[Intel-gfx] [PATCH v4 08/23] drm/i915/adl_p: Handle TC cold

[Matt Roper]

From: José Roberto de Souza <jose.souza at intel.com>

On ADL-P TC cold is exited and blocked when legacy aux is powered,
that is exacly the same of what ICL need for static TC ports.

TODO: When a TBT hub or monitor is connected it will cause TBT and
legacy aux to be powered at the same time, hopefully this will not
cause any issues but if it do, some rework will be needed.

v2:
 - skip icl_tc_port_assert_ref_held() warn on, adl-p uses aux to
   block TC cold

BSpec: 55480
Cc: Imre Deak <imre.deak at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
Signed-off-by: Clinton Taylor <Clinton.A.Taylor at intel.com>
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_power.c | 3 ++-
 drivers/gpu/drm/i915/display/intel_tc.c            | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 54c6d65011ee..29d2f1d0cffd 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -551,7 +551,8 @@ static void icl_tc_port_assert_ref_held(struct drm_i915_private *dev_priv,
 	if (drm_WARN_ON(&dev_priv->drm, !dig_port))
 		return;
 
-	if (DISPLAY_VER(dev_priv) == 11 && dig_port->tc_legacy_port)
+	if (IS_ALDERLAKE_P(dev_priv) ||
+	    (DISPLAY_VER(dev_priv) == 11 && dig_port->tc_legacy_port))
 		return;
 
 	drm_WARN_ON(&dev_priv->drm, !intel_tc_port_ref_held(dig_port));
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c
index e325463acddd..1b108dea5fed 100644
--- a/drivers/gpu/drm/i915/display/intel_tc.c
+++ b/drivers/gpu/drm/i915/display/intel_tc.c
@@ -28,7 +28,7 @@ tc_cold_get_power_domain(struct intel_digital_port *dig_port)
 {
 	struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
 
-	if (DISPLAY_VER(i915) == 11)
+	if (IS_ALDERLAKE_P(i915) || DISPLAY_VER(i915) == 11)
 		return intel_legacy_aux_to_power_domain(dig_port->aux_ch);
 	else
 		return POWER_DOMAIN_TC_COLD_OFF;
-- 
2.25.4