2 files changed, 28 insertions, 0 deletions

diff --git a/src/lib/ecore_drm2/Ecore_Drm2.h b/src/lib/ecore_drm2/Ecore_Drm2.h
index 843cfa6a2d..5c43258177 100644
--- a/src/lib/ecore_drm2/Ecore_Drm2.h
+++ b/src/lib/ecore_drm2/Ecore_Drm2.h
@@ -1196,6 +1196,17 @@ EAPI Eina_Bool ecore_drm2_output_pending_get(Ecore_Drm2_Output *output);
  */
 EAPI Eina_Bool ecore_drm2_output_background_color_set(Ecore_Drm2_Output *output, uint64_t r, uint64_t g, uint64_t b, uint64_t a);
 
+/**
+ * Check if vblank is supported by the current video driver
+ *
+ * @param dev
+ *
+ * @return EINA_TRUE if vblank is supported, EINA_FALSE otherwise
+ *
+ * @ingroup Ecore_Drm2_Device_Group
+ * @since 1.23 */
+EAPI Eina_Bool ecore_drm2_vblank_supported(Ecore_Drm2_Device *dev);
+
 # endif
 
 #endif
diff --git a/src/lib/ecore_drm2/ecore_drm2_device.c b/src/lib/ecore_drm2/ecore_drm2_device.c
index b95a5a7d9e..c86df1a271 100644
--- a/src/lib/ecore_drm2/ecore_drm2_device.c
+++ b/src/lib/ecore_drm2/ecore_drm2_device.c
@@ -891,6 +891,23 @@ ecore_drm2_device_fd_get(Ecore_Drm2_Device *device)
    return device->fd;
 }
 
+EAPI Eina_Bool
+ecore_drm2_vblank_supported(Ecore_Drm2_Device *dev)
+{
+   drmVBlank tmp;
+   int ret = 0;
+
+   EINA_SAFETY_ON_NULL_RETURN_VAL(dev, EINA_FALSE);
+
+   memset(&tmp, 0, sizeof(drmVBlank));
+   tmp.request.type = DRM_VBLANK_RELATIVE;
+
+   ret = sym_drmWaitVBlank(dev->fd, &tmp);
+
+   if (ret != 0) return EINA_FALSE;
+   return EINA_TRUE;
+}
+
 /* prevent crashing with old apps compiled against these functions */
 EAPI void ecore_drm2_device_keyboard_cached_context_set(){};
 EAPI void ecore_drm2_device_keyboard_cached_keymap_set(){};