Add a driver for the TX side of the Xilinx LogiCore DisplayPort IP core.
Signed-off-by: Mario Six <mario....@gdsys.cc>
---
drivers/transmitter/Kconfig | 6 +
drivers/transmitter/Makefile | 1 +
drivers/transmitter/logicore_dp_dpcd.h | 342 +++++
drivers/transmitter/logicore_dp_tx.c | 1984 ++++++++++++++++++++++++++++
drivers/transmitter/logicore_dp_tx.h | 40 +
drivers/transmitter/logicore_dp_tx_regif.h | 365 +++++
6 files changed, 2738 insertions(+)
create mode 100644 drivers/transmitter/logicore_dp_dpcd.h
create mode 100644 drivers/transmitter/logicore_dp_tx.c
create mode 100644 drivers/transmitter/logicore_dp_tx.h
create mode 100644 drivers/transmitter/logicore_dp_tx_regif.h
diff --git a/drivers/transmitter/Kconfig b/drivers/transmitter/Kconfig
index 64ca08f8b8..e5613586a3 100644
--- a/drivers/transmitter/Kconfig
+++ b/drivers/transmitter/Kconfig
@@ -13,4 +13,10 @@ config SANDBOX_TRANSMITTER
help
Enable the dummy transmitter for the sandbox.
+config LOGICORE_DP_TX
+ bool "Enable Logicore DP TX driver"
+ depends on DM
+ help
+ Enabled the driver for the Logicore DP TX display port transmitter.
+
endif
diff --git a/drivers/transmitter/Makefile b/drivers/transmitter/Makefile
index b873e63e28..088922d992 100644
--- a/drivers/transmitter/Makefile
+++ b/drivers/transmitter/Makefile
@@ -7,3 +7,4 @@
obj-y += transmitter-uclass.o
obj-$(CONFIG_SANDBOX_TRANSMITTER) += sandbox_transmitter.o
+obj-$(CONFIG_LOGICORE_DP_TX) += logicore_dp_tx.o
diff --git a/drivers/transmitter/logicore_dp_dpcd.h
b/drivers/transmitter/logicore_dp_dpcd.h
new file mode 100644
index 0000000000..6858294551
--- /dev/null
+++ b/drivers/transmitter/logicore_dp_dpcd.h
@@ -0,0 +1,342 @@
+/*
+ * logicore_dp_dpcd.h
+ *
+ * DPCD interface definition for XILINX LogiCore DisplayPort v6.1
+ * based on Xilinx dp_v3_1 driver sources
+ *
+ * (C) Copyright 2016
+ * Dirk Eibach, Guntermann & Drunck GmbH, dirk.eib...@gdsys.cc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __GDSYS_LOGICORE_DP_DPCD_H__
+#define __GDSYS_LOGICORE_DP_DPCD_H__
+
+/* receiver capability field */
+#define DPCD_REV 0x00000
+#define DPCD_MAX_LINK_RATE 0x00001
+#define DPCD_MAX_LANE_COUNT 0x00002
+#define DPCD_MAX_DOWNSPREAD 0x00003
+#define DPCD_NORP_PWR_V_CAP 0x00004
+#define DPCD_DOWNSP_PRESENT 0x00005
+#define DPCD_ML_CH_CODING_CAP 0x00006
+#define DPCD_DOWNSP_COUNT_MSA_OUI 0x00007
+#define DPCD_RX_PORT0_CAP_0 0x00008
+#define DPCD_RX_PORT0_CAP_1 0x00009
+#define DPCD_RX_PORT1_CAP_0 0x0000A
+#define DPCD_RX_PORT1_CAP_1 0x0000B
+#define DPCD_I2C_SPEED_CTL_CAP 0x0000C
+#define DPCD_EDP_CFG_CAP 0x0000D
+#define DPCD_TRAIN_AUX_RD_INTERVAL 0x0000E
+#define DPCD_ADAPTER_CAP 0x0000F
+#define DPCD_FAUX_CAP 0x00020
+#define DPCD_MSTM_CAP 0x00021
+#define DPCD_NUM_AUDIO_EPS 0x00022
+#define DPCD_AV_GRANULARITY 0x00023
+#define DPCD_AUD_DEC_LAT_7_0 0x00024
+#define DPCD_AUD_DEC_LAT_15_8 0x00025
+#define DPCD_AUD_PP_LAT_7_0 0x00026
+#define DPCD_AUD_PP_LAT_15_8 0x00027
+#define DPCD_VID_INTER_LAT 0x00028
+#define DPCD_VID_PROG_LAT 0x00029
+#define DPCD_REP_LAT 0x0002A
+#define DPCD_AUD_DEL_INS_7_0 0x0002B
+#define DPCD_AUD_DEL_INS_15_8 0x0002C
+#define DPCD_AUD_DEL_INS_23_16 0x0002D
+#define DPCD_GUID 0x00030
+#define DPCD_RX_GTC_VALUE_7_0 0x00054
+#define DPCD_RX_GTC_VALUE_15_8 0x00055
+#define DPCD_RX_GTC_VALUE_23_16 0x00056
+#define DPCD_RX_GTC_VALUE_31_24 0x00057
+#define DPCD_RX_GTC_MSTR_REQ 0x00058
+#define DPCD_RX_GTC_FREQ_LOCK_DONE 0x00059
+#define DPCD_DOWNSP_0_CAP 0x00080
+#define DPCD_DOWNSP_1_CAP 0x00081
+#define DPCD_DOWNSP_2_CAP 0x00082
+#define DPCD_DOWNSP_3_CAP 0x00083
+#define DPCD_DOWNSP_0_DET_CAP 0x00080
+#define DPCD_DOWNSP_1_DET_CAP 0x00084
+#define DPCD_DOWNSP_2_DET_CAP 0x00088
+#define DPCD_DOWNSP_3_DET_CAP 0x0008C
+
+/* link configuration field */
+#define DPCD_LINK_BW_SET 0x00100
+#define DPCD_LANE_COUNT_SET 0x00101
+#define DPCD_TP_SET 0x00102
+#define DPCD_TRAINING_LANE0_SET 0x00103
+#define DPCD_TRAINING_LANE1_SET 0x00104
+#define DPCD_TRAINING_LANE2_SET 0x00105
+#define DPCD_TRAINING_LANE3_SET 0x00106
+#define DPCD_DOWNSPREAD_CTRL 0x00107
+#define DPCD_ML_CH_CODING_SET 0x00108
+#define DPCD_I2C_SPEED_CTL_SET 0x00109
+#define DPCD_EDP_CFG_SET 0x0010A
+#define DPCD_LINK_QUAL_LANE0_SET 0x0010B
+#define DPCD_LINK_QUAL_LANE1_SET 0x0010C
+#define DPCD_LINK_QUAL_LANE2_SET 0x0010D
+#define DPCD_LINK_QUAL_LANE3_SET 0x0010E
+#define DPCD_TRAINING_LANE0_1_SET2 0x0010F
+#define DPCD_TRAINING_LANE2_3_SET2 0x00110
+#define DPCD_MSTM_CTRL 0x00111
+#define DPCD_AUDIO_DELAY_7_0 0x00112
+#define DPCD_AUDIO_DELAY_15_8 0x00113
+#define DPCD_AUDIO_DELAY_23_6 0x00114
+#define DPCD_UPSTREAM_DEVICE_DP_PWR_NEED 0x00118
+#define DPCD_FAUX_MODE_CTRL 0x00120
+#define DPCD_FAUX_FORWARD_CH_DRIVE_SET 0x00121
+#define DPCD_BACK_CH_STATUS 0x00122
+#define DPCD_FAUX_BACK_CH_SYMBOL_ERROR_COUNT 0x00123
+#define DPCD_FAUX_BACK_CH_TRAINING_PATTERN_TIME 0x00125
+#define DPCD_TX_GTC_VALUE_7_0 0x00154
+#define DPCD_TX_GTC_VALUE_15_8 0x00155
+#define DPCD_TX_GTC_VALUE_23_16 0x00156
+#define DPCD_TX_GTC_VALUE_31_24 0x00157
+#define DPCD_RX_GTC_VALUE_PHASE_SKEW_EN 0x00158
+#define DPCD_TX_GTC_FREQ_LOCK_DONE 0x00159
+#define DPCD_ADAPTER_CTRL 0x001A0
+#define DPCD_BRANCH_DEVICE_CTRL 0x001A1
+#define DPCD_PAYLOAD_ALLOCATE_SET 0x001C0
+#define DPCD_PAYLOAD_ALLOCATE_START_TIME_SLOT 0x001C1
+#define DPCD_PAYLOAD_ALLOCATE_TIME_SLOT_COUNT 0x001C2
+
+/* link/sink status field */
+#define DPCD_SINK_COUNT 0x00200
+#define DPCD_DEVICE_SERVICE_IRQ 0x00201
+#define DPCD_STATUS_LANE_0_1 0x00202
+#define DPCD_STATUS_LANE_2_3 0x00203
+#define DPCD_LANE_ALIGN_STATUS_UPDATED 0x00204
+#define DPCD_SINK_STATUS 0x00205
+#define DPCD_ADJ_REQ_LANE_0_1 0x00206
+#define DPCD_ADJ_REQ_LANE_2_3 0x00207
+#define DPCD_TRAINING_SCORE_LANE_0 0x00208
+#define DPCD_TRAINING_SCORE_LANE_1 0x00209
+#define DPCD_TRAINING_SCORE_LANE_2 0x0020A
+#define DPCD_TRAINING_SCORE_LANE_3 0x0020B
+#define DPCD_ADJ_REQ_PC2 0x0020C
+#define DPCD_FAUX_FORWARD_CH_SYMBOL_ERROR_COUNT 0x0020D
+#define DPCD_SYMBOL_ERROR_COUNT_LANE_0 0x00210
+#define DPCD_SYMBOL_ERROR_COUNT_LANE_1 0x00212
+#define DPCD_SYMBOL_ERROR_COUNT_LANE_2 0x00214
+#define DPCD_SYMBOL_ERROR_COUNT_LANE_3 0x00216
+
+/* automated testing sub-field */
+#define DPCD_FAUX_FORWARD_CH_STATUS 0x00280
+#define DPCD_FAUX_BACK_CH_DRIVE_SET 0x00281
+#define DPCD_FAUX_BACK_CH_SYM_ERR_COUNT_CTRL 0x00282
+#define DPCD_PAYLOAD_TABLE_UPDATE_STATUS 0x002C0
+#define DPCD_VC_PAYLOAD_ID_SLOT(SlotNum) \
+ (DPCD_PAYLOAD_TABLE_UPDATE_STATUS + SlotNum)
+
+/* sink control field */
+#define DPCD_SET_POWER_DP_PWR_VOLTAGE 0x00600
+
+/* sideband message buffers */
+#define DPCD_DOWN_REQ 0x01000
+#define DPCD_UP_REP 0x01200
+#define DPCD_DOWN_REP 0x01400
+#define DPCD_UP_REQ 0x01600
+
+/* event status indicator field */
+#define DPCD_SINK_COUNT_ESI 0x02002
+#define DPCD_SINK_DEVICE_SERVICE_IRQ_VECTOR_ESI0 0x02003
+#define DPCD_SINK_DEVICE_SERVICE_IRQ_VECTOR_ESI1 0x02004
+#define DPCD_SINK_LINK_SERVICE_IRQ_VECTOR_ESI0 0x02005
+#define DPCD_SINK_LANE0_1_STATUS 0x0200C
+#define DPCD_SINK_LANE2_3_STATUS 0x0200D
+#define DPCD_SINK_ALIGN_STATUS_UPDATED_ESI 0x0200E
+#define DPCD_SINK_STATUS_ESI 0x0200F
+
+/*
+ * field addresses and sizes.
+ */
+#define DPCD_RECEIVER_CAP_FIELD_START DPCD_REV
+#define DPCD_RECEIVER_CAP_FIELD_SIZE 0x100
+#define DPCD_LINK_CFG_FIELD_START DPCD_LINK_BW_SET
+#define DPCD_LINK_CFG_FIELD_SIZE 0x100
+#define DPCD_LINK_SINK_STATUS_FIELD_START DPCD_SINK_COUNT
+#define DPCD_LINK_SINK_STATUS_FIELD_SIZE 0x17
+/* 0x00000: DPCD_REV */
+#define DPCD_REV_MNR_MASK 0x0F
+#define DPCD_REV_MJR_MASK 0xF0
+#define DPCD_REV_MJR_SHIFT 4
+/* 0x00001: MAX_LINK_RATE */
+#define DPCD_MAX_LINK_RATE_162GBPS 0x06
+#define DPCD_MAX_LINK_RATE_270GBPS 0x0A
+#define DPCD_MAX_LINK_RATE_540GBPS 0x14
+/* 0x00002: MAX_LANE_COUNT */
+#define DPCD_MAX_LANE_COUNT_MASK 0x1F
+#define DPCD_MAX_LANE_COUNT_1 0x01
+#define DPCD_MAX_LANE_COUNT_2 0x02
+#define DPCD_MAX_LANE_COUNT_4 0x04
+#define DPCD_TPS3_SUPPORT_MASK 0x40
+#define DPCD_ENHANCED_FRAME_SUPPORT_MASK 0x80
+/* 0x00003: MAX_DOWNSPREAD */
+#define DPCD_MAX_DOWNSPREAD_MASK 0x01
+#define DPCD_NO_AUX_HANDSHAKE_LINK_TRAIN_MASK 0x40
+/* 0x00005: DOWNSP_PRESENT */
+#define DPCD_DOWNSP_PRESENT_MASK 0x01
+#define DPCD_DOWNSP_TYPE_MASK 0x06
+#define DPCD_DOWNSP_TYPE_SHIFT 1
+#define DPCD_DOWNSP_TYPE_DP 0x0
+#define DPCD_DOWNSP_TYPE_AVGA_ADVII 0x1
+#define DPCD_DOWNSP_TYPE_DVI_HDMI_DPPP 0x2
+#define DPCD_DOWNSP_TYPE_OTHERS 0x3
+#define DPCD_DOWNSP_FORMAT_CONV_MASK 0x08
+#define DPCD_DOWNSP_DCAP_INFO_AVAIL_MASK 0x10
+/* 0x00006, 0x00108: ML_CH_CODING_SUPPORT, ML_CH_CODING_SET */
+#define DPCD_ML_CH_CODING_MASK 0x01
+/* 0x00007: DOWNSP_COUNT_MSA_OUI */
+#define DPCD_DOWNSP_COUNT_MASK 0x0F
+#define DPCD_MSA_TIMING_PAR_IGNORED_MASK 0x40
+#define DPCD_OUI_SUPPORT_MASK 0x80
+/* 0x00008, 0x0000A: RX_PORT[0-1]_CAP_0 */
+#define DPCD_RX_PORTX_CAP_0_LOCAL_EDID_PRESENT_MASK 0x02
+#define DPCD_RX_PORTX_CAP_0_ASSOC_TO_PRECEDING_PORT_MASK 0x04
+/* 0x0000C, 0x00109: I2C_SPEED_CTL_CAP, I2C_SPEED_CTL_SET */
+#define DPCD_I2C_SPEED_CTL_NONE 0x00
+#define DPCD_I2C_SPEED_CTL_1KBIPS 0x01
+#define DPCD_I2C_SPEED_CTL_5KBIPS 0x02
+#define DPCD_I2C_SPEED_CTL_10KBIPS 0x04
+#define DPCD_I2C_SPEED_CTL_100KBIPS 0x08
+#define DPCD_I2C_SPEED_CTL_400KBIPS 0x10
+#define DPCD_I2C_SPEED_CTL_1MBIPS 0x20
+/* 0x0000E: TRAIN_AUX_RD_INTERVAL */
+#define DPCD_TRAIN_AUX_RD_INT_100_400US 0x00
+#define DPCD_TRAIN_AUX_RD_INT_4MS 0x01
+#define DPCD_TRAIN_AUX_RD_INT_8MS 0x02
+#define DPCD_TRAIN_AUX_RD_INT_12MS 0x03
+#define DPCD_TRAIN_AUX_RD_INT_16MS 0x04
+/* 0x00020: DPCD_FAUX_CAP */
+#define DPCD_FAUX_CAP_MASK 0x01
+/* 0x00021: MSTM_CAP */
+#define DPCD_MST_CAP_MASK 0x01
+/* 0x00080, 0x00081|4, 0x00082|8, 0x00083|C: DOWNSP_X_(DET_)CAP */
+#define DPCD_DOWNSP_X_CAP_TYPE_MASK 0x07
+#define DPCD_DOWNSP_X_CAP_TYPE_DP 0x0
+#define DPCD_DOWNSP_X_CAP_TYPE_AVGA 0x1
+#define DPCD_DOWNSP_X_CAP_TYPE_DVI 0x2
+#define DPCD_DOWNSP_X_CAP_TYPE_HDMI 0x3
+#define DPCD_DOWNSP_X_CAP_TYPE_OTHERS 0x4
+#define DPCD_DOWNSP_X_CAP_TYPE_DPPP 0x5
+#define DPCD_DOWNSP_X_CAP_HPD_MASK 0x80
+#define DPCD_DOWNSP_X_CAP_NON_EDID_ATTR_MASK 0xF0
+#define DPCD_DOWNSP_X_CAP_NON_EDID_ATTR_SHIFT 4
+#define DPCD_DOWNSP_X_CAP_NON_EDID_ATTR_720_480_I_60 0x1
+#define DPCD_DOWNSP_X_CAP_NON_EDID_ATTR_720_480_I_50 0x2
+#define DPCD_DOWNSP_X_CAP_NON_EDID_ATTR_1920_1080_I_60 0x3
+#define DPCD_DOWNSP_X_CAP_NON_EDID_ATTR_1920_1080_I_50 0x4
+#define DPCD_DOWNSP_X_CAP_NON_EDID_ATTR_1280_720_P_60 0x5
+#define DPCD_DOWNSP_X_CAP_NON_EDID_ATTR_1280_720_P_50 0x7
+/* 0x00082, 0x00086, 0x0008A, 0x0008E: DOWNSP_X_(DET_)CAP2 */
+#define DPCD_DOWNSP_X_DCAP_MAX_BPC_MASK 0x03
+#define DPCD_DOWNSP_X_DCAP_MAX_BPC_8 0x0
+#define DPCD_DOWNSP_X_DCAP_MAX_BPC_10 0x1
+#define DPCD_DOWNSP_X_DCAP_MAX_BPC_12 0x2
+#define DPCD_DOWNSP_X_DCAP_MAX_BPC_16 0x3
+/* 0x00082, 0x00086, 0x0008A, 0x0008E: DOWNSP_X_(DET_)CAP2 */
+#define DPCD_DOWNSP_X_DCAP_HDMI_DPPP_FS2FP_MASK 0x01
+#define DPCD_DOWNSP_X_DCAP_DVI_DL_MASK 0x02
+#define DPCD_DOWNSP_X_DCAP_DVI_HCD_MASK 0x04
+
+/* link configuration field masks, shifts, and register values */
+/* 0x00100: DPCD_LINK_BW_SET */
+#define DPCD_LINK_BW_SET_162GBPS 0x06
+#define DPCD_LINK_BW_SET_270GBPS 0x0A
+#define DPCD_LINK_BW_SET_540GBPS 0x14
+/* 0x00101: LANE_COUNT_SET */
+#define DPCD_LANE_COUNT_SET_MASK 0x1F
+#define DPCD_LANE_COUNT_SET_1 0x01
+#define DPCD_LANE_COUNT_SET_2 0x02
+#define DPCD_LANE_COUNT_SET_4 0x04
+#define DPCD_ENHANCED_FRAME_EN_MASK 0x80
+/* 0x00102: TP_SET */
+#define DPCD_TP_SEL_MASK 0x03
+#define DPCD_TP_SEL_OFF 0x0
+#define DPCD_TP_SEL_TP1 0x1
+#define DPCD_TP_SEL_TP2 0x2
+#define DPCD_TP_SEL_TP3 0x3
+#define DPCD_TP_SET_LQP_MASK 0x06
+#define DPCD_TP_SET_LQP_SHIFT 2
+#define DPCD_TP_SET_LQP_OFF 0x0
+#define DPCD_TP_SET_LQP_D102_TEST 0x1
+#define DPCD_TP_SET_LQP_SER_MES 0x2
+#define DPCD_TP_SET_LQP_PRBS7 0x3
+#define DPCD_TP_SET_REC_CLK_OUT_EN_MASK 0x10
+#define DPCD_TP_SET_SCRAMB_DIS_MASK 0x20
+#define DPCD_TP_SET_SE_COUNT_SEL_MASK 0xC0
+#define DPCD_TP_SET_SE_COUNT_SEL_SHIFT 6
+#define DPCD_TP_SET_SE_COUNT_SEL_DE_ISE 0x0
+#define DPCD_TP_SET_SE_COUNT_SEL_DE 0x1
+#define DPCD_TP_SET_SE_COUNT_SEL_ISE 0x2
+/* 0x00103-0x00106: TRAINING_LANE[0-3]_SET */
+#define DPCD_TRAINING_LANEX_SET_VS_MASK 0x03
+#define DPCD_TRAINING_LANEX_SET_MAX_VS_MASK 0x04
+#define DPCD_TRAINING_LANEX_SET_PE_MASK 0x18
+#define DPCD_TRAINING_LANEX_SET_PE_SHIFT 3
+#define DPCD_TRAINING_LANEX_SET_MAX_PE_MASK 0x20
+/* 0x00107: DOWNSPREAD_CTRL */
+#define DPCD_SPREAD_AMP_MASK 0x10
+#define DPCD_MSA_TIMING_PAR_IGNORED_EN_MASK 0x80
+/* 0x00108: ML_CH_CODING_SET - Same as 0x00006: ML_CH_CODING_SUPPORT */
+/* 0x00109: I2C_SPEED_CTL_SET - Same as 0x0000C: I2C_SPEED_CTL_CAP */
+/* 0x0010F-0x00110: TRAINING_LANE[0_1-2_3]_SET2 */
+#define DPCD_TRAINING_LANE_0_2_SET_PC2_MASK 0x03
+#define DPCD_TRAINING_LANE_0_2_SET_MAX_PC2_MASK 0x04
+#define DPCD_TRAINING_LANE_1_3_SET_PC2_MASK 0x30
+#define DPCD_TRAINING_LANE_1_3_SET_PC2_SHIFT 4
+#define DPCD_TRAINING_LANE_1_3_SET_MAX_PC2_MASK 0x40
+/* 0x00111: MSTM_CTRL */
+#define DPCD_MST_EN_MASK 0x01
+#define DPCD_UP_REQ_EN_MASK 0x02
+#define DPCD_UP_IS_SRC_MASK 0x03
+
+/* link/sink status field masks, shifts, and register values */
+/* 0x00200: SINK_COUNT */
+#define DPCD_SINK_COUNT_LOW_MASK 0x3F
+#define DPCD_SINK_CP_READY_MASK 0x40
+#define DPCD_SINK_COUNT_HIGH_MASK 0x80
+#define DPCD_SINK_COUNT_HIGH_LOW_SHIFT 1
+/* 0x00202: STATUS_LANE_0_1 */
+#define DPCD_STATUS_LANE_0_CR_DONE_MASK 0x01
+#define DPCD_STATUS_LANE_0_CE_DONE_MASK 0x02
+#define DPCD_STATUS_LANE_0_SL_DONE_MASK 0x04
+#define DPCD_STATUS_LANE_1_CR_DONE_MASK 0x10
+#define DPCD_STATUS_LANE_1_CE_DONE_MASK 0x20
+#define DPCD_STATUS_LANE_1_SL_DONE_MASK 0x40
+/* 0x00202: STATUS_LANE_2_3 */
+#define DPCD_STATUS_LANE_2_CR_DONE_MASK 0x01
+#define DPCD_STATUS_LANE_2_CE_DONE_MASK 0x02
+#define DPCD_STATUS_LANE_2_SL_DONE_MASK 0x04
+#define DPCD_STATUS_LANE_3_CR_DONE_MASK 0x10
+#define DPCD_STATUS_LANE_3_CE_DONE_MASK 0x20
+#define DPCD_STATUS_LANE_3_SL_DONE_MASK 0x40
+/* 0x00204: LANE_ALIGN_STATUS_UPDATED */
+#define DPCD_LANE_ALIGN_STATUS_UPDATED_IA_DONE_MASK \
+ 0x01
+#define DPCD_LANE_ALIGN_STATUS_UPDATED_DOWNSP_STATUS_CHANGED_MASK \
+ 0x40
+#define DPCD_LANE_ALIGN_STATUS_UPDATED_LINK_STATUS_UPDATED_MASK \
+ 0x80
+/* 0x00205: SINK_STATUS */
+#define DPCD_SINK_STATUS_RX_PORT0_SYNC_STATUS_MASK 0x01
+#define DPCD_SINK_STATUS_RX_PORT1_SYNC_STATUS_MASK 0x02
+
+/* 0x00206, 0x00207: ADJ_REQ_LANE_[0,2]_[1,3] */
+#define DPCD_ADJ_REQ_LANE_0_2_VS_MASK 0x03
+#define DPCD_ADJ_REQ_LANE_0_2_PE_MASK 0x0C
+#define DPCD_ADJ_REQ_LANE_0_2_PE_SHIFT 2
+#define DPCD_ADJ_REQ_LANE_1_3_VS_MASK 0x30
+#define DPCD_ADJ_REQ_LANE_1_3_VS_SHIFT 4
+#define DPCD_ADJ_REQ_LANE_1_3_PE_MASK 0xC0
+#define DPCD_ADJ_REQ_LANE_1_3_PE_SHIFT 6
+/* 0x0020C: ADJ_REQ_PC2 */
+#define DPCD_ADJ_REQ_PC2_LANE_0_MASK 0x03
+#define DPCD_ADJ_REQ_PC2_LANE_1_MASK 0x0C
+#define DPCD_ADJ_REQ_PC2_LANE_1_SHIFT 2
+#define DPCD_ADJ_REQ_PC2_LANE_2_MASK 0x30
+#define DPCD_ADJ_REQ_PC2_LANE_2_SHIFT 4
+#define DPCD_ADJ_REQ_PC2_LANE_3_MASK 0xC0
+#define DPCD_ADJ_REQ_PC2_LANE_3_SHIFT 6
+
+#endif /* __GDSYS_LOGICORE_DP_DPCD_H__ */
diff --git a/drivers/transmitter/logicore_dp_tx.c
b/drivers/transmitter/logicore_dp_tx.c
new file mode 100644
index 0000000000..b61159cd89
--- /dev/null
+++ b/drivers/transmitter/logicore_dp_tx.c
@@ -0,0 +1,1984 @@
+/*
+ * logicore_dp_tx.c
+ *
+ * Driver for XILINX LogiCore DisplayPort v6.1 TX (Source)
+ * based on Xilinx dp_v3_1 driver sources, updated to dp_v4_0
+ *
+ * (C) Copyright 2016
+ * Dirk Eibach, Guntermann & Drunck GmbH, dirk.eib...@gdsys.cc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <dm.h>
+#include <errno.h>
+#include <transmitter.h>
+
+#include "ihs_axi.h"
+
+#include "logicore_dp_dpcd.h"
+#include "logicore_dp_tx_regif.h"
+#include "logicore_dp_tx.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define S_AXI_CLK_DEFAULT 100000000
+
+#define PHY_CLOCK_SELECT_DEFAULT PHY_CLOCK_SELECT_540GBPS
+
+/* The maximum voltage swing level is 3. */
+#define MAXIMUM_VS_LEVEL 3
+/* The maximum pre-emphasis level is 3. */
+#define MAXIMUM_PE_LEVEL 3
+
+/* Error out if an AUX request yields a defer reply more than 50 times. */
+#define AUX_MAX_DEFER_COUNT 50
+/* Error out if an AUX request times out more than 50 times awaiting a reply.
*/
+#define AUX_MAX_TIMEOUT_COUNT 50
+/* Error out if checking for a connected device times out more than 50 times.
*/
+#define IS_CONNECTED_MAX_TIMEOUT_COUNT 50
+
+enum {
+ TS_CLOCK_RECOVERY,
+ TS_CHANNEL_EQUALIZATION,
+ TS_ADJUST_LINK_RATE,
+ TS_ADJUST_LANE_COUNT,
+ TS_FAILURE,
+ TS_SUCCESS
+};
+
+struct aux_transaction {
+ u16 cmd_code;
+ u8 num_bytes;
+ u32 address;
+ u8 *data;
+};
+
+/*
+ * all porch parameters have been removed because our videodata is
hstart/vstart
+ * based and there is no benefit in keeping the porches
+ */
+
+struct main_stream_attributes {
+ /* Pixel clock of the stream (in Hz). */
+ u32 pixel_clock_hz;
+ /* Miscellaneous stream attributes 0 as specified by the DisplayPort
+ * 1.2 specification.
+ */
+ u32 misc_0;
+ /* Miscellaneous stream attributes 1 as specified by the DisplayPort
+ * 1.2 specification.
+ */
+ u32 misc_1;
+ /* N value for the video stream. */
+ u32 n_vid;
+ /* M value used to recover the video clock from the link clock. */
+ u32 m_vid;
+ /* Width of the user data input port. */
+ u32 user_pixel_width;
+ /* Used to translate the number of pixels per line to the native
+ * internal 16-bit datapath.
+ */
+ u32 data_per_lane;
+ /* Average number of bytes per transfer unit, scaled up by a factor of
+ * 1000.
+ */
+ u32 avg_bytes_per_tu;
+ /* Size of the transfer unit in the framing logic. In MST mode, this is
+ * also the number of time slots that are alloted in the payload ID
+ * table.
+ */
+ u32 transfer_unit_size;
+ /* Number of initial wait cycles at the start of a new line by the
+ * framing logic.
+ */
+ u32 init_wait;
+ /* Bits per color component. */
+ u32 bits_per_color;
+ /* The component format currently in use by the video stream. */
+ u8 component_format;
+ /* The dynamic range currently in use by the video stream. */
+ u8 dynamic_range;
+ /* The YCbCr colorimetry currently in use by the video stream. */
+ u8 y_cb_cr_colorimetry;
+ /* Synchronous clock mode is currently in use by the video stream. */
+ u8 synchronous_clock_mode;
+ /* If set to 1, the value stored for user_pixel_width will be used as
+ * the pixel width.
+ */
+ u8 override_user_pixel_width;
+ /* Horiz. blank start (pixels). */
+ u32 h_start;
+ /* Horiz. active resolution (pixels) */
+ u16 h_active;
+ /* Horiz. sync width (pixels) */
+ u16 h_sync_width;
+ /* Horiz. total (pixels) */
+ u16 h_total;
+ /* Horiz. sync polarity (0=neg|1=pos) */
+ bool h_sync_polarity;
+ /* Vert. blank start (in lines). */
+ u32 v_start;
+ /* Vert. active resolution (lines) */
+ u16 v_active;
+ /* Vert. sync width (lines) */
+ u16 v_sync_width;
+ /* Vert. total (lines) */
+ u16 v_total;
+ /* Vert. sync polarity (0=neg|1=pos) */
+ bool v_sync_polarity;
+};
+
+struct link_config {
+ u8 lane_count;
+ u8 link_rate;
+ bool scrambler_en;
+ bool enhanced_framing_mode;
+ bool downspread_control;
+ u8 max_lane_count;
+ u8 max_link_rate;
+ bool support_enhanced_framing_mode;
+ bool support_downspread_control;
+ u8 vs_level; /* voltage swing for each lane */
+ u8 pe_level; /* pre-emphasis/cursor level for each lane */
+ u8 pattern;
+};
+
+struct dp_tx {
+ u32 base;
+
+ u32 s_axi_clk;
+
+ bool train_adaptive;
+
+ u8 max_link_rate;
+ u8 max_lane_count;
+
+ u8 dpcd_rx_caps[16];
+
+ /* This is a raw read of the RX device's status registers. The first 4
+ * bytes correspond to the lane status associated with clock recovery,
+ * channel equalization, symbol lock, and interlane alignment. The
+ * remaining 2 bytes represent the pre-emphasis and voltage swing level
+ * adjustments requested by the RX device.
+ */
+ u8 lane_status_ajd_reqs[6];
+
+ struct link_config link_config;
+ struct main_stream_attributes main_stream_attributes;
+};
+
+/*
+ * internal API
+ */
+
+static u32 get_reg(struct udevice *dev, u32 reg)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ u32 value = 0;
+ int res;
+
+ // TODO error handling
+ res = axi_read(dev->parent, dp_tx->base + reg, &value);
+ if (res < 0)
+ printf("%s() failed; res = %d\n", __func__, res);
+
+ return value;
+}
+
+static void set_reg(struct udevice *dev, u32 reg, u32 value)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+
+ axi_write(dev->parent, dp_tx->base + reg, value);
+}
+
+/*
+ * Check if there is a connected RX device.
+ * The Xilinx original calls msleep_interruptible at least once,
+ * ignoring status.
+ */
+bool is_connected(struct udevice *dev)
+{
+ u8 retries = 0;
+
+ do {
+ int status = get_reg(dev, REG_INTERRUPT_SIG_STATE) &
+ INTERRUPT_SIG_STATE_HPD_STATE_MASK;
+ if (status)
+ return true;
+
+ udelay(1000);
+ } while (retries++ < IS_CONNECTED_MAX_TIMEOUT_COUNT);
+
+ return false;
+}
+
+/*
+ * Wait for the DisplayPort PHY to come out of reset.
+ */
+static int wait_phy_ready(struct udevice *dev, u32 mask)
+{
+ u16 timeout = 20000;
+ u32 phy_status;
+
+ /* Wait until the PHY is ready. */
+ do {
+ phy_status = get_reg(dev, REG_PHY_STATUS) & mask;
+
+ /* Protect against an infinite loop. */
+ if (!timeout--)
+ return -ETIMEDOUT;
+
+ udelay(20);
+ } while (phy_status != mask);
+
+ return 0;
+}
+
+/* AUX channel access */
+
+/*
+ * Wait until another request is no longer in progress.
+ */
+static int aux_wait_ready(struct udevice *dev)
+{
+ int status;
+ u32 timeout = 100;
+
+ /* Wait until the DisplayPort TX core is ready. */
+ do {
+ status = get_reg(dev, REG_INTERRUPT_SIG_STATE);
+
+ /* Protect against an infinite loop. */
+ if (!timeout--)
+ return -ETIMEDOUT;
+ udelay(20);
+ } while (status & REPLY_STATUS_REPLY_IN_PROGRESS_MASK);
+
+ return 0;
+}
+
+/*
+ * Wait for a reply indicating that the most recent AUX request
+ * has been received by the RX device.
+ */
+static int aux_wait_reply(struct udevice *dev)
+{
+ u32 timeout = 100;
+
+ while (timeout > 0) {
+ int status = get_reg(dev, REG_REPLY_STATUS);
+
+ /* Check for error. */
+ if (status & REPLY_STATUS_REPLY_ERROR_MASK)
+ return -ETIMEDOUT;
+
+ /* Check for a reply. */
+ if ((status & REPLY_STATUS_REPLY_RECEIVED_MASK) &&
+ !(status &
+ REPLY_STATUS_REQUEST_IN_PROGRESS_MASK) &&
+ !(status &
+ REPLY_STATUS_REPLY_IN_PROGRESS_MASK)) {
+ return 0;
+ }
+
+ timeout--;
+ udelay(20);
+ }
+
+ return -ETIMEDOUT;
+}
+
+/*
+ * Submit the supplied AUX request to the RX device over the AUX
+ * channel by writing the command, the destination address, (the write buffer
+ * for write commands), and the data size to the DisplayPort TX core.
+ */
+static int aux_request_send(struct udevice *dev,
+ struct aux_transaction *request)
+{
+ u32 timeout_count;
+ int status;
+ u8 index;
+
+ /* Ensure that any pending AUX transactions have completed. */
+ timeout_count = 0;
+ do {
+ status = get_reg(dev, REG_REPLY_STATUS);
+
+ udelay(20);
+ timeout_count++;
+ if (timeout_count >= AUX_MAX_TIMEOUT_COUNT)
+ return -ETIMEDOUT;
+ } while ((status & REPLY_STATUS_REQUEST_IN_PROGRESS_MASK) ||
+ (status & REPLY_STATUS_REPLY_IN_PROGRESS_MASK));
+
+ set_reg(dev, REG_AUX_ADDRESS, request->address);
+
+ if ((request->cmd_code == AUX_CMD_WRITE) ||
+ (request->cmd_code == AUX_CMD_I2C_WRITE) ||
+ (request->cmd_code == AUX_CMD_I2C_WRITE_MOT)) {
+ /* Feed write data into the DisplayPort TX core's write FIFO. */
+ for (index = 0; index < request->num_bytes; index++) {
+ set_reg(dev,
+ REG_AUX_WRITE_FIFO, request->data[index]);
+ }
+ }
+
+ /* Submit the command and the data size. */
+ set_reg(dev, REG_AUX_CMD,
+ ((request->cmd_code << AUX_CMD_SHIFT) |
+ ((request->num_bytes - 1) &
+ AUX_CMD_NBYTES_TRANSFER_MASK)));
+
+ /* Check for a reply from the RX device to the submitted request. */
+ status = aux_wait_reply(dev);
+ if (status)
+ /* Waiting for a reply timed out. */
+ return -ETIMEDOUT;
+
+ /* Analyze the reply. */
+ status = get_reg(dev, REG_AUX_REPLY_CODE);
+ if ((status == AUX_REPLY_CODE_DEFER) ||
+ (status == AUX_REPLY_CODE_I2C_DEFER)) {
+ /* The request was deferred. */
+ return -EAGAIN;
+ } else if ((status == AUX_REPLY_CODE_NACK) ||
+ (status == AUX_REPLY_CODE_I2C_NACK)) {
+ /* The request was not acknowledged. */
+ return -EIO;
+ }
+
+ /* The request was acknowledged. */
+
+ if ((request->cmd_code == AUX_CMD_READ) ||
+ (request->cmd_code == AUX_CMD_I2C_READ) ||
+ (request->cmd_code == AUX_CMD_I2C_READ_MOT)) {
+ /* Wait until all data has been received. */
+ timeout_count = 0;
+ do {
+ status = get_reg(dev, REG_REPLY_DATA_COUNT);
+
+ udelay(100);
+ timeout_count++;
+ if (timeout_count >= AUX_MAX_TIMEOUT_COUNT)
+ return -ETIMEDOUT;
+ } while (status != request->num_bytes);
+
+ /* Obtain the read data from the reply FIFO. */
+ for (index = 0; index < request->num_bytes; index++)
+ request->data[index] = get_reg(dev, REG_AUX_REPLY_DATA);
+ }
+
+ return 0;
+}
+
+/*
+ * Submit the supplied AUX request to the RX device over the AUX
+ * channel. If waiting for a reply times out, or if the DisplayPort TX core
+ * indicates that the request was deferred, the request is sent again (up to a
+ * maximum specified by AUX_MAX_DEFER_COUNT|AUX_MAX_TIMEOUT_COUNT).
+ */
+static int aux_request(struct udevice *dev, struct aux_transaction *request)
+{
+ u32 defer_count = 0;
+ u32 timeout_count = 0;
+
+ while ((defer_count < AUX_MAX_DEFER_COUNT) &&
+ (timeout_count < AUX_MAX_TIMEOUT_COUNT)) {
+ int status = aux_wait_ready(dev);
+
+ if (status) {
+ /* The RX device isn't ready yet. */
+ timeout_count++;
+ continue;
+ }
+
+ status = aux_request_send(dev, request);
+ if (status == -EAGAIN) {
+ /* The request was deferred. */
+ defer_count++;
+ } else if (status == -ETIMEDOUT) {
+ /* Waiting for a reply timed out. */
+ timeout_count++;
+ } else {
+ /* -EIO indicates that the request was NACK'ed,
+ * 0 indicates that the request was ACK'ed.
+ */
+ return status;
+ }
+
+ udelay(100);
+ }
+
+ /* The request was not successfully received by the RX device. */
+ return -ETIMEDOUT;
+}
+
+/*
+ * Common sequence of submitting an AUX command for
+ * AUX read, AUX write, I2C-over-AUX read, and I2C-over-AUX write transactions.
+ * If required, the reads and writes are split into multiple requests, each
+ * acting on a maximum of 16 bytes.
+ */
+static int aux_common(struct udevice *dev, u32 cmd_type, u32 address,
+ u32 num_bytes, u8 *data)
+{
+ struct aux_transaction request;
+ u32 bytes_left;
+
+ /*
+ * set the start address for AUX transactions. For I2C transactions,
+ * this is the address of the I2C bus.
+ */
+ request.address = address;
+
+ bytes_left = num_bytes;
+ while (bytes_left) {
+ int status;
+
+ request.cmd_code = cmd_type;
+
+ if ((cmd_type == AUX_CMD_READ) ||
+ (cmd_type == AUX_CMD_WRITE)) {
+ /* Increment address for normal AUX transactions. */
+ request.address = address + (num_bytes - bytes_left);
+ }
+
+ /* Increment the pointer to the supplied data buffer. */
+ request.data = &data[num_bytes - bytes_left];
+
+ request.num_bytes = (bytes_left > 16) ? 16 : bytes_left;
+ bytes_left -= request.num_bytes;
+
+ if ((cmd_type == AUX_CMD_I2C_READ) && bytes_left) {
+ /* Middle of a transaction I2C read request. Override
+ * the command code that was set to cmd_type.
+ */
+ request.cmd_code = AUX_CMD_I2C_READ_MOT;
+ } else if ((cmd_type == AUX_CMD_I2C_WRITE) && bytes_left) {
+ /* Middle of a transaction I2C write request. Override
+ * the command code that was set to cmd_type.
+ */
+ request.cmd_code = AUX_CMD_I2C_WRITE_MOT;
+ }
+
+ status = aux_request(dev, &request);
+ if (status)
+ return status;
+ }
+
+ return 0;
+}
+
+/*
+ * Issue a read request over the AUX channel that will read from
+ * the RX device's DisplayPort Configuration data (DPCD) address space. The
read
+ * message will be divided into multiple transactions which read a maximum of
16
+ * bytes each.
+ */
+static int aux_read(struct udevice *dev, u32 dpcd_address, u32 bytes_to_read,
+ void *read_data)
+{
+ int status;
+
+ if (!is_connected(dev))
+ return -ENODEV;
+
+ /* Send AUX read transaction. */
+ status = aux_common(dev, AUX_CMD_READ, dpcd_address,
+ bytes_to_read, (u8 *)read_data);
+
+ return status;
+}
+
+/*
+ * Issue a write request over the AUX channel that will write to
+ * the RX device's DisplayPort Configuration data (DPCD) address space. The
+ * write message will be divided into multiple transactions which write a
+ * maximum of 16 bytes each.
+ */
+static int aux_write(struct udevice *dev, u32 dpcd_address, u32 bytes_to_write,
+ void *write_data)
+{
+ int status;
+
+ if (!is_connected(dev))
+ return -ENODEV;
+
+ /* Send AUX write transaction. */
+ status = aux_common(dev, AUX_CMD_WRITE, dpcd_address,
+ bytes_to_write, (u8 *)write_data);
+
+ return status;
+}
+
+/* core initialization */
+
+static int initialize(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ u32 val;
+ u32 phy_config;
+ unsigned int k;
+
+ /* place the PHY (and GTTXRESET) into reset. */
+ phy_config = get_reg(dev, REG_PHY_CONFIG);
+ set_reg(dev, REG_PHY_CONFIG, phy_config | PHY_CONFIG_GT_ALL_RESET_MASK);
+
+ /* reset the video streams and AUX logic. */
+ set_reg(dev, REG_SOFT_RESET,
+ SOFT_RESET_VIDEO_STREAM_ALL_MASK |
+ SOFT_RESET_AUX_MASK);
+
+ /* disable the DisplayPort TX core. */
+ set_reg(dev, REG_ENABLE, 0);
+
+ /* set the clock divider. */
+ val = get_reg(dev, REG_AUX_CLK_DIVIDER);
+ val &= ~AUX_CLK_DIVIDER_VAL_MASK;
+ val |= dp_tx->s_axi_clk / 1000000;
+ set_reg(dev, REG_AUX_CLK_DIVIDER, val);
+
+ /* set the DisplayPort TX core's clock speed. */
+ set_reg(dev, REG_PHY_CLOCK_SELECT, PHY_CLOCK_SELECT_DEFAULT);
+
+ /* bring the PHY (and GTTXRESET) out of reset. */
+ set_reg(dev, REG_PHY_CONFIG,
+ phy_config & ~PHY_CONFIG_GT_ALL_RESET_MASK);
+
+ /* enable the DisplayPort TX core. */
+ set_reg(dev, REG_ENABLE, 1);
+
+ /* Unmask Hot-Plug-Detect (HPD) interrupts. */
+ set_reg(dev, REG_INTERRUPT_MASK,
+ ~INTERRUPT_MASK_HPD_PULSE_DETECTED_MASK &
+ ~INTERRUPT_MASK_HPD_EVENT_MASK &
+ ~INTERRUPT_MASK_HPD_IRQ_MASK);
+
+ for (k = 0; k < 4; k++) {
+ /* Disable pre-cursor levels. */
+ set_reg(dev, REG_PHY_PRECURSOR_LANE_0 + 4 * k, 0);
+
+ /* Write default voltage swing levels to the TX registers. */
+ set_reg(dev, REG_PHY_VOLTAGE_DIFF_LANE_0 + 4 * k, 0);
+
+ /* Write default pre-emphasis levels to the TX registers. */
+ set_reg(dev, REG_PHY_POSTCURSOR_LANE_0 + 4 * k, 0);
+ }
+
+ return 0;
+}
+
+bool is_link_rate_valid(struct udevice *dev, u8 link_rate)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ bool valid = true;
+
+ if ((link_rate != LINK_BW_SET_162GBPS) &&
+ (link_rate != LINK_BW_SET_270GBPS) &&
+ (link_rate != LINK_BW_SET_540GBPS))
+ valid = false;
+ else if (link_rate > dp_tx->link_config.max_link_rate)
+ valid = false;
+
+ return valid;
+}
+
+bool is_lane_count_valid(struct udevice *dev, u8 lane_count)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ bool valid = true;
+
+ if ((lane_count != LANE_COUNT_SET_1) &&
+ (lane_count != LANE_COUNT_SET_2) &&
+ (lane_count != LANE_COUNT_SET_4))
+ valid = false;
+ else if (lane_count > dp_tx->link_config.max_lane_count)
+ valid = false;
+
+ return valid;
+}
+
+static int get_rx_capabilities(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+ u8 rx_max_link_rate;
+ u8 rx_max_lane_count;
+
+ if (!is_connected(dev))
+ return -ENODEV;
+
+ status = aux_read(dev, DPCD_RECEIVER_CAP_FIELD_START, 16,
+ dp_tx->dpcd_rx_caps);
+ if (status)
+ return -EIO;
+
+ rx_max_link_rate = dp_tx->dpcd_rx_caps[DPCD_MAX_LINK_RATE];
+ rx_max_lane_count = dp_tx->dpcd_rx_caps[DPCD_MAX_LANE_COUNT] &
+ DPCD_MAX_LANE_COUNT_MASK;
+
+ dp_tx->link_config.max_link_rate =
+ (rx_max_link_rate > dp_tx->max_link_rate) ?
+ dp_tx->max_link_rate : rx_max_link_rate;
+ if (!is_link_rate_valid(dev, rx_max_link_rate))
+ return -EINVAL;
+
+ dp_tx->link_config.max_lane_count =
+ (rx_max_lane_count > dp_tx->max_lane_count) ?
+ dp_tx->max_lane_count : rx_max_lane_count;
+ if (!is_lane_count_valid(dev, rx_max_lane_count))
+ return -EINVAL;
+
+ dp_tx->link_config.support_enhanced_framing_mode =
+ dp_tx->dpcd_rx_caps[DPCD_MAX_LANE_COUNT] &
+ DPCD_ENHANCED_FRAME_SUPPORT_MASK;
+ dp_tx->link_config.support_downspread_control =
+ dp_tx->dpcd_rx_caps[DPCD_MAX_DOWNSPREAD] &
+ DPCD_MAX_DOWNSPREAD_MASK;
+
+ return 0;
+}
+
+static void enable_main_link(struct udevice *dev)
+{
+ /* reset the scrambler. */
+ set_reg(dev, REG_FORCE_SCRAMBLER_RESET, 0x1);
+
+ /* enable the main stream. */
+ set_reg(dev, REG_ENABLE_MAIN_STREAM, 0x1);
+}
+
+static void disable_main_link(struct udevice *dev)
+{
+ /* reset the scrambler. */
+ set_reg(dev, REG_FORCE_SCRAMBLER_RESET, 0x1);
+
+ /* Disable the main stream. */
+ set_reg(dev, REG_ENABLE_MAIN_STREAM, 0x0);
+}
+
+static void reset_dp_phy(struct udevice *dev, u32 reset)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ u32 val;
+
+ set_reg(dev, REG_ENABLE, 0x0);
+
+ val = get_reg(dev, REG_PHY_CONFIG);
+
+ /* Apply reset. */
+ set_reg(dev, REG_PHY_CONFIG, val | reset);
+
+ /* Remove reset. */
+ set_reg(dev, REG_PHY_CONFIG, val);
+
+ /* Wait for the PHY to be ready. */
+ wait_phy_ready(dev, PHY_STATUS_LANES_READY_MASK(dp_tx->max_lane_count));
+
+ set_reg(dev, REG_ENABLE, 0x1);
+}
+
+/*
+ * enable or disable the enhanced framing symbol sequence for
+ * both the DisplayPort TX core and the RX device.
+ */
+static int set_enhanced_frame_mode(struct udevice *dev, u8 enable)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+ u8 val;
+
+ if (!is_connected(dev))
+ return -ENODEV;
+
+ if (dp_tx->link_config.support_enhanced_framing_mode)
+ dp_tx->link_config.enhanced_framing_mode = enable;
+ else
+ dp_tx->link_config.enhanced_framing_mode = false;
+
+ /* Write enhanced frame mode enable to the DisplayPort TX core. */
+ set_reg(dev, REG_ENHANCED_FRAME_EN,
+ dp_tx->link_config.enhanced_framing_mode);
+
+ /* Write enhanced frame mode enable to the RX device. */
+ status = aux_read(dev, DPCD_LANE_COUNT_SET, 0x1, &val);
+ if (status)
+ return -EIO;
+
+ if (dp_tx->link_config.enhanced_framing_mode)
+ val |= DPCD_ENHANCED_FRAME_EN_MASK;
+ else
+ val &= ~DPCD_ENHANCED_FRAME_EN_MASK;
+
+ status = aux_write(dev, DPCD_LANE_COUNT_SET, 0x1, &val);
+ if (status)
+ return -EIO;
+
+ return 0;
+}
+
+/*
+ * Set the number of lanes to be used by the main link for both
+ * the DisplayPort TX core and the RX device.
+ */
+static int set_lane_count(struct udevice *dev, u8 lane_count)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+ u8 val;
+
+ if (!is_connected(dev))
+ return -ENODEV;
+
+ printf(" set lane count to %u\n", lane_count);
+
+ dp_tx->link_config.lane_count = lane_count;
+
+ /* Write the new lane count to the DisplayPort TX core. */
+ set_reg(dev, REG_LANE_COUNT_SET, dp_tx->link_config.lane_count);
+
+ /* Write the new lane count to the RX device. */
+ status = aux_read(dev, DPCD_LANE_COUNT_SET, 0x1, &val);
+ if (status)
+ return -EIO;
+ val &= ~DPCD_LANE_COUNT_SET_MASK;
+ val |= dp_tx->link_config.lane_count;
+
+ status = aux_write(dev, DPCD_LANE_COUNT_SET, 0x1, &val);
+ if (status)
+ return -EIO;
+
+ return 0;
+}
+
+/*
+ * Set the clock frequency for the DisplayPort PHY corresponding
+ * to a desired data rate.
+ */
+static int set_clk_speed(struct udevice *dev, u32 speed)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+ u32 val;
+
+ /* Disable the DisplayPort TX core first. */
+ val = get_reg(dev, REG_ENABLE);
+ set_reg(dev, REG_ENABLE, 0x0);
+
+ /* Change speed of the feedback clock. */
+ set_reg(dev, REG_PHY_CLOCK_SELECT, speed);
+
+ /* Re-enable the DisplayPort TX core if it was previously enabled. */
+ if (val)
+ set_reg(dev, REG_ENABLE, 0x1);
+
+ /* Wait until the PHY is ready. */
+ status = wait_phy_ready(dev,
PHY_STATUS_LANES_READY_MASK(dp_tx->max_lane_count));
+ if (status)
+ return -EIO;
+
+ return 0;
+}
+
+/*
+ * Set the data rate to be used by the main link for both the
+ * DisplayPort TX core and the RX device.
+ */
+static int set_link_rate(struct udevice *dev, u8 link_rate)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+
+ /* Write a corresponding clock frequency to the DisplayPort TX core. */
+ switch (link_rate) {
+ case LINK_BW_SET_162GBPS:
+ printf(" set link rate to 1.62 Gb/s\n");
+ status = set_clk_speed(dev, PHY_CLOCK_SELECT_162GBPS);
+ break;
+ case LINK_BW_SET_270GBPS:
+ printf(" set link rate to 2.70 Gb/s\n");
+ status = set_clk_speed(dev, PHY_CLOCK_SELECT_270GBPS);
+ break;
+ case LINK_BW_SET_540GBPS:
+ printf(" set link rate to 5.40 Gb/s\n");
+ status = set_clk_speed(dev, PHY_CLOCK_SELECT_540GBPS);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (status)
+ return -EIO;
+
+ dp_tx->link_config.link_rate = link_rate;
+
+ /* Write new link rate to the DisplayPort TX core. */
+ set_reg(dev, REG_LINK_BW_SET, dp_tx->link_config.link_rate);
+
+ /* Write new link rate to the RX device. */
+ status = aux_write(dev, DPCD_LINK_BW_SET, 1,
+ &dp_tx->link_config.link_rate);
+ if (status)
+ return -EIO;
+
+ return 0;
+}
+
+/* link training */
+
+/*
+ * Determine what the RX device's required training delay is for
+ * link training.
+ */
+static int get_training_delay(struct udevice *dev, int training_state)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ u16 delay;
+
+ switch (dp_tx->dpcd_rx_caps[DPCD_TRAIN_AUX_RD_INTERVAL]) {
+ case DPCD_TRAIN_AUX_RD_INT_100_400US:
+ if (training_state == TS_CLOCK_RECOVERY)
+ /* delay for the clock recovery phase. */
+ delay = 100;
+ else
+ /* delay for the channel equalization phase. */
+ delay = 400;
+ break;
+ case DPCD_TRAIN_AUX_RD_INT_4MS:
+ delay = 4000;
+ break;
+ case DPCD_TRAIN_AUX_RD_INT_8MS:
+ delay = 8000;
+ break;
+ case DPCD_TRAIN_AUX_RD_INT_12MS:
+ delay = 12000;
+ break;
+ case DPCD_TRAIN_AUX_RD_INT_16MS:
+ delay = 16000;
+ break;
+ default:
+ /* Default to 20 ms. */
+ delay = 20000;
+ break;
+ }
+
+ return delay;
+}
+
+/*
+ * Set current voltage swing and pre-emphasis level settings from
+ * the link_config structure to hardware.
+ */
+static void set_vswing_preemp(struct udevice *dev, u8 *aux_data)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ u8 data;
+ u8 vs_level_rx = dp_tx->link_config.vs_level;
+ u8 pe_level_rx = dp_tx->link_config.pe_level;
+
+ /* Set up the data buffer for writing to the RX device. */
+ data = (pe_level_rx << DPCD_TRAINING_LANEX_SET_PE_SHIFT) | vs_level_rx;
+ /* The maximum voltage swing has been reached. */
+ if (vs_level_rx == MAXIMUM_VS_LEVEL)
+ data |= DPCD_TRAINING_LANEX_SET_MAX_VS_MASK;
+
+ /* The maximum pre-emphasis level has been reached. */
+ if (pe_level_rx == MAXIMUM_PE_LEVEL)
+ data |= DPCD_TRAINING_LANEX_SET_MAX_PE_MASK;
+ memset(aux_data, data, 4);
+}
+
+/*
+ * Set new voltage swing and pre-emphasis levels using the
+ * adjustment requests obtained from the RX device.
+ */
+static int adj_vswing_preemp(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+ u8 index;
+ u8 vs_level_adj_req[4];
+ u8 pe_level_adj_req[4];
+ u8 aux_data[4];
+ u8 *ajd_reqs = &dp_tx->lane_status_ajd_reqs[4];
+
+ /* Analyze the adjustment requests for changes in voltage swing and
+ * pre-emphasis levels.
+ */
+ vs_level_adj_req[0] = ajd_reqs[0] & DPCD_ADJ_REQ_LANE_0_2_VS_MASK;
+ vs_level_adj_req[1] = (ajd_reqs[0] & DPCD_ADJ_REQ_LANE_1_3_VS_MASK) >>
+ DPCD_ADJ_REQ_LANE_1_3_VS_SHIFT;
+ vs_level_adj_req[2] = ajd_reqs[1] & DPCD_ADJ_REQ_LANE_0_2_VS_MASK;
+ vs_level_adj_req[3] = (ajd_reqs[1] & DPCD_ADJ_REQ_LANE_1_3_VS_MASK) >>
+ DPCD_ADJ_REQ_LANE_1_3_VS_SHIFT;
+ pe_level_adj_req[0] = (ajd_reqs[0] & DPCD_ADJ_REQ_LANE_0_2_PE_MASK) >>
+ DPCD_ADJ_REQ_LANE_0_2_PE_SHIFT;
+ pe_level_adj_req[1] = (ajd_reqs[0] & DPCD_ADJ_REQ_LANE_1_3_PE_MASK) >>
+ DPCD_ADJ_REQ_LANE_1_3_PE_SHIFT;
+ pe_level_adj_req[2] = (ajd_reqs[1] & DPCD_ADJ_REQ_LANE_0_2_PE_MASK) >>
+ DPCD_ADJ_REQ_LANE_0_2_PE_SHIFT;
+ pe_level_adj_req[3] = (ajd_reqs[1] & DPCD_ADJ_REQ_LANE_1_3_PE_MASK) >>
+ DPCD_ADJ_REQ_LANE_1_3_PE_SHIFT;
+
+ /* Change the drive settings to match the adjustment requests. Use the
+ * greatest level requested.
+ */
+ dp_tx->link_config.vs_level = 0;
+ dp_tx->link_config.pe_level = 0;
+ for (index = 0; index < dp_tx->link_config.lane_count; index++) {
+ if (vs_level_adj_req[index] > dp_tx->link_config.vs_level)
+ dp_tx->link_config.vs_level = vs_level_adj_req[index];
+ if (pe_level_adj_req[index] > dp_tx->link_config.pe_level)
+ dp_tx->link_config.pe_level = pe_level_adj_req[index];
+ }
+
+ /* Verify that the voltage swing and pre-emphasis combination is
+ * allowed. Some combinations will result in a differential peak-to-peak
+ * voltage that is outside the permissible range. See the VESA
+ * DisplayPort v1.2 Specification, section 3.1.5.2.
+ * The valid combinations are:
+ * PE=0 PE=1 PE=2 PE=3
+ * VS=0 valid valid valid valid
+ * VS=1 valid valid valid
+ * VS=2 valid valid
+ * VS=3 valid
+ *
+ * NOTE:
+ * Xilinix dp_v3_1 driver seems to have an off by one error when
+ * limiting pe_level which is fixed here.
+ */
+ if (dp_tx->link_config.pe_level > (3 - dp_tx->link_config.vs_level))
+ dp_tx->link_config.pe_level = 3 - dp_tx->link_config.vs_level;
+
+ /* Make the adjustments to both the DisplayPort TX core and the RX
+ * device.
+ */
+ set_vswing_preemp(dev, aux_data);
+ /* Write the voltage swing and pre-emphasis levels for each lane to the
+ * RX device.
+ */
+ status = aux_write(dev, DPCD_TRAINING_LANE0_SET, 4, aux_data);
+ if (status)
+ return -EIO;
+
+ return 0;
+}
+
+/*
+ * Do a burst AUX read from the RX device over the AUX
+ * channel. The contents of the status registers will be stored for later use
by
+ * check_clock_recovery, check_channel_equalization, and
+ * adj_vswing_preemp.
+ */
+static int get_lane_status_adj_reqs(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+
+ /* Read and store 4 bytes of lane status and 2 bytes of adjustment
+ * requests.
+ */
+ status = aux_read(dev, DPCD_STATUS_LANE_0_1, 6,
+ dp_tx->lane_status_ajd_reqs);
+ if (status)
+ return -EIO;
+
+ return 0;
+}
+
+/*
+ * Check if the RX device's DisplayPort Configuration data (DPCD)
+ * indicates that the clock recovery sequence during link training was
+ * successful - the RX device's link clock and data recovery unit has realized
+ * and maintained the frequency lock for all lanes currently in use.
+ */
+static int check_clock_recovery(struct udevice *dev, u8 lane_count)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ u8 *lane_status = dp_tx->lane_status_ajd_reqs;
+
+ /* Check that all LANEx_CR_DONE bits are set. */
+ switch (lane_count) {
+ case LANE_COUNT_SET_4:
+ if (!(lane_status[1] & DPCD_STATUS_LANE_3_CR_DONE_MASK))
+ goto out_fail;
+ if (!(lane_status[1] & DPCD_STATUS_LANE_2_CR_DONE_MASK))
+ goto out_fail;
+ /* Drop through and check lane 1. */
+ case LANE_COUNT_SET_2:
+ if (!(lane_status[0] & DPCD_STATUS_LANE_1_CR_DONE_MASK))
+ goto out_fail;
+ /* Drop through and check lane 0. */
+ case LANE_COUNT_SET_1:
+ if (!(lane_status[0] & DPCD_STATUS_LANE_0_CR_DONE_MASK))
+ goto out_fail;
+ default:
+ /* All (lane_count) lanes have achieved clock recovery. */
+ break;
+ }
+
+ return 0;
+
+out_fail:
+ return -EIO;
+}
+
+/*
+ * Check if the RX device's DisplayPort Configuration data (DPCD)
+ * indicates that the channel equalization sequence during link training was
+ * successful - the RX device has achieved channel equalization, symbol lock,
+ * and interlane alignment for all lanes currently in use.
+ */
+static int check_channel_equalization(struct udevice *dev, u8 lane_count)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ u8 *lane_status = dp_tx->lane_status_ajd_reqs;
+
+ /* Check that all LANEx_CHANNEL_EQ_DONE bits are set. */
+ switch (lane_count) {
+ case LANE_COUNT_SET_4:
+ if (!(lane_status[1] & DPCD_STATUS_LANE_3_CE_DONE_MASK))
+ goto out_fail;
+ if (!(lane_status[1] & DPCD_STATUS_LANE_2_CE_DONE_MASK))
+ goto out_fail;
+ /* Drop through and check lane 1. */
+ case LANE_COUNT_SET_2:
+ if (!(lane_status[0] & DPCD_STATUS_LANE_1_CE_DONE_MASK))
+ goto out_fail;
+ /* Drop through and check lane 0. */
+ case LANE_COUNT_SET_1:
+ if (!(lane_status[0] & DPCD_STATUS_LANE_0_CE_DONE_MASK))
+ goto out_fail;
+ default:
+ /* All (lane_count) lanes have achieved channel equalization. */
+ break;
+ }
+
+ /* Check that all LANEx_SYMBOL_LOCKED bits are set. */
+ switch (lane_count) {
+ case LANE_COUNT_SET_4:
+ if (!(lane_status[1] & DPCD_STATUS_LANE_3_SL_DONE_MASK))
+ goto out_fail;
+ if (!(lane_status[1] & DPCD_STATUS_LANE_2_SL_DONE_MASK))
+ goto out_fail;
+ /* Drop through and check lane 1. */
+ case LANE_COUNT_SET_2:
+ if (!(lane_status[0] & DPCD_STATUS_LANE_1_SL_DONE_MASK))
+ goto out_fail;
+ /* Drop through and check lane 0. */
+ case LANE_COUNT_SET_1:
+ if (!(lane_status[0] & DPCD_STATUS_LANE_0_SL_DONE_MASK))
+ goto out_fail;
+ default:
+ /* All (lane_count) lanes have achieved symbol lock. */
+ break;
+ }
+
+ /* Check that interlane alignment is done. */
+ if (!(lane_status[2] & DPCD_LANE_ALIGN_STATUS_UPDATED_IA_DONE_MASK))
+ goto out_fail;
+
+ return 0;
+
+out_fail:
+ return -EIO;
+}
+
+/*
+ * Set the training pattern to be used during link training for
+ * both the DisplayPort TX core and the RX device.
+ */
+static int set_training_pattern(struct udevice *dev, u32 pattern)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+ u8 aux_data[5];
+
+ /* Write to the DisplayPort TX core. */
+ set_reg(dev, REG_TRAINING_PATTERN_SET, pattern);
+
+ aux_data[0] = pattern;
+
+ /* Write scrambler disable to the DisplayPort TX core. */
+ switch (pattern) {
+ case TRAINING_PATTERN_SET_OFF:
+ set_reg(dev, REG_SCRAMBLING_DISABLE, 0);
+ dp_tx->link_config.scrambler_en = 1;
+ break;
+ case TRAINING_PATTERN_SET_TP1:
+ case TRAINING_PATTERN_SET_TP2:
+ case TRAINING_PATTERN_SET_TP3:
+ aux_data[0] |= DPCD_TP_SET_SCRAMB_DIS_MASK;
+ set_reg(dev, REG_SCRAMBLING_DISABLE, 1);
+ dp_tx->link_config.scrambler_en = 0;
+ break;
+ default:
+ break;
+ }
+
+ /* Make the adjustments to both the DisplayPort TX core and the RX
+ * device.
+ */
+ set_vswing_preemp(dev, &aux_data[1]);
+ /* Write the voltage swing and pre-emphasis levels for each lane to the
+ * RX device.
+ */
+ if (pattern == TRAINING_PATTERN_SET_OFF)
+ status = aux_write(dev, DPCD_TP_SET, 1, aux_data);
+ else
+ status = aux_write(dev, DPCD_TP_SET, 5, aux_data);
+ if (status)
+ return -EIO;
+
+ return 0;
+}
+
+/*
+ * Run the clock recovery sequence as part of link training. The
+ * sequence is as follows:
+ * 0) Start signaling at the minimum voltage swing, pre-emphasis, and post-
+ * cursor levels.
+ * 1) Transmit training pattern 1 over the main link with symbol scrambling
+ * disabled.
+ * 2) The clock recovery loop. If clock recovery is unsuccessful after
+ * MaxIterations loop iterations, return.
+ * 2a) Wait for at least the period of time specified in the RX device's
+ * DisplayPort Configuration data (DPCD) register,
+ * TRAINING_AUX_RD_INTERVAL.
+ * 2b) Check if all lanes have achieved clock recovery lock. If so, return.
+ * 2c) Check if the same voltage swing level has been used 5 consecutive
+ * times or if the maximum level has been reached. If so, return.
+ * 2d) Adjust the voltage swing, pre-emphasis, and post-cursor levels as
+ * requested by the RX device.
+ * 2e) Loop back to 2a.
+ * For a more detailed description of the clock recovery sequence, see section
+ * 3.5.1.2.1 of the DisplayPort 1.2a specification document.
+ */
+static unsigned int training_state_clock_recovery(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+ u32 delay_us;
+ u8 prev_vs_level = 0;
+ u8 same_vs_level_count = 0;
+
+ /* Obtain the required delay for clock recovery as specified by the
+ * RX device.
+ */
+ delay_us = get_training_delay(dev, TS_CLOCK_RECOVERY);
+
+ /* Start CRLock. */
+
+ /* Transmit training pattern 1. */
+ /* Disable the scrambler. */
+ /* Start from minimal voltage swing and pre-emphasis levels. */
+ dp_tx->link_config.vs_level = 0;
+ dp_tx->link_config.pe_level = 0;
+ status = set_training_pattern(dev, TRAINING_PATTERN_SET_TP1);
+ if (status)
+ return TS_FAILURE;
+
+ while (1) {
+ /* Wait delay specified in TRAINING_AUX_RD_INTERVAL. */
+ udelay(delay_us);
+
+ /* Get lane and adjustment requests. */
+ status = get_lane_status_adj_reqs(dev);
+ if (status)
+ return TS_FAILURE;
+
+ /* Check if all lanes have realized and maintained the frequency
+ * lock and get adjustment requests.
+ */
+ status = check_clock_recovery(dev,
+ dp_tx->link_config.lane_count);
+ if (!status)
+ return TS_CHANNEL_EQUALIZATION;
+
+ /* Check if the same voltage swing for each lane has been used 5
+ * consecutive times.
+ */
+ if (prev_vs_level == dp_tx->link_config.vs_level) {
+ same_vs_level_count++;
+ } else {
+ same_vs_level_count = 0;
+ prev_vs_level = dp_tx->link_config.vs_level;
+ }
+ if (same_vs_level_count >= 5)
+ break;
+
+ /* Only try maximum voltage swing once. */
+ if (dp_tx->link_config.vs_level == MAXIMUM_VS_LEVEL)
+ break;
+
+ /* Adjust the drive settings as requested by the RX device. */
+ status = adj_vswing_preemp(dev);
+ if (status)
+ /* The AUX write failed. */
+ return TS_FAILURE;
+ }
+
+ return TS_ADJUST_LINK_RATE;
+}
+
+/*
+ * Run the channel equalization sequence as part of link
+ * training. The sequence is as follows:
+ * 0) Start signaling with the same drive settings used at the end of the
+ * clock recovery sequence.
+ * 1) Transmit training pattern 2 (or 3) over the main link with symbol
+ * scrambling disabled.
+ * 2) The channel equalization loop. If channel equalization is
+ * unsuccessful after 5 loop iterations, return.
+ * 2a) Wait for at least the period of time specified in the RX device's
+ * DisplayPort Configuration data (DPCD) register,
+ * TRAINING_AUX_RD_INTERVAL.
+ * 2b) Check if all lanes have achieved channel equalization, symbol lock,
+ * and interlane alignment. If so, return.
+ * 2c) Check if the same voltage swing level has been used 5 consecutive
+ * times or if the maximum level has been reached. If so, return.
+ * 2d) Adjust the voltage swing, pre-emphasis, and post-cursor levels as
+ * requested by the RX device.
+ * 2e) Loop back to 2a.
+ * For a more detailed description of the channel equalization sequence, see
+ * section 3.5.1.2.2 of the DisplayPort 1.2a specification document.
+ */
+static int training_state_channel_equalization(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+ u32 delay_us;
+ u32 iteration_count = 0;
+
+ /* Obtain the required delay for channel equalization as specified by
+ * the RX device.
+ */
+ delay_us = get_training_delay(dev, TS_CHANNEL_EQUALIZATION);
+
+ /* Start channel equalization. */
+
+ /* Write the current drive settings. */
+ /* Transmit training pattern 2/3. */
+ if (dp_tx->dpcd_rx_caps[DPCD_MAX_LANE_COUNT] & DPCD_TPS3_SUPPORT_MASK)
+ status = set_training_pattern(dev, TRAINING_PATTERN_SET_TP3);
+ else
+ status = set_training_pattern(dev, TRAINING_PATTERN_SET_TP2);
+
+ if (status)
+ return TS_FAILURE;
+
+ while (iteration_count < 5) {
+ /* Wait delay specified in TRAINING_AUX_RD_INTERVAL. */
+ udelay(delay_us);
+
+ /* Get lane and adjustment requests. */
+ status = get_lane_status_adj_reqs(dev);
+ if (status)
+ /* The AUX read failed. */
+ return TS_FAILURE;
+
+ /* Check that all lanes still have their clocks locked. */
+ status = check_clock_recovery(dev,
+ dp_tx->link_config.lane_count);
+ if (status)
+ break;
+
+ /* Check if all lanes have accomplished channel equalization,
+ * symbol lock, and interlane alignment.
+ */
+ status =
+ check_channel_equalization(dev,
+ dp_tx->link_config.lane_count);
+ if (!status)
+ return TS_SUCCESS;
+
+ /* Adjust the drive settings as requested by the RX device. */
+ status = adj_vswing_preemp(dev);
+ if (status)
+ /* The AUX write failed. */
+ return TS_FAILURE;
+
+ iteration_count++;
+ }
+
+ /* Tried 5 times with no success. Try a reduced bitrate first, then
+ * reduce the number of lanes.
+ */
+ return TS_ADJUST_LINK_RATE;
+}
+
+/*
+ * This function is reached if either the clock recovery or the channel
+ * equalization process failed during training. As a result, the data rate will
+ * be downshifted, and training will be re-attempted (starting with clock
+ * recovery) at the reduced data rate. If the data rate is already at 1.62
Gbps,
+ * a downshift in lane count will be attempted.
+ */
+static int training_state_adjust_link_rate(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+
+ switch (dp_tx->link_config.link_rate) {
+ case LINK_BW_SET_540GBPS:
+ status = set_link_rate(dev, LINK_BW_SET_270GBPS);
+ if (status) {
+ status = TS_FAILURE;
+ break;
+ }
+ status = TS_CLOCK_RECOVERY;
+ break;
+ case LINK_BW_SET_270GBPS:
+ status = set_link_rate(dev, LINK_BW_SET_162GBPS);
+ if (status) {
+ status = TS_FAILURE;
+ break;
+ }
+ status = TS_CLOCK_RECOVERY;
+ break;
+ default:
+ /* Already at the lowest link rate. Try reducing the lane
+ * count next.
+ */
+ status = TS_ADJUST_LANE_COUNT;
+ break;
+ }
+
+ return status;
+}
+
+/*
+ * This function is reached if either the clock recovery or the channel
+ * equalization process failed during training, and a minimal data rate of 1.62
+ * Gbps was being used. As a result, the number of lanes in use will be
reduced,
+ * and training will be re-attempted (starting with clock recovery) at this
+ * lower lane count.
+ */
+static int trainig_state_adjust_lane_count(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+
+ switch (dp_tx->link_config.lane_count) {
+ case LANE_COUNT_SET_4:
+ status = set_lane_count(dev, LANE_COUNT_SET_2);
+ if (status) {
+ status = TS_FAILURE;
+ break;
+ }
+
+ status = set_link_rate(dev, dp_tx->link_config.max_link_rate);
+ if (status) {
+ status = TS_FAILURE;
+ break;
+ }
+ status = TS_CLOCK_RECOVERY;
+ break;
+ case LANE_COUNT_SET_2:
+ status = set_lane_count(dev, LANE_COUNT_SET_1);
+ if (status) {
+ status = TS_FAILURE;
+ break;
+ }
+
+ status = set_link_rate(dev, dp_tx->link_config.max_link_rate);
+ if (status) {
+ status = TS_FAILURE;
+ break;
+ }
+ status = TS_CLOCK_RECOVERY;
+ break;
+ default:
+ /* Already at the lowest lane count. Training has failed at the
+ * lowest lane count and link rate.
+ */
+ status = TS_FAILURE;
+ break;
+ }
+
+ return status;
+}
+
+/*
+ * Check if the receiver's DisplayPort Configuration data (DPCD)
+ * indicates the receiver has achieved and maintained clock recovery, channel
+ * equalization, symbol lock, and interlane alignment for all lanes currently
in
+ * use.
+ */
+static int check_link_status(struct udevice *dev, u8 lane_count)
+{
+ u8 retry_count = 0;
+
+ if (!is_connected(dev))
+ return -ENODEV;
+
+ /* Retrieve AUX info. */
+ do {
+ int status;
+
+ /* Get lane and adjustment requests. */
+ status = get_lane_status_adj_reqs(dev);
+ if (status)
+ return -EIO;
+
+ /* Check if the link needs training. */
+ if ((check_clock_recovery(dev, lane_count) == 0) &&
+ (check_channel_equalization(dev, lane_count) == 0))
+ return 0;
+
+ retry_count++;
+ } while (retry_count < 5); /* Retry up to 5 times. */
+
+ return -EIO;
+}
+
+/*
+ * Run the link training process. It is implemented as a state
+ * machine, with each state returning the next state. First, the clock recovery
+ * sequence will be run; if successful, the channel equalization sequence will
+ * run. If either the clock recovery or channel equalization sequence failed,
+ * the link rate or the number of lanes used will be reduced and training will
+ * be re-attempted. If training fails at the minimal data rate, 1.62 Gbps with
+ * a single lane, training will no longer re-attempt and fail.
+ *
+ * ### Here be dragons ###
+ * There are undocumented timeout constraints in the link training process.
+ * In DP v1.2a spec, Chapter 3.5.1.2.2 a 10ms limit for the complete training
+ * process is mentioned. Which individual timeouts are derived and implemented
+ * by sink manufacturers is unknown. So each step should be as short as
possible
+ * and link training should start as soon as possible after HPD.
+ */
+static int run_training(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+ int training_state = TS_CLOCK_RECOVERY;
+
+ while (1) {
+ switch (training_state) {
+ case TS_CLOCK_RECOVERY:
+ training_state =
+ training_state_clock_recovery(dev);
+ break;
+ case TS_CHANNEL_EQUALIZATION:
+ training_state =
+ training_state_channel_equalization(dev);
+ break;
+ case TS_ADJUST_LINK_RATE:
+ training_state =
+ training_state_adjust_link_rate(dev);
+ break;
+ case TS_ADJUST_LANE_COUNT:
+ training_state =
+ trainig_state_adjust_lane_count(dev);
+ break;
+ default:
+ break;
+ }
+
+ if (training_state == TS_SUCCESS)
+ break;
+ else if (training_state == TS_FAILURE)
+ return -EIO;
+
+ if ((training_state == TS_ADJUST_LINK_RATE) ||
+ (training_state == TS_ADJUST_LANE_COUNT)) {
+ if (!dp_tx->train_adaptive)
+ return -EIO;
+
+ status = set_training_pattern(dev,
+ TRAINING_PATTERN_SET_OFF);
+ if (status)
+ return -EIO;
+ }
+ }
+
+ /* Final status check. */
+ status = check_link_status(dev, dp_tx->link_config.lane_count);
+ if (status)
+ return -EIO;
+
+ return 0;
+}
+
+/* link policy maker */
+
+/**
+ * Determine the common capabilities between the DisplayPort TX
+ * core and the RX device.
+ */
+static int cfg_main_link_max(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+
+ if (!is_connected(dev))
+ return -ENODEV;
+
+ /* Configure the main link to the maximum common link rate between the
+ * DisplayPort TX core and the RX device.
+ */
+ status = set_link_rate(dev, dp_tx->link_config.max_link_rate);
+ if (status)
+ return status;
+
+ /* Configure the main link to the maximum common lane count between the
+ * DisplayPort TX core and the RX device.
+ */
+ status = set_lane_count(dev, dp_tx->link_config.max_lane_count);
+ if (status)
+ return status;
+
+ return 0;
+}
+
+/*
+ * Check if the link needs training and runs the training
+ * sequence if training is required.
+ */
+static int establish_link(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int status;
+ int status2;
+
+ reset_dp_phy(dev, PHY_CONFIG_PHY_RESET_MASK);
+
+ /* Disable main link during training. */
+ disable_main_link(dev);
+
+ /* Wait for the PHY to be ready. */
+ status = wait_phy_ready(dev,
PHY_STATUS_LANES_READY_MASK(dp_tx->max_lane_count));
+ if (status)
+ return -EIO;
+
+ /* Train main link. */
+ status = run_training(dev);
+
+ /* Turn off the training pattern and enable scrambler. */
+ status2 = set_training_pattern(dev, TRAINING_PATTERN_SET_OFF);
+ if (status || status2)
+ return -EIO;
+
+ return 0;
+}
+
+/*
+ * Stream policy maker
+ */
+
+/*
+ * Calculate the following Main Stream Attributes (MSA):
+ * - Transfer unit size
+ * - User pixel width
+ * - Horizontal total clock
+ * - Vertical total clock
+ * - misc_0
+ * - misc_1
+ * - Data per lane
+ * - Average number of bytes per transfer unit
+ * - Number of initial wait cycles
+ * These values are derived from:
+ * - Bits per color
+ * - Horizontal resolution
+ * - Vertical resolution
+ * - Horizontal blank start
+ * - Vertical blank start
+ * - Pixel clock (in KHz)
+ * - Horizontal sync polarity
+ * - Vertical sync polarity
+ * - Horizontal sync pulse width
+ * - Vertical sync pulse width
+ */
+static void cfg_msa_recalculate(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ u32 video_bw;
+ u32 link_bw;
+ u32 words_per_line;
+ u8 bits_per_pixel;
+ struct main_stream_attributes *msa_config;
+ struct link_config *link_config;
+
+ msa_config = &dp_tx->main_stream_attributes;
+ link_config = &dp_tx->link_config;
+
+ /* Set the user pixel width to handle clocks that exceed the
+ * capabilities of the DisplayPort TX core.
+ */
+ if (msa_config->override_user_pixel_width == 0) {
+ if ((msa_config->pixel_clock_hz > 300000000) &&
+ (link_config->lane_count == LANE_COUNT_SET_4)) {
+ msa_config->user_pixel_width = 4;
+ } /* Xilinx driver used 75 MHz as a limit here, 150 MHZ should
+ * be more sane
+ */
+ else if ((msa_config->pixel_clock_hz > 150000000) &&
+ (link_config->lane_count != LANE_COUNT_SET_1)) {
+ msa_config->user_pixel_width = 2;
+ } else {
+ msa_config->user_pixel_width = 1;
+ }
+ }
+
+ /* Compute the rest of the MSA values. */
+ msa_config->n_vid = 27 * 1000 * link_config->link_rate;
+
+ /* Miscellaneous attributes. */
+ if (msa_config->bits_per_color == 6)
+ msa_config->misc_0 = MAIN_STREAMX_MISC0_BDC_6BPC;
+ else if (msa_config->bits_per_color == 8)
+ msa_config->misc_0 = MAIN_STREAMX_MISC0_BDC_8BPC;
+ else if (msa_config->bits_per_color == 10)
+ msa_config->misc_0 = MAIN_STREAMX_MISC0_BDC_10BPC;
+ else if (msa_config->bits_per_color == 12)
+ msa_config->misc_0 = MAIN_STREAMX_MISC0_BDC_12BPC;
+ else if (msa_config->bits_per_color == 16)
+ msa_config->misc_0 = MAIN_STREAMX_MISC0_BDC_16BPC;
+
+ msa_config->misc_0 = (msa_config->misc_0 <<
+ MAIN_STREAMX_MISC0_BDC_SHIFT) |
+ (msa_config->y_cb_cr_colorimetry <<
+ MAIN_STREAMX_MISC0_YCBCR_COLORIMETRY_SHIFT) |
+ (msa_config->dynamic_range <<
+ MAIN_STREAMX_MISC0_DYNAMIC_RANGE_SHIFT) |
+ (msa_config->component_format <<
+ MAIN_STREAMX_MISC0_COMPONENT_FORMAT_SHIFT) |
+ (msa_config->synchronous_clock_mode);
+
+ msa_config->misc_1 = 0;
+
+ /* Determine the number of bits per pixel for the specified color
+ * component format.
+ */
+ if (msa_config->component_format ==
+ MAIN_STREAMX_MISC0_COMPONENT_FORMAT_YCBCR422)
+ /* YCbCr422 color component format. */
+ bits_per_pixel = msa_config->bits_per_color * 2;
+ else
+ /* RGB or YCbCr 4:4:4 color component format. */
+ bits_per_pixel = msa_config->bits_per_color * 3;
+
+ /* Calculate the data per lane. */
+ words_per_line = (msa_config->h_active * bits_per_pixel);
+ if (words_per_line % 16)
+ words_per_line += 16;
+ words_per_line /= 16;
+
+ msa_config->data_per_lane = words_per_line - link_config->lane_count;
+ if (words_per_line % link_config->lane_count)
+ msa_config->data_per_lane += (words_per_line %
+ link_config->lane_count);
+
+ /* Allocate a fixed size for single-stream transport (SST)
+ * operation.
+ */
+ msa_config->transfer_unit_size = 64;
+
+ /* Calculate the average number of bytes per transfer unit.
+ * Note: Both the integer and the fractional part is stored in
+ * avg_bytes_per_tu.
+ */
+ video_bw = ((msa_config->pixel_clock_hz / 1000) * bits_per_pixel) / 8;
+ link_bw = (link_config->lane_count * link_config->link_rate * 27);
+ msa_config->avg_bytes_per_tu = (video_bw *
+ msa_config->transfer_unit_size) /
+ link_bw;
+
+ /* The number of initial wait cycles at the start of a new line
+ * by the framing logic. This allows enough data to be buffered
+ * in the input FIFO before video is sent.
+ */
+ if ((msa_config->avg_bytes_per_tu / 1000) <= 4)
+ msa_config->init_wait = 64;
+ else
+ msa_config->init_wait = msa_config->transfer_unit_size -
+ (msa_config->avg_bytes_per_tu / 1000);
+}
+
+/*
+ * Disable/enable the end of line reset to the internal video pipe in case of
+ * reduced blanking as required.
+ */
+static void set_line_reset(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ u32 reg_val;
+ u16 h_blank;
+ u16 h_reduced_blank;
+ struct main_stream_attributes *msa_config =
+ &dp_tx->main_stream_attributes;
+
+ h_blank = msa_config->h_total - msa_config->h_active;
+ /* Reduced blanking starts at ceil(0.2 * HTotal). */
+ h_reduced_blank = 2 * msa_config->h_total;
+ if (h_reduced_blank % 10)
+ h_reduced_blank += 10;
+ h_reduced_blank /= 10;
+
+ /* CVT spec. states h_blank is either 80 or 160 for reduced blanking. */
+ reg_val = get_reg(dev, REG_LINE_RESET_DISABLE);
+ if ((h_blank < h_reduced_blank) &&
+ ((h_blank == 80) || (h_blank == 160))) {
+ reg_val |= LINE_RESET_DISABLE_MASK;
+ } else {
+ reg_val &= ~LINE_RESET_DISABLE_MASK;
+ }
+ set_reg(dev, REG_LINE_RESET_DISABLE, reg_val);
+}
+
+/*
+ * Clear the main stream attributes registers of the DisplayPort
+ * TX core.
+ */
+static void clear_msa_values(struct udevice *dev)
+{
+ set_reg(dev, REG_MAIN_STREAM_HTOTAL, 0);
+ set_reg(dev, REG_MAIN_STREAM_VTOTAL, 0);
+ set_reg(dev, REG_MAIN_STREAM_POLARITY, 0);
+ set_reg(dev, REG_MAIN_STREAM_HSWIDTH, 0);
+ set_reg(dev, REG_MAIN_STREAM_VSWIDTH, 0);
+ set_reg(dev, REG_MAIN_STREAM_HRES, 0);
+ set_reg(dev, REG_MAIN_STREAM_VRES, 0);
+ set_reg(dev, REG_MAIN_STREAM_HSTART, 0);
+ set_reg(dev, REG_MAIN_STREAM_VSTART, 0);
+ set_reg(dev, REG_MAIN_STREAM_MISC0, 0);
+ set_reg(dev, REG_MAIN_STREAM_MISC1, 0);
+ set_reg(dev, REG_USER_PIXEL_WIDTH, 0);
+ set_reg(dev, REG_USER_DATA_COUNT_PER_LANE, 0);
+ set_reg(dev, REG_M_VID, 0);
+ set_reg(dev, REG_N_VID, 0);
+
+ set_reg(dev, REG_STREAM1, 0);
+ set_reg(dev, REG_TU_SIZE, 0);
+ set_reg(dev, REG_MIN_BYTES_PER_TU, 0);
+ set_reg(dev, REG_FRAC_BYTES_PER_TU, 0);
+ set_reg(dev, REG_INIT_WAIT, 0);
+}
+
+/*
+ * Set the main stream attributes registers of the DisplayPort TX
+ * core with the values specified in the main stream attributes configuration
+ * structure.
+ */
+static void set_msa_values(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ struct main_stream_attributes *msa_config =
+ &dp_tx->main_stream_attributes;
+
+ printf(" set MSA %u x %u\n", msa_config->h_active,
+ msa_config->v_active);
+
+ set_reg(dev, REG_MAIN_STREAM_HTOTAL, msa_config->h_total);
+ set_reg(dev, REG_MAIN_STREAM_VTOTAL, msa_config->v_total);
+ set_reg(dev, REG_MAIN_STREAM_POLARITY,
+ msa_config->h_sync_polarity |
+ (msa_config->v_sync_polarity <<
+ MAIN_STREAMX_POLARITY_VSYNC_POL_SHIFT));
+ set_reg(dev, REG_MAIN_STREAM_HSWIDTH, msa_config->h_sync_width);
+ set_reg(dev, REG_MAIN_STREAM_VSWIDTH, msa_config->v_sync_width);
+ set_reg(dev, REG_MAIN_STREAM_HRES, msa_config->h_active);
+ set_reg(dev, REG_MAIN_STREAM_VRES, msa_config->v_active);
+ set_reg(dev, REG_MAIN_STREAM_HSTART, msa_config->h_start);
+ set_reg(dev, REG_MAIN_STREAM_VSTART, msa_config->v_start);
+ set_reg(dev, REG_MAIN_STREAM_MISC0, msa_config->misc_0);
+ set_reg(dev, REG_MAIN_STREAM_MISC1, msa_config->misc_1);
+ set_reg(dev, REG_USER_PIXEL_WIDTH, msa_config->user_pixel_width);
+
+ set_reg(dev, REG_M_VID, msa_config->pixel_clock_hz / 1000);
+ set_reg(dev, REG_N_VID, msa_config->n_vid);
+ set_reg(dev, REG_USER_DATA_COUNT_PER_LANE, msa_config->data_per_lane);
+
+ set_line_reset(dev);
+
+ set_reg(dev, REG_TU_SIZE, msa_config->transfer_unit_size);
+ set_reg(dev, REG_MIN_BYTES_PER_TU, msa_config->avg_bytes_per_tu / 1000);
+ set_reg(dev, REG_FRAC_BYTES_PER_TU,
+ (msa_config->avg_bytes_per_tu % 1000) * 1024 / 1000);
+ set_reg(dev, REG_INIT_WAIT, msa_config->init_wait);
+}
+
+static void logicore_dp_tx_set_msa(struct udevice *dev,
+ struct logicore_dp_tx_msa *msa)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+
+ memset(&dp_tx->main_stream_attributes, 0,
+ sizeof(struct main_stream_attributes));
+
+ dp_tx->main_stream_attributes.pixel_clock_hz = msa->pixel_clock_hz;
+ dp_tx->main_stream_attributes.bits_per_color = msa->bits_per_color;
+ dp_tx->main_stream_attributes.h_active = msa->h_active;
+ dp_tx->main_stream_attributes.h_start = msa->h_start;
+ dp_tx->main_stream_attributes.h_sync_polarity = msa->h_sync_polarity;
+ dp_tx->main_stream_attributes.h_sync_width = msa->h_sync_width;
+ dp_tx->main_stream_attributes.h_total = msa->h_total;
+ dp_tx->main_stream_attributes.v_active = msa->v_active;
+ dp_tx->main_stream_attributes.v_start = msa->v_start;
+ dp_tx->main_stream_attributes.v_sync_polarity = msa->v_sync_polarity;
+ dp_tx->main_stream_attributes.v_sync_width = msa->v_sync_width;
+ dp_tx->main_stream_attributes.v_total = msa->v_total;
+ dp_tx->main_stream_attributes.override_user_pixel_width =
+ msa->override_user_pixel_width;
+ dp_tx->main_stream_attributes.user_pixel_width = msa->user_pixel_width;
+ dp_tx->main_stream_attributes.synchronous_clock_mode = 0;
+}
+
+/*
+ * external API
+ */
+
+int logicore_dp_tx_video_enable(struct udevice *dev,
+ struct logicore_dp_tx_msa *msa)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+ int res;
+ u8 power = 0x01;
+
+ if (!is_connected(dev)) {
+ printf(" no DP sink connected\n");
+ return -EIO;
+ }
+
+ initialize(dev);
+
+ disable_main_link(dev);
+
+ logicore_dp_tx_set_msa(dev, msa);
+
+ get_rx_capabilities(dev);
+
+ printf(" DP sink connected\n");
+ aux_write(dev, DPCD_SET_POWER_DP_PWR_VOLTAGE, 1, &power);
+ set_enhanced_frame_mode(dev, true);
+ cfg_main_link_max(dev);
+ res = establish_link(dev);
+ printf(" establish_link: %s, vs: %d, pe: %d\n",
+ res ? "failed" : "ok", dp_tx->link_config.vs_level,
+ dp_tx->link_config.pe_level);
+
+ cfg_msa_recalculate(dev);
+
+ clear_msa_values(dev);
+ set_msa_values(dev);
+
+ enable_main_link(dev);
+
+ return 0;
+}
+
+int logicore_dp_tx_power_on(struct udevice *dev, void *data)
+{
+ struct clk pixclock;
+ struct logicore_dp_tx_msa *msa;
+ struct logicore_dp_tx_msa mode_640_480_60 = {
+ .pixel_clock_hz = 25175000,
+ .bits_per_color = 8,
+ .h_active = 640,
+ .h_start = 144,
+ .h_sync_polarity = false,
+ .h_sync_width = 96,
+ .h_total = 800,
+ .v_active = 480,
+ .v_start = 35,
+ .v_sync_polarity = false,
+ .v_sync_width = 2,
+ .v_total = 525,
+ .override_user_pixel_width = false,
+ .user_pixel_width = 0,
+ };
+
+ struct logicore_dp_tx_msa mode_720_400_70 = {
+ .pixel_clock_hz = 28300000,
+ .bits_per_color = 8,
+ .h_active = 720,
+ .h_start = 162,
+ .h_sync_polarity = false,
+ .h_sync_width = 108,
+ .h_total = 900,
+ .v_active = 400,
+ .v_start = 37,
+ .v_sync_polarity = true,
+ .v_sync_width = 2,
+ .v_total = 449,
+ .override_user_pixel_width = false,
+ .user_pixel_width = 0,
+ };
+
+ struct logicore_dp_tx_msa mode_1024_768_60 = {
+ .pixel_clock_hz = 65000000,
+ .bits_per_color = 8,
+ .h_active = 1024,
+ .h_start = 296,
+ .h_sync_polarity = false,
+ .h_sync_width = 136,
+ .h_total = 1344,
+ .v_active = 768,
+ .v_start = 35,
+ .v_sync_polarity = false,
+ .v_sync_width = 2,
+ .v_total = 806,
+ .override_user_pixel_width = false,
+ .user_pixel_width = 0,
+ };
+
+ if (!strcmp(data, "1024_768_60"))
+ msa = &mode_1024_768_60;
+ else if (!strcmp(data, "720_400_70"))
+ msa = &mode_720_400_70;
+ else
+ msa = &mode_640_480_60;
+
+ if (clk_get_by_index(dev, 0, &pixclock)) {
+ printf("%s: Could not get pixelclock\n", dev->name);
+ return -1;
+ }
+ clk_set_rate(&pixclock, msa->pixel_clock_hz);
+
+ return logicore_dp_tx_video_enable(dev, msa);
+}
+
+int logicore_dp_tx_power_off(struct udevice *dev)
+{
+ return 0;
+}
+
+int logicore_dp_tx_probe(struct udevice *dev)
+{
+ struct dp_tx *dp_tx = dev_get_priv(dev);
+
+ dp_tx->s_axi_clk = S_AXI_CLK_DEFAULT;
+ dp_tx->train_adaptive = false;
+ dp_tx->max_link_rate = DPCD_MAX_LINK_RATE_540GBPS;
+ dp_tx->max_lane_count = DPCD_MAX_LANE_COUNT_4;
+
+ dp_tx->base = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
+ "reg", -1);
+
+ return 0;
+}
+
+struct transmitter_ops logicore_dp_tx_ops = {
+ .power_on = logicore_dp_tx_power_on,
+ .power_off = logicore_dp_tx_power_off,
+};
+
+static const struct udevice_id logicore_dp_tx_ids[] = {
+ { .compatible = "gdsys,logicore_dp_tx" },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(logicore_dp_tx) = {
+ .name = "logicore_dp_tx",
+ .id = UCLASS_TRANSMITTER,
+ .of_match = logicore_dp_tx_ids,
+ .probe = logicore_dp_tx_probe,
+ //.ofdata_to_platdata = logicore_dp_tx_ofdata_to_platdata,
+ .priv_auto_alloc_size = sizeof(struct dp_tx),
+ .ops = &logicore_dp_tx_ops,
+};
diff --git a/drivers/transmitter/logicore_dp_tx.h
b/drivers/transmitter/logicore_dp_tx.h
new file mode 100644
index 0000000000..32f9649b9c
--- /dev/null
+++ b/drivers/transmitter/logicore_dp_tx.h
@@ -0,0 +1,40 @@
+/*
+ * logicore_dp_tx.h
+ *
+ * Driver for XILINX LogiCore DisplayPort v6.1 TX (Source)
+ *
+ * (C) Copyright 2016
+ * Dirk Eibach, Guntermann & Drunck GmbH, dirk.eib...@gdsys.cc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __GDSYS_LOGICORE_DP_TX_H__
+#define __GDSYS_LOGICORE_DP_TX_H__
+
+/*
+ * this is a stripped down version of struct main_stream_attributes that
contains
+ * only the parameters that are not set by cfg_msa_recalculate()
+ */
+struct logicore_dp_tx_msa {
+ u32 pixel_clock_hz; /* The pixel clock of the stream (in
Hz). */
+ u32 bits_per_color; /* Number of bits per color component.
*/
+ u16 h_active; /* Horizontal active resolution
(pixels) */
+ u32 h_start; /* Horizontal blank start (in pixels).
*/
+ bool h_sync_polarity; /* Horizontal sync polarity
(0=negative|1=positive) */
+ u16 h_sync_width; /* Horizontal sync width (pixels) */
+ u16 h_total; /* Horizontal total (pixels) */
+ u16 v_active; /* Vertical active resolution (lines) */
+ u32 v_start; /* Vertical blank start (in lines). */
+ bool v_sync_polarity; /* Vertical sync polarity
(0=negative|1=positive) */
+ u16 v_sync_width; /* Vertical sync width (lines) */
+ u16 v_total; /* Vertical total (lines) */
+ bool override_user_pixel_width; /* If true, the value stored for
+ user_pixel_width will be used as
+ the pixel width. */
+ u32 user_pixel_width; /* The width of the user data input
port. */
+};
+
+int logicore_dp_tx_video_enable(struct udevice *dev, struct logicore_dp_tx_msa
*msa);
+
+#endif /* __GDSYS_LOGICORE_DP_TX_H__ */
diff --git a/drivers/transmitter/logicore_dp_tx_regif.h
b/drivers/transmitter/logicore_dp_tx_regif.h
new file mode 100644
index 0000000000..c4105605c9
--- /dev/null
+++ b/drivers/transmitter/logicore_dp_tx_regif.h
@@ -0,0 +1,365 @@
+/*
+ * logicore_dp_tx_regif.h
+ *
+ * Register interface definition for XILINX LogiCore DisplayPort v6.1 TX
(Source)
+ * based on Xilinx dp_v3_1 driver sources
+ *
+ * (C) Copyright 2016
+ * Dirk Eibach, Guntermann & Drunck GmbH, dirk.eib...@gdsys.cc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __GDSYS_LOGICORE_DP_TX_REGIF_H__
+#define __GDSYS_LOGICORE_DP_TX_REGIF_H__
+
+enum {
+ /* link configuration field */
+ REG_LINK_BW_SET = 0x000,
+ REG_LANE_COUNT_SET = 0x004,
+ REG_ENHANCED_FRAME_EN = 0x008,
+ REG_TRAINING_PATTERN_SET = 0x00C,
+ REG_LINK_QUAL_PATTERN_SET = 0x010,
+ REG_SCRAMBLING_DISABLE = 0x014,
+ REG_DOWNSPREAD_CTRL = 0x018,
+ REG_SOFT_RESET = 0x01C,
+
+ /* core enables */
+ REG_ENABLE = 0x080,
+ REG_ENABLE_MAIN_STREAM = 0x084,
+ REG_ENABLE_SEC_STREAM = 0x088,
+ REG_FORCE_SCRAMBLER_RESET = 0x0C0,
+ REG_MST_CONFIG = 0x0D0,
+ REG_LINE_RESET_DISABLE = 0x0F0,
+
+ /* core ID */
+ REG_VERSION = 0x0F8,
+ REG_CORE_ID = 0x0FC,
+
+ /* AUX channel interface */
+ REG_AUX_CMD = 0x100,
+ REG_AUX_WRITE_FIFO = 0x104,
+ REG_AUX_ADDRESS = 0x108,
+ REG_AUX_CLK_DIVIDER = 0x10C,
+ REG_USER_FIFO_OVERFLOW = 0x110,
+ REG_INTERRUPT_SIG_STATE = 0x130,
+ REG_AUX_REPLY_DATA = 0x134,
+ REG_AUX_REPLY_CODE = 0x138,
+ REG_AUX_REPLY_COUNT = 0x13C,
+ REG_INTERRUPT_STATUS = 0x140,
+ REG_INTERRUPT_MASK = 0x144,
+ REG_REPLY_DATA_COUNT = 0x148,
+ REG_REPLY_STATUS = 0x14C,
+ REG_HPD_DURATION = 0x150,
+
+ /* main stream attributes for SST / MST STREAM1 */
+ REG_STREAM1_MSA_START = 0x180,
+ REG_MAIN_STREAM_HTOTAL = 0x180,
+ REG_MAIN_STREAM_VTOTAL = 0x184,
+ REG_MAIN_STREAM_POLARITY = 0x188,
+ REG_MAIN_STREAM_HSWIDTH = 0x18C,
+ REG_MAIN_STREAM_VSWIDTH = 0x190,
+ REG_MAIN_STREAM_HRES = 0x194,
+ REG_MAIN_STREAM_VRES = 0x198,
+ REG_MAIN_STREAM_HSTART = 0x19C,
+ REG_MAIN_STREAM_VSTART = 0x1A0,
+ REG_MAIN_STREAM_MISC0 = 0x1A4,
+ REG_MAIN_STREAM_MISC1 = 0x1A8,
+ REG_M_VID = 0x1AC,
+ REG_TU_SIZE = 0x1B0,
+ REG_N_VID = 0x1B4,
+ REG_USER_PIXEL_WIDTH = 0x1B8,
+ REG_USER_DATA_COUNT_PER_LANE =0x1BC,
+ REG_MAIN_STREAM_INTERLACED = 0x1C0,
+ REG_MIN_BYTES_PER_TU = 0x1C4,
+ REG_FRAC_BYTES_PER_TU = 0x1C8,
+ REG_INIT_WAIT = 0x1CC,
+ REG_STREAM1 = 0x1D0,
+ REG_STREAM2 = 0x1D4,
+ REG_STREAM3 = 0x1D8,
+ REG_STREAM4 = 0x1DC,
+
+ /* PHY configuration status */
+ REG_PHY_CONFIG = 0x200,
+ REG_PHY_VOLTAGE_DIFF_LANE_0 = 0x220,
+ REG_PHY_VOLTAGE_DIFF_LANE_1 = 0x224,
+ REG_PHY_VOLTAGE_DIFF_LANE_2 = 0x228,
+ REG_PHY_VOLTAGE_DIFF_LANE_3 = 0x22C,
+ REG_PHY_TRANSMIT_PRBS7 = 0x230,
+ REG_PHY_CLOCK_SELECT = 0x234,
+ REG_PHY_POWER_DOWN = 0x238,
+ REG_PHY_PRECURSOR_LANE_0 = 0x23C,
+ REG_PHY_PRECURSOR_LANE_1 = 0x240,
+ REG_PHY_PRECURSOR_LANE_2 = 0x244,
+ REG_PHY_PRECURSOR_LANE_3 = 0x248,
+ REG_PHY_POSTCURSOR_LANE_0 = 0x24C,
+ REG_PHY_POSTCURSOR_LANE_1 = 0x250,
+ REG_PHY_POSTCURSOR_LANE_2 = 0x254,
+ REG_PHY_POSTCURSOR_LANE_3 = 0x258,
+ REG_PHY_STATUS = 0x280,
+ REG_GT_DRP_COMMAND = 0x2A0,
+ REG_GT_DRP_READ_DATA = 0x2A4,
+ REG_GT_DRP_CHANNEL_STATUS = 0x2A8,
+
+ /* DisplayPort audio */
+ REG_AUDIO_CONTROL = 0x300,
+ REG_AUDIO_CHANNELS = 0x304,
+ REG_AUDIO_INFO_DATA = 0x308,
+ REG_AUDIO_MAUD = 0x328,
+ REG_AUDIO_NAUD = 0x32C,
+ REG_AUDIO_EXT_DATA = 0x330,
+
+ /* HDCP */
+ REG_HDCP_ENABLE = 0x400,
+
+ /* main stream attributes for MST STREAM2, 3, and 4 */
+ REG_STREAM2_MSA_START = 0x500,
+ REG_STREAM3_MSA_START = 0x550,
+ REG_STREAM4_MSA_START = 0x5A0,
+
+ REG_VC_PAYLOAD_BUFFER_ADDR = 0x800,
+};
+
+enum {
+ LINK_BW_SET_162GBPS = 0x06,
+ LINK_BW_SET_270GBPS = 0x0A,
+ LINK_BW_SET_540GBPS = 0x14,
+};
+
+enum {
+ LANE_COUNT_SET_1 = 0x1,
+ LANE_COUNT_SET_2 = 0x2,
+ LANE_COUNT_SET_4 = 0x4,
+};
+
+enum {
+ TRAINING_PATTERN_SET_OFF = 0x0,
+ /* training pattern 1 used for clock recovery */
+ TRAINING_PATTERN_SET_TP1 = 0x1,
+ /* training pattern 2 used for channel equalization */
+ TRAINING_PATTERN_SET_TP2 = 0x2,
+ /* training pattern 3 used for channel equalization for cores with DP
v1.2 */
+ TRAINING_PATTERN_SET_TP3 = 0x3,
+};
+
+enum {
+ LINK_QUAL_PATTERN_SET_OFF = 0x0,
+ /* D10.2 unscrambled test pattern transmitted */
+ LINK_QUAL_PATTERN_SET_D102_TEST = 0x1,
+ /* symbol error rate measurement pattern transmitted */
+ LINK_QUAL_PATTERN_SET_SER_MES = 0x2,
+ /* pseudo random bit sequence 7 transmitted */
+ LINK_QUAL_PATTERN_SET_PRBS7 = 0x3,
+};
+
+enum {
+ SOFT_RESET_VIDEO_STREAM1_MASK = 0x00000001,
+ SOFT_RESET_VIDEO_STREAM2_MASK = 0x00000002,
+ SOFT_RESET_VIDEO_STREAM3_MASK = 0x00000004,
+ SOFT_RESET_VIDEO_STREAM4_MASK = 0x00000008,
+ SOFT_RESET_AUX_MASK = 0x00000080,
+ SOFT_RESET_VIDEO_STREAM_ALL_MASK = 0x0000000F,
+};
+
+enum {
+ MST_CONFIG_MST_EN_MASK = 0x00000001,
+};
+
+enum {
+ LINE_RESET_DISABLE_MASK = 0x1,
+};
+
+#define AUX_CMD_NBYTES_TRANSFER_MASK 0x0000000F
+
+#define AUX_CMD_SHIFT 8
+#define AUX_CMD_MASK 0x00000F00
+enum {
+ AUX_CMD_I2C_WRITE = 0x0,
+ AUX_CMD_I2C_READ = 0x1,
+ AUX_CMD_I2C_WRITE_STATUS = 0x2,
+ AUX_CMD_I2C_WRITE_MOT = 0x4,
+ AUX_CMD_I2C_READ_MOT = 0x5,
+ AUX_CMD_I2C_WRITE_STATUS_MOT = 0x6,
+ AUX_CMD_WRITE = 0x8,
+ AUX_CMD_READ = 0x9,
+};
+
+#define AUX_CLK_DIVIDER_VAL_MASK 0x00FF
+
+#define AUX_CLK_DIVIDER_AUX_SIG_WIDTH_FILT_SHIFT 8
+#define AUX_CLK_DIVIDER_AUX_SIG_WIDTH_FILT_MASK 0xFF00
+
+enum {
+ INTERRUPT_SIG_STATE_HPD_STATE_MASK = 0x00000001,
+ INTERRUPT_SIG_STATE_REQUEST_STATE_MASK = 0x00000002,
+ INTERRUPT_SIG_STATE_REPLY_STATE_MASK = 0x00000004,
+ INTERRUPT_SIG_STATE_REPLY_TIMEOUT_MASK = 0x00000008,
+};
+
+enum {
+ AUX_REPLY_CODE_ACK = 0x0,
+ AUX_REPLY_CODE_I2C_ACK = 0x0,
+ AUX_REPLY_CODE_NACK = 0x1,
+ AUX_REPLY_CODE_DEFER = 0x2,
+ AUX_REPLY_CODE_I2C_NACK = 0x4,
+ AUX_REPLY_CODE_I2C_DEFER = 0x8,
+};
+
+enum {
+ INTERRUPT_STATUS_HPD_IRQ_MASK = 0x00000001,
+ INTERRUPT_STATUS_HPD_EVENT_MASK = 0x00000002,
+ INTERRUPT_STATUS_REPLY_RECEIVED_MASK = 0x00000004,
+ INTERRUPT_STATUS_REPLY_TIMEOUT_MASK = 0x00000008,
+ INTERRUPT_STATUS_HPD_PULSE_DETECTED_MASK = 0x00000010,
+ INTERRUPT_STATUS_EXT_PKT_TXD_MASK = 0x00000020,
+};
+
+enum {
+ INTERRUPT_MASK_HPD_IRQ_MASK = 0x00000001,
+ INTERRUPT_MASK_HPD_EVENT_MASK = 0x00000002,
+ INTERRUPT_MASK_REPLY_RECEIVED_MASK = 0x00000004,
+ INTERRUPT_MASK_REPLY_TIMEOUT_MASK = 0x00000008,
+ INTERRUPT_MASK_HPD_PULSE_DETECTED_MASK = 0x00000010,
+ INTERRUPT_MASK_EXT_PKT_TXD_MASK = 0x00000020,
+};
+
+#define REPLY_STATUS_REPLY_STATUS_STATE_SHIFT 4
+#define REPLY_STATUS_REPLY_STATUS_STATE_MASK 0x00000FF0
+enum {
+ REPLY_STATUS_REPLY_RECEIVED_MASK = 0x00000001,
+ REPLY_STATUS_REPLY_IN_PROGRESS_MASK = 0x00000002,
+ REPLY_STATUS_REQUEST_IN_PROGRESS_MASK = 0x00000004,
+ REPLY_STATUS_REPLY_ERROR_MASK = 0x00000008,
+};
+
+#define MAIN_STREAMX_POLARITY_VSYNC_POL_SHIFT 1
+enum {
+ MAIN_STREAMX_POLARITY_HSYNC_POL_MASK = 0x00000001,
+ MAIN_STREAMX_POLARITY_VSYNC_POL_MASK = 0x00000002,
+};
+
+enum {
+ MAIN_STREAMX_MISC0_SYNC_CLK_MASK = 0x00000001,
+};
+
+#define MAIN_STREAMX_MISC0_COMPONENT_FORMAT_SHIFT 1
+#define MAIN_STREAMX_MISC0_COMPONENT_FORMAT_MASK 0x00000006
+enum {
+ MAIN_STREAMX_MISC0_COMPONENT_FORMAT_RGB = 0x0,
+ MAIN_STREAMX_MISC0_COMPONENT_FORMAT_YCBCR422 = 0x1,
+ MAIN_STREAMX_MISC0_COMPONENT_FORMAT_YCBCR444 = 0x2,
+};
+
+#define MAIN_STREAMX_MISC0_DYNAMIC_RANGE_SHIFT 3
+#define MAIN_STREAMX_MISC0_DYNAMIC_RANGE_MASK 0x00000008
+
+#define MAIN_STREAMX_MISC0_YCBCR_COLORIMETRY_SHIFT 4
+#define MAIN_STREAMX_MISC0_YCBCR_COLORIMETRY_MASK 0x00000010
+
+#define MAIN_STREAMX_MISC0_BDC_SHIFT 5
+#define MAIN_STREAMX_MISC0_BDC_MASK 0x000000E0
+enum {
+ MAIN_STREAMX_MISC0_BDC_6BPC = 0x0,
+ MAIN_STREAMX_MISC0_BDC_8BPC = 0x1,
+ MAIN_STREAMX_MISC0_BDC_10BPC = 0x2,
+ MAIN_STREAMX_MISC0_BDC_12BPC = 0x3,
+ MAIN_STREAMX_MISC0_BDC_16BPC = 0x4,
+};
+
+enum {
+ PHY_CONFIG_PHY_RESET_ENABLE_MASK = 0x0000000,
+ PHY_CONFIG_PHY_RESET_MASK = 0x0000001,
+ PHY_CONFIG_GTTX_RESET_MASK = 0x0000002,
+ PHY_CONFIG_GT_ALL_RESET_MASK = 0x0000003,
+ PHY_CONFIG_TX_PHY_PMA_RESET_MASK = 0x0000100,
+ PHY_CONFIG_TX_PHY_PCS_RESET_MASK = 0x0000200,
+ PHY_CONFIG_TX_PHY_POLARITY_MASK = 0x0000800,
+ PHY_CONFIG_TX_PHY_PRBSFORCEERR_MASK = 0x0001000,
+ PHY_CONFIG_TX_PHY_POLARITY_IND_LANE_MASK = 0x0010000,
+ PHY_CONFIG_TX_PHY_POLARITY_LANE0_MASK = 0x0020000,
+ PHY_CONFIG_TX_PHY_POLARITY_LANE1_MASK = 0x0040000,
+ PHY_CONFIG_TX_PHY_POLARITY_LANE2_MASK = 0x0080000,
+ PHY_CONFIG_TX_PHY_POLARITY_LANE3_MASK = 0x0100000,
+ PHY_CONFIG_TX_PHY_8B10BEN_MASK = 0x0200000,
+};
+
+#define PHY_CONFIG_TX_PHY_LOOPBACK_SHIFT 13
+#define PHY_CONFIG_TX_PHY_LOOPBACK_MASK 0x000E000
+
+enum {
+ PHY_CLOCK_SELECT_162GBPS = 0x1,
+ PHY_CLOCK_SELECT_270GBPS = 0x3,
+ PHY_CLOCK_SELECT_540GBPS = 0x5,
+};
+
+enum {
+ VS_LEVEL_0 = 0x2,
+ VS_LEVEL_1 = 0x5,
+ VS_LEVEL_2 = 0x8,
+ VS_LEVEL_3 = 0xF,
+ VS_LEVEL_OFFSET = 0x4,
+};
+
+enum {
+ PE_LEVEL_0 = 0x00,
+ PE_LEVEL_1 = 0x0E,
+ PE_LEVEL_2 = 0x14,
+ PE_LEVEL_3 = 0x1B,
+};
+
+enum {
+ PHY_STATUS_RESET_LANE_2_3_DONE_SHIFT = 2,
+ PHY_STATUS_TX_ERROR_LANE_0_SHIFT = 18,
+ PHY_STATUS_TX_BUFFER_STATUS_LANE_1_SHIFT = 20,
+ PHY_STATUS_TX_ERROR_LANE_1_SHIFT = 22,
+ PHY_STATUS_TX_BUFFER_STATUS_LANE_0_SHIFT = 16,
+ PHY_STATUS_TX_BUFFER_STATUS_LANE_2_SHIFT = 24,
+ PHY_STATUS_TX_ERROR_LANE_2_SHIFT = 26,
+ PHY_STATUS_TX_BUFFER_STATUS_LANE_3_SHIFT = 28,
+ PHY_STATUS_TX_ERROR_LANE_3_SHIFT = 30,
+};
+
+enum {
+ PHY_STATUS_RESET_LANE_0_DONE_MASK = 0x00000001,
+ PHY_STATUS_RESET_LANE_1_DONE_MASK = 0x00000002,
+ PHY_STATUS_RESET_LANE_2_3_DONE_MASK = 0x0000000C,
+ PHY_STATUS_PLL_LANE0_1_LOCK_MASK = 0x00000010,
+ PHY_STATUS_PLL_LANE2_3_LOCK_MASK = 0x00000020,
+ PHY_STATUS_PLL_FABRIC_LOCK_MASK = 0x00000040,
+ PHY_STATUS_TX_BUFFER_STATUS_LANE_0_MASK = 0x00030000,
+ PHY_STATUS_TX_ERROR_LANE_0_MASK = 0x000C0000,
+ PHY_STATUS_TX_BUFFER_STATUS_LANE_1_MASK = 0x00300000,
+ PHY_STATUS_TX_ERROR_LANE_1_MASK = 0x00C00000,
+ PHY_STATUS_TX_BUFFER_STATUS_LANE_2_MASK = 0x03000000,
+ PHY_STATUS_TX_ERROR_LANE_2_MASK = 0x0C000000,
+ PHY_STATUS_TX_BUFFER_STATUS_LANE_3_MASK = 0x30000000,
+ PHY_STATUS_TX_ERROR_LANE_3_MASK = 0xC0000000,
+};
+
+#define PHY_STATUS_LANE_0_READY_MASK \
+ (PHY_STATUS_RESET_LANE_0_DONE_MASK | \
+ PHY_STATUS_PLL_LANE0_1_LOCK_MASK)
+#define PHY_STATUS_LANES_0_1_READY_MASK \
+ (PHY_STATUS_LANE_0_READY_MASK | \
+ PHY_STATUS_RESET_LANE_1_DONE_MASK)
+/*
+ * PHY_STATUS_ALL_LANES_READY_MASK seems zo be missing lanes 0 and 1 in
+ * Xilinx dp_v3_0 implementation
+ */
+#define PHY_STATUS_ALL_LANES_READY_MASK \
+ (PHY_STATUS_LANES_0_1_READY_MASK | \
+ PHY_STATUS_RESET_LANE_2_3_DONE_MASK | \
+ PHY_STATUS_PLL_LANE2_3_LOCK_MASK)
+#define PHY_STATUS_LANES_READY_MASK(n) \
+ (((n) > 2) ? PHY_STATUS_ALL_LANES_READY_MASK : \
+ ((n) == 2) ? PHY_STATUS_LANES_0_1_READY_MASK : \
+ PHY_STATUS_LANE_0_READY_MASK)
+
+#define GT_DRP_COMMAND_DRP_ADDR_MASK 0x000F
+#define GT_DRP_COMMAND_DRP_RW_CMD_MASK 0x0080
+#define GT_DRP_COMMAND_DRP_W_DATA_SHIFT 16
+#define GT_DRP_COMMAND_DRP_W_DATA_MASK 0xFF00
+
+#define HDCP_ENABLE_BYPASS_DISABLE_MASK 0x0001
+
+#endif /* __GDSYS_LOGICORE_DP_TX_REGIF_H__ */
--
2.11.0
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