drm/i915/pxp: Enable PXP with MTL-GSC-CS

Enable PXP with MTL-GSC-CS: add the has_pxp into device info
and increase the debugfs teardown timeouts to align with
new GSC-CS + firmware specs.

Now that we have 3 places that are selecting pxp timeouts
based on tee vs gsccs back-end, let's add a helper.
Signed-off-by: Alan Previn <alan.previn.teres.alexis@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230511231738.1077674-9-alan.previn.teres.alexis@intel.com

drivers/gpu/drm/i915/i915_pci.c

@@ -1209,6 +1209,7 @@ static const struct intel_device_info mtl_info = {
 	.has_mslice_steering = 0,
 	.has_snoop = 1,
 	.max_pat_index = 4,
+	.has_pxp = 1,
 	.__runtime.memory_regions = REGION_SMEM | REGION_STOLEN_LMEM,
 	.__runtime.platform_engine_mask = BIT(RCS0) | BIT(BCS0) | BIT(CCS0),
 	.require_force_probe = 1,

drivers/gpu/drm/i915/pxp/intel_pxp.c

@@ -289,6 +289,14 @@ static bool pxp_component_bound(struct intel_pxp *pxp)
 	return bound;
 }
 
+int intel_pxp_get_backend_timeout_ms(struct intel_pxp *pxp)
+{
+	if (HAS_ENGINE(pxp->ctrl_gt, GSC0))
+		return GSCFW_MAX_ROUND_TRIP_LATENCY_MS;
+	else
+		return 250;
+}
+
 static int __pxp_global_teardown_final(struct intel_pxp *pxp)
 {
 	int timeout;
@@ -302,10 +310,7 @@ static int __pxp_global_teardown_final(struct intel_pxp *pxp)
 	intel_pxp_mark_termination_in_progress(pxp);
 	intel_pxp_terminate(pxp, false);
 
-	if (HAS_ENGINE(pxp->ctrl_gt, GSC0))
-		timeout = GSCFW_MAX_ROUND_TRIP_LATENCY_MS;
-	else
-		timeout = 250;
+	timeout = intel_pxp_get_backend_timeout_ms(pxp);
 
 	if (!wait_for_completion_timeout(&pxp->termination, msecs_to_jiffies(timeout)))
 		return -ETIMEDOUT;
@@ -325,10 +330,7 @@ static int __pxp_global_teardown_restart(struct intel_pxp *pxp)
 	 */
 	pxp_queue_termination(pxp);
 
-	if (HAS_ENGINE(pxp->ctrl_gt, GSC0))
-		timeout = GSCFW_MAX_ROUND_TRIP_LATENCY_MS;
-	else
-		timeout = 250;
+	timeout = intel_pxp_get_backend_timeout_ms(pxp);
 
 	if (!wait_for_completion_timeout(&pxp->termination, msecs_to_jiffies(timeout)))
 		return -ETIMEDOUT;

drivers/gpu/drm/i915/pxp/intel_pxp.h

@@ -27,6 +27,7 @@ void intel_pxp_mark_termination_in_progress(struct intel_pxp *pxp);
 void intel_pxp_tee_end_arb_fw_session(struct intel_pxp *pxp, u32 arb_session_id);
 
 int intel_pxp_get_readiness_status(struct intel_pxp *pxp);
+int intel_pxp_get_backend_timeout_ms(struct intel_pxp *pxp);
 int intel_pxp_start(struct intel_pxp *pxp);
 void intel_pxp_end(struct intel_pxp *pxp);
 

drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c

@@ -14,6 +14,7 @@
 
 #include "intel_pxp.h"
 #include "intel_pxp_debugfs.h"
+#include "intel_pxp_gsccs.h"
 #include "intel_pxp_irq.h"
 #include "intel_pxp_types.h"
 
@@ -45,6 +46,7 @@ static int pxp_terminate_set(void *data, u64 val)
 {
 	struct intel_pxp *pxp = data;
 	struct intel_gt *gt = pxp->ctrl_gt;
+	int timeout_ms;
 
 	if (!intel_pxp_is_active(pxp))
 		return -ENODEV;
@@ -54,8 +56,10 @@ static int pxp_terminate_set(void *data, u64 val)
 	intel_pxp_irq_handler(pxp, GEN12_DISPLAY_PXP_STATE_TERMINATED_INTERRUPT);
 	spin_unlock_irq(gt->irq_lock);
 
+	timeout_ms = intel_pxp_get_backend_timeout_ms(pxp);
+
 	if (!wait_for_completion_timeout(&pxp->termination,
-					 msecs_to_jiffies(100)))
+					 msecs_to_jiffies(timeout_ms)))
 		return -ETIMEDOUT;
 
 	return 0;

drivers/gpu/drm/i915/pxp/intel_pxp_session.c

@@ -44,7 +44,7 @@ static int pxp_wait_for_session_state(struct intel_pxp *pxp, u32 id, bool in_pla
 				      KCR_SIP(pxp->kcr_base),
 				      mask,
 				      in_play ? mask : 0,
-				      100);
+				      250);
 
 	intel_runtime_pm_put(uncore->rpm, wakeref);