From: Alexander Usyskin <alexander.usyskin@xxxxxxxxx>
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@xxxxxxxxx>
---
drivers/gpu/drm/i915/pxp/intel_pxp_tee.c | 7 +++++++
1 file changed, 7 insertions(+)
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 = {
--
2.34.1
