[PATCH] drm/msm: drop old eDP block support (again)

* [PATCH] drm/msm: drop old eDP block support (again)
@ 2022-04-30 17:57 ` Dmitry Baryshkov
  0 siblings, 0 replies; 4+ messages in thread
From: Dmitry Baryshkov @ 2022-04-30 17:57 UTC (permalink / raw)
  To: Bjorn Andersson, Rob Clark, Sean Paul, Abhinav Kumar
  Cc: Stephen Boyd, David Airlie, Daniel Vetter, linux-arm-msm,
	dri-devel, freedreno

The msm driver has dropped support for older eDP block. However the
merge conflict in the commit 4ce2ca4b374a ("drm/msm: Fix include
statements for DisplayPort") was resolved incorrectly and two files were
left in place. Drop them now (again).

Fixes: 4ce2ca4b374a ("drm/msm: Fix include statements for DisplayPort")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/edp/edp.h      |   77 --
 drivers/gpu/drm/msm/edp/edp_ctrl.c | 1373 ----------------------------
 2 files changed, 1450 deletions(-)
 delete mode 100644 drivers/gpu/drm/msm/edp/edp.h
 delete mode 100644 drivers/gpu/drm/msm/edp/edp_ctrl.c

diff --git a/drivers/gpu/drm/msm/edp/edp.h b/drivers/gpu/drm/msm/edp/edp.h
deleted file mode 100644
index 1a82d7a4af9f..000000000000
--- a/drivers/gpu/drm/msm/edp/edp.h
+++ /dev/null
@@ -1,77 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
- */
-
-#ifndef __EDP_CONNECTOR_H__
-#define __EDP_CONNECTOR_H__
-
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <drm/dp/drm_dp_helper.h>
-#include <drm/drm_bridge.h>
-#include <drm/drm_crtc.h>
-
-#include "msm_drv.h"
-
-#define edp_read(offset) msm_readl((offset))
-#define edp_write(offset, data) msm_writel((data), (offset))
-
-struct edp_ctrl;
-struct edp_aux;
-struct edp_phy;
-
-struct msm_edp {
-	struct drm_device *dev;
-	struct platform_device *pdev;
-
-	struct drm_connector *connector;
-	struct drm_bridge *bridge;
-
-	/* the encoder we are hooked to (outside of eDP block) */
-	struct drm_encoder *encoder;
-
-	struct edp_ctrl *ctrl;
-
-	int irq;
-};
-
-/* eDP bridge */
-struct drm_bridge *msm_edp_bridge_init(struct msm_edp *edp);
-void edp_bridge_destroy(struct drm_bridge *bridge);
-
-/* eDP connector */
-struct drm_connector *msm_edp_connector_init(struct msm_edp *edp);
-
-/* AUX */
-void *msm_edp_aux_init(struct msm_edp *edp, void __iomem *regbase, struct drm_dp_aux **drm_aux);
-void msm_edp_aux_destroy(struct device *dev, struct edp_aux *aux);
-irqreturn_t msm_edp_aux_irq(struct edp_aux *aux, u32 isr);
-void msm_edp_aux_ctrl(struct edp_aux *aux, int enable);
-
-/* Phy */
-bool msm_edp_phy_ready(struct edp_phy *phy);
-void msm_edp_phy_ctrl(struct edp_phy *phy, int enable);
-void msm_edp_phy_vm_pe_init(struct edp_phy *phy);
-void msm_edp_phy_vm_pe_cfg(struct edp_phy *phy, u32 v0, u32 v1);
-void msm_edp_phy_lane_power_ctrl(struct edp_phy *phy, bool up, u32 max_lane);
-void *msm_edp_phy_init(struct device *dev, void __iomem *regbase);
-
-/* Ctrl */
-irqreturn_t msm_edp_ctrl_irq(struct edp_ctrl *ctrl);
-void msm_edp_ctrl_power(struct edp_ctrl *ctrl, bool on);
-int msm_edp_ctrl_init(struct msm_edp *edp);
-void msm_edp_ctrl_destroy(struct edp_ctrl *ctrl);
-bool msm_edp_ctrl_panel_connected(struct edp_ctrl *ctrl);
-int msm_edp_ctrl_get_panel_info(struct edp_ctrl *ctrl,
-	struct drm_connector *connector, struct edid **edid);
-int msm_edp_ctrl_timing_cfg(struct edp_ctrl *ctrl,
-				const struct drm_display_mode *mode,
-				const struct drm_display_info *info);
-/* @pixel_rate is in kHz */
-bool msm_edp_ctrl_pixel_clock_valid(struct edp_ctrl *ctrl,
-	u32 pixel_rate, u32 *pm, u32 *pn);
-
-#endif /* __EDP_CONNECTOR_H__ */
diff --git a/drivers/gpu/drm/msm/edp/edp_ctrl.c b/drivers/gpu/drm/msm/edp/edp_ctrl.c
deleted file mode 100644
index 9f537b1fd849..000000000000
--- a/drivers/gpu/drm/msm/edp/edp_ctrl.c
+++ /dev/null
@@ -1,1373 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
- */
-
-#include <linux/clk.h>
-#include <linux/gpio/consumer.h>
-#include <linux/regulator/consumer.h>
-#include <drm/dp/drm_dp_helper.h>
-#include <drm/drm_crtc.h>
-#include <drm/drm_edid.h>
-
-#include "edp.h"
-#include "edp.xml.h"
-
-#define VDDA_UA_ON_LOAD		100000	/* uA units */
-#define VDDA_UA_OFF_LOAD	100	/* uA units */
-
-#define DPCD_LINK_VOLTAGE_MAX		4
-#define DPCD_LINK_PRE_EMPHASIS_MAX	4
-
-#define EDP_LINK_BW_MAX		DP_LINK_BW_2_7
-
-/* Link training return value */
-#define EDP_TRAIN_FAIL		-1
-#define EDP_TRAIN_SUCCESS	0
-#define EDP_TRAIN_RECONFIG	1
-
-#define EDP_CLK_MASK_AHB		BIT(0)
-#define EDP_CLK_MASK_AUX		BIT(1)
-#define EDP_CLK_MASK_LINK		BIT(2)
-#define EDP_CLK_MASK_PIXEL		BIT(3)
-#define EDP_CLK_MASK_MDP_CORE		BIT(4)
-#define EDP_CLK_MASK_LINK_CHAN	(EDP_CLK_MASK_LINK | EDP_CLK_MASK_PIXEL)
-#define EDP_CLK_MASK_AUX_CHAN	\
-	(EDP_CLK_MASK_AHB | EDP_CLK_MASK_AUX | EDP_CLK_MASK_MDP_CORE)
-#define EDP_CLK_MASK_ALL	(EDP_CLK_MASK_AUX_CHAN | EDP_CLK_MASK_LINK_CHAN)
-
-#define EDP_BACKLIGHT_MAX	255
-
-#define EDP_INTR_STATUS1	\
-	(EDP_INTERRUPT_REG_1_HPD | EDP_INTERRUPT_REG_1_AUX_I2C_DONE | \
-	EDP_INTERRUPT_REG_1_WRONG_ADDR | EDP_INTERRUPT_REG_1_TIMEOUT | \
-	EDP_INTERRUPT_REG_1_NACK_DEFER | EDP_INTERRUPT_REG_1_WRONG_DATA_CNT | \
-	EDP_INTERRUPT_REG_1_I2C_NACK | EDP_INTERRUPT_REG_1_I2C_DEFER | \
-	EDP_INTERRUPT_REG_1_PLL_UNLOCK | EDP_INTERRUPT_REG_1_AUX_ERROR)
-#define EDP_INTR_MASK1	(EDP_INTR_STATUS1 << 2)
-#define EDP_INTR_STATUS2	\
-	(EDP_INTERRUPT_REG_2_READY_FOR_VIDEO | \
-	EDP_INTERRUPT_REG_2_IDLE_PATTERNs_SENT | \
-	EDP_INTERRUPT_REG_2_FRAME_END | EDP_INTERRUPT_REG_2_CRC_UPDATED)
-#define EDP_INTR_MASK2	(EDP_INTR_STATUS2 << 2)
-
-struct edp_ctrl {
-	struct platform_device *pdev;
-
-	void __iomem *base;
-
-	/* regulators */
-	struct regulator *vdda_vreg;	/* 1.8 V */
-	struct regulator *lvl_vreg;
-
-	/* clocks */
-	struct clk *aux_clk;
-	struct clk *pixel_clk;
-	struct clk *ahb_clk;
-	struct clk *link_clk;
-	struct clk *mdp_core_clk;
-
-	/* gpios */
-	struct gpio_desc *panel_en_gpio;
-	struct gpio_desc *panel_hpd_gpio;
-
-	/* completion and mutex */
-	struct completion idle_comp;
-	struct mutex dev_mutex; /* To protect device power status */
-
-	/* work queue */
-	struct work_struct on_work;
-	struct work_struct off_work;
-	struct workqueue_struct *workqueue;
-
-	/* Interrupt register lock */
-	spinlock_t irq_lock;
-
-	bool edp_connected;
-	bool power_on;
-
-	/* edid raw data */
-	struct edid *edid;
-
-	struct drm_dp_aux *drm_aux;
-
-	/* dpcd raw data */
-	u8 dpcd[DP_RECEIVER_CAP_SIZE];
-
-	/* Link status */
-	u8 link_rate;
-	u8 lane_cnt;
-	u8 v_level;
-	u8 p_level;
-
-	/* Timing status */
-	u8 interlaced;
-	u32 pixel_rate; /* in kHz */
-	u32 color_depth;
-
-	struct edp_aux *aux;
-	struct edp_phy *phy;
-};
-
-struct edp_pixel_clk_div {
-	u32 rate; /* in kHz */
-	u32 m;
-	u32 n;
-};
-
-#define EDP_PIXEL_CLK_NUM 8
-static const struct edp_pixel_clk_div clk_divs[2][EDP_PIXEL_CLK_NUM] = {
-	{ /* Link clock = 162MHz, source clock = 810MHz */
-		{119000, 31,  211}, /* WSXGA+ 1680x1050@60Hz CVT */
-		{130250, 32,  199}, /* UXGA 1600x1200@60Hz CVT */
-		{148500, 11,  60},  /* FHD 1920x1080@60Hz */
-		{154000, 50,  263}, /* WUXGA 1920x1200@60Hz CVT */
-		{209250, 31,  120}, /* QXGA 2048x1536@60Hz CVT */
-		{268500, 119, 359}, /* WQXGA 2560x1600@60Hz CVT */
-		{138530, 33,  193}, /* AUO B116HAN03.0 Panel */
-		{141400, 48,  275}, /* AUO B133HTN01.2 Panel */
-	},
-	{ /* Link clock = 270MHz, source clock = 675MHz */
-		{119000, 52,  295}, /* WSXGA+ 1680x1050@60Hz CVT */
-		{130250, 11,  57},  /* UXGA 1600x1200@60Hz CVT */
-		{148500, 11,  50},  /* FHD 1920x1080@60Hz */
-		{154000, 47,  206}, /* WUXGA 1920x1200@60Hz CVT */
-		{209250, 31,  100}, /* QXGA 2048x1536@60Hz CVT */
-		{268500, 107, 269}, /* WQXGA 2560x1600@60Hz CVT */
-		{138530, 63,  307}, /* AUO B116HAN03.0 Panel */
-		{141400, 53,  253}, /* AUO B133HTN01.2 Panel */
-	},
-};
-
-static int edp_clk_init(struct edp_ctrl *ctrl)
-{
-	struct platform_device *pdev = ctrl->pdev;
-	int ret;
-
-	ctrl->aux_clk = msm_clk_get(pdev, "core");
-	if (IS_ERR(ctrl->aux_clk)) {
-		ret = PTR_ERR(ctrl->aux_clk);
-		pr_err("%s: Can't find core clock, %d\n", __func__, ret);
-		ctrl->aux_clk = NULL;
-		return ret;
-	}
-
-	ctrl->pixel_clk = msm_clk_get(pdev, "pixel");
-	if (IS_ERR(ctrl->pixel_clk)) {
-		ret = PTR_ERR(ctrl->pixel_clk);
-		pr_err("%s: Can't find pixel clock, %d\n", __func__, ret);
-		ctrl->pixel_clk = NULL;
-		return ret;
-	}
-
-	ctrl->ahb_clk = msm_clk_get(pdev, "iface");
-	if (IS_ERR(ctrl->ahb_clk)) {
-		ret = PTR_ERR(ctrl->ahb_clk);
-		pr_err("%s: Can't find iface clock, %d\n", __func__, ret);
-		ctrl->ahb_clk = NULL;
-		return ret;
-	}
-
-	ctrl->link_clk = msm_clk_get(pdev, "link");
-	if (IS_ERR(ctrl->link_clk)) {
-		ret = PTR_ERR(ctrl->link_clk);
-		pr_err("%s: Can't find link clock, %d\n", __func__, ret);
-		ctrl->link_clk = NULL;
-		return ret;
-	}
-
-	/* need mdp core clock to receive irq */
-	ctrl->mdp_core_clk = msm_clk_get(pdev, "mdp_core");
-	if (IS_ERR(ctrl->mdp_core_clk)) {
-		ret = PTR_ERR(ctrl->mdp_core_clk);
-		pr_err("%s: Can't find mdp_core clock, %d\n", __func__, ret);
-		ctrl->mdp_core_clk = NULL;
-		return ret;
-	}
-
-	return 0;
-}
-
-static int edp_clk_enable(struct edp_ctrl *ctrl, u32 clk_mask)
-{
-	int ret;
-
-	DBG("mask=%x", clk_mask);
-	/* ahb_clk should be enabled first */
-	if (clk_mask & EDP_CLK_MASK_AHB) {
-		ret = clk_prepare_enable(ctrl->ahb_clk);
-		if (ret) {
-			pr_err("%s: Failed to enable ahb clk\n", __func__);
-			goto f0;
-		}
-	}
-	if (clk_mask & EDP_CLK_MASK_AUX) {
-		ret = clk_set_rate(ctrl->aux_clk, 19200000);
-		if (ret) {
-			pr_err("%s: Failed to set rate aux clk\n", __func__);
-			goto f1;
-		}
-		ret = clk_prepare_enable(ctrl->aux_clk);
-		if (ret) {
-			pr_err("%s: Failed to enable aux clk\n", __func__);
-			goto f1;
-		}
-	}
-	/* Need to set rate and enable link_clk prior to pixel_clk */
-	if (clk_mask & EDP_CLK_MASK_LINK) {
-		DBG("edp->link_clk, set_rate %ld",
-				(unsigned long)ctrl->link_rate * 27000000);
-		ret = clk_set_rate(ctrl->link_clk,
-				(unsigned long)ctrl->link_rate * 27000000);
-		if (ret) {
-			pr_err("%s: Failed to set rate to link clk\n",
-				__func__);
-			goto f2;
-		}
-
-		ret = clk_prepare_enable(ctrl->link_clk);
-		if (ret) {
-			pr_err("%s: Failed to enable link clk\n", __func__);
-			goto f2;
-		}
-	}
-	if (clk_mask & EDP_CLK_MASK_PIXEL) {
-		DBG("edp->pixel_clk, set_rate %ld",
-				(unsigned long)ctrl->pixel_rate * 1000);
-		ret = clk_set_rate(ctrl->pixel_clk,
-				(unsigned long)ctrl->pixel_rate * 1000);
-		if (ret) {
-			pr_err("%s: Failed to set rate to pixel clk\n",
-				__func__);
-			goto f3;
-		}
-
-		ret = clk_prepare_enable(ctrl->pixel_clk);
-		if (ret) {
-			pr_err("%s: Failed to enable pixel clk\n", __func__);
-			goto f3;
-		}
-	}
-	if (clk_mask & EDP_CLK_MASK_MDP_CORE) {
-		ret = clk_prepare_enable(ctrl->mdp_core_clk);
-		if (ret) {
-			pr_err("%s: Failed to enable mdp core clk\n", __func__);
-			goto f4;
-		}
-	}
-
-	return 0;
-
-f4:
-	if (clk_mask & EDP_CLK_MASK_PIXEL)
-		clk_disable_unprepare(ctrl->pixel_clk);
-f3:
-	if (clk_mask & EDP_CLK_MASK_LINK)
-		clk_disable_unprepare(ctrl->link_clk);
-f2:
-	if (clk_mask & EDP_CLK_MASK_AUX)
-		clk_disable_unprepare(ctrl->aux_clk);
-f1:
-	if (clk_mask & EDP_CLK_MASK_AHB)
-		clk_disable_unprepare(ctrl->ahb_clk);
-f0:
-	return ret;
-}
-
-static void edp_clk_disable(struct edp_ctrl *ctrl, u32 clk_mask)
-{
-	if (clk_mask & EDP_CLK_MASK_MDP_CORE)
-		clk_disable_unprepare(ctrl->mdp_core_clk);
-	if (clk_mask & EDP_CLK_MASK_PIXEL)
-		clk_disable_unprepare(ctrl->pixel_clk);
-	if (clk_mask & EDP_CLK_MASK_LINK)
-		clk_disable_unprepare(ctrl->link_clk);
-	if (clk_mask & EDP_CLK_MASK_AUX)
-		clk_disable_unprepare(ctrl->aux_clk);
-	if (clk_mask & EDP_CLK_MASK_AHB)
-		clk_disable_unprepare(ctrl->ahb_clk);
-}
-
-static int edp_regulator_init(struct edp_ctrl *ctrl)
-{
-	struct device *dev = &ctrl->pdev->dev;
-	int ret;
-
-	DBG("");
-	ctrl->vdda_vreg = devm_regulator_get(dev, "vdda");
-	ret = PTR_ERR_OR_ZERO(ctrl->vdda_vreg);
-	if (ret) {
-		pr_err("%s: Could not get vdda reg, ret = %d\n", __func__,
-				ret);
-		ctrl->vdda_vreg = NULL;
-		return ret;
-	}
-	ctrl->lvl_vreg = devm_regulator_get(dev, "lvl-vdd");
-	ret = PTR_ERR_OR_ZERO(ctrl->lvl_vreg);
-	if (ret) {
-		pr_err("%s: Could not get lvl-vdd reg, ret = %d\n", __func__,
-				ret);
-		ctrl->lvl_vreg = NULL;
-		return ret;
-	}
-
-	return 0;
-}
-
-static int edp_regulator_enable(struct edp_ctrl *ctrl)
-{
-	int ret;
-
-	ret = regulator_set_load(ctrl->vdda_vreg, VDDA_UA_ON_LOAD);
-	if (ret < 0) {
-		pr_err("%s: vdda_vreg set regulator mode failed.\n", __func__);
-		goto vdda_set_fail;
-	}
-
-	ret = regulator_enable(ctrl->vdda_vreg);
-	if (ret) {
-		pr_err("%s: Failed to enable vdda_vreg regulator.\n", __func__);
-		goto vdda_enable_fail;
-	}
-
-	ret = regulator_enable(ctrl->lvl_vreg);
-	if (ret) {
-		pr_err("Failed to enable lvl-vdd reg regulator, %d", ret);
-		goto lvl_enable_fail;
-	}
-
-	DBG("exit");
-	return 0;
-
-lvl_enable_fail:
-	regulator_disable(ctrl->vdda_vreg);
-vdda_enable_fail:
-	regulator_set_load(ctrl->vdda_vreg, VDDA_UA_OFF_LOAD);
-vdda_set_fail:
-	return ret;
-}
-
-static void edp_regulator_disable(struct edp_ctrl *ctrl)
-{
-	regulator_disable(ctrl->lvl_vreg);
-	regulator_disable(ctrl->vdda_vreg);
-	regulator_set_load(ctrl->vdda_vreg, VDDA_UA_OFF_LOAD);
-}
-
-static int edp_gpio_config(struct edp_ctrl *ctrl)
-{
-	struct device *dev = &ctrl->pdev->dev;
-	int ret;
-
-	ctrl->panel_hpd_gpio = devm_gpiod_get(dev, "panel-hpd", GPIOD_IN);
-	if (IS_ERR(ctrl->panel_hpd_gpio)) {
-		ret = PTR_ERR(ctrl->panel_hpd_gpio);
-		ctrl->panel_hpd_gpio = NULL;
-		pr_err("%s: cannot get panel-hpd-gpios, %d\n", __func__, ret);
-		return ret;
-	}
-
-	ctrl->panel_en_gpio = devm_gpiod_get(dev, "panel-en", GPIOD_OUT_LOW);
-	if (IS_ERR(ctrl->panel_en_gpio)) {
-		ret = PTR_ERR(ctrl->panel_en_gpio);
-		ctrl->panel_en_gpio = NULL;
-		pr_err("%s: cannot get panel-en-gpios, %d\n", __func__, ret);
-		return ret;
-	}
-
-	DBG("gpio on");
-
-	return 0;
-}
-
-static void edp_ctrl_irq_enable(struct edp_ctrl *ctrl, int enable)
-{
-	unsigned long flags;
-
-	DBG("%d", enable);
-	spin_lock_irqsave(&ctrl->irq_lock, flags);
-	if (enable) {
-		edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_1, EDP_INTR_MASK1);
-		edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_2, EDP_INTR_MASK2);
-	} else {
-		edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_1, 0x0);
-		edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_2, 0x0);
-	}
-	spin_unlock_irqrestore(&ctrl->irq_lock, flags);
-	DBG("exit");
-}
-
-static void edp_fill_link_cfg(struct edp_ctrl *ctrl)
-{
-	u32 prate;
-	u32 lrate;
-	u32 bpp;
-	u8 max_lane = drm_dp_max_lane_count(ctrl->dpcd);
-	u8 lane;
-
-	prate = ctrl->pixel_rate;
-	bpp = ctrl->color_depth * 3;
-
-	/*
-	 * By default, use the maximum link rate and minimum lane count,
-	 * so that we can do rate down shift during link training.
-	 */
-	ctrl->link_rate = ctrl->dpcd[DP_MAX_LINK_RATE];
-
-	prate *= bpp;
-	prate /= 8; /* in kByte */
-
-	lrate = 270000; /* in kHz */
-	lrate *= ctrl->link_rate;
-	lrate /= 10; /* in kByte, 10 bits --> 8 bits */
-
-	for (lane = 1; lane <= max_lane; lane <<= 1) {
-		if (lrate >= prate)
-			break;
-		lrate <<= 1;
-	}
-
-	ctrl->lane_cnt = lane;
-	DBG("rate=%d lane=%d", ctrl->link_rate, ctrl->lane_cnt);
-}
-
-static void edp_config_ctrl(struct edp_ctrl *ctrl)
-{
-	u32 data;
-	enum edp_color_depth depth;
-
-	data = EDP_CONFIGURATION_CTRL_LANES(ctrl->lane_cnt - 1);
-
-	if (drm_dp_enhanced_frame_cap(ctrl->dpcd))
-		data |= EDP_CONFIGURATION_CTRL_ENHANCED_FRAMING;
-
-	depth = EDP_6BIT;
-	if (ctrl->color_depth == 8)
-		depth = EDP_8BIT;
-
-	data |= EDP_CONFIGURATION_CTRL_COLOR(depth);
-
-	if (!ctrl->interlaced)	/* progressive */
-		data |= EDP_CONFIGURATION_CTRL_PROGRESSIVE;
-
-	data |= (EDP_CONFIGURATION_CTRL_SYNC_CLK |
-		EDP_CONFIGURATION_CTRL_STATIC_MVID);
-
-	edp_write(ctrl->base + REG_EDP_CONFIGURATION_CTRL, data);
-}
-
-static void edp_state_ctrl(struct edp_ctrl *ctrl, u32 state)
-{
-	edp_write(ctrl->base + REG_EDP_STATE_CTRL, state);
-	/* Make sure H/W status is set */
-	wmb();
-}
-
-static int edp_lane_set_write(struct edp_ctrl *ctrl,
-	u8 voltage_level, u8 pre_emphasis_level)
-{
-	int i;
-	u8 buf[4];
-
-	if (voltage_level >= DPCD_LINK_VOLTAGE_MAX)
-		voltage_level |= 0x04;
-
-	if (pre_emphasis_level >= DPCD_LINK_PRE_EMPHASIS_MAX)
-		pre_emphasis_level |= 0x04;
-
-	pre_emphasis_level <<= 3;
-
-	for (i = 0; i < 4; i++)
-		buf[i] = voltage_level | pre_emphasis_level;
-
-	DBG("%s: p|v=0x%x", __func__, voltage_level | pre_emphasis_level);
-	if (drm_dp_dpcd_write(ctrl->drm_aux, 0x103, buf, 4) < 4) {
-		pr_err("%s: Set sw/pe to panel failed\n", __func__);
-		return -ENOLINK;
-	}
-
-	return 0;
-}
-
-static int edp_train_pattern_set_write(struct edp_ctrl *ctrl, u8 pattern)
-{
-	u8 p = pattern;
-
-	DBG("pattern=%x", p);
-	if (drm_dp_dpcd_write(ctrl->drm_aux,
-				DP_TRAINING_PATTERN_SET, &p, 1) < 1) {
-		pr_err("%s: Set training pattern to panel failed\n", __func__);
-		return -ENOLINK;
-	}
-
-	return 0;
-}
-
-static void edp_sink_train_set_adjust(struct edp_ctrl *ctrl,
-	const u8 *link_status)
-{
-	int i;
-	u8 max = 0;
-	u8 data;
-
-	/* use the max level across lanes */
-	for (i = 0; i < ctrl->lane_cnt; i++) {
-		data = drm_dp_get_adjust_request_voltage(link_status, i);
-		DBG("lane=%d req_voltage_swing=0x%x", i, data);
-		if (max < data)
-			max = data;
-	}
-
-	ctrl->v_level = max >> DP_TRAIN_VOLTAGE_SWING_SHIFT;
-
-	/* use the max level across lanes */
-	max = 0;
-	for (i = 0; i < ctrl->lane_cnt; i++) {
-		data = drm_dp_get_adjust_request_pre_emphasis(link_status, i);
-		DBG("lane=%d req_pre_emphasis=0x%x", i, data);
-		if (max < data)
-			max = data;
-	}
-
-	ctrl->p_level = max >> DP_TRAIN_PRE_EMPHASIS_SHIFT;
-	DBG("v_level=%d, p_level=%d", ctrl->v_level, ctrl->p_level);
-}
-
-static void edp_host_train_set(struct edp_ctrl *ctrl, u32 train)
-{
-	int cnt = 10;
-	u32 data;
-	u32 shift = train - 1;
-
-	DBG("train=%d", train);
-
-	edp_state_ctrl(ctrl, EDP_STATE_CTRL_TRAIN_PATTERN_1 << shift);
-	while (--cnt) {
-		data = edp_read(ctrl->base + REG_EDP_MAINLINK_READY);
-		if (data & (EDP_MAINLINK_READY_TRAIN_PATTERN_1_READY << shift))
-			break;
-	}
-
-	if (cnt == 0)
-		pr_err("%s: set link_train=%d failed\n", __func__, train);
-}
-
-static const u8 vm_pre_emphasis[4][4] = {
-	{0x03, 0x06, 0x09, 0x0C},	/* pe0, 0 db */
-	{0x03, 0x06, 0x09, 0xFF},	/* pe1, 3.5 db */
-	{0x03, 0x06, 0xFF, 0xFF},	/* pe2, 6.0 db */
-	{0x03, 0xFF, 0xFF, 0xFF}	/* pe3, 9.5 db */
-};
-
-/* voltage swing, 0.2v and 1.0v are not support */
-static const u8 vm_voltage_swing[4][4] = {
-	{0x14, 0x18, 0x1A, 0x1E}, /* sw0, 0.4v  */
-	{0x18, 0x1A, 0x1E, 0xFF}, /* sw1, 0.6 v */
-	{0x1A, 0x1E, 0xFF, 0xFF}, /* sw1, 0.8 v */
-	{0x1E, 0xFF, 0xFF, 0xFF}  /* sw1, 1.2 v, optional */
-};
-
-static int edp_voltage_pre_emphasise_set(struct edp_ctrl *ctrl)
-{
-	u32 value0;
-	u32 value1;
-
-	DBG("v=%d p=%d", ctrl->v_level, ctrl->p_level);
-
-	value0 = vm_pre_emphasis[(int)(ctrl->v_level)][(int)(ctrl->p_level)];
-	value1 = vm_voltage_swing[(int)(ctrl->v_level)][(int)(ctrl->p_level)];
-
-	/* Configure host and panel only if both values are allowed */
-	if (value0 != 0xFF && value1 != 0xFF) {
-		msm_edp_phy_vm_pe_cfg(ctrl->phy, value0, value1);
-		return edp_lane_set_write(ctrl, ctrl->v_level, ctrl->p_level);
-	}
-
-	return -EINVAL;
-}
-
-static int edp_start_link_train_1(struct edp_ctrl *ctrl)
-{
-	u8 link_status[DP_LINK_STATUS_SIZE];
-	u8 old_v_level;
-	int tries;
-	int ret;
-	int rlen;
-
-	DBG("");
-
-	edp_host_train_set(ctrl, DP_TRAINING_PATTERN_1);
-	ret = edp_voltage_pre_emphasise_set(ctrl);
-	if (ret)
-		return ret;
-	ret = edp_train_pattern_set_write(ctrl,
-			DP_TRAINING_PATTERN_1 | DP_RECOVERED_CLOCK_OUT_EN);
-	if (ret)
-		return ret;
-
-	tries = 0;
-	old_v_level = ctrl->v_level;
-	while (1) {
-		drm_dp_link_train_clock_recovery_delay(ctrl->drm_aux, ctrl->dpcd);
-
-		rlen = drm_dp_dpcd_read_link_status(ctrl->drm_aux, link_status);
-		if (rlen < DP_LINK_STATUS_SIZE) {
-			pr_err("%s: read link status failed\n", __func__);
-			return -ENOLINK;
-		}
-		if (drm_dp_clock_recovery_ok(link_status, ctrl->lane_cnt)) {
-			ret = 0;
-			break;
-		}
-
-		if (ctrl->v_level == DPCD_LINK_VOLTAGE_MAX) {
-			ret = -1;
-			break;
-		}
-
-		if (old_v_level == ctrl->v_level) {
-			tries++;
-			if (tries >= 5) {
-				ret = -1;
-				break;
-			}
-		} else {
-			tries = 0;
-			old_v_level = ctrl->v_level;
-		}
-
-		edp_sink_train_set_adjust(ctrl, link_status);
-		ret = edp_voltage_pre_emphasise_set(ctrl);
-		if (ret)
-			return ret;
-	}
-
-	return ret;
-}
-
-static int edp_start_link_train_2(struct edp_ctrl *ctrl)
-{
-	u8 link_status[DP_LINK_STATUS_SIZE];
-	int tries = 0;
-	int ret;
-	int rlen;
-
-	DBG("");
-
-	edp_host_train_set(ctrl, DP_TRAINING_PATTERN_2);
-	ret = edp_voltage_pre_emphasise_set(ctrl);
-	if (ret)
-		return ret;
-
-	ret = edp_train_pattern_set_write(ctrl,
-			DP_TRAINING_PATTERN_2 | DP_RECOVERED_CLOCK_OUT_EN);
-	if (ret)
-		return ret;
-
-	while (1) {
-		drm_dp_link_train_channel_eq_delay(ctrl->drm_aux, ctrl->dpcd);
-
-		rlen = drm_dp_dpcd_read_link_status(ctrl->drm_aux, link_status);
-		if (rlen < DP_LINK_STATUS_SIZE) {
-			pr_err("%s: read link status failed\n", __func__);
-			return -ENOLINK;
-		}
-		if (drm_dp_channel_eq_ok(link_status, ctrl->lane_cnt)) {
-			ret = 0;
-			break;
-		}
-
-		tries++;
-		if (tries > 10) {
-			ret = -1;
-			break;
-		}
-
-		edp_sink_train_set_adjust(ctrl, link_status);
-		ret = edp_voltage_pre_emphasise_set(ctrl);
-		if (ret)
-			return ret;
-	}
-
-	return ret;
-}
-
-static int edp_link_rate_down_shift(struct edp_ctrl *ctrl)
-{
-	u32 prate, lrate, bpp;
-	u8 rate, lane, max_lane;
-	int changed = 0;
-
-	rate = ctrl->link_rate;
-	lane = ctrl->lane_cnt;
-	max_lane = drm_dp_max_lane_count(ctrl->dpcd);
-
-	bpp = ctrl->color_depth * 3;
-	prate = ctrl->pixel_rate;
-	prate *= bpp;
-	prate /= 8; /* in kByte */
-
-	if (rate > DP_LINK_BW_1_62 && rate <= EDP_LINK_BW_MAX) {
-		rate -= 4;	/* reduce rate */
-		changed++;
-	}
-
-	if (changed) {
-		if (lane >= 1 && lane < max_lane)
-			lane <<= 1;	/* increase lane */
-
-		lrate = 270000; /* in kHz */
-		lrate *= rate;
-		lrate /= 10; /* kByte, 10 bits --> 8 bits */
-		lrate *= lane;
-
-		DBG("new lrate=%u prate=%u(kHz) rate=%d lane=%d p=%u b=%d",
-			lrate, prate, rate, lane,
-			ctrl->pixel_rate,
-			bpp);
-
-		if (lrate > prate) {
-			ctrl->link_rate = rate;
-			ctrl->lane_cnt = lane;
-			DBG("new rate=%d %d", rate, lane);
-			return 0;
-		}
-	}
-
-	return -EINVAL;
-}
-
-static int edp_clear_training_pattern(struct edp_ctrl *ctrl)
-{
-	int ret;
-
-	ret = edp_train_pattern_set_write(ctrl, 0);
-
-	drm_dp_link_train_channel_eq_delay(ctrl->drm_aux, ctrl->dpcd);
-
-	return ret;
-}
-
-static int edp_do_link_train(struct edp_ctrl *ctrl)
-{
-	u8 values[2];
-	int ret;
-
-	DBG("");
-	/*
-	 * Set the current link rate and lane cnt to panel. They may have been
-	 * adjusted and the values are different from them in DPCD CAP
-	 */
-	values[0] = ctrl->lane_cnt;
-	values[1] = ctrl->link_rate;
-
-	if (drm_dp_enhanced_frame_cap(ctrl->dpcd))
-		values[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
-
-	if (drm_dp_dpcd_write(ctrl->drm_aux, DP_LINK_BW_SET, values,
-			      sizeof(values)) < 0)
-		return EDP_TRAIN_FAIL;
-
-	ctrl->v_level = 0; /* start from default level */
-	ctrl->p_level = 0;
-
-	edp_state_ctrl(ctrl, 0);
-	if (edp_clear_training_pattern(ctrl))
-		return EDP_TRAIN_FAIL;
-
-	ret = edp_start_link_train_1(ctrl);
-	if (ret < 0) {
-		if (edp_link_rate_down_shift(ctrl) == 0) {
-			DBG("link reconfig");
-			ret = EDP_TRAIN_RECONFIG;
-			goto clear;
-		} else {
-			pr_err("%s: Training 1 failed", __func__);
-			ret = EDP_TRAIN_FAIL;
-			goto clear;
-		}
-	}
-	DBG("Training 1 completed successfully");
-
-	edp_state_ctrl(ctrl, 0);
-	if (edp_clear_training_pattern(ctrl))
-		return EDP_TRAIN_FAIL;
-
-	ret = edp_start_link_train_2(ctrl);
-	if (ret < 0) {
-		if (edp_link_rate_down_shift(ctrl) == 0) {
-			DBG("link reconfig");
-			ret = EDP_TRAIN_RECONFIG;
-			goto clear;
-		} else {
-			pr_err("%s: Training 2 failed", __func__);
-			ret = EDP_TRAIN_FAIL;
-			goto clear;
-		}
-	}
-	DBG("Training 2 completed successfully");
-
-	edp_state_ctrl(ctrl, EDP_STATE_CTRL_SEND_VIDEO);
-clear:
-	edp_clear_training_pattern(ctrl);
-
-	return ret;
-}
-
-static void edp_clock_synchrous(struct edp_ctrl *ctrl, int sync)
-{
-	u32 data;
-	enum edp_color_depth depth;
-
-	data = edp_read(ctrl->base + REG_EDP_MISC1_MISC0);
-
-	if (sync)
-		data |= EDP_MISC1_MISC0_SYNC;
-	else
-		data &= ~EDP_MISC1_MISC0_SYNC;
-
-	/* only legacy rgb mode supported */
-	depth = EDP_6BIT; /* Default */
-	if (ctrl->color_depth == 8)
-		depth = EDP_8BIT;
-	else if (ctrl->color_depth == 10)
-		depth = EDP_10BIT;
-	else if (ctrl->color_depth == 12)
-		depth = EDP_12BIT;
-	else if (ctrl->color_depth == 16)
-		depth = EDP_16BIT;
-
-	data |= EDP_MISC1_MISC0_COLOR(depth);
-
-	edp_write(ctrl->base + REG_EDP_MISC1_MISC0, data);
-}
-
-static int edp_sw_mvid_nvid(struct edp_ctrl *ctrl, u32 m, u32 n)
-{
-	u32 n_multi, m_multi = 5;
-
-	if (ctrl->link_rate == DP_LINK_BW_1_62) {
-		n_multi = 1;
-	} else if (ctrl->link_rate == DP_LINK_BW_2_7) {
-		n_multi = 2;
-	} else {
-		pr_err("%s: Invalid link rate, %d\n", __func__,
-			ctrl->link_rate);
-		return -EINVAL;
-	}
-
-	edp_write(ctrl->base + REG_EDP_SOFTWARE_MVID, m * m_multi);
-	edp_write(ctrl->base + REG_EDP_SOFTWARE_NVID, n * n_multi);
-
-	return 0;
-}
-
-static void edp_mainlink_ctrl(struct edp_ctrl *ctrl, int enable)
-{
-	u32 data = 0;
-
-	edp_write(ctrl->base + REG_EDP_MAINLINK_CTRL, EDP_MAINLINK_CTRL_RESET);
-	/* Make sure fully reset */
-	wmb();
-	usleep_range(500, 1000);
-
-	if (enable)
-		data |= EDP_MAINLINK_CTRL_ENABLE;
-
-	edp_write(ctrl->base + REG_EDP_MAINLINK_CTRL, data);
-}
-
-static void edp_ctrl_phy_aux_enable(struct edp_ctrl *ctrl, int enable)
-{
-	if (enable) {
-		edp_regulator_enable(ctrl);
-		edp_clk_enable(ctrl, EDP_CLK_MASK_AUX_CHAN);
-		msm_edp_phy_ctrl(ctrl->phy, 1);
-		msm_edp_aux_ctrl(ctrl->aux, 1);
-		gpiod_set_value(ctrl->panel_en_gpio, 1);
-	} else {
-		gpiod_set_value(ctrl->panel_en_gpio, 0);
-		msm_edp_aux_ctrl(ctrl->aux, 0);
-		msm_edp_phy_ctrl(ctrl->phy, 0);
-		edp_clk_disable(ctrl, EDP_CLK_MASK_AUX_CHAN);
-		edp_regulator_disable(ctrl);
-	}
-}
-
-static void edp_ctrl_link_enable(struct edp_ctrl *ctrl, int enable)
-{
-	u32 m, n;
-
-	if (enable) {
-		/* Enable link channel clocks */
-		edp_clk_enable(ctrl, EDP_CLK_MASK_LINK_CHAN);
-
-		msm_edp_phy_lane_power_ctrl(ctrl->phy, true, ctrl->lane_cnt);
-
-		msm_edp_phy_vm_pe_init(ctrl->phy);
-
-		/* Make sure phy is programed */
-		wmb();
-		msm_edp_phy_ready(ctrl->phy);
-
-		edp_config_ctrl(ctrl);
-		msm_edp_ctrl_pixel_clock_valid(ctrl, ctrl->pixel_rate, &m, &n);
-		edp_sw_mvid_nvid(ctrl, m, n);
-		edp_mainlink_ctrl(ctrl, 1);
-	} else {
-		edp_mainlink_ctrl(ctrl, 0);
-
-		msm_edp_phy_lane_power_ctrl(ctrl->phy, false, 0);
-		edp_clk_disable(ctrl, EDP_CLK_MASK_LINK_CHAN);
-	}
-}
-
-static int edp_ctrl_training(struct edp_ctrl *ctrl)
-{
-	int ret;
-
-	/* Do link training only when power is on */
-	if (!ctrl->power_on)
-		return -EINVAL;
-
-train_start:
-	ret = edp_do_link_train(ctrl);
-	if (ret == EDP_TRAIN_RECONFIG) {
-		/* Re-configure main link */
-		edp_ctrl_irq_enable(ctrl, 0);
-		edp_ctrl_link_enable(ctrl, 0);
-		msm_edp_phy_ctrl(ctrl->phy, 0);
-
-		/* Make sure link is fully disabled */
-		wmb();
-		usleep_range(500, 1000);
-
-		msm_edp_phy_ctrl(ctrl->phy, 1);
-		edp_ctrl_link_enable(ctrl, 1);
-		edp_ctrl_irq_enable(ctrl, 1);
-		goto train_start;
-	}
-
-	return ret;
-}
-
-static void edp_ctrl_on_worker(struct work_struct *work)
-{
-	struct edp_ctrl *ctrl = container_of(
-				work, struct edp_ctrl, on_work);
-	u8 value;
-	int ret;
-
-	mutex_lock(&ctrl->dev_mutex);
-
-	if (ctrl->power_on) {
-		DBG("already on");
-		goto unlock_ret;
-	}
-
-	edp_ctrl_phy_aux_enable(ctrl, 1);
-	edp_ctrl_link_enable(ctrl, 1);
-
-	edp_ctrl_irq_enable(ctrl, 1);
-
-	/* DP_SET_POWER register is only available on DPCD v1.1 and later */
-	if (ctrl->dpcd[DP_DPCD_REV] >= 0x11) {
-		ret = drm_dp_dpcd_readb(ctrl->drm_aux, DP_SET_POWER, &value);
-		if (ret < 0)
-			goto fail;
-
-		value &= ~DP_SET_POWER_MASK;
-		value |= DP_SET_POWER_D0;
-
-		ret = drm_dp_dpcd_writeb(ctrl->drm_aux, DP_SET_POWER, value);
-		if (ret < 0)
-			goto fail;
-
-		/*
-		 * According to the DP 1.1 specification, a "Sink Device must
-		 * exit the power saving state within 1 ms" (Section 2.5.3.1,
-		 * Table 5-52, "Sink Control Field" (register 0x600).
-		 */
-		usleep_range(1000, 2000);
-	}
-
-	ctrl->power_on = true;
-
-	/* Start link training */
-	ret = edp_ctrl_training(ctrl);
-	if (ret != EDP_TRAIN_SUCCESS)
-		goto fail;
-
-	DBG("DONE");
-	goto unlock_ret;
-
-fail:
-	edp_ctrl_irq_enable(ctrl, 0);
-	edp_ctrl_link_enable(ctrl, 0);
-	edp_ctrl_phy_aux_enable(ctrl, 0);
-	ctrl->power_on = false;
-unlock_ret:
-	mutex_unlock(&ctrl->dev_mutex);
-}
-
-static void edp_ctrl_off_worker(struct work_struct *work)
-{
-	struct edp_ctrl *ctrl = container_of(
-				work, struct edp_ctrl, off_work);
-	unsigned long time_left;
-
-	mutex_lock(&ctrl->dev_mutex);
-
-	if (!ctrl->power_on) {
-		DBG("already off");
-		goto unlock_ret;
-	}
-
-	reinit_completion(&ctrl->idle_comp);
-	edp_state_ctrl(ctrl, EDP_STATE_CTRL_PUSH_IDLE);
-
-	time_left = wait_for_completion_timeout(&ctrl->idle_comp,
-						msecs_to_jiffies(500));
-	if (!time_left)
-		DBG("%s: idle pattern timedout\n", __func__);
-
-	edp_state_ctrl(ctrl, 0);
-
-	/* DP_SET_POWER register is only available on DPCD v1.1 and later */
-	if (ctrl->dpcd[DP_DPCD_REV] >= 0x11) {
-		u8 value;
-		int ret;
-
-		ret = drm_dp_dpcd_readb(ctrl->drm_aux, DP_SET_POWER, &value);
-		if (ret > 0) {
-			value &= ~DP_SET_POWER_MASK;
-			value |= DP_SET_POWER_D3;
-
-			drm_dp_dpcd_writeb(ctrl->drm_aux, DP_SET_POWER, value);
-		}
-	}
-
-	edp_ctrl_irq_enable(ctrl, 0);
-
-	edp_ctrl_link_enable(ctrl, 0);
-
-	edp_ctrl_phy_aux_enable(ctrl, 0);
-
-	ctrl->power_on = false;
-
-unlock_ret:
-	mutex_unlock(&ctrl->dev_mutex);
-}
-
-irqreturn_t msm_edp_ctrl_irq(struct edp_ctrl *ctrl)
-{
-	u32 isr1, isr2, mask1, mask2;
-	u32 ack;
-
-	DBG("");
-	spin_lock(&ctrl->irq_lock);
-	isr1 = edp_read(ctrl->base + REG_EDP_INTERRUPT_REG_1);
-	isr2 = edp_read(ctrl->base + REG_EDP_INTERRUPT_REG_2);
-
-	mask1 = isr1 & EDP_INTR_MASK1;
-	mask2 = isr2 & EDP_INTR_MASK2;
-
-	isr1 &= ~mask1;	/* remove masks bit */
-	isr2 &= ~mask2;
-
-	DBG("isr=%x mask=%x isr2=%x mask2=%x",
-			isr1, mask1, isr2, mask2);
-
-	ack = isr1 & EDP_INTR_STATUS1;
-	ack <<= 1;	/* ack bits */
-	ack |= mask1;
-	edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_1, ack);
-
-	ack = isr2 & EDP_INTR_STATUS2;
-	ack <<= 1;	/* ack bits */
-	ack |= mask2;
-	edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_2, ack);
-	spin_unlock(&ctrl->irq_lock);
-
-	if (isr1 & EDP_INTERRUPT_REG_1_HPD)
-		DBG("edp_hpd");
-
-	if (isr2 & EDP_INTERRUPT_REG_2_READY_FOR_VIDEO)
-		DBG("edp_video_ready");
-
-	if (isr2 & EDP_INTERRUPT_REG_2_IDLE_PATTERNs_SENT) {
-		DBG("idle_patterns_sent");
-		complete(&ctrl->idle_comp);
-	}
-
-	msm_edp_aux_irq(ctrl->aux, isr1);
-
-	return IRQ_HANDLED;
-}
-
-void msm_edp_ctrl_power(struct edp_ctrl *ctrl, bool on)
-{
-	if (on)
-		queue_work(ctrl->workqueue, &ctrl->on_work);
-	else
-		queue_work(ctrl->workqueue, &ctrl->off_work);
-}
-
-int msm_edp_ctrl_init(struct msm_edp *edp)
-{
-	struct edp_ctrl *ctrl = NULL;
-	struct device *dev;
-	int ret;
-
-	if (!edp) {
-		pr_err("%s: edp is NULL!\n", __func__);
-		return -EINVAL;
-	}
-
-	dev = &edp->pdev->dev;
-	ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
-	if (!ctrl)
-		return -ENOMEM;
-
-	edp->ctrl = ctrl;
-	ctrl->pdev = edp->pdev;
-
-	ctrl->base = msm_ioremap(ctrl->pdev, "edp", "eDP");
-	if (IS_ERR(ctrl->base))
-		return PTR_ERR(ctrl->base);
-
-	/* Get regulator, clock, gpio, pwm */
-	ret = edp_regulator_init(ctrl);
-	if (ret) {
-		pr_err("%s:regulator init fail\n", __func__);
-		return ret;
-	}
-	ret = edp_clk_init(ctrl);
-	if (ret) {
-		pr_err("%s:clk init fail\n", __func__);
-		return ret;
-	}
-	ret = edp_gpio_config(ctrl);
-	if (ret) {
-		pr_err("%s:failed to configure GPIOs: %d", __func__, ret);
-		return ret;
-	}
-
-	/* Init aux and phy */
-	ctrl->aux = msm_edp_aux_init(edp, ctrl->base, &ctrl->drm_aux);
-	if (!ctrl->aux || !ctrl->drm_aux) {
-		pr_err("%s:failed to init aux\n", __func__);
-		return -ENOMEM;
-	}
-
-	ctrl->phy = msm_edp_phy_init(dev, ctrl->base);
-	if (!ctrl->phy) {
-		pr_err("%s:failed to init phy\n", __func__);
-		ret = -ENOMEM;
-		goto err_destory_aux;
-	}
-
-	spin_lock_init(&ctrl->irq_lock);
-	mutex_init(&ctrl->dev_mutex);
-	init_completion(&ctrl->idle_comp);
-
-	/* setup workqueue */
-	ctrl->workqueue = alloc_ordered_workqueue("edp_drm_work", 0);
-	INIT_WORK(&ctrl->on_work, edp_ctrl_on_worker);
-	INIT_WORK(&ctrl->off_work, edp_ctrl_off_worker);
-
-	return 0;
-
-err_destory_aux:
-	msm_edp_aux_destroy(dev, ctrl->aux);
-	ctrl->aux = NULL;
-	return ret;
-}
-
-void msm_edp_ctrl_destroy(struct edp_ctrl *ctrl)
-{
-	if (!ctrl)
-		return;
-
-	if (ctrl->workqueue) {
-		destroy_workqueue(ctrl->workqueue);
-		ctrl->workqueue = NULL;
-	}
-
-	if (ctrl->aux) {
-		msm_edp_aux_destroy(&ctrl->pdev->dev, ctrl->aux);
-		ctrl->aux = NULL;
-	}
-
-	kfree(ctrl->edid);
-	ctrl->edid = NULL;
-
-	mutex_destroy(&ctrl->dev_mutex);
-}
-
-bool msm_edp_ctrl_panel_connected(struct edp_ctrl *ctrl)
-{
-	mutex_lock(&ctrl->dev_mutex);
-	DBG("connect status = %d", ctrl->edp_connected);
-	if (ctrl->edp_connected) {
-		mutex_unlock(&ctrl->dev_mutex);
-		return true;
-	}
-
-	if (!ctrl->power_on) {
-		edp_ctrl_phy_aux_enable(ctrl, 1);
-		edp_ctrl_irq_enable(ctrl, 1);
-	}
-
-	if (drm_dp_dpcd_read(ctrl->drm_aux, DP_DPCD_REV, ctrl->dpcd,
-				DP_RECEIVER_CAP_SIZE) < DP_RECEIVER_CAP_SIZE) {
-		pr_err("%s: AUX channel is NOT ready\n", __func__);
-		memset(ctrl->dpcd, 0, DP_RECEIVER_CAP_SIZE);
-	} else {
-		ctrl->edp_connected = true;
-	}
-
-	if (!ctrl->power_on) {
-		edp_ctrl_irq_enable(ctrl, 0);
-		edp_ctrl_phy_aux_enable(ctrl, 0);
-	}
-
-	DBG("exit: connect status=%d", ctrl->edp_connected);
-
-	mutex_unlock(&ctrl->dev_mutex);
-
-	return ctrl->edp_connected;
-}
-
-int msm_edp_ctrl_get_panel_info(struct edp_ctrl *ctrl,
-		struct drm_connector *connector, struct edid **edid)
-{
-	mutex_lock(&ctrl->dev_mutex);
-
-	if (ctrl->edid) {
-		if (edid) {
-			DBG("Just return edid buffer");
-			*edid = ctrl->edid;
-		}
-		goto unlock_ret;
-	}
-
-	if (!ctrl->power_on) {
-		edp_ctrl_phy_aux_enable(ctrl, 1);
-		edp_ctrl_irq_enable(ctrl, 1);
-	}
-
-	/* Initialize link rate as panel max link rate */
-	ctrl->link_rate = ctrl->dpcd[DP_MAX_LINK_RATE];
-
-	ctrl->edid = drm_get_edid(connector, &ctrl->drm_aux->ddc);
-	if (!ctrl->edid) {
-		pr_err("%s: edid read fail\n", __func__);
-		goto disable_ret;
-	}
-
-	if (edid)
-		*edid = ctrl->edid;
-
-disable_ret:
-	if (!ctrl->power_on) {
-		edp_ctrl_irq_enable(ctrl, 0);
-		edp_ctrl_phy_aux_enable(ctrl, 0);
-	}
-unlock_ret:
-	mutex_unlock(&ctrl->dev_mutex);
-	return 0;
-}
-
-int msm_edp_ctrl_timing_cfg(struct edp_ctrl *ctrl,
-				const struct drm_display_mode *mode,
-				const struct drm_display_info *info)
-{
-	u32 hstart_from_sync, vstart_from_sync;
-	u32 data;
-	int ret = 0;
-
-	mutex_lock(&ctrl->dev_mutex);
-	/*
-	 * Need to keep color depth, pixel rate and
-	 * interlaced information in ctrl context
-	 */
-	ctrl->color_depth = info->bpc;
-	ctrl->pixel_rate = mode->clock;
-	ctrl->interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
-
-	/* Fill initial link config based on passed in timing */
-	edp_fill_link_cfg(ctrl);
-
-	if (edp_clk_enable(ctrl, EDP_CLK_MASK_AHB)) {
-		pr_err("%s, fail to prepare enable ahb clk\n", __func__);
-		ret = -EINVAL;
-		goto unlock_ret;
-	}
-	edp_clock_synchrous(ctrl, 1);
-
-	/* Configure eDP timing to HW */
-	edp_write(ctrl->base + REG_EDP_TOTAL_HOR_VER,
-		EDP_TOTAL_HOR_VER_HORIZ(mode->htotal) |
-		EDP_TOTAL_HOR_VER_VERT(mode->vtotal));
-
-	vstart_from_sync = mode->vtotal - mode->vsync_start;
-	hstart_from_sync = mode->htotal - mode->hsync_start;
-	edp_write(ctrl->base + REG_EDP_START_HOR_VER_FROM_SYNC,
-		EDP_START_HOR_VER_FROM_SYNC_HORIZ(hstart_from_sync) |
-		EDP_START_HOR_VER_FROM_SYNC_VERT(vstart_from_sync));
-
-	data = EDP_HSYNC_VSYNC_WIDTH_POLARITY_VERT(
-			mode->vsync_end - mode->vsync_start);
-	data |= EDP_HSYNC_VSYNC_WIDTH_POLARITY_HORIZ(
-			mode->hsync_end - mode->hsync_start);
-	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
-		data |= EDP_HSYNC_VSYNC_WIDTH_POLARITY_NVSYNC;
-	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
-		data |= EDP_HSYNC_VSYNC_WIDTH_POLARITY_NHSYNC;
-	edp_write(ctrl->base + REG_EDP_HSYNC_VSYNC_WIDTH_POLARITY, data);
-
-	edp_write(ctrl->base + REG_EDP_ACTIVE_HOR_VER,
-		EDP_ACTIVE_HOR_VER_HORIZ(mode->hdisplay) |
-		EDP_ACTIVE_HOR_VER_VERT(mode->vdisplay));
-
-	edp_clk_disable(ctrl, EDP_CLK_MASK_AHB);
-
-unlock_ret:
-	mutex_unlock(&ctrl->dev_mutex);
-	return ret;
-}
-
-bool msm_edp_ctrl_pixel_clock_valid(struct edp_ctrl *ctrl,
-	u32 pixel_rate, u32 *pm, u32 *pn)
-{
-	const struct edp_pixel_clk_div *divs;
-	u32 err = 1; /* 1% error tolerance */
-	u32 clk_err;
-	int i;
-
-	if (ctrl->link_rate == DP_LINK_BW_1_62) {
-		divs = clk_divs[0];
-	} else if (ctrl->link_rate == DP_LINK_BW_2_7) {
-		divs = clk_divs[1];
-	} else {
-		pr_err("%s: Invalid link rate,%d\n", __func__, ctrl->link_rate);
-		return false;
-	}
-
-	for (i = 0; i < EDP_PIXEL_CLK_NUM; i++) {
-		clk_err = abs(divs[i].rate - pixel_rate);
-		if ((divs[i].rate * err / 100) >= clk_err) {
-			if (pm)
-				*pm = divs[i].m;
-			if (pn)
-				*pn = divs[i].n;
-			return true;
-		}
-	}
-
-	DBG("pixel clock %d(kHz) not supported", pixel_rate);
-
-	return false;
-}
-
-- 
2.35.1


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