android_kernel_samsung_sm8650-modules/msm/dsi/dsi_phy_hw_v4_0.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
 */

#include <linux/math64.h>
#include <linux/delay.h>
#include <linux/iopoll.h>
#include "dsi_hw.h"
#include "dsi_defs.h"
#include "dsi_phy_hw.h"
#include "dsi_catalog.h"

#define DSIPHY_CMN_REVISION_ID0						0x000
#define DSIPHY_CMN_REVISION_ID1						0x004
#define DSIPHY_CMN_REVISION_ID2						0x008
#define DSIPHY_CMN_REVISION_ID3						0x00C
#define DSIPHY_CMN_CLK_CFG0						0x010
#define DSIPHY_CMN_CLK_CFG1						0x014
#define DSIPHY_CMN_GLBL_CTRL						0x018
#define DSIPHY_CMN_RBUF_CTRL						0x01C
#define DSIPHY_CMN_VREG_CTRL_0						0x020
#define DSIPHY_CMN_CTRL_0						0x024
#define DSIPHY_CMN_CTRL_1						0x028
#define DSIPHY_CMN_CTRL_2						0x02C
#define DSIPHY_CMN_CTRL_3						0x030
#define DSIPHY_CMN_LANE_CFG0						0x034
#define DSIPHY_CMN_LANE_CFG1						0x038
#define DSIPHY_CMN_PLL_CNTRL						0x03C
#define DSIPHY_CMN_DPHY_SOT						0x040
#define DSIPHY_CMN_LANE_CTRL0						0x0A0
#define DSIPHY_CMN_LANE_CTRL1						0x0A4
#define DSIPHY_CMN_LANE_CTRL2						0x0A8
#define DSIPHY_CMN_LANE_CTRL3						0x0AC
#define DSIPHY_CMN_LANE_CTRL4						0x0B0
#define DSIPHY_CMN_TIMING_CTRL_0					0x0B4
#define DSIPHY_CMN_TIMING_CTRL_1					0x0B8
#define DSIPHY_CMN_TIMING_CTRL_2					0x0Bc
#define DSIPHY_CMN_TIMING_CTRL_3					0x0C0
#define DSIPHY_CMN_TIMING_CTRL_4					0x0C4
#define DSIPHY_CMN_TIMING_CTRL_5					0x0C8
#define DSIPHY_CMN_TIMING_CTRL_6					0x0CC
#define DSIPHY_CMN_TIMING_CTRL_7					0x0D0
#define DSIPHY_CMN_TIMING_CTRL_8					0x0D4
#define DSIPHY_CMN_TIMING_CTRL_9					0x0D8
#define DSIPHY_CMN_TIMING_CTRL_10					0x0DC
#define DSIPHY_CMN_TIMING_CTRL_11					0x0E0
#define DSIPHY_CMN_TIMING_CTRL_12					0x0E4
#define DSIPHY_CMN_TIMING_CTRL_13					0x0E8
#define DSIPHY_CMN_GLBL_HSTX_STR_CTRL_0					0x0EC
#define DSIPHY_CMN_GLBL_HSTX_STR_CTRL_1					0x0F0
#define DSIPHY_CMN_GLBL_RESCODE_OFFSET_TOP_CTRL				0x0F4
#define DSIPHY_CMN_GLBL_RESCODE_OFFSET_BOT_CTRL				0x0F8
#define DSIPHY_CMN_GLBL_RESCODE_OFFSET_MID_CTRL				0x0FC
#define DSIPHY_CMN_GLBL_LPTX_STR_CTRL					0x100
#define DSIPHY_CMN_GLBL_PEMPH_CTRL_0					0x104
#define DSIPHY_CMN_GLBL_PEMPH_CTRL_1					0x108
#define DSIPHY_CMN_GLBL_STR_SWI_CAL_SEL_CTRL				0x10C
#define DSIPHY_CMN_VREG_CTRL_1						0x110
#define DSIPHY_CMN_CTRL_4						0x114
#define DSIPHY_CMN_PHY_STATUS						0x140
#define DSIPHY_CMN_LANE_STATUS0						0x148
#define DSIPHY_CMN_LANE_STATUS1						0x14C
#define DSIPHY_CMN_GLBL_DIGTOP_SPARE10                                  0x1AC
#define DSIPHY_CMN_SL_DSI_LANE_CTRL1                                0x1B4

/* n = 0..3 for data lanes and n = 4 for clock lane */
#define DSIPHY_LNX_CFG0(n)                         (0x200 + (0x80 * (n)))
#define DSIPHY_LNX_CFG1(n)                         (0x204 + (0x80 * (n)))
#define DSIPHY_LNX_CFG2(n)                         (0x208 + (0x80 * (n)))
#define DSIPHY_LNX_TEST_DATAPATH(n)                (0x20C + (0x80 * (n)))
#define DSIPHY_LNX_PIN_SWAP(n)                     (0x210 + (0x80 * (n)))
#define DSIPHY_LNX_LPRX_CTRL(n)                    (0x214 + (0x80 * (n)))
#define DSIPHY_LNX_TX_DCTRL(n)                     (0x218 + (0x80 * (n)))

/* dynamic refresh control registers */
#define DSI_DYN_REFRESH_CTRL                   (0x000)
#define DSI_DYN_REFRESH_PIPE_DELAY             (0x004)
#define DSI_DYN_REFRESH_PIPE_DELAY2            (0x008)
#define DSI_DYN_REFRESH_PLL_DELAY              (0x00C)
#define DSI_DYN_REFRESH_STATUS                 (0x010)
#define DSI_DYN_REFRESH_PLL_CTRL0              (0x014)
#define DSI_DYN_REFRESH_PLL_CTRL1              (0x018)
#define DSI_DYN_REFRESH_PLL_CTRL2              (0x01C)
#define DSI_DYN_REFRESH_PLL_CTRL3              (0x020)
#define DSI_DYN_REFRESH_PLL_CTRL4              (0x024)
#define DSI_DYN_REFRESH_PLL_CTRL5              (0x028)
#define DSI_DYN_REFRESH_PLL_CTRL6              (0x02C)
#define DSI_DYN_REFRESH_PLL_CTRL7              (0x030)
#define DSI_DYN_REFRESH_PLL_CTRL8              (0x034)
#define DSI_DYN_REFRESH_PLL_CTRL9              (0x038)
#define DSI_DYN_REFRESH_PLL_CTRL10             (0x03C)
#define DSI_DYN_REFRESH_PLL_CTRL11             (0x040)
#define DSI_DYN_REFRESH_PLL_CTRL12             (0x044)
#define DSI_DYN_REFRESH_PLL_CTRL13             (0x048)
#define DSI_DYN_REFRESH_PLL_CTRL14             (0x04C)
#define DSI_DYN_REFRESH_PLL_CTRL15             (0x050)
#define DSI_DYN_REFRESH_PLL_CTRL16             (0x054)
#define DSI_DYN_REFRESH_PLL_CTRL17             (0x058)
#define DSI_DYN_REFRESH_PLL_CTRL18             (0x05C)
#define DSI_DYN_REFRESH_PLL_CTRL19             (0x060)
#define DSI_DYN_REFRESH_PLL_CTRL20             (0x064)
#define DSI_DYN_REFRESH_PLL_CTRL21             (0x068)
#define DSI_DYN_REFRESH_PLL_CTRL22             (0x06C)
#define DSI_DYN_REFRESH_PLL_CTRL23             (0x070)
#define DSI_DYN_REFRESH_PLL_CTRL24             (0x074)
#define DSI_DYN_REFRESH_PLL_CTRL25             (0x078)
#define DSI_DYN_REFRESH_PLL_CTRL26             (0x07C)
#define DSI_DYN_REFRESH_PLL_CTRL27             (0x080)
#define DSI_DYN_REFRESH_PLL_CTRL28             (0x084)
#define DSI_DYN_REFRESH_PLL_CTRL29             (0x088)
#define DSI_DYN_REFRESH_PLL_CTRL30             (0x08C)
#define DSI_DYN_REFRESH_PLL_CTRL31             (0x090)
#define DSI_DYN_REFRESH_PLL_UPPER_ADDR         (0x094)
#define DSI_DYN_REFRESH_PLL_UPPER_ADDR2        (0x098)

static int dsi_phy_hw_v4_0_is_pll_on(struct dsi_phy_hw *phy)
{
	u32 data = 0;

	data = DSI_R32(phy, DSIPHY_CMN_PLL_CNTRL);
	mb(); /*make sure read happened */
	return (data & BIT(0));
}

static bool dsi_phy_hw_v4_0_is_split_link_enabled(struct dsi_phy_hw *phy)
{
	u32 reg = 0;

	reg = DSI_R32(phy, DSIPHY_CMN_GLBL_CTRL);
	mb(); /*make sure read happened */
	return (reg & BIT(5));
}

static void dsi_phy_hw_v4_0_config_lpcdrx(struct dsi_phy_hw *phy,
	struct dsi_phy_cfg *cfg, bool enable)
{
	int phy_lane_0 = dsi_phy_conv_logical_to_phy_lane(&cfg->lane_map,
			DSI_LOGICAL_LANE_0);
	/*
	 * LPRX and CDRX need to enabled only for physical data lane
	 * corresponding to the logical data lane 0
	 */

	if (enable)
		DSI_W32(phy, DSIPHY_LNX_LPRX_CTRL(phy_lane_0),
			cfg->strength.lane[phy_lane_0][1]);
	else
		DSI_W32(phy, DSIPHY_LNX_LPRX_CTRL(phy_lane_0), 0);
}

static void dsi_phy_hw_v4_0_lane_swap_config(struct dsi_phy_hw *phy,
		struct dsi_lane_map *lane_map)
{
	DSI_W32(phy, DSIPHY_CMN_LANE_CFG0,
		(lane_map->lane_map_v2[DSI_LOGICAL_LANE_0] |
		(lane_map->lane_map_v2[DSI_LOGICAL_LANE_1] << 4)));
	DSI_W32(phy, DSIPHY_CMN_LANE_CFG1,
		(lane_map->lane_map_v2[DSI_LOGICAL_LANE_2] |
		(lane_map->lane_map_v2[DSI_LOGICAL_LANE_3] << 4)));
}

static void dsi_phy_hw_v4_0_lane_settings(struct dsi_phy_hw *phy,
			    struct dsi_phy_cfg *cfg)
{
	int i;
	u8 tx_dctrl_v4[] = {0x00, 0x00, 0x00, 0x04, 0x01};
	u8 tx_dctrl_v4_1[] = {0x40, 0x40, 0x40, 0x46, 0x41};
	u8 *tx_dctrl;
	bool split_link_enabled;
	u32 lanes_per_sublink;

	if (phy->version >= DSI_PHY_VERSION_4_1)
		tx_dctrl = &tx_dctrl_v4_1[0];
	else
		tx_dctrl = &tx_dctrl_v4[0];

	split_link_enabled = cfg->split_link.enabled;
	lanes_per_sublink = cfg->split_link.lanes_per_sublink;

	/* Strength ctrl settings */
	for (i = DSI_LOGICAL_LANE_0; i < DSI_LANE_MAX; i++) {
		/*
		 * Disable LPRX and CDRX for all lanes. And later on, it will
		 * be only enabled for the physical data lane corresponding
		 * to the logical data lane 0
		 */
		DSI_W32(phy, DSIPHY_LNX_LPRX_CTRL(i), 0);
		DSI_W32(phy, DSIPHY_LNX_PIN_SWAP(i), 0x0);
	}
	dsi_phy_hw_v4_0_config_lpcdrx(phy, cfg, true);

	/* other settings */
	for (i = DSI_LOGICAL_LANE_0; i < DSI_LANE_MAX; i++) {
		DSI_W32(phy, DSIPHY_LNX_CFG0(i), cfg->lanecfg.lane[i][0]);
		DSI_W32(phy, DSIPHY_LNX_CFG1(i), cfg->lanecfg.lane[i][1]);
		DSI_W32(phy, DSIPHY_LNX_CFG2(i), cfg->lanecfg.lane[i][2]);
		DSI_W32(phy, DSIPHY_LNX_TX_DCTRL(i), tx_dctrl[i]);
	}

	/* remove below check if cphy splitlink is enabled */
	if (split_link_enabled && (cfg->phy_type == DSI_PHY_TYPE_CPHY))
		return;

	/* Configure the splitlink clock lane with clk lane settings */
	if (split_link_enabled) {
		DSI_W32(phy, DSIPHY_LNX_LPRX_CTRL(5), 0x0);
		DSI_W32(phy, DSIPHY_LNX_PIN_SWAP(5), 0x0);
		DSI_W32(phy, DSIPHY_LNX_CFG0(5), cfg->lanecfg.lane[4][0]);
		DSI_W32(phy, DSIPHY_LNX_CFG1(5), cfg->lanecfg.lane[4][1]);
		DSI_W32(phy, DSIPHY_LNX_CFG2(5), cfg->lanecfg.lane[4][2]);
		DSI_W32(phy, DSIPHY_LNX_TX_DCTRL(5), tx_dctrl[4]);
	}
}

void dsi_phy_hw_v4_0_commit_phy_timing(struct dsi_phy_hw *phy,
		struct dsi_phy_per_lane_cfgs *timing)
{
	/* Commit DSI PHY timings */
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_0, timing->lane_v4[0]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_1, timing->lane_v4[1]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_2, timing->lane_v4[2]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_3, timing->lane_v4[3]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_4, timing->lane_v4[4]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_5, timing->lane_v4[5]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_6, timing->lane_v4[6]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_7, timing->lane_v4[7]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_8, timing->lane_v4[8]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_9, timing->lane_v4[9]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_10, timing->lane_v4[10]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_11, timing->lane_v4[11]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_12, timing->lane_v4[12]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_13, timing->lane_v4[13]);
}

/**
 * cphy_enable() - Enable CPHY hardware
 * @phy:      Pointer to DSI PHY hardware object.
 * @cfg:      Per lane configurations for timing, strength and lane
 *	      configurations.
 */
static void dsi_phy_hw_cphy_enable(struct dsi_phy_hw *phy,
			    struct dsi_phy_cfg *cfg)
{
	struct dsi_phy_per_lane_cfgs *timing = &cfg->timing;
	u32 data;
	u32 minor_ver = 0;
	/* For C-PHY, no low power settings for lower clk rate */
	u32 vreg_ctrl_0 = 0x51;
	u32 glbl_str_swi_cal_sel_ctrl = 0;
	u32 glbl_hstx_str_ctrl_0 = 0;
	u32 glbl_rescode_top_ctrl = 0;
	u32 glbl_rescode_bot_ctrl = 0;
	bool less_than_1500_mhz = false;

	/* Alter PHY configurations if data rate less than 1.5GHZ*/
	if (cfg->bit_clk_rate_hz <= 1500000000)
		less_than_1500_mhz = true;

	if (phy->version >= DSI_PHY_VERSION_4_2) {
		glbl_rescode_top_ctrl = less_than_1500_mhz ? 0x3d : 0x01;
		glbl_rescode_bot_ctrl = less_than_1500_mhz ? 0x38 : 0x3b;
	} else if (phy->version == DSI_PHY_VERSION_4_1) {
		glbl_rescode_top_ctrl = 0x00;
		glbl_rescode_bot_ctrl = 0x3C;
		glbl_str_swi_cal_sel_ctrl = 0x00;
		glbl_hstx_str_ctrl_0 = 0x88;
	} else {
		glbl_str_swi_cal_sel_ctrl = 0x03;
		glbl_hstx_str_ctrl_0 = 0x66;
		glbl_rescode_top_ctrl = 0x03;
		glbl_rescode_bot_ctrl = 0x3c;
	}

	/* de-assert digital and pll power down */
	data = BIT(6) | BIT(5);
	DSI_W32(phy, DSIPHY_CMN_CTRL_0, data);

	/* Assert PLL core reset */
	DSI_W32(phy, DSIPHY_CMN_PLL_CNTRL, 0x00);

	/* turn off resync FIFO */
	DSI_W32(phy, DSIPHY_CMN_RBUF_CTRL, 0x00);

	/* program CMN_CTRL_4 for minor_ver greater than 2 chipsets*/
	minor_ver = DSI_R32(phy, DSIPHY_CMN_REVISION_ID0);
	minor_ver = minor_ver & (0xf0);
	if (minor_ver >= 0x20)
		DSI_W32(phy, DSIPHY_CMN_CTRL_4, 0x04);

	/* Configure PHY lane swap */
	dsi_phy_hw_v4_0_lane_swap_config(phy, &cfg->lane_map);

	DSI_W32(phy, DSIPHY_CMN_GLBL_CTRL, BIT(6));

	/* Enable LDO */
	DSI_W32(phy, DSIPHY_CMN_VREG_CTRL_0, vreg_ctrl_0);
	DSI_W32(phy, DSIPHY_CMN_VREG_CTRL_1, 0x55);
	DSI_W32(phy, DSIPHY_CMN_GLBL_STR_SWI_CAL_SEL_CTRL,
					glbl_str_swi_cal_sel_ctrl);
	DSI_W32(phy, DSIPHY_CMN_GLBL_HSTX_STR_CTRL_0, glbl_hstx_str_ctrl_0);
	DSI_W32(phy, DSIPHY_CMN_GLBL_PEMPH_CTRL_0, 0x11);
	DSI_W32(phy, DSIPHY_CMN_GLBL_PEMPH_CTRL_1, 0x01);
	DSI_W32(phy, DSIPHY_CMN_GLBL_RESCODE_OFFSET_TOP_CTRL,
			glbl_rescode_top_ctrl);
	DSI_W32(phy, DSIPHY_CMN_GLBL_RESCODE_OFFSET_BOT_CTRL,
			glbl_rescode_bot_ctrl);
	DSI_W32(phy, DSIPHY_CMN_GLBL_LPTX_STR_CTRL, 0x55);

	/* Remove power down from all blocks */
	DSI_W32(phy, DSIPHY_CMN_CTRL_0, 0x7f);

	DSI_W32(phy, DSIPHY_CMN_LANE_CTRL0, 0x17);

	switch (cfg->pll_source) {
	case DSI_PLL_SOURCE_STANDALONE:
	case DSI_PLL_SOURCE_NATIVE:
		data = 0x0; /* internal PLL */
		break;
	case DSI_PLL_SOURCE_NON_NATIVE:
		data = 0x1; /* external PLL */
		break;
	default:
		break;
	}
	DSI_W32(phy, DSIPHY_CMN_CLK_CFG1, (data << 2)); /* set PLL src */

	/* DSI PHY timings */
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_0, timing->lane_v4[0]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_4, timing->lane_v4[4]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_5, timing->lane_v4[5]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_6, timing->lane_v4[6]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_7, timing->lane_v4[7]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_8, timing->lane_v4[8]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_9, timing->lane_v4[9]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_10, timing->lane_v4[10]);
	DSI_W32(phy, DSIPHY_CMN_TIMING_CTRL_11, timing->lane_v4[11]);

	/* DSI lane settings */
	dsi_phy_hw_v4_0_lane_settings(phy, cfg);

	DSI_PHY_DBG(phy, "C-Phy enabled\n");
}

/**
 * dphy_enable() - Enable DPHY hardware
 * @phy:      Pointer to DSI PHY hardware object.
 * @cfg:      Per lane configurations for timing, strength and lane
 *	      configurations.
 */
static void dsi_phy_hw_dphy_enable(struct dsi_phy_hw *phy,
			    struct dsi_phy_cfg *cfg)
{
	struct dsi_phy_per_lane_cfgs *timing = &cfg->timing;
	u32 data;
	u32 minor_ver = 0;
	bool less_than_1500_mhz = false;
	u32 vreg_ctrl_0 = 0;
	u32 glbl_str_swi_cal_sel_ctrl = 0;
	u32 glbl_hstx_str_ctrl_0 = 0;
	u32 glbl_rescode_top_ctrl = 0;
	u32 glbl_rescode_bot_ctrl = 0;
	bool split_link_enabled;
	u32 lanes_per_sublink;

	/* Alter PHY configurations if data rate less than 1.5GHZ*/
	if (cfg->bit_clk_rate_hz <= 1500000000)
		less_than_1500_mhz = true;

	if (phy->version >= DSI_PHY_VERSION_4_2) {
		vreg_ctrl_0 = less_than_1500_mhz ? 0x53 : 0x52;
		glbl_rescode_top_ctrl = less_than_1500_mhz ? 0x3c : 0x00;
		glbl_rescode_bot_ctrl = less_than_1500_mhz ? 0x38 : 0x39;
		glbl_str_swi_cal_sel_ctrl = 0x00;
		glbl_hstx_str_ctrl_0 = 0x88;
	} else if (phy->version == DSI_PHY_VERSION_4_1) {
		vreg_ctrl_0 = less_than_1500_mhz ? 0x53 : 0x52;
		glbl_rescode_top_ctrl = less_than_1500_mhz ? 0x3d :  0x00;
		glbl_rescode_bot_ctrl = less_than_1500_mhz ? 0x39 :  0x3c;
		glbl_str_swi_cal_sel_ctrl = 0x00;
		glbl_hstx_str_ctrl_0 = 0x88;
	} else {
		vreg_ctrl_0 = less_than_1500_mhz ? 0x5B : 0x59;
		glbl_str_swi_cal_sel_ctrl = less_than_1500_mhz ? 0x03 : 0x00;
		glbl_hstx_str_ctrl_0 = less_than_1500_mhz ? 0x66 : 0x88;
		glbl_rescode_top_ctrl = 0x03;
		glbl_rescode_bot_ctrl = 0x3c;
	}

	if (phy->version >= DSI_PHY_VERSION_4_3)
		glbl_rescode_top_ctrl = less_than_1500_mhz ? 0x3d : 0x01;

	split_link_enabled = cfg->split_link.enabled;
	lanes_per_sublink = cfg->split_link.lanes_per_sublink;
	/* de-assert digital and pll power down */
	data = BIT(6) | BIT(5);
	DSI_W32(phy, DSIPHY_CMN_CTRL_0, data);

	if (split_link_enabled) {
		data = DSI_R32(phy, DSIPHY_CMN_GLBL_CTRL);
		/* set SPLIT_LINK_ENABLE in global control */
		DSI_W32(phy, DSIPHY_CMN_GLBL_CTRL, (data | BIT(5)));
	}
	/* Assert PLL core reset */
	DSI_W32(phy, DSIPHY_CMN_PLL_CNTRL, 0x00);

	/* turn off resync FIFO */
	DSI_W32(phy, DSIPHY_CMN_RBUF_CTRL, 0x00);

	/* program CMN_CTRL_4 for minor_ver greater than 2 chipsets*/
	minor_ver = DSI_R32(phy, DSIPHY_CMN_REVISION_ID0);
	minor_ver = minor_ver & (0xf0);
	if (minor_ver >= 0x20)
		DSI_W32(phy, DSIPHY_CMN_CTRL_4, 0x04);

	/* Configure PHY lane swap */
	dsi_phy_hw_v4_0_lane_swap_config(phy, &cfg->lane_map);

	/* Enable LDO */
	DSI_W32(phy, DSIPHY_CMN_VREG_CTRL_0, vreg_ctrl_0);
	DSI_W32(phy, DSIPHY_CMN_VREG_CTRL_1, 0x5c);
	DSI_W32(phy, DSIPHY_CMN_CTRL_3, 0x00);
	DSI_W32(phy, DSIPHY_CMN_GLBL_STR_SWI_CAL_SEL_CTRL,
					glbl_str_swi_cal_sel_ctrl);
	DSI_W32(phy, DSIPHY_CMN_GLBL_HSTX_STR_CTRL_0, glbl_hstx_str_ctrl_0);
	DSI_W32(phy, DSIPHY_CMN_GLBL_PEMPH_CTRL_0, 0x00);
	DSI_W32(phy, DSIPHY_CMN_GLBL_RESCODE_OFFSET_TOP_CTRL,
			glbl_rescode_top_ctrl);
	DSI_W32(phy, DSIPHY_CMN_GLBL_RESCODE_OFFSET_BOT_CTRL,
			glbl_rescode_bot_ctrl);
	DSI_W32(phy, DSIPHY_CMN_GLBL_LPTX_STR_CTRL, 0x55);

	if (split_link_enabled) {
		if (lanes_per_sublink == 1) {
			/* remove Lane1 and Lane3 configs */
			DSI_W32(phy, DSIPHY_CMN_CTRL_0, 0xed);
			DSI_W32(phy, DSIPHY_CMN_LANE_CTRL0, 0x35);
		} else {
			/* enable all together with sublink clock */
			DSI_W32(phy, DSIPHY_CMN_CTRL_0, 0xff);
			DSI_W32(phy, DSIPHY_CMN_LANE_CTRL0, 0x3F);
		}

		DSI_W32(phy, DSIPHY_CMN_SL_DSI_LANE_CTRL1, 0x03);
	} else {
		/* Remove power down from all blocks */
		DSI_W32(phy, DSIPHY_CMN_CTRL_0, 0x7f);
		DSI_W32(phy, DSIPHY_CMN_LANE_CTRL0, 0x1F);
	}

	/* Select full-rate mode */
	DSI_W32(phy, DSIPHY_CMN_CTRL_2, 0x40);

	switch (cfg->pll_source) {
	case DSI_PLL_SOURCE_STANDALONE:
	case DSI_PLL_SOURCE_NATIVE:
		data = 0x0; /* internal PLL */
		break;
	case DSI_PLL_SOURCE_NON_NATIVE:
		data = 0x1; /* external PLL */
		break;
	default:
		break;
	}
	DSI_W32(phy, DSIPHY_CMN_CLK_CFG1, (data << 2)); /* set PLL src */

	/* DSI PHY timings */
	dsi_phy_hw_v4_0_commit_phy_timing(phy, timing);

	/* DSI lane settings */
	dsi_phy_hw_v4_0_lane_settings(phy, cfg);

	DSI_PHY_DBG(phy, "D-Phy enabled\n");
}

/**
 * enable() - Enable PHY hardware
 * @phy:      Pointer to DSI PHY hardware object.
 * @cfg:      Per lane configurations for timing, strength and lane
 *	      configurations.
 */
void dsi_phy_hw_v4_0_enable(struct dsi_phy_hw *phy,
			    struct dsi_phy_cfg *cfg)
{
	int rc = 0;
	u32 status;
	u32 const delay_us = 5;
	u32 const timeout_us = 1000;

	if (dsi_phy_hw_v4_0_is_pll_on(phy))
		pr_warn("PLL turned on before configuring PHY\n");

	/* Request for REFGEN ready */
	if (phy->version == DSI_PHY_VERSION_4_3) {
		DSI_W32(phy, DSIPHY_CMN_GLBL_DIGTOP_SPARE10, 0x1);
		udelay(500);
	}

	/* wait for REFGEN READY */
	rc = DSI_READ_POLL_TIMEOUT_ATOMIC(phy, DSIPHY_CMN_PHY_STATUS,
		status, (status & BIT(0)), delay_us, timeout_us);
	if (rc) {
		DSI_PHY_ERR(phy, "Ref gen not ready. Aborting\n");
		return;
	}

	if (cfg->phy_type == DSI_PHY_TYPE_CPHY)
		dsi_phy_hw_cphy_enable(phy, cfg);
	else /* Default PHY type is DPHY */
		dsi_phy_hw_dphy_enable(phy, cfg);

}

/**
 * disable() - Disable PHY hardware
 * @phy:      Pointer to DSI PHY hardware object.
 */
void dsi_phy_hw_v4_0_disable(struct dsi_phy_hw *phy,
			    struct dsi_phy_cfg *cfg)
{
	u32 data = 0;

	if (dsi_phy_hw_v4_0_is_pll_on(phy))
		DSI_PHY_WARN(phy, "Turning OFF PHY while PLL is on\n");

	dsi_phy_hw_v4_0_config_lpcdrx(phy, cfg, false);

	data = DSI_R32(phy, DSIPHY_CMN_CTRL_0);
	/* disable all lanes and splitlink clk lane*/
	data &= ~0x9F;
	DSI_W32(phy, DSIPHY_CMN_CTRL_0, data);
	DSI_W32(phy, DSIPHY_CMN_LANE_CTRL0, 0);

	/* Turn off all PHY blocks */
	DSI_W32(phy, DSIPHY_CMN_CTRL_0, 0x00);
	/* make sure phy is turned off */
	wmb();
	DSI_PHY_DBG(phy, "Phy disabled\n");
}

void dsi_phy_hw_v4_0_toggle_resync_fifo(struct dsi_phy_hw *phy)
{
	DSI_W32(phy, DSIPHY_CMN_RBUF_CTRL, 0x00);
	/* ensure that the FIFO is off */
	wmb();
	DSI_W32(phy, DSIPHY_CMN_RBUF_CTRL, 0x1);
	/* ensure that the FIFO is toggled back on */
	wmb();
}

void dsi_phy_hw_v4_0_reset_clk_en_sel(struct dsi_phy_hw *phy)
{
	u32 data = 0;

	/*Turning off CLK_EN_SEL after retime buffer sync */
	data = DSI_R32(phy, DSIPHY_CMN_CLK_CFG1);
	data &= ~BIT(4);
	DSI_W32(phy, DSIPHY_CMN_CLK_CFG1, data);
	/* ensure that clk_en_sel bit is turned off */
	wmb();
}

int dsi_phy_hw_v4_0_wait_for_lane_idle(
		struct dsi_phy_hw *phy, u32 lanes)
{
	int rc = 0, val = 0;
	u32 stop_state_mask = 0;
	u32 const sleep_us = 10;
	u32 const timeout_us = 100;
	bool split_link_enabled = dsi_phy_hw_v4_0_is_split_link_enabled(phy);

	stop_state_mask = BIT(4); /* clock lane */
	if (split_link_enabled)
		stop_state_mask |= BIT(5);
	if (lanes & DSI_DATA_LANE_0)
		stop_state_mask |= BIT(0);
	if (lanes & DSI_DATA_LANE_1)
		stop_state_mask |= BIT(1);
	if (lanes & DSI_DATA_LANE_2)
		stop_state_mask |= BIT(2);
	if (lanes & DSI_DATA_LANE_3)
		stop_state_mask |= BIT(3);

	DSI_PHY_DBG(phy, "polling for lanes to be in stop state, mask=0x%08x\n",
		stop_state_mask);
	rc = DSI_READ_POLL_TIMEOUT(phy, DSIPHY_CMN_LANE_STATUS1, val,
				((val & stop_state_mask) == stop_state_mask),
				sleep_us, timeout_us);
	if (rc) {
		DSI_PHY_ERR(phy, "lanes not in stop state, LANE_STATUS=0x%08x\n",
			val);
		return rc;
	}

	return 0;
}

void dsi_phy_hw_v4_0_ulps_request(struct dsi_phy_hw *phy,
		struct dsi_phy_cfg *cfg, u32 lanes)
{
	u32 reg = 0, sl_lane_ctrl1 = 0;

	if (lanes & DSI_CLOCK_LANE)
		reg = BIT(4);
	if (lanes & DSI_DATA_LANE_0)
		reg |= BIT(0);
	if (lanes & DSI_DATA_LANE_1)
		reg |= BIT(1);
	if (lanes & DSI_DATA_LANE_2)
		reg |= BIT(2);
	if (lanes & DSI_DATA_LANE_3)
		reg |= BIT(3);
	if (cfg->split_link.enabled)
		reg |= BIT(7);

	if (cfg->force_clk_lane_hs) {
		reg |= BIT(5) | BIT(6);
		if (cfg->split_link.enabled) {
			sl_lane_ctrl1 = DSI_R32(phy, DSIPHY_CMN_SL_DSI_LANE_CTRL1);
			sl_lane_ctrl1 |= BIT(2);
			DSI_W32(phy, DSIPHY_CMN_SL_DSI_LANE_CTRL1, sl_lane_ctrl1);
		}
	}

	/*
	 * ULPS entry request. Wait for short time to make sure
	 * that the lanes enter ULPS. Recommended as per HPG.
	 */
	DSI_W32(phy, DSIPHY_CMN_LANE_CTRL1, reg);
	usleep_range(100, 110);

	/* disable LPRX and CDRX */
	dsi_phy_hw_v4_0_config_lpcdrx(phy, cfg, false);

	DSI_PHY_DBG(phy, "ULPS requested for lanes 0x%x\n", lanes);
}

int dsi_phy_hw_v4_0_lane_reset(struct dsi_phy_hw *phy)
{
	int ret = 0, loop = 10, u_dly = 200;
	u32 ln_status = 0;

	while ((ln_status != 0x1f) && loop) {
		DSI_W32(phy, DSIPHY_CMN_LANE_CTRL3, 0x1f);
		wmb(); /* ensure register is committed */
		loop--;
		udelay(u_dly);
		ln_status = DSI_R32(phy, DSIPHY_CMN_LANE_STATUS1);
		DSI_PHY_DBG(phy, "trial no: %d\n", loop);
	}

	if (!loop)
		DSI_PHY_DBG(phy, "could not reset phy lanes\n");

	DSI_W32(phy, DSIPHY_CMN_LANE_CTRL3, 0x0);
	wmb(); /* ensure register is committed */

	return ret;
}

void dsi_phy_hw_v4_0_ulps_exit(struct dsi_phy_hw *phy,
			struct dsi_phy_cfg *cfg, u32 lanes)
{
	u32 reg = 0, sl_lane_ctrl1 = 0;

	if (lanes & DSI_CLOCK_LANE)
		reg = BIT(4);
	if (lanes & DSI_DATA_LANE_0)
		reg |= BIT(0);
	if (lanes & DSI_DATA_LANE_1)
		reg |= BIT(1);
	if (lanes & DSI_DATA_LANE_2)
		reg |= BIT(2);
	if (lanes & DSI_DATA_LANE_3)
		reg |= BIT(3);
	if (cfg->split_link.enabled)
		reg |= BIT(5);

	/* enable LPRX and CDRX */
	dsi_phy_hw_v4_0_config_lpcdrx(phy, cfg, true);

	/* ULPS exit request */
	DSI_W32(phy, DSIPHY_CMN_LANE_CTRL2, reg);
	usleep_range(1000, 1010);

	/* Clear ULPS request flags on all lanes */
	DSI_W32(phy, DSIPHY_CMN_LANE_CTRL1, 0);
	/* Clear ULPS exit flags on all lanes */
	DSI_W32(phy, DSIPHY_CMN_LANE_CTRL2, 0);

	/*
	 * Sometimes when exiting ULPS, it is possible that some DSI
	 * lanes are not in the stop state which could lead to DSI
	 * commands not going through. To avoid this, force the lanes
	 * to be in stop state.
	 */
	DSI_W32(phy, DSIPHY_CMN_LANE_CTRL3, reg);
	DSI_W32(phy, DSIPHY_CMN_LANE_CTRL3, 0);
	usleep_range(100, 110);

	if (cfg->force_clk_lane_hs) {
		reg = BIT(5) | BIT(6);
		DSI_W32(phy, DSIPHY_CMN_LANE_CTRL1, reg);
		if (cfg->split_link.enabled) {
			sl_lane_ctrl1 = DSI_R32(phy, DSIPHY_CMN_SL_DSI_LANE_CTRL1);
			sl_lane_ctrl1 |= BIT(2);
			DSI_W32(phy, DSIPHY_CMN_SL_DSI_LANE_CTRL1, sl_lane_ctrl1);
		}
	}
}

u32 dsi_phy_hw_v4_0_get_lanes_in_ulps(struct dsi_phy_hw *phy)
{
	u32 lanes = 0;

	lanes = DSI_R32(phy, DSIPHY_CMN_LANE_STATUS0);
	DSI_PHY_DBG(phy, "lanes in ulps = 0x%x\n", lanes);
	return lanes;
}

bool dsi_phy_hw_v4_0_is_lanes_in_ulps(u32 lanes, u32 ulps_lanes)
{
	if (lanes & ulps_lanes)
		return false;

	return true;
}

int dsi_phy_hw_timing_val_v4_0(struct dsi_phy_per_lane_cfgs *timing_cfg,
		u32 *timing_val, u32 size)
{
	int i = 0;

	if (size != DSI_PHY_TIMING_V4_SIZE) {
		DSI_ERR("Unexpected timing array size %d\n", size);
		return -EINVAL;
	}

	for (i = 0; i < size; i++)
		timing_cfg->lane_v4[i] = timing_val[i];
	return 0;
}

void dsi_phy_hw_v4_0_dyn_refresh_config(struct dsi_phy_hw *phy,
					struct dsi_phy_cfg *cfg, bool is_master)
{
	u32 reg;
	bool is_cphy = (cfg->phy_type == DSI_PHY_TYPE_CPHY) ?
			true : false;

	if (is_master) {
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL19,
			  DSIPHY_CMN_TIMING_CTRL_0, DSIPHY_CMN_TIMING_CTRL_1,
			  cfg->timing.lane_v4[0], cfg->timing.lane_v4[1]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL20,
			  DSIPHY_CMN_TIMING_CTRL_2, DSIPHY_CMN_TIMING_CTRL_3,
			  cfg->timing.lane_v4[2], cfg->timing.lane_v4[3]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL21,
			  DSIPHY_CMN_TIMING_CTRL_4, DSIPHY_CMN_TIMING_CTRL_5,
			  cfg->timing.lane_v4[4], cfg->timing.lane_v4[5]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL22,
			  DSIPHY_CMN_TIMING_CTRL_6, DSIPHY_CMN_TIMING_CTRL_7,
			  cfg->timing.lane_v4[6], cfg->timing.lane_v4[7]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL23,
			  DSIPHY_CMN_TIMING_CTRL_8, DSIPHY_CMN_TIMING_CTRL_9,
			  cfg->timing.lane_v4[8], cfg->timing.lane_v4[9]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL24,
			  DSIPHY_CMN_TIMING_CTRL_10, DSIPHY_CMN_TIMING_CTRL_11,
			  cfg->timing.lane_v4[10], cfg->timing.lane_v4[11]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL25,
			  DSIPHY_CMN_TIMING_CTRL_12, DSIPHY_CMN_TIMING_CTRL_13,
			  cfg->timing.lane_v4[12], cfg->timing.lane_v4[13]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL26,
			  DSIPHY_CMN_CTRL_0, DSIPHY_CMN_LANE_CTRL0,
			  0x7f, is_cphy ? 0x17 : 0x1f);

	} else {
		reg = DSI_R32(phy, DSIPHY_CMN_CLK_CFG1);
		reg &= ~BIT(5);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL0,
			  DSIPHY_CMN_CLK_CFG1, DSIPHY_CMN_PLL_CNTRL,
			  reg, 0x0);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL1,
			  DSIPHY_CMN_RBUF_CTRL, DSIPHY_CMN_TIMING_CTRL_0,
			  0x0, cfg->timing.lane_v4[0]);

		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL2,
			  DSIPHY_CMN_TIMING_CTRL_1, DSIPHY_CMN_TIMING_CTRL_2,
			  cfg->timing.lane_v4[1], cfg->timing.lane_v4[2]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL3,
			  DSIPHY_CMN_TIMING_CTRL_3, DSIPHY_CMN_TIMING_CTRL_4,
			  cfg->timing.lane_v4[3], cfg->timing.lane_v4[4]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL4,
			  DSIPHY_CMN_TIMING_CTRL_5, DSIPHY_CMN_TIMING_CTRL_6,
			  cfg->timing.lane_v4[5], cfg->timing.lane_v4[6]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL5,
			  DSIPHY_CMN_TIMING_CTRL_7, DSIPHY_CMN_TIMING_CTRL_8,
			  cfg->timing.lane_v4[7], cfg->timing.lane_v4[8]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL6,
			  DSIPHY_CMN_TIMING_CTRL_9, DSIPHY_CMN_TIMING_CTRL_10,
			  cfg->timing.lane_v4[9], cfg->timing.lane_v4[10]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL7,
			  DSIPHY_CMN_TIMING_CTRL_11, DSIPHY_CMN_TIMING_CTRL_12,
			  cfg->timing.lane_v4[11], cfg->timing.lane_v4[12]);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL8,
			  DSIPHY_CMN_TIMING_CTRL_13, DSIPHY_CMN_CTRL_0,
			  cfg->timing.lane_v4[13], 0x7f);
		DSI_DYN_REF_REG_W(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_CTRL9,
			  DSIPHY_CMN_LANE_CTRL0, DSIPHY_CMN_CTRL_2,
			  is_cphy ? 0x17 : 0x1f, 0x40);
		/*
		 * fill with dummy register writes since controller will blindly
		 * send these values to DSI PHY.
		 */
		reg = DSI_DYN_REFRESH_PLL_CTRL11;
		while (reg <= DSI_DYN_REFRESH_PLL_CTRL29) {
			DSI_DYN_REF_REG_W(phy->dyn_pll_base, reg,
				  DSIPHY_CMN_LANE_CTRL0, DSIPHY_CMN_CTRL_0,
				  is_cphy ? 0x17 : 0x1f, 0x7f);
			reg += 0x4;
		}

		DSI_GEN_W32(phy->dyn_pll_base,
			    DSI_DYN_REFRESH_PLL_UPPER_ADDR, 0);
		DSI_GEN_W32(phy->dyn_pll_base,
			    DSI_DYN_REFRESH_PLL_UPPER_ADDR2, 0);
	}

	wmb(); /* make sure all registers are updated */
}

void dsi_phy_hw_v4_0_dyn_refresh_pipe_delay(struct dsi_phy_hw *phy,
					    struct dsi_dyn_clk_delay *delay)
{
	if (!delay)
		return;

	DSI_GEN_W32(phy->dyn_pll_base, DSI_DYN_REFRESH_PIPE_DELAY,
		    delay->pipe_delay);
	DSI_GEN_W32(phy->dyn_pll_base, DSI_DYN_REFRESH_PIPE_DELAY2,
		    delay->pipe_delay2);
	DSI_GEN_W32(phy->dyn_pll_base, DSI_DYN_REFRESH_PLL_DELAY,
		    delay->pll_delay);
}

void dsi_phy_hw_v4_0_dyn_refresh_trigger_sel(struct dsi_phy_hw *phy,
		bool is_master)
{
	u32 reg;

	/*
	 * Dynamic refresh will take effect at next mdp flush event.
	 * This makes sure that any update to frame timings together
	 * with dfps will take effect in one vsync at next mdp flush.
	 */
	if (is_master) {
		reg = DSI_GEN_R32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL);
		reg |= BIT(17);
		DSI_GEN_W32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL, reg);
	}
}

void dsi_phy_hw_v4_0_dyn_refresh_helper(struct dsi_phy_hw *phy, u32 offset)
{
	u32 reg;

	/*
	 * if no offset is mentioned then this means we want to clear
	 * the dynamic refresh ctrl register which is the last step
	 * of dynamic refresh sequence.
	 */
	if (!offset) {
		reg = DSI_GEN_R32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL);
		reg &= ~(BIT(0) | BIT(8) | BIT(13) | BIT(16) | BIT(17));
		DSI_GEN_W32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL, reg);
		wmb(); /* ensure dynamic fps is cleared */
		return;
	}

	if (offset & BIT(DYN_REFRESH_INTF_SEL)) {
		reg = DSI_GEN_R32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL);
		reg |= BIT(13);
		DSI_GEN_W32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL, reg);
	}

	if (offset & BIT(DYN_REFRESH_SYNC_MODE)) {
		reg = DSI_GEN_R32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL);
		reg |= BIT(16);
		DSI_GEN_W32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL, reg);
	}

	if (offset & BIT(DYN_REFRESH_SWI_CTRL)) {
		reg = DSI_GEN_R32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL);
		reg |= BIT(0);
		DSI_GEN_W32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL, reg);
	}

	if (offset & BIT(DYN_REFRESH_SW_TRIGGER)) {
		reg = DSI_GEN_R32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL);
		reg |= BIT(8);
		DSI_GEN_W32(phy->dyn_pll_base, DSI_DYN_REFRESH_CTRL, reg);
		wmb(); /* ensure dynamic fps is triggered */
	}
}

int dsi_phy_hw_v4_0_cache_phy_timings(struct dsi_phy_per_lane_cfgs *timings,
				      u32 *dst, u32 size)
{
	int i;

	if (!timings || !dst || !size)
		return -EINVAL;

	if (size != DSI_PHY_TIMING_V4_SIZE) {
		DSI_ERR("size mis-match\n");
		return -EINVAL;
	}

	for (i = 0; i < size; i++)
		dst[i] = timings->lane_v4[i];

	return 0;
}

void dsi_phy_hw_v4_0_set_continuous_clk(struct dsi_phy_hw *phy, bool enable)
{
	u32 reg = 0, sl_lane_ctrl1 = 0;
	bool is_split_link_enabled = dsi_phy_hw_v4_0_is_split_link_enabled(phy);

	reg = DSI_R32(phy, DSIPHY_CMN_LANE_CTRL1);

	if (enable)
		reg |= BIT(5) | BIT(6);
	else
		reg &= ~(BIT(5) | BIT(6));

	DSI_W32(phy, DSIPHY_CMN_LANE_CTRL1, reg);

	if (is_split_link_enabled) {
		sl_lane_ctrl1 = DSI_R32(phy, DSIPHY_CMN_SL_DSI_LANE_CTRL1);
		if (enable)
			sl_lane_ctrl1 |= BIT(2);
		else
			sl_lane_ctrl1 &= ~BIT(2);
		DSI_W32(phy, DSIPHY_CMN_SL_DSI_LANE_CTRL1, sl_lane_ctrl1);
	}

	wmb(); /* make sure request is set */
}