lib: Add igt_wait_for_vblank() helper

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

diff --git a/lib/Makefile.am b/lib/Makefile.am
index 06d406f..431fd93 100644 (file)
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -13,6 +13,7 @@ libintel_tools_la_SOURCES =   \
        i915_reg.h              \
        igt_debugfs.c           \
        igt_debugfs.h           \
+       igt_display.c           \
        igt_display.h           \
        instdone.c              \
        instdone.h              \

diff --git a/lib/igt_display.c b/lib/igt_display.c
new file mode 100644 (file)
index 0000000..28e21e6
--- /dev/null
+++ b/lib/igt_display.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright © 2013 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 <string.h>
+
+#include "drmtest.h"
+#include "igt_display.h"
+
+void igt_wait_for_vblank(int drm_fd, enum pipe pipe)
+{
+       drmVBlank wait_vbl;
+
+       memset(&wait_vbl, 0, sizeof(wait_vbl));
+
+       wait_vbl.request.type = pipe << DRM_VBLANK_HIGH_CRTC_SHIFT |
+                               DRM_VBLANK_RELATIVE;
+       wait_vbl.request.sequence = 1;
+
+       igt_assert(drmWaitVBlank(drm_fd, &wait_vbl) == 0);
+}

diff --git a/lib/igt_display.h b/lib/igt_display.h
index 22c8a9f..1357ce9 100644 (file)
--- a/lib/igt_display.h
+++ b/lib/igt_display.h
@@ -52,4 +52,6 @@ enum port {
 };
 #define port_name(p) ((p) + 'A')
 
+void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
+
 #endif /* __IGT_DISPLAY_H__ */