1 /* 2 * Header file for Analogix DP (Display Port) core 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 _ANALOGIX_DP_CORE_H 14 #define _ANALOGIX_DP_CORE_H 15 16 #include <drm/drm_crtc.h> 17 #include <drm/drm_dp_helper.h> 18 19 #define DP_TIMEOUT_LOOP_COUNT 100 20 #define MAX_CR_LOOP 5 21 #define MAX_EQ_LOOP 5 22 23 /* Training takes 22ms if AUX channel comm fails. Use this as retry interval */ 24 #define DP_TIMEOUT_TRAINING_US 22000 25 #define DP_TIMEOUT_PSR_LOOP_MS 300 26 27 /* DP_MAX_LANE_COUNT */ 28 #define DPCD_ENHANCED_FRAME_CAP(x) (((x) >> 7) & 0x1) 29 #define DPCD_MAX_LANE_COUNT(x) ((x) & 0x1f) 30 31 /* DP_LANE_COUNT_SET */ 32 #define DPCD_LANE_COUNT_SET(x) ((x) & 0x1f) 33 34 /* DP_TRAINING_LANE0_SET */ 35 #define DPCD_PRE_EMPHASIS_SET(x) (((x) & 0x3) << 3) 36 #define DPCD_PRE_EMPHASIS_GET(x) (((x) >> 3) & 0x3) 37 #define DPCD_VOLTAGE_SWING_SET(x) (((x) & 0x3) << 0) 38 #define DPCD_VOLTAGE_SWING_GET(x) (((x) >> 0) & 0x3) 39 40 enum link_lane_count_type { 41 LANE_COUNT1 = 1, 42 LANE_COUNT2 = 2, 43 LANE_COUNT4 = 4 44 }; 45 46 enum link_training_state { 47 START, 48 CLOCK_RECOVERY, 49 EQUALIZER_TRAINING, 50 FINISHED, 51 FAILED 52 }; 53 54 enum voltage_swing_level { 55 VOLTAGE_LEVEL_0, 56 VOLTAGE_LEVEL_1, 57 VOLTAGE_LEVEL_2, 58 VOLTAGE_LEVEL_3, 59 }; 60 61 enum pre_emphasis_level { 62 PRE_EMPHASIS_LEVEL_0, 63 PRE_EMPHASIS_LEVEL_1, 64 PRE_EMPHASIS_LEVEL_2, 65 PRE_EMPHASIS_LEVEL_3, 66 }; 67 68 enum pattern_set { 69 PRBS7, 70 D10_2, 71 TRAINING_PTN1, 72 TRAINING_PTN2, 73 DP_NONE 74 }; 75 76 enum color_space { 77 COLOR_RGB, 78 COLOR_YCBCR422, 79 COLOR_YCBCR444 80 }; 81 82 enum color_depth { 83 COLOR_6, 84 COLOR_8, 85 COLOR_10, 86 COLOR_12 87 }; 88 89 enum color_coefficient { 90 COLOR_YCBCR601, 91 COLOR_YCBCR709 92 }; 93 94 enum dynamic_range { 95 VESA, 96 CEA 97 }; 98 99 enum pll_status { 100 PLL_UNLOCKED, 101 PLL_LOCKED 102 }; 103 104 enum clock_recovery_m_value_type { 105 CALCULATED_M, 106 REGISTER_M 107 }; 108 109 enum video_timing_recognition_type { 110 VIDEO_TIMING_FROM_CAPTURE, 111 VIDEO_TIMING_FROM_REGISTER 112 }; 113 114 enum analog_power_block { 115 AUX_BLOCK, 116 CH0_BLOCK, 117 CH1_BLOCK, 118 CH2_BLOCK, 119 CH3_BLOCK, 120 ANALOG_TOTAL, 121 POWER_ALL 122 }; 123 124 enum dp_irq_type { 125 DP_IRQ_TYPE_HP_CABLE_IN = BIT(0), 126 DP_IRQ_TYPE_HP_CABLE_OUT = BIT(1), 127 DP_IRQ_TYPE_HP_CHANGE = BIT(2), 128 DP_IRQ_TYPE_UNKNOWN = BIT(3), 129 }; 130 131 struct video_info { 132 char *name; 133 134 bool h_sync_polarity; 135 bool v_sync_polarity; 136 bool interlaced; 137 138 enum color_space color_space; 139 enum dynamic_range dynamic_range; 140 enum color_coefficient ycbcr_coeff; 141 enum color_depth color_depth; 142 143 int max_link_rate; 144 enum link_lane_count_type max_lane_count; 145 }; 146 147 struct link_train { 148 int eq_loop; 149 int cr_loop[4]; 150 151 u8 link_rate; 152 u8 lane_count; 153 u8 training_lane[4]; 154 155 enum link_training_state lt_state; 156 }; 157 158 struct analogix_dp_device { 159 struct drm_encoder *encoder; 160 struct device *dev; 161 struct drm_device *drm_dev; 162 struct drm_connector connector; 163 struct drm_bridge *bridge; 164 struct drm_dp_aux aux; 165 struct clk *clock; 166 unsigned int irq; 167 void __iomem *reg_base; 168 169 struct video_info video_info; 170 struct link_train link_train; 171 struct phy *phy; 172 int dpms_mode; 173 int hpd_gpio; 174 bool force_hpd; 175 bool psr_enable; 176 bool fast_train_support; 177 178 struct mutex panel_lock; 179 bool panel_is_modeset; 180 181 struct analogix_dp_plat_data *plat_data; 182 }; 183 184 /* analogix_dp_reg.c */ 185 void analogix_dp_enable_video_mute(struct analogix_dp_device *dp, bool enable); 186 void analogix_dp_stop_video(struct analogix_dp_device *dp); 187 void analogix_dp_lane_swap(struct analogix_dp_device *dp, bool enable); 188 void analogix_dp_init_analog_param(struct analogix_dp_device *dp); 189 void analogix_dp_init_interrupt(struct analogix_dp_device *dp); 190 void analogix_dp_reset(struct analogix_dp_device *dp); 191 void analogix_dp_swreset(struct analogix_dp_device *dp); 192 void analogix_dp_config_interrupt(struct analogix_dp_device *dp); 193 void analogix_dp_mute_hpd_interrupt(struct analogix_dp_device *dp); 194 void analogix_dp_unmute_hpd_interrupt(struct analogix_dp_device *dp); 195 enum pll_status analogix_dp_get_pll_lock_status(struct analogix_dp_device *dp); 196 void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable); 197 void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp, 198 enum analog_power_block block, 199 bool enable); 200 void analogix_dp_init_analog_func(struct analogix_dp_device *dp); 201 void analogix_dp_init_hpd(struct analogix_dp_device *dp); 202 void analogix_dp_force_hpd(struct analogix_dp_device *dp); 203 enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp); 204 void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp); 205 void analogix_dp_reset_aux(struct analogix_dp_device *dp); 206 void analogix_dp_init_aux(struct analogix_dp_device *dp); 207 int analogix_dp_get_plug_in_status(struct analogix_dp_device *dp); 208 void analogix_dp_enable_sw_function(struct analogix_dp_device *dp); 209 void analogix_dp_set_link_bandwidth(struct analogix_dp_device *dp, u32 bwtype); 210 void analogix_dp_get_link_bandwidth(struct analogix_dp_device *dp, u32 *bwtype); 211 void analogix_dp_set_lane_count(struct analogix_dp_device *dp, u32 count); 212 void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count); 213 void analogix_dp_enable_enhanced_mode(struct analogix_dp_device *dp, 214 bool enable); 215 void analogix_dp_set_training_pattern(struct analogix_dp_device *dp, 216 enum pattern_set pattern); 217 void analogix_dp_set_lane0_pre_emphasis(struct analogix_dp_device *dp, 218 u32 level); 219 void analogix_dp_set_lane1_pre_emphasis(struct analogix_dp_device *dp, 220 u32 level); 221 void analogix_dp_set_lane2_pre_emphasis(struct analogix_dp_device *dp, 222 u32 level); 223 void analogix_dp_set_lane3_pre_emphasis(struct analogix_dp_device *dp, 224 u32 level); 225 void analogix_dp_set_lane0_link_training(struct analogix_dp_device *dp, 226 u32 training_lane); 227 void analogix_dp_set_lane1_link_training(struct analogix_dp_device *dp, 228 u32 training_lane); 229 void analogix_dp_set_lane2_link_training(struct analogix_dp_device *dp, 230 u32 training_lane); 231 void analogix_dp_set_lane3_link_training(struct analogix_dp_device *dp, 232 u32 training_lane); 233 u32 analogix_dp_get_lane0_link_training(struct analogix_dp_device *dp); 234 u32 analogix_dp_get_lane1_link_training(struct analogix_dp_device *dp); 235 u32 analogix_dp_get_lane2_link_training(struct analogix_dp_device *dp); 236 u32 analogix_dp_get_lane3_link_training(struct analogix_dp_device *dp); 237 void analogix_dp_reset_macro(struct analogix_dp_device *dp); 238 void analogix_dp_init_video(struct analogix_dp_device *dp); 239 240 void analogix_dp_set_video_color_format(struct analogix_dp_device *dp); 241 int analogix_dp_is_slave_video_stream_clock_on(struct analogix_dp_device *dp); 242 void analogix_dp_set_video_cr_mn(struct analogix_dp_device *dp, 243 enum clock_recovery_m_value_type type, 244 u32 m_value, 245 u32 n_value); 246 void analogix_dp_set_video_timing_mode(struct analogix_dp_device *dp, u32 type); 247 void analogix_dp_enable_video_master(struct analogix_dp_device *dp, 248 bool enable); 249 void analogix_dp_start_video(struct analogix_dp_device *dp); 250 int analogix_dp_is_video_stream_on(struct analogix_dp_device *dp); 251 void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp); 252 void analogix_dp_enable_scrambling(struct analogix_dp_device *dp); 253 void analogix_dp_disable_scrambling(struct analogix_dp_device *dp); 254 void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp); 255 int analogix_dp_send_psr_spd(struct analogix_dp_device *dp, 256 struct edp_vsc_psr *vsc, bool blocking); 257 ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, 258 struct drm_dp_aux_msg *msg); 259 260 #endif /* _ANALOGIX_DP_CORE_H */ 261