lib: Add igt_dirty_fb

Just wraps drmModeDirtyFB and for now invalidates the whole FB.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>

2 files changed, 15 insertions, 0 deletions

diff --git a/lib/igt_fb.c b/lib/igt_fb.c
index 81809d4c92d5..ee03d622f07d 100644
--- a/lib/igt_fb.c
+++ b/lib/igt_fb.c
@@ -1014,6 +1014,20 @@ static void create_cairo_surface__blit(int fd, struct igt_fb *fb)
 				    blit, destroy_cairo_surface__blit);
 }
 
+/**
+ * igt_dirty_fb:
+ * @fd: open drm file descriptor
+ * @fb: pointer to an #igt_fb structure
+ *
+ * Flushes out the whole framebuffer.
+ *
+ * Returns: 0 upon success.
+ */
+int igt_dirty_fb(int fd, struct igt_fb *fb)
+{
+	return drmModeDirtyFB(fb->fd, fb->fb_id, NULL, 0);
+}
+
 static void destroy_cairo_surface__gtt(void *arg)
 {
 	struct igt_fb *fb = arg;
diff --git a/lib/igt_fb.h b/lib/igt_fb.h
index 0a06899e17f1..03bc9880a0cd 100644
--- a/lib/igt_fb.h
+++ b/lib/igt_fb.h
@@ -93,6 +93,7 @@ unsigned int igt_create_image_fb(int drm_fd,  int width, int height,
 unsigned int igt_create_stereo_fb(int drm_fd, drmModeModeInfo *mode,
 				  uint32_t format, uint64_t tiling);
 void igt_remove_fb(int fd, struct igt_fb *fb);
+int igt_dirty_fb(int fd, struct igt_fb *fb);
 
 /* cairo-based painting */
 cairo_t *igt_get_cairo_ctx(int fd, struct igt_fb *fb);