REG_LM_DDC
sii8620_setbits(ctx, REG_LM_DDC, BIT_LM_DDC_SW_TPI_EN_DISABLED, 0);
lm_ddc = sii8620_readb(ctx, REG_LM_DDC);
REG_LM_DDC, lm_ddc | BIT_LM_DDC_SW_TPI_EN_DISABLED,
REG_LM_DDC, lm_ddc