HBLANKING_MIN
if (hblanking < HBLANKING_MIN || (hfp < HP_MIN && hbp < HP_MIN)) {
if (hblanking < HBLANKING_MIN) {
delta_adj = HBLANKING_MIN - hblanking;
delta_adj = hblanking - HBLANKING_MIN;
#define HFP_HBP_DEF ((HBLANKING_MIN - SYNC_LEN_DEF) / 2)