v4.19.13 snapshot.
diff --git a/drivers/gpu/drm/stm/ltdc.h b/drivers/gpu/drm/stm/ltdc.h
new file mode 100644
index 0000000..d5afb89
--- /dev/null
+++ b/drivers/gpu/drm/stm/ltdc.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) STMicroelectronics SA 2017
+ *
+ * Authors: Philippe Cornu <philippe.cornu@st.com>
+ * Yannick Fertre <yannick.fertre@st.com>
+ * Fabien Dessenne <fabien.dessenne@st.com>
+ * Mickael Reulier <mickael.reulier@st.com>
+ */
+
+#ifndef _LTDC_H_
+#define _LTDC_H_
+
+struct ltdc_caps {
+ u32 hw_version; /* hardware version */
+ u32 nb_layers; /* number of supported layers */
+ u32 reg_ofs; /* register offset for applicable regs */
+ u32 bus_width; /* bus width (32 or 64 bits) */
+ const u32 *pix_fmt_hw; /* supported pixel formats */
+ bool non_alpha_only_l1; /* non-native no-alpha formats on layer 1 */
+ int pad_max_freq_hz; /* max frequency supported by pad */
+};
+
+#define LTDC_MAX_LAYER 4
+
+struct fps_info {
+ unsigned int counter;
+ ktime_t last_timestamp;
+};
+
+struct ltdc_device {
+ void __iomem *regs;
+ struct clk *pixel_clk; /* lcd pixel clock */
+ struct mutex err_lock; /* protecting error_status */
+ struct ltdc_caps caps;
+ u32 error_status;
+ u32 irq_status;
+ struct fps_info plane_fpsi[LTDC_MAX_LAYER];
+};
+
+int ltdc_load(struct drm_device *ddev);
+void ltdc_unload(struct drm_device *ddev);
+
+#endif