| /* |
| * 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_STATUS 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_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_NO_AUX_HANDSHAKE_LINK_TRAINING (1 << 6) |
| |
| #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_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_PSR_SUPPORT 0x070 /* XXX 1.2? */ |
| # define DP_PSR_IS_SUPPORTED 1 |
| # define DP_PSR2_IS_SUPPORTED 2 /* eDP 1.4 */ |
| |
| #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 |
| |
| /* |
| * 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_HPD (1 << 3) |
| /* offset 1 for VGA is maximum megapixels per second / 8 */ |
| /* offset 2 */ |
| # define DP_DS_VGA_MAX_BPC_MASK (3 << 0) |
| # define DP_DS_VGA_8BPC 0 |
| # define DP_DS_VGA_10BPC 1 |
| # define DP_DS_VGA_12BPC 2 |
| # define DP_DS_VGA_16BPC 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_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_MASK 0x3 |
| |
| /* 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_AUX_FRAME_SYNC_VALUE 0x15c /* eDP 1.4 */ |
| # define DP_AUX_FRAME_SYNC_VALID (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_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_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_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_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_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_SET_POWER 0x600 |
| # define DP_SET_POWER_D0 0x1 |
| # define DP_SET_POWER_D3 0x2 |
| # define DP_SET_POWER_MASK 0x3 |
| |
| #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_GENERAL_CAP_1 0x701 |
| |
| #define DP_EDP_BACKLIGHT_ADJUSTMENT_CAP 0x702 |
| |
| #define DP_EDP_GENERAL_CAP_2 0x703 |
| |
| #define DP_EDP_GENERAL_CAP_3 0x704 /* eDP 1.4 */ |
| |
| #define DP_EDP_DISPLAY_CONTROL_REGISTER 0x720 |
| |
| #define DP_EDP_BACKLIGHT_MODE_SET_REGISTER 0x721 |
| |
| #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_BACKLIGHT_CONTROL_STATUS 0x727 |
| |
| #define DP_EDP_BACKLIGHT_FREQ_SET 0x728 |
| |
| #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_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_RECEIVER_ALPM_STATUS 0x200b /* eDP 1.4 */ |
| # define DP_ALPM_LOCK_TIMEOUT_ERROR (1 << 0) |
| |
| /* 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 |
| |
| #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 EDP_PSR_RECEIVER_CAP_SIZE 2 |
| |
| 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); |
| |
| struct edp_sdp_header { |
| u8 HB0; /* Secondary Data Packet ID */ |
| u8 HB1; /* Secondary Data Packet Type */ |
| u8 HB2; /* 7:5 reserved, 4:0 revision number */ |
| u8 HB3; /* 7:5 reserved, 4:0 number of valid data bytes */ |
| } __packed; |
| |
| #define EDP_SDP_HEADER_REVISION_MASK 0x1F |
| #define EDP_SDP_HEADER_VALID_PAYLOAD_BYTES 0x1F |
| |
| struct edp_vsc_psr { |
| struct edp_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) |
| |
| 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); |
| } |
| |
| /* |
| * 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 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 |
| * @hw_mutex: internal mutex used for locking transfers |
| * @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 mutex hw_mutex; |
| ssize_t (*transfer)(struct drm_dp_aux *aux, |
| struct drm_dp_aux_msg *msg); |
| unsigned i2c_nack_count, i2c_defer_count; |
| }; |
| |
| 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_aux_register(struct drm_dp_aux *aux); |
| void drm_dp_aux_unregister(struct drm_dp_aux *aux); |
| |
| #endif /* _DRM_DP_HELPER_H_ */ |