[Intel-gfx] [i-g-t PATCH 4/4] flip_test: switch to using monotonic timestamps

[Imre Deak]

Since monotonic timestamps are now the preferred time format, change
timestamps checks to compare against monotonic instead of real time.
Also add two tests for DRM's compatibility mode where it returns real
timestamps.

Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 tests/flip_test.c |   49 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/tests/flip_test.c b/tests/flip_test.c
index d88f81c..258d727 100644
--- a/tests/flip_test.c
+++ b/tests/flip_test.c
@@ -53,6 +53,7 @@
 #define TEST_VBLANK_BLOCK	(1 << 9)
 #define TEST_VBLANK_ABSOLUTE	(1 << 10)
 #define TEST_VBLANK_EXPIRED_SEQ	(1 << 11)
+#define TEST_TIMESTAMP_REAL	(1 << 12)
 
 #define EVENT_FLIP		(1 << 0)
 #define EVENT_VBLANK		(1 << 1)
@@ -63,6 +64,7 @@ static drm_intel_bufmgr *bufmgr;
 struct intel_batchbuffer *batch;
 uint32_t devid;
 int test_time = 3;
+static bool monotonic_timestamp;
 
 uint32_t *fb_ptr;
 
@@ -296,7 +298,19 @@ analog_tv_connector(struct test_output *o)
 static void event_handler(struct event_state *es, unsigned int frame,
 			  unsigned int sec, unsigned int usec)
 {
-	gettimeofday(&es->current_received_ts, NULL);
+	struct timeval now;
+
+	if (monotonic_timestamp) {
+		struct timespec ts;
+
+		clock_gettime(CLOCK_MONOTONIC, &ts);
+		now.tv_sec = ts.tv_sec;
+		now.tv_usec = ts.tv_nsec / 1000;
+	} else {
+		gettimeofday(&now, NULL);
+	}
+	es->current_received_ts = now;
+
 	es->current_ts.tv_sec = sec;
 	es->current_ts.tv_usec = usec;
 	es->current_seq = frame;
@@ -899,6 +913,28 @@ static int get_pipe_from_crtc_id(int crtc_id)
 	return pfci.pipe;
 }
 
+static void enable_monotonic_timestamp(bool enable)
+{
+	static const char *sysfs_mono_path =
+		"/sys/module/drm/parameters/timestamp_monotonic";
+	int mono_ts_enabled;
+	int scanned;
+	FILE *f;
+
+	f = fopen(sysfs_mono_path, "r+");
+	assert(f);
+
+	scanned = fscanf(f, "%d", &mono_ts_enabled);
+	assert(scanned == 1 && (mono_ts_enabled == 1 || mono_ts_enabled == 0));
+
+	if (mono_ts_enabled != enable)
+		fprintf(f, "%d", enable);
+
+	fclose(f);
+
+	monotonic_timestamp = enable;
+}
+
 static int run_test(int duration, int flags, const char *test_name)
 {
 	struct test_output o;
@@ -911,6 +947,8 @@ static int run_test(int duration, int flags, const char *test_name)
 		exit(5);
 	}
 
+	enable_monotonic_timestamp(!(flags & TEST_TIMESTAMP_REAL));
+
 	/* Find any connected displays */
 	for (c = 0; c < resources->count_connectors; c++) {
 		for (i = 0; i < resources->count_crtcs; i++) {
@@ -941,6 +979,8 @@ int main(int argc, char **argv)
 		const char *name;
 	} tests[] = {
 		{ 15, TEST_VBLANK | TEST_CHECK_TS, "wf-vblank" },
+		{ 15, TEST_VBLANK | TEST_TIMESTAMP_REAL | TEST_CHECK_TS,
+					"wf-vblank with real timestamps" },
 		{ 15, TEST_VBLANK | TEST_VBLANK_BLOCK | TEST_CHECK_TS,
 					"blocking wf-vblank" },
 		{ 5,  TEST_VBLANK | TEST_VBLANK_ABSOLUTE,
@@ -955,6 +995,8 @@ int main(int argc, char **argv)
 					"delayed wf-vblank vs modeset" },
 
 		{ 15, TEST_FLIP | TEST_CHECK_TS | TEST_EBUSY , "plain flip" },
+		{ 5,  TEST_FLIP | TEST_TIMESTAMP_REAL | TEST_CHECK_TS,
+					"flip with real timestamps" },
 		{ 30, TEST_FLIP | TEST_DPMS | TEST_EINVAL, "flip vs dpms" },
 		{ 30, TEST_FLIP | TEST_DPMS | TEST_WITH_DUMMY_LOAD, "delayed flip vs dpms" },
 		{ 5,  TEST_FLIP | TEST_PAN, "flip vs panning" },
@@ -973,6 +1015,11 @@ int main(int argc, char **argv)
 	};
 	int i;
 
+	if (geteuid() != 0) {
+		fprintf(stderr, "you must run this as root\n");
+		exit(EXIT_FAILURE);
+	}
+
 	drm_fd = drm_open_any();
 
 	bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096);
-- 
1.7.9.5