tests: add new vblank test

Simple test for event frequency.

configure.ac

@@ -263,6 +263,7 @@ AC_OUTPUT([
 	tests/modeprint/Makefile
 	tests/modetest/Makefile
 	tests/kmstest/Makefile
+	tests/vbltest/Makefile
 	include/Makefile
 	include/drm/Makefile
 	libdrm.pc])

tests/Makefile.am

@@ -47,6 +47,8 @@ TESTS =						\
 	name_from_fd				\
 	$(NULL)
 
+SUBDIRS += vbltest $(NULL)
+
 if HAVE_INTEL
 SUBDIRS += \
 	modeprint				\

tests/vbltest/Makefile.am

@@ -0,0 +1,13 @@
+AM_CFLAGS = \
+	-I$(top_srcdir)/include/drm \
+	-I$(top_srcdir)/intel/ \
+	-I$(top_srcdir)
+
+noinst_PROGRAMS = \
+	vbltest
+
+vbltest_SOURCES = \
+	vbltest.c
+vbltest_LDADD = \
+	$(top_builddir)/libdrm.la \
+	$(top_builddir)/intel/libdrm_intel.la

tests/vbltest/vbltest.c

@@ -0,0 +1,188 @@
+/*
+ * DRM based mode setting test program
+ * Copyright 2008 Tungsten Graphics
+ *   Jakob Bornecrantz <jakob@tungstengraphics.com>
+ * Copyright 2008 Intel Corporation
+ *   Jesse Barnes <jesse.barnes@intel.com>
+ *
+ * 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 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.
+ */
+
+/*
+ * This fairly simple test program dumps output in a similar format to the
+ * "xrandr" tool everyone knows & loves.  It's necessarily slightly different
+ * since the kernel separates outputs into encoder and connector structures,
+ * each with their own unique ID.  The program also allows test testing of the
+ * memory management and mode setting APIs by allowing the user to specify a
+ * connector and mode to use for mode setting.  If all works as expected, a
+ * blue background should be painted on the monitor attached to the specified
+ * connector after the selected mode is set.
+ *
+ * TODO: use cairo to write the mode info on the selected output once
+ *       the mode has been programmed, along with possible test patterns.
+ */
+#include "config.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/poll.h>
+#include <sys/time.h>
+
+#include "xf86drm.h"
+#include "xf86drmMode.h"
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+extern char *optarg;
+extern int optind, opterr, optopt;
+static char optstr[] = "s";
+
+int secondary = 0;
+
+struct vbl_info {
+	unsigned int vbl_count;
+	struct timeval start;
+};
+
+static void vblank_handler(int fd, unsigned int frame, unsigned int sec,
+			   unsigned int usec, void *data)
+{
+	drmVBlank vbl;
+	struct timeval end;
+	struct vbl_info *info = data;
+	double t;
+
+	vbl.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT;
+	if (secondary)
+		vbl.request.type |= DRM_VBLANK_SECONDARY;
+	vbl.request.sequence = 1;
+	vbl.request.signal = (unsigned long)data;
+
+	drmWaitVBlank(fd, &vbl);
+
+	info->vbl_count++;
+
+	if (info->vbl_count == 60) {
+		gettimeofday(&end, NULL);
+		t = end.tv_sec + end.tv_usec * 1e-6 -
+			(info->start.tv_sec + info->start.tv_usec * 1e-6);
+		fprintf(stderr, "freq: %.02fHz\n", info->vbl_count / t);
+		info->vbl_count = 0;
+		info->start = end;
+	}
+}
+
+static void usage(char *name)
+{
+	fprintf(stderr, "usage: %s [-s]\n", name);
+	fprintf(stderr, "\t-s\tuse secondary pipe\n");
+	exit(0);
+}
+
+int main(int argc, char **argv)
+{
+	int i, c, fd;
+	char *modules[] = { "i915", "radeon", "nouveau" };
+	drmVBlank vbl;
+	drmEventContext evctx;
+	struct vbl_info handler_info;
+
+	opterr = 0;
+	while ((c = getopt(argc, argv, optstr)) != -1) {
+		switch (c) {
+		case 's':
+			secondary = 1;
+			break;
+		default:
+			usage(argv[0]);
+			break;
+		}
+	}
+
+	for (i = 0; i < ARRAY_SIZE(modules); i++) {
+		printf("trying to load module %s...", modules[i]);
+		fd = drmOpen(modules[i], NULL);
+		if (fd < 0) {
+			printf("failed.\n");
+		} else {
+			printf("success.\n");
+			break;
+		}
+	}
+
+	if (i == ARRAY_SIZE(modules)) {
+		fprintf(stderr, "failed to load any modules, aborting.\n");
+		return -1;
+	}
+
+	/* Get current count first */
+	vbl.request.type = DRM_VBLANK_RELATIVE;
+	if (secondary)
+		vbl.request.type |= DRM_VBLANK_SECONDARY;
+	vbl.request.sequence = 0;
+	drmWaitVBlank(fd, &vbl);
+
+	printf("starting count: %d\n", vbl.request.sequence);
+
+	handler_info.vbl_count = 0;
+	gettimeofday(&handler_info.start, NULL);
+
+	/* Queue an event for frame + 1 */
+	vbl.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT;
+	if (secondary)
+		vbl.request.type |= DRM_VBLANK_SECONDARY;
+	vbl.request.sequence = 1;
+	vbl.request.signal = (unsigned long)&handler_info;
+	drmWaitVBlank(fd, &vbl);
+
+	/* Set up our event handler */
+	memset(&evctx, 0, sizeof evctx);
+	evctx.version = DRM_EVENT_CONTEXT_VERSION;
+	evctx.vblank_handler = vblank_handler;
+	evctx.page_flip_handler = NULL;
+
+	/* Poll for events */
+	while (1) {
+		struct timeval timeout = { .tv_sec = 3, .tv_usec = 0 };
+		fd_set fds;
+		int ret;
+
+		FD_ZERO(&fds);
+		FD_SET(0, &fds);
+		FD_SET(fd, &fds);
+		ret = select(fd + 1, &fds, NULL, NULL, &timeout);
+
+		if (ret <= 0) {
+			fprintf(stderr, "select timed out or error (ret %d)\n",
+				ret);
+			continue;
+		} else if (FD_ISSET(0, &fds)) {
+			break;
+		}
+
+		drmHandleEvent(fd, &evctx);
+	}
+
+	return 0;
+}