diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
index 365809edf29a..89c0084c2814 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
@@ -66,6 +66,7 @@ static void fsl_dcu_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
 	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+	struct drm_connector *con = &fsl_dev->connector.base;
 	struct drm_display_mode *mode = &crtc->state->mode;
 	unsigned int hbp, hfp, hsw, vbp, vfp, vsw, index, pol = 0;
 
@@ -80,6 +81,10 @@ static void fsl_dcu_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 	vfp = mode->vsync_start - mode->vdisplay;
 	vsw = mode->vsync_end - mode->vsync_start;
 
+	/* INV_PXCK as default (most display sample data on rising edge) */
+	if (!(con->display_info.bus_flags & DRM_BUS_FLAG_PIXDATA_POSEDGE))
+		pol |= DCU_SYN_POL_INV_PXCK;
+
 	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
 		pol |= DCU_SYN_POL_INV_HS_LOW;
 
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
index 5bb7c261fe95..c275f900ff23 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
@@ -47,8 +47,8 @@
 #define DCU_VSYN_PARA_FP(x)		(x)
 
 #define DCU_SYN_POL			0x0024
-#define DCU_SYN_POL_INV_PXCK_FALL	(0 << 6)
-#define DCU_SYN_POL_NEG_REMAIN		(0 << 5)
+#define DCU_SYN_POL_INV_PXCK		BIT(6)
+#define DCU_SYN_POL_NEG			BIT(5)
 #define DCU_SYN_POL_INV_VS_LOW		BIT(1)
 #define DCU_SYN_POL_INV_HS_LOW		BIT(0)
 
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index ceb20486dacf..b19c88f188b0 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -72,6 +72,7 @@ struct panel_desc {
 	} delay;
 
 	u32 bus_format;
+	u32 bus_flags;
 };
 
 struct panel_simple {
@@ -144,6 +145,7 @@ static int panel_simple_get_fixed_modes(struct panel_simple *panel)
 	if (panel->desc->bus_format)
 		drm_display_info_set_bus_formats(&connector->display_info,
 						 &panel->desc->bus_format, 1);
+	connector->display_info.bus_flags = panel->desc->bus_flags;
 
 	return num;
 }
@@ -1051,7 +1053,8 @@ static const struct panel_desc nec_nl4827hc19_05b = {
 		.width = 95,
 		.height = 54,
 	},
-	.bus_format = MEDIA_BUS_FMT_RGB888_1X24
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.bus_flags = DRM_BUS_FLAG_PIXDATA_POSEDGE,
 };
 
 static const struct display_timing okaya_rs800480t_7x0gp_timing = {
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 4acdaf5e283d..d1559cd04e3d 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -118,6 +118,14 @@ enum subpixel_order {
 #define DRM_COLOR_FORMAT_RGB444		(1<<0)
 #define DRM_COLOR_FORMAT_YCRCB444	(1<<1)
 #define DRM_COLOR_FORMAT_YCRCB422	(1<<2)
+
+#define DRM_BUS_FLAG_DE_LOW		(1<<0)
+#define DRM_BUS_FLAG_DE_HIGH		(1<<1)
+/* drive data on pos. edge */
+#define DRM_BUS_FLAG_PIXDATA_POSEDGE	(1<<2)
+/* drive data on neg. edge */
+#define DRM_BUS_FLAG_PIXDATA_NEGEDGE	(1<<3)
+
 /*
  * Describes a given display (e.g. CRT or flat panel) and its limitations.
  */
@@ -139,6 +147,7 @@ struct drm_display_info {
 
 	const u32 *bus_formats;
 	unsigned int num_bus_formats;
+	u32 bus_flags;
 
 	/* Mask of supported hdmi deep color modes */
 	u8 edid_hdmi_dc_modes;