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 clk              *clock;
  30         unsigned int            irq;
  31         void __iomem            *reg_base;
  32
  33         struct video_info       *video_info;
  34         struct link_train       link_train;
  35 };
  36
  37 /* exynos_dp_reg.c */
  38 void exynos_dp_enable_video_mute(struct exynos_dp_device *dp, bool enable);
  39 void exynos_dp_stop_video(struct exynos_dp_device *dp);
  40 void exynos_dp_lane_swap(struct exynos_dp_device *dp, bool enable);
  41 void exynos_dp_init_analog_param(struct exynos_dp_device *dp);
  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_swreset(struct exynos_dp_device *dp);
  45 void exynos_dp_config_interrupt(struct exynos_dp_device *dp);
  46 enum pll_status exynos_dp_get_pll_lock_status(struct exynos_dp_device *dp);
  47 void exynos_dp_set_pll_power_down(struct exynos_dp_device *dp, bool enable);
  48 void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp,
  49                                 enum analog_power_block block,
  50                                 bool enable);
  51 void exynos_dp_init_analog_func(struct exynos_dp_device *dp);
  52 void exynos_dp_init_hpd(struct exynos_dp_device *dp);
  53 void exynos_dp_reset_aux(struct exynos_dp_device *dp);
  54 void exynos_dp_init_aux(struct exynos_dp_device *dp);
  55 int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp);
  56 void exynos_dp_enable_sw_function(struct exynos_dp_device *dp);
  57 int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp);
  58 int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp,
  59                                 unsigned int reg_addr,
  60                                 unsigned char data);
  61 int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp,
  62                                 unsigned int reg_addr,
  63                                 unsigned char *data);
  64 int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp,
  65                                 unsigned int reg_addr,
  66                                 unsigned int count,
  67                                 unsigned char data[]);
  68 int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp,
  69                                 unsigned int reg_addr,
  70                                 unsigned int count,
  71                                 unsigned char data[]);
  72 int exynos_dp_select_i2c_device(struct exynos_dp_device *dp,
  73                                 unsigned int device_addr,
  74                                 unsigned int reg_addr);
  75 int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp,
  76                                 unsigned int device_addr,
  77                                 unsigned int reg_addr,
  78                                 unsigned int *data);
  79 int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp,
  80                                 unsigned int device_addr,
  81                                 unsigned int reg_addr,
  82                                 unsigned int count,
  83                                 unsigned char edid[]);
  84 void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype);
  85 void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype);
  86 void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count);
  87 void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count);
  88 void exynos_dp_enable_enhanced_mode(struct exynos_dp_device *dp, bool enable);
  89 void exynos_dp_set_training_pattern(struct exynos_dp_device *dp,
  90                                  enum pattern_set pattern);
  91 void exynos_dp_set_lane0_pre_emphasis(struct exynos_dp_device *dp, u32 level);
  92 void exynos_dp_set_lane1_pre_emphasis(struct exynos_dp_device *dp, u32 level);
  93 void exynos_dp_set_lane2_pre_emphasis(struct exynos_dp_device *dp, u32 level);
  94 void exynos_dp_set_lane3_pre_emphasis(struct exynos_dp_device *dp, u32 level);
  95 void exynos_dp_set_lane0_link_training(struct exynos_dp_device *dp,
  96                                 u32 training_lane);
  97 void exynos_dp_set_lane1_link_training(struct exynos_dp_device *dp,
  98                                 u32 training_lane);
  99 void exynos_dp_set_lane2_link_training(struct exynos_dp_device *dp,
 100                                 u32 training_lane);
 101 void exynos_dp_set_lane3_link_training(struct exynos_dp_device *dp,
 102                                 u32 training_lane);
 103 u32 exynos_dp_get_lane0_link_training(struct exynos_dp_device *dp);
 104 u32 exynos_dp_get_lane1_link_training(struct exynos_dp_device *dp);
 105 u32 exynos_dp_get_lane2_link_training(struct exynos_dp_device *dp);
 106 u32 exynos_dp_get_lane3_link_training(struct exynos_dp_device *dp);
 107 void exynos_dp_reset_macro(struct exynos_dp_device *dp);
 108 int exynos_dp_init_video(struct exynos_dp_device *dp);
 109
 110 void exynos_dp_set_video_color_format(struct exynos_dp_device *dp,
 111                                 u32 color_depth,
 112                                 u32 color_space,
 113                                 u32 dynamic_range,
 114                                 u32 ycbcr_coeff);
 115 int exynos_dp_is_slave_video_stream_clock_on(struct exynos_dp_device *dp);
 116 void exynos_dp_set_video_cr_mn(struct exynos_dp_device *dp,
 117                         enum clock_recovery_m_value_type type,
 118                         u32 m_value,
 119                         u32 n_value);
 120 void exynos_dp_set_video_timing_mode(struct exynos_dp_device *dp, u32 type);
 121 void exynos_dp_enable_video_master(struct exynos_dp_device *dp, bool enable);
 122 void exynos_dp_start_video(struct exynos_dp_device *dp);
 123 int exynos_dp_is_video_stream_on(struct exynos_dp_device *dp);
 124 void exynos_dp_config_video_slave_mode(struct exynos_dp_device *dp,
 125                         struct video_info *video_info);
 126 void exynos_dp_enable_scrambling(struct exynos_dp_device *dp);
 127 void exynos_dp_disable_scrambling(struct exynos_dp_device *dp);
 128
 129 /* I2C EDID Chip ID, Slave Address */
 130 #define I2C_EDID_DEVICE_ADDR                    0x50
 131 #define I2C_E_EDID_DEVICE_ADDR                  0x30
 132
 133 #define EDID_BLOCK_LENGTH                       0x80
 134 #define EDID_HEADER_PATTERN                     0x00
 135 #define EDID_EXTENSION_FLAG                     0x7e
 136 #define EDID_CHECKSUM                           0x7f
 137
 138 /* Definition for DPCD Register */
 139 #define DPCD_ADDR_DPCD_REV                      0x0000
 140 #define DPCD_ADDR_MAX_LINK_RATE                 0x0001
 141 #define DPCD_ADDR_MAX_LANE_COUNT                0x0002
 142 #define DPCD_ADDR_LINK_BW_SET                   0x0100
 143 #define DPCD_ADDR_LANE_COUNT_SET                0x0101
 144 #define DPCD_ADDR_TRAINING_PATTERN_SET          0x0102
 145 #define DPCD_ADDR_TRAINING_LANE0_SET            0x0103
 146 #define DPCD_ADDR_LANE0_1_STATUS                0x0202
 147 #define DPCD_ADDR_LANE_ALIGN_STATUS_UPDATED     0x0204
 148 #define DPCD_ADDR_ADJUST_REQUEST_LANE0_1        0x0206
 149 #define DPCD_ADDR_ADJUST_REQUEST_LANE2_3        0x0207
 150 #define DPCD_ADDR_TEST_REQUEST                  0x0218
 151 #define DPCD_ADDR_TEST_RESPONSE                 0x0260
 152 #define DPCD_ADDR_TEST_EDID_CHECKSUM            0x0261
 153 #define DPCD_ADDR_SINK_POWER_STATE              0x0600
 154
 155 /* DPCD_ADDR_MAX_LANE_COUNT */
 156 #define DPCD_ENHANCED_FRAME_CAP(x)              (((x) >> 7) & 0x1)
 157 #define DPCD_MAX_LANE_COUNT(x)                  ((x) & 0x1f)
 158
 159 /* DPCD_ADDR_LANE_COUNT_SET */
 160 #define DPCD_ENHANCED_FRAME_EN                  (0x1 << 7)
 161 #define DPCD_LANE_COUNT_SET(x)                  ((x) & 0x1f)
 162
 163 /* DPCD_ADDR_TRAINING_PATTERN_SET */
 164 #define DPCD_SCRAMBLING_DISABLED                (0x1 << 5)
 165 #define DPCD_SCRAMBLING_ENABLED                 (0x0 << 5)
 166 #define DPCD_TRAINING_PATTERN_2                 (0x2 << 0)
 167 #define DPCD_TRAINING_PATTERN_1                 (0x1 << 0)
 168 #define DPCD_TRAINING_PATTERN_DISABLED          (0x0 << 0)
 169
 170 /* DPCD_ADDR_TRAINING_LANE0_SET */
 171 #define DPCD_MAX_PRE_EMPHASIS_REACHED           (0x1 << 5)
 172 #define DPCD_PRE_EMPHASIS_SET(x)                (((x) & 0x3) << 3)
 173 #define DPCD_PRE_EMPHASIS_GET(x)                (((x) >> 3) & 0x3)
 174 #define DPCD_PRE_EMPHASIS_PATTERN2_LEVEL0       (0x0 << 3)
 175 #define DPCD_MAX_SWING_REACHED                  (0x1 << 2)
 176 #define DPCD_VOLTAGE_SWING_SET(x)               (((x) & 0x3) << 0)
 177 #define DPCD_VOLTAGE_SWING_GET(x)               (((x) >> 0) & 0x3)
 178 #define DPCD_VOLTAGE_SWING_PATTERN1_LEVEL0      (0x0 << 0)
 179
 180 /* DPCD_ADDR_LANE0_1_STATUS */
 181 #define DPCD_LANE_SYMBOL_LOCKED                 (0x1 << 2)
 182 #define DPCD_LANE_CHANNEL_EQ_DONE               (0x1 << 1)
 183 #define DPCD_LANE_CR_DONE                       (0x1 << 0)
 184 #define DPCD_CHANNEL_EQ_BITS                    (DPCD_LANE_CR_DONE|     \
 185                                                  DPCD_LANE_CHANNEL_EQ_DONE|\
 186                                                  DPCD_LANE_SYMBOL_LOCKED)
 187
 188 /* DPCD_ADDR_LANE_ALIGN__STATUS_UPDATED */
 189 #define DPCD_LINK_STATUS_UPDATED                (0x1 << 7)
 190 #define DPCD_DOWNSTREAM_PORT_STATUS_CHANGED     (0x1 << 6)
 191 #define DPCD_INTERLANE_ALIGN_DONE               (0x1 << 0)
 192
 193 /* DPCD_ADDR_TEST_REQUEST */
 194 #define DPCD_TEST_EDID_READ                     (0x1 << 2)
 195
 196 /* DPCD_ADDR_TEST_RESPONSE */
 197 #define DPCD_TEST_EDID_CHECKSUM_WRITE           (0x1 << 2)
 198
 199 /* DPCD_ADDR_SINK_POWER_STATE */
 200 #define DPCD_SET_POWER_STATE_D0                 (0x1 << 0)
 201 #define DPCD_SET_POWER_STATE_D4                 (0x2 << 0)
 202
 203 #endif /* _EXYNOS_DP_CORE_H */