sisfb_seq_read
static inline uint sisfb_seq_read(struct sisfb *, uint);
tmp = sisfb_seq_read(fb, 0x0a);
tmp = sisfb_seq_read(fb, 0x0b);
(sisfb_seq_read(fb, 0x0d) << 16) |
((sisfb_seq_read(fb, 0x37) & 0x03) << 24);
tmp = sisfb_seq_read(fb, 0x06);