This is meant to test the sysfs entry for showing rc6 residency in
milliseconds. Remember, sysfs is a permanent interface.
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
tests/Makefile.am | 1 +
tests/rc6_residency.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 81 insertions(+)
create mode 100644 tests/rc6_residency.c
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 6544ec7..a8eed88 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -56,6 +56,7 @@ TESTS_progs = \
drm_vma_limiter_cpu \
drm_vma_limiter_gtt \
drm_vma_limiter_cached \
+ rc6_residency \
$(NULL)
# IMPORTANT: The ZZ_ tests need to be run last!
diff --git a/tests/rc6_residency.c b/tests/rc6_residency.c
new file mode 100644
index 0000000..8ae6aa4
--- /dev/null
+++ b/tests/rc6_residency.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright ? 2012 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.
+ *
+ * Authors:
+ * Ben Widawsky <ben at bwidawsk.net>
+ *
+ */
+
+#include <stdlib.h>
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include "drmtest.h"
+
+static unsigned int readit(const char *path)
+{
+ unsigned int ret;
+
+ FILE *file;
+ file = fopen(path, "r");
+ if (file == NULL) {
+ fprintf(stderr, "Couldn't open %s (%d)\n", path, errno);
+ abort();
+ }
+ fscanf(file, "%u", &ret);
+ fclose(file);
+
+ return ret;
+}
+
+int main(int argc, char *argv[])
+{
+ /* TODO: don't always assume 0 */
+ const int device = 0;
+ char *path;
+ int fd, ret;
+ unsigned int value, value2;
+
+ /* Use drm_open_any to verify device existence */
+ fd = drm_open_any();
+ close(fd);
+
+ ret = asprintf(&path, "/sys/class/drm/card%d/power/rc6", device);
+ if (ret == -1 || ret < strlen("/sys/class/drm/card0/power/rc6"))
+ abort();
+
+ value = readit(path);
+
+ // Sleep for 3 seconds and compare
+ sleep(3);
+ value2 = readit(path);
+ free(path);
+
+ /* Plenty of fudge */
+ if (((value2 - value) > 3900) ||
+ ((value2 - value) < 2100))
+ exit(EXIT_FAILURE);
+
+ exit(EXIT_SUCCESS);
+}
--
1.7.9.4
