/*
 * Copyright © 2012 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Eugeni Dodonov <eugeni.dodonov@intel.com>
 *
 */

#include "i915_drv.h"
#include "intel_drv.h"

struct ddi_buf_trans {
        u32 trans1;     /* balance leg enable, de-emph level */
        u32 trans2;     /* vref sel, vswing */
        u8 i_boost;     /* SKL: I_boost; valid: 0x0, 0x1, 0x3, 0x7 */
};

static const u8 index_to_dp_signal_levels[] = {
        [0] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0,
        [1] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1,
        [2] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2,
        [3] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_3,
        [4] = DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0,
        [5] = DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1,
        [6] = DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2,
        [7] = DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0,
        [8] = DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1,
        [9] = DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0,
};

/* HDMI/DVI modes ignore everything but the last 2 items. So we share
 * them for both DP and FDI transports, allowing those ports to
 * automatically adapt to HDMI connections as well
 */
static const struct ddi_buf_trans hsw_ddi_translations_dp[] = {
        { 0x00FFFFFF, 0x0006000E, 0x0 },
        { 0x00D75FFF, 0x0005000A, 0x0 },
        { 0x00C30FFF, 0x00040006, 0x0 },
        { 0x80AAAFFF, 0x000B0000, 0x0 },
        { 0x00FFFFFF, 0x0005000A, 0x0 },
        { 0x00D75FFF, 0x000C0004, 0x0 },
        { 0x80C30FFF, 0x000B0000, 0x0 },
        { 0x00FFFFFF, 0x00040006, 0x0 },
        { 0x80D75FFF, 0x000B0000, 0x0 },
};

static const struct ddi_buf_trans hsw_ddi_translations_fdi[] = {
        { 0x00FFFFFF, 0x0007000E, 0x0 },
        { 0x00D75FFF, 0x000F000A, 0x0 },
        { 0x00C30FFF, 0x00060006, 0x0 },
        { 0x00AAAFFF, 0x001E0000, 0x0 },
        { 0x00FFFFFF, 0x000F000A, 0x0 },
        { 0x00D75FFF, 0x00160004, 0x0 },
        { 0x00C30FFF, 0x001E0000, 0x0 },
        { 0x00FFFFFF, 0x00060006, 0x0 },
        { 0x00D75FFF, 0x001E0000, 0x0 },
};

static const struct ddi_buf_trans hsw_ddi_translations_hdmi[] = {
                                        /* Idx  NT mV d T mV d  db      */
        { 0x00FFFFFF, 0x0006000E, 0x0 },/* 0:   400     400     0       */
        { 0x00E79FFF, 0x000E000C, 0x0 },/* 1:   400     500     2       */
        { 0x00D75FFF, 0x0005000A, 0x0 },/* 2:   400     600     3.5     */
        { 0x00FFFFFF, 0x0005000A, 0x0 },/* 3:   600     600     0       */
        { 0x00E79FFF, 0x001D0007, 0x0 },/* 4:   600     750     2       */
        { 0x00D75FFF, 0x000C0004, 0x0 },/* 5:   600     900     3.5     */
        { 0x00FFFFFF, 0x00040006, 0x0 },/* 6:   800     800     0       */
        { 0x80E79FFF, 0x00030002, 0x0 },/* 7:   800     1000    2       */
        { 0x00FFFFFF, 0x00140005, 0x0 },/* 8:   850     850     0       */
        { 0x00FFFFFF, 0x000C0004, 0x0 },/* 9:   900     900     0       */
        { 0x00FFFFFF, 0x001C0003, 0x0 },/* 10:  950     950     0       */
        { 0x80FFFFFF, 0x00030002, 0x0 },/* 11:  1000    1000    0       */
};

static const struct ddi_buf_trans bdw_ddi_translations_edp[] = {
        { 0x00FFFFFF, 0x00000012, 0x0 },
        { 0x00EBAFFF, 0x00020011, 0x0 },
        { 0x00C71FFF, 0x0006000F, 0x0 },
        { 0x00AAAFFF, 0x000E000A, 0x0 },
        { 0x00FFFFFF, 0x00020011, 0x0 },
        { 0x00DB6FFF, 0x0005000F, 0x0 },
        { 0x00BEEFFF, 0x000A000C, 0x0 },
        { 0x00FFFFFF, 0x0005000F, 0x0 },
        { 0x00DB6FFF, 0x000A000C, 0x0 },
};

static const struct ddi_buf_trans bdw_ddi_translations_dp[] = {
        { 0x00FFFFFF, 0x0007000E, 0x0 },
        { 0x00D75FFF, 0x000E000A, 0x0 },
        { 0x00BEFFFF, 0x00140006, 0x0 },
        { 0x80B2CFFF, 0x001B0002, 0x0 },
        { 0x00FFFFFF, 0x000E000A, 0x0 },
        { 0x00DB6FFF, 0x00160005, 0x0 },
        { 0x80C71FFF, 0x001A0002, 0x0 },
        { 0x00F7DFFF, 0x00180004, 0x0 },
        { 0x80D75FFF, 0x001B0002, 0x0 },
};

static const struct ddi_buf_trans bdw_ddi_translations_fdi[] = {
        { 0x00FFFFFF, 0x0001000E, 0x0 },
        { 0x00D75FFF, 0x0004000A, 0x0 },
        { 0x00C30FFF, 0x00070006, 0x0 },
        { 0x00AAAFFF, 0x000C0000, 0x0 },
        { 0x00FFFFFF, 0x0004000A, 0x0 },
        { 0x00D75FFF, 0x00090004, 0x0 },
        { 0x00C30FFF, 0x000C0000, 0x0 },
        { 0x00FFFFFF, 0x00070006, 0x0 },
        { 0x00D75FFF, 0x000C0000, 0x0 },
};

static const struct ddi_buf_trans bdw_ddi_translations_hdmi[] = {
                                        /* Idx  NT mV d T mV df db      */
        { 0x00FFFFFF, 0x0007000E, 0x0 },/* 0:   400     400     0       */
        { 0x00D75FFF, 0x000E000A, 0x0 },/* 1:   400     600     3.5     */
        { 0x00BEFFFF, 0x00140006, 0x0 },/* 2:   400     800     6       */
        { 0x00FFFFFF, 0x0009000D, 0x0 },/* 3:   450     450     0       */
        { 0x00FFFFFF, 0x000E000A, 0x0 },/* 4:   600     600     0       */
        { 0x00D7FFFF, 0x00140006, 0x0 },/* 5:   600     800     2.5     */
        { 0x80CB2FFF, 0x001B0002, 0x0 },/* 6:   600     1000    4.5     */
        { 0x00FFFFFF, 0x00140006, 0x0 },/* 7:   800     800     0       */
        { 0x80E79FFF, 0x001B0002, 0x0 },/* 8:   800     1000    2       */
        { 0x80FFFFFF, 0x001B0002, 0x0 },/* 9:   1000    1000    0       */
};

/* Skylake H and S */
static const struct ddi_buf_trans skl_ddi_translations_dp[] = {
        { 0x00002016, 0x000000A0, 0x0 },
        { 0x00005012, 0x0000009B, 0x0 },
        { 0x00007011, 0x00000088, 0x0 },
        { 0x80009010, 0x000000C0, 0x1 },
        { 0x00002016, 0x0000009B, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000C0, 0x1 },
        { 0x00002016, 0x000000DF, 0x0 },
        { 0x80005012, 0x000000C0, 0x1 },
};

/* Skylake U */
static const struct ddi_buf_trans skl_u_ddi_translations_dp[] = {
        { 0x0000201B, 0x000000A2, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000CD, 0x1 },
        { 0x80009010, 0x000000C0, 0x1 },
        { 0x0000201B, 0x0000009D, 0x0 },
        { 0x80005012, 0x000000C0, 0x1 },
        { 0x80007011, 0x000000C0, 0x1 },
        { 0x00002016, 0x00000088, 0x0 },
        { 0x80005012, 0x000000C0, 0x1 },
};

/* Skylake Y */
static const struct ddi_buf_trans skl_y_ddi_translations_dp[] = {
        { 0x00000018, 0x000000A2, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000CD, 0x3 },
        { 0x80009010, 0x000000C0, 0x3 },
        { 0x00000018, 0x0000009D, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
        { 0x80007011, 0x000000C0, 0x3 },
        { 0x00000018, 0x00000088, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
};

/* Kabylake H and S */
static const struct ddi_buf_trans kbl_ddi_translations_dp[] = {
        { 0x00002016, 0x000000A0, 0x0 },
        { 0x00005012, 0x0000009B, 0x0 },
        { 0x00007011, 0x00000088, 0x0 },
        { 0x80009010, 0x000000C0, 0x1 },
        { 0x00002016, 0x0000009B, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000C0, 0x1 },
        { 0x00002016, 0x00000097, 0x0 },
        { 0x80005012, 0x000000C0, 0x1 },
};

/* Kabylake U */
static const struct ddi_buf_trans kbl_u_ddi_translations_dp[] = {
        { 0x0000201B, 0x000000A1, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000CD, 0x3 },
        { 0x80009010, 0x000000C0, 0x3 },
        { 0x0000201B, 0x0000009D, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
        { 0x80007011, 0x000000C0, 0x3 },
        { 0x00002016, 0x0000004F, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
};

/* Kabylake Y */
static const struct ddi_buf_trans kbl_y_ddi_translations_dp[] = {
        { 0x00001017, 0x000000A1, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000CD, 0x3 },
        { 0x8000800F, 0x000000C0, 0x3 },
        { 0x00001017, 0x0000009D, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
        { 0x80007011, 0x000000C0, 0x3 },
        { 0x00001017, 0x0000004C, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
};

/*
 * Skylake/Kabylake H and S
 * eDP 1.4 low vswing translation parameters
 */
static const struct ddi_buf_trans skl_ddi_translations_edp[] = {
        { 0x00000018, 0x000000A8, 0x0 },
        { 0x00004013, 0x000000A9, 0x0 },
        { 0x00007011, 0x000000A2, 0x0 },
        { 0x00009010, 0x0000009C, 0x0 },
        { 0x00000018, 0x000000A9, 0x0 },
        { 0x00006013, 0x000000A2, 0x0 },
        { 0x00007011, 0x000000A6, 0x0 },
        { 0x00000018, 0x000000AB, 0x0 },
        { 0x00007013, 0x0000009F, 0x0 },
        { 0x00000018, 0x000000DF, 0x0 },
};

/*
 * Skylake/Kabylake U
 * eDP 1.4 low vswing translation parameters
 */
static const struct ddi_buf_trans skl_u_ddi_translations_edp[] = {
        { 0x00000018, 0x000000A8, 0x0 },
        { 0x00004013, 0x000000A9, 0x0 },
        { 0x00007011, 0x000000A2, 0x0 },
        { 0x00009010, 0x0000009C, 0x0 },
        { 0x00000018, 0x000000A9, 0x0 },
        { 0x00006013, 0x000000A2, 0x0 },
        { 0x00007011, 0x000000A6, 0x0 },
        { 0x00002016, 0x000000AB, 0x0 },
        { 0x00005013, 0x0000009F, 0x0 },
        { 0x00000018, 0x000000DF, 0x0 },
};

/*
 * Skylake/Kabylake Y
 * eDP 1.4 low vswing translation parameters
 */
static const struct ddi_buf_trans skl_y_ddi_translations_edp[] = {
        { 0x00000018, 0x000000A8, 0x0 },
        { 0x00004013, 0x000000AB, 0x0 },
        { 0x00007011, 0x000000A4, 0x0 },
        { 0x00009010, 0x000000DF, 0x0 },
        { 0x00000018, 0x000000AA, 0x0 },
        { 0x00006013, 0x000000A4, 0x0 },
        { 0x00007011, 0x0000009D, 0x0 },
        { 0x00000018, 0x000000A0, 0x0 },
        { 0x00006012, 0x000000DF, 0x0 },
        { 0x00000018, 0x0000008A, 0x0 },
};

/* Skylake/Kabylake U, H and S */
static const struct ddi_buf_trans skl_ddi_translations_hdmi[] = {
        { 0x00000018, 0x000000AC, 0x0 },
        { 0x00005012, 0x0000009D, 0x0 },
        { 0x00007011, 0x00000088, 0x0 },
        { 0x00000018, 0x000000A1, 0x0 },
        { 0x00000018, 0x00000098, 0x0 },
        { 0x00004013, 0x00000088, 0x0 },
        { 0x80006012, 0x000000CD, 0x1 },
        { 0x00000018, 0x000000DF, 0x0 },
        { 0x80003015, 0x000000CD, 0x1 },        /* Default */
        { 0x80003015, 0x000000C0, 0x1 },
        { 0x80000018, 0x000000C0, 0x1 },
};

/* Skylake/Kabylake Y */
static const struct ddi_buf_trans skl_y_ddi_translations_hdmi[] = {
        { 0x00000018, 0x000000A1, 0x0 },
        { 0x00005012, 0x000000DF, 0x0 },
        { 0x80007011, 0x000000CB, 0x3 },
        { 0x00000018, 0x000000A4, 0x0 },
        { 0x00000018, 0x0000009D, 0x0 },
        { 0x00004013, 0x00000080, 0x0 },
        { 0x80006013, 0x000000C0, 0x3 },
        { 0x00000018, 0x0000008A, 0x0 },
        { 0x80003015, 0x000000C0, 0x3 },        /* Default */
        { 0x80003015, 0x000000C0, 0x3 },
        { 0x80000018, 0x000000C0, 0x3 },
};

struct bxt_ddi_buf_trans {
        u32 margin;     /* swing value */
        u32 scale;      /* scale value */
        u32 enable;     /* scale enable */
        u32 deemphasis;
        bool default_index; /* true if the entry represents default value */
};

static const struct bxt_ddi_buf_trans bxt_ddi_translations_dp[] = {
                                        /* Idx  NT mV diff      db  */
        { 52,  0x9A, 0, 128, true  },   /* 0:   400             0   */
        { 78,  0x9A, 0, 85,  false },   /* 1:   400             3.5 */
        { 104, 0x9A, 0, 64,  false },   /* 2:   400             6   */
        { 154, 0x9A, 0, 43,  false },   /* 3:   400             9.5 */
        { 77,  0x9A, 0, 128, false },   /* 4:   600             0   */
        { 116, 0x9A, 0, 85,  false },   /* 5:   600             3.5 */
        { 154, 0x9A, 0, 64,  false },   /* 6:   600             6   */
        { 102, 0x9A, 0, 128, false },   /* 7:   800             0   */
        { 154, 0x9A, 0, 85,  false },   /* 8:   800             3.5 */
        { 154, 0x9A, 1, 128, false },   /* 9:   1200            0   */
};

static const struct bxt_ddi_buf_trans bxt_ddi_translations_edp[] = {
                                        /* Idx  NT mV diff      db  */
        { 26, 0, 0, 128, false },       /* 0:   200             0   */
        { 38, 0, 0, 112, false },       /* 1:   200             1.5 */
        { 48, 0, 0, 96,  false },       /* 2:   200             4   */
        { 54, 0, 0, 69,  false },       /* 3:   200             6   */
        { 32, 0, 0, 128, false },       /* 4:   250             0   */
        { 48, 0, 0, 104, false },       /* 5:   250             1.5 */
        { 54, 0, 0, 85,  false },       /* 6:   250             4   */
        { 43, 0, 0, 128, false },       /* 7:   300             0   */
        { 54, 0, 0, 101, false },       /* 8:   300             1.5 */
        { 48, 0, 0, 128, false },       /* 9:   300             0   */
};

/* BSpec has 2 recommended values - entries 0 and 8.
 * Using the entry with higher vswing.
 */
static const struct bxt_ddi_buf_trans bxt_ddi_translations_hdmi[] = {
                                        /* Idx  NT mV diff      db  */
        { 52,  0x9A, 0, 128, false },   /* 0:   400             0   */
        { 52,  0x9A, 0, 85,  false },   /* 1:   400             3.5 */
        { 52,  0x9A, 0, 64,  false },   /* 2:   400             6   */
        { 42,  0x9A, 0, 43,  false },   /* 3:   400             9.5 */
        { 77,  0x9A, 0, 128, false },   /* 4:   600             0   */
        { 77,  0x9A, 0, 85,  false },   /* 5:   600             3.5 */
        { 77,  0x9A, 0, 64,  false },   /* 6:   600             6   */
        { 102, 0x9A, 0, 128, false },   /* 7:   800             0   */
        { 102, 0x9A, 0, 85,  false },   /* 8:   800             3.5 */
        { 154, 0x9A, 1, 128, true },    /* 9:   1200            0   */
};

enum port intel_ddi_get_encoder_port(struct intel_encoder *encoder)
{
        switch (encoder->type) {
        case INTEL_OUTPUT_DP_MST:
                return enc_to_mst(&encoder->base)->primary->port;
        case INTEL_OUTPUT_DP:
        case INTEL_OUTPUT_EDP:
        case INTEL_OUTPUT_HDMI:
        case INTEL_OUTPUT_UNKNOWN:
                return enc_to_dig_port(&encoder->base)->port;
        case INTEL_OUTPUT_ANALOG:
                return PORT_E;
        default:
                MISSING_CASE(encoder->type);
                return PORT_A;
        }
}

static const struct ddi_buf_trans *
bdw_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
{
        if (dev_priv->vbt.edp.low_vswing) {
                *n_entries = ARRAY_SIZE(bdw_ddi_translations_edp);
                return bdw_ddi_translations_edp;
        } else {
                *n_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
                return bdw_ddi_translations_dp;
        }
}

static const struct ddi_buf_trans *
skl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
{
        if (IS_SKL_ULX(dev_priv)) {
                *n_entries = ARRAY_SIZE(skl_y_ddi_translations_dp);
                return skl_y_ddi_translations_dp;
        } else if (IS_SKL_ULT(dev_priv)) {
                *n_entries = ARRAY_SIZE(skl_u_ddi_translations_dp);
                return skl_u_ddi_translations_dp;
        } else {
                *n_entries = ARRAY_SIZE(skl_ddi_translations_dp);
                return skl_ddi_translations_dp;
        }
}

static const struct ddi_buf_trans *
kbl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
{
        if (IS_KBL_ULX(dev_priv)) {
                *n_entries = ARRAY_SIZE(kbl_y_ddi_translations_dp);
                return kbl_y_ddi_translations_dp;
        } else if (IS_KBL_ULT(dev_priv)) {
                *n_entries = ARRAY_SIZE(kbl_u_ddi_translations_dp);
                return kbl_u_ddi_translations_dp;
        } else {
                *n_entries = ARRAY_SIZE(kbl_ddi_translations_dp);
                return kbl_ddi_translations_dp;
        }
}

static const struct ddi_buf_trans *
skl_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
{
        if (dev_priv->vbt.edp.low_vswing) {
                if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
                        *n_entries = ARRAY_SIZE(skl_y_ddi_translations_edp);
                        return skl_y_ddi_translations_edp;
                } else if (IS_SKL_ULT(dev_priv) || IS_KBL_ULT(dev_priv)) {
                        *n_entries = ARRAY_SIZE(skl_u_ddi_translations_edp);
                        return skl_u_ddi_translations_edp;
                } else {
                        *n_entries = ARRAY_SIZE(skl_ddi_translations_edp);
                        return skl_ddi_translations_edp;
                }
        }

        if (IS_KABYLAKE(dev_priv))
                return kbl_get_buf_trans_dp(dev_priv, n_entries);
        else
                return skl_get_buf_trans_dp(dev_priv, n_entries);
}

static const struct ddi_buf_trans *
skl_get_buf_trans_hdmi(struct drm_i915_private *dev_priv, int *n_entries)
{
        if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
                *n_entries = ARRAY_SIZE(skl_y_ddi_translations_hdmi);
                return skl_y_ddi_translations_hdmi;
        } else {
                *n_entries = ARRAY_SIZE(skl_ddi_translations_hdmi);
                return skl_ddi_translations_hdmi;
        }
}

static int intel_ddi_hdmi_level(struct drm_i915_private *dev_priv, enum port port)
{
        int n_hdmi_entries;
        int hdmi_level;
        int hdmi_default_entry;

        hdmi_level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift;

        if (IS_GEN9_LP(dev_priv))
                return hdmi_level;

        if (IS_GEN9_BC(dev_priv)) {
                skl_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries);
                hdmi_default_entry = 8;
        } else if (IS_BROADWELL(dev_priv)) {
                n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
                hdmi_default_entry = 7;
        } else if (IS_HASWELL(dev_priv)) {
                n_hdmi_entries = ARRAY_SIZE(hsw_ddi_translations_hdmi);
                hdmi_default_entry = 6;
        } else {
                WARN(1, "ddi translation table missing\n");
                n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
                hdmi_default_entry = 7;
        }

        /* Choose a good default if VBT is badly populated */
        if (hdmi_level == HDMI_LEVEL_SHIFT_UNKNOWN ||
            hdmi_level >= n_hdmi_entries)
                hdmi_level = hdmi_default_entry;

        return hdmi_level;
}

static const struct ddi_buf_trans *
intel_ddi_get_buf_trans_dp(struct drm_i915_private *dev_priv,
                           int *n_entries)
{
        if (IS_KABYLAKE(dev_priv)) {
                return kbl_get_buf_trans_dp(dev_priv, n_entries);
        } else if (IS_SKYLAKE(dev_priv)) {
                return skl_get_buf_trans_dp(dev_priv, n_entries);
        } else if (IS_BROADWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
                return  bdw_ddi_translations_dp;
        } else if (IS_HASWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(hsw_ddi_translations_dp);
                return hsw_ddi_translations_dp;
        }

        *n_entries = 0;
        return NULL;
}

static const struct ddi_buf_trans *
intel_ddi_get_buf_trans_edp(struct drm_i915_private *dev_priv,
                            int *n_entries)
{
        if (IS_KABYLAKE(dev_priv) || IS_SKYLAKE(dev_priv)) {
                return skl_get_buf_trans_edp(dev_priv, n_entries);
        } else if (IS_BROADWELL(dev_priv)) {
                return bdw_get_buf_trans_edp(dev_priv, n_entries);
        } else if (IS_HASWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(hsw_ddi_translations_dp);
                return hsw_ddi_translations_dp;
        }

        *n_entries = 0;
        return NULL;
}

static const struct ddi_buf_trans *
intel_ddi_get_buf_trans_fdi(struct drm_i915_private *dev_priv,
                            int *n_entries)
{
        if (IS_BROADWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(hsw_ddi_translations_fdi);
                return hsw_ddi_translations_fdi;
        } else if (IS_HASWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(hsw_ddi_translations_fdi);
                return hsw_ddi_translations_fdi;
        }

        *n_entries = 0;
        return NULL;
}

/*
 * Starting with Haswell, DDI port buffers must be programmed with correct
 * values in advance. This function programs the correct values for
 * DP/eDP/FDI use cases.
 */
static void intel_prepare_dp_ddi_buffers(struct intel_encoder *encoder)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        u32 iboost_bit = 0;
        int i, n_entries;
        enum port port = intel_ddi_get_encoder_port(encoder);
        const struct ddi_buf_trans *ddi_translations;

        if (IS_GEN9_LP(dev_priv))
                return;

        switch (encoder->type) {
        case INTEL_OUTPUT_EDP:
                ddi_translations = intel_ddi_get_buf_trans_edp(dev_priv,
                                                               &n_entries);
                break;
        case INTEL_OUTPUT_DP:
                ddi_translations = intel_ddi_get_buf_trans_dp(dev_priv,
                                                              &n_entries);
                break;
        case INTEL_OUTPUT_ANALOG:
                ddi_translations = intel_ddi_get_buf_trans_fdi(dev_priv,
                                                               &n_entries);
                break;
        default:
                MISSING_CASE(encoder->type);
                return;
        }

        if (IS_GEN9_BC(dev_priv)) {
                /* If we're boosting the current, set bit 31 of trans1 */
                if (dev_priv->vbt.ddi_port_info[port].dp_boost_level)
                        iboost_bit = DDI_BUF_BALANCE_LEG_ENABLE;

                if (WARN_ON(encoder->type == INTEL_OUTPUT_EDP &&
                            port != PORT_A && port != PORT_E &&
                            n_entries > 9))
                        n_entries = 9;
        }

        for (i = 0; i < n_entries; i++) {
                I915_WRITE(DDI_BUF_TRANS_LO(port, i),
                           ddi_translations[i].trans1 | iboost_bit);
                I915_WRITE(DDI_BUF_TRANS_HI(port, i),
                           ddi_translations[i].trans2);
        }
}

/*
 * Starting with Haswell, DDI port buffers must be programmed with correct
 * values in advance. This function programs the correct values for
 * HDMI/DVI use cases.
 */
static void intel_prepare_hdmi_ddi_buffers(struct intel_encoder *encoder)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        u32 iboost_bit = 0;
        int n_hdmi_entries, hdmi_level;
        enum port port = intel_ddi_get_encoder_port(encoder);
        const struct ddi_buf_trans *ddi_translations_hdmi;

        if (IS_GEN9_LP(dev_priv))
                return;

        hdmi_level = intel_ddi_hdmi_level(dev_priv, port);

        if (IS_GEN9_BC(dev_priv)) {
                ddi_translations_hdmi = skl_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries);

                /* If we're boosting the current, set bit 31 of trans1 */
                if (dev_priv->vbt.ddi_port_info[port].hdmi_boost_level)
                        iboost_bit = DDI_BUF_BALANCE_LEG_ENABLE;
        } else if (IS_BROADWELL(dev_priv)) {
                ddi_translations_hdmi = bdw_ddi_translations_hdmi;
                n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
        } else if (IS_HASWELL(dev_priv)) {
                ddi_translations_hdmi = hsw_ddi_translations_hdmi;
                n_hdmi_entries = ARRAY_SIZE(hsw_ddi_translations_hdmi);
        } else {
                WARN(1, "ddi translation table missing\n");
                ddi_translations_hdmi = bdw_ddi_translations_hdmi;
                n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
        }

        /* Entry 9 is for HDMI: */
        I915_WRITE(DDI_BUF_TRANS_LO(port, 9),
                   ddi_translations_hdmi[hdmi_level].trans1 | iboost_bit);
        I915_WRITE(DDI_BUF_TRANS_HI(port, 9),
                   ddi_translations_hdmi[hdmi_level].trans2);
}

static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
                                    enum port port)
{
        i915_reg_t reg = DDI_BUF_CTL(port);
        int i;

        for (i = 0; i < 16; i++) {
                udelay(1);
                if (I915_READ(reg) & DDI_BUF_IS_IDLE)
                        return;
        }
        DRM_ERROR("Timeout waiting for DDI BUF %c idle bit\n", port_name(port));
}

static uint32_t hsw_pll_to_ddi_pll_sel(struct intel_shared_dpll *pll)
{
        switch (pll->id) {
        case DPLL_ID_WRPLL1:
                return PORT_CLK_SEL_WRPLL1;
        case DPLL_ID_WRPLL2:
                return PORT_CLK_SEL_WRPLL2;
        case DPLL_ID_SPLL:
                return PORT_CLK_SEL_SPLL;
        case DPLL_ID_LCPLL_810:
                return PORT_CLK_SEL_LCPLL_810;
        case DPLL_ID_LCPLL_1350:
                return PORT_CLK_SEL_LCPLL_1350;
        case DPLL_ID_LCPLL_2700:
                return PORT_CLK_SEL_LCPLL_2700;
        default:
                MISSING_CASE(pll->id);
                return PORT_CLK_SEL_NONE;
        }
}

/* Starting with Haswell, different DDI ports can work in FDI mode for
 * connection to the PCH-located connectors. For this, it is necessary to train
 * both the DDI port and PCH receiver for the desired DDI buffer settings.
 *
 * The recommended port to work in FDI mode is DDI E, which we use here. Also,
 * please note that when FDI mode is active on DDI E, it shares 2 lines with
 * DDI A (which is used for eDP)
 */

void hsw_fdi_link_train(struct intel_crtc *crtc,
                        const struct intel_crtc_state *crtc_state)
{
        struct drm_device *dev = crtc->base.dev;
        struct drm_i915_private *dev_priv = to_i915(dev);
        struct intel_encoder *encoder;
        u32 temp, i, rx_ctl_val, ddi_pll_sel;

        for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
                WARN_ON(encoder->type != INTEL_OUTPUT_ANALOG);
                intel_prepare_dp_ddi_buffers(encoder);
        }

        /* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed at the
         * mode set "sequence for CRT port" document:
         * - TP1 to TP2 time with the default value
         * - FDI delay to 90h
         *
         * WaFDIAutoLinkSetTimingOverrride:hsw
         */
        I915_WRITE(FDI_RX_MISC(PIPE_A), FDI_RX_PWRDN_LANE1_VAL(2) |
                                  FDI_RX_PWRDN_LANE0_VAL(2) |
                                  FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);

        /* Enable the PCH Receiver FDI PLL */
        rx_ctl_val = dev_priv->fdi_rx_config | FDI_RX_ENHANCE_FRAME_ENABLE |
                     FDI_RX_PLL_ENABLE |
                     FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
        I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
        POSTING_READ(FDI_RX_CTL(PIPE_A));
        udelay(220);

        /* Switch from Rawclk to PCDclk */
        rx_ctl_val |= FDI_PCDCLK;
        I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);

        /* Configure Port Clock Select */
        ddi_pll_sel = hsw_pll_to_ddi_pll_sel(crtc_state->shared_dpll);
        I915_WRITE(PORT_CLK_SEL(PORT_E), ddi_pll_sel);
        WARN_ON(ddi_pll_sel != PORT_CLK_SEL_SPLL);

        /* Start the training iterating through available voltages and emphasis,
         * testing each value twice. */
        for (i = 0; i < ARRAY_SIZE(hsw_ddi_translations_fdi) * 2; i++) {
                /* Configure DP_TP_CTL with auto-training */
                I915_WRITE(DP_TP_CTL(PORT_E),
                                        DP_TP_CTL_FDI_AUTOTRAIN |
                                        DP_TP_CTL_ENHANCED_FRAME_ENABLE |
                                        DP_TP_CTL_LINK_TRAIN_PAT1 |
                                        DP_TP_CTL_ENABLE);

                /* Configure and enable DDI_BUF_CTL for DDI E with next voltage.
                 * DDI E does not support port reversal, the functionality is
                 * achieved on the PCH side in FDI_RX_CTL, so no need to set the
                 * port reversal bit */
                I915_WRITE(DDI_BUF_CTL(PORT_E),
                           DDI_BUF_CTL_ENABLE |
                           ((crtc_state->fdi_lanes - 1) << 1) |
                           DDI_BUF_TRANS_SELECT(i / 2));
                POSTING_READ(DDI_BUF_CTL(PORT_E));

                udelay(600);

                /* Program PCH FDI Receiver TU */
                I915_WRITE(FDI_RX_TUSIZE1(PIPE_A), TU_SIZE(64));

                /* Enable PCH FDI Receiver with auto-training */
                rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO;
                I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
                POSTING_READ(FDI_RX_CTL(PIPE_A));

                /* Wait for FDI receiver lane calibration */
                udelay(30);

                /* Unset FDI_RX_MISC pwrdn lanes */
                temp = I915_READ(FDI_RX_MISC(PIPE_A));
                temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
                I915_WRITE(FDI_RX_MISC(PIPE_A), temp);
                POSTING_READ(FDI_RX_MISC(PIPE_A));

                /* Wait for FDI auto training time */
                udelay(5);

                temp = I915_READ(DP_TP_STATUS(PORT_E));
                if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) {
                        DRM_DEBUG_KMS("FDI link training done on step %d\n", i);
                        break;
                }

                /*
                 * Leave things enabled even if we failed to train FDI.
                 * Results in less fireworks from the state checker.
                 */
                if (i == ARRAY_SIZE(hsw_ddi_translations_fdi) * 2 - 1) {
                        DRM_ERROR("FDI link training failed!\n");
                        break;
                }

                rx_ctl_val &= ~FDI_RX_ENABLE;
                I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
                POSTING_READ(FDI_RX_CTL(PIPE_A));

                temp = I915_READ(DDI_BUF_CTL(PORT_E));
                temp &= ~DDI_BUF_CTL_ENABLE;
                I915_WRITE(DDI_BUF_CTL(PORT_E), temp);
                POSTING_READ(DDI_BUF_CTL(PORT_E));

                /* Disable DP_TP_CTL and FDI_RX_CTL and retry */
                temp = I915_READ(DP_TP_CTL(PORT_E));
                temp &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
                temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
                I915_WRITE(DP_TP_CTL(PORT_E), temp);
                POSTING_READ(DP_TP_CTL(PORT_E));

                intel_wait_ddi_buf_idle(dev_priv, PORT_E);

                /* Reset FDI_RX_MISC pwrdn lanes */
                temp = I915_READ(FDI_RX_MISC(PIPE_A));
                temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
                temp |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
                I915_WRITE(FDI_RX_MISC(PIPE_A), temp);
                POSTING_READ(FDI_RX_MISC(PIPE_A));
        }

        /* Enable normal pixel sending for FDI */
        I915_WRITE(DP_TP_CTL(PORT_E),
                   DP_TP_CTL_FDI_AUTOTRAIN |
                   DP_TP_CTL_LINK_TRAIN_NORMAL |
                   DP_TP_CTL_ENHANCED_FRAME_ENABLE |
                   DP_TP_CTL_ENABLE);
}

static void intel_ddi_init_dp_buf_reg(struct intel_encoder *encoder)
{
        struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
        struct intel_digital_port *intel_dig_port =
                enc_to_dig_port(&encoder->base);

        intel_dp->DP = intel_dig_port->saved_port_bits |
                DDI_BUF_CTL_ENABLE | DDI_BUF_TRANS_SELECT(0);
        intel_dp->DP |= DDI_PORT_WIDTH(intel_dp->lane_count);
}

static struct intel_encoder *
intel_ddi_get_crtc_encoder(struct intel_crtc *crtc)
{
        struct drm_device *dev = crtc->base.dev;
        struct intel_encoder *encoder, *ret = NULL;
        int num_encoders = 0;

        for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
                ret = encoder;
                num_encoders++;
        }

        if (num_encoders != 1)
                WARN(1, "%d encoders on crtc for pipe %c\n", num_encoders,
                     pipe_name(crtc->pipe));

        BUG_ON(ret == NULL);
        return ret;
}

/* Finds the only possible encoder associated with the given CRTC. */
struct intel_encoder *
intel_ddi_get_crtc_new_encoder(struct intel_crtc_state *crtc_state)
{
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct intel_encoder *ret = NULL;
        struct drm_atomic_state *state;
        struct drm_connector *connector;
        struct drm_connector_state *connector_state;
        int num_encoders = 0;
        int i;

        state = crtc_state->base.state;

        for_each_new_connector_in_state(state, connector, connector_state, i) {
                if (connector_state->crtc != crtc_state->base.crtc)
                        continue;

                ret = to_intel_encoder(connector_state->best_encoder);
                num_encoders++;
        }

        WARN(num_encoders != 1, "%d encoders on crtc for pipe %c\n", num_encoders,
             pipe_name(crtc->pipe));

        BUG_ON(ret == NULL);
        return ret;
}

#define LC_FREQ 2700

static int hsw_ddi_calc_wrpll_link(struct drm_i915_private *dev_priv,
                                   i915_reg_t reg)
{
        int refclk = LC_FREQ;
        int n, p, r;
        u32 wrpll;

        wrpll = I915_READ(reg);
        switch (wrpll & WRPLL_PLL_REF_MASK) {
        case WRPLL_PLL_SSC:
        case WRPLL_PLL_NON_SSC:
                /*
                 * We could calculate spread here, but our checking
                 * code only cares about 5% accuracy, and spread is a max of
                 * 0.5% downspread.
                 */
                refclk = 135;
                break;
        case WRPLL_PLL_LCPLL:
                refclk = LC_FREQ;
                break;
        default:
                WARN(1, "bad wrpll refclk\n");
                return 0;
        }

        r = wrpll & WRPLL_DIVIDER_REF_MASK;
        p = (wrpll & WRPLL_DIVIDER_POST_MASK) >> WRPLL_DIVIDER_POST_SHIFT;
        n = (wrpll & WRPLL_DIVIDER_FB_MASK) >> WRPLL_DIVIDER_FB_SHIFT;

        /* Convert to KHz, p & r have a fixed point portion */
        return (refclk * n * 100) / (p * r);
}

static int skl_calc_wrpll_link(struct drm_i915_private *dev_priv,
                               uint32_t dpll)
{
        i915_reg_t cfgcr1_reg, cfgcr2_reg;
        uint32_t cfgcr1_val, cfgcr2_val;
        uint32_t p0, p1, p2, dco_freq;

        cfgcr1_reg = DPLL_CFGCR1(dpll);
        cfgcr2_reg = DPLL_CFGCR2(dpll);

        cfgcr1_val = I915_READ(cfgcr1_reg);
        cfgcr2_val = I915_READ(cfgcr2_reg);

        p0 = cfgcr2_val & DPLL_CFGCR2_PDIV_MASK;
        p2 = cfgcr2_val & DPLL_CFGCR2_KDIV_MASK;

        if (cfgcr2_val &  DPLL_CFGCR2_QDIV_MODE(1))
                p1 = (cfgcr2_val & DPLL_CFGCR2_QDIV_RATIO_MASK) >> 8;
        else
                p1 = 1;


        switch (p0) {
        case DPLL_CFGCR2_PDIV_1:
                p0 = 1;
                break;
        case DPLL_CFGCR2_PDIV_2:
                p0 = 2;
                break;
        case DPLL_CFGCR2_PDIV_3:
                p0 = 3;
                break;
        case DPLL_CFGCR2_PDIV_7:
                p0 = 7;
                break;
        }

        switch (p2) {
        case DPLL_CFGCR2_KDIV_5:
                p2 = 5;
                break;
        case DPLL_CFGCR2_KDIV_2:
                p2 = 2;
                break;
        case DPLL_CFGCR2_KDIV_3:
                p2 = 3;
                break;
        case DPLL_CFGCR2_KDIV_1:
                p2 = 1;
                break;
        }

        dco_freq = (cfgcr1_val & DPLL_CFGCR1_DCO_INTEGER_MASK) * 24 * 1000;

        dco_freq += (((cfgcr1_val & DPLL_CFGCR1_DCO_FRACTION_MASK) >> 9) * 24 *
                1000) / 0x8000;

        return dco_freq / (p0 * p1 * p2 * 5);
}

static void ddi_dotclock_get(struct intel_crtc_state *pipe_config)
{
        int dotclock;

        if (pipe_config->has_pch_encoder)
                dotclock = intel_dotclock_calculate(pipe_config->port_clock,
                                                    &pipe_config->fdi_m_n);
        else if (intel_crtc_has_dp_encoder(pipe_config))
                dotclock = intel_dotclock_calculate(pipe_config->port_clock,
                                                    &pipe_config->dp_m_n);
        else if (pipe_config->has_hdmi_sink && pipe_config->pipe_bpp == 36)
                dotclock = pipe_config->port_clock * 2 / 3;
        else
                dotclock = pipe_config->port_clock;

        if (pipe_config->pixel_multiplier)
                dotclock /= pipe_config->pixel_multiplier;

        pipe_config->base.adjusted_mode.crtc_clock = dotclock;
}

static void skl_ddi_clock_get(struct intel_encoder *encoder,
                                struct intel_crtc_state *pipe_config)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        int link_clock = 0;
        uint32_t dpll_ctl1, dpll;

        dpll = intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll);

        dpll_ctl1 = I915_READ(DPLL_CTRL1);

        if (dpll_ctl1 & DPLL_CTRL1_HDMI_MODE(dpll)) {
                link_clock = skl_calc_wrpll_link(dev_priv, dpll);
        } else {
                link_clock = dpll_ctl1 & DPLL_CTRL1_LINK_RATE_MASK(dpll);

                link_clock >>= DPLL_CTRL1_LINK_RATE_SHIFT(dpll);

                switch (link_clock) {
                case DPLL_CTRL1_LINK_RATE_810:
                        link_clock = 81000;
                        break;
                case DPLL_CTRL1_LINK_RATE_1080:
                        link_clock = 108000;
                        break;
                case DPLL_CTRL1_LINK_RATE_1350:
                        link_clock = 135000;
                        break;
                case DPLL_CTRL1_LINK_RATE_1620:
                        link_clock = 162000;
                        break;
                case DPLL_CTRL1_LINK_RATE_2160:
                        link_clock = 216000;
                        break;
                case DPLL_CTRL1_LINK_RATE_2700:
                        link_clock = 270000;
                        break;
                default:
                        WARN(1, "Unsupported link rate\n");
                        break;
                }
                link_clock *= 2;
        }

        pipe_config->port_clock = link_clock;

        ddi_dotclock_get(pipe_config);
}

static void hsw_ddi_clock_get(struct intel_encoder *encoder,
                              struct intel_crtc_state *pipe_config)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        int link_clock = 0;
        u32 val, pll;

        val = hsw_pll_to_ddi_pll_sel(pipe_config->shared_dpll);
        switch (val & PORT_CLK_SEL_MASK) {
        case PORT_CLK_SEL_LCPLL_810:
                link_clock = 81000;
                break;
        case PORT_CLK_SEL_LCPLL_1350:
                link_clock = 135000;
                break;
        case PORT_CLK_SEL_LCPLL_2700:
                link_clock = 270000;
                break;
        case PORT_CLK_SEL_WRPLL1:
                link_clock = hsw_ddi_calc_wrpll_link(dev_priv, WRPLL_CTL(0));
                break;
        case PORT_CLK_SEL_WRPLL2:
                link_clock = hsw_ddi_calc_wrpll_link(dev_priv, WRPLL_CTL(1));
                break;
        case PORT_CLK_SEL_SPLL:
                pll = I915_READ(SPLL_CTL) & SPLL_PLL_FREQ_MASK;
                if (pll == SPLL_PLL_FREQ_810MHz)
                        link_clock = 81000;
                else if (pll == SPLL_PLL_FREQ_1350MHz)
                        link_clock = 135000;
                else if (pll == SPLL_PLL_FREQ_2700MHz)
                        link_clock = 270000;
                else {
                        WARN(1, "bad spll freq\n");
                        return;
                }
                break;
        default:
                WARN(1, "bad port clock sel\n");
                return;
        }

        pipe_config->port_clock = link_clock * 2;

        ddi_dotclock_get(pipe_config);
}

static int bxt_calc_pll_link(struct drm_i915_private *dev_priv,
                                enum intel_dpll_id dpll)
{
        struct intel_shared_dpll *pll;
        struct intel_dpll_hw_state *state;
        struct dpll clock;

        /* For DDI ports we always use a shared PLL. */
        if (WARN_ON(dpll == DPLL_ID_PRIVATE))
                return 0;

        pll = &dev_priv->shared_dplls[dpll];
        state = &pll->state.hw_state;

        clock.m1 = 2;
        clock.m2 = (state->pll0 & PORT_PLL_M2_MASK) << 22;
        if (state->pll3 & PORT_PLL_M2_FRAC_ENABLE)
                clock.m2 |= state->pll2 & PORT_PLL_M2_FRAC_MASK;
        clock.n = (state->pll1 & PORT_PLL_N_MASK) >> PORT_PLL_N_SHIFT;
        clock.p1 = (state->ebb0 & PORT_PLL_P1_MASK) >> PORT_PLL_P1_SHIFT;
        clock.p2 = (state->ebb0 & PORT_PLL_P2_MASK) >> PORT_PLL_P2_SHIFT;

        return chv_calc_dpll_params(100000, &clock);
}

static void bxt_ddi_clock_get(struct intel_encoder *encoder,
                                struct intel_crtc_state *pipe_config)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = intel_ddi_get_encoder_port(encoder);
        uint32_t dpll = port;

        pipe_config->port_clock = bxt_calc_pll_link(dev_priv, dpll);

        ddi_dotclock_get(pipe_config);
}

void intel_ddi_clock_get(struct intel_encoder *encoder,
                         struct intel_crtc_state *pipe_config)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);

        if (INTEL_GEN(dev_priv) <= 8)
                hsw_ddi_clock_get(encoder, pipe_config);
        else if (IS_GEN9_BC(dev_priv))
                skl_ddi_clock_get(encoder, pipe_config);
        else if (IS_GEN9_LP(dev_priv))
                bxt_ddi_clock_get(encoder, pipe_config);
}

void intel_ddi_set_pipe_settings(const struct intel_crtc_state *crtc_state)
{
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        struct intel_encoder *encoder = intel_ddi_get_crtc_encoder(crtc);
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
        int type = encoder->type;
        uint32_t temp;

        if (type == INTEL_OUTPUT_DP || type == INTEL_OUTPUT_EDP || type == INTEL_OUTPUT_DP_MST) {
                WARN_ON(transcoder_is_dsi(cpu_transcoder));

                temp = TRANS_MSA_SYNC_CLK;
                switch (crtc_state->pipe_bpp) {
                case 18:
                        temp |= TRANS_MSA_6_BPC;
                        break;
                case 24:
                        temp |= TRANS_MSA_8_BPC;
                        break;
                case 30:
                        temp |= TRANS_MSA_10_BPC;
                        break;
                case 36:
                        temp |= TRANS_MSA_12_BPC;
                        break;
                default:
                        BUG();
                }
                I915_WRITE(TRANS_MSA_MISC(cpu_transcoder), temp);
        }
}

void intel_ddi_set_vc_payload_alloc(const struct intel_crtc_state *crtc_state,
                                    bool state)
{
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
        uint32_t temp;
        temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
        if (state == true)
                temp |= TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
        else
                temp &= ~TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
        I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), temp);
}

void intel_ddi_enable_transcoder_func(const struct intel_crtc_state *crtc_state)
{
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct intel_encoder *encoder = intel_ddi_get_crtc_encoder(crtc);
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        enum pipe pipe = crtc->pipe;
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
        enum port port = intel_ddi_get_encoder_port(encoder);
        int type = encoder->type;
        uint32_t temp;

        /* Enable TRANS_DDI_FUNC_CTL for the pipe to work in HDMI mode */
        temp = TRANS_DDI_FUNC_ENABLE;
        temp |= TRANS_DDI_SELECT_PORT(port);

        switch (crtc_state->pipe_bpp) {
        case 18:
                temp |= TRANS_DDI_BPC_6;
                break;
        case 24:
                temp |= TRANS_DDI_BPC_8;
                break;
        case 30:
                temp |= TRANS_DDI_BPC_10;
                break;
        case 36:
                temp |= TRANS_DDI_BPC_12;
                break;
        default:
                BUG();
        }

        if (crtc_state->base.adjusted_mode.flags & DRM_MODE_FLAG_PVSYNC)
                temp |= TRANS_DDI_PVSYNC;
        if (crtc_state->base.adjusted_mode.flags & DRM_MODE_FLAG_PHSYNC)
                temp |= TRANS_DDI_PHSYNC;

        if (cpu_transcoder == TRANSCODER_EDP) {
                switch (pipe) {
                case PIPE_A:
                        /* On Haswell, can only use the always-on power well for
                         * eDP when not using the panel fitter, and when not
                         * using motion blur mitigation (which we don't
                         * support). */
                        if (IS_HASWELL(dev_priv) &&
                            (crtc_state->pch_pfit.enabled ||
                             crtc_state->pch_pfit.force_thru))
                                temp |= TRANS_DDI_EDP_INPUT_A_ONOFF;
                        else
                                temp |= TRANS_DDI_EDP_INPUT_A_ON;
                        break;
                case PIPE_B:
                        temp |= TRANS_DDI_EDP_INPUT_B_ONOFF;
                        break;
                case PIPE_C:
                        temp |= TRANS_DDI_EDP_INPUT_C_ONOFF;
                        break;
                default:
                        BUG();
                        break;
                }
        }

        if (type == INTEL_OUTPUT_HDMI) {
                if (crtc_state->has_hdmi_sink)
                        temp |= TRANS_DDI_MODE_SELECT_HDMI;
                else
                        temp |= TRANS_DDI_MODE_SELECT_DVI;

                if (crtc_state->hdmi_scrambling)
                        temp |= TRANS_DDI_HDMI_SCRAMBLING_MASK;
                if (crtc_state->hdmi_high_tmds_clock_ratio)
                        temp |= TRANS_DDI_HIGH_TMDS_CHAR_RATE;
        } else if (type == INTEL_OUTPUT_ANALOG) {
                temp |= TRANS_DDI_MODE_SELECT_FDI;
                temp |= (crtc_state->fdi_lanes - 1) << 1;
        } else if (type == INTEL_OUTPUT_DP ||
                   type == INTEL_OUTPUT_EDP) {
                temp |= TRANS_DDI_MODE_SELECT_DP_SST;
                temp |= DDI_PORT_WIDTH(crtc_state->lane_count);
        } else if (type == INTEL_OUTPUT_DP_MST) {
                temp |= TRANS_DDI_MODE_SELECT_DP_MST;
                temp |= DDI_PORT_WIDTH(crtc_state->lane_count);
        } else {
                WARN(1, "Invalid encoder type %d for pipe %c\n",
                     encoder->type, pipe_name(pipe));
        }

        I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), temp);
}

void intel_ddi_disable_transcoder_func(struct drm_i915_private *dev_priv,
                                       enum transcoder cpu_transcoder)
{
        i915_reg_t reg = TRANS_DDI_FUNC_CTL(cpu_transcoder);
        uint32_t val = I915_READ(reg);

        val &= ~(TRANS_DDI_FUNC_ENABLE | TRANS_DDI_PORT_MASK | TRANS_DDI_DP_VC_PAYLOAD_ALLOC);
        val |= TRANS_DDI_PORT_NONE;
        I915_WRITE(reg, val);
}

bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector)
{
        struct drm_device *dev = intel_connector->base.dev;
        struct drm_i915_private *dev_priv = to_i915(dev);
        struct intel_encoder *encoder = intel_connector->encoder;
        int type = intel_connector->base.connector_type;
        enum port port = intel_ddi_get_encoder_port(encoder);
        enum pipe pipe = 0;
        enum transcoder cpu_transcoder;
        uint32_t tmp;
        bool ret;

        if (!intel_display_power_get_if_enabled(dev_priv,
                                                encoder->power_domain))
                return false;

        if (!encoder->get_hw_state(encoder, &pipe)) {
                ret = false;
                goto out;
        }

        if (port == PORT_A)
                cpu_transcoder = TRANSCODER_EDP;
        else
                cpu_transcoder = (enum transcoder) pipe;

        tmp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));

        switch (tmp & TRANS_DDI_MODE_SELECT_MASK) {
        case TRANS_DDI_MODE_SELECT_HDMI:
        case TRANS_DDI_MODE_SELECT_DVI:
                ret = type == DRM_MODE_CONNECTOR_HDMIA;
                break;

        case TRANS_DDI_MODE_SELECT_DP_SST:
                ret = type == DRM_MODE_CONNECTOR_eDP ||
                      type == DRM_MODE_CONNECTOR_DisplayPort;
                break;

        case TRANS_DDI_MODE_SELECT_DP_MST:
                /* if the transcoder is in MST state then
                 * connector isn't connected */
                ret = false;
                break;

        case TRANS_DDI_MODE_SELECT_FDI:
                ret = type == DRM_MODE_CONNECTOR_VGA;
                break;

        default:
                ret = false;
                break;
        }

out:
        intel_display_power_put(dev_priv, encoder->power_domain);

        return ret;
}

bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
                            enum pipe *pipe)
{
        struct drm_device *dev = encoder->base.dev;
        struct drm_i915_private *dev_priv = to_i915(dev);
        enum port port = intel_ddi_get_encoder_port(encoder);
        u32 tmp;
        int i;
        bool ret;

        if (!intel_display_power_get_if_enabled(dev_priv,
                                                encoder->power_domain))
                return false;

        ret = false;

        tmp = I915_READ(DDI_BUF_CTL(port));

        if (!(tmp & DDI_BUF_CTL_ENABLE))
                goto out;

        if (port == PORT_A) {
                tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));

                switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
                case TRANS_DDI_EDP_INPUT_A_ON:
                case TRANS_DDI_EDP_INPUT_A_ONOFF:
                        *pipe = PIPE_A;
                        break;
                case TRANS_DDI_EDP_INPUT_B_ONOFF:
                        *pipe = PIPE_B;
                        break;
                case TRANS_DDI_EDP_INPUT_C_ONOFF:
                        *pipe = PIPE_C;
                        break;
                }

                ret = true;

                goto out;
        }

        for (i = TRANSCODER_A; i <= TRANSCODER_C; i++) {
                tmp = I915_READ(TRANS_DDI_FUNC_CTL(i));

                if ((tmp & TRANS_DDI_PORT_MASK) == TRANS_DDI_SELECT_PORT(port)) {
                        if ((tmp & TRANS_DDI_MODE_SELECT_MASK) ==
                            TRANS_DDI_MODE_SELECT_DP_MST)
                                goto out;

                        *pipe = i;
                        ret = true;

                        goto out;
                }
        }

        DRM_DEBUG_KMS("No pipe for ddi port %c found\n", port_name(port));

out:
        if (ret && IS_GEN9_LP(dev_priv)) {
                tmp = I915_READ(BXT_PHY_CTL(port));
                if ((tmp & (BXT_PHY_LANE_POWERDOWN_ACK |
                            BXT_PHY_LANE_ENABLED)) != BXT_PHY_LANE_ENABLED)
                        DRM_ERROR("Port %c enabled but PHY powered down? "
                                  "(PHY_CTL %08x)\n", port_name(port), tmp);
        }

        intel_display_power_put(dev_priv, encoder->power_domain);

        return ret;
}

static u64 intel_ddi_get_power_domains(struct intel_encoder *encoder)
{
        struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
        enum pipe pipe;

        if (intel_ddi_get_hw_state(encoder, &pipe))
                return BIT_ULL(dig_port->ddi_io_power_domain);

        return 0;
}

void intel_ddi_enable_pipe_clock(const struct intel_crtc_state *crtc_state)
{
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        struct intel_encoder *encoder = intel_ddi_get_crtc_encoder(crtc);
        enum port port = intel_ddi_get_encoder_port(encoder);
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;

        if (cpu_transcoder != TRANSCODER_EDP)
                I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
                           TRANS_CLK_SEL_PORT(port));
}

void intel_ddi_disable_pipe_clock(const struct intel_crtc_state *crtc_state)
{
        struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;

        if (cpu_transcoder != TRANSCODER_EDP)
                I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
                           TRANS_CLK_SEL_DISABLED);
}

static void _skl_ddi_set_iboost(struct drm_i915_private *dev_priv,
                                enum port port, uint8_t iboost)
{
        u32 tmp;

        tmp = I915_READ(DISPIO_CR_TX_BMU_CR0);
        tmp &= ~(BALANCE_LEG_MASK(port) | BALANCE_LEG_DISABLE(port));
        if (iboost)
                tmp |= iboost << BALANCE_LEG_SHIFT(port);
        else
                tmp |= BALANCE_LEG_DISABLE(port);
        I915_WRITE(DISPIO_CR_TX_BMU_CR0, tmp);
}

static void skl_ddi_set_iboost(struct intel_encoder *encoder, u32 level)
{
        struct intel_digital_port *intel_dig_port = enc_to_dig_port(&encoder->base);
        struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
        enum port port = intel_dig_port->port;
        int type = encoder->type;
        const struct ddi_buf_trans *ddi_translations;
        uint8_t iboost;
        uint8_t dp_iboost, hdmi_iboost;
        int n_entries;

        /* VBT may override standard boost values */
        dp_iboost = dev_priv->vbt.ddi_port_info[port].dp_boost_level;
        hdmi_iboost = dev_priv->vbt.ddi_port_info[port].hdmi_boost_level;

        if (type == INTEL_OUTPUT_DP) {
                if (dp_iboost) {
                        iboost = dp_iboost;
                } else {
                        if (IS_KABYLAKE(dev_priv))
                                ddi_translations = kbl_get_buf_trans_dp(dev_priv,
                                                                        &n_entries);
                        else
                                ddi_translations = skl_get_buf_trans_dp(dev_priv,
                                                                        &n_entries);
                        iboost = ddi_translations[level].i_boost;
                }
        } else if (type == INTEL_OUTPUT_EDP) {
                if (dp_iboost) {
                        iboost = dp_iboost;
                } else {
                        ddi_translations = skl_get_buf_trans_edp(dev_priv, &n_entries);

                        if (WARN_ON(port != PORT_A &&
                                    port != PORT_E && n_entries > 9))
                                n_entries = 9;

                        iboost = ddi_translations[level].i_boost;
                }
        } else if (type == INTEL_OUTPUT_HDMI) {
                if (hdmi_iboost) {
                        iboost = hdmi_iboost;
                } else {
                        ddi_translations = skl_get_buf_trans_hdmi(dev_priv, &n_entries);
                        iboost = ddi_translations[level].i_boost;
                }
        } else {
                return;
        }

        /* Make sure that the requested I_boost is valid */
        if (iboost && iboost != 0x1 && iboost != 0x3 && iboost != 0x7) {
                DRM_ERROR("Invalid I_boost value %u\n", iboost);
                return;
        }

        _skl_ddi_set_iboost(dev_priv, port, iboost);

        if (port == PORT_A && intel_dig_port->max_lanes == 4)
                _skl_ddi_set_iboost(dev_priv, PORT_E, iboost);
}

static void bxt_ddi_vswing_sequence(struct drm_i915_private *dev_priv,
                                    u32 level, enum port port, int type)
{
        const struct bxt_ddi_buf_trans *ddi_translations;
        u32 n_entries, i;

        if (type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.low_vswing) {
                n_entries = ARRAY_SIZE(bxt_ddi_translations_edp);
                ddi_translations = bxt_ddi_translations_edp;
        } else if (type == INTEL_OUTPUT_DP
                        || type == INTEL_OUTPUT_EDP) {
                n_entries = ARRAY_SIZE(bxt_ddi_translations_dp);
                ddi_translations = bxt_ddi_translations_dp;
        } else if (type == INTEL_OUTPUT_HDMI) {
                n_entries = ARRAY_SIZE(bxt_ddi_translations_hdmi);
                ddi_translations = bxt_ddi_translations_hdmi;
        } else {
                DRM_DEBUG_KMS("Vswing programming not done for encoder %d\n",
                                type);
                return;
        }

        /* Check if default value has to be used */
        if (level >= n_entries ||
            (type == INTEL_OUTPUT_HDMI && level == HDMI_LEVEL_SHIFT_UNKNOWN)) {
                for (i = 0; i < n_entries; i++) {
                        if (ddi_translations[i].default_index) {
                                level = i;
                                break;
                        }
                }
        }

        bxt_ddi_phy_set_signal_level(dev_priv, port,
                                     ddi_translations[level].margin,
                                     ddi_translations[level].scale,
                                     ddi_translations[level].enable,
                                     ddi_translations[level].deemphasis);
}

u8 intel_ddi_dp_voltage_max(struct intel_encoder *encoder)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        int n_entries;

        if (encoder->type == INTEL_OUTPUT_EDP)
                intel_ddi_get_buf_trans_edp(dev_priv, &n_entries);
        else
                intel_ddi_get_buf_trans_dp(dev_priv, &n_entries);

        if (WARN_ON(n_entries < 1))
                n_entries = 1;
        if (WARN_ON(n_entries > ARRAY_SIZE(index_to_dp_signal_levels)))
                n_entries = ARRAY_SIZE(index_to_dp_signal_levels);

        return index_to_dp_signal_levels[n_entries - 1] &
                DP_TRAIN_VOLTAGE_SWING_MASK;
}

static uint32_t translate_signal_level(int signal_levels)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(index_to_dp_signal_levels); i++) {
                if (index_to_dp_signal_levels[i] == signal_levels)
                        return i;
        }

        WARN(1, "Unsupported voltage swing/pre-emphasis level: 0x%x\n",
             signal_levels);

        return 0;
}

uint32_t ddi_signal_levels(struct intel_dp *intel_dp)
{
        struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
        struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
        struct intel_encoder *encoder = &dport->base;
        uint8_t train_set = intel_dp->train_set[0];
        int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
                                         DP_TRAIN_PRE_EMPHASIS_MASK);
        enum port port = dport->port;
        uint32_t level;

        level = translate_signal_level(signal_levels);

        if (IS_GEN9_BC(dev_priv))
                skl_ddi_set_iboost(encoder, level);
        else if (IS_GEN9_LP(dev_priv))
                bxt_ddi_vswing_sequence(dev_priv, level, port, encoder->type);

        return DDI_BUF_TRANS_SELECT(level);
}

static void intel_ddi_clk_select(struct intel_encoder *encoder,
                                 struct intel_shared_dpll *pll)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = intel_ddi_get_encoder_port(encoder);

        if (WARN_ON(!pll))
                return;

        if (IS_GEN9_BC(dev_priv)) {
                uint32_t val;

                /* DDI -> PLL mapping  */
                val = I915_READ(DPLL_CTRL2);

                val &= ~(DPLL_CTRL2_DDI_CLK_OFF(port) |
                        DPLL_CTRL2_DDI_CLK_SEL_MASK(port));
                val |= (DPLL_CTRL2_DDI_CLK_SEL(pll->id, port) |
                        DPLL_CTRL2_DDI_SEL_OVERRIDE(port));

                I915_WRITE(DPLL_CTRL2, val);

        } else if (INTEL_INFO(dev_priv)->gen < 9) {
                I915_WRITE(PORT_CLK_SEL(port), hsw_pll_to_ddi_pll_sel(pll));
        }
}

static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
                                    int link_rate, uint32_t lane_count,
                                    struct intel_shared_dpll *pll,
                                    bool link_mst)
{
        struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = intel_ddi_get_encoder_port(encoder);
        struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);

        WARN_ON(link_mst && (port == PORT_A || port == PORT_E));

        intel_dp_set_link_params(intel_dp, link_rate, lane_count,
                                 link_mst);
        if (encoder->type == INTEL_OUTPUT_EDP)
                intel_edp_panel_on(intel_dp);

        intel_ddi_clk_select(encoder, pll);

        intel_display_power_get(dev_priv, dig_port->ddi_io_power_domain);

        intel_prepare_dp_ddi_buffers(encoder);
        intel_ddi_init_dp_buf_reg(encoder);
        intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
        intel_dp_start_link_train(intel_dp);
        if (port != PORT_A || INTEL_GEN(dev_priv) >= 9)
                intel_dp_stop_link_train(intel_dp);
}

static void intel_ddi_pre_enable_hdmi(struct intel_encoder *encoder,
                                      bool has_hdmi_sink,
                                      const struct intel_crtc_state *crtc_state,
                                      const struct drm_connector_state *conn_state,
                                      struct intel_shared_dpll *pll)
{
        struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        struct drm_encoder *drm_encoder = &encoder->base;
        enum port port = intel_ddi_get_encoder_port(encoder);
        int level = intel_ddi_hdmi_level(dev_priv, port);
        struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);

        intel_dp_dual_mode_set_tmds_output(intel_hdmi, true);
        intel_ddi_clk_select(encoder, pll);

        intel_display_power_get(dev_priv, dig_port->ddi_io_power_domain);

        intel_prepare_hdmi_ddi_buffers(encoder);
        if (IS_GEN9_BC(dev_priv))
                skl_ddi_set_iboost(encoder, level);
        else if (IS_GEN9_LP(dev_priv))
                bxt_ddi_vswing_sequence(dev_priv, level, port,
                                        INTEL_OUTPUT_HDMI);

        intel_hdmi->set_infoframes(drm_encoder,
                                   has_hdmi_sink,
                                   crtc_state, conn_state);
}

static void intel_ddi_pre_enable(struct intel_encoder *encoder,
                                 struct intel_crtc_state *pipe_config,
                                 struct drm_connector_state *conn_state)
{
        int type = encoder->type;

        if (type == INTEL_OUTPUT_DP || type == INTEL_OUTPUT_EDP) {
                intel_ddi_pre_enable_dp(encoder,
                                        pipe_config->port_clock,
                                        pipe_config->lane_count,
                                        pipe_config->shared_dpll,
                                        intel_crtc_has_type(pipe_config,
                                                            INTEL_OUTPUT_DP_MST));
        }
        if (type == INTEL_OUTPUT_HDMI) {
                intel_ddi_pre_enable_hdmi(encoder,
                                          pipe_config->has_hdmi_sink,
                                          pipe_config, conn_state,
                                          pipe_config->shared_dpll);
        }
}

static void intel_ddi_post_disable(struct intel_encoder *intel_encoder,
                                   struct intel_crtc_state *old_crtc_state,
                                   struct drm_connector_state *old_conn_state)
{
        struct drm_encoder *encoder = &intel_encoder->base;
        struct drm_i915_private *dev_priv = to_i915(encoder->dev);
        enum port port = intel_ddi_get_encoder_port(intel_encoder);
        struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
        int type = intel_encoder->type;
        uint32_t val;
        bool wait = false;

        /* old_crtc_state and old_conn_state are NULL when called from DP_MST */

        val = I915_READ(DDI_BUF_CTL(port));
        if (val & DDI_BUF_CTL_ENABLE) {
                val &= ~DDI_BUF_CTL_ENABLE;
                I915_WRITE(DDI_BUF_CTL(port), val);
                wait = true;
        }

        val = I915_READ(DP_TP_CTL(port));
        val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
        val |= DP_TP_CTL_LINK_TRAIN_PAT1;
        I915_WRITE(DP_TP_CTL(port), val);

        if (wait)
                intel_wait_ddi_buf_idle(dev_priv, port);

        if (type == INTEL_OUTPUT_DP || type == INTEL_OUTPUT_EDP) {
                struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
                intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
                intel_edp_panel_vdd_on(intel_dp);
                intel_edp_panel_off(intel_dp);
        }

        if (dig_port)
                intel_display_power_put(dev_priv, dig_port->ddi_io_power_domain);

        if (IS_GEN9_BC(dev_priv))
                I915_WRITE(DPLL_CTRL2, (I915_READ(DPLL_CTRL2) |
                                        DPLL_CTRL2_DDI_CLK_OFF(port)));
        else if (INTEL_GEN(dev_priv) < 9)
                I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);

        if (type == INTEL_OUTPUT_HDMI) {
                struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);

                intel_dp_dual_mode_set_tmds_output(intel_hdmi, false);
        }
}

void intel_ddi_fdi_post_disable(struct intel_encoder *encoder,
                                struct intel_crtc_state *old_crtc_state,
                                struct drm_connector_state *old_conn_state)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        uint32_t val;

        /*
         * Bspec lists this as both step 13 (before DDI_BUF_CTL disable)
         * and step 18 (after clearing PORT_CLK_SEL). Based on a BUN,
         * step 13 is the correct place for it. Step 18 is where it was
         * originally before the BUN.
         */
        val = I915_READ(FDI_RX_CTL(PIPE_A));
        val &= ~FDI_RX_ENABLE;
        I915_WRITE(FDI_RX_CTL(PIPE_A), val);

        intel_ddi_post_disable(encoder, old_crtc_state, old_conn_state);

        val = I915_READ(FDI_RX_MISC(PIPE_A));
        val &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
        val |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
        I915_WRITE(FDI_RX_MISC(PIPE_A), val);

        val = I915_READ(FDI_RX_CTL(PIPE_A));
        val &= ~FDI_PCDCLK;
        I915_WRITE(FDI_RX_CTL(PIPE_A), val);

        val = I915_READ(FDI_RX_CTL(PIPE_A));
        val &= ~FDI_RX_PLL_ENABLE;
        I915_WRITE(FDI_RX_CTL(PIPE_A), val);
}

static void intel_enable_ddi(struct intel_encoder *intel_encoder,
                             struct intel_crtc_state *pipe_config,
                             struct drm_connector_state *conn_state)
{
        struct drm_encoder *encoder = &intel_encoder->base;
        struct drm_i915_private *dev_priv = to_i915(encoder->dev);
        enum port port = intel_ddi_get_encoder_port(intel_encoder);
        int type = intel_encoder->type;

        if (type == INTEL_OUTPUT_HDMI) {
                struct intel_digital_port *intel_dig_port =
                        enc_to_dig_port(encoder);
                bool clock_ratio = pipe_config->hdmi_high_tmds_clock_ratio;
                bool scrambling = pipe_config->hdmi_scrambling;

                intel_hdmi_handle_sink_scrambling(intel_encoder,
                                                  conn_state->connector,
                                                  clock_ratio, scrambling);

                /* In HDMI/DVI mode, the port width, and swing/emphasis values
                 * are ignored so nothing special needs to be done besides
                 * enabling the port.
                 */
                I915_WRITE(DDI_BUF_CTL(port),
                           intel_dig_port->saved_port_bits |
                           DDI_BUF_CTL_ENABLE);
        } else if (type == INTEL_OUTPUT_EDP) {
                struct intel_dp *intel_dp = enc_to_intel_dp(encoder);

                if (port == PORT_A && INTEL_GEN(dev_priv) < 9)
                        intel_dp_stop_link_train(intel_dp);

                intel_edp_backlight_on(intel_dp);
                intel_psr_enable(intel_dp);
                intel_edp_drrs_enable(intel_dp, pipe_config);
        }

        if (pipe_config->has_audio)
                intel_audio_codec_enable(intel_encoder, pipe_config, conn_state);
}

static void intel_disable_ddi(struct intel_encoder *intel_encoder,
                              struct intel_crtc_state *old_crtc_state,
                              struct drm_connector_state *old_conn_state)
{
        struct drm_encoder *encoder = &intel_encoder->base;
        int type = intel_encoder->type;

        if (old_crtc_state->has_audio)
                intel_audio_codec_disable(intel_encoder);

        if (type == INTEL_OUTPUT_HDMI) {
                intel_hdmi_handle_sink_scrambling(intel_encoder,
                                                  old_conn_state->connector,
                                                  false, false);
        }

        if (type == INTEL_OUTPUT_EDP) {
                struct intel_dp *intel_dp = enc_to_intel_dp(encoder);

                intel_edp_drrs_disable(intel_dp, old_crtc_state);
                intel_psr_disable(intel_dp);
                intel_edp_backlight_off(intel_dp);
        }
}

static void bxt_ddi_pre_pll_enable(struct intel_encoder *encoder,
                                   struct intel_crtc_state *pipe_config,
                                   struct drm_connector_state *conn_state)
{
        uint8_t mask = pipe_config->lane_lat_optim_mask;

        bxt_ddi_phy_set_lane_optim_mask(encoder, mask);
}

void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
{
        struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
        struct drm_i915_private *dev_priv =
                to_i915(intel_dig_port->base.base.dev);
        enum port port = intel_dig_port->port;
        uint32_t val;
        bool wait = false;

        if (I915_READ(DP_TP_CTL(port)) & DP_TP_CTL_ENABLE) {
                val = I915_READ(DDI_BUF_CTL(port));
                if (val & DDI_BUF_CTL_ENABLE) {
                        val &= ~DDI_BUF_CTL_ENABLE;
                        I915_WRITE(DDI_BUF_CTL(port), val);
                        wait = true;
                }

                val = I915_READ(DP_TP_CTL(port));
                val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
                val |= DP_TP_CTL_LINK_TRAIN_PAT1;
                I915_WRITE(DP_TP_CTL(port), val);
                POSTING_READ(DP_TP_CTL(port));

                if (wait)
                        intel_wait_ddi_buf_idle(dev_priv, port);
        }

        val = DP_TP_CTL_ENABLE |
              DP_TP_CTL_LINK_TRAIN_PAT1 | DP_TP_CTL_SCRAMBLE_DISABLE;
        if (intel_dp->link_mst)
                val |= DP_TP_CTL_MODE_MST;
        else {
                val |= DP_TP_CTL_MODE_SST;
                if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
                        val |= DP_TP_CTL_ENHANCED_FRAME_ENABLE;
        }
        I915_WRITE(DP_TP_CTL(port), val);
        POSTING_READ(DP_TP_CTL(port));

        intel_dp->DP |= DDI_BUF_CTL_ENABLE;
        I915_WRITE(DDI_BUF_CTL(port), intel_dp->DP);
        POSTING_READ(DDI_BUF_CTL(port));

        udelay(600);
}

bool intel_ddi_is_audio_enabled(struct drm_i915_private *dev_priv,
                                 struct intel_crtc *intel_crtc)
{
        u32 temp;

        if (intel_display_power_is_enabled(dev_priv, POWER_DOMAIN_AUDIO)) {
                temp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
                if (temp & AUDIO_OUTPUT_ENABLE(intel_crtc->pipe))
                        return true;
        }
        return false;
}

void intel_ddi_get_config(struct intel_encoder *encoder,
                          struct intel_crtc_state *pipe_config)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
        enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
        struct intel_hdmi *intel_hdmi;
        u32 temp, flags = 0;

        /* XXX: DSI transcoder paranoia */
        if (WARN_ON(transcoder_is_dsi(cpu_transcoder)))
                return;

        temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
        if (temp & TRANS_DDI_PHSYNC)
                flags |= DRM_MODE_FLAG_PHSYNC;
        else
                flags |= DRM_MODE_FLAG_NHSYNC;
        if (temp & TRANS_DDI_PVSYNC)
                flags |= DRM_MODE_FLAG_PVSYNC;
        else
                flags |= DRM_MODE_FLAG_NVSYNC;

        pipe_config->base.adjusted_mode.flags |= flags;

        switch (temp & TRANS_DDI_BPC_MASK) {
        case TRANS_DDI_BPC_6:
                pipe_config->pipe_bpp = 18;
                break;
        case TRANS_DDI_BPC_8:
                pipe_config->pipe_bpp = 24;
                break;
        case TRANS_DDI_BPC_10:
                pipe_config->pipe_bpp = 30;
                break;
        case TRANS_DDI_BPC_12:
                pipe_config->pipe_bpp = 36;
                break;
        default:
                break;
        }

        switch (temp & TRANS_DDI_MODE_SELECT_MASK) {
        case TRANS_DDI_MODE_SELECT_HDMI:
                pipe_config->has_hdmi_sink = true;
                intel_hdmi = enc_to_intel_hdmi(&encoder->base);

                if (intel_hdmi->infoframe_enabled(&encoder->base, pipe_config))
                        pipe_config->has_infoframe = true;

                if ((temp & TRANS_DDI_HDMI_SCRAMBLING_MASK) ==
                        TRANS_DDI_HDMI_SCRAMBLING_MASK)
                        pipe_config->hdmi_scrambling = true;
                if (temp & TRANS_DDI_HIGH_TMDS_CHAR_RATE)
                        pipe_config->hdmi_high_tmds_clock_ratio = true;

                /* fall through */
        case TRANS_DDI_MODE_SELECT_DVI:
                pipe_config->lane_count = 4;
                break;
        case TRANS_DDI_MODE_SELECT_FDI:
                break;
        case TRANS_DDI_MODE_SELECT_DP_SST:
        case TRANS_DDI_MODE_SELECT_DP_MST:
                pipe_config->lane_count =
                        ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
                intel_dp_get_m_n(intel_crtc, pipe_config);
                break;
        default:
                break;
        }

        pipe_config->has_audio =
                intel_ddi_is_audio_enabled(dev_priv, intel_crtc);

        if (encoder->type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.bpp &&
            pipe_config->pipe_bpp > dev_priv->vbt.edp.bpp) {
                /*
                 * This is a big fat ugly hack.
                 *
                 * Some machines in UEFI boot mode provide us a VBT that has 18
                 * bpp and 1.62 GHz link bandwidth for eDP, which for reasons
                 * unknown we fail to light up. Yet the same BIOS boots up with
                 * 24 bpp and 2.7 GHz link. Use the same bpp as the BIOS uses as
                 * max, not what it tells us to use.
                 *
                 * Note: This will still be broken if the eDP panel is not lit
                 * up by the BIOS, and thus we can't get the mode at module
                 * load.
                 */
                DRM_DEBUG_KMS("pipe has %d bpp for eDP panel, overriding BIOS-provided max %d bpp\n",
                              pipe_config->pipe_bpp, dev_priv->vbt.edp.bpp);
                dev_priv->vbt.edp.bpp = pipe_config->pipe_bpp;
        }

        intel_ddi_clock_get(encoder, pipe_config);

        if (IS_GEN9_LP(dev_priv))
                pipe_config->lane_lat_optim_mask =
                        bxt_ddi_phy_get_lane_lat_optim_mask(encoder);
}

static bool intel_ddi_compute_config(struct intel_encoder *encoder,
                                     struct intel_crtc_state *pipe_config,
                                     struct drm_connector_state *conn_state)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        int type = encoder->type;
        int port = intel_ddi_get_encoder_port(encoder);
        int ret;

        WARN(type == INTEL_OUTPUT_UNKNOWN, "compute_config() on unknown output!\n");

        if (port == PORT_A)
                pipe_config->cpu_transcoder = TRANSCODER_EDP;

        if (type == INTEL_OUTPUT_HDMI)
                ret = intel_hdmi_compute_config(encoder, pipe_config, conn_state);
        else
                ret = intel_dp_compute_config(encoder, pipe_config, conn_state);

        if (IS_GEN9_LP(dev_priv) && ret)
                pipe_config->lane_lat_optim_mask =
                        bxt_ddi_phy_calc_lane_lat_optim_mask(encoder,
                                                             pipe_config->lane_count);

        return ret;

}

static const struct drm_encoder_funcs intel_ddi_funcs = {
        .reset = intel_dp_encoder_reset,
        .destroy = intel_dp_encoder_destroy,
};

static struct intel_connector *
intel_ddi_init_dp_connector(struct intel_digital_port *intel_dig_port)
{
        struct intel_connector *connector;
        enum port port = intel_dig_port->port;

        connector = intel_connector_alloc();
        if (!connector)
                return NULL;

        intel_dig_port->dp.output_reg = DDI_BUF_CTL(port);
        if (!intel_dp_init_connector(intel_dig_port, connector)) {
                kfree(connector);
                return NULL;
        }

        return connector;
}

static struct intel_connector *
intel_ddi_init_hdmi_connector(struct intel_digital_port *intel_dig_port)
{
        struct intel_connector *connector;
        enum port port = intel_dig_port->port;

        connector = intel_connector_alloc();
        if (!connector)
                return NULL;

        intel_dig_port->hdmi.hdmi_reg = DDI_BUF_CTL(port);
        intel_hdmi_init_connector(intel_dig_port, connector);

        return connector;
}

void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
{
        struct intel_digital_port *intel_dig_port;
        struct intel_encoder *intel_encoder;
        struct drm_encoder *encoder;
        bool init_hdmi, init_dp, init_lspcon = false;
        int max_lanes;

        if (I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES) {
                switch (port) {
                case PORT_A:
                        max_lanes = 4;
                        break;
                case PORT_E:
                        max_lanes = 0;
                        break;
                default:
                        max_lanes = 4;
                        break;
                }
        } else {
                switch (port) {
                case PORT_A:
                        max_lanes = 2;
                        break;
                case PORT_E:
                        max_lanes = 2;
                        break;
                default:
                        max_lanes = 4;
                        break;
                }
        }

        init_hdmi = (dev_priv->vbt.ddi_port_info[port].supports_dvi ||
                     dev_priv->vbt.ddi_port_info[port].supports_hdmi);
        init_dp = dev_priv->vbt.ddi_port_info[port].supports_dp;

        if (intel_bios_is_lspcon_present(dev_priv, port)) {
                /*
                 * Lspcon device needs to be driven with DP connector
                 * with special detection sequence. So make sure DP
                 * is initialized before lspcon.
                 */
                init_dp = true;
                init_lspcon = true;
                init_hdmi = false;
                DRM_DEBUG_KMS("VBT says port %c has lspcon\n", port_name(port));
        }

        if (!init_dp && !init_hdmi) {
                DRM_DEBUG_KMS("VBT says port %c is not DVI/HDMI/DP compatible, respect it\n",
                              port_name(port));
                return;
        }

        intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
        if (!intel_dig_port)
                return;

        intel_encoder = &intel_dig_port->base;
        encoder = &intel_encoder->base;

        drm_encoder_init(&dev_priv->drm, encoder, &intel_ddi_funcs,
                         DRM_MODE_ENCODER_TMDS, "DDI %c", port_name(port));

        intel_encoder->compute_config = intel_ddi_compute_config;
        intel_encoder->enable = intel_enable_ddi;
        if (IS_GEN9_LP(dev_priv))
                intel_encoder->pre_pll_enable = bxt_ddi_pre_pll_enable;
        intel_encoder->pre_enable = intel_ddi_pre_enable;
        intel_encoder->disable = intel_disable_ddi;
        intel_encoder->post_disable = intel_ddi_post_disable;
        intel_encoder->get_hw_state = intel_ddi_get_hw_state;
        intel_encoder->get_config = intel_ddi_get_config;
        intel_encoder->suspend = intel_dp_encoder_suspend;
        intel_encoder->get_power_domains = intel_ddi_get_power_domains;

        intel_dig_port->port = port;
        intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
                                          (DDI_BUF_PORT_REVERSAL |
                                           DDI_A_4_LANES);

        switch (port) {
        case PORT_A:
                intel_dig_port->ddi_io_power_domain =
                        POWER_DOMAIN_PORT_DDI_A_IO;
                break;
        case PORT_B:
                intel_dig_port->ddi_io_power_domain =
                        POWER_DOMAIN_PORT_DDI_B_IO;
                break;
        case PORT_C:
                intel_dig_port->ddi_io_power_domain =
                        POWER_DOMAIN_PORT_DDI_C_IO;
                break;
        case PORT_D:
                intel_dig_port->ddi_io_power_domain =
                        POWER_DOMAIN_PORT_DDI_D_IO;
                break;
        case PORT_E:
                intel_dig_port->ddi_io_power_domain =
                        POWER_DOMAIN_PORT_DDI_E_IO;
                break;
        default:
                MISSING_CASE(port);
        }

        /*
         * Bspec says that DDI_A_4_LANES is the only supported configuration
         * for Broxton.  Yet some BIOS fail to set this bit on port A if eDP
         * wasn't lit up at boot.  Force this bit on in our internal
         * configuration so that we use the proper lane count for our
         * calculations.
         */
        if (IS_GEN9_LP(dev_priv) && port == PORT_A) {
                if (!(intel_dig_port->saved_port_bits & DDI_A_4_LANES)) {
                        DRM_DEBUG_KMS("BXT BIOS forgot to set DDI_A_4_LANES for port A; fixing\n");
                        intel_dig_port->saved_port_bits |= DDI_A_4_LANES;
                        max_lanes = 4;
                }
        }

        intel_dig_port->max_lanes = max_lanes;

        intel_encoder->type = INTEL_OUTPUT_UNKNOWN;
        intel_encoder->power_domain = intel_port_to_power_domain(port);
        intel_encoder->port = port;
        intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
        intel_encoder->cloneable = 0;

        if (init_dp) {
                if (!intel_ddi_init_dp_connector(intel_dig_port))
                        goto err;

                intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
                dev_priv->hotplug.irq_port[port] = intel_dig_port;
        }

        /* In theory we don't need the encoder->type check, but leave it just in
         * case we have some really bad VBTs... */
        if (intel_encoder->type != INTEL_OUTPUT_EDP && init_hdmi) {
                if (!intel_ddi_init_hdmi_connector(intel_dig_port))
                        goto err;
        }

        if (init_lspcon) {
                if (lspcon_init(intel_dig_port))
                        /* TODO: handle hdmi info frame part */
                        DRM_DEBUG_KMS("LSPCON init success on port %c\n",
                                port_name(port));
                else
                        /*
                         * LSPCON init faied, but DP init was success, so
                         * lets try to drive as DP++ port.
                         */
                        DRM_ERROR("LSPCON init failed on port %c\n",
                                port_name(port));
        }

        return;

err:
        drm_encoder_cleanup(encoder);
        kfree(intel_dig_port);
}