diff mbox series

[v3,2/7] drm/i915/pxp: add device link between i915 and mei_pxp

Message ID 20221221230628.2715916-3-alan.previn.teres.alexis@intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915/pxp: Add missing cleanup steps for PXP global-teardown | expand

Commit Message

Teres Alexis, Alan Previn Dec. 21, 2022, 11:06 p.m. UTC 
From: Alexander Usyskin <alexander.usyskin@intel.com>

Add device link with i915 as consumer and mei_pxp as supplier
to ensure proper ordering of power flows.

V2: condition on absence of heci_pxp to filter out DG

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
---
 drivers/gpu/drm/i915/pxp/intel_pxp_tee.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
index d50354bfb993..bef6d7f8ac55 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
@@ -127,6 +127,10 @@  static int i915_pxp_tee_component_bind(struct device *i915_kdev,
 	intel_wakeref_t wakeref;
 	int ret = 0;
 
+	if (!HAS_HECI_PXP(i915) &&
+	    drm_WARN_ON(&i915->drm, !device_link_add(i915_kdev, tee_kdev, DL_FLAG_STATELESS)))
+		return -ENOMEM;
+
 	mutex_lock(&pxp->tee_mutex);
 	pxp->pxp_component = data;
 	pxp->pxp_component->tee_dev = tee_kdev;
@@ -169,6 +173,9 @@  static void i915_pxp_tee_component_unbind(struct device *i915_kdev,
 	mutex_lock(&pxp->tee_mutex);
 	pxp->pxp_component = NULL;
 	mutex_unlock(&pxp->tee_mutex);
+
+	if (!HAS_HECI_PXP(i915))
+		device_link_remove(i915_kdev, tee_kdev);
 }
 
 static const struct component_ops i915_pxp_tee_component_ops = {