tg_regs
optc1->tg_regs->reg
const struct dcn_optc_registers *tg_regs;
static const struct dcn_optc_registers tg_regs[] = {
tg_regs(0),
tg_regs(1),
tg_regs(2),
tg_regs(3),
tgn10->tg_regs = &tg_regs[instance];