[Intel-gfx] [PATCH] drm/i915/mtl: Fix expected reg value for Thunderbolt PLL disabling

[Mika Kahola]

While disabling Thunderbolt PLL, we request PLL to be stopped and
wait for ACK bit to be cleared. The expected value should be '0'
instead of '~XELPDP_TBT_CLOCK_ACK' or otherwise we incorrectly
receive dmesg warn "PHY PLL not unlocked in 10us".

Signed-off-by: Mika Kahola <mika.kahola at intel.com>
---
 drivers/gpu/drm/i915/display/intel_cx0_phy.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
index d94127e7448b..c64cf6778627 100644
--- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
@@ -2861,9 +2861,7 @@ static void intel_mtl_tbt_pll_disable(struct intel_encoder *encoder)
 
 	/* 3. Poll on PORT_CLOCK_CTL TBT CLOCK Ack == "0". */
 	if (__intel_de_wait_for_register(i915, XELPDP_PORT_CLOCK_CTL(encoder->port),
-					 XELPDP_TBT_CLOCK_ACK,
-					 ~XELPDP_TBT_CLOCK_ACK,
-					 10, 0, NULL))
+					 XELPDP_TBT_CLOCK_ACK, 0, 10, 0, NULL))
 		drm_warn(&i915->drm, "[ENCODER:%d:%s][%c] PHY PLL not unlocked after 10us.\n",
 			 encoder->base.base.id, encoder->base.name, phy_name(phy));
 
-- 
2.34.1