Merge tag 'for-linus-20140905' of git://git.infradead.org/linux-mtd
[firefly-linux-kernel-4.4.55.git] / 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 #define DP_TIMEOUT_LOOP_COUNT 100
21 #define MAX_CR_LOOP 5
22 #define MAX_EQ_LOOP 5
23
24 enum link_rate_type {
25         LINK_RATE_1_62GBPS = 0x06,
26         LINK_RATE_2_70GBPS = 0x0a
27 };
28
29 enum link_lane_count_type {
30         LANE_COUNT1 = 1,
31         LANE_COUNT2 = 2,
32         LANE_COUNT4 = 4
33 };
34
35 enum link_training_state {
36         START,
37         CLOCK_RECOVERY,
38         EQUALIZER_TRAINING,
39         FINISHED,
40         FAILED
41 };
42
43 enum voltage_swing_level {
44         VOLTAGE_LEVEL_0,
45         VOLTAGE_LEVEL_1,
46         VOLTAGE_LEVEL_2,
47         VOLTAGE_LEVEL_3,
48 };
49
50 enum pre_emphasis_level {
51         PRE_EMPHASIS_LEVEL_0,
52         PRE_EMPHASIS_LEVEL_1,
53         PRE_EMPHASIS_LEVEL_2,
54         PRE_EMPHASIS_LEVEL_3,
55 };
56
57 enum pattern_set {
58         PRBS7,
59         D10_2,
60         TRAINING_PTN1,
61         TRAINING_PTN2,
62         DP_NONE
63 };
64
65 enum color_space {
66         COLOR_RGB,
67         COLOR_YCBCR422,
68         COLOR_YCBCR444
69 };
70
71 enum color_depth {
72         COLOR_6,
73         COLOR_8,
74         COLOR_10,
75         COLOR_12
76 };
77
78 enum color_coefficient {
79         COLOR_YCBCR601,
80         COLOR_YCBCR709
81 };
82
83 enum dynamic_range {
84         VESA,
85         CEA
86 };
87
88 enum pll_status {
89         PLL_UNLOCKED,
90         PLL_LOCKED
91 };
92
93 enum clock_recovery_m_value_type {
94         CALCULATED_M,
95         REGISTER_M
96 };
97
98 enum video_timing_recognition_type {
99         VIDEO_TIMING_FROM_CAPTURE,
100         VIDEO_TIMING_FROM_REGISTER
101 };
102
103 enum analog_power_block {
104         AUX_BLOCK,
105         CH0_BLOCK,
106         CH1_BLOCK,
107         CH2_BLOCK,
108         CH3_BLOCK,
109         ANALOG_TOTAL,
110         POWER_ALL
111 };
112
113 enum dp_irq_type {
114         DP_IRQ_TYPE_HP_CABLE_IN,
115         DP_IRQ_TYPE_HP_CABLE_OUT,
116         DP_IRQ_TYPE_HP_CHANGE,
117         DP_IRQ_TYPE_UNKNOWN,
118 };
119
120 struct video_info {
121         char *name;
122
123         bool h_sync_polarity;
124         bool v_sync_polarity;
125         bool interlaced;
126
127         enum color_space color_space;
128         enum dynamic_range dynamic_range;
129         enum color_coefficient ycbcr_coeff;
130         enum color_depth color_depth;
131
132         enum link_rate_type link_rate;
133         enum link_lane_count_type lane_count;
134 };
135
136 struct link_train {
137         int eq_loop;
138         int cr_loop[4];
139
140         u8 link_rate;
141         u8 lane_count;
142         u8 training_lane[4];
143
144         enum link_training_state lt_state;
145 };
146
147 struct exynos_dp_device {
148         struct device           *dev;
149         struct drm_device       *drm_dev;
150         struct drm_connector    connector;
151         struct drm_encoder      *encoder;
152         struct drm_panel        *panel;
153         struct clk              *clock;
154         unsigned int            irq;
155         void __iomem            *reg_base;
156         void __iomem            *phy_addr;
157         unsigned int            enable_mask;
158
159         struct video_info       *video_info;
160         struct link_train       link_train;
161         struct work_struct      hotplug_work;
162         struct phy              *phy;
163         int                     dpms_mode;
164         int                     hpd_gpio;
165
166         struct exynos_drm_panel_info priv;
167 };
168
169 /* exynos_dp_reg.c */
170 void exynos_dp_enable_video_mute(struct exynos_dp_device *dp, bool enable);
171 void exynos_dp_stop_video(struct exynos_dp_device *dp);
172 void exynos_dp_lane_swap(struct exynos_dp_device *dp, bool enable);
173 void exynos_dp_init_analog_param(struct exynos_dp_device *dp);
174 void exynos_dp_init_interrupt(struct exynos_dp_device *dp);
175 void exynos_dp_reset(struct exynos_dp_device *dp);
176 void exynos_dp_swreset(struct exynos_dp_device *dp);
177 void exynos_dp_config_interrupt(struct exynos_dp_device *dp);
178 enum pll_status exynos_dp_get_pll_lock_status(struct exynos_dp_device *dp);
179 void exynos_dp_set_pll_power_down(struct exynos_dp_device *dp, bool enable);
180 void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp,
181                                 enum analog_power_block block,
182                                 bool enable);
183 void exynos_dp_init_analog_func(struct exynos_dp_device *dp);
184 void exynos_dp_init_hpd(struct exynos_dp_device *dp);
185 enum dp_irq_type exynos_dp_get_irq_type(struct exynos_dp_device *dp);
186 void exynos_dp_clear_hotplug_interrupts(struct exynos_dp_device *dp);
187 void exynos_dp_reset_aux(struct exynos_dp_device *dp);
188 void exynos_dp_init_aux(struct exynos_dp_device *dp);
189 int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp);
190 void exynos_dp_enable_sw_function(struct exynos_dp_device *dp);
191 int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp);
192 int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp,
193                                 unsigned int reg_addr,
194                                 unsigned char data);
195 int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp,
196                                 unsigned int reg_addr,
197                                 unsigned char *data);
198 int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp,
199                                 unsigned int reg_addr,
200                                 unsigned int count,
201                                 unsigned char data[]);
202 int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp,
203                                 unsigned int reg_addr,
204                                 unsigned int count,
205                                 unsigned char data[]);
206 int exynos_dp_select_i2c_device(struct exynos_dp_device *dp,
207                                 unsigned int device_addr,
208                                 unsigned int reg_addr);
209 int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp,
210                                 unsigned int device_addr,
211                                 unsigned int reg_addr,
212                                 unsigned int *data);
213 int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp,
214                                 unsigned int device_addr,
215                                 unsigned int reg_addr,
216                                 unsigned int count,
217                                 unsigned char edid[]);
218 void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype);
219 void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype);
220 void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count);
221 void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count);
222 void exynos_dp_enable_enhanced_mode(struct exynos_dp_device *dp, bool enable);
223 void exynos_dp_set_training_pattern(struct exynos_dp_device *dp,
224                                  enum pattern_set pattern);
225 void exynos_dp_set_lane0_pre_emphasis(struct exynos_dp_device *dp, u32 level);
226 void exynos_dp_set_lane1_pre_emphasis(struct exynos_dp_device *dp, u32 level);
227 void exynos_dp_set_lane2_pre_emphasis(struct exynos_dp_device *dp, u32 level);
228 void exynos_dp_set_lane3_pre_emphasis(struct exynos_dp_device *dp, u32 level);
229 void exynos_dp_set_lane0_link_training(struct exynos_dp_device *dp,
230                                 u32 training_lane);
231 void exynos_dp_set_lane1_link_training(struct exynos_dp_device *dp,
232                                 u32 training_lane);
233 void exynos_dp_set_lane2_link_training(struct exynos_dp_device *dp,
234                                 u32 training_lane);
235 void exynos_dp_set_lane3_link_training(struct exynos_dp_device *dp,
236                                 u32 training_lane);
237 u32 exynos_dp_get_lane0_link_training(struct exynos_dp_device *dp);
238 u32 exynos_dp_get_lane1_link_training(struct exynos_dp_device *dp);
239 u32 exynos_dp_get_lane2_link_training(struct exynos_dp_device *dp);
240 u32 exynos_dp_get_lane3_link_training(struct exynos_dp_device *dp);
241 void exynos_dp_reset_macro(struct exynos_dp_device *dp);
242 void exynos_dp_init_video(struct exynos_dp_device *dp);
243
244 void exynos_dp_set_video_color_format(struct exynos_dp_device *dp);
245 int exynos_dp_is_slave_video_stream_clock_on(struct exynos_dp_device *dp);
246 void exynos_dp_set_video_cr_mn(struct exynos_dp_device *dp,
247                         enum clock_recovery_m_value_type type,
248                         u32 m_value,
249                         u32 n_value);
250 void exynos_dp_set_video_timing_mode(struct exynos_dp_device *dp, u32 type);
251 void exynos_dp_enable_video_master(struct exynos_dp_device *dp, bool enable);
252 void exynos_dp_start_video(struct exynos_dp_device *dp);
253 int exynos_dp_is_video_stream_on(struct exynos_dp_device *dp);
254 void exynos_dp_config_video_slave_mode(struct exynos_dp_device *dp);
255 void exynos_dp_enable_scrambling(struct exynos_dp_device *dp);
256 void exynos_dp_disable_scrambling(struct exynos_dp_device *dp);
257
258 /* I2C EDID Chip ID, Slave Address */
259 #define I2C_EDID_DEVICE_ADDR                    0x50
260 #define I2C_E_EDID_DEVICE_ADDR                  0x30
261
262 #define EDID_BLOCK_LENGTH                       0x80
263 #define EDID_HEADER_PATTERN                     0x00
264 #define EDID_EXTENSION_FLAG                     0x7e
265 #define EDID_CHECKSUM                           0x7f
266
267 /* DP_MAX_LANE_COUNT */
268 #define DPCD_ENHANCED_FRAME_CAP(x)              (((x) >> 7) & 0x1)
269 #define DPCD_MAX_LANE_COUNT(x)                  ((x) & 0x1f)
270
271 /* DP_LANE_COUNT_SET */
272 #define DPCD_LANE_COUNT_SET(x)                  ((x) & 0x1f)
273
274 /* DP_TRAINING_LANE0_SET */
275 #define DPCD_PRE_EMPHASIS_SET(x)                (((x) & 0x3) << 3)
276 #define DPCD_PRE_EMPHASIS_GET(x)                (((x) >> 3) & 0x3)
277 #define DPCD_VOLTAGE_SWING_SET(x)               (((x) & 0x3) << 0)
278 #define DPCD_VOLTAGE_SWING_GET(x)               (((x) >> 0) & 0x3)
279
280 #endif /* _EXYNOS_DP_CORE_H */