These changes are the raw update to linux-4.4.6-rt14. Kernel sources
[kvmfornfv.git] / kernel / 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 drm_encoder      encoder;
151         struct device           *dev;
152         struct drm_device       *drm_dev;
153         struct drm_connector    connector;
154         struct drm_panel        *panel;
155         struct drm_bridge       *bridge;
156         struct clk              *clock;
157         unsigned int            irq;
158         void __iomem            *reg_base;
159
160         struct video_info       *video_info;
161         struct link_train       link_train;
162         struct work_struct      hotplug_work;
163         struct phy              *phy;
164         int                     dpms_mode;
165         int                     hpd_gpio;
166
167         struct exynos_drm_panel_info priv;
168 };
169
170 /* exynos_dp_reg.c */
171 void exynos_dp_enable_video_mute(struct exynos_dp_device *dp, bool enable);
172 void exynos_dp_stop_video(struct exynos_dp_device *dp);
173 void exynos_dp_lane_swap(struct exynos_dp_device *dp, bool enable);
174 void exynos_dp_init_analog_param(struct exynos_dp_device *dp);
175 void exynos_dp_init_interrupt(struct exynos_dp_device *dp);
176 void exynos_dp_reset(struct exynos_dp_device *dp);
177 void exynos_dp_swreset(struct exynos_dp_device *dp);
178 void exynos_dp_config_interrupt(struct exynos_dp_device *dp);
179 enum pll_status exynos_dp_get_pll_lock_status(struct exynos_dp_device *dp);
180 void exynos_dp_set_pll_power_down(struct exynos_dp_device *dp, bool enable);
181 void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp,
182                                 enum analog_power_block block,
183                                 bool enable);
184 void exynos_dp_init_analog_func(struct exynos_dp_device *dp);
185 void exynos_dp_init_hpd(struct exynos_dp_device *dp);
186 enum dp_irq_type exynos_dp_get_irq_type(struct exynos_dp_device *dp);
187 void exynos_dp_clear_hotplug_interrupts(struct exynos_dp_device *dp);
188 void exynos_dp_reset_aux(struct exynos_dp_device *dp);
189 void exynos_dp_init_aux(struct exynos_dp_device *dp);
190 int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp);
191 void exynos_dp_enable_sw_function(struct exynos_dp_device *dp);
192 int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp);
193 int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp,
194                                 unsigned int reg_addr,
195                                 unsigned char data);
196 int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp,
197                                 unsigned int reg_addr,
198                                 unsigned char *data);
199 int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp,
200                                 unsigned int reg_addr,
201                                 unsigned int count,
202                                 unsigned char data[]);
203 int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp,
204                                 unsigned int reg_addr,
205                                 unsigned int count,
206                                 unsigned char data[]);
207 int exynos_dp_select_i2c_device(struct exynos_dp_device *dp,
208                                 unsigned int device_addr,
209                                 unsigned int reg_addr);
210 int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp,
211                                 unsigned int device_addr,
212                                 unsigned int reg_addr,
213                                 unsigned int *data);
214 int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp,
215                                 unsigned int device_addr,
216                                 unsigned int reg_addr,
217                                 unsigned int count,
218                                 unsigned char edid[]);
219 void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype);
220 void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype);
221 void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count);
222 void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count);
223 void exynos_dp_enable_enhanced_mode(struct exynos_dp_device *dp, bool enable);
224 void exynos_dp_set_training_pattern(struct exynos_dp_device *dp,
225                                  enum pattern_set pattern);
226 void exynos_dp_set_lane0_pre_emphasis(struct exynos_dp_device *dp, u32 level);
227 void exynos_dp_set_lane1_pre_emphasis(struct exynos_dp_device *dp, u32 level);
228 void exynos_dp_set_lane2_pre_emphasis(struct exynos_dp_device *dp, u32 level);
229 void exynos_dp_set_lane3_pre_emphasis(struct exynos_dp_device *dp, u32 level);
230 void exynos_dp_set_lane0_link_training(struct exynos_dp_device *dp,
231                                 u32 training_lane);
232 void exynos_dp_set_lane1_link_training(struct exynos_dp_device *dp,
233                                 u32 training_lane);
234 void exynos_dp_set_lane2_link_training(struct exynos_dp_device *dp,
235                                 u32 training_lane);
236 void exynos_dp_set_lane3_link_training(struct exynos_dp_device *dp,
237                                 u32 training_lane);
238 u32 exynos_dp_get_lane0_link_training(struct exynos_dp_device *dp);
239 u32 exynos_dp_get_lane1_link_training(struct exynos_dp_device *dp);
240 u32 exynos_dp_get_lane2_link_training(struct exynos_dp_device *dp);
241 u32 exynos_dp_get_lane3_link_training(struct exynos_dp_device *dp);
242 void exynos_dp_reset_macro(struct exynos_dp_device *dp);
243 void exynos_dp_init_video(struct exynos_dp_device *dp);
244
245 void exynos_dp_set_video_color_format(struct exynos_dp_device *dp);
246 int exynos_dp_is_slave_video_stream_clock_on(struct exynos_dp_device *dp);
247 void exynos_dp_set_video_cr_mn(struct exynos_dp_device *dp,
248                         enum clock_recovery_m_value_type type,
249                         u32 m_value,
250                         u32 n_value);
251 void exynos_dp_set_video_timing_mode(struct exynos_dp_device *dp, u32 type);
252 void exynos_dp_enable_video_master(struct exynos_dp_device *dp, bool enable);
253 void exynos_dp_start_video(struct exynos_dp_device *dp);
254 int exynos_dp_is_video_stream_on(struct exynos_dp_device *dp);
255 void exynos_dp_config_video_slave_mode(struct exynos_dp_device *dp);
256 void exynos_dp_enable_scrambling(struct exynos_dp_device *dp);
257 void exynos_dp_disable_scrambling(struct exynos_dp_device *dp);
258
259 /* I2C EDID Chip ID, Slave Address */
260 #define I2C_EDID_DEVICE_ADDR                    0x50
261 #define I2C_E_EDID_DEVICE_ADDR                  0x30
262
263 #define EDID_BLOCK_LENGTH                       0x80
264 #define EDID_HEADER_PATTERN                     0x00
265 #define EDID_EXTENSION_FLAG                     0x7e
266 #define EDID_CHECKSUM                           0x7f
267
268 /* DP_MAX_LANE_COUNT */
269 #define DPCD_ENHANCED_FRAME_CAP(x)              (((x) >> 7) & 0x1)
270 #define DPCD_MAX_LANE_COUNT(x)                  ((x) & 0x1f)
271
272 /* DP_LANE_COUNT_SET */
273 #define DPCD_LANE_COUNT_SET(x)                  ((x) & 0x1f)
274
275 /* DP_TRAINING_LANE0_SET */
276 #define DPCD_PRE_EMPHASIS_SET(x)                (((x) & 0x3) << 3)
277 #define DPCD_PRE_EMPHASIS_GET(x)                (((x) >> 3) & 0x3)
278 #define DPCD_VOLTAGE_SWING_SET(x)               (((x) & 0x3) << 0)
279 #define DPCD_VOLTAGE_SWING_GET(x)               (((x) >> 0) & 0x3)
280
281 #endif /* _EXYNOS_DP_CORE_H */