[Intel-gfx] [PXP CLEAN PATCH v06 22/27] drm/i915/pxp: Expose session state for display protection flip

Sean Z Huang
2020-11-14T00:37:38Z

Implement the intel_pxp_gem_object_status() to allow ring0 i915
display querying the current PXP session state. In the design,
ring0 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@intel.com>
---
drivers/gpu/drm/i915/pxp/intel_pxp.c | 8 ++++++++
drivers/gpu/drm/i915/pxp/intel_pxp.h | 2 ++
2 files changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 23955d7a3c3d..082c1aaabaa8 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -341,3 +341,11 @@ void intel_pxp_irq_handler(struct intel_gt *gt, u16 iir)
end:
return;
}
+
+bool intel_pxp_gem_object_status(struct drm_i915_private *i915, u64 gem_object_metadata)
+{
+ if (i915->pxp.r0ctx && i915->pxp.r0ctx->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 c0119ccdab08..eb0e548ce434 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.h
@@ -111,4 +111,6 @@ 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, u64 gem_object_metadata);
+
#endif