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/* 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__ */
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