SPLL_CTLREQ_CHG  3996 drivers/gpu/drm/radeon/si.c 	tmp |= SPLL_CTLREQ_CHG;
SPLL_CTLREQ_CHG  4006 drivers/gpu/drm/radeon/si.c 	tmp &= ~(SPLL_CTLREQ_CHG | SCLK_MUX_UPDATE);