1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h
new file mode 100644
index 000000000..a0a5cde27
--- /dev/null
+++ b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+/*
+ * Copyright 2019,2020,2022 NXP
+ */
+
+#ifndef __IMX_LDB_HELPER__
+#define __IMX_LDB_HELPER__
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_modeset_helper_vtables.h>
+
+#define LDB_CH0_MODE_EN_TO_DI0		BIT(0)
+#define LDB_CH0_MODE_EN_TO_DI1		(3 << 0)
+#define LDB_CH0_MODE_EN_MASK		(3 << 0)
+#define LDB_CH1_MODE_EN_TO_DI0		BIT(2)
+#define LDB_CH1_MODE_EN_TO_DI1		(3 << 2)
+#define LDB_CH1_MODE_EN_MASK		(3 << 2)
+#define LDB_SPLIT_MODE_EN		BIT(4)
+#define LDB_DATA_WIDTH_CH0_24		BIT(5)
+#define LDB_BIT_MAP_CH0_JEIDA		BIT(6)
+#define LDB_DATA_WIDTH_CH1_24		BIT(7)
+#define LDB_BIT_MAP_CH1_JEIDA		BIT(8)
+#define LDB_DI0_VS_POL_ACT_LOW		BIT(9)
+#define LDB_DI1_VS_POL_ACT_LOW		BIT(10)
+
+#define MAX_LDB_CHAN_NUM		2
+
+enum ldb_channel_link_type {
+	LDB_CH_SINGLE_LINK,
+	LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS,
+	LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS,
+};
+
+struct ldb;
+
+struct ldb_channel {
+	struct ldb *ldb;
+	struct drm_bridge bridge;
+	struct drm_bridge *next_bridge;
+	struct device_node *np;
+	u32 chno;
+	bool is_available;
+	u32 in_bus_format;
+	u32 out_bus_format;
+	enum ldb_channel_link_type link_type;
+};
+
+struct ldb {
+	struct regmap *regmap;
+	struct device *dev;
+	struct ldb_channel *channel[MAX_LDB_CHAN_NUM];
+	unsigned int ctrl_reg;
+	u32 ldb_ctrl;
+	unsigned int available_ch_cnt;
+};
+
+#define bridge_to_ldb_ch(b)	container_of(b, struct ldb_channel, bridge)
+
+bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch);
+bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch);
+
+int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge,
+				   struct drm_bridge_state *bridge_state,
+				   struct drm_crtc_state *crtc_state,
+				   struct drm_connector_state *conn_state);
+
+void ldb_bridge_mode_set_helper(struct drm_bridge *bridge,
+				const struct drm_display_mode *mode,
+				const struct drm_display_mode *adjusted_mode);
+
+void ldb_bridge_enable_helper(struct drm_bridge *bridge);
+
+void ldb_bridge_disable_helper(struct drm_bridge *bridge);
+
+int ldb_bridge_attach_helper(struct drm_bridge *bridge,
+			     enum drm_bridge_attach_flags flags);
+
+int ldb_init_helper(struct ldb *ldb);
+
+int ldb_find_next_bridge_helper(struct ldb *ldb);
+
+void ldb_add_bridge_helper(struct ldb *ldb,
+			   const struct drm_bridge_funcs *bridge_funcs);
+
+void ldb_remove_bridge_helper(struct ldb *ldb);
+
+#endif /* __IMX_LDB_HELPER__ */