drivers/gpu/drm/bridge/imx/imx-ldb-helper.h

   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
  37 enum 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
  43 struct ldb;
  44
  45 struct 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
  57 struct 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
  68 bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch);
  69 bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch);
  70
  71 int 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
  76 void 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
  80 void ldb_bridge_enable_helper(struct drm_bridge *bridge);
  81
  82 void ldb_bridge_disable_helper(struct drm_bridge *bridge);
  83
  84 int ldb_bridge_attach_helper(struct drm_bridge *bridge,
  85                              enum drm_bridge_attach_flags flags);
  86
  87 int ldb_init_helper(struct ldb *ldb);
  88
  89 int ldb_find_next_bridge_helper(struct ldb *ldb);
  90
  91 void ldb_add_bridge_helper(struct ldb *ldb,
  92                            const struct drm_bridge_funcs *bridge_funcs);
  93
  94 void ldb_remove_bridge_helper(struct ldb *ldb);
  95
  96 #endif /* __IMX_LDB_HELPER__ */