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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h
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/* SPDX-License-Identifier: GPL-2.0+ */

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/*

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 * Copyright 2019,2020,2022 NXP

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 */

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#ifndef __IMX_LDB_HELPER__

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#define __IMX_LDB_HELPER__

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#include <linux/device.h>

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#include <linux/kernel.h>

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#include <linux/of.h>

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#include <linux/regmap.h>

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#include <drm/drm_atomic.h>

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#include <drm/drm_bridge.h>

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#include <drm/drm_device.h>

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#include <drm/drm_encoder.h>

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#include <drm/drm_modeset_helper_vtables.h>

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#define LDB_CH0_MODE_EN_TO_DI0		BIT(0)

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#define LDB_CH0_MODE_EN_TO_DI1		(3 << 0)

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#define LDB_CH0_MODE_EN_MASK		(3 << 0)

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#define LDB_CH1_MODE_EN_TO_DI0		BIT(2)

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#define LDB_CH1_MODE_EN_TO_DI1		(3 << 2)

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#define LDB_CH1_MODE_EN_MASK		(3 << 2)

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#define LDB_SPLIT_MODE_EN		BIT(4)

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#define LDB_DATA_WIDTH_CH0_24		BIT(5)

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#define LDB_BIT_MAP_CH0_JEIDA		BIT(6)

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#define LDB_DATA_WIDTH_CH1_24		BIT(7)

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#define LDB_BIT_MAP_CH1_JEIDA		BIT(8)

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#define LDB_DI0_VS_POL_ACT_LOW		BIT(9)

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#define LDB_DI1_VS_POL_ACT_LOW		BIT(10)

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#define MAX_LDB_CHAN_NUM		2

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enum ldb_channel_link_type {

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	LDB_CH_SINGLE_LINK,

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	LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS,

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	LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS,

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};

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struct ldb;

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struct ldb_channel {

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	struct ldb *ldb;

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	struct drm_bridge bridge;

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	struct drm_bridge *next_bridge;

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	struct device_node *np;

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	u32 chno;

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	bool is_available;

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	u32 in_bus_format;

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	u32 out_bus_format;

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	enum ldb_channel_link_type link_type;

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};

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struct ldb {

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	struct regmap *regmap;

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	struct device *dev;

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	struct ldb_channel *channel[MAX_LDB_CHAN_NUM];

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	unsigned int ctrl_reg;

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	u32 ldb_ctrl;

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	unsigned int available_ch_cnt;

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};

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#define bridge_to_ldb_ch(b)	container_of(b, struct ldb_channel, bridge)

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bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch);

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bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch);

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int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge,

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				   struct drm_bridge_state *bridge_state,

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				   struct drm_crtc_state *crtc_state,

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				   struct drm_connector_state *conn_state);

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void ldb_bridge_mode_set_helper(struct drm_bridge *bridge,

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				const struct drm_display_mode *mode,

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				const struct drm_display_mode *adjusted_mode);

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void ldb_bridge_enable_helper(struct drm_bridge *bridge);

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void ldb_bridge_disable_helper(struct drm_bridge *bridge);

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int ldb_bridge_attach_helper(struct drm_bridge *bridge, struct drm_encoder *encoder,

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			     enum drm_bridge_attach_flags flags);

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int ldb_init_helper(struct ldb *ldb);

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int ldb_find_next_bridge_helper(struct ldb *ldb);

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void ldb_add_bridge_helper(struct ldb *ldb);

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void ldb_remove_bridge_helper(struct ldb *ldb);

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#endif /* __IMX_LDB_HELPER__ */

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