[PATCH 2/4] drm/xe: Use gsc_proxy_init_done to check proxy status

[Suraj Kandpal]

Expose gsc_proxy_init_done so that we can check if gsc proxy has
been initialized or not.

Signed-off-by: Suraj Kandpal <suraj.kandpal at intel.com>
---
 drivers/gpu/drm/xe/display/xe_hdcp_gsc.c | 25 ++++++++++++++++++++++--
 drivers/gpu/drm/xe/xe_gsc_proxy.c        |  2 +-
 drivers/gpu/drm/xe/xe_gsc_proxy.h        |  1 +
 3 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c b/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c
index 0f11a39333e2..ca17dfbc3fe9 100644
--- a/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c
+++ b/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c
@@ -5,15 +5,36 @@
 
 #include "i915_drv.h"
 #include "intel_hdcp_gsc.h"
+#include "xe_gt.h"
+#include "xe_gsc_proxy.h"
+#include "xe_pm.h"
 
 bool intel_hdcp_gsc_cs_required(struct drm_i915_private *i915)
 {
 	return true;
 }
 
-bool intel_hdcp_gsc_check_status(struct drm_i915_private *i915)
+bool intel_hdcp_gsc_check_status(struct xe_device *xe)
 {
-	return false;
+	struct xe_tile *tile = xe_device_get_root_tile(xe);
+	struct xe_gt *gt = tile->media_gt;
+	int ret = true;
+
+	xe_pm_runtime_get(xe);
+	ret = xe_force_wake_get(gt_to_fw(gt), XE_FW_GSC);
+	if (ret) {
+		drm_dbg_kms(&xe->drm, "failed to get forcewake to disable GSC interrupts\n");
+		return false;
+	}
+
+	if (!gsc_proxy_init_done(&gt->uc.gsc))
+		ret = false;
+
+	if (!ret)
+		xe_force_wake_put(gt_to_fw(gt), XE_FW_GSC);
+	xe_pm_runtime_get(xe);
+
+	return ret;
 }
 
 int intel_hdcp_gsc_init(struct drm_i915_private *i915)
diff --git a/drivers/gpu/drm/xe/xe_gsc_proxy.c b/drivers/gpu/drm/xe/xe_gsc_proxy.c
index 309ef80e3b95..f37f18a36209 100644
--- a/drivers/gpu/drm/xe/xe_gsc_proxy.c
+++ b/drivers/gpu/drm/xe/xe_gsc_proxy.c
@@ -66,7 +66,7 @@ static inline struct xe_device *kdev_to_xe(struct device *kdev)
 	return dev_get_drvdata(kdev);
 }
 
-static bool gsc_proxy_init_done(struct xe_gsc *gsc)
+bool gsc_proxy_init_done(struct xe_gsc *gsc)
 {
 	struct xe_gt *gt = gsc_to_gt(gsc);
 	u32 fwsts1 = xe_mmio_read32(gt, HECI_FWSTS1(MTL_GSC_HECI1_BASE));
diff --git a/drivers/gpu/drm/xe/xe_gsc_proxy.h b/drivers/gpu/drm/xe/xe_gsc_proxy.h
index 908f9441f093..10de5359fbb8 100644
--- a/drivers/gpu/drm/xe/xe_gsc_proxy.h
+++ b/drivers/gpu/drm/xe/xe_gsc_proxy.h
@@ -11,6 +11,7 @@
 struct xe_gsc;
 
 int xe_gsc_proxy_init(struct xe_gsc *gsc);
+bool gsc_proxy_init_done(struct xe_gsc *gsc);
 void xe_gsc_proxy_remove(struct xe_gsc *gsc);
 int xe_gsc_proxy_start(struct xe_gsc *gsc);
 
-- 
2.25.1