1/* SPDX-License-Identifier: GPL-2.0+ */
2
3/*
4 * Copyright 2019,2020,2022 NXP
5 */
6
7#ifndef __IMX_LDB_HELPER__
8#define __IMX_LDB_HELPER__
9
10#include <linux/device.h>
11#include <linux/kernel.h>
12#include <linux/of.h>
13#include <linux/regmap.h>
14
15#include <drm/drm_atomic.h>
16#include <drm/drm_bridge.h>
17#include <drm/drm_device.h>
18#include <drm/drm_encoder.h>
19#include <drm/drm_modeset_helper_vtables.h>
20
21#define LDB_CH0_MODE_EN_TO_DI0 BIT(0)
22#define LDB_CH0_MODE_EN_TO_DI1 (3 << 0)
23#define LDB_CH0_MODE_EN_MASK (3 << 0)
24#define LDB_CH1_MODE_EN_TO_DI0 BIT(2)
25#define LDB_CH1_MODE_EN_TO_DI1 (3 << 2)
26#define LDB_CH1_MODE_EN_MASK (3 << 2)
27#define LDB_SPLIT_MODE_EN BIT(4)
28#define LDB_DATA_WIDTH_CH0_24 BIT(5)
29#define LDB_BIT_MAP_CH0_JEIDA BIT(6)
30#define LDB_DATA_WIDTH_CH1_24 BIT(7)
31#define LDB_BIT_MAP_CH1_JEIDA BIT(8)
32#define LDB_DI0_VS_POL_ACT_LOW BIT(9)
33#define LDB_DI1_VS_POL_ACT_LOW BIT(10)
34
35#define MAX_LDB_CHAN_NUM 2
36
37enum ldb_channel_link_type {
38 LDB_CH_SINGLE_LINK,
39 LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS,
40 LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS,
41};
42
43struct ldb;
44
45struct ldb_channel {
46 struct ldb *ldb;
47 struct drm_bridge bridge;
48 struct drm_bridge *next_bridge;
49 struct device_node *np;
50 u32 chno;
51 bool is_available;
52 u32 in_bus_format;
53 u32 out_bus_format;
54 enum ldb_channel_link_type link_type;
55};
56
57struct ldb {
58 struct regmap *regmap;
59 struct device *dev;
60 struct ldb_channel *channel[MAX_LDB_CHAN_NUM];
61 unsigned int ctrl_reg;
62 u32 ldb_ctrl;
63 unsigned int available_ch_cnt;
64};
65
66#define bridge_to_ldb_ch(b) container_of(b, struct ldb_channel, bridge)
67
68bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch);
69bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch);
70
71int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge,
72 struct drm_bridge_state *bridge_state,
73 struct drm_crtc_state *crtc_state,
74 struct drm_connector_state *conn_state);
75
76void ldb_bridge_mode_set_helper(struct drm_bridge *bridge,
77 const struct drm_display_mode *mode,
78 const struct drm_display_mode *adjusted_mode);
79
80void ldb_bridge_enable_helper(struct drm_bridge *bridge);
81
82void ldb_bridge_disable_helper(struct drm_bridge *bridge);
83
84int ldb_bridge_attach_helper(struct drm_bridge *bridge,
85 enum drm_bridge_attach_flags flags);
86
87int ldb_init_helper(struct ldb *ldb);
88
89int ldb_find_next_bridge_helper(struct ldb *ldb);
90
91void ldb_add_bridge_helper(struct ldb *ldb,
92 const struct drm_bridge_funcs *bridge_funcs);
93
94void ldb_remove_bridge_helper(struct ldb *ldb);
95
96#endif /* __IMX_LDB_HELPER__ */
97

source code of linux/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h