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linux/include/drm/drm_dp_helper.h
Manasi Navare 4d4101c8b3 drm/dsc: Modify DRM helper to return complete DSC color depth capabilities 
DSC DPCD color depth register advertises its color depth capabilities
by setting each of the bits that corresponding to a specific color
depth. This patch defines those specific color depths and adds
a helper to return an array of color depth capabilities.

v2:
* Simplify the logic (Ville)

Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Acked-by: Sean Paul <seanpaul@chromium.org> (For merging through
drm-intel)
Reviewed-by: Ville Syrjala <ville.syrjala@linux.intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181127214125.17658-1-manasi.d.navare@intel.com
2018-11-27 15:30:34 -08:00

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/*
* Copyright © 2008 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef _DRM_DP_HELPER_H_
#define _DRM_DP_HELPER_H_
#include <linux/types.h>
#include <linux/i2c.h>
#include <linux/delay.h>
/*
* Unless otherwise noted, all values are from the DP 1.1a spec. Note that
* DP and DPCD versions are independent. Differences from 1.0 are not noted,
* 1.0 devices basically don't exist in the wild.
*
* Abbreviations, in chronological order:
*
* eDP: Embedded DisplayPort version 1
* DPI: DisplayPort Interoperability Guideline v1.1a
* 1.2: DisplayPort 1.2
* MST: Multistream Transport - part of DP 1.2a
*
* 1.2 formally includes both eDP and DPI definitions.
*/
#define DP_AUX_MAX_PAYLOAD_BYTES 16
#define DP_AUX_I2C_WRITE 0x0
#define DP_AUX_I2C_READ 0x1
#define DP_AUX_I2C_WRITE_STATUS_UPDATE 0x2
#define DP_AUX_I2C_MOT 0x4
#define DP_AUX_NATIVE_WRITE 0x8
#define DP_AUX_NATIVE_READ 0x9
#define DP_AUX_NATIVE_REPLY_ACK (0x0 << 0)
#define DP_AUX_NATIVE_REPLY_NACK (0x1 << 0)
#define DP_AUX_NATIVE_REPLY_DEFER (0x2 << 0)
#define DP_AUX_NATIVE_REPLY_MASK (0x3 << 0)
#define DP_AUX_I2C_REPLY_ACK (0x0 << 2)
#define DP_AUX_I2C_REPLY_NACK (0x1 << 2)
#define DP_AUX_I2C_REPLY_DEFER (0x2 << 2)
#define DP_AUX_I2C_REPLY_MASK (0x3 << 2)
/* AUX CH addresses */
/* DPCD */
#define DP_DPCD_REV 0x000
# define DP_DPCD_REV_10 0x10
# define DP_DPCD_REV_11 0x11
# define DP_DPCD_REV_12 0x12
# define DP_DPCD_REV_13 0x13
# define DP_DPCD_REV_14 0x14
#define DP_MAX_LINK_RATE 0x001
#define DP_MAX_LANE_COUNT 0x002
# define DP_MAX_LANE_COUNT_MASK 0x1f
# define DP_TPS3_SUPPORTED (1 << 6) /* 1.2 */
# define DP_ENHANCED_FRAME_CAP (1 << 7)
#define DP_MAX_DOWNSPREAD 0x003
# define DP_MAX_DOWNSPREAD_0_5 (1 << 0)
# define DP_NO_AUX_HANDSHAKE_LINK_TRAINING (1 << 6)
# define DP_TPS4_SUPPORTED (1 << 7)
#define DP_NORP 0x004
#define DP_DOWNSTREAMPORT_PRESENT 0x005
# define DP_DWN_STRM_PORT_PRESENT (1 << 0)
# define DP_DWN_STRM_PORT_TYPE_MASK 0x06
# define DP_DWN_STRM_PORT_TYPE_DP (0 << 1)
# define DP_DWN_STRM_PORT_TYPE_ANALOG (1 << 1)
# define DP_DWN_STRM_PORT_TYPE_TMDS (2 << 1)
# define DP_DWN_STRM_PORT_TYPE_OTHER (3 << 1)
# define DP_FORMAT_CONVERSION (1 << 3)
# define DP_DETAILED_CAP_INFO_AVAILABLE (1 << 4) /* DPI */
#define DP_MAIN_LINK_CHANNEL_CODING 0x006
#define DP_DOWN_STREAM_PORT_COUNT 0x007
# define DP_PORT_COUNT_MASK 0x0f
# define DP_MSA_TIMING_PAR_IGNORED (1 << 6) /* eDP */
# define DP_OUI_SUPPORT (1 << 7)
#define DP_RECEIVE_PORT_0_CAP_0 0x008
# define DP_LOCAL_EDID_PRESENT (1 << 1)
# define DP_ASSOCIATED_TO_PRECEDING_PORT (1 << 2)
#define DP_RECEIVE_PORT_0_BUFFER_SIZE 0x009
#define DP_RECEIVE_PORT_1_CAP_0 0x00a
#define DP_RECEIVE_PORT_1_BUFFER_SIZE 0x00b
#define DP_I2C_SPEED_CAP 0x00c /* DPI */
# define DP_I2C_SPEED_1K 0x01
# define DP_I2C_SPEED_5K 0x02
# define DP_I2C_SPEED_10K 0x04
# define DP_I2C_SPEED_100K 0x08
# define DP_I2C_SPEED_400K 0x10
# define DP_I2C_SPEED_1M 0x20
#define DP_EDP_CONFIGURATION_CAP 0x00d /* XXX 1.2? */
# define DP_ALTERNATE_SCRAMBLER_RESET_CAP (1 << 0)
# define DP_FRAMING_CHANGE_CAP (1 << 1)
# define DP_DPCD_DISPLAY_CONTROL_CAPABLE (1 << 3) /* edp v1.2 or higher */
#define DP_TRAINING_AUX_RD_INTERVAL 0x00e /* XXX 1.2? */
# define DP_TRAINING_AUX_RD_MASK 0x7F /* DP 1.3 */
# define DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT (1 << 7) /* DP 1.3 */
#define DP_ADAPTER_CAP 0x00f /* 1.2 */
# define DP_FORCE_LOAD_SENSE_CAP (1 << 0)
# define DP_ALTERNATE_I2C_PATTERN_CAP (1 << 1)
#define DP_SUPPORTED_LINK_RATES 0x010 /* eDP 1.4 */
# define DP_MAX_SUPPORTED_RATES 8 /* 16-bit little-endian */
/* Multiple stream transport */
#define DP_FAUX_CAP 0x020 /* 1.2 */
# define DP_FAUX_CAP_1 (1 << 0)
#define DP_MSTM_CAP 0x021 /* 1.2 */
# define DP_MST_CAP (1 << 0)
#define DP_NUMBER_OF_AUDIO_ENDPOINTS 0x022 /* 1.2 */
/* AV_SYNC_DATA_BLOCK 1.2 */
#define DP_AV_GRANULARITY 0x023
# define DP_AG_FACTOR_MASK (0xf << 0)
# define DP_AG_FACTOR_3MS (0 << 0)
# define DP_AG_FACTOR_2MS (1 << 0)
# define DP_AG_FACTOR_1MS (2 << 0)
# define DP_AG_FACTOR_500US (3 << 0)
# define DP_AG_FACTOR_200US (4 << 0)
# define DP_AG_FACTOR_100US (5 << 0)
# define DP_AG_FACTOR_10US (6 << 0)
# define DP_AG_FACTOR_1US (7 << 0)
# define DP_VG_FACTOR_MASK (0xf << 4)
# define DP_VG_FACTOR_3MS (0 << 4)
# define DP_VG_FACTOR_2MS (1 << 4)
# define DP_VG_FACTOR_1MS (2 << 4)
# define DP_VG_FACTOR_500US (3 << 4)
# define DP_VG_FACTOR_200US (4 << 4)
# define DP_VG_FACTOR_100US (5 << 4)
#define DP_AUD_DEC_LAT0 0x024
#define DP_AUD_DEC_LAT1 0x025
#define DP_AUD_PP_LAT0 0x026
#define DP_AUD_PP_LAT1 0x027
#define DP_VID_INTER_LAT 0x028
#define DP_VID_PROG_LAT 0x029
#define DP_REP_LAT 0x02a
#define DP_AUD_DEL_INS0 0x02b
#define DP_AUD_DEL_INS1 0x02c
#define DP_AUD_DEL_INS2 0x02d
/* End of AV_SYNC_DATA_BLOCK */
#define DP_RECEIVER_ALPM_CAP 0x02e /* eDP 1.4 */
# define DP_ALPM_CAP (1 << 0)
#define DP_SINK_DEVICE_AUX_FRAME_SYNC_CAP 0x02f /* eDP 1.4 */
# define DP_AUX_FRAME_SYNC_CAP (1 << 0)
#define DP_GUID 0x030 /* 1.2 */
#define DP_DSC_SUPPORT 0x060 /* DP 1.4 */
# define DP_DSC_DECOMPRESSION_IS_SUPPORTED (1 << 0)
#define DP_DSC_REV 0x061
# define DP_DSC_MAJOR_MASK (0xf << 0)
# define DP_DSC_MINOR_MASK (0xf << 4)
# define DP_DSC_MAJOR_SHIFT 0
# define DP_DSC_MINOR_SHIFT 4
#define DP_DSC_RC_BUF_BLK_SIZE 0x062
# define DP_DSC_RC_BUF_BLK_SIZE_1 0x0
# define DP_DSC_RC_BUF_BLK_SIZE_4 0x1
# define DP_DSC_RC_BUF_BLK_SIZE_16 0x2
# define DP_DSC_RC_BUF_BLK_SIZE_64 0x3
#define DP_DSC_RC_BUF_SIZE 0x063
#define DP_DSC_SLICE_CAP_1 0x064
# define DP_DSC_1_PER_DP_DSC_SINK (1 << 0)
# define DP_DSC_2_PER_DP_DSC_SINK (1 << 1)
# define DP_DSC_4_PER_DP_DSC_SINK (1 << 3)
# define DP_DSC_6_PER_DP_DSC_SINK (1 << 4)
# define DP_DSC_8_PER_DP_DSC_SINK (1 << 5)
# define DP_DSC_10_PER_DP_DSC_SINK (1 << 6)
# define DP_DSC_12_PER_DP_DSC_SINK (1 << 7)
#define DP_DSC_LINE_BUF_BIT_DEPTH 0x065
# define DP_DSC_LINE_BUF_BIT_DEPTH_MASK (0xf << 0)
# define DP_DSC_LINE_BUF_BIT_DEPTH_9 0x0
# define DP_DSC_LINE_BUF_BIT_DEPTH_10 0x1
# define DP_DSC_LINE_BUF_BIT_DEPTH_11 0x2
# define DP_DSC_LINE_BUF_BIT_DEPTH_12 0x3
# define DP_DSC_LINE_BUF_BIT_DEPTH_13 0x4
# define DP_DSC_LINE_BUF_BIT_DEPTH_14 0x5
# define DP_DSC_LINE_BUF_BIT_DEPTH_15 0x6
# define DP_DSC_LINE_BUF_BIT_DEPTH_16 0x7
# define DP_DSC_LINE_BUF_BIT_DEPTH_8 0x8
#define DP_DSC_BLK_PREDICTION_SUPPORT 0x066
# define DP_DSC_BLK_PREDICTION_IS_SUPPORTED (1 << 0)
#define DP_DSC_MAX_BITS_PER_PIXEL_LOW 0x067 /* eDP 1.4 */
#define DP_DSC_MAX_BITS_PER_PIXEL_HI 0x068 /* eDP 1.4 */
# define DP_DSC_MAX_BITS_PER_PIXEL_HI_MASK (0x3 << 0)
# define DP_DSC_MAX_BITS_PER_PIXEL_HI_SHIFT 8
#define DP_DSC_DEC_COLOR_FORMAT_CAP 0x069
# define DP_DSC_RGB (1 << 0)
# define DP_DSC_YCbCr444 (1 << 1)
# define DP_DSC_YCbCr422_Simple (1 << 2)
# define DP_DSC_YCbCr422_Native (1 << 3)
# define DP_DSC_YCbCr420_Native (1 << 4)
#define DP_DSC_DEC_COLOR_DEPTH_CAP 0x06A
# define DP_DSC_8_BPC (1 << 1)
# define DP_DSC_10_BPC (1 << 2)
# define DP_DSC_12_BPC (1 << 3)
#define DP_DSC_PEAK_THROUGHPUT 0x06B
# define DP_DSC_THROUGHPUT_MODE_0_MASK (0xf << 0)
# define DP_DSC_THROUGHPUT_MODE_0_SHIFT 0
# define DP_DSC_THROUGHPUT_MODE_0_340 (1 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_400 (2 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_450 (3 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_500 (4 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_550 (5 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_600 (6 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_650 (7 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_700 (8 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_750 (9 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_800 (10 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_850 (11 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_900 (12 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_950 (13 << 0)
# define DP_DSC_THROUGHPUT_MODE_0_1000 (14 << 0)
# define DP_DSC_THROUGHPUT_MODE_1_MASK (0xf << 4)
# define DP_DSC_THROUGHPUT_MODE_1_SHIFT 4
# define DP_DSC_THROUGHPUT_MODE_1_340 (1 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_400 (2 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_450 (3 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_500 (4 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_550 (5 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_600 (6 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_650 (7 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_700 (8 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_750 (9 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_800 (10 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_850 (11 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_900 (12 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_950 (13 << 4)
# define DP_DSC_THROUGHPUT_MODE_1_1000 (14 << 4)
#define DP_DSC_MAX_SLICE_WIDTH 0x06C
#define DP_DSC_MIN_SLICE_WIDTH_VALUE 2560
#define DP_DSC_SLICE_WIDTH_MULTIPLIER 320
#define DP_DSC_SLICE_CAP_2 0x06D
# define DP_DSC_16_PER_DP_DSC_SINK (1 << 0)
# define DP_DSC_20_PER_DP_DSC_SINK (1 << 1)
# define DP_DSC_24_PER_DP_DSC_SINK (1 << 2)
#define DP_DSC_BITS_PER_PIXEL_INC 0x06F
# define DP_DSC_BITS_PER_PIXEL_1_16 0x0
# define DP_DSC_BITS_PER_PIXEL_1_8 0x1
# define DP_DSC_BITS_PER_PIXEL_1_4 0x2
# define DP_DSC_BITS_PER_PIXEL_1_2 0x3
# define DP_DSC_BITS_PER_PIXEL_1 0x4
#define DP_PSR_SUPPORT 0x070 /* XXX 1.2? */
# define DP_PSR_IS_SUPPORTED 1
# define DP_PSR2_IS_SUPPORTED 2 /* eDP 1.4 */
# define DP_PSR2_WITH_Y_COORD_IS_SUPPORTED 3 /* eDP 1.4a */
#define DP_PSR_CAPS 0x071 /* XXX 1.2? */
# define DP_PSR_NO_TRAIN_ON_EXIT 1
# define DP_PSR_SETUP_TIME_330 (0 << 1)
# define DP_PSR_SETUP_TIME_275 (1 << 1)
# define DP_PSR_SETUP_TIME_220 (2 << 1)
# define DP_PSR_SETUP_TIME_165 (3 << 1)
# define DP_PSR_SETUP_TIME_110 (4 << 1)
# define DP_PSR_SETUP_TIME_55 (5 << 1)
# define DP_PSR_SETUP_TIME_0 (6 << 1)
# define DP_PSR_SETUP_TIME_MASK (7 << 1)
# define DP_PSR_SETUP_TIME_SHIFT 1
# define DP_PSR2_SU_Y_COORDINATE_REQUIRED (1 << 4) /* eDP 1.4a */
# define DP_PSR2_SU_GRANULARITY_REQUIRED (1 << 5) /* eDP 1.4b */
/*
* 0x80-0x8f describe downstream port capabilities, but there are two layouts
* based on whether DP_DETAILED_CAP_INFO_AVAILABLE was set. If it was not,
* each port's descriptor is one byte wide. If it was set, each port's is
* four bytes wide, starting with the one byte from the base info. As of
* DP interop v1.1a only VGA defines additional detail.
*/
/* offset 0 */
#define DP_DOWNSTREAM_PORT_0 0x80
# define DP_DS_PORT_TYPE_MASK (7 << 0)
# define DP_DS_PORT_TYPE_DP 0
# define DP_DS_PORT_TYPE_VGA 1
# define DP_DS_PORT_TYPE_DVI 2
# define DP_DS_PORT_TYPE_HDMI 3
# define DP_DS_PORT_TYPE_NON_EDID 4
# define DP_DS_PORT_TYPE_DP_DUALMODE 5
# define DP_DS_PORT_TYPE_WIRELESS 6
# define DP_DS_PORT_HPD (1 << 3)
/* offset 1 for VGA is maximum megapixels per second / 8 */
/* offset 2 */
# define DP_DS_MAX_BPC_MASK (3 << 0)
# define DP_DS_8BPC 0
# define DP_DS_10BPC 1
# define DP_DS_12BPC 2
# define DP_DS_16BPC 3
/* DP Forward error Correction Registers */
#define DP_FEC_CAPABILITY 0x090 /* 1.4 */
# define DP_FEC_CAPABLE (1 << 0)
# define DP_FEC_UNCORR_BLK_ERROR_COUNT_CAP (1 << 1)
# define DP_FEC_CORR_BLK_ERROR_COUNT_CAP (1 << 2)
# define DP_FEC_BIT_ERROR_COUNT_CAP (1 << 3)
/* link configuration */
#define DP_LINK_BW_SET 0x100
# define DP_LINK_RATE_TABLE 0x00 /* eDP 1.4 */
# define DP_LINK_BW_1_62 0x06
# define DP_LINK_BW_2_7 0x0a
# define DP_LINK_BW_5_4 0x14 /* 1.2 */
# define DP_LINK_BW_8_1 0x1e /* 1.4 */
#define DP_LANE_COUNT_SET 0x101
# define DP_LANE_COUNT_MASK 0x0f
# define DP_LANE_COUNT_ENHANCED_FRAME_EN (1 << 7)
#define DP_TRAINING_PATTERN_SET 0x102
# define DP_TRAINING_PATTERN_DISABLE 0
# define DP_TRAINING_PATTERN_1 1
# define DP_TRAINING_PATTERN_2 2
# define DP_TRAINING_PATTERN_3 3 /* 1.2 */
# define DP_TRAINING_PATTERN_4 7 /* 1.4 */
# define DP_TRAINING_PATTERN_MASK 0x3
# define DP_TRAINING_PATTERN_MASK_1_4 0xf
/* DPCD 1.1 only. For DPCD >= 1.2 see per-lane DP_LINK_QUAL_LANEn_SET */
# define DP_LINK_QUAL_PATTERN_11_DISABLE (0 << 2)
# define DP_LINK_QUAL_PATTERN_11_D10_2 (1 << 2)
# define DP_LINK_QUAL_PATTERN_11_ERROR_RATE (2 << 2)
# define DP_LINK_QUAL_PATTERN_11_PRBS7 (3 << 2)
# define DP_LINK_QUAL_PATTERN_11_MASK (3 << 2)
# define DP_RECOVERED_CLOCK_OUT_EN (1 << 4)
# define DP_LINK_SCRAMBLING_DISABLE (1 << 5)
# define DP_SYMBOL_ERROR_COUNT_BOTH (0 << 6)
# define DP_SYMBOL_ERROR_COUNT_DISPARITY (1 << 6)
# define DP_SYMBOL_ERROR_COUNT_SYMBOL (2 << 6)
# define DP_SYMBOL_ERROR_COUNT_MASK (3 << 6)
#define DP_TRAINING_LANE0_SET 0x103
#define DP_TRAINING_LANE1_SET 0x104
#define DP_TRAINING_LANE2_SET 0x105
#define DP_TRAINING_LANE3_SET 0x106
# define DP_TRAIN_VOLTAGE_SWING_MASK 0x3
# define DP_TRAIN_VOLTAGE_SWING_SHIFT 0
# define DP_TRAIN_MAX_SWING_REACHED (1 << 2)
# define DP_TRAIN_VOLTAGE_SWING_LEVEL_0 (0 << 0)
# define DP_TRAIN_VOLTAGE_SWING_LEVEL_1 (1 << 0)
# define DP_TRAIN_VOLTAGE_SWING_LEVEL_2 (2 << 0)
# define DP_TRAIN_VOLTAGE_SWING_LEVEL_3 (3 << 0)
# define DP_TRAIN_PRE_EMPHASIS_MASK (3 << 3)
# define DP_TRAIN_PRE_EMPH_LEVEL_0 (0 << 3)
# define DP_TRAIN_PRE_EMPH_LEVEL_1 (1 << 3)
# define DP_TRAIN_PRE_EMPH_LEVEL_2 (2 << 3)
# define DP_TRAIN_PRE_EMPH_LEVEL_3 (3 << 3)
# define DP_TRAIN_PRE_EMPHASIS_SHIFT 3
# define DP_TRAIN_MAX_PRE_EMPHASIS_REACHED (1 << 5)
#define DP_DOWNSPREAD_CTRL 0x107
# define DP_SPREAD_AMP_0_5 (1 << 4)
# define DP_MSA_TIMING_PAR_IGNORE_EN (1 << 7) /* eDP */
#define DP_MAIN_LINK_CHANNEL_CODING_SET 0x108
# define DP_SET_ANSI_8B10B (1 << 0)
#define DP_I2C_SPEED_CONTROL_STATUS 0x109 /* DPI */
/* bitmask as for DP_I2C_SPEED_CAP */
#define DP_EDP_CONFIGURATION_SET 0x10a /* XXX 1.2? */
# define DP_ALTERNATE_SCRAMBLER_RESET_ENABLE (1 << 0)
# define DP_FRAMING_CHANGE_ENABLE (1 << 1)
# define DP_PANEL_SELF_TEST_ENABLE (1 << 7)
#define DP_LINK_QUAL_LANE0_SET 0x10b /* DPCD >= 1.2 */
#define DP_LINK_QUAL_LANE1_SET 0x10c
#define DP_LINK_QUAL_LANE2_SET 0x10d
#define DP_LINK_QUAL_LANE3_SET 0x10e
# define DP_LINK_QUAL_PATTERN_DISABLE 0
# define DP_LINK_QUAL_PATTERN_D10_2 1
# define DP_LINK_QUAL_PATTERN_ERROR_RATE 2
# define DP_LINK_QUAL_PATTERN_PRBS7 3
# define DP_LINK_QUAL_PATTERN_80BIT_CUSTOM 4
# define DP_LINK_QUAL_PATTERN_HBR2_EYE 5
# define DP_LINK_QUAL_PATTERN_MASK 7
#define DP_TRAINING_LANE0_1_SET2 0x10f
#define DP_TRAINING_LANE2_3_SET2 0x110
# define DP_LANE02_POST_CURSOR2_SET_MASK (3 << 0)
# define DP_LANE02_MAX_POST_CURSOR2_REACHED (1 << 2)
# define DP_LANE13_POST_CURSOR2_SET_MASK (3 << 4)
# define DP_LANE13_MAX_POST_CURSOR2_REACHED (1 << 6)
#define DP_MSTM_CTRL 0x111 /* 1.2 */
# define DP_MST_EN (1 << 0)
# define DP_UP_REQ_EN (1 << 1)
# define DP_UPSTREAM_IS_SRC (1 << 2)
#define DP_AUDIO_DELAY0 0x112 /* 1.2 */
#define DP_AUDIO_DELAY1 0x113
#define DP_AUDIO_DELAY2 0x114
#define DP_LINK_RATE_SET 0x115 /* eDP 1.4 */
# define DP_LINK_RATE_SET_SHIFT 0
# define DP_LINK_RATE_SET_MASK (7 << 0)
#define DP_RECEIVER_ALPM_CONFIG 0x116 /* eDP 1.4 */
# define DP_ALPM_ENABLE (1 << 0)
# define DP_ALPM_LOCK_ERROR_IRQ_HPD_ENABLE (1 << 1)
#define DP_SINK_DEVICE_AUX_FRAME_SYNC_CONF 0x117 /* eDP 1.4 */
# define DP_AUX_FRAME_SYNC_ENABLE (1 << 0)
# define DP_IRQ_HPD_ENABLE (1 << 1)
#define DP_UPSTREAM_DEVICE_DP_PWR_NEED 0x118 /* 1.2 */
# define DP_PWR_NOT_NEEDED (1 << 0)
#define DP_FEC_CONFIGURATION 0x120 /* 1.4 */
# define DP_FEC_READY (1 << 0)
# define DP_FEC_ERR_COUNT_SEL_MASK (7 << 1)
# define DP_FEC_ERR_COUNT_DIS (0 << 1)
# define DP_FEC_UNCORR_BLK_ERROR_COUNT (1 << 1)
# define DP_FEC_CORR_BLK_ERROR_COUNT (2 << 1)
# define DP_FEC_BIT_ERROR_COUNT (3 << 1)
# define DP_FEC_LANE_SELECT_MASK (3 << 4)
# define DP_FEC_LANE_0_SELECT (0 << 4)
# define DP_FEC_LANE_1_SELECT (1 << 4)
# define DP_FEC_LANE_2_SELECT (2 << 4)
# define DP_FEC_LANE_3_SELECT (3 << 4)
#define DP_AUX_FRAME_SYNC_VALUE 0x15c /* eDP 1.4 */
# define DP_AUX_FRAME_SYNC_VALID (1 << 0)
#define DP_DSC_ENABLE 0x160 /* DP 1.4 */
# define DP_DECOMPRESSION_EN (1 << 0)
#define DP_PSR_EN_CFG 0x170 /* XXX 1.2? */
# define DP_PSR_ENABLE (1 << 0)
# define DP_PSR_MAIN_LINK_ACTIVE (1 << 1)
# define DP_PSR_CRC_VERIFICATION (1 << 2)
# define DP_PSR_FRAME_CAPTURE (1 << 3)
# define DP_PSR_SELECTIVE_UPDATE (1 << 4)
# define DP_PSR_IRQ_HPD_WITH_CRC_ERRORS (1 << 5)
# define DP_PSR_ENABLE_PSR2 (1 << 6) /* eDP 1.4a */
#define DP_ADAPTER_CTRL 0x1a0
# define DP_ADAPTER_CTRL_FORCE_LOAD_SENSE (1 << 0)
#define DP_BRANCH_DEVICE_CTRL 0x1a1
# define DP_BRANCH_DEVICE_IRQ_HPD (1 << 0)
#define DP_PAYLOAD_ALLOCATE_SET 0x1c0
#define DP_PAYLOAD_ALLOCATE_START_TIME_SLOT 0x1c1
#define DP_PAYLOAD_ALLOCATE_TIME_SLOT_COUNT 0x1c2
#define DP_SINK_COUNT 0x200
/* prior to 1.2 bit 7 was reserved mbz */
# define DP_GET_SINK_COUNT(x) ((((x) & 0x80) >> 1) | ((x) & 0x3f))
# define DP_SINK_CP_READY (1 << 6)
#define DP_DEVICE_SERVICE_IRQ_VECTOR 0x201
# define DP_REMOTE_CONTROL_COMMAND_PENDING (1 << 0)
# define DP_AUTOMATED_TEST_REQUEST (1 << 1)
# define DP_CP_IRQ (1 << 2)
# define DP_MCCS_IRQ (1 << 3)
# define DP_DOWN_REP_MSG_RDY (1 << 4) /* 1.2 MST */
# define DP_UP_REQ_MSG_RDY (1 << 5) /* 1.2 MST */
# define DP_SINK_SPECIFIC_IRQ (1 << 6)
#define DP_LANE0_1_STATUS 0x202
#define DP_LANE2_3_STATUS 0x203
# define DP_LANE_CR_DONE (1 << 0)
# define DP_LANE_CHANNEL_EQ_DONE (1 << 1)
# define DP_LANE_SYMBOL_LOCKED (1 << 2)
#define DP_CHANNEL_EQ_BITS (DP_LANE_CR_DONE | \
DP_LANE_CHANNEL_EQ_DONE | \
DP_LANE_SYMBOL_LOCKED)
#define DP_LANE_ALIGN_STATUS_UPDATED 0x204
#define DP_INTERLANE_ALIGN_DONE (1 << 0)
#define DP_DOWNSTREAM_PORT_STATUS_CHANGED (1 << 6)
#define DP_LINK_STATUS_UPDATED (1 << 7)
#define DP_SINK_STATUS 0x205
#define DP_RECEIVE_PORT_0_STATUS (1 << 0)
#define DP_RECEIVE_PORT_1_STATUS (1 << 1)
#define DP_ADJUST_REQUEST_LANE0_1 0x206
#define DP_ADJUST_REQUEST_LANE2_3 0x207
# define DP_ADJUST_VOLTAGE_SWING_LANE0_MASK 0x03
# define DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT 0
# define DP_ADJUST_PRE_EMPHASIS_LANE0_MASK 0x0c
# define DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT 2
# define DP_ADJUST_VOLTAGE_SWING_LANE1_MASK 0x30
# define DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT 4
# define DP_ADJUST_PRE_EMPHASIS_LANE1_MASK 0xc0
# define DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT 6
#define DP_ADJUST_REQUEST_POST_CURSOR2 0x20c
#define DP_TEST_REQUEST 0x218
# define DP_TEST_LINK_TRAINING (1 << 0)
# define DP_TEST_LINK_VIDEO_PATTERN (1 << 1)
# define DP_TEST_LINK_EDID_READ (1 << 2)
# define DP_TEST_LINK_PHY_TEST_PATTERN (1 << 3) /* DPCD >= 1.1 */
# define DP_TEST_LINK_FAUX_PATTERN (1 << 4) /* DPCD >= 1.2 */
#define DP_TEST_LINK_RATE 0x219
# define DP_LINK_RATE_162 (0x6)
# define DP_LINK_RATE_27 (0xa)
#define DP_TEST_LANE_COUNT 0x220
#define DP_TEST_PATTERN 0x221
# define DP_NO_TEST_PATTERN 0x0
# define DP_COLOR_RAMP 0x1
# define DP_BLACK_AND_WHITE_VERTICAL_LINES 0x2
# define DP_COLOR_SQUARE 0x3
#define DP_TEST_H_TOTAL_HI 0x222
#define DP_TEST_H_TOTAL_LO 0x223
#define DP_TEST_V_TOTAL_HI 0x224
#define DP_TEST_V_TOTAL_LO 0x225
#define DP_TEST_H_START_HI 0x226
#define DP_TEST_H_START_LO 0x227
#define DP_TEST_V_START_HI 0x228
#define DP_TEST_V_START_LO 0x229
#define DP_TEST_HSYNC_HI 0x22A
# define DP_TEST_HSYNC_POLARITY (1 << 7)
# define DP_TEST_HSYNC_WIDTH_HI_MASK (127 << 0)
#define DP_TEST_HSYNC_WIDTH_LO 0x22B
#define DP_TEST_VSYNC_HI 0x22C
# define DP_TEST_VSYNC_POLARITY (1 << 7)
# define DP_TEST_VSYNC_WIDTH_HI_MASK (127 << 0)
#define DP_TEST_VSYNC_WIDTH_LO 0x22D
#define DP_TEST_H_WIDTH_HI 0x22E
#define DP_TEST_H_WIDTH_LO 0x22F
#define DP_TEST_V_HEIGHT_HI 0x230
#define DP_TEST_V_HEIGHT_LO 0x231
#define DP_TEST_MISC0 0x232
# define DP_TEST_SYNC_CLOCK (1 << 0)
# define DP_TEST_COLOR_FORMAT_MASK (3 << 1)
# define DP_TEST_COLOR_FORMAT_SHIFT 1
# define DP_COLOR_FORMAT_RGB (0 << 1)
# define DP_COLOR_FORMAT_YCbCr422 (1 << 1)
# define DP_COLOR_FORMAT_YCbCr444 (2 << 1)
# define DP_TEST_DYNAMIC_RANGE_CEA (1 << 3)
# define DP_TEST_YCBCR_COEFFICIENTS (1 << 4)
# define DP_YCBCR_COEFFICIENTS_ITU601 (0 << 4)
# define DP_YCBCR_COEFFICIENTS_ITU709 (1 << 4)
# define DP_TEST_BIT_DEPTH_MASK (7 << 5)
# define DP_TEST_BIT_DEPTH_SHIFT 5
# define DP_TEST_BIT_DEPTH_6 (0 << 5)
# define DP_TEST_BIT_DEPTH_8 (1 << 5)
# define DP_TEST_BIT_DEPTH_10 (2 << 5)
# define DP_TEST_BIT_DEPTH_12 (3 << 5)
# define DP_TEST_BIT_DEPTH_16 (4 << 5)
#define DP_TEST_MISC1 0x233
# define DP_TEST_REFRESH_DENOMINATOR (1 << 0)
# define DP_TEST_INTERLACED (1 << 1)
#define DP_TEST_REFRESH_RATE_NUMERATOR 0x234
#define DP_TEST_MISC0 0x232
#define DP_TEST_CRC_R_CR 0x240
#define DP_TEST_CRC_G_Y 0x242
#define DP_TEST_CRC_B_CB 0x244
#define DP_TEST_SINK_MISC 0x246
# define DP_TEST_CRC_SUPPORTED (1 << 5)
# define DP_TEST_COUNT_MASK 0xf
#define DP_TEST_PHY_PATTERN 0x248
#define DP_TEST_80BIT_CUSTOM_PATTERN_7_0 0x250
#define DP_TEST_80BIT_CUSTOM_PATTERN_15_8 0x251
#define DP_TEST_80BIT_CUSTOM_PATTERN_23_16 0x252
#define DP_TEST_80BIT_CUSTOM_PATTERN_31_24 0x253
#define DP_TEST_80BIT_CUSTOM_PATTERN_39_32 0x254
#define DP_TEST_80BIT_CUSTOM_PATTERN_47_40 0x255
#define DP_TEST_80BIT_CUSTOM_PATTERN_55_48 0x256
#define DP_TEST_80BIT_CUSTOM_PATTERN_63_56 0x257
#define DP_TEST_80BIT_CUSTOM_PATTERN_71_64 0x258
#define DP_TEST_80BIT_CUSTOM_PATTERN_79_72 0x259
#define DP_TEST_RESPONSE 0x260
# define DP_TEST_ACK (1 << 0)
# define DP_TEST_NAK (1 << 1)
# define DP_TEST_EDID_CHECKSUM_WRITE (1 << 2)
#define DP_TEST_EDID_CHECKSUM 0x261
#define DP_TEST_SINK 0x270
# define DP_TEST_SINK_START (1 << 0)
#define DP_FEC_STATUS 0x280 /* 1.4 */
# define DP_FEC_DECODE_EN_DETECTED (1 << 0)
# define DP_FEC_DECODE_DIS_DETECTED (1 << 1)
#define DP_FEC_ERROR_COUNT_LSB 0x0281 /* 1.4 */
#define DP_FEC_ERROR_COUNT_MSB 0x0282 /* 1.4 */
# define DP_FEC_ERROR_COUNT_MASK 0x7F
# define DP_FEC_ERR_COUNT_VALID (1 << 7)
#define DP_PAYLOAD_TABLE_UPDATE_STATUS 0x2c0 /* 1.2 MST */
# define DP_PAYLOAD_TABLE_UPDATED (1 << 0)
# define DP_PAYLOAD_ACT_HANDLED (1 << 1)
#define DP_VC_PAYLOAD_ID_SLOT_1 0x2c1 /* 1.2 MST */
/* up to ID_SLOT_63 at 0x2ff */
#define DP_SOURCE_OUI 0x300
#define DP_SINK_OUI 0x400
#define DP_BRANCH_OUI 0x500
#define DP_BRANCH_ID 0x503
#define DP_BRANCH_REVISION_START 0x509
#define DP_BRANCH_HW_REV 0x509
#define DP_BRANCH_SW_REV 0x50A
#define DP_SET_POWER 0x600
# define DP_SET_POWER_D0 0x1
# define DP_SET_POWER_D3 0x2
# define DP_SET_POWER_MASK 0x3
# define DP_SET_POWER_D3_AUX_ON 0x5
#define DP_EDP_DPCD_REV 0x700 /* eDP 1.2 */
# define DP_EDP_11 0x00
# define DP_EDP_12 0x01
# define DP_EDP_13 0x02
# define DP_EDP_14 0x03
# define DP_EDP_14a 0x04 /* eDP 1.4a */
# define DP_EDP_14b 0x05 /* eDP 1.4b */
#define DP_EDP_GENERAL_CAP_1 0x701
# define DP_EDP_TCON_BACKLIGHT_ADJUSTMENT_CAP (1 << 0)
# define DP_EDP_BACKLIGHT_PIN_ENABLE_CAP (1 << 1)
# define DP_EDP_BACKLIGHT_AUX_ENABLE_CAP (1 << 2)
# define DP_EDP_PANEL_SELF_TEST_PIN_ENABLE_CAP (1 << 3)
# define DP_EDP_PANEL_SELF_TEST_AUX_ENABLE_CAP (1 << 4)
# define DP_EDP_FRC_ENABLE_CAP (1 << 5)
# define DP_EDP_COLOR_ENGINE_CAP (1 << 6)
# define DP_EDP_SET_POWER_CAP (1 << 7)
#define DP_EDP_BACKLIGHT_ADJUSTMENT_CAP 0x702
# define DP_EDP_BACKLIGHT_BRIGHTNESS_PWM_PIN_CAP (1 << 0)
# define DP_EDP_BACKLIGHT_BRIGHTNESS_AUX_SET_CAP (1 << 1)
# define DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT (1 << 2)
# define DP_EDP_BACKLIGHT_AUX_PWM_PRODUCT_CAP (1 << 3)
# define DP_EDP_BACKLIGHT_FREQ_PWM_PIN_PASSTHRU_CAP (1 << 4)
# define DP_EDP_BACKLIGHT_FREQ_AUX_SET_CAP (1 << 5)
# define DP_EDP_DYNAMIC_BACKLIGHT_CAP (1 << 6)
# define DP_EDP_VBLANK_BACKLIGHT_UPDATE_CAP (1 << 7)
#define DP_EDP_GENERAL_CAP_2 0x703
# define DP_EDP_OVERDRIVE_ENGINE_ENABLED (1 << 0)
#define DP_EDP_GENERAL_CAP_3 0x704 /* eDP 1.4 */
# define DP_EDP_X_REGION_CAP_MASK (0xf << 0)
# define DP_EDP_X_REGION_CAP_SHIFT 0
# define DP_EDP_Y_REGION_CAP_MASK (0xf << 4)
# define DP_EDP_Y_REGION_CAP_SHIFT 4
#define DP_EDP_DISPLAY_CONTROL_REGISTER 0x720
# define DP_EDP_BACKLIGHT_ENABLE (1 << 0)
# define DP_EDP_BLACK_VIDEO_ENABLE (1 << 1)
# define DP_EDP_FRC_ENABLE (1 << 2)
# define DP_EDP_COLOR_ENGINE_ENABLE (1 << 3)
# define DP_EDP_VBLANK_BACKLIGHT_UPDATE_ENABLE (1 << 7)
#define DP_EDP_BACKLIGHT_MODE_SET_REGISTER 0x721
# define DP_EDP_BACKLIGHT_CONTROL_MODE_MASK (3 << 0)
# define DP_EDP_BACKLIGHT_CONTROL_MODE_PWM (0 << 0)
# define DP_EDP_BACKLIGHT_CONTROL_MODE_PRESET (1 << 0)
# define DP_EDP_BACKLIGHT_CONTROL_MODE_DPCD (2 << 0)
# define DP_EDP_BACKLIGHT_CONTROL_MODE_PRODUCT (3 << 0)
# define DP_EDP_BACKLIGHT_FREQ_PWM_PIN_PASSTHRU_ENABLE (1 << 2)
# define DP_EDP_BACKLIGHT_FREQ_AUX_SET_ENABLE (1 << 3)
# define DP_EDP_DYNAMIC_BACKLIGHT_ENABLE (1 << 4)
# define DP_EDP_REGIONAL_BACKLIGHT_ENABLE (1 << 5)
# define DP_EDP_UPDATE_REGION_BRIGHTNESS (1 << 6) /* eDP 1.4 */
#define DP_EDP_BACKLIGHT_BRIGHTNESS_MSB 0x722
#define DP_EDP_BACKLIGHT_BRIGHTNESS_LSB 0x723
#define DP_EDP_PWMGEN_BIT_COUNT 0x724
#define DP_EDP_PWMGEN_BIT_COUNT_CAP_MIN 0x725
#define DP_EDP_PWMGEN_BIT_COUNT_CAP_MAX 0x726
# define DP_EDP_PWMGEN_BIT_COUNT_MASK (0x1f << 0)
#define DP_EDP_BACKLIGHT_CONTROL_STATUS 0x727
#define DP_EDP_BACKLIGHT_FREQ_SET 0x728
# define DP_EDP_BACKLIGHT_FREQ_BASE_KHZ 27000
#define DP_EDP_BACKLIGHT_FREQ_CAP_MIN_MSB 0x72a
#define DP_EDP_BACKLIGHT_FREQ_CAP_MIN_MID 0x72b
#define DP_EDP_BACKLIGHT_FREQ_CAP_MIN_LSB 0x72c
#define DP_EDP_BACKLIGHT_FREQ_CAP_MAX_MSB 0x72d
#define DP_EDP_BACKLIGHT_FREQ_CAP_MAX_MID 0x72e
#define DP_EDP_BACKLIGHT_FREQ_CAP_MAX_LSB 0x72f
#define DP_EDP_DBC_MINIMUM_BRIGHTNESS_SET 0x732
#define DP_EDP_DBC_MAXIMUM_BRIGHTNESS_SET 0x733
#define DP_EDP_REGIONAL_BACKLIGHT_BASE 0x740 /* eDP 1.4 */
#define DP_EDP_REGIONAL_BACKLIGHT_0 0x741 /* eDP 1.4 */
#define DP_SIDEBAND_MSG_DOWN_REQ_BASE 0x1000 /* 1.2 MST */
#define DP_SIDEBAND_MSG_UP_REP_BASE 0x1200 /* 1.2 MST */
#define DP_SIDEBAND_MSG_DOWN_REP_BASE 0x1400 /* 1.2 MST */
#define DP_SIDEBAND_MSG_UP_REQ_BASE 0x1600 /* 1.2 MST */
#define DP_SINK_COUNT_ESI 0x2002 /* 1.2 */
/* 0-5 sink count */
# define DP_SINK_COUNT_CP_READY (1 << 6)
#define DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0 0x2003 /* 1.2 */
#define DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1 0x2004 /* 1.2 */
# define DP_RX_GTC_MSTR_REQ_STATUS_CHANGE (1 << 0)
# define DP_LOCK_ACQUISITION_REQUEST (1 << 1)
# define DP_CEC_IRQ (1 << 2)
#define DP_LINK_SERVICE_IRQ_VECTOR_ESI0 0x2005 /* 1.2 */
#define DP_PSR_ERROR_STATUS 0x2006 /* XXX 1.2? */
# define DP_PSR_LINK_CRC_ERROR (1 << 0)
# define DP_PSR_RFB_STORAGE_ERROR (1 << 1)
# define DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR (1 << 2) /* eDP 1.4 */
#define DP_PSR_ESI 0x2007 /* XXX 1.2? */
# define DP_PSR_CAPS_CHANGE (1 << 0)
#define DP_PSR_STATUS 0x2008 /* XXX 1.2? */
# define DP_PSR_SINK_INACTIVE 0
# define DP_PSR_SINK_ACTIVE_SRC_SYNCED 1
# define DP_PSR_SINK_ACTIVE_RFB 2
# define DP_PSR_SINK_ACTIVE_SINK_SYNCED 3
# define DP_PSR_SINK_ACTIVE_RESYNC 4
# define DP_PSR_SINK_INTERNAL_ERROR 7
# define DP_PSR_SINK_STATE_MASK 0x07
#define DP_SYNCHRONIZATION_LATENCY_IN_SINK 0x2009 /* edp 1.4 */
# define DP_MAX_RESYNC_FRAME_COUNT_MASK (0xf << 0)
# define DP_MAX_RESYNC_FRAME_COUNT_SHIFT 0
# define DP_LAST_ACTUAL_SYNCHRONIZATION_LATENCY_MASK (0xf << 4)
# define DP_LAST_ACTUAL_SYNCHRONIZATION_LATENCY_SHIFT 4
#define DP_LAST_RECEIVED_PSR_SDP 0x200a /* eDP 1.2 */
# define DP_PSR_STATE_BIT (1 << 0) /* eDP 1.2 */
# define DP_UPDATE_RFB_BIT (1 << 1) /* eDP 1.2 */
# define DP_CRC_VALID_BIT (1 << 2) /* eDP 1.2 */
# define DP_SU_VALID (1 << 3) /* eDP 1.4 */
# define DP_FIRST_SCAN_LINE_SU_REGION (1 << 4) /* eDP 1.4 */
# define DP_LAST_SCAN_LINE_SU_REGION (1 << 5) /* eDP 1.4 */
# define DP_Y_COORDINATE_VALID (1 << 6) /* eDP 1.4a */
#define DP_RECEIVER_ALPM_STATUS 0x200b /* eDP 1.4 */
# define DP_ALPM_LOCK_TIMEOUT_ERROR (1 << 0)
#define DP_LANE0_1_STATUS_ESI 0x200c /* status same as 0x202 */
#define DP_LANE2_3_STATUS_ESI 0x200d /* status same as 0x203 */
#define DP_LANE_ALIGN_STATUS_UPDATED_ESI 0x200e /* status same as 0x204 */
#define DP_SINK_STATUS_ESI 0x200f /* status same as 0x205 */
#define DP_DP13_DPCD_REV 0x2200
#define DP_DP13_MAX_LINK_RATE 0x2201
#define DP_DPRX_FEATURE_ENUMERATION_LIST 0x2210 /* DP 1.3 */
# define DP_GTC_CAP (1 << 0) /* DP 1.3 */
# define DP_SST_SPLIT_SDP_CAP (1 << 1) /* DP 1.4 */
# define DP_AV_SYNC_CAP (1 << 2) /* DP 1.3 */
# define DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED (1 << 3) /* DP 1.3 */
# define DP_VSC_EXT_VESA_SDP_SUPPORTED (1 << 4) /* DP 1.4 */
# define DP_VSC_EXT_VESA_SDP_CHAINING_SUPPORTED (1 << 5) /* DP 1.4 */
# define DP_VSC_EXT_CEA_SDP_SUPPORTED (1 << 6) /* DP 1.4 */
# define DP_VSC_EXT_CEA_SDP_CHAINING_SUPPORTED (1 << 7) /* DP 1.4 */
/* HDMI CEC tunneling over AUX DP 1.3 section 5.3.3.3.1 DPCD 1.4+ */
#define DP_CEC_TUNNELING_CAPABILITY 0x3000
# define DP_CEC_TUNNELING_CAPABLE (1 << 0)
# define DP_CEC_SNOOPING_CAPABLE (1 << 1)
# define DP_CEC_MULTIPLE_LA_CAPABLE (1 << 2)
#define DP_CEC_TUNNELING_CONTROL 0x3001
# define DP_CEC_TUNNELING_ENABLE (1 << 0)
# define DP_CEC_SNOOPING_ENABLE (1 << 1)
#define DP_CEC_RX_MESSAGE_INFO 0x3002
# define DP_CEC_RX_MESSAGE_LEN_MASK (0xf << 0)
# define DP_CEC_RX_MESSAGE_LEN_SHIFT 0
# define DP_CEC_RX_MESSAGE_HPD_STATE (1 << 4)
# define DP_CEC_RX_MESSAGE_HPD_LOST (1 << 5)
# define DP_CEC_RX_MESSAGE_ACKED (1 << 6)
# define DP_CEC_RX_MESSAGE_ENDED (1 << 7)
#define DP_CEC_TX_MESSAGE_INFO 0x3003
# define DP_CEC_TX_MESSAGE_LEN_MASK (0xf << 0)
# define DP_CEC_TX_MESSAGE_LEN_SHIFT 0
# define DP_CEC_TX_RETRY_COUNT_MASK (0x7 << 4)
# define DP_CEC_TX_RETRY_COUNT_SHIFT 4
# define DP_CEC_TX_MESSAGE_SEND (1 << 7)
#define DP_CEC_TUNNELING_IRQ_FLAGS 0x3004
# define DP_CEC_RX_MESSAGE_INFO_VALID (1 << 0)
# define DP_CEC_RX_MESSAGE_OVERFLOW (1 << 1)
# define DP_CEC_TX_MESSAGE_SENT (1 << 4)
# define DP_CEC_TX_LINE_ERROR (1 << 5)
# define DP_CEC_TX_ADDRESS_NACK_ERROR (1 << 6)
# define DP_CEC_TX_DATA_NACK_ERROR (1 << 7)
#define DP_CEC_LOGICAL_ADDRESS_MASK 0x300E /* 0x300F word */
# define DP_CEC_LOGICAL_ADDRESS_0 (1 << 0)
# define DP_CEC_LOGICAL_ADDRESS_1 (1 << 1)
# define DP_CEC_LOGICAL_ADDRESS_2 (1 << 2)
# define DP_CEC_LOGICAL_ADDRESS_3 (1 << 3)
# define DP_CEC_LOGICAL_ADDRESS_4 (1 << 4)
# define DP_CEC_LOGICAL_ADDRESS_5 (1 << 5)
# define DP_CEC_LOGICAL_ADDRESS_6 (1 << 6)
# define DP_CEC_LOGICAL_ADDRESS_7 (1 << 7)
#define DP_CEC_LOGICAL_ADDRESS_MASK_2 0x300F /* 0x300E word */
# define DP_CEC_LOGICAL_ADDRESS_8 (1 << 0)
# define DP_CEC_LOGICAL_ADDRESS_9 (1 << 1)
# define DP_CEC_LOGICAL_ADDRESS_10 (1 << 2)
# define DP_CEC_LOGICAL_ADDRESS_11 (1 << 3)
# define DP_CEC_LOGICAL_ADDRESS_12 (1 << 4)
# define DP_CEC_LOGICAL_ADDRESS_13 (1 << 5)
# define DP_CEC_LOGICAL_ADDRESS_14 (1 << 6)
# define DP_CEC_LOGICAL_ADDRESS_15 (1 << 7)
#define DP_CEC_RX_MESSAGE_BUFFER 0x3010
#define DP_CEC_TX_MESSAGE_BUFFER 0x3020
#define DP_CEC_MESSAGE_BUFFER_LENGTH 0x10
#define DP_AUX_HDCP_BKSV 0x68000
#define DP_AUX_HDCP_RI_PRIME 0x68005
#define DP_AUX_HDCP_AKSV 0x68007
#define DP_AUX_HDCP_AN 0x6800C
#define DP_AUX_HDCP_V_PRIME(h) (0x68014 + h * 4)
#define DP_AUX_HDCP_BCAPS 0x68028
# define DP_BCAPS_REPEATER_PRESENT BIT(1)
# define DP_BCAPS_HDCP_CAPABLE BIT(0)
#define DP_AUX_HDCP_BSTATUS 0x68029
# define DP_BSTATUS_REAUTH_REQ BIT(3)
# define DP_BSTATUS_LINK_FAILURE BIT(2)
# define DP_BSTATUS_R0_PRIME_READY BIT(1)
# define DP_BSTATUS_READY BIT(0)
#define DP_AUX_HDCP_BINFO 0x6802A
#define DP_AUX_HDCP_KSV_FIFO 0x6802C
#define DP_AUX_HDCP_AINFO 0x6803B
/* DP HDCP2.2 parameter offsets in DPCD address space */
#define DP_HDCP_2_2_REG_RTX_OFFSET 0x69000
#define DP_HDCP_2_2_REG_TXCAPS_OFFSET 0x69008
#define DP_HDCP_2_2_REG_CERT_RX_OFFSET 0x6900B
#define DP_HDCP_2_2_REG_RRX_OFFSET 0x69215
#define DP_HDCP_2_2_REG_RX_CAPS_OFFSET 0x6921D
#define DP_HDCP_2_2_REG_EKPUB_KM_OFFSET 0x69220
#define DP_HDCP_2_2_REG_EKH_KM_WR_OFFSET 0x692A0
#define DP_HDCP_2_2_REG_M_OFFSET 0x692B0
#define DP_HDCP_2_2_REG_HPRIME_OFFSET 0x692C0
#define DP_HDCP_2_2_REG_EKH_KM_RD_OFFSET 0x692E0
#define DP_HDCP_2_2_REG_RN_OFFSET 0x692F0
#define DP_HDCP_2_2_REG_LPRIME_OFFSET 0x692F8
#define DP_HDCP_2_2_REG_EDKEY_KS_OFFSET 0x69318
#define DP_HDCP_2_2_REG_RIV_OFFSET 0x69328
#define DP_HDCP_2_2_REG_RXINFO_OFFSET 0x69330
#define DP_HDCP_2_2_REG_SEQ_NUM_V_OFFSET 0x69332
#define DP_HDCP_2_2_REG_VPRIME_OFFSET 0x69335
#define DP_HDCP_2_2_REG_RECV_ID_LIST_OFFSET 0x69345
#define DP_HDCP_2_2_REG_V_OFFSET 0x693E0
#define DP_HDCP_2_2_REG_SEQ_NUM_M_OFFSET 0x693F0
#define DP_HDCP_2_2_REG_K_OFFSET 0x693F3
#define DP_HDCP_2_2_REG_STREAM_ID_TYPE_OFFSET 0x693F5
#define DP_HDCP_2_2_REG_MPRIME_OFFSET 0x69473
#define DP_HDCP_2_2_REG_RXSTATUS_OFFSET 0x69493
#define DP_HDCP_2_2_REG_STREAM_TYPE_OFFSET 0x69494
#define DP_HDCP_2_2_REG_DBG_OFFSET 0x69518
/* DP HDCP message start offsets in DPCD address space */
#define DP_HDCP_2_2_AKE_INIT_OFFSET DP_HDCP_2_2_REG_RTX_OFFSET
#define DP_HDCP_2_2_AKE_SEND_CERT_OFFSET DP_HDCP_2_2_REG_CERT_RX_OFFSET
#define DP_HDCP_2_2_AKE_NO_STORED_KM_OFFSET DP_HDCP_2_2_REG_EKPUB_KM_OFFSET
#define DP_HDCP_2_2_AKE_STORED_KM_OFFSET DP_HDCP_2_2_REG_EKH_KM_WR_OFFSET
#define DP_HDCP_2_2_AKE_SEND_HPRIME_OFFSET DP_HDCP_2_2_REG_HPRIME_OFFSET
#define DP_HDCP_2_2_AKE_SEND_PAIRING_INFO_OFFSET \
DP_HDCP_2_2_REG_EKH_KM_RD_OFFSET
#define DP_HDCP_2_2_LC_INIT_OFFSET DP_HDCP_2_2_REG_RN_OFFSET
#define DP_HDCP_2_2_LC_SEND_LPRIME_OFFSET DP_HDCP_2_2_REG_LPRIME_OFFSET
#define DP_HDCP_2_2_SKE_SEND_EKS_OFFSET DP_HDCP_2_2_REG_EDKEY_KS_OFFSET
#define DP_HDCP_2_2_REP_SEND_RECVID_LIST_OFFSET DP_HDCP_2_2_REG_RXINFO_OFFSET
#define DP_HDCP_2_2_REP_SEND_ACK_OFFSET DP_HDCP_2_2_REG_V_OFFSET
#define DP_HDCP_2_2_REP_STREAM_MANAGE_OFFSET DP_HDCP_2_2_REG_SEQ_NUM_M_OFFSET
#define DP_HDCP_2_2_REP_STREAM_READY_OFFSET DP_HDCP_2_2_REG_MPRIME_OFFSET
#define HDCP_2_2_DP_RXSTATUS_LEN 1
#define HDCP_2_2_DP_RXSTATUS_READY(x) ((x) & BIT(0))
#define HDCP_2_2_DP_RXSTATUS_H_PRIME(x) ((x) & BIT(1))
#define HDCP_2_2_DP_RXSTATUS_PAIRING(x) ((x) & BIT(2))
#define HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(x) ((x) & BIT(3))
#define HDCP_2_2_DP_RXSTATUS_LINK_FAILED(x) ((x) & BIT(4))
/* DP 1.2 Sideband message defines */
/* peer device type - DP 1.2a Table 2-92 */
#define DP_PEER_DEVICE_NONE 0x0
#define DP_PEER_DEVICE_SOURCE_OR_SST 0x1
#define DP_PEER_DEVICE_MST_BRANCHING 0x2
#define DP_PEER_DEVICE_SST_SINK 0x3
#define DP_PEER_DEVICE_DP_LEGACY_CONV 0x4
/* DP 1.2 MST sideband request names DP 1.2a Table 2-80 */
#define DP_LINK_ADDRESS 0x01
#define DP_CONNECTION_STATUS_NOTIFY 0x02
#define DP_ENUM_PATH_RESOURCES 0x10
#define DP_ALLOCATE_PAYLOAD 0x11
#define DP_QUERY_PAYLOAD 0x12
#define DP_RESOURCE_STATUS_NOTIFY 0x13
#define DP_CLEAR_PAYLOAD_ID_TABLE 0x14
#define DP_REMOTE_DPCD_READ 0x20
#define DP_REMOTE_DPCD_WRITE 0x21
#define DP_REMOTE_I2C_READ 0x22
#define DP_REMOTE_I2C_WRITE 0x23
#define DP_POWER_UP_PHY 0x24
#define DP_POWER_DOWN_PHY 0x25
#define DP_SINK_EVENT_NOTIFY 0x30
#define DP_QUERY_STREAM_ENC_STATUS 0x38
/* DP 1.2 MST sideband nak reasons - table 2.84 */
#define DP_NAK_WRITE_FAILURE 0x01
#define DP_NAK_INVALID_READ 0x02
#define DP_NAK_CRC_FAILURE 0x03
#define DP_NAK_BAD_PARAM 0x04
#define DP_NAK_DEFER 0x05
#define DP_NAK_LINK_FAILURE 0x06
#define DP_NAK_NO_RESOURCES 0x07
#define DP_NAK_DPCD_FAIL 0x08
#define DP_NAK_I2C_NAK 0x09
#define DP_NAK_ALLOCATE_FAIL 0x0a
#define MODE_I2C_START 1
#define MODE_I2C_WRITE 2
#define MODE_I2C_READ 4
#define MODE_I2C_STOP 8
/* DP 1.2 MST PORTs - Section 2.5.1 v1.2a spec */
#define DP_MST_PHYSICAL_PORT_0 0
#define DP_MST_LOGICAL_PORT_0 8
#define DP_LINK_STATUS_SIZE 6
bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE],
int lane_count);
bool drm_dp_clock_recovery_ok(const u8 link_status[DP_LINK_STATUS_SIZE],
int lane_count);
u8 drm_dp_get_adjust_request_voltage(const u8 link_status[DP_LINK_STATUS_SIZE],
int lane);
u8 drm_dp_get_adjust_request_pre_emphasis(const u8 link_status[DP_LINK_STATUS_SIZE],
int lane);
#define DP_BRANCH_OUI_HEADER_SIZE 0xc
#define DP_RECEIVER_CAP_SIZE 0xf
#define DP_DSC_RECEIVER_CAP_SIZE 0xf
#define EDP_PSR_RECEIVER_CAP_SIZE 2
#define EDP_DISPLAY_CTL_CAP_SIZE 3
void drm_dp_link_train_clock_recovery_delay(const u8 dpcd[DP_RECEIVER_CAP_SIZE]);
void drm_dp_link_train_channel_eq_delay(const u8 dpcd[DP_RECEIVER_CAP_SIZE]);
u8 drm_dp_link_rate_to_bw_code(int link_rate);
int drm_dp_bw_code_to_link_rate(u8 link_bw);
#define DP_SDP_AUDIO_TIMESTAMP 0x01
#define DP_SDP_AUDIO_STREAM 0x02
#define DP_SDP_EXTENSION 0x04 /* DP 1.1 */
#define DP_SDP_AUDIO_COPYMANAGEMENT 0x05 /* DP 1.2 */
#define DP_SDP_ISRC 0x06 /* DP 1.2 */
#define DP_SDP_VSC 0x07 /* DP 1.2 */
#define DP_SDP_CAMERA_GENERIC(i) (0x08 + (i)) /* 0-7, DP 1.3 */
#define DP_SDP_PPS 0x10 /* DP 1.4 */
#define DP_SDP_VSC_EXT_VESA 0x20 /* DP 1.4 */
#define DP_SDP_VSC_EXT_CEA 0x21 /* DP 1.4 */
/* 0x80+ CEA-861 infoframe types */
struct dp_sdp_header {
u8 HB0; /* Secondary Data Packet ID */
u8 HB1; /* Secondary Data Packet Type */
u8 HB2; /* Secondary Data Packet Specific header, Byte 0 */
u8 HB3; /* Secondary Data packet Specific header, Byte 1 */
} __packed;
#define EDP_SDP_HEADER_REVISION_MASK 0x1F
#define EDP_SDP_HEADER_VALID_PAYLOAD_BYTES 0x1F
#define DP_SDP_PPS_HEADER_PAYLOAD_BYTES_MINUS_1 0x7F
struct edp_vsc_psr {
struct dp_sdp_header sdp_header;
u8 DB0; /* Stereo Interface */
u8 DB1; /* 0 - PSR State; 1 - Update RFB; 2 - CRC Valid */
u8 DB2; /* CRC value bits 7:0 of the R or Cr component */
u8 DB3; /* CRC value bits 15:8 of the R or Cr component */
u8 DB4; /* CRC value bits 7:0 of the G or Y component */
u8 DB5; /* CRC value bits 15:8 of the G or Y component */
u8 DB6; /* CRC value bits 7:0 of the B or Cb component */
u8 DB7; /* CRC value bits 15:8 of the B or Cb component */
u8 DB8_31[24]; /* Reserved */
} __packed;
#define EDP_VSC_PSR_STATE_ACTIVE (1<<0)
#define EDP_VSC_PSR_UPDATE_RFB (1<<1)
#define EDP_VSC_PSR_CRC_VALUES_VALID (1<<2)
int drm_dp_psr_setup_time(const u8 psr_cap[EDP_PSR_RECEIVER_CAP_SIZE]);
static inline int
drm_dp_max_link_rate(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
{
return drm_dp_bw_code_to_link_rate(dpcd[DP_MAX_LINK_RATE]);
}
static inline u8
drm_dp_max_lane_count(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
{
return dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK;
}
static inline bool
drm_dp_enhanced_frame_cap(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
{
return dpcd[DP_DPCD_REV] >= 0x11 &&
(dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP);
}
static inline bool
drm_dp_tps3_supported(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
{
return dpcd[DP_DPCD_REV] >= 0x12 &&
dpcd[DP_MAX_LANE_COUNT] & DP_TPS3_SUPPORTED;
}
static inline bool
drm_dp_tps4_supported(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
{
return dpcd[DP_DPCD_REV] >= 0x14 &&
dpcd[DP_MAX_DOWNSPREAD] & DP_TPS4_SUPPORTED;
}
static inline u8
drm_dp_training_pattern_mask(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
{
return (dpcd[DP_DPCD_REV] >= 0x14) ? DP_TRAINING_PATTERN_MASK_1_4 :
DP_TRAINING_PATTERN_MASK;
}
static inline bool
drm_dp_is_branch(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
{
return dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT;
}
/* DP/eDP DSC support */
u8 drm_dp_dsc_sink_max_slice_count(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE],
bool is_edp);
u8 drm_dp_dsc_sink_line_buf_depth(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]);
int drm_dp_dsc_sink_supported_input_bpcs(const u8 dsc_dpc[DP_DSC_RECEIVER_CAP_SIZE],
u8 dsc_bpc[3]);
static inline bool
drm_dp_sink_supports_dsc(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
{
return dsc_dpcd[DP_DSC_SUPPORT - DP_DSC_SUPPORT] &
DP_DSC_DECOMPRESSION_IS_SUPPORTED;
}
static inline u16
drm_edp_dsc_sink_output_bpp(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
{
return dsc_dpcd[DP_DSC_MAX_BITS_PER_PIXEL_LOW - DP_DSC_SUPPORT] |
(dsc_dpcd[DP_DSC_MAX_BITS_PER_PIXEL_HI - DP_DSC_SUPPORT] &
DP_DSC_MAX_BITS_PER_PIXEL_HI_MASK <<
DP_DSC_MAX_BITS_PER_PIXEL_HI_SHIFT);
}
static inline u32
drm_dp_dsc_sink_max_slice_width(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
{
/* Max Slicewidth = Number of Pixels * 320 */
return dsc_dpcd[DP_DSC_MAX_SLICE_WIDTH - DP_DSC_SUPPORT] *
DP_DSC_SLICE_WIDTH_MULTIPLIER;
}
/* Forward Error Correction Support on DP 1.4 */
static inline bool
drm_dp_sink_supports_fec(const u8 fec_capable)
{
return fec_capable & DP_FEC_CAPABLE;
}
/*
* DisplayPort AUX channel
*/
/**
* struct drm_dp_aux_msg - DisplayPort AUX channel transaction
* @address: address of the (first) register to access
* @request: contains the type of transaction (see DP_AUX_* macros)
* @reply: upon completion, contains the reply type of the transaction
* @buffer: pointer to a transmission or reception buffer
* @size: size of @buffer
*/
struct drm_dp_aux_msg {
unsigned int address;
u8 request;
u8 reply;
void *buffer;
size_t size;
};
struct cec_adapter;
struct edid;
/**
* struct drm_dp_aux_cec - DisplayPort CEC-Tunneling-over-AUX
* @lock: mutex protecting this struct
* @adap: the CEC adapter for CEC-Tunneling-over-AUX support.
* @name: name of the CEC adapter
* @parent: parent device of the CEC adapter
* @unregister_work: unregister the CEC adapter
*/
struct drm_dp_aux_cec {
struct mutex lock;
struct cec_adapter *adap;
const char *name;
struct device *parent;
struct delayed_work unregister_work;
};
/**
* struct drm_dp_aux - DisplayPort AUX channel
* @name: user-visible name of this AUX channel and the I2C-over-AUX adapter
* @ddc: I2C adapter that can be used for I2C-over-AUX communication
* @dev: pointer to struct device that is the parent for this AUX channel
* @crtc: backpointer to the crtc that is currently using this AUX channel
* @hw_mutex: internal mutex used for locking transfers
* @crc_work: worker that captures CRCs for each frame
* @crc_count: counter of captured frame CRCs
* @transfer: transfers a message representing a single AUX transaction
*
* The .dev field should be set to a pointer to the device that implements
* the AUX channel.
*
* The .name field may be used to specify the name of the I2C adapter. If set to
* NULL, dev_name() of .dev will be used.
*
* Drivers provide a hardware-specific implementation of how transactions
* are executed via the .transfer() function. A pointer to a drm_dp_aux_msg
* structure describing the transaction is passed into this function. Upon
* success, the implementation should return the number of payload bytes
* that were transferred, or a negative error-code on failure. Helpers
* propagate errors from the .transfer() function, with the exception of
* the -EBUSY error, which causes a transaction to be retried. On a short,
* helpers will return -EPROTO to make it simpler to check for failure.
*
* An AUX channel can also be used to transport I2C messages to a sink. A
* typical application of that is to access an EDID that's present in the
* sink device. The .transfer() function can also be used to execute such
* transactions. The drm_dp_aux_register() function registers an I2C
* adapter that can be passed to drm_probe_ddc(). Upon removal, drivers
* should call drm_dp_aux_unregister() to remove the I2C adapter.
* The I2C adapter uses long transfers by default; if a partial response is
* received, the adapter will drop down to the size given by the partial
* response for this transaction only.
*
* Note that the aux helper code assumes that the .transfer() function
* only modifies the reply field of the drm_dp_aux_msg structure. The
* retry logic and i2c helpers assume this is the case.
*/
struct drm_dp_aux {
const char *name;
struct i2c_adapter ddc;
struct device *dev;
struct drm_crtc *crtc;
struct mutex hw_mutex;
struct work_struct crc_work;
u8 crc_count;
ssize_t (*transfer)(struct drm_dp_aux *aux,
struct drm_dp_aux_msg *msg);
/**
* @i2c_nack_count: Counts I2C NACKs, used for DP validation.
*/
unsigned i2c_nack_count;
/**
* @i2c_defer_count: Counts I2C DEFERs, used for DP validation.
*/
unsigned i2c_defer_count;
/**
* @cec: struct containing fields used for CEC-Tunneling-over-AUX.
*/
struct drm_dp_aux_cec cec;
};
ssize_t drm_dp_dpcd_read(struct drm_dp_aux *aux, unsigned int offset,
void *buffer, size_t size);
ssize_t drm_dp_dpcd_write(struct drm_dp_aux *aux, unsigned int offset,
void *buffer, size_t size);
/**
* drm_dp_dpcd_readb() - read a single byte from the DPCD
* @aux: DisplayPort AUX channel
* @offset: address of the register to read
* @valuep: location where the value of the register will be stored
*
* Returns the number of bytes transferred (1) on success, or a negative
* error code on failure.
*/
static inline ssize_t drm_dp_dpcd_readb(struct drm_dp_aux *aux,
unsigned int offset, u8 *valuep)
{
return drm_dp_dpcd_read(aux, offset, valuep, 1);
}
/**
* drm_dp_dpcd_writeb() - write a single byte to the DPCD
* @aux: DisplayPort AUX channel
* @offset: address of the register to write
* @value: value to write to the register
*
* Returns the number of bytes transferred (1) on success, or a negative
* error code on failure.
*/
static inline ssize_t drm_dp_dpcd_writeb(struct drm_dp_aux *aux,
unsigned int offset, u8 value)
{
return drm_dp_dpcd_write(aux, offset, &value, 1);
}
int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux,
u8 status[DP_LINK_STATUS_SIZE]);
/*
* DisplayPort link
*/
#define DP_LINK_CAP_ENHANCED_FRAMING (1 << 0)
struct drm_dp_link {
unsigned char revision;
unsigned int rate;
unsigned int num_lanes;
unsigned long capabilities;
};
int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link);
int drm_dp_link_power_up(struct drm_dp_aux *aux, struct drm_dp_link *link);
int drm_dp_link_power_down(struct drm_dp_aux *aux, struct drm_dp_link *link);
int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link);
int drm_dp_downstream_max_clock(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
const u8 port_cap[4]);
int drm_dp_downstream_max_bpc(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
const u8 port_cap[4]);
int drm_dp_downstream_id(struct drm_dp_aux *aux, char id[6]);
void drm_dp_downstream_debug(struct seq_file *m, const u8 dpcd[DP_RECEIVER_CAP_SIZE],
const u8 port_cap[4], struct drm_dp_aux *aux);
void drm_dp_aux_init(struct drm_dp_aux *aux);
int drm_dp_aux_register(struct drm_dp_aux *aux);
void drm_dp_aux_unregister(struct drm_dp_aux *aux);
int drm_dp_start_crc(struct drm_dp_aux *aux, struct drm_crtc *crtc);
int drm_dp_stop_crc(struct drm_dp_aux *aux);
struct drm_dp_dpcd_ident {
u8 oui[3];
u8 device_id[6];
u8 hw_rev;
u8 sw_major_rev;
u8 sw_minor_rev;
} __packed;
/**
* struct drm_dp_desc - DP branch/sink device descriptor
* @ident: DP device identification from DPCD 0x400 (sink) or 0x500 (branch).
* @quirks: Quirks; use drm_dp_has_quirk() to query for the quirks.
*/
struct drm_dp_desc {
struct drm_dp_dpcd_ident ident;
u32 quirks;
};
int drm_dp_read_desc(struct drm_dp_aux *aux, struct drm_dp_desc *desc,
bool is_branch);
/**
* enum drm_dp_quirk - Display Port sink/branch device specific quirks
*
* Display Port sink and branch devices in the wild have a variety of bugs, try
* to collect them here. The quirks are shared, but it's up to the drivers to
* implement workarounds for them.
*/
enum drm_dp_quirk {
/**
* @DP_DPCD_QUIRK_CONSTANT_N:
*
* The device requires main link attributes Mvid and Nvid to be limited
* to 16 bits. So will give a constant value (0x8000) for compatability.
*/
DP_DPCD_QUIRK_CONSTANT_N,
};
/**
* drm_dp_has_quirk() - does the DP device have a specific quirk
* @desc: Device decriptor filled by drm_dp_read_desc()
* @quirk: Quirk to query for
*
* Return true if DP device identified by @desc has @quirk.
*/
static inline bool
drm_dp_has_quirk(const struct drm_dp_desc *desc, enum drm_dp_quirk quirk)
{
return desc->quirks & BIT(quirk);
}
#ifdef CONFIG_DRM_DP_CEC
void drm_dp_cec_irq(struct drm_dp_aux *aux);
void drm_dp_cec_register_connector(struct drm_dp_aux *aux, const char *name,
struct device *parent);
void drm_dp_cec_unregister_connector(struct drm_dp_aux *aux);
void drm_dp_cec_set_edid(struct drm_dp_aux *aux, const struct edid *edid);
void drm_dp_cec_unset_edid(struct drm_dp_aux *aux);
#else
static inline void drm_dp_cec_irq(struct drm_dp_aux *aux)
{
}
static inline void drm_dp_cec_register_connector(struct drm_dp_aux *aux,
const char *name,
struct device *parent)
{
}
static inline void drm_dp_cec_unregister_connector(struct drm_dp_aux *aux)
{
}
static inline void drm_dp_cec_set_edid(struct drm_dp_aux *aux,
const struct edid *edid)
{
}
static inline void drm_dp_cec_unset_edid(struct drm_dp_aux *aux)
{
}
#endif
#endif /* _DRM_DP_HELPER_H_ */
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