CRTC_OFF_PITCH
aty_st_le32(CRTC_OFF_PITCH, par->crtc.off_pitch, par);
aty_st_le32(CRTC_OFF_PITCH, par->crtc.off_pitch, par);
aty_st_le32(CRTC_OFF_PITCH, par->crtc.off_pitch, par);
crtc->off_pitch = aty_ld_le32(CRTC_OFF_PITCH, par);
aty_st_le32(CRTC_OFF_PITCH, crtc->off_pitch, par);