drm/i915/pxp: Add firmware status when ARB session fails

Add firmware status using a drm_warn when ARB session fails
or else a drm_dbg when the ARB session register slot bit did
get set.
Signed-off-by: NAlan Previn <alan.previn.teres.alexis@intel.com>
Reviewed-by: NJuston Li <justonli@chromium.org>
Signed-off-by: NMatt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220923064542.415252-2-alan.previn.teres.alexis@intel.com

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

@@ -77,6 +77,7 @@ static int pxp_create_arb_session(struct intel_pxp *pxp)
 		drm_err(&gt->i915->drm, "arb session failed to go in play\n");
 		return ret;
 	}
+	drm_dbg(&gt->i915->drm, "PXP ARB session is alive\n");
 
 	if (!++pxp->key_instance)
 		++pxp->key_instance;

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

@@ -174,6 +174,9 @@ int intel_pxp_tee_cmd_create_arb_session(struct intel_pxp *pxp,
 
 	if (ret)
 		drm_err(&i915->drm, "Failed to send tee msg ret=[%d]\n", ret);
+	else if (msg_out.header.status != 0x0)
+		drm_warn(&i915->drm, "PXP firmware failed arb session init request ret=[0x%08x]\n",
+			 msg_out.header.status);
 
 	return ret;
 }