blob: 1d09050a8c001749ba26087581b93cb2de1f9153 [file] [log] [blame]
Keith Packarda4fc5ed2009-04-07 16:16:42 -07001/*
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
Dave Airlieab2c0672009-12-04 10:55:24 +100023#ifndef _DRM_DP_HELPER_H_
24#define _DRM_DP_HELPER_H_
Keith Packarda4fc5ed2009-04-07 16:16:42 -070025
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -070026#include <linux/types.h>
27#include <linux/i2c.h>
Daniel Vetter1a644cd2012-10-18 15:32:40 +020028#include <linux/delay.h>
Jesse Barnes9f0e7ff2010-10-07 16:01:14 -070029
Adam Jacksona477f4f2012-09-20 16:42:44 -040030/*
31 * Unless otherwise noted, all values are from the DP 1.1a spec. Note that
32 * DP and DPCD versions are independent. Differences from 1.0 are not noted,
33 * 1.0 devices basically don't exist in the wild.
34 *
35 * Abbreviations, in chronological order:
36 *
37 * eDP: Embedded DisplayPort version 1
38 * DPI: DisplayPort Interoperability Guideline v1.1a
39 * 1.2: DisplayPort 1.2
40 *
41 * 1.2 formally includes both eDP and DPI definitions.
42 */
Keith Packarda4fc5ed2009-04-07 16:16:42 -070043
Thierry Reding6b27f7f2013-12-16 17:01:29 +010044#define DP_AUX_I2C_WRITE 0x0
45#define DP_AUX_I2C_READ 0x1
46#define DP_AUX_I2C_STATUS 0x2
47#define DP_AUX_I2C_MOT 0x4
48#define DP_AUX_NATIVE_WRITE 0x8
49#define DP_AUX_NATIVE_READ 0x9
Keith Packarda4fc5ed2009-04-07 16:16:42 -070050
Thierry Reding6b27f7f2013-12-16 17:01:29 +010051#define DP_AUX_NATIVE_REPLY_ACK (0x0 << 0)
52#define DP_AUX_NATIVE_REPLY_NACK (0x1 << 0)
53#define DP_AUX_NATIVE_REPLY_DEFER (0x2 << 0)
54#define DP_AUX_NATIVE_REPLY_MASK (0x3 << 0)
Keith Packarda4fc5ed2009-04-07 16:16:42 -070055
Thierry Reding6b27f7f2013-12-16 17:01:29 +010056#define DP_AUX_I2C_REPLY_ACK (0x0 << 2)
57#define DP_AUX_I2C_REPLY_NACK (0x1 << 2)
58#define DP_AUX_I2C_REPLY_DEFER (0x2 << 2)
59#define DP_AUX_I2C_REPLY_MASK (0x3 << 2)
Keith Packarda4fc5ed2009-04-07 16:16:42 -070060
61/* AUX CH addresses */
Alex Deucher5801ead2009-11-24 13:32:59 -050062/* DPCD */
63#define DP_DPCD_REV 0x000
Dave Airlie746c1aa2009-12-08 07:07:28 +100064
Alex Deucher5801ead2009-11-24 13:32:59 -050065#define DP_MAX_LINK_RATE 0x001
66
67#define DP_MAX_LANE_COUNT 0x002
68# define DP_MAX_LANE_COUNT_MASK 0x1f
Adam Jacksona477f4f2012-09-20 16:42:44 -040069# define DP_TPS3_SUPPORTED (1 << 6) /* 1.2 */
Alex Deucher5801ead2009-11-24 13:32:59 -050070# define DP_ENHANCED_FRAME_CAP (1 << 7)
71
72#define DP_MAX_DOWNSPREAD 0x003
73# define DP_NO_AUX_HANDSHAKE_LINK_TRAINING (1 << 6)
74
75#define DP_NORP 0x004
76
77#define DP_DOWNSTREAMPORT_PRESENT 0x005
78# define DP_DWN_STRM_PORT_PRESENT (1 << 0)
79# define DP_DWN_STRM_PORT_TYPE_MASK 0x06
Jani Nikula3d2e4232013-09-27 14:48:41 +030080# define DP_DWN_STRM_PORT_TYPE_DP (0 << 1)
81# define DP_DWN_STRM_PORT_TYPE_ANALOG (1 << 1)
82# define DP_DWN_STRM_PORT_TYPE_TMDS (2 << 1)
83# define DP_DWN_STRM_PORT_TYPE_OTHER (3 << 1)
Alex Deucher5801ead2009-11-24 13:32:59 -050084# define DP_FORMAT_CONVERSION (1 << 3)
Adam Jacksona477f4f2012-09-20 16:42:44 -040085# define DP_DETAILED_CAP_INFO_AVAILABLE (1 << 4) /* DPI */
Alex Deucher5801ead2009-11-24 13:32:59 -050086
87#define DP_MAIN_LINK_CHANNEL_CODING 0x006
88
Adam Jacksonde44d972012-05-14 16:05:46 -040089#define DP_DOWN_STREAM_PORT_COUNT 0x007
Adam Jacksone89861d2012-09-18 10:58:48 -040090# define DP_PORT_COUNT_MASK 0x0f
Adam Jacksona477f4f2012-09-20 16:42:44 -040091# define DP_MSA_TIMING_PAR_IGNORED (1 << 6) /* eDP */
Adam Jacksone89861d2012-09-18 10:58:48 -040092# define DP_OUI_SUPPORT (1 << 7)
93
Adam Jacksona477f4f2012-09-20 16:42:44 -040094#define DP_I2C_SPEED_CAP 0x00c /* DPI */
Adam Jacksone89861d2012-09-18 10:58:48 -040095# define DP_I2C_SPEED_1K 0x01
96# define DP_I2C_SPEED_5K 0x02
97# define DP_I2C_SPEED_10K 0x04
98# define DP_I2C_SPEED_100K 0x08
99# define DP_I2C_SPEED_400K 0x10
100# define DP_I2C_SPEED_1M 0x20
Adam Jacksonde44d972012-05-14 16:05:46 -0400101
Adam Jacksona477f4f2012-09-20 16:42:44 -0400102#define DP_EDP_CONFIGURATION_CAP 0x00d /* XXX 1.2? */
103#define DP_TRAINING_AUX_RD_INTERVAL 0x00e /* XXX 1.2? */
Alex Deucher428c4b52011-05-20 04:34:25 -0400104
Adam Jacksone89861d2012-09-18 10:58:48 -0400105/* Multiple stream transport */
Adam Jacksona477f4f2012-09-20 16:42:44 -0400106#define DP_MSTM_CAP 0x021 /* 1.2 */
Adam Jacksone89861d2012-09-18 10:58:48 -0400107# define DP_MST_CAP (1 << 0)
108
Adam Jacksona477f4f2012-09-20 16:42:44 -0400109#define DP_PSR_SUPPORT 0x070 /* XXX 1.2? */
Ben Widawskyb73fe582011-10-04 15:16:48 -0700110# define DP_PSR_IS_SUPPORTED 1
Adam Jacksona477f4f2012-09-20 16:42:44 -0400111#define DP_PSR_CAPS 0x071 /* XXX 1.2? */
Ben Widawskyb73fe582011-10-04 15:16:48 -0700112# define DP_PSR_NO_TRAIN_ON_EXIT 1
113# define DP_PSR_SETUP_TIME_330 (0 << 1)
114# define DP_PSR_SETUP_TIME_275 (1 << 1)
115# define DP_PSR_SETUP_TIME_220 (2 << 1)
116# define DP_PSR_SETUP_TIME_165 (3 << 1)
117# define DP_PSR_SETUP_TIME_110 (4 << 1)
118# define DP_PSR_SETUP_TIME_55 (5 << 1)
119# define DP_PSR_SETUP_TIME_0 (6 << 1)
120# define DP_PSR_SETUP_TIME_MASK (7 << 1)
121# define DP_PSR_SETUP_TIME_SHIFT 1
122
Adam Jacksone89861d2012-09-18 10:58:48 -0400123/*
124 * 0x80-0x8f describe downstream port capabilities, but there are two layouts
125 * based on whether DP_DETAILED_CAP_INFO_AVAILABLE was set. If it was not,
126 * each port's descriptor is one byte wide. If it was set, each port's is
127 * four bytes wide, starting with the one byte from the base info. As of
128 * DP interop v1.1a only VGA defines additional detail.
129 */
130
131/* offset 0 */
132#define DP_DOWNSTREAM_PORT_0 0x80
133# define DP_DS_PORT_TYPE_MASK (7 << 0)
134# define DP_DS_PORT_TYPE_DP 0
135# define DP_DS_PORT_TYPE_VGA 1
136# define DP_DS_PORT_TYPE_DVI 2
137# define DP_DS_PORT_TYPE_HDMI 3
138# define DP_DS_PORT_TYPE_NON_EDID 4
139# define DP_DS_PORT_HPD (1 << 3)
140/* offset 1 for VGA is maximum megapixels per second / 8 */
141/* offset 2 */
142# define DP_DS_VGA_MAX_BPC_MASK (3 << 0)
143# define DP_DS_VGA_8BPC 0
144# define DP_DS_VGA_10BPC 1
145# define DP_DS_VGA_12BPC 2
146# define DP_DS_VGA_16BPC 3
147
Alex Deucher5801ead2009-11-24 13:32:59 -0500148/* link configuration */
149#define DP_LINK_BW_SET 0x100
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700150# define DP_LINK_BW_1_62 0x06
151# define DP_LINK_BW_2_7 0x0a
Adam Jacksona477f4f2012-09-20 16:42:44 -0400152# define DP_LINK_BW_5_4 0x14 /* 1.2 */
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700153
Alex Deucher5801ead2009-11-24 13:32:59 -0500154#define DP_LANE_COUNT_SET 0x101
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700155# define DP_LANE_COUNT_MASK 0x0f
156# define DP_LANE_COUNT_ENHANCED_FRAME_EN (1 << 7)
157
Alex Deucher5801ead2009-11-24 13:32:59 -0500158#define DP_TRAINING_PATTERN_SET 0x102
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700159# define DP_TRAINING_PATTERN_DISABLE 0
160# define DP_TRAINING_PATTERN_1 1
161# define DP_TRAINING_PATTERN_2 2
Adam Jacksona477f4f2012-09-20 16:42:44 -0400162# define DP_TRAINING_PATTERN_3 3 /* 1.2 */
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700163# define DP_TRAINING_PATTERN_MASK 0x3
164
165# define DP_LINK_QUAL_PATTERN_DISABLE (0 << 2)
166# define DP_LINK_QUAL_PATTERN_D10_2 (1 << 2)
167# define DP_LINK_QUAL_PATTERN_ERROR_RATE (2 << 2)
168# define DP_LINK_QUAL_PATTERN_PRBS7 (3 << 2)
169# define DP_LINK_QUAL_PATTERN_MASK (3 << 2)
170
171# define DP_RECOVERED_CLOCK_OUT_EN (1 << 4)
172# define DP_LINK_SCRAMBLING_DISABLE (1 << 5)
173
174# define DP_SYMBOL_ERROR_COUNT_BOTH (0 << 6)
175# define DP_SYMBOL_ERROR_COUNT_DISPARITY (1 << 6)
176# define DP_SYMBOL_ERROR_COUNT_SYMBOL (2 << 6)
177# define DP_SYMBOL_ERROR_COUNT_MASK (3 << 6)
178
179#define DP_TRAINING_LANE0_SET 0x103
180#define DP_TRAINING_LANE1_SET 0x104
181#define DP_TRAINING_LANE2_SET 0x105
182#define DP_TRAINING_LANE3_SET 0x106
183
184# define DP_TRAIN_VOLTAGE_SWING_MASK 0x3
185# define DP_TRAIN_VOLTAGE_SWING_SHIFT 0
186# define DP_TRAIN_MAX_SWING_REACHED (1 << 2)
187# define DP_TRAIN_VOLTAGE_SWING_400 (0 << 0)
188# define DP_TRAIN_VOLTAGE_SWING_600 (1 << 0)
189# define DP_TRAIN_VOLTAGE_SWING_800 (2 << 0)
190# define DP_TRAIN_VOLTAGE_SWING_1200 (3 << 0)
191
192# define DP_TRAIN_PRE_EMPHASIS_MASK (3 << 3)
193# define DP_TRAIN_PRE_EMPHASIS_0 (0 << 3)
194# define DP_TRAIN_PRE_EMPHASIS_3_5 (1 << 3)
195# define DP_TRAIN_PRE_EMPHASIS_6 (2 << 3)
196# define DP_TRAIN_PRE_EMPHASIS_9_5 (3 << 3)
197
198# define DP_TRAIN_PRE_EMPHASIS_SHIFT 3
199# define DP_TRAIN_MAX_PRE_EMPHASIS_REACHED (1 << 5)
200
201#define DP_DOWNSPREAD_CTRL 0x107
202# define DP_SPREAD_AMP_0_5 (1 << 4)
Adam Jacksona477f4f2012-09-20 16:42:44 -0400203# define DP_MSA_TIMING_PAR_IGNORE_EN (1 << 7) /* eDP */
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700204
205#define DP_MAIN_LINK_CHANNEL_CODING_SET 0x108
206# define DP_SET_ANSI_8B10B (1 << 0)
207
Adam Jacksona477f4f2012-09-20 16:42:44 -0400208#define DP_I2C_SPEED_CONTROL_STATUS 0x109 /* DPI */
Adam Jacksone89861d2012-09-18 10:58:48 -0400209/* bitmask as for DP_I2C_SPEED_CAP */
210
Adam Jacksona477f4f2012-09-20 16:42:44 -0400211#define DP_EDP_CONFIGURATION_SET 0x10a /* XXX 1.2? */
Adam Jacksone89861d2012-09-18 10:58:48 -0400212
Adam Jacksona477f4f2012-09-20 16:42:44 -0400213#define DP_MSTM_CTRL 0x111 /* 1.2 */
Adam Jacksone89861d2012-09-18 10:58:48 -0400214# define DP_MST_EN (1 << 0)
215# define DP_UP_REQ_EN (1 << 1)
216# define DP_UPSTREAM_IS_SRC (1 << 2)
217
Adam Jacksona477f4f2012-09-20 16:42:44 -0400218#define DP_PSR_EN_CFG 0x170 /* XXX 1.2? */
Ben Widawskyb73fe582011-10-04 15:16:48 -0700219# define DP_PSR_ENABLE (1 << 0)
220# define DP_PSR_MAIN_LINK_ACTIVE (1 << 1)
221# define DP_PSR_CRC_VERIFICATION (1 << 2)
222# define DP_PSR_FRAME_CAPTURE (1 << 3)
223
Adam Jacksone89861d2012-09-18 10:58:48 -0400224#define DP_SINK_COUNT 0x200
Adam Jacksonda131a42012-09-20 16:42:45 -0400225/* prior to 1.2 bit 7 was reserved mbz */
226# define DP_GET_SINK_COUNT(x) ((((x) & 0x80) >> 1) | ((x) & 0x3f))
Adam Jacksone89861d2012-09-18 10:58:48 -0400227# define DP_SINK_CP_READY (1 << 6)
228
Jesse Barnesa60f0e32011-10-20 15:09:17 -0700229#define DP_DEVICE_SERVICE_IRQ_VECTOR 0x201
230# define DP_REMOTE_CONTROL_COMMAND_PENDING (1 << 0)
231# define DP_AUTOMATED_TEST_REQUEST (1 << 1)
232# define DP_CP_IRQ (1 << 2)
233# define DP_SINK_SPECIFIC_IRQ (1 << 6)
234
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700235#define DP_LANE0_1_STATUS 0x202
236#define DP_LANE2_3_STATUS 0x203
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700237# define DP_LANE_CR_DONE (1 << 0)
238# define DP_LANE_CHANNEL_EQ_DONE (1 << 1)
239# define DP_LANE_SYMBOL_LOCKED (1 << 2)
240
Alex Deucher5801ead2009-11-24 13:32:59 -0500241#define DP_CHANNEL_EQ_BITS (DP_LANE_CR_DONE | \
242 DP_LANE_CHANNEL_EQ_DONE | \
243 DP_LANE_SYMBOL_LOCKED)
244
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700245#define DP_LANE_ALIGN_STATUS_UPDATED 0x204
246
247#define DP_INTERLANE_ALIGN_DONE (1 << 0)
248#define DP_DOWNSTREAM_PORT_STATUS_CHANGED (1 << 6)
249#define DP_LINK_STATUS_UPDATED (1 << 7)
250
251#define DP_SINK_STATUS 0x205
252
253#define DP_RECEIVE_PORT_0_STATUS (1 << 0)
254#define DP_RECEIVE_PORT_1_STATUS (1 << 1)
255
256#define DP_ADJUST_REQUEST_LANE0_1 0x206
257#define DP_ADJUST_REQUEST_LANE2_3 0x207
Alex Deucher5801ead2009-11-24 13:32:59 -0500258# define DP_ADJUST_VOLTAGE_SWING_LANE0_MASK 0x03
259# define DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT 0
260# define DP_ADJUST_PRE_EMPHASIS_LANE0_MASK 0x0c
261# define DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT 2
262# define DP_ADJUST_VOLTAGE_SWING_LANE1_MASK 0x30
263# define DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT 4
264# define DP_ADJUST_PRE_EMPHASIS_LANE1_MASK 0xc0
265# define DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT 6
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700266
Jesse Barnesa60f0e32011-10-20 15:09:17 -0700267#define DP_TEST_REQUEST 0x218
268# define DP_TEST_LINK_TRAINING (1 << 0)
Todd Previtefe3c7032013-10-04 12:59:03 -0700269# define DP_TEST_LINK_VIDEO_PATTERN (1 << 1)
Jesse Barnesa60f0e32011-10-20 15:09:17 -0700270# define DP_TEST_LINK_EDID_READ (1 << 2)
271# define DP_TEST_LINK_PHY_TEST_PATTERN (1 << 3) /* DPCD >= 1.1 */
Todd Previtefe3c7032013-10-04 12:59:03 -0700272# define DP_TEST_LINK_FAUX_PATTERN (1 << 4) /* DPCD >= 1.2 */
Jesse Barnesa60f0e32011-10-20 15:09:17 -0700273
274#define DP_TEST_LINK_RATE 0x219
275# define DP_LINK_RATE_162 (0x6)
276# define DP_LINK_RATE_27 (0xa)
277
278#define DP_TEST_LANE_COUNT 0x220
279
280#define DP_TEST_PATTERN 0x221
281
282#define DP_TEST_RESPONSE 0x260
283# define DP_TEST_ACK (1 << 0)
284# define DP_TEST_NAK (1 << 1)
285# define DP_TEST_EDID_CHECKSUM_WRITE (1 << 2)
286
Adam Jackson86c3c3b2012-05-14 16:05:45 -0400287#define DP_SOURCE_OUI 0x300
288#define DP_SINK_OUI 0x400
289#define DP_BRANCH_OUI 0x500
290
Alex Deucher1a66c952009-11-20 19:40:13 -0500291#define DP_SET_POWER 0x600
Alex Deucher5801ead2009-11-24 13:32:59 -0500292# define DP_SET_POWER_D0 0x1
293# define DP_SET_POWER_D3 0x2
Alex Deucher1a66c952009-11-20 19:40:13 -0500294
Adam Jacksona477f4f2012-09-20 16:42:44 -0400295#define DP_PSR_ERROR_STATUS 0x2006 /* XXX 1.2? */
Ben Widawskyb73fe582011-10-04 15:16:48 -0700296# define DP_PSR_LINK_CRC_ERROR (1 << 0)
297# define DP_PSR_RFB_STORAGE_ERROR (1 << 1)
298
Adam Jacksona477f4f2012-09-20 16:42:44 -0400299#define DP_PSR_ESI 0x2007 /* XXX 1.2? */
Ben Widawskyb73fe582011-10-04 15:16:48 -0700300# define DP_PSR_CAPS_CHANGE (1 << 0)
301
Adam Jacksona477f4f2012-09-20 16:42:44 -0400302#define DP_PSR_STATUS 0x2008 /* XXX 1.2? */
Ben Widawskyb73fe582011-10-04 15:16:48 -0700303# define DP_PSR_SINK_INACTIVE 0
304# define DP_PSR_SINK_ACTIVE_SRC_SYNCED 1
305# define DP_PSR_SINK_ACTIVE_RFB 2
306# define DP_PSR_SINK_ACTIVE_SINK_SYNCED 3
307# define DP_PSR_SINK_ACTIVE_RESYNC 4
308# define DP_PSR_SINK_INTERNAL_ERROR 7
309# define DP_PSR_SINK_STATE_MASK 0x07
310
Dave Airlieab2c0672009-12-04 10:55:24 +1000311#define MODE_I2C_START 1
312#define MODE_I2C_WRITE 2
313#define MODE_I2C_READ 4
314#define MODE_I2C_STOP 8
315
Daniel Vetter28164fd2012-11-01 14:45:18 +0100316/**
317 * struct i2c_algo_dp_aux_data - driver interface structure for i2c over dp
318 * aux algorithm
319 * @running: set by the algo indicating whether an i2c is ongoing or whether
320 * the i2c bus is quiescent
321 * @address: i2c target address for the currently ongoing transfer
322 * @aux_ch: driver callback to transfer a single byte of the i2c payload
323 */
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700324struct i2c_algo_dp_aux_data {
325 bool running;
326 u16 address;
327 int (*aux_ch) (struct i2c_adapter *adapter,
Dave Airlieab2c0672009-12-04 10:55:24 +1000328 int mode, uint8_t write_byte,
329 uint8_t *read_byte);
Keith Packarda4fc5ed2009-04-07 16:16:42 -0700330};
331
332int
333i2c_dp_aux_add_bus(struct i2c_adapter *adapter);
334
Daniel Vetter1ffdff12012-10-18 10:15:24 +0200335
336#define DP_LINK_STATUS_SIZE 6
Jani Nikula0aec2882013-09-27 19:01:01 +0300337bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE],
Daniel Vetter1ffdff12012-10-18 10:15:24 +0200338 int lane_count);
Jani Nikula0aec2882013-09-27 19:01:01 +0300339bool drm_dp_clock_recovery_ok(const u8 link_status[DP_LINK_STATUS_SIZE],
Daniel Vetter01916272012-10-18 10:15:25 +0200340 int lane_count);
Jani Nikula0aec2882013-09-27 19:01:01 +0300341u8 drm_dp_get_adjust_request_voltage(const u8 link_status[DP_LINK_STATUS_SIZE],
Daniel Vetter0f037bd2012-10-18 10:15:27 +0200342 int lane);
Jani Nikula0aec2882013-09-27 19:01:01 +0300343u8 drm_dp_get_adjust_request_pre_emphasis(const u8 link_status[DP_LINK_STATUS_SIZE],
Daniel Vetter0f037bd2012-10-18 10:15:27 +0200344 int lane);
Daniel Vetter1ffdff12012-10-18 10:15:24 +0200345
Shobhit Kumar52604b12013-07-11 18:44:55 -0300346#define DP_RECEIVER_CAP_SIZE 0xf
347#define EDP_PSR_RECEIVER_CAP_SIZE 2
348
Jani Nikula0aec2882013-09-27 19:01:01 +0300349void drm_dp_link_train_clock_recovery_delay(const u8 dpcd[DP_RECEIVER_CAP_SIZE]);
350void drm_dp_link_train_channel_eq_delay(const u8 dpcd[DP_RECEIVER_CAP_SIZE]);
Daniel Vetter1a644cd2012-10-18 15:32:40 +0200351
Daniel Vetter3b5c6622012-10-18 10:15:31 +0200352u8 drm_dp_link_rate_to_bw_code(int link_rate);
353int drm_dp_bw_code_to_link_rate(u8 link_bw);
354
Shobhit Kumar52604b12013-07-11 18:44:55 -0300355struct edp_sdp_header {
356 u8 HB0; /* Secondary Data Packet ID */
357 u8 HB1; /* Secondary Data Packet Type */
358 u8 HB2; /* 7:5 reserved, 4:0 revision number */
359 u8 HB3; /* 7:5 reserved, 4:0 number of valid data bytes */
360} __packed;
361
362#define EDP_SDP_HEADER_REVISION_MASK 0x1F
363#define EDP_SDP_HEADER_VALID_PAYLOAD_BYTES 0x1F
364
365struct edp_vsc_psr {
366 struct edp_sdp_header sdp_header;
367 u8 DB0; /* Stereo Interface */
368 u8 DB1; /* 0 - PSR State; 1 - Update RFB; 2 - CRC Valid */
369 u8 DB2; /* CRC value bits 7:0 of the R or Cr component */
370 u8 DB3; /* CRC value bits 15:8 of the R or Cr component */
371 u8 DB4; /* CRC value bits 7:0 of the G or Y component */
372 u8 DB5; /* CRC value bits 15:8 of the G or Y component */
373 u8 DB6; /* CRC value bits 7:0 of the B or Cb component */
374 u8 DB7; /* CRC value bits 15:8 of the B or Cb component */
375 u8 DB8_31[24]; /* Reserved */
376} __packed;
377
378#define EDP_VSC_PSR_STATE_ACTIVE (1<<0)
379#define EDP_VSC_PSR_UPDATE_RFB (1<<1)
380#define EDP_VSC_PSR_CRC_VALUES_VALID (1<<2)
381
Daniel Vetter3b5c6622012-10-18 10:15:31 +0200382static inline int
Jani Nikula0aec2882013-09-27 19:01:01 +0300383drm_dp_max_link_rate(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
Daniel Vetter3b5c6622012-10-18 10:15:31 +0200384{
385 return drm_dp_bw_code_to_link_rate(dpcd[DP_MAX_LINK_RATE]);
386}
Daniel Vetter397fe152012-10-22 22:56:43 +0200387
388static inline u8
Jani Nikula0aec2882013-09-27 19:01:01 +0300389drm_dp_max_lane_count(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
Daniel Vetter397fe152012-10-22 22:56:43 +0200390{
391 return dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK;
392}
393
Jani Nikula58704e62013-10-04 15:08:08 +0300394static inline bool
395drm_dp_enhanced_frame_cap(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
396{
397 return dpcd[DP_DPCD_REV] >= 0x11 &&
398 (dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP);
399}
400
Dave Airlieab2c0672009-12-04 10:55:24 +1000401#endif /* _DRM_DP_HELPER_H_ */