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 <drm/drm_crtc.h>
  17 #include <drm/drm_dp_helper.h>
  18 #include <drm/exynos_drm.h>
  19
  20 #include "exynos_drm_drv.h"
  21
  22 #define DP_TIMEOUT_LOOP_COUNT 100
  23 #define MAX_CR_LOOP 5
  24 #define MAX_EQ_LOOP 5
  25
  26 enum link_rate_type {
  27         LINK_RATE_1_62GBPS = 0x06,
  28         LINK_RATE_2_70GBPS = 0x0a
  29 };
  30
  31 enum link_lane_count_type {
  32         LANE_COUNT1 = 1,
  33         LANE_COUNT2 = 2,
  34         LANE_COUNT4 = 4
  35 };
  36
  37 enum link_training_state {
  38         START,
  39         CLOCK_RECOVERY,
  40         EQUALIZER_TRAINING,
  41         FINISHED,
  42         FAILED
  43 };
  44
  45 enum voltage_swing_level {
  46         VOLTAGE_LEVEL_0,
  47         VOLTAGE_LEVEL_1,
  48         VOLTAGE_LEVEL_2,
  49         VOLTAGE_LEVEL_3,
  50 };
  51
  52 enum pre_emphasis_level {
  53         PRE_EMPHASIS_LEVEL_0,
  54         PRE_EMPHASIS_LEVEL_1,
  55         PRE_EMPHASIS_LEVEL_2,
  56         PRE_EMPHASIS_LEVEL_3,
  57 };
  58
  59 enum pattern_set {
  60         PRBS7,
  61         D10_2,
  62         TRAINING_PTN1,
  63         TRAINING_PTN2,
  64         DP_NONE
  65 };
  66
  67 enum color_space {
  68         COLOR_RGB,
  69         COLOR_YCBCR422,
  70         COLOR_YCBCR444
  71 };
  72
  73 enum color_depth {
  74         COLOR_6,
  75         COLOR_8,
  76         COLOR_10,
  77         COLOR_12
  78 };
  79
  80 enum color_coefficient {
  81         COLOR_YCBCR601,
  82         COLOR_YCBCR709
  83 };
  84
  85 enum dynamic_range {
  86         VESA,
  87         CEA
  88 };
  89
  90 enum pll_status {
  91         PLL_UNLOCKED,
  92         PLL_LOCKED
  93 };
  94
  95 enum clock_recovery_m_value_type {
  96         CALCULATED_M,
  97         REGISTER_M
  98 };
  99
 100 enum video_timing_recognition_type {
 101         VIDEO_TIMING_FROM_CAPTURE,
 102         VIDEO_TIMING_FROM_REGISTER
 103 };
 104
 105 enum analog_power_block {
 106         AUX_BLOCK,
 107         CH0_BLOCK,
 108         CH1_BLOCK,
 109         CH2_BLOCK,
 110         CH3_BLOCK,
 111         ANALOG_TOTAL,
 112         POWER_ALL
 113 };
 114
 115 enum dp_irq_type {
 116         DP_IRQ_TYPE_HP_CABLE_IN,
 117         DP_IRQ_TYPE_HP_CABLE_OUT,
 118         DP_IRQ_TYPE_HP_CHANGE,
 119         DP_IRQ_TYPE_UNKNOWN,
 120 };
 121
 122 struct video_info {
 123         char *name;
 124
 125         bool h_sync_polarity;
 126         bool v_sync_polarity;
 127         bool interlaced;
 128
 129         enum color_space color_space;
 130         enum dynamic_range dynamic_range;
 131         enum color_coefficient ycbcr_coeff;
 132         enum color_depth color_depth;
 133
 134         enum link_rate_type link_rate;
 135         enum link_lane_count_type lane_count;
 136 };
 137
 138 struct link_train {
 139         int eq_loop;
 140         int cr_loop[4];
 141
 142         u8 link_rate;
 143         u8 lane_count;
 144         u8 training_lane[4];
 145
 146         enum link_training_state lt_state;
 147 };
 148
 149 struct exynos_dp_device {
 150         struct exynos_drm_display display;
 151         struct device           *dev;
 152         struct drm_device       *drm_dev;
 153         struct drm_connector    connector;
 154         struct drm_encoder      *encoder;
 155         struct drm_panel        *panel;
 156         struct drm_bridge       *bridge;
 157         struct clk              *clock;
 158         unsigned int            irq;
 159         void __iomem            *reg_base;
 160
 161         struct video_info       *video_info;
 162         struct link_train       link_train;
 163         struct work_struct      hotplug_work;
 164         struct phy              *phy;
 165         int                     dpms_mode;
 166         int                     hpd_gpio;
 167
 168         struct exynos_drm_panel_info priv;
 169 };
 170
 171 /* exynos_dp_reg.c */
 172 void exynos_dp_enable_video_mute(struct exynos_dp_device *dp, bool enable);
 173 void exynos_dp_stop_video(struct exynos_dp_device *dp);
 174 void exynos_dp_lane_swap(struct exynos_dp_device *dp, bool enable);
 175 void exynos_dp_init_analog_param(struct exynos_dp_device *dp);
 176 void exynos_dp_init_interrupt(struct exynos_dp_device *dp);
 177 void exynos_dp_reset(struct exynos_dp_device *dp);
 178 void exynos_dp_swreset(struct exynos_dp_device *dp);
 179 void exynos_dp_config_interrupt(struct exynos_dp_device *dp);
 180 enum pll_status exynos_dp_get_pll_lock_status(struct exynos_dp_device *dp);
 181 void exynos_dp_set_pll_power_down(struct exynos_dp_device *dp, bool enable);
 182 void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp,
 183                                 enum analog_power_block block,
 184                                 bool enable);
 185 void exynos_dp_init_analog_func(struct exynos_dp_device *dp);
 186 void exynos_dp_init_hpd(struct exynos_dp_device *dp);
 187 enum dp_irq_type exynos_dp_get_irq_type(struct exynos_dp_device *dp);
 188 void exynos_dp_clear_hotplug_interrupts(struct exynos_dp_device *dp);
 189 void exynos_dp_reset_aux(struct exynos_dp_device *dp);
 190 void exynos_dp_init_aux(struct exynos_dp_device *dp);
 191 int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp);
 192 void exynos_dp_enable_sw_function(struct exynos_dp_device *dp);
 193 int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp);
 194 int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp,
 195                                 unsigned int reg_addr,
 196                                 unsigned char data);
 197 int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp,
 198                                 unsigned int reg_addr,
 199                                 unsigned char *data);
 200 int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp,
 201                                 unsigned int reg_addr,
 202                                 unsigned int count,
 203                                 unsigned char data[]);
 204 int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp,
 205                                 unsigned int reg_addr,
 206                                 unsigned int count,
 207                                 unsigned char data[]);
 208 int exynos_dp_select_i2c_device(struct exynos_dp_device *dp,
 209                                 unsigned int device_addr,
 210                                 unsigned int reg_addr);
 211 int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp,
 212                                 unsigned int device_addr,
 213                                 unsigned int reg_addr,
 214                                 unsigned int *data);
 215 int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp,
 216                                 unsigned int device_addr,
 217                                 unsigned int reg_addr,
 218                                 unsigned int count,
 219                                 unsigned char edid[]);
 220 void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype);
 221 void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype);
 222 void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count);
 223 void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count);
 224 void exynos_dp_enable_enhanced_mode(struct exynos_dp_device *dp, bool enable);
 225 void exynos_dp_set_training_pattern(struct exynos_dp_device *dp,
 226                                  enum pattern_set pattern);
 227 void exynos_dp_set_lane0_pre_emphasis(struct exynos_dp_device *dp, u32 level);
 228 void exynos_dp_set_lane1_pre_emphasis(struct exynos_dp_device *dp, u32 level);
 229 void exynos_dp_set_lane2_pre_emphasis(struct exynos_dp_device *dp, u32 level);
 230 void exynos_dp_set_lane3_pre_emphasis(struct exynos_dp_device *dp, u32 level);
 231 void exynos_dp_set_lane0_link_training(struct exynos_dp_device *dp,
 232                                 u32 training_lane);
 233 void exynos_dp_set_lane1_link_training(struct exynos_dp_device *dp,
 234                                 u32 training_lane);
 235 void exynos_dp_set_lane2_link_training(struct exynos_dp_device *dp,
 236                                 u32 training_lane);
 237 void exynos_dp_set_lane3_link_training(struct exynos_dp_device *dp,
 238                                 u32 training_lane);
 239 u32 exynos_dp_get_lane0_link_training(struct exynos_dp_device *dp);
 240 u32 exynos_dp_get_lane1_link_training(struct exynos_dp_device *dp);
 241 u32 exynos_dp_get_lane2_link_training(struct exynos_dp_device *dp);
 242 u32 exynos_dp_get_lane3_link_training(struct exynos_dp_device *dp);
 243 void exynos_dp_reset_macro(struct exynos_dp_device *dp);
 244 void exynos_dp_init_video(struct exynos_dp_device *dp);
 245
 246 void exynos_dp_set_video_color_format(struct exynos_dp_device *dp);
 247 int exynos_dp_is_slave_video_stream_clock_on(struct exynos_dp_device *dp);
 248 void exynos_dp_set_video_cr_mn(struct exynos_dp_device *dp,
 249                         enum clock_recovery_m_value_type type,
 250                         u32 m_value,
 251                         u32 n_value);
 252 void exynos_dp_set_video_timing_mode(struct exynos_dp_device *dp, u32 type);
 253 void exynos_dp_enable_video_master(struct exynos_dp_device *dp, bool enable);
 254 void exynos_dp_start_video(struct exynos_dp_device *dp);
 255 int exynos_dp_is_video_stream_on(struct exynos_dp_device *dp);
 256 void exynos_dp_config_video_slave_mode(struct exynos_dp_device *dp);
 257 void exynos_dp_enable_scrambling(struct exynos_dp_device *dp);
 258 void exynos_dp_disable_scrambling(struct exynos_dp_device *dp);
 259
 260 /* I2C EDID Chip ID, Slave Address */
 261 #define I2C_EDID_DEVICE_ADDR                    0x50
 262 #define I2C_E_EDID_DEVICE_ADDR                  0x30
 263
 264 #define EDID_BLOCK_LENGTH                       0x80
 265 #define EDID_HEADER_PATTERN                     0x00
 266 #define EDID_EXTENSION_FLAG                     0x7e
 267 #define EDID_CHECKSUM                           0x7f
 268
 269 /* DP_MAX_LANE_COUNT */
 270 #define DPCD_ENHANCED_FRAME_CAP(x)              (((x) >> 7) & 0x1)
 271 #define DPCD_MAX_LANE_COUNT(x)                  ((x) & 0x1f)
 272
 273 /* DP_LANE_COUNT_SET */
 274 #define DPCD_LANE_COUNT_SET(x)                  ((x) & 0x1f)
 275
 276 /* DP_TRAINING_LANE0_SET */
 277 #define DPCD_PRE_EMPHASIS_SET(x)                (((x) & 0x3) << 3)
 278 #define DPCD_PRE_EMPHASIS_GET(x)                (((x) >> 3) & 0x3)
 279 #define DPCD_VOLTAGE_SWING_SET(x)               (((x) & 0x3) << 0)
 280 #define DPCD_VOLTAGE_SWING_GET(x)               (((x) >> 0) & 0x3)
 281
 282 #endif /* _EXYNOS_DP_CORE_H */