1 files changed, 40 insertions, 0 deletions
diff --git a/lib/igt_psr.c b/lib/igt_psr.c
new file mode 100644
index 000000000..c979b0b59
--- /dev/null
+++ b/lib/igt_psr.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright © 2018 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include  "igt_psr.h"
+
+bool psr_active(int fd, bool check_active)
+{
+	bool active;
+	char buf[512];
+
+	igt_debugfs_read(fd, "i915_edp_psr_status", buf);
+	active = strstr(buf, "HW Enabled & Active bit: yes\n") &&
+		(strstr(buf, "SRDENT") || strstr(buf, "SLEEP"));
+	return check_active ? active : !active;
+}
+
+bool psr_wait_entry(int fd)
+{
+	return igt_wait(psr_active(fd, true), 500, 1);
+}