1 /*
2 * Copyright © 2008 Keith Packard
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE.
21 */
22
23 #ifndef _DRM_DP_HELPER_H_
24 #define _DRM_DP_HELPER_H_
25
26 /*
27 * Unless otherwise noted, all values are from the DP 1.1a spec. Note that
28 * DP and DPCD versions are independent. Differences from 1.0 are not noted,
29 * 1.0 devices basically don't exist in the wild.
30 *
31 * Abbreviations, in chronological order:
32 *
33 * eDP: Embedded DisplayPort version 1
34 * DPI: DisplayPort Interoperability Guideline v1.1a
35 * 1.2: DisplayPort 1.2
36 *
37 * 1.2 formally includes both eDP and DPI definitions.
38 */
39
40 #define AUX_NATIVE_WRITE 0x8
41 #define AUX_NATIVE_READ 0x9
42 #define AUX_I2C_WRITE 0x0
43 #define AUX_I2C_READ 0x1
44 #define AUX_I2C_STATUS 0x2
45 #define AUX_I2C_MOT 0x4
46
47 #define AUX_NATIVE_REPLY_ACK (0x0 << 4)
48 #define AUX_NATIVE_REPLY_NACK (0x1 << 4)
49 #define AUX_NATIVE_REPLY_DEFER (0x2 << 4)
50 #define AUX_NATIVE_REPLY_MASK (0x3 << 4)
51
52 #define AUX_I2C_REPLY_ACK (0x0 << 6)
53 #define AUX_I2C_REPLY_NACK (0x1 << 6)
54 #define AUX_I2C_REPLY_DEFER (0x2 << 6)
55 #define AUX_I2C_REPLY_MASK (0x3 << 6)
56
57 /* AUX CH addresses */
58 /* DPCD */
59 #define DP_DPCD_REV 0x000
60
61 #define DP_MAX_LINK_RATE 0x001
62
63 #define DP_MAX_LANE_COUNT 0x002
64 # define DP_MAX_LANE_COUNT_MASK 0x1f
65 # define DP_TPS3_SUPPORTED (1 << 6) /* 1.2 */
66 # define DP_ENHANCED_FRAME_CAP (1 << 7)
67
68 #define DP_MAX_DOWNSPREAD 0x003
69 # define DP_NO_AUX_HANDSHAKE_LINK_TRAINING (1 << 6)
70
71 #define DP_NORP 0x004
72
73 #define DP_DOWNSTREAMPORT_PRESENT 0x005
74 # define DP_DWN_STRM_PORT_PRESENT (1 << 0)
75 # define DP_DWN_STRM_PORT_TYPE_MASK 0x06
76 /* 00b = DisplayPort */
77 /* 01b = Analog */
78 /* 10b = TMDS or HDMI */
79 /* 11b = Other */
80 # define DP_FORMAT_CONVERSION (1 << 3)
81 # define DP_DETAILED_CAP_INFO_AVAILABLE (1 << 4) /* DPI */
82
83 #define DP_MAIN_LINK_CHANNEL_CODING 0x006
84
85 #define DP_DOWN_STREAM_PORT_COUNT 0x007
86 # define DP_PORT_COUNT_MASK 0x0f
87 # define DP_MSA_TIMING_PAR_IGNORED (1 << 6) /* eDP */
88 # define DP_OUI_SUPPORT (1 << 7)
89
90 #define DP_I2C_SPEED_CAP 0x00c /* DPI */
91 # define DP_I2C_SPEED_1K 0x01
92 # define DP_I2C_SPEED_5K 0x02
93 # define DP_I2C_SPEED_10K 0x04
94 # define DP_I2C_SPEED_100K 0x08
95 # define DP_I2C_SPEED_400K 0x10
96 # define DP_I2C_SPEED_1M 0x20
97
98 #define DP_EDP_CONFIGURATION_CAP 0x00d /* XXX 1.2? */
99 #define DP_TRAINING_AUX_RD_INTERVAL 0x00e /* XXX 1.2? */
100
101 /* Multiple stream transport */
102 #define DP_MSTM_CAP 0x021 /* 1.2 */
103 # define DP_MST_CAP (1 << 0)
104
105 #define DP_PSR_SUPPORT 0x070 /* XXX 1.2? */
106 # define DP_PSR_IS_SUPPORTED 1
107 #define DP_PSR_CAPS 0x071 /* XXX 1.2? */
108 # define DP_PSR_NO_TRAIN_ON_EXIT 1
109 # define DP_PSR_SETUP_TIME_330 (0 << 1)
110 # define DP_PSR_SETUP_TIME_275 (1 << 1)
111 # define DP_PSR_SETUP_TIME_220 (2 << 1)
112 # define DP_PSR_SETUP_TIME_165 (3 << 1)
113 # define DP_PSR_SETUP_TIME_110 (4 << 1)
114 # define DP_PSR_SETUP_TIME_55 (5 << 1)
115 # define DP_PSR_SETUP_TIME_0 (6 << 1)
116 # define DP_PSR_SETUP_TIME_MASK (7 << 1)
117 # define DP_PSR_SETUP_TIME_SHIFT 1
118
119 /*
120 * 0x80-0x8f describe downstream port capabilities, but there are two layouts
121 * based on whether DP_DETAILED_CAP_INFO_AVAILABLE was set. If it was not,
122 * each port's descriptor is one byte wide. If it was set, each port's is
123 * four bytes wide, starting with the one byte from the base info. As of
124 * DP interop v1.1a only VGA defines additional detail.
125 */
126
127 /* offset 0 */
128 #define DP_DOWNSTREAM_PORT_0 0x80
129 # define DP_DS_PORT_TYPE_MASK (7 << 0)
130 # define DP_DS_PORT_TYPE_DP 0
131 # define DP_DS_PORT_TYPE_VGA 1
132 # define DP_DS_PORT_TYPE_DVI 2
133 # define DP_DS_PORT_TYPE_HDMI 3
134 # define DP_DS_PORT_TYPE_NON_EDID 4
135 # define DP_DS_PORT_HPD (1 << 3)
136 /* offset 1 for VGA is maximum megapixels per second / 8 */
137 /* offset 2 */
138 # define DP_DS_VGA_MAX_BPC_MASK (3 << 0)
139 # define DP_DS_VGA_8BPC 0
140 # define DP_DS_VGA_10BPC 1
141 # define DP_DS_VGA_12BPC 2
142 # define DP_DS_VGA_16BPC 3
143
144 /* link configuration */
145 #define DP_LINK_BW_SET 0x100
146 # define DP_LINK_BW_1_62 0x06
147 # define DP_LINK_BW_2_7 0x0a
148 # define DP_LINK_BW_5_4 0x14 /* 1.2 */
149
150 #define DP_LANE_COUNT_SET 0x101
151 # define DP_LANE_COUNT_MASK 0x0f
152 # define DP_LANE_COUNT_ENHANCED_FRAME_EN (1 << 7)
153
154 #define DP_TRAINING_PATTERN_SET 0x102
155 # define DP_TRAINING_PATTERN_DISABLE 0
156 # define DP_TRAINING_PATTERN_1 1
157 # define DP_TRAINING_PATTERN_2 2
158 # define DP_TRAINING_PATTERN_3 3 /* 1.2 */
159 # define DP_TRAINING_PATTERN_MASK 0x3
160
161 # define DP_LINK_QUAL_PATTERN_DISABLE (0 << 2)
162 # define DP_LINK_QUAL_PATTERN_D10_2 (1 << 2)
163 # define DP_LINK_QUAL_PATTERN_ERROR_RATE (2 << 2)
164 # define DP_LINK_QUAL_PATTERN_PRBS7 (3 << 2)
165 # define DP_LINK_QUAL_PATTERN_MASK (3 << 2)
166
167 # define DP_RECOVERED_CLOCK_OUT_EN (1 << 4)
168 # define DP_LINK_SCRAMBLING_DISABLE (1 << 5)
169
170 # define DP_SYMBOL_ERROR_COUNT_BOTH (0 << 6)
171 # define DP_SYMBOL_ERROR_COUNT_DISPARITY (1 << 6)
172 # define DP_SYMBOL_ERROR_COUNT_SYMBOL (2 << 6)
173 # define DP_SYMBOL_ERROR_COUNT_MASK (3 << 6)
174
175 #define DP_TRAINING_LANE0_SET 0x103
176 #define DP_TRAINING_LANE1_SET 0x104
177 #define DP_TRAINING_LANE2_SET 0x105
178 #define DP_TRAINING_LANE3_SET 0x106
179
180 # define DP_TRAIN_VOLTAGE_SWING_MASK 0x3
181 # define DP_TRAIN_VOLTAGE_SWING_SHIFT 0
182 # define DP_TRAIN_MAX_SWING_REACHED (1 << 2)
183 # define DP_TRAIN_VOLTAGE_SWING_400 (0 << 0)
184 # define DP_TRAIN_VOLTAGE_SWING_600 (1 << 0)
185 # define DP_TRAIN_VOLTAGE_SWING_800 (2 << 0)
186 # define DP_TRAIN_VOLTAGE_SWING_1200 (3 << 0)
187
188 # define DP_TRAIN_PRE_EMPHASIS_MASK (3 << 3)
189 # define DP_TRAIN_PRE_EMPHASIS_0 (0 << 3)
190 # define DP_TRAIN_PRE_EMPHASIS_3_5 (1 << 3)
191 # define DP_TRAIN_PRE_EMPHASIS_6 (2 << 3)
192 # define DP_TRAIN_PRE_EMPHASIS_9_5 (3 << 3)
193
194 # define DP_TRAIN_PRE_EMPHASIS_SHIFT 3
195 # define DP_TRAIN_MAX_PRE_EMPHASIS_REACHED (1 << 5)
196
197 #define DP_DOWNSPREAD_CTRL 0x107
198 # define DP_SPREAD_AMP_0_5 (1 << 4)
199 # define DP_MSA_TIMING_PAR_IGNORE_EN (1 << 7) /* eDP */
200
201 #define DP_MAIN_LINK_CHANNEL_CODING_SET 0x108
202 # define DP_SET_ANSI_8B10B (1 << 0)
203
204 #define DP_I2C_SPEED_CONTROL_STATUS 0x109 /* DPI */
205 /* bitmask as for DP_I2C_SPEED_CAP */
206
207 #define DP_EDP_CONFIGURATION_SET 0x10a /* XXX 1.2? */
208
209 #define DP_MSTM_CTRL 0x111 /* 1.2 */
210 # define DP_MST_EN (1 << 0)
211 # define DP_UP_REQ_EN (1 << 1)
212 # define DP_UPSTREAM_IS_SRC (1 << 2)
213
214 #define DP_PSR_EN_CFG 0x170 /* XXX 1.2? */
215 # define DP_PSR_ENABLE (1 << 0)
216 # define DP_PSR_MAIN_LINK_ACTIVE (1 << 1)
217 # define DP_PSR_CRC_VERIFICATION (1 << 2)
218 # define DP_PSR_FRAME_CAPTURE (1 << 3)
219
220 #define DP_SINK_COUNT 0x200
221 /* prior to 1.2 bit 7 was reserved mbz */
222 # define DP_GET_SINK_COUNT(x) ((((x) & 0x80) >> 1) | ((x) & 0x3f))
223 # define DP_SINK_CP_READY (1 << 6)
224
225 #define DP_DEVICE_SERVICE_IRQ_VECTOR 0x201
226 # define DP_REMOTE_CONTROL_COMMAND_PENDING (1 << 0)
227 # define DP_AUTOMATED_TEST_REQUEST (1 << 1)
228 # define DP_CP_IRQ (1 << 2)
229 # define DP_SINK_SPECIFIC_IRQ (1 << 6)
230
231 #define DP_LANE0_1_STATUS 0x202
232 #define DP_LANE2_3_STATUS 0x203
233 # define DP_LANE_CR_DONE (1 << 0)
234 # define DP_LANE_CHANNEL_EQ_DONE (1 << 1)
235 # define DP_LANE_SYMBOL_LOCKED (1 << 2)
236
237 #define DP_CHANNEL_EQ_BITS (DP_LANE_CR_DONE | \
238 DP_LANE_CHANNEL_EQ_DONE | \
239 DP_LANE_SYMBOL_LOCKED)
240
241 #define DP_LANE_ALIGN_STATUS_UPDATED 0x204
242
243 #define DP_INTERLANE_ALIGN_DONE (1 << 0)
244 #define DP_DOWNSTREAM_PORT_STATUS_CHANGED (1 << 6)
245 #define DP_LINK_STATUS_UPDATED (1 << 7)
246
247 #define DP_SINK_STATUS 0x205
248
249 #define DP_RECEIVE_PORT_0_STATUS (1 << 0)
250 #define DP_RECEIVE_PORT_1_STATUS (1 << 1)
251
252 #define DP_ADJUST_REQUEST_LANE0_1 0x206
253 #define DP_ADJUST_REQUEST_LANE2_3 0x207
254 # define DP_ADJUST_VOLTAGE_SWING_LANE0_MASK 0x03
255 # define DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT 0
256 # define DP_ADJUST_PRE_EMPHASIS_LANE0_MASK 0x0c
257 # define DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT 2
258 # define DP_ADJUST_VOLTAGE_SWING_LANE1_MASK 0x30
259 # define DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT 4
260 # define DP_ADJUST_PRE_EMPHASIS_LANE1_MASK 0xc0
261 # define DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT 6
262
263 #define DP_TEST_REQUEST 0x218
264 # define DP_TEST_LINK_TRAINING (1 << 0)
265 # define DP_TEST_LINK_PATTERN (1 << 1)
266 # define DP_TEST_LINK_EDID_READ (1 << 2)
267 # define DP_TEST_LINK_PHY_TEST_PATTERN (1 << 3) /* DPCD >= 1.1 */
268
269 #define DP_TEST_LINK_RATE 0x219
270 # define DP_LINK_RATE_162 (0x6)
271 # define DP_LINK_RATE_27 (0xa)
272
273 #define DP_TEST_LANE_COUNT 0x220
274
275 #define DP_TEST_PATTERN 0x221
276
277 #define DP_TEST_RESPONSE 0x260
278 # define DP_TEST_ACK (1 << 0)
279 # define DP_TEST_NAK (1 << 1)
280 # define DP_TEST_EDID_CHECKSUM_WRITE (1 << 2)
281
282 #define DP_SOURCE_OUI 0x300
283 #define DP_SINK_OUI 0x400
284 #define DP_BRANCH_OUI 0x500
285
286 #define DP_SET_POWER 0x600
287 # define DP_SET_POWER_D0 0x1
288 # define DP_SET_POWER_D3 0x2
289
290 #define DP_PSR_ERROR_STATUS 0x2006 /* XXX 1.2? */
291 # define DP_PSR_LINK_CRC_ERROR (1 << 0)
292 # define DP_PSR_RFB_STORAGE_ERROR (1 << 1)
293
294 #define DP_PSR_ESI 0x2007 /* XXX 1.2? */
295 # define DP_PSR_CAPS_CHANGE (1 << 0)
296
297 #define DP_PSR_STATUS 0x2008 /* XXX 1.2? */
298 # define DP_PSR_SINK_INACTIVE 0
299 # define DP_PSR_SINK_ACTIVE_SRC_SYNCED 1
300 # define DP_PSR_SINK_ACTIVE_RFB 2
301 # define DP_PSR_SINK_ACTIVE_SINK_SYNCED 3
302 # define DP_PSR_SINK_ACTIVE_RESYNC 4
303 # define DP_PSR_SINK_INTERNAL_ERROR 7
304 # define DP_PSR_SINK_STATE_MASK 0x07
305
306 #define MODE_I2C_START 1
307 #define MODE_I2C_WRITE 2
308 #define MODE_I2C_READ 4
309 #define MODE_I2C_STOP 8
310
311 struct iic_dp_aux_data {
312 bool running;
313 u16 address;
314 void *priv;
315 int (*aux_ch)(device_t adapter, int mode, uint8_t write_byte,
316 uint8_t *read_byte);
317 device_t port;
318 };
319
320 int iic_dp_aux_add_bus(device_t dev, const char *name,
321 int (*ch)(device_t idev, int mode, uint8_t write_byte, uint8_t *read_byte),
322 void *priv, device_t *bus, device_t *adapter);
323
324
325 #define DP_LINK_STATUS_SIZE 6
326 bool drm_dp_channel_eq_ok(u8 link_status[DP_LINK_STATUS_SIZE],
327 int lane_count);
328 bool drm_dp_clock_recovery_ok(u8 link_status[DP_LINK_STATUS_SIZE],
329 int lane_count);
330 u8 drm_dp_get_adjust_request_voltage(u8 link_status[DP_LINK_STATUS_SIZE],
331 int lane);
332 u8 drm_dp_get_adjust_request_pre_emphasis(u8 link_status[DP_LINK_STATUS_SIZE],
333 int lane);
334
335 #define DP_RECEIVER_CAP_SIZE 0xf
336 void drm_dp_link_train_clock_recovery_delay(u8 dpcd[DP_RECEIVER_CAP_SIZE]);
337 void drm_dp_link_train_channel_eq_delay(u8 dpcd[DP_RECEIVER_CAP_SIZE]);
338
339 u8 drm_dp_link_rate_to_bw_code(int link_rate);
340 int drm_dp_bw_code_to_link_rate(u8 link_bw);
341
342 static inline int
drm_dp_max_link_rate(u8 dpcd[DP_RECEIVER_CAP_SIZE])343 drm_dp_max_link_rate(u8 dpcd[DP_RECEIVER_CAP_SIZE])
344 {
345 return drm_dp_bw_code_to_link_rate(dpcd[DP_MAX_LINK_RATE]);
346 }
347
348 static inline u8
drm_dp_max_lane_count(u8 dpcd[DP_RECEIVER_CAP_SIZE])349 drm_dp_max_lane_count(u8 dpcd[DP_RECEIVER_CAP_SIZE])
350 {
351 return dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK;
352 }
353
354 #endif /* _DRM_DP_HELPER_H_ */
355