[Intel-gfx] [RFC-v7 09/21] 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 | 9 +++++++++
 drivers/gpu/drm/i915/pxp/intel_pxp.h | 8 ++++++++
 2 files changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 48e926363696..ce3760206b76 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -143,3 +143,12 @@ void intel_pxp_irq_handler(struct intel_pxp *pxp, u16 iir)
 	pxp->current_events |= events;
 	schedule_work(&pxp->irq_work);
 }
+
+bool intel_pxp_gem_object_status(struct drm_i915_private *i915)
+{
+	if (i915->gt.pxp.ctx.id != 0 &&
+	    i915->gt.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 ddcc3faa4ea3..027c0eb84a52 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.h
@@ -37,6 +37,8 @@ struct intel_pxp {
 	struct pxp_context ctx;
 };
 
+struct drm_i915_private;
+
 #ifdef CONFIG_DRM_I915_PXP
 void intel_pxp_irq_handler(struct intel_pxp *pxp, u16 iir);
 int i915_pxp_teardown_required_callback(struct intel_pxp *pxp);
@@ -44,6 +46,7 @@ int i915_pxp_global_terminate_complete_callback(struct intel_pxp *pxp);
 
 int intel_pxp_init(struct intel_pxp *pxp);
 void intel_pxp_uninit(struct intel_pxp *pxp);
+bool intel_pxp_gem_object_status(struct drm_i915_private *i915);
 #else
 static inline void intel_pxp_irq_handler(struct intel_pxp *pxp, u16 iir)
 {
@@ -67,6 +70,11 @@ static inline int intel_pxp_init(struct intel_pxp *pxp)
 static inline void intel_pxp_uninit(struct intel_pxp *pxp)
 {
 }
+
+static inline bool intel_pxp_gem_object_status(struct drm_i915_private *i915)
+{
+	return false;
+}
 #endif
 
 #endif /* __INTEL_PXP_PM_H__ */
-- 
2.17.1