[Intel-gfx] [RFC-v1 12/16] drm/i915/pxp: Expose session state for display protection flip

[Huang, Sean Z]

Implement the intel_pxp_gem_object_status() to allow i915 display
querying the current PXP session state. In the design, display
should not perform protection flip on the protected buffers if
there is no PXP session alive.

Signed-off-by: Huang, Sean Z <sean.z.huang at intel.com>
---
 drivers/gpu/drm/i915/pxp/intel_pxp.c | 8 ++++++++
 drivers/gpu/drm/i915/pxp/intel_pxp.h | 7 +++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 48a0eb16f1d9..0fbdd7eecefe 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -201,3 +201,11 @@ void intel_pxp_irq_handler(struct intel_gt *gt, u16 iir)
 	i915->pxp.current_events |= events;
 	schedule_work(&i915->pxp.irq_work);
 }
+
+bool intel_pxp_gem_object_status(struct drm_i915_private *i915)
+{
+	if (i915->pxp.ctx && i915->pxp.ctx->flag_display_hm_surface_keys)
+		return true;
+	else
+		return false;
+}
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.h b/drivers/gpu/drm/i915/pxp/intel_pxp.h
index 425cafe24392..88919f8a2403 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.h
@@ -52,6 +52,8 @@ int i915_pxp_global_terminate_complete_callback(struct drm_i915_private *i915);
 
 int intel_pxp_init(struct drm_i915_private *i915);
 void intel_pxp_uninit(struct drm_i915_private *i915);
+
+bool intel_pxp_gem_object_status(struct drm_i915_private *i915);
 #else
 static inline int intel_pxp_create_arb_session(struct drm_i915_private *i915)
 {
@@ -80,6 +82,11 @@ static inline int intel_pxp_init(struct drm_i915_private *i915)
 static inline void intel_pxp_uninit(struct drm_i915_private *i915)
 {
 }
+
+static inline bool intel_pxp_gem_object_status(struct drm_i915_private *i915)
+{
+	return false;
+}
 #endif
 
 #endif /* __INTEL_PXP_PM_H__ */
-- 
2.17.1