validate_timing;
status_t eng_crtc_validate_timing(
head2_validate_timing = (crtc_validate_timing) eng_crtc_validate_timing;
head1_validate_timing = (crtc_validate_timing) eng_crtc_validate_timing;
status_t eng_crtc_validate_timing(