[Intel-gfx] [PATCH 2/2] drm/i915/mtl: Add TC port lockdep assert to AUX power well enabling

[Imre Deak <imre.deak@intel.com>]

Similarly to earlier platforms, assert in the MTL AUX power well
enabling handler for TC AUX CH power wells that the TC port using the
AUX CH is locked.

Signed-off-by: Imre Deak <imre.deak@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_power_well.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.c b/drivers/gpu/drm/i915/display/intel_display_power_well.c
index 916009894d89c..820b7d41a0a8f 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_well.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power_well.c
@@ -1794,6 +1794,11 @@ static void xelpdp_aux_power_well_enable(struct drm_i915_private *dev_priv,
 					 struct i915_power_well *power_well)
 {
 	enum aux_ch aux_ch = i915_power_well_instance(power_well)->xelpdp.aux_ch;
+	enum phy phy = icl_aux_pw_to_phy(dev_priv, power_well);
+
+	if (intel_phy_is_tc(dev_priv, phy))
+		icl_tc_port_assert_ref_held(dev_priv, power_well,
+					    aux_ch_to_digital_port(dev_priv, aux_ch));
 
 	intel_de_rmw(dev_priv, XELPDP_DP_AUX_CH_CTL(aux_ch),
 		     XELPDP_DP_AUX_CH_CTL_POWER_REQUEST,
-- 
2.37.2