drivers/gpu/drm/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 #include <video/exynos_dp.h>
  17
  18 enum dp_irq_type {
  19         DP_IRQ_TYPE_HP_CABLE_IN,
  20         DP_IRQ_TYPE_HP_CABLE_OUT,
  21         DP_IRQ_TYPE_HP_CHANGE,
  22         DP_IRQ_TYPE_UNKNOWN,
  23 };
  24
  25 struct link_train {
  26         int eq_loop;
  27         int cr_loop[4];
  28
  29         u8 link_rate;
  30         u8 lane_count;
  31         u8 training_lane[4];
  32
  33         enum link_training_state lt_state;
  34 };
  35
  36 struct dp_phy_ops {
  37         void (*phy_init)(void);
  38         void (*phy_exit)(void);
  39 };
  40
  41 struct exynos_dp_device {
  42         struct device           *dev;
  43         struct drm_device       *drm_dev;
  44         struct resource         *res;
  45         struct clk              *clock;
  46         unsigned int            irq;
  47         void __iomem            *reg_base;
  48         int                     hpd_gpio;
  49
  50         struct dp_phy_ops       phy_ops;
  51         struct video_info       *video_info;
  52         enum link_training_type training_type;
  53         struct link_train       link_train;
  54         struct work_struct      hotplug_work;
  55 };
  56
  57 /* exynos_dp_reg.c */
  58 void exynos_dp_enable_video_mute(struct exynos_dp_device *dp, bool enable);
  59 void exynos_dp_stop_video(struct exynos_dp_device *dp);
  60 void exynos_dp_lane_swap(struct exynos_dp_device *dp, bool enable);
  61 void exynos_dp_init_interrupt(struct exynos_dp_device *dp);
  62 void exynos_dp_reset(struct exynos_dp_device *dp);
  63 enum pll_status exynos_dp_get_pll_lock_status(struct exynos_dp_device *dp);
  64 void exynos_dp_set_pll_power_down(struct exynos_dp_device *dp, bool enable);
  65 void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp,
  66                                 enum analog_power_block block,
  67                                 bool enable);
  68 void exynos_dp_init_analog_func(struct exynos_dp_device *dp);
  69 void exynos_dp_init_hpd(struct exynos_dp_device *dp);
  70 void exynos_dp_disable_hpd(struct exynos_dp_device *dp);
  71 enum dp_irq_type exynos_dp_get_irq_type(struct exynos_dp_device *dp);
  72 void exynos_dp_clear_hotplug_interrupts(struct exynos_dp_device *dp);
  73 void exynos_dp_reset_aux(struct exynos_dp_device *dp);
  74 void exynos_dp_init_aux(struct exynos_dp_device *dp);
  75 int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp);
  76 void exynos_dp_enable_sw_function(struct exynos_dp_device *dp);
  77 int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp);
  78 int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp,
  79                                 unsigned int reg_addr,
  80                                 unsigned char data);
  81 int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp,
  82                                 unsigned int reg_addr,
  83                                 unsigned char *data);
  84 int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp,
  85                                 unsigned int reg_addr,
  86                                 unsigned int count,
  87                                 unsigned char data[]);
  88 int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp,
  89                                 unsigned int reg_addr,
  90                                 unsigned int count,
  91                                 unsigned char data[]);
  92 int exynos_dp_select_i2c_device(struct exynos_dp_device *dp,
  93                                 unsigned int device_addr,
  94                                 unsigned int reg_addr);
  95 int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp,
  96                                 unsigned int device_addr,
  97                                 unsigned int reg_addr,
  98                                 unsigned int *data);
  99 int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp,
 100                                 unsigned int device_addr,
 101                                 unsigned int reg_addr,
 102                                 unsigned int count,
 103                                 unsigned char edid[]);
 104 void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype);
 105 void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype);
 106 void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count);
 107 void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count);
 108 void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype);
 109 void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype);
 110 void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count);
 111 void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count);
 112 void exynos_dp_enable_enhanced_mode(struct exynos_dp_device *dp, bool enable);
 113 void exynos_dp_set_training_pattern(struct exynos_dp_device *dp,
 114                                  enum pattern_set pattern);
 115 void exynos_dp_set_lane0_pre_emphasis(struct exynos_dp_device *dp, u32 level);
 116 void exynos_dp_set_lane1_pre_emphasis(struct exynos_dp_device *dp, u32 level);
 117 void exynos_dp_set_lane2_pre_emphasis(struct exynos_dp_device *dp, u32 level);
 118 void exynos_dp_set_lane3_pre_emphasis(struct exynos_dp_device *dp, u32 level);
 119 void exynos_dp_set_lane0_link_training(struct exynos_dp_device *dp,
 120                                 u32 training_lane);
 121 void exynos_dp_set_lane1_link_training(struct exynos_dp_device *dp,
 122                                 u32 training_lane);
 123 void exynos_dp_set_lane2_link_training(struct exynos_dp_device *dp,
 124                                 u32 training_lane);
 125 void exynos_dp_set_lane3_link_training(struct exynos_dp_device *dp,
 126                                 u32 training_lane);
 127 u32 exynos_dp_get_lane0_link_training(struct exynos_dp_device *dp);
 128 u32 exynos_dp_get_lane1_link_training(struct exynos_dp_device *dp);
 129 u32 exynos_dp_get_lane2_link_training(struct exynos_dp_device *dp);
 130 u32 exynos_dp_get_lane3_link_training(struct exynos_dp_device *dp);
 131 void exynos_dp_reset_macro(struct exynos_dp_device *dp);
 132 int exynos_dp_init_video(struct exynos_dp_device *dp);
 133
 134 void exynos_dp_set_video_color_format(struct exynos_dp_device *dp);
 135 int exynos_dp_is_slave_video_stream_clock_on(struct exynos_dp_device *dp);
 136 void exynos_dp_set_video_cr_mn(struct exynos_dp_device *dp,
 137                         enum clock_recovery_m_value_type type,
 138                         u32 m_value,
 139                         u32 n_value);
 140 void exynos_dp_set_video_timing_mode(struct exynos_dp_device *dp, u32 type);
 141 void exynos_dp_enable_video_master(struct exynos_dp_device *dp, bool enable);
 142 void exynos_dp_start_video(struct exynos_dp_device *dp);
 143 int exynos_dp_is_video_stream_on(struct exynos_dp_device *dp);
 144 void exynos_dp_config_video_slave_mode(struct exynos_dp_device *dp);
 145 void exynos_dp_enable_scrambling(struct exynos_dp_device *dp);
 146 void exynos_dp_disable_scrambling(struct exynos_dp_device *dp);
 147
 148 int exynos_dp_enable_hw_link_training(struct exynos_dp_device *dp);
 149
 150 /* I2C EDID Chip ID, Slave Address */
 151 #define I2C_EDID_DEVICE_ADDR                    0x50
 152 #define I2C_E_EDID_DEVICE_ADDR                  0x30
 153
 154 #define EDID_BLOCK_LENGTH                       0x80
 155 #define EDID_HEADER_PATTERN                     0x00
 156 #define EDID_EXTENSION_FLAG                     0x7e
 157 #define EDID_CHECKSUM                           0x7f
 158
 159 /* Definition for DPCD Register */
 160 #define DPCD_ADDR_DPCD_REV                      0x0000
 161 #define DPCD_ADDR_MAX_LINK_RATE                 0x0001
 162 #define DPCD_ADDR_MAX_LANE_COUNT                0x0002
 163 #define DPCD_ADDR_LINK_BW_SET                   0x0100
 164 #define DPCD_ADDR_LANE_COUNT_SET                0x0101
 165 #define DPCD_ADDR_TRAINING_PATTERN_SET          0x0102
 166 #define DPCD_ADDR_TRAINING_LANE0_SET            0x0103
 167 #define DPCD_ADDR_LANE0_1_STATUS                0x0202
 168 #define DPCD_ADDR_LANE_ALIGN__STATUS_UPDATED    0x0204
 169 #define DPCD_ADDR_ADJUST_REQUEST_LANE0_1        0x0206
 170 #define DPCD_ADDR_ADJUST_REQUEST_LANE2_3        0x0207
 171 #define DPCD_ADDR_TEST_REQUEST                  0x0218
 172 #define DPCD_ADDR_TEST_RESPONSE                 0x0260
 173 #define DPCD_ADDR_TEST_EDID_CHECKSUM            0x0261
 174 #define DPCD_ADDR_SINK_POWER_STATE              0x0600
 175
 176 /* DPCD_ADDR_MAX_LANE_COUNT */
 177 #define DPCD_ENHANCED_FRAME_CAP(x)              (((x) >> 7) & 0x1)
 178 #define DPCD_MAX_LANE_COUNT(x)                  ((x) & 0x1f)
 179
 180 /* DPCD_ADDR_LANE_COUNT_SET */
 181 #define DPCD_ENHANCED_FRAME_EN                  (0x1 << 7)
 182 #define DPCD_LANE_COUNT_SET(x)                  ((x) & 0x1f)
 183
 184 /* DPCD_ADDR_TRAINING_PATTERN_SET */
 185 #define DPCD_SCRAMBLING_DISABLED                (0x1 << 5)
 186 #define DPCD_SCRAMBLING_ENABLED                 (0x0 << 5)
 187 #define DPCD_TRAINING_PATTERN_2                 (0x2 << 0)
 188 #define DPCD_TRAINING_PATTERN_1                 (0x1 << 0)
 189 #define DPCD_TRAINING_PATTERN_DISABLED          (0x0 << 0)
 190
 191 /* DPCD_ADDR_TRAINING_LANE0_SET */
 192 #define DPCD_MAX_PRE_EMPHASIS_REACHED           (0x1 << 5)
 193 #define DPCD_PRE_EMPHASIS_SET(x)                (((x) & 0x3) << 3)
 194 #define DPCD_PRE_EMPHASIS_GET(x)                (((x) >> 3) & 0x3)
 195 #define DPCD_PRE_EMPHASIS_PATTERN2_LEVEL0       (0x0 << 3)
 196 #define DPCD_MAX_SWING_REACHED                  (0x1 << 2)
 197 #define DPCD_VOLTAGE_SWING_SET(x)               (((x) & 0x3) << 0)
 198 #define DPCD_VOLTAGE_SWING_GET(x)               (((x) >> 0) & 0x3)
 199 #define DPCD_VOLTAGE_SWING_PATTERN1_LEVEL0      (0x0 << 0)
 200
 201 /* DPCD_ADDR_LANE0_1_STATUS */
 202 #define DPCD_LANE_SYMBOL_LOCKED                 (0x1 << 2)
 203 #define DPCD_LANE_CHANNEL_EQ_DONE               (0x1 << 1)
 204 #define DPCD_LANE_CR_DONE                       (0x1 << 0)
 205 #define DPCD_CHANNEL_EQ_BITS                    (DPCD_LANE_CR_DONE|     \
 206                                                  DPCD_LANE_CHANNEL_EQ_DONE|\
 207                                                  DPCD_LANE_SYMBOL_LOCKED)
 208
 209 /* DPCD_ADDR_LANE_ALIGN__STATUS_UPDATED */
 210 #define DPCD_LINK_STATUS_UPDATED                (0x1 << 7)
 211 #define DPCD_DOWNSTREAM_PORT_STATUS_CHANGED     (0x1 << 6)
 212 #define DPCD_INTERLANE_ALIGN_DONE               (0x1 << 0)
 213
 214 /* DPCD_ADDR_TEST_REQUEST */
 215 #define DPCD_TEST_EDID_READ                     (0x1 << 2)
 216
 217 /* DPCD_ADDR_TEST_RESPONSE */
 218 #define DPCD_TEST_EDID_CHECKSUM_WRITE           (0x1 << 2)
 219
 220 /* DPCD_ADDR_SINK_POWER_STATE */
 221 #define DPCD_SET_POWER_STATE_D0                 (0x1 << 0)
 222 #define DPCD_SET_POWER_STATE_D4                 (0x2 << 0)
 223
 224 #endif /* _EXYNOS_DP_CORE_H */