diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 71d6adfd9e00..7325d233a695 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -612,6 +612,8 @@ void drm_display_mode_from_videomode(const struct videomode *vm,
 		dmode->flags |= DRM_MODE_FLAG_DBLSCAN;
 	if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
 		dmode->flags |= DRM_MODE_FLAG_DBLCLK;
+	if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
+		dmode->flags |= DRM_MODE_FLAG_PPIXDATA;
 	drm_mode_set_name(dmode);
 }
 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);
@@ -653,6 +655,8 @@ void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
 		vm->flags |= DISPLAY_FLAGS_DOUBLESCAN;
 	if (dmode->flags & DRM_MODE_FLAG_DBLCLK)
 		vm->flags |= DISPLAY_FLAGS_DOUBLECLK;
+	if (dmode->flags & DRM_MODE_FLAG_PPIXDATA)
+		vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
 }
 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);
 
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 3b8571193043..91c30e12ae50 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -116,6 +116,8 @@ extern "C" {
 #define  DRM_MODE_FLAG_PIC_AR_256_135 \
 			(DRM_MODE_PICTURE_ASPECT_256_135<<19)
 
+#define DRM_MODE_FLAG_PPIXDATA			(1<<31)
+
 #define  DRM_MODE_FLAG_ALL	(DRM_MODE_FLAG_PHSYNC |		\
 				 DRM_MODE_FLAG_NHSYNC |		\
 				 DRM_MODE_FLAG_PVSYNC |		\
@@ -128,7 +130,8 @@ extern "C" {
 				 DRM_MODE_FLAG_HSKEW |		\
 				 DRM_MODE_FLAG_DBLCLK |		\
 				 DRM_MODE_FLAG_CLKDIV2 |	\
-				 DRM_MODE_FLAG_3D_MASK)
+				 DRM_MODE_FLAG_3D_MASK |	\
+				 DRM_MODE_FLAG_PPIXDATA)
 
 /* DPMS flags */
 /* bit compatible with the xorg definitions. */