drivers/gpu/drm/i915/display/intel_dp_aux_regs.h

/* SPDX-License-Identifier: MIT */
/*
 * Copyright © 2023 Intel Corporation
 */

#ifndef __INTEL_DP_AUX_REGS_H__
#define __INTEL_DP_AUX_REGS_H__

#include "intel_display_reg_defs.h"

/*
 * The aux channel provides a way to talk to the signal sink for DDC etc. Max
 * packet size supported is 20 bytes in each direction, hence the 5 fixed data
 * registers
 */

/*
 * Wrapper macro to convert from aux_ch to the index used in some of the
 * registers.
 */
#define __xe2lpd_aux_ch_idx(aux_ch)						\
	(aux_ch >= AUX_CH_USBC1 ? aux_ch : AUX_CH_USBC4 + 1 + (aux_ch) - AUX_CH_A)

#define _DPA_AUX_CH_CTL			0x64010
#define _DPB_AUX_CH_CTL			0x64110
#define _XELPDP_USBC1_AUX_CH_CTL	0x16f210
#define _XELPDP_USBC2_AUX_CH_CTL	0x16f410
#define DP_AUX_CH_CTL(aux_ch)		_MMIO_PORT(aux_ch, _DPA_AUX_CH_CTL,	\
						   _DPB_AUX_CH_CTL)
#define VLV_DP_AUX_CH_CTL(aux_ch)	_MMIO(VLV_DISPLAY_BASE + \
					      _PORT(aux_ch, _DPA_AUX_CH_CTL, _DPB_AUX_CH_CTL))
#define _XELPDP_DP_AUX_CH_CTL(aux_ch)						\
		_MMIO(_PICK_EVEN_2RANGES(aux_ch, AUX_CH_USBC1,			\
					 _DPA_AUX_CH_CTL, _DPB_AUX_CH_CTL,	\
					 _XELPDP_USBC1_AUX_CH_CTL,		\
					 _XELPDP_USBC2_AUX_CH_CTL))
#define XELPDP_DP_AUX_CH_CTL(i915__, aux_ch)					\
		(DISPLAY_VER(i915__) >= 20 ?					\
		 _XELPDP_DP_AUX_CH_CTL(__xe2lpd_aux_ch_idx(aux_ch)) :		\
		 _XELPDP_DP_AUX_CH_CTL(aux_ch))
#define   DP_AUX_CH_CTL_SEND_BUSY		REG_BIT(31)
#define   DP_AUX_CH_CTL_DONE			REG_BIT(30)
#define   DP_AUX_CH_CTL_INTERRUPT		REG_BIT(29)
#define   DP_AUX_CH_CTL_TIME_OUT_ERROR		REG_BIT(28)
#define   DP_AUX_CH_CTL_TIME_OUT_MASK		REG_GENMASK(27, 26)
#define   DP_AUX_CH_CTL_TIME_OUT_400us		REG_FIELD_PREP(DP_AUX_CH_CTL_TIME_OUT_MASK, 0)
#define   DP_AUX_CH_CTL_TIME_OUT_600us		REG_FIELD_PREP(DP_AUX_CH_CTL_TIME_OUT_MASK, 1)
#define   DP_AUX_CH_CTL_TIME_OUT_800us		REG_FIELD_PREP(DP_AUX_CH_CTL_TIME_OUT_MASK, 2)
#define   DP_AUX_CH_CTL_TIME_OUT_MAX		REG_FIELD_PREP(DP_AUX_CH_CTL_TIME_OUT_MASK, 3) /* Varies per platform */
#define   DP_AUX_CH_CTL_RECEIVE_ERROR		REG_BIT(25)
#define   DP_AUX_CH_CTL_MESSAGE_SIZE_MASK	REG_GENMASK(24, 20)
#define   DP_AUX_CH_CTL_MESSAGE_SIZE(x)		REG_FIELD_PREP(DP_AUX_CH_CTL_MESSAGE_SIZE_MASK, (x))
#define   DP_AUX_CH_CTL_PRECHARGE_2US_MASK	REG_GENMASK(19, 16) /* pre-skl */
#define   DP_AUX_CH_CTL_PRECHARGE_2US(x)	REG_FIELD_PREP(DP_AUX_CH_CTL_PRECHARGE_2US_MASK, (x))
#define   XELPDP_DP_AUX_CH_CTL_POWER_REQUEST	REG_BIT(19) /* mtl+ */
#define   XELPDP_DP_AUX_CH_CTL_POWER_STATUS	REG_BIT(18) /* mtl+ */
#define   DP_AUX_CH_CTL_AUX_AKSV_SELECT		REG_BIT(15)
#define   DP_AUX_CH_CTL_MANCHESTER_TEST		REG_BIT(14) /* pre-hsw */
#define   DP_AUX_CH_CTL_PSR_DATA_AUX_REG_SKL	REG_BIT(14) /* skl+ */
#define   DP_AUX_CH_CTL_SYNC_TEST		REG_BIT(13) /* pre-hsw */
#define   DP_AUX_CH_CTL_FS_DATA_AUX_REG_SKL	REG_BIT(13) /* skl+ */
#define   DP_AUX_CH_CTL_DEGLITCH_TEST		REG_BIT(12) /* pre-hsw */
#define   DP_AUX_CH_CTL_GTC_DATA_AUX_REG_SKL	REG_BIT(12) /* skl+ */
#define   DP_AUX_CH_CTL_PRECHARGE_TEST		REG_BIT(11) /* pre-hsw */
#define   DP_AUX_CH_CTL_TBT_IO			REG_BIT(11) /* icl+ */
#define   DP_AUX_CH_CTL_BIT_CLOCK_2X_MASK	REG_GENMASK(10, 0) /* pre-skl */
#define   DP_AUX_CH_CTL_BIT_CLOCK_2X(x)		REG_FIELD_PREP(DP_AUX_CH_CTL_BIT_CLOCK_2X_MASK, (x))
#define   DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL_MASK	REG_GENMASK(9, 5) /* skl+ */
#define   DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(c)	REG_FIELD_PREP(DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL_MASK, (c) - 1)
#define   DP_AUX_CH_CTL_SYNC_PULSE_SKL_MASK	REG_GENMASK(4, 0) /* skl+ */
#define   DP_AUX_CH_CTL_SYNC_PULSE_SKL(c)	REG_FIELD_PREP(DP_AUX_CH_CTL_SYNC_PULSE_SKL_MASK, (c) - 1)

#define _DPA_AUX_CH_DATA1		0x64014
#define _DPB_AUX_CH_DATA1		0x64114
#define _XELPDP_USBC1_AUX_CH_DATA1	0x16f214
#define _XELPDP_USBC2_AUX_CH_DATA1	0x16f414
#define DP_AUX_CH_DATA(aux_ch, i)	_MMIO(_PORT(aux_ch, _DPA_AUX_CH_DATA1,	\
						    _DPB_AUX_CH_DATA1) + (i) * 4) /* 5 registers */
#define VLV_DP_AUX_CH_DATA(aux_ch, i)	_MMIO(VLV_DISPLAY_BASE + _PORT(aux_ch, _DPA_AUX_CH_DATA1, \
								       _DPB_AUX_CH_DATA1) + (i) * 4) /* 5 registers */
#define _XELPDP_DP_AUX_CH_DATA(aux_ch, i)					\
		_MMIO(_PICK_EVEN_2RANGES(aux_ch, AUX_CH_USBC1,			\
					 _DPA_AUX_CH_DATA1, _DPB_AUX_CH_DATA1,	\
					 _XELPDP_USBC1_AUX_CH_DATA1,		\
					 _XELPDP_USBC2_AUX_CH_DATA1) + (i) * 4) /* 5 registers */
#define XELPDP_DP_AUX_CH_DATA(i915__, aux_ch, i)				\
		(DISPLAY_VER(i915__) >= 20 ?					\
		 _XELPDP_DP_AUX_CH_DATA(__xe2lpd_aux_ch_idx(aux_ch), i) :	\
		 _XELPDP_DP_AUX_CH_DATA(aux_ch, i))

/* PICA Power Well Control */
#define XE2LPD_PICA_PW_CTL			_MMIO(0x16fe04)
#define   XE2LPD_PICA_CTL_POWER_REQUEST		REG_BIT(31)
#define   XE2LPD_PICA_CTL_POWER_STATUS		REG_BIT(30)

#endif /* __INTEL_DP_AUX_REGS_H__ */