fb_ioctl
.fb_ioctl = drm_fb_helper_ioctl
ret = fb_ioctl(adp, FBIO_ADAPTER, data);
ret = fb_ioctl(adp, FBIO_ADPTYPE, data);
ret = fb_ioctl(adp, FBIO_ADPINFO, data);
error = fb_ioctl(adp, FBIO_MODEINFO, &info);
ret = fb_ioctl(adp, FBIO_MODEINFO, data);
ret = fb_ioctl(adp, FBIO_FINDMODE, data);
ret = fb_ioctl(adp, FBIO_SETWINORG, data);
ret = fb_ioctl(adp, FBIO_GETWINORG, data);
ret = fb_ioctl(adp, cmd, data);
ret = fb_ioctl(adp, cmd, data);
int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,