drivers/video/exynos/exynos_dp_core.h

   1 /*
   2  * Header file for Samsung DP (Display Port) interface driver.
   3  *
   4  * Copyright (C) 2012 Samsung Electronics Co., Ltd.
   5  * Author: Jingoo Han <jg1.han@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2 of the License, or (at your
  10  * option) any later version.
  11  */
  12
  13 #ifndef _EXYNOS_DP_CORE_H
  14 #define _EXYNOS_DP_CORE_H
  15
  16 struct link_train {
  17         int eq_loop;
  18         int cr_loop[4];
  19
  20         u8 link_rate;
  21         u8 lane_count;
  22         u8 training_lane[4];
  23
  24         enum link_training_state lt_state;
  25 };
  26
  27 struct exynos_dp_device {
  28         struct device           *dev;
  29         struct resource         *res;
  30         struct clk              *clock;
  31         unsigned int            irq;
  32         void __iomem            *reg_base;
  33
  34         struct video_info       *video_info;
  35         struct link_train       link_train;
  36 };
  37
  38 /* exynos_dp_reg.c */
  39 void exynos_dp_enable_video_mute(struct exynos_dp_device *dp, bool enable);
  40 void exynos_dp_stop_video(struct exynos_dp_device *dp);
  41 void exynos_dp_lane_swap(struct exynos_dp_device *dp, bool enable);
  42 void exynos_dp_init_interrupt(struct exynos_dp_device *dp);
  43 void exynos_dp_reset(struct exynos_dp_device *dp);
  44 void exynos_dp_config_interrupt(struct exynos_dp_device *dp);
  45 u32 exynos_dp_get_pll_lock_status(struct exynos_dp_device *dp);
  46 void exynos_dp_set_pll_power_down(struct exynos_dp_device *dp, bool enable);
  47 void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp,
  48                                 enum analog_power_block block,
  49                                 bool enable);
  50 void exynos_dp_init_analog_func(struct exynos_dp_device *dp);
  51 void exynos_dp_init_hpd(struct exynos_dp_device *dp);
  52 void exynos_dp_reset_aux(struct exynos_dp_device *dp);
  53 void exynos_dp_init_aux(struct exynos_dp_device *dp);
  54 int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp);
  55 void exynos_dp_enable_sw_function(struct exynos_dp_device *dp);
  56 int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp);
  57 int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp,
  58                                 unsigned int reg_addr,
  59                                 unsigned char data);
  60 int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp,
  61                                 unsigned int reg_addr,
  62                                 unsigned char *data);
  63 int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp,
  64                                 unsigned int reg_addr,
  65                                 unsigned int count,
  66                                 unsigned char data[]);
  67 int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp,
  68                                 unsigned int reg_addr,
  69                                 unsigned int count,
  70                                 unsigned char data[]);
  71 int exynos_dp_select_i2c_device(struct exynos_dp_device *dp,
  72                                 unsigned int device_addr,
  73                                 unsigned int reg_addr);
  74 int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp,
  75                                 unsigned int device_addr,
  76                                 unsigned int reg_addr,
  77                                 unsigned int *data);
  78 int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp,
  79                                 unsigned int device_addr,
  80                                 unsigned int reg_addr,
  81                                 unsigned int count,
  82                                 unsigned char edid[]);
  83 void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype);
  84 void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype);
  85 void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count);
  86 void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count);
  87 void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype);
  88 void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype);
  89 void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count);
  90 void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count);
  91 void exynos_dp_enable_enhanced_mode(struct exynos_dp_device *dp, bool enable);
  92 void exynos_dp_set_training_pattern(struct exynos_dp_device *dp,
  93                                  enum pattern_set pattern);
  94 void exynos_dp_set_lane0_pre_emphasis(struct exynos_dp_device *dp, u32 level);
  95 void exynos_dp_set_lane1_pre_emphasis(struct exynos_dp_device *dp, u32 level);
  96 void exynos_dp_set_lane2_pre_emphasis(struct exynos_dp_device *dp, u32 level);
  97 void exynos_dp_set_lane3_pre_emphasis(struct exynos_dp_device *dp, u32 level);
  98 void exynos_dp_set_lane0_link_training(struct exynos_dp_device *dp,
  99                                 u32 training_lane);
 100 void exynos_dp_set_lane1_link_training(struct exynos_dp_device *dp,
 101                                 u32 training_lane);
 102 void exynos_dp_set_lane2_link_training(struct exynos_dp_device *dp,
 103                                 u32 training_lane);
 104 void exynos_dp_set_lane3_link_training(struct exynos_dp_device *dp,
 105                                 u32 training_lane);
 106 u32 exynos_dp_get_lane0_link_training(struct exynos_dp_device *dp);
 107 u32 exynos_dp_get_lane1_link_training(struct exynos_dp_device *dp);
 108 u32 exynos_dp_get_lane2_link_training(struct exynos_dp_device *dp);
 109 u32 exynos_dp_get_lane3_link_training(struct exynos_dp_device *dp);
 110 void exynos_dp_reset_macro(struct exynos_dp_device *dp);
 111 int exynos_dp_init_video(struct exynos_dp_device *dp);
 112
 113 void exynos_dp_set_video_color_format(struct exynos_dp_device *dp,
 114                                 u32 color_depth,
 115                                 u32 color_space,
 116                                 u32 dynamic_range,
 117                                 u32 ycbcr_coeff);
 118 int exynos_dp_is_slave_video_stream_clock_on(struct exynos_dp_device *dp);
 119 void exynos_dp_set_video_cr_mn(struct exynos_dp_device *dp,
 120                         enum clock_recovery_m_value_type type,
 121                         u32 m_value,
 122                         u32 n_value);
 123 void exynos_dp_set_video_timing_mode(struct exynos_dp_device *dp, u32 type);
 124 void exynos_dp_enable_video_master(struct exynos_dp_device *dp, bool enable);
 125 void exynos_dp_start_video(struct exynos_dp_device *dp);
 126 int exynos_dp_is_video_stream_on(struct exynos_dp_device *dp);
 127 void exynos_dp_config_video_slave_mode(struct exynos_dp_device *dp,
 128                         struct video_info *video_info);
 129 void exynos_dp_enable_scrambling(struct exynos_dp_device *dp);
 130 void exynos_dp_disable_scrambling(struct exynos_dp_device *dp);
 131
 132 /* I2C EDID Chip ID, Slave Address */
 133 #define I2C_EDID_DEVICE_ADDR                    0x50
 134 #define I2C_E_EDID_DEVICE_ADDR                  0x30
 135
 136 #define EDID_BLOCK_LENGTH                       0x80
 137 #define EDID_HEADER_PATTERN                     0x00
 138 #define EDID_EXTENSION_FLAG                     0x7e
 139 #define EDID_CHECKSUM                           0x7f
 140
 141 /* Definition for DPCD Register */
 142 #define DPCD_ADDR_DPCD_REV                      0x0000
 143 #define DPCD_ADDR_MAX_LINK_RATE                 0x0001
 144 #define DPCD_ADDR_MAX_LANE_COUNT                0x0002
 145 #define DPCD_ADDR_LINK_BW_SET                   0x0100
 146 #define DPCD_ADDR_LANE_COUNT_SET                0x0101
 147 #define DPCD_ADDR_TRAINING_PATTERN_SET          0x0102
 148 #define DPCD_ADDR_TRAINING_LANE0_SET            0x0103
 149 #define DPCD_ADDR_LANE0_1_STATUS                0x0202
 150 #define DPCD_ADDR_LANE_ALIGN__STATUS_UPDATED    0x0204
 151 #define DPCD_ADDR_ADJUST_REQUEST_LANE0_1        0x0206
 152 #define DPCD_ADDR_ADJUST_REQUEST_LANE2_3        0x0207
 153 #define DPCD_ADDR_TEST_REQUEST                  0x0218
 154 #define DPCD_ADDR_TEST_RESPONSE                 0x0260
 155 #define DPCD_ADDR_TEST_EDID_CHECKSUM            0x0261
 156 #define DPCD_ADDR_SINK_POWER_STATE              0x0600
 157
 158 /* DPCD_ADDR_MAX_LANE_COUNT */
 159 #define DPCD_ENHANCED_FRAME_CAP(x)              (((x) >> 7) & 0x1)
 160 #define DPCD_MAX_LANE_COUNT(x)                  ((x) & 0x1f)
 161
 162 /* DPCD_ADDR_LANE_COUNT_SET */
 163 #define DPCD_ENHANCED_FRAME_EN                  (0x1 << 7)
 164 #define DPCD_LANE_COUNT_SET(x)                  ((x) & 0x1f)
 165
 166 /* DPCD_ADDR_TRAINING_PATTERN_SET */
 167 #define DPCD_SCRAMBLING_DISABLED                (0x1 << 5)
 168 #define DPCD_SCRAMBLING_ENABLED                 (0x0 << 5)
 169 #define DPCD_TRAINING_PATTERN_2                 (0x2 << 0)
 170 #define DPCD_TRAINING_PATTERN_1                 (0x1 << 0)
 171 #define DPCD_TRAINING_PATTERN_DISABLED          (0x0 << 0)
 172
 173 /* DPCD_ADDR_TRAINING_LANE0_SET */
 174 #define DPCD_MAX_PRE_EMPHASIS_REACHED           (0x1 << 5)
 175 #define DPCD_PRE_EMPHASIS_SET(x)                (((x) & 0x3) << 3)
 176 #define DPCD_PRE_EMPHASIS_GET(x)                (((x) >> 3) & 0x3)
 177 #define DPCD_PRE_EMPHASIS_PATTERN2_LEVEL0       (0x0 << 3)
 178 #define DPCD_MAX_SWING_REACHED                  (0x1 << 2)
 179 #define DPCD_VOLTAGE_SWING_SET(x)               (((x) & 0x3) << 0)
 180 #define DPCD_VOLTAGE_SWING_GET(x)               (((x) >> 0) & 0x3)
 181 #define DPCD_VOLTAGE_SWING_PATTERN1_LEVEL0      (0x0 << 0)
 182
 183 /* DPCD_ADDR_LANE0_1_STATUS */
 184 #define DPCD_LANE_SYMBOL_LOCKED                 (0x1 << 2)
 185 #define DPCD_LANE_CHANNEL_EQ_DONE               (0x1 << 1)
 186 #define DPCD_LANE_CR_DONE                       (0x1 << 0)
 187 #define DPCD_CHANNEL_EQ_BITS                    (DPCD_LANE_CR_DONE|     \
 188                                                  DPCD_LANE_CHANNEL_EQ_DONE|\
 189                                                  DPCD_LANE_SYMBOL_LOCKED)
 190
 191 /* DPCD_ADDR_LANE_ALIGN__STATUS_UPDATED */
 192 #define DPCD_LINK_STATUS_UPDATED                (0x1 << 7)
 193 #define DPCD_DOWNSTREAM_PORT_STATUS_CHANGED     (0x1 << 6)
 194 #define DPCD_INTERLANE_ALIGN_DONE               (0x1 << 0)
 195
 196 /* DPCD_ADDR_TEST_REQUEST */
 197 #define DPCD_TEST_EDID_READ                     (0x1 << 2)
 198
 199 /* DPCD_ADDR_TEST_RESPONSE */
 200 #define DPCD_TEST_EDID_CHECKSUM_WRITE           (0x1 << 2)
 201
 202 /* DPCD_ADDR_SINK_POWER_STATE */
 203 #define DPCD_SET_POWER_STATE_D0                 (0x1 << 0)
 204 #define DPCD_SET_POWER_STATE_D4                 (0x2 << 0)
 205
 206 #endif /* _EXYNOS_DP_CORE_H */