pll/dp_pll_10nm_util.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
 */

#define pr_fmt(fmt)	"%s: " fmt, __func__

#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/iopoll.h>
#include <linux/delay.h>
#include <linux/usb/usbpd.h>

#include "pll_drv.h"
#include "dp_pll.h"
#include "dp_pll_10nm.h"

#define DP_PHY_REVISION_ID0			0x0000
#define DP_PHY_REVISION_ID1			0x0004
#define DP_PHY_REVISION_ID2			0x0008
#define DP_PHY_REVISION_ID3			0x000C

#define DP_PHY_CFG				0x0010
#define DP_PHY_PD_CTL				0x0018
#define DP_PHY_MODE				0x001C

#define DP_PHY_AUX_CFG0				0x0020
#define DP_PHY_AUX_CFG1				0x0024
#define DP_PHY_AUX_CFG2				0x0028
#define DP_PHY_AUX_CFG3				0x002C
#define DP_PHY_AUX_CFG4				0x0030
#define DP_PHY_AUX_CFG5				0x0034
#define DP_PHY_AUX_CFG6				0x0038
#define DP_PHY_AUX_CFG7				0x003C
#define DP_PHY_AUX_CFG8				0x0040
#define DP_PHY_AUX_CFG9				0x0044
#define DP_PHY_AUX_INTERRUPT_MASK		0x0048
#define DP_PHY_AUX_INTERRUPT_CLEAR		0x004C
#define DP_PHY_AUX_BIST_CFG			0x0050

#define DP_PHY_VCO_DIV				0x0064
#define DP_PHY_TX0_TX1_LANE_CTL			0x006C
#define DP_PHY_TX2_TX3_LANE_CTL			0x0088

#define DP_PHY_SPARE0				0x00AC
#define DP_PHY_STATUS				0x00C0

/* Tx registers */
#define TXn_BIST_MODE_LANENO			0x0000
#define TXn_CLKBUF_ENABLE			0x0008
#define TXn_TX_EMP_POST1_LVL			0x000C

#define TXn_TX_DRV_LVL				0x001C

#define TXn_RESET_TSYNC_EN			0x0024
#define TXn_PRE_STALL_LDO_BOOST_EN		0x0028
#define TXn_TX_BAND				0x002C
#define TXn_SLEW_CNTL				0x0030
#define TXn_INTERFACE_SELECT			0x0034

#define TXn_RES_CODE_LANE_TX			0x003C
#define TXn_RES_CODE_LANE_RX			0x0040
#define TXn_RES_CODE_LANE_OFFSET_TX		0x0044
#define TXn_RES_CODE_LANE_OFFSET_RX		0x0048

#define TXn_DEBUG_BUS_SEL			0x0058
#define TXn_TRANSCEIVER_BIAS_EN			0x005C
#define TXn_HIGHZ_DRVR_EN			0x0060
#define TXn_TX_POL_INV				0x0064
#define TXn_PARRATE_REC_DETECT_IDLE_EN		0x0068

#define TXn_LANE_MODE_1				0x008C

#define TXn_TRAN_DRVR_EMP_EN			0x00C0
#define TXn_TX_INTERFACE_MODE			0x00C4

#define TXn_VMODE_CTRL1				0x00F0

/* PLL register offset */
#define QSERDES_COM_ATB_SEL1			0x0000
#define QSERDES_COM_ATB_SEL2			0x0004
#define QSERDES_COM_FREQ_UPDATE			0x0008
#define QSERDES_COM_BG_TIMER			0x000C
#define QSERDES_COM_SSC_EN_CENTER		0x0010
#define QSERDES_COM_SSC_ADJ_PER1		0x0014
#define QSERDES_COM_SSC_ADJ_PER2		0x0018
#define QSERDES_COM_SSC_PER1			0x001C
#define QSERDES_COM_SSC_PER2			0x0020
#define QSERDES_COM_SSC_STEP_SIZE1		0x0024
#define QSERDES_COM_SSC_STEP_SIZE2		0x0028
#define QSERDES_COM_POST_DIV			0x002C
#define QSERDES_COM_POST_DIV_MUX		0x0030
#define QSERDES_COM_BIAS_EN_CLKBUFLR_EN		0x0034
#define QSERDES_COM_CLK_ENABLE1			0x0038
#define QSERDES_COM_SYS_CLK_CTRL		0x003C
#define QSERDES_COM_SYSCLK_BUF_ENABLE		0x0040
#define QSERDES_COM_PLL_EN			0x0044
#define QSERDES_COM_PLL_IVCO			0x0048
#define QSERDES_COM_CMN_IETRIM			0x004C
#define QSERDES_COM_CMN_IPTRIM			0x0050

#define QSERDES_COM_CP_CTRL_MODE0		0x0060
#define QSERDES_COM_CP_CTRL_MODE1		0x0064
#define QSERDES_COM_PLL_RCTRL_MODE0		0x0068
#define QSERDES_COM_PLL_RCTRL_MODE1		0x006C
#define QSERDES_COM_PLL_CCTRL_MODE0		0x0070
#define QSERDES_COM_PLL_CCTRL_MODE1		0x0074
#define QSERDES_COM_PLL_CNTRL			0x0078
#define QSERDES_COM_BIAS_EN_CTRL_BY_PSM		0x007C
#define QSERDES_COM_SYSCLK_EN_SEL		0x0080
#define QSERDES_COM_CML_SYSCLK_SEL		0x0084
#define QSERDES_COM_RESETSM_CNTRL		0x0088
#define QSERDES_COM_RESETSM_CNTRL2		0x008C
#define QSERDES_COM_LOCK_CMP_EN			0x0090
#define QSERDES_COM_LOCK_CMP_CFG		0x0094
#define QSERDES_COM_LOCK_CMP1_MODE0		0x0098
#define QSERDES_COM_LOCK_CMP2_MODE0		0x009C
#define QSERDES_COM_LOCK_CMP3_MODE0		0x00A0

#define QSERDES_COM_DEC_START_MODE0		0x00B0
#define QSERDES_COM_DEC_START_MODE1		0x00B4
#define QSERDES_COM_DIV_FRAC_START1_MODE0	0x00B8
#define QSERDES_COM_DIV_FRAC_START2_MODE0	0x00BC
#define QSERDES_COM_DIV_FRAC_START3_MODE0	0x00C0
#define QSERDES_COM_DIV_FRAC_START1_MODE1	0x00C4
#define QSERDES_COM_DIV_FRAC_START2_MODE1	0x00C8
#define QSERDES_COM_DIV_FRAC_START3_MODE1	0x00CC
#define QSERDES_COM_INTEGLOOP_INITVAL		0x00D0
#define QSERDES_COM_INTEGLOOP_EN		0x00D4
#define QSERDES_COM_INTEGLOOP_GAIN0_MODE0	0x00D8
#define QSERDES_COM_INTEGLOOP_GAIN1_MODE0	0x00DC
#define QSERDES_COM_INTEGLOOP_GAIN0_MODE1	0x00E0
#define QSERDES_COM_INTEGLOOP_GAIN1_MODE1	0x00E4
#define QSERDES_COM_VCOCAL_DEADMAN_CTRL		0x00E8
#define QSERDES_COM_VCO_TUNE_CTRL		0x00EC
#define QSERDES_COM_VCO_TUNE_MAP		0x00F0

#define QSERDES_COM_CMN_STATUS			0x0124
#define QSERDES_COM_RESET_SM_STATUS		0x0128

#define QSERDES_COM_CLK_SEL			0x0138
#define QSERDES_COM_HSCLK_SEL			0x013C

#define QSERDES_COM_CORECLK_DIV_MODE0		0x0148

#define QSERDES_COM_SW_RESET			0x0150
#define QSERDES_COM_CORE_CLK_EN			0x0154
#define QSERDES_COM_C_READY_STATUS		0x0158
#define QSERDES_COM_CMN_CONFIG			0x015C

#define QSERDES_COM_SVS_MODE_CLK_SEL		0x0164

#define DP_PHY_PLL_POLL_SLEEP_US		500
#define DP_PHY_PLL_POLL_TIMEOUT_US		10000

#define DP_VCO_RATE_8100MHZDIV1000		8100000UL
#define DP_VCO_RATE_9720MHZDIV1000		9720000UL
#define DP_VCO_RATE_10800MHZDIV1000		10800000UL

int dp_mux_set_parent_10nm(void *context, unsigned int reg, unsigned int val)
{
	struct mdss_pll_resources *dp_res = context;
	int rc;
	u32 auxclk_div;

	rc = mdss_pll_resource_enable(dp_res, true);
	if (rc) {
		pr_err("Failed to enable mdss DP PLL resources\n");
		return rc;
	}

	auxclk_div = MDSS_PLL_REG_R(dp_res->phy_base, DP_PHY_VCO_DIV);
	auxclk_div &= ~0x03;	/* bits 0 to 1 */

	if (val == 0) /* mux parent index = 0 */
		auxclk_div |= 1;
	else if (val == 1) /* mux parent index = 1 */
		auxclk_div |= 2;
	else if (val == 2) /* mux parent index = 2 */
		auxclk_div |= 0;

	MDSS_PLL_REG_W(dp_res->phy_base,
			DP_PHY_VCO_DIV, auxclk_div);
	/* Make sure the PHY registers writes are done */
	wmb();
	pr_debug("%s: mux=%d auxclk_div=%x\n", __func__, val, auxclk_div);

	mdss_pll_resource_enable(dp_res, false);

	return 0;
}

int dp_mux_get_parent_10nm(void *context, unsigned int reg, unsigned int *val)
{
	int rc;
	u32 auxclk_div = 0;
	struct mdss_pll_resources *dp_res = context;

	rc = mdss_pll_resource_enable(dp_res, true);
	if (rc) {
		pr_err("Failed to enable dp_res resources\n");
		return rc;
	}

	auxclk_div = MDSS_PLL_REG_R(dp_res->phy_base, DP_PHY_VCO_DIV);
	auxclk_div &= 0x03;

	if (auxclk_div == 1) /* Default divider */
		*val = 0;
	else if (auxclk_div == 2)
		*val = 1;
	else if (auxclk_div == 0)
		*val = 2;

	mdss_pll_resource_enable(dp_res, false);

	pr_debug("%s: auxclk_div=%d, val=%d\n", __func__, auxclk_div, *val);

	return 0;
}

static int dp_vco_pll_init_db_10nm(struct dp_pll_db *pdb,
		unsigned long rate)
{
	struct mdss_pll_resources *dp_res = pdb->pll;
	u32 spare_value = 0;

	spare_value = MDSS_PLL_REG_R(dp_res->phy_base, DP_PHY_SPARE0);
	pdb->lane_cnt = spare_value & 0x0F;
	pdb->orientation = (spare_value & 0xF0) >> 4;

	pr_debug("%s: spare_value=0x%x, ln_cnt=0x%x, orientation=0x%x\n",
			__func__, spare_value, pdb->lane_cnt, pdb->orientation);

	switch (rate) {
	case DP_VCO_HSCLK_RATE_1620MHZDIV1000:
		pr_debug("%s: VCO rate: %ld\n", __func__,
				DP_VCO_RATE_9720MHZDIV1000);
		pdb->hsclk_sel = 0x0c;
		pdb->dec_start_mode0 = 0x69;
		pdb->div_frac_start1_mode0 = 0x00;
		pdb->div_frac_start2_mode0 = 0x80;
		pdb->div_frac_start3_mode0 = 0x07;
		pdb->integloop_gain0_mode0 = 0x3f;
		pdb->integloop_gain1_mode0 = 0x00;
		pdb->vco_tune_map = 0x00;
		pdb->lock_cmp1_mode0 = 0x6f;
		pdb->lock_cmp2_mode0 = 0x08;
		pdb->lock_cmp3_mode0 = 0x00;
		pdb->phy_vco_div = 0x1;
		pdb->lock_cmp_en = 0x00;
		break;
	case DP_VCO_HSCLK_RATE_2700MHZDIV1000:
		pr_debug("%s: VCO rate: %ld\n", __func__,
				DP_VCO_RATE_10800MHZDIV1000);
		pdb->hsclk_sel = 0x04;
		pdb->dec_start_mode0 = 0x69;
		pdb->div_frac_start1_mode0 = 0x00;
		pdb->div_frac_start2_mode0 = 0x80;
		pdb->div_frac_start3_mode0 = 0x07;
		pdb->integloop_gain0_mode0 = 0x3f;
		pdb->integloop_gain1_mode0 = 0x00;
		pdb->vco_tune_map = 0x00;
		pdb->lock_cmp1_mode0 = 0x0f;
		pdb->lock_cmp2_mode0 = 0x0e;
		pdb->lock_cmp3_mode0 = 0x00;
		pdb->phy_vco_div = 0x1;
		pdb->lock_cmp_en = 0x00;
		break;
	case DP_VCO_HSCLK_RATE_5400MHZDIV1000:
		pr_debug("%s: VCO rate: %ld\n", __func__,
				DP_VCO_RATE_10800MHZDIV1000);
		pdb->hsclk_sel = 0x00;
		pdb->dec_start_mode0 = 0x8c;
		pdb->div_frac_start1_mode0 = 0x00;
		pdb->div_frac_start2_mode0 = 0x00;
		pdb->div_frac_start3_mode0 = 0x0a;
		pdb->integloop_gain0_mode0 = 0x3f;
		pdb->integloop_gain1_mode0 = 0x00;
		pdb->vco_tune_map = 0x00;
		pdb->lock_cmp1_mode0 = 0x1f;
		pdb->lock_cmp2_mode0 = 0x1c;
		pdb->lock_cmp3_mode0 = 0x00;
		pdb->phy_vco_div = 0x2;
		pdb->lock_cmp_en = 0x00;
		break;
	case DP_VCO_HSCLK_RATE_8100MHZDIV1000:
		pr_debug("%s: VCO rate: %ld\n", __func__,
				DP_VCO_RATE_8100MHZDIV1000);
		pdb->hsclk_sel = 0x03;
		pdb->dec_start_mode0 = 0x69;
		pdb->div_frac_start1_mode0 = 0x00;
		pdb->div_frac_start2_mode0 = 0x80;
		pdb->div_frac_start3_mode0 = 0x07;
		pdb->integloop_gain0_mode0 = 0x3f;
		pdb->integloop_gain1_mode0 = 0x00;
		pdb->vco_tune_map = 0x00;
		pdb->lock_cmp1_mode0 = 0x2f;
		pdb->lock_cmp2_mode0 = 0x2a;
		pdb->lock_cmp3_mode0 = 0x00;
		pdb->phy_vco_div = 0x0;
		pdb->lock_cmp_en = 0x08;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int dp_config_vco_rate_10nm(struct dp_pll_vco_clk *vco,
		unsigned long rate)
{
	u32 res = 0;
	struct mdss_pll_resources *dp_res = vco->priv;
	struct dp_pll_db *pdb = (struct dp_pll_db *)dp_res->priv;

	res = dp_vco_pll_init_db_10nm(pdb, rate);
	if (res) {
		pr_err("VCO Init DB failed\n");
		return res;
	}

	if (pdb->lane_cnt != 4) {
		if (pdb->orientation == ORIENTATION_CC2)
			MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_PD_CTL, 0x6d);
		else
			MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_PD_CTL, 0x75);
	} else {
		MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_PD_CTL, 0x7d);
	}

	/* Make sure the PHY register writes are done */
	wmb();

	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_SVS_MODE_CLK_SEL, 0x01);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_SYSCLK_EN_SEL, 0x37);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_SYS_CLK_CTRL, 0x02);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_CLK_ENABLE1, 0x0e);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_SYSCLK_BUF_ENABLE, 0x06);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_CLK_SEL, 0x30);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_CMN_CONFIG, 0x02);

	/* Different for each clock rates */
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_HSCLK_SEL, pdb->hsclk_sel);
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_DEC_START_MODE0, pdb->dec_start_mode0);
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_DIV_FRAC_START1_MODE0, pdb->div_frac_start1_mode0);
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_DIV_FRAC_START2_MODE0, pdb->div_frac_start2_mode0);
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_DIV_FRAC_START3_MODE0, pdb->div_frac_start3_mode0);
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_INTEGLOOP_GAIN0_MODE0, pdb->integloop_gain0_mode0);
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_INTEGLOOP_GAIN1_MODE0, pdb->integloop_gain1_mode0);
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_VCO_TUNE_MAP, pdb->vco_tune_map);
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_LOCK_CMP1_MODE0, pdb->lock_cmp1_mode0);
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_LOCK_CMP2_MODE0, pdb->lock_cmp2_mode0);
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_LOCK_CMP3_MODE0, pdb->lock_cmp3_mode0);
	/* Make sure the PLL register writes are done */
	wmb();

	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_BG_TIMER, 0x0a);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_CORECLK_DIV_MODE0, 0x0a);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_VCO_TUNE_CTRL, 0x00);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x3f);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_CORE_CLK_EN, 0x1f);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_PLL_IVCO, 0x07);
	MDSS_PLL_REG_W(dp_res->pll_base,
		QSERDES_COM_LOCK_CMP_EN, pdb->lock_cmp_en);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_PLL_CCTRL_MODE0, 0x36);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_PLL_RCTRL_MODE0, 0x16);
	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_CP_CTRL_MODE0, 0x06);
	/* Make sure the PHY register writes are done */
	wmb();

	if (pdb->orientation == ORIENTATION_CC2)
		MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_MODE, 0x4c);
	else
		MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_MODE, 0x5c);
	/* Make sure the PLL register writes are done */
	wmb();

	/* TX Lane configuration */
	MDSS_PLL_REG_W(dp_res->phy_base,
			DP_PHY_TX0_TX1_LANE_CTL, 0x05);
	MDSS_PLL_REG_W(dp_res->phy_base,
			DP_PHY_TX2_TX3_LANE_CTL, 0x05);

	/* TX-0 register configuration */
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_TRANSCEIVER_BIAS_EN, 0x1a);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_VMODE_CTRL1, 0x40);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_PRE_STALL_LDO_BOOST_EN, 0x30);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_INTERFACE_SELECT, 0x3d);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_CLKBUF_ENABLE, 0x0f);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_RESET_TSYNC_EN, 0x03);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_TRAN_DRVR_EMP_EN, 0x03);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base,
		TXn_PARRATE_REC_DETECT_IDLE_EN, 0x00);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_TX_INTERFACE_MODE, 0x00);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_TX_BAND, 0x4);

	/* TX-1 register configuration */
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_TRANSCEIVER_BIAS_EN, 0x1a);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_VMODE_CTRL1, 0x40);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_PRE_STALL_LDO_BOOST_EN, 0x30);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_INTERFACE_SELECT, 0x3d);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_CLKBUF_ENABLE, 0x0f);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_RESET_TSYNC_EN, 0x03);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_TRAN_DRVR_EMP_EN, 0x03);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base,
		TXn_PARRATE_REC_DETECT_IDLE_EN, 0x00);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_TX_INTERFACE_MODE, 0x00);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_TX_BAND, 0x4);
	/* Make sure the PHY register writes are done */
	wmb();

	/* dependent on the vco frequency */
	MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_VCO_DIV, pdb->phy_vco_div);

	return res;
}

static bool dp_10nm_pll_lock_status(struct mdss_pll_resources *dp_res)
{
	u32 status;
	bool pll_locked;

	/* poll for PLL lock status */
	if (readl_poll_timeout_atomic((dp_res->pll_base +
			QSERDES_COM_C_READY_STATUS),
			status,
			((status & BIT(0)) > 0),
			DP_PHY_PLL_POLL_SLEEP_US,
			DP_PHY_PLL_POLL_TIMEOUT_US)) {
		pr_err("%s: C_READY status is not high. Status=%x\n",
				__func__, status);
		pll_locked = false;
	} else {
		pll_locked = true;
	}

	return pll_locked;
}

static bool dp_10nm_phy_rdy_status(struct mdss_pll_resources *dp_res)
{
	u32 status;
	bool phy_ready = true;

	/* poll for PHY ready status */
	if (readl_poll_timeout_atomic((dp_res->phy_base +
			DP_PHY_STATUS),
			status,
			((status & (BIT(1))) > 0),
			DP_PHY_PLL_POLL_SLEEP_US,
			DP_PHY_PLL_POLL_TIMEOUT_US)) {
		pr_err("%s: Phy_ready is not high. Status=%x\n",
				__func__, status);
		phy_ready = false;
	}

	return phy_ready;
}

static int dp_pll_enable_10nm(struct clk_hw *hw)
{
	int rc = 0;
	struct dp_pll_vco_clk *vco = to_dp_vco_hw(hw);
	struct mdss_pll_resources *dp_res = vco->priv;
	struct dp_pll_db *pdb = (struct dp_pll_db *)dp_res->priv;
	u32 bias_en, drvr_en;

	MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_AUX_CFG2, 0x04);
	MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_CFG, 0x01);
	MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_CFG, 0x05);
	MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_CFG, 0x01);
	MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_CFG, 0x09);
	wmb(); /* Make sure the PHY register writes are done */

	MDSS_PLL_REG_W(dp_res->pll_base, QSERDES_COM_RESETSM_CNTRL, 0x20);
	wmb();	/* Make sure the PLL register writes are done */

	if (!dp_10nm_pll_lock_status(dp_res)) {
		rc = -EINVAL;
		goto lock_err;
	}

	MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_CFG, 0x19);
	/* Make sure the PHY register writes are done */
	wmb();
	/* poll for PHY ready status */
	if (!dp_10nm_phy_rdy_status(dp_res)) {
		rc = -EINVAL;
		goto lock_err;
	}

	pr_debug("%s: PLL is locked\n", __func__);

	if (pdb->lane_cnt == 1) {
		bias_en = 0x3e;
		drvr_en = 0x13;
	} else {
		bias_en = 0x3f;
		drvr_en = 0x10;
	}

	if (pdb->lane_cnt != 4) {
		if (pdb->orientation == ORIENTATION_CC1) {
			MDSS_PLL_REG_W(dp_res->ln_tx1_base,
				TXn_HIGHZ_DRVR_EN, drvr_en);
			MDSS_PLL_REG_W(dp_res->ln_tx1_base,
				TXn_TRANSCEIVER_BIAS_EN, bias_en);
		} else {
			MDSS_PLL_REG_W(dp_res->ln_tx0_base,
				TXn_HIGHZ_DRVR_EN, drvr_en);
			MDSS_PLL_REG_W(dp_res->ln_tx0_base,
				TXn_TRANSCEIVER_BIAS_EN, bias_en);
		}
	} else {
		MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_HIGHZ_DRVR_EN, drvr_en);
		MDSS_PLL_REG_W(dp_res->ln_tx0_base,
			TXn_TRANSCEIVER_BIAS_EN, bias_en);
		MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_HIGHZ_DRVR_EN, drvr_en);
		MDSS_PLL_REG_W(dp_res->ln_tx1_base,
			TXn_TRANSCEIVER_BIAS_EN, bias_en);
	}

	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_TX_POL_INV, 0x0a);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_TX_POL_INV, 0x0a);
	MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_CFG, 0x18);
	udelay(2000);

	MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_CFG, 0x19);

	/*
	 * Make sure all the register writes are completed before
	 * doing any other operation
	 */
	wmb();

	/* poll for PHY ready status */
	if (!dp_10nm_phy_rdy_status(dp_res)) {
		rc = -EINVAL;
		goto lock_err;
	}

	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_TX_DRV_LVL, 0x38);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_TX_DRV_LVL, 0x38);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_TX_EMP_POST1_LVL, 0x20);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_TX_EMP_POST1_LVL, 0x20);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_RES_CODE_LANE_OFFSET_TX, 0x06);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_RES_CODE_LANE_OFFSET_TX, 0x06);
	MDSS_PLL_REG_W(dp_res->ln_tx0_base, TXn_RES_CODE_LANE_OFFSET_RX, 0x07);
	MDSS_PLL_REG_W(dp_res->ln_tx1_base, TXn_RES_CODE_LANE_OFFSET_RX, 0x07);
	/* Make sure the PHY register writes are done */
	wmb();

lock_err:
	return rc;
}

static int dp_pll_disable_10nm(struct clk_hw *hw)
{
	struct dp_pll_vco_clk *vco = to_dp_vco_hw(hw);
	struct mdss_pll_resources *dp_res = vco->priv;

	/* Assert DP PHY power down */
	MDSS_PLL_REG_W(dp_res->phy_base, DP_PHY_PD_CTL, 0x2);
	/*
	 * Make sure all the register writes to disable PLL are
	 * completed before doing any other operation
	 */
	wmb();

	return 0;
}


int dp_vco_prepare_10nm(struct clk_hw *hw)
{
	int rc = 0;
	struct dp_pll_vco_clk *vco = to_dp_vco_hw(hw);
	struct mdss_pll_resources *dp_res = vco->priv;

	pr_debug("rate=%ld\n", vco->rate);
	rc = mdss_pll_resource_enable(dp_res, true);
	if (rc) {
		pr_err("Failed to enable mdss DP pll resources\n");
		goto error;
	}

	if ((dp_res->vco_cached_rate != 0)
		&& (dp_res->vco_cached_rate == vco->rate)) {
		rc = vco->hw.init->ops->set_rate(hw,
			dp_res->vco_cached_rate, dp_res->vco_cached_rate);
		if (rc) {
			pr_err("index=%d vco_set_rate failed. rc=%d\n",
				rc, dp_res->index);
			mdss_pll_resource_enable(dp_res, false);
			goto error;
		}
	}

	rc = dp_pll_enable_10nm(hw);
	if (rc) {
		mdss_pll_resource_enable(dp_res, false);
		pr_err("ndx=%d failed to enable dp pll\n",
					dp_res->index);
		goto error;
	}

	mdss_pll_resource_enable(dp_res, false);
error:
	return rc;
}

void dp_vco_unprepare_10nm(struct clk_hw *hw)
{
	struct dp_pll_vco_clk *vco = to_dp_vco_hw(hw);
	struct mdss_pll_resources *dp_res = vco->priv;

	if (!dp_res) {
		pr_err("Invalid input parameter\n");
		return;
	}

	if (!dp_res->pll_on &&
		mdss_pll_resource_enable(dp_res, true)) {
		pr_err("pll resource can't be enabled\n");
		return;
	}
	dp_res->vco_cached_rate = vco->rate;
	dp_pll_disable_10nm(hw);

	dp_res->handoff_resources = false;
	mdss_pll_resource_enable(dp_res, false);
	dp_res->pll_on = false;
}

int dp_vco_set_rate_10nm(struct clk_hw *hw, unsigned long rate,
					unsigned long parent_rate)
{
	struct dp_pll_vco_clk *vco = to_dp_vco_hw(hw);
	struct mdss_pll_resources *dp_res = vco->priv;
	int rc;

	rc = mdss_pll_resource_enable(dp_res, true);
	if (rc) {
		pr_err("pll resource can't be enabled\n");
		return rc;
	}

	pr_debug("DP lane CLK rate=%ld\n", rate);

	rc = dp_config_vco_rate_10nm(vco, rate);
	if (rc)
		pr_err("%s: Failed to set clk rate\n", __func__);

	mdss_pll_resource_enable(dp_res, false);

	vco->rate = rate;

	return 0;
}

unsigned long dp_vco_recalc_rate_10nm(struct clk_hw *hw,
					unsigned long parent_rate)
{
	struct dp_pll_vco_clk *vco = to_dp_vco_hw(hw);
	int rc;
	u32 div, hsclk_div, link_clk_div = 0;
	u64 vco_rate;
	struct mdss_pll_resources *dp_res = vco->priv;

	rc = mdss_pll_resource_enable(dp_res, true);
	if (rc) {
		pr_err("Failed to enable mdss DP pll=%d\n", dp_res->index);
		return rc;
	}

	div = MDSS_PLL_REG_R(dp_res->pll_base, QSERDES_COM_HSCLK_SEL);
	div &= 0x0f;

	if (div == 12)
		hsclk_div = 6; /* Default */
	else if (div == 4)
		hsclk_div = 4;
	else if (div == 0)
		hsclk_div = 2;
	else if (div == 3)
		hsclk_div = 1;
	else {
		pr_debug("unknown divider. forcing to default\n");
		hsclk_div = 5;
	}

	div = MDSS_PLL_REG_R(dp_res->phy_base, DP_PHY_AUX_CFG2);
	div >>= 2;

	if ((div & 0x3) == 0)
		link_clk_div = 5;
	else if ((div & 0x3) == 1)
		link_clk_div = 10;
	else if ((div & 0x3) == 2)
		link_clk_div = 20;
	else
		pr_err("%s: unsupported div. Phy_mode: %d\n", __func__, div);

	if (link_clk_div == 20) {
		vco_rate = DP_VCO_HSCLK_RATE_2700MHZDIV1000;
	} else {
		if (hsclk_div == 6)
			vco_rate = DP_VCO_HSCLK_RATE_1620MHZDIV1000;
		else if (hsclk_div == 4)
			vco_rate = DP_VCO_HSCLK_RATE_2700MHZDIV1000;
		else if (hsclk_div == 2)
			vco_rate = DP_VCO_HSCLK_RATE_5400MHZDIV1000;
		else
			vco_rate = DP_VCO_HSCLK_RATE_8100MHZDIV1000;
	}

	pr_debug("returning vco rate = %lu\n", (unsigned long)vco_rate);

	mdss_pll_resource_enable(dp_res, false);

	dp_res->vco_cached_rate = vco->rate = vco_rate;
	return (unsigned long)vco_rate;
}

long dp_vco_round_rate_10nm(struct clk_hw *hw, unsigned long rate,
			unsigned long *parent_rate)
{
	unsigned long rrate = rate;
	struct dp_pll_vco_clk *vco = to_dp_vco_hw(hw);

	if (rate <= vco->min_rate)
		rrate = vco->min_rate;
	else if (rate <= DP_VCO_HSCLK_RATE_2700MHZDIV1000)
		rrate = DP_VCO_HSCLK_RATE_2700MHZDIV1000;
	else if (rate <= DP_VCO_HSCLK_RATE_5400MHZDIV1000)
		rrate = DP_VCO_HSCLK_RATE_5400MHZDIV1000;
	else
		rrate = vco->max_rate;

	pr_debug("%s: rrate=%ld\n", __func__, rrate);

	*parent_rate = rrate;
	return rrate;
}