tegra: video: Add Embedded DisplayPort driver

This interface is used on laptop devices based on Tegra. Add a driver which
provides access to the eDP interface. The driver uses the display port
uclass.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>

drivers/video/tegra124/Makefile

@@ -4,4 +4,5 @@
 # SPDX-License-Identifier:      GPL-2.0+
 #
 
+obj-y += dp.o
 obj-y += sor.o

drivers/video/tegra124/displayport.h

+/*
+ * Copyright (c) 2014, NVIDIA Corporation.
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#ifndef _TEGRA_DISPLAYPORT_H
+#define _TEGRA_DISPLAYPORT_H
+
+#include <linux/drm_dp_helper.h>
+
+struct dpaux_ctlr {
+	u32 reserved0;
+	u32 intr_en_aux;
+	u32 reserved2_4;
+	u32 intr_aux;
+};
+
+#define DPAUX_INTR_EN_AUX				0x1
+#define DPAUX_INTR_AUX					0x5
+#define DPAUX_DP_AUXDATA_WRITE_W(i)			(0x9 + 4 * (i))
+#define DPAUX_DP_AUXDATA_READ_W(i)			(0x19 + 4 * (i))
+#define DPAUX_DP_AUXADDR				0x29
+#define DPAUX_DP_AUXCTL					0x2d
+#define DPAUX_DP_AUXCTL_CMDLEN_SHIFT			0
+#define DPAUX_DP_AUXCTL_CMDLEN_FIELD			0xff
+#define DPAUX_DP_AUXCTL_CMD_SHIFT			12
+#define DPAUX_DP_AUXCTL_CMD_MASK			(0xf << 12)
+#define DPAUX_DP_AUXCTL_CMD_I2CWR			(0 << 12)
+#define DPAUX_DP_AUXCTL_CMD_I2CRD			(1 << 12)
+#define DPAUX_DP_AUXCTL_CMD_I2CREQWSTAT			(2 << 12)
+#define DPAUX_DP_AUXCTL_CMD_MOTWR			(4 << 12)
+#define DPAUX_DP_AUXCTL_CMD_MOTRD			(5 << 12)
+#define DPAUX_DP_AUXCTL_CMD_MOTREQWSTAT			(6 << 12)
+#define DPAUX_DP_AUXCTL_CMD_AUXWR			(8 << 12)
+#define DPAUX_DP_AUXCTL_CMD_AUXRD			(9 << 12)
+#define DPAUX_DP_AUXCTL_TRANSACTREQ_SHIFT		16
+#define DPAUX_DP_AUXCTL_TRANSACTREQ_MASK		(0x1 << 16)
+#define DPAUX_DP_AUXCTL_TRANSACTREQ_DONE		(0 << 16)
+#define DPAUX_DP_AUXCTL_TRANSACTREQ_PENDING		(1 << 16)
+#define DPAUX_DP_AUXCTL_RST_SHIFT			31
+#define DPAUX_DP_AUXCTL_RST_DEASSERT			(0 << 31)
+#define DPAUX_DP_AUXCTL_RST_ASSERT			(1 << 31)
+#define DPAUX_DP_AUXSTAT				0x31
+#define DPAUX_DP_AUXSTAT_HPD_STATUS_SHIFT		28
+#define DPAUX_DP_AUXSTAT_HPD_STATUS_UNPLUG		(0 << 28)
+#define DPAUX_DP_AUXSTAT_HPD_STATUS_PLUGGED		(1 << 28)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_SHIFT		20
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_MASK		(0xf << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_IDLE		(0 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_SYNC		(1 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_START1		(2 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_COMMAND		(3 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_ADDRESS		(4 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_LENGTH		(5 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_WRITE1		(6 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_READ1		(7 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_GET_M		(8 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_STOP1		(9 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_STOP2		(10 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_REPLY		(11 << 20)
+#define DPAUX_DP_AUXSTAT_AUXCTL_STATE_CLEANUP		(12 << 20)
+#define DPAUX_DP_AUXSTAT_REPLYTYPE_SHIFT		16
+#define DPAUX_DP_AUXSTAT_REPLYTYPE_MASK			(0xf << 16)
+#define DPAUX_DP_AUXSTAT_REPLYTYPE_ACK			(0 << 16)
+#define DPAUX_DP_AUXSTAT_REPLYTYPE_NACK			(1 << 16)
+#define DPAUX_DP_AUXSTAT_REPLYTYPE_DEFER		(2 << 16)
+#define DPAUX_DP_AUXSTAT_REPLYTYPE_I2CNACK		(4 << 16)
+#define DPAUX_DP_AUXSTAT_REPLYTYPE_I2CDEFER		(8 << 16)
+#define DPAUX_DP_AUXSTAT_NO_STOP_ERROR_SHIFT		11
+#define DPAUX_DP_AUXSTAT_NO_STOP_ERROR_NOT_PENDING	(0 << 11)
+#define DPAUX_DP_AUXSTAT_NO_STOP_ERROR_PENDING		(1 << 11)
+#define DPAUX_DP_AUXSTAT_SINKSTAT_ERROR_SHIFT		10
+#define DPAUX_DP_AUXSTAT_SINKSTAT_ERROR_NOT_PENDING	(0 << 10)
+#define DPAUX_DP_AUXSTAT_SINKSTAT_ERROR_PENDING		(1 << 10)
+#define DPAUX_DP_AUXSTAT_RX_ERROR_SHIFT			9
+#define DPAUX_DP_AUXSTAT_RX_ERROR_NOT_PENDING		(0 << 9)
+#define DPAUX_DP_AUXSTAT_RX_ERROR_PENDING		(1 << 9)
+#define DPAUX_DP_AUXSTAT_TIMEOUT_ERROR_SHIFT		8
+#define DPAUX_DP_AUXSTAT_TIMEOUT_ERROR_NOT_PENDING	(0 << 8)
+#define DPAUX_DP_AUXSTAT_TIMEOUT_ERROR_PENDING		(1 << 8)
+#define DPAUX_DP_AUXSTAT_REPLY_M_SHIFT			0
+#define DPAUX_DP_AUXSTAT_REPLY_M_MASK			(0xff << 0)
+#define DPAUX_HPD_CONFIG				(0x3d)
+#define DPAUX_HPD_IRQ_CONFIG				0x41
+#define DPAUX_DP_AUX_CONFIG				0x45
+#define DPAUX_HYBRID_PADCTL				0x49
+#define DPAUX_HYBRID_PADCTL_I2C_SDA_INPUT_RCV_SHIFT	15
+#define DPAUX_HYBRID_PADCTL_I2C_SDA_INPUT_RCV_DISABLE	(0 << 15)
+#define DPAUX_HYBRID_PADCTL_I2C_SDA_INPUT_RCV_ENABLE	(1 << 15)
+#define DPAUX_HYBRID_PADCTL_I2C_SCL_INPUT_RCV_SHIFT	14
+#define DPAUX_HYBRID_PADCTL_I2C_SCL_INPUT_RCV_DISABLE	(0 << 14)
+#define DPAUX_HYBRID_PADCTL_I2C_SCL_INPUT_RCV_ENABLE	(1 << 14)
+#define DPAUX_HYBRID_PADCTL_AUX_CMH_SHIFT		12
+#define DPAUX_HYBRID_PADCTL_AUX_CMH_DEFAULT_MASK	(0x3 << 12)
+#define DPAUX_HYBRID_PADCTL_AUX_CMH_V0_60		(0 << 12)
+#define DPAUX_HYBRID_PADCTL_AUX_CMH_V0_64		(1 << 12)
+#define DPAUX_HYBRID_PADCTL_AUX_CMH_V0_70		(2 << 12)
+#define DPAUX_HYBRID_PADCTL_AUX_CMH_V0_56		(3 << 12)
+#define DPAUX_HYBRID_PADCTL_AUX_DRVZ_SHIFT		8
+#define DPAUX_HYBRID_PADCTL_AUX_DRVZ_DEFAULT_MASK	(0x7 << 8)
+#define DPAUX_HYBRID_PADCTL_AUX_DRVZ_OHM_78		(0 << 8)
+#define DPAUX_HYBRID_PADCTL_AUX_DRVZ_OHM_60		(1 << 8)
+#define DPAUX_HYBRID_PADCTL_AUX_DRVZ_OHM_54		(2 << 8)
+#define DPAUX_HYBRID_PADCTL_AUX_DRVZ_OHM_45		(3 << 8)
+#define DPAUX_HYBRID_PADCTL_AUX_DRVZ_OHM_50		(4 << 8)
+#define DPAUX_HYBRID_PADCTL_AUX_DRVZ_OHM_42		(5 << 8)
+#define DPAUX_HYBRID_PADCTL_AUX_DRVZ_OHM_39		(6 << 8)
+#define DPAUX_HYBRID_PADCTL_AUX_DRVZ_OHM_34		(7 << 8)
+#define DPAUX_HYBRID_PADCTL_AUX_DRVI_SHIFT		2
+#define DPAUX_HYBRID_PADCTL_AUX_DRVI_DEFAULT_MASK	(0x3f << 2)
+#define DPAUX_HYBRID_PADCTL_AUX_INPUT_RCV_SHIFT		1
+#define DPAUX_HYBRID_PADCTL_AUX_INPUT_RCV_DISABLE	(0 << 1)
+#define DPAUX_HYBRID_PADCTL_AUX_INPUT_RCV_ENABLE	(1 << 1)
+#define DPAUX_HYBRID_PADCTL_MODE_SHIFT			0
+#define DPAUX_HYBRID_PADCTL_MODE_AUX			0
+#define DPAUX_HYBRID_PADCTL_MODE_I2C			1
+#define DPAUX_HYBRID_SPARE				0x4d
+#define DPAUX_HYBRID_SPARE_PAD_PWR_POWERUP		0
+#define DPAUX_HYBRID_SPARE_PAD_PWR_POWERDOWN		1
+
+#define DP_AUX_DEFER_MAX_TRIES		7
+#define DP_AUX_TIMEOUT_MAX_TRIES	2
+#define DP_POWER_ON_MAX_TRIES		3
+
+#define DP_AUX_MAX_BYTES		16
+
+#define DP_AUX_TIMEOUT_MS		40
+#define DP_DPCP_RETRY_SLEEP_NS		400
+
+/* DPCD definitions which are not defined in drm_dp_helper.h */
+#define DP_DPCD_REV_MAJOR_SHIFT				4
+#define DP_DPCD_REV_MAJOR_MASK				(0xf << 4)
+#define DP_DPCD_REV_MINOR_SHIFT				0
+#define DP_DPCD_REV_MINOR_MASK				0xf
+
+#define DP_MAX_LINK_RATE_VAL_1_62_GPBS			0x6
+#define DP_MAX_LINK_RATE_VAL_2_70_GPBS			0xa
+#define DP_MAX_LINK_RATE_VAL_5_40_GPBS			0x4
+
+#define DP_MAX_LANE_COUNT_LANE_1			0x1
+#define DP_MAX_LANE_COUNT_LANE_2			0x2
+#define DP_MAX_LANE_COUNT_LANE_4			0x4
+#define DP_MAX_LANE_COUNT_ENHANCED_FRAMING_YES		(1 << 7)
+
+#define DP_MAX_DOWNSPREAD_VAL_NONE			0
+#define DP_MAX_DOWNSPREAD_VAL_0_5_PCT			1
+#define DP_MAX_DOWNSPREAD_NO_AUX_HANDSHAKE_LT_T		(1 << 6)
+
+#define DP_EDP_CONFIGURATION_CAP_ASC_RESET_YES		1
+#define DP_EDP_CONFIGURATION_CAP_FRAMING_CHANGE_YES	(1 << 1)
+
+#define DP_LANE_COUNT_SET_ENHANCEDFRAMING_T		(1 << 7)
+
+#define DP_TRAINING_PATTERN_SET_SC_DISABLED_T		(1 << 5)
+
+#define DP_MAIN_LINK_CHANNEL_CODING_SET_ASC_RESET_DISABLE	0
+#define DP_MAIN_LINK_CHANNEL_CODING_SET_ASC_RESET_ENABLE	1
+
+#define NV_DPCD_TRAINING_LANE0_1_SET2			0x10f
+#define NV_DPCD_TRAINING_LANE2_3_SET2			0x110
+#define NV_DPCD_LANEX_SET2_PC2_MAX_REACHED_T		(1 << 2)
+#define NV_DPCD_LANEXPLUS1_SET2_PC2_MAX_REACHED_T	(1 << 6)
+
+#define NV_DPCD_STATUS_LANEX_CR_DONE_SHIFT		0
+#define NV_DPCD_STATUS_LANEX_CR_DONE_NO			(0x00000000)
+#define NV_DPCD_STATUS_LANEX_CR_DONE_YES		(0x00000001)
+#define NV_DPCD_STATUS_LANEX_CHN_EQ_DONE_SHIFT		1
+#define NV_DPCD_STATUS_LANEX_CHN_EQ_DONE_NO		(0x00000000 << 1)
+#define NV_DPCD_STATUS_LANEX_CHN_EQ_DONE_YES		(0x00000001 << 1)
+#define NV_DPCD_STATUS_LANEX_SYMBOL_LOCKED_SHFIT	2
+#define NV_DPCD_STATUS_LANEX_SYMBOL_LOCKED_NO		(0x00000000 << 2)
+#define NV_DPCD_STATUS_LANEX_SYMBOL_LOCKED_YES		(0x00000001 << 2)
+#define NV_DPCD_STATUS_LANEXPLUS1_CR_DONE_SHIFT		4
+#define NV_DPCD_STATUS_LANEXPLUS1_CR_DONE_NO		(0x00000000 << 4)
+#define NV_DPCD_STATUS_LANEXPLUS1_CR_DONE_YES		(0x00000001 << 4)
+#define NV_DPCD_STATUS_LANEXPLUS1_CHN_EQ_DONE_SHIFT	5
+#define NV_DPCD_STATUS_LANEXPLUS1_CHN_EQ_DONE_NO	(0x00000000 << 5)
+#define NV_DPCD_STATUS_LANEXPLUS1_CHN_EQ_DONE_YES	(0x00000001 << 5)
+#define NV_DPCD_STATUS_LANEXPLUS1_SYMBOL_LOCKED_SHIFT	6
+#define NV_DPCD_STATUS_LANEXPLUS1_SYMBOL_LOCKED_NO	(0x00000000 << 6)
+#define NV_DPCD_STATUS_LANEXPLUS1_SYMBOL_LOCKED_YES	(0x00000001 << 6)
+
+#endif