drivers/video/msm/lvds.c - kernel/msm - Gitiles

 /* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
  * only version 2 as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/time.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
 #include <linux/delay.h>
 #include <linux/io.h>
 #include <mach/hardware.h>
 #include <mach/msm_iomap.h>
 #include <mach/clk.h>
 #include <asm/system.h>
 #include <asm/mach-types.h>
 #include <linux/semaphore.h>
 #include <linux/uaccess.h>
 #include <linux/clk.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>

 #include "msm_fb.h"
 #include "mdp4.h"
 static int lvds_probe(struct platform_device *pdev);
 static int lvds_remove(struct platform_device *pdev);

 static int lvds_off(struct platform_device *pdev);
 static int lvds_on(struct platform_device *pdev);

 static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
 static int pdev_list_cnt;

 static struct clk *lvds_clk;

 static struct platform_driver lvds_driver = {
 	.probe = lvds_probe,
 	.remove = lvds_remove,
 	.suspend = NULL,
 	.resume = NULL,
 	.shutdown = NULL,
 	.driver = {
 		   .name = "lvds",
 		   },
 };

 static struct lcdc_platform_data *lvds_pdata;

 static void lvds_init(struct msm_fb_data_type *mfd)
 {
 	unsigned int lvds_intf, lvds_phy_cfg0;

 	MDP_OUTP(MDP_BASE + 0xc2034, 0x33);
 	usleep(1000);

 	/* LVDS PHY PLL configuration */
 	MDP_OUTP(MDP_BASE + 0xc3004, 0x62);
 	MDP_OUTP(MDP_BASE + 0xc3008, 0x30);
 	MDP_OUTP(MDP_BASE + 0xc300c, 0xc4);
 	MDP_OUTP(MDP_BASE + 0xc3014, 0x10);
 	MDP_OUTP(MDP_BASE + 0xc3018, 0x05);
 	MDP_OUTP(MDP_BASE + 0xc301c, 0x62);
 	MDP_OUTP(MDP_BASE + 0xc3020, 0x41);
 	MDP_OUTP(MDP_BASE + 0xc3024, 0x0d);

 	MDP_OUTP(MDP_BASE + 0xc3000, 0x01);
 	/* Wait until LVDS PLL is locked and ready */
 	while (!readl_relaxed(MDP_BASE + 0xc3080))
 		cpu_relax();

 	writel_relaxed(0x00, mmss_cc_base + 0x0264);
 	writel_relaxed(0x00, mmss_cc_base + 0x0094);

 	writel_relaxed(0x02, mmss_cc_base + 0x00E4);

 	writel_relaxed((0x80 | readl_relaxed(mmss_cc_base + 0x00E4)),
 	       mmss_cc_base + 0x00E4);
 	usleep(1000);
 	writel_relaxed((~0x80 & readl_relaxed(mmss_cc_base + 0x00E4)),
 	       mmss_cc_base + 0x00E4);

 	writel_relaxed(0x05, mmss_cc_base + 0x0094);
 	writel_relaxed(0x02, mmss_cc_base + 0x0264);
 	/* Wait until LVDS pixel clock output is enabled */
 	mb();

 	if (mfd->panel_info.bpp == 24) {
 		if (lvds_pdata &&
 		    lvds_pdata->lvds_pixel_remap &&
 		    lvds_pdata->lvds_pixel_remap()) {
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_3_TO_0 */
 			MDP_OUTP(MDP_BASE +  0xc2014, 0x05080001);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_6_TO_4 */
 			MDP_OUTP(MDP_BASE +  0xc2018, 0x00020304);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_3_TO_0 */
 			MDP_OUTP(MDP_BASE +  0xc201c, 0x1011090a);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_6_TO_4 */
 			MDP_OUTP(MDP_BASE +  0xc2020, 0x000b0c0d);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_3_TO_0 */
 			MDP_OUTP(MDP_BASE +  0xc2024, 0x191a1213);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_6_TO_4 */
 			MDP_OUTP(MDP_BASE +  0xc2028, 0x00141518);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D3_3_TO_0 */
 			MDP_OUTP(MDP_BASE +  0xc202c, 0x171b0607);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D3_6_TO_4 */
 			MDP_OUTP(MDP_BASE +  0xc2030, 0x000e0f16);
 		} else {
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_3_TO_0 */
 			MDP_OUTP(MDP_BASE +  0xc2014, 0x03040508);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_6_TO_4 */
 			MDP_OUTP(MDP_BASE +  0xc2018, 0x00000102);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_3_TO_0 */
 			MDP_OUTP(MDP_BASE +  0xc201c, 0x0c0d1011);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_6_TO_4 */
 			MDP_OUTP(MDP_BASE +  0xc2020, 0x00090a0b);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_3_TO_0 */
 			MDP_OUTP(MDP_BASE +  0xc2024, 0x151a191a);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_6_TO_4 */
 			MDP_OUTP(MDP_BASE +  0xc2028, 0x00121314);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D3_3_TO_0 */
 			MDP_OUTP(MDP_BASE +  0xc202c, 0x0f16171b);
 			/* MDP_LCDC_LVDS_MUX_CTL_FOR_D3_6_TO_4 */
 			MDP_OUTP(MDP_BASE +  0xc2030, 0x0006070e);
 		}
 		if (mfd->panel_info.lvds.channel_mode ==
 			LVDS_DUAL_CHANNEL_MODE) {
 			lvds_intf = 0x0001ff80;
 			lvds_phy_cfg0 = BIT(6) | BIT(7);
 			if (mfd->panel_info.lvds.channel_swap)
 				lvds_intf |= BIT(4);
 		} else {
 			lvds_intf = 0x00010f84;
 			lvds_phy_cfg0 = BIT(6);
 		}
 	} else if (mfd->panel_info.bpp == 18) {
 		/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_3_TO_0 */
 		MDP_OUTP(MDP_BASE +  0xc2014, 0x03040508);
 		/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_6_TO_4 */
 		MDP_OUTP(MDP_BASE +  0xc2018, 0x00000102);
 		/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_3_TO_0 */
 		MDP_OUTP(MDP_BASE +  0xc201c, 0x0c0d1011);
 		/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_6_TO_4 */
 		MDP_OUTP(MDP_BASE +  0xc2020, 0x00090a0b);
 		/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_3_TO_0 */
 		MDP_OUTP(MDP_BASE +  0xc2024, 0x1518191a);
 		/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_6_TO_4 */
 		MDP_OUTP(MDP_BASE +  0xc2028, 0x00121314);

 		if (mfd->panel_info.lvds.channel_mode ==
 			LVDS_DUAL_CHANNEL_MODE) {
 			lvds_intf = 0x00017788;
 			lvds_phy_cfg0 = BIT(6) | BIT(7);
 			if (mfd->panel_info.lvds.channel_swap)
 				lvds_intf |= BIT(4);
 		} else {
 			lvds_intf = 0x0001078c;
 			lvds_phy_cfg0 = BIT(6);
 		}
 	} else {
 		BUG();
 	}

 	/* MDP_LVDSPHY_CFG0 */
 	MDP_OUTP(MDP_BASE +  0xc3100, lvds_phy_cfg0);
 	/* MDP_LCDC_LVDS_INTF_CTL */
 	MDP_OUTP(MDP_BASE +  0xc2000, lvds_intf);
 	MDP_OUTP(MDP_BASE +  0xc3108, 0x30);
 	lvds_phy_cfg0 |= BIT(4);

 	/* Wait until LVDS PHY registers are configured */
 	mb();
 	usleep(1);
 	/* MDP_LVDSPHY_CFG0, enable serialization */
 	MDP_OUTP(MDP_BASE +  0xc3100, lvds_phy_cfg0);
 }

 static int lvds_off(struct platform_device *pdev)
 {
 	int ret = 0;
 	struct msm_fb_data_type *mfd;

 	mfd = platform_get_drvdata(pdev);
 	ret = panel_next_off(pdev);

 	if (lvds_clk)
 		clk_disable_unprepare(lvds_clk);

 	MDP_OUTP(MDP_BASE +  0xc3100, 0x0);
 	MDP_OUTP(MDP_BASE + 0xc3000, 0x0);
 	usleep(10);

 	if (lvds_pdata && lvds_pdata->lcdc_power_save)
 		lvds_pdata->lcdc_power_save(0);

 	if (lvds_pdata && lvds_pdata->lcdc_gpio_config)
 		ret = lvds_pdata->lcdc_gpio_config(0);

 #ifdef CONFIG_MSM_BUS_SCALING
 	mdp_bus_scale_update_request(0);
 #endif

 	return ret;
 }

 static int lvds_on(struct platform_device *pdev)
 {
 	int ret = 0;
 	struct msm_fb_data_type *mfd;
 	unsigned long panel_pixclock_freq = 0;
 	mfd = platform_get_drvdata(pdev);

 	if (lvds_pdata && lvds_pdata->lcdc_get_clk)
 		panel_pixclock_freq = lvds_pdata->lcdc_get_clk();

 	if (!panel_pixclock_freq)
 		panel_pixclock_freq = mfd->fbi->var.pixclock;
 #ifdef CONFIG_MSM_BUS_SCALING
 	mdp_bus_scale_update_request(2);
 #endif
 	mfd = platform_get_drvdata(pdev);

 	if (lvds_clk) {
 		mfd->fbi->var.pixclock = clk_round_rate(lvds_clk,
 			mfd->fbi->var.pixclock);
 		ret = clk_set_rate(lvds_clk, mfd->fbi->var.pixclock);
 		if (ret) {
 			pr_err("%s: Can't set lvds clock to rate %u\n",
 				__func__, mfd->fbi->var.pixclock);
 			goto out;
 		}
 		clk_prepare_enable(lvds_clk);
 	}

 	if (lvds_pdata && lvds_pdata->lcdc_power_save)
 		lvds_pdata->lcdc_power_save(1);
 	if (lvds_pdata && lvds_pdata->lcdc_gpio_config)
 		ret = lvds_pdata->lcdc_gpio_config(1);

 	lvds_init(mfd);
 	ret = panel_next_on(pdev);

 out:
 	return ret;
 }

 static int lvds_probe(struct platform_device *pdev)
 {
 	struct msm_fb_data_type *mfd;
 	struct fb_info *fbi;
 	struct platform_device *mdp_dev = NULL;
 	struct msm_fb_panel_data *pdata = NULL;
 	int rc;

 	if (pdev->id == 0) {
 		lvds_pdata = pdev->dev.platform_data;

 		lvds_clk = clk_get(&pdev->dev, "lvds_clk");
 		if (IS_ERR_OR_NULL(lvds_clk)) {
 			pr_err("Couldnt find lvds_clk\n");
 			lvds_clk = NULL;
 		}
 		return 0;
 	}

 	mfd = platform_get_drvdata(pdev);

 	if (!mfd)
 		return -ENODEV;

 	if (mfd->key != MFD_KEY)
 		return -EINVAL;

 	if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST)
 		return -ENOMEM;

 	mdp_dev = platform_device_alloc("mdp", pdev->id);
 	if (!mdp_dev)
 		return -ENOMEM;

 	/*
 	 * link to the latest pdev
 	 */
 	mfd->pdev = mdp_dev;
 	mfd->dest = DISPLAY_LCDC;

 	/*
 	 * alloc panel device data
 	 */
 	if (platform_device_add_data
 	    (mdp_dev, pdev->dev.platform_data,
 	     sizeof(struct msm_fb_panel_data))) {
 		pr_err("lvds_probe: platform_device_add_data failed!\n");
 		platform_device_put(mdp_dev);
 		return -ENOMEM;
 	}
 	/*
 	 * data chain
 	 */
 	pdata = (struct msm_fb_panel_data *)mdp_dev->dev.platform_data;
 	pdata->on = lvds_on;
 	pdata->off = lvds_off;
 	pdata->next = pdev;

 	/*
 	 * get/set panel specific fb info
 	 */
 	mfd->panel_info = pdata->panel_info;

 	if (mfd->index == 0)
 		mfd->fb_imgType = MSMFB_DEFAULT_TYPE;
 	else
 		mfd->fb_imgType = MDP_RGB_565;

 	fbi = mfd->fbi;
 	if (lvds_clk) {
 		fbi->var.pixclock = clk_round_rate(lvds_clk,
 			mfd->panel_info.clk_rate);
 	}

 	fbi->var.left_margin = mfd->panel_info.lcdc.h_back_porch;
 	fbi->var.right_margin = mfd->panel_info.lcdc.h_front_porch;
 	fbi->var.upper_margin = mfd->panel_info.lcdc.v_back_porch;
 	fbi->var.lower_margin = mfd->panel_info.lcdc.v_front_porch;
 	fbi->var.hsync_len = mfd->panel_info.lcdc.h_pulse_width;
 	fbi->var.vsync_len = mfd->panel_info.lcdc.v_pulse_width;

 	/*
 	 * set driver data
 	 */
 	platform_set_drvdata(mdp_dev, mfd);
 	/*
 	 * register in mdp driver
 	 */
 	rc = platform_device_add(mdp_dev);
 	if (rc)
 		goto lvds_probe_err;

 	pdev_list[pdev_list_cnt++] = pdev;

 	return 0;

 lvds_probe_err:
 	platform_device_put(mdp_dev);
 	return rc;
 }

 static int lvds_remove(struct platform_device *pdev)
 {
 	return 0;
 }

 static int lvds_register_driver(void)
 {
 	return platform_driver_register(&lvds_driver);
 }

 static int __init lvds_driver_init(void)
 {
 	return lvds_register_driver();
 }

 module_init(lvds_driver_init);
	/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 and
	* only version 2 as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/sched.h>
	#include <linux/time.h>
	#include <linux/init.h>
	#include <linux/interrupt.h>
	#include <linux/spinlock.h>
	#include <linux/delay.h>
	#include <linux/io.h>
	#include <mach/hardware.h>
	#include <mach/msm_iomap.h>
	#include <mach/clk.h>
	#include <asm/system.h>
	#include <asm/mach-types.h>
	#include <linux/semaphore.h>
	#include <linux/uaccess.h>
	#include <linux/clk.h>
	#include <linux/platform_device.h>
	#include <linux/regulator/consumer.h>

	#include "msm_fb.h"
	#include "mdp4.h"
	static int lvds_probe(struct platform_device *pdev);
	static int lvds_remove(struct platform_device *pdev);

	static int lvds_off(struct platform_device *pdev);
	static int lvds_on(struct platform_device *pdev);

	static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
	static int pdev_list_cnt;

	static struct clk *lvds_clk;

	static struct platform_driver lvds_driver = {
	.probe = lvds_probe,
	.remove = lvds_remove,
	.suspend = NULL,
	.resume = NULL,
	.shutdown = NULL,
	.driver = {
	.name = "lvds",
	},
	};

	static struct lcdc_platform_data *lvds_pdata;

	static void lvds_init(struct msm_fb_data_type *mfd)
	{
	unsigned int lvds_intf, lvds_phy_cfg0;

	MDP_OUTP(MDP_BASE + 0xc2034, 0x33);
	usleep(1000);

	/* LVDS PHY PLL configuration */
	MDP_OUTP(MDP_BASE + 0xc3004, 0x62);
	MDP_OUTP(MDP_BASE + 0xc3008, 0x30);
	MDP_OUTP(MDP_BASE + 0xc300c, 0xc4);
	MDP_OUTP(MDP_BASE + 0xc3014, 0x10);
	MDP_OUTP(MDP_BASE + 0xc3018, 0x05);
	MDP_OUTP(MDP_BASE + 0xc301c, 0x62);
	MDP_OUTP(MDP_BASE + 0xc3020, 0x41);
	MDP_OUTP(MDP_BASE + 0xc3024, 0x0d);

	MDP_OUTP(MDP_BASE + 0xc3000, 0x01);
	/* Wait until LVDS PLL is locked and ready */
	while (!readl_relaxed(MDP_BASE + 0xc3080))
	cpu_relax();

	writel_relaxed(0x00, mmss_cc_base + 0x0264);
	writel_relaxed(0x00, mmss_cc_base + 0x0094);

	writel_relaxed(0x02, mmss_cc_base + 0x00E4);

	writel_relaxed((0x80 \| readl_relaxed(mmss_cc_base + 0x00E4)),
	mmss_cc_base + 0x00E4);
	usleep(1000);
	writel_relaxed((~0x80 & readl_relaxed(mmss_cc_base + 0x00E4)),
	mmss_cc_base + 0x00E4);

	writel_relaxed(0x05, mmss_cc_base + 0x0094);
	writel_relaxed(0x02, mmss_cc_base + 0x0264);
	/* Wait until LVDS pixel clock output is enabled */
	mb();

	if (mfd->panel_info.bpp == 24) {
	if (lvds_pdata &&
	lvds_pdata->lvds_pixel_remap &&
	lvds_pdata->lvds_pixel_remap()) {
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_3_TO_0 */
	MDP_OUTP(MDP_BASE + 0xc2014, 0x05080001);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_6_TO_4 */
	MDP_OUTP(MDP_BASE + 0xc2018, 0x00020304);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_3_TO_0 */
	MDP_OUTP(MDP_BASE + 0xc201c, 0x1011090a);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_6_TO_4 */
	MDP_OUTP(MDP_BASE + 0xc2020, 0x000b0c0d);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_3_TO_0 */
	MDP_OUTP(MDP_BASE + 0xc2024, 0x191a1213);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_6_TO_4 */
	MDP_OUTP(MDP_BASE + 0xc2028, 0x00141518);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D3_3_TO_0 */
	MDP_OUTP(MDP_BASE + 0xc202c, 0x171b0607);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D3_6_TO_4 */
	MDP_OUTP(MDP_BASE + 0xc2030, 0x000e0f16);
	} else {
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_3_TO_0 */
	MDP_OUTP(MDP_BASE + 0xc2014, 0x03040508);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_6_TO_4 */
	MDP_OUTP(MDP_BASE + 0xc2018, 0x00000102);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_3_TO_0 */
	MDP_OUTP(MDP_BASE + 0xc201c, 0x0c0d1011);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_6_TO_4 */
	MDP_OUTP(MDP_BASE + 0xc2020, 0x00090a0b);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_3_TO_0 */
	MDP_OUTP(MDP_BASE + 0xc2024, 0x151a191a);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_6_TO_4 */
	MDP_OUTP(MDP_BASE + 0xc2028, 0x00121314);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D3_3_TO_0 */
	MDP_OUTP(MDP_BASE + 0xc202c, 0x0f16171b);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D3_6_TO_4 */
	MDP_OUTP(MDP_BASE + 0xc2030, 0x0006070e);
	}
	if (mfd->panel_info.lvds.channel_mode ==
	LVDS_DUAL_CHANNEL_MODE) {
	lvds_intf = 0x0001ff80;
	lvds_phy_cfg0 = BIT(6) \| BIT(7);
	if (mfd->panel_info.lvds.channel_swap)
	lvds_intf \|= BIT(4);
	} else {
	lvds_intf = 0x00010f84;
	lvds_phy_cfg0 = BIT(6);
	}
	} else if (mfd->panel_info.bpp == 18) {
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_3_TO_0 */
	MDP_OUTP(MDP_BASE + 0xc2014, 0x03040508);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D0_6_TO_4 */
	MDP_OUTP(MDP_BASE + 0xc2018, 0x00000102);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_3_TO_0 */
	MDP_OUTP(MDP_BASE + 0xc201c, 0x0c0d1011);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D1_6_TO_4 */
	MDP_OUTP(MDP_BASE + 0xc2020, 0x00090a0b);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_3_TO_0 */
	MDP_OUTP(MDP_BASE + 0xc2024, 0x1518191a);
	/* MDP_LCDC_LVDS_MUX_CTL_FOR_D2_6_TO_4 */
	MDP_OUTP(MDP_BASE + 0xc2028, 0x00121314);

	if (mfd->panel_info.lvds.channel_mode ==
	LVDS_DUAL_CHANNEL_MODE) {
	lvds_intf = 0x00017788;
	lvds_phy_cfg0 = BIT(6) \| BIT(7);
	if (mfd->panel_info.lvds.channel_swap)
	lvds_intf \|= BIT(4);
	} else {
	lvds_intf = 0x0001078c;
	lvds_phy_cfg0 = BIT(6);
	}
	} else {
	BUG();
	}

	/* MDP_LVDSPHY_CFG0 */
	MDP_OUTP(MDP_BASE + 0xc3100, lvds_phy_cfg0);
	/* MDP_LCDC_LVDS_INTF_CTL */
	MDP_OUTP(MDP_BASE + 0xc2000, lvds_intf);
	MDP_OUTP(MDP_BASE + 0xc3108, 0x30);
	lvds_phy_cfg0 \|= BIT(4);

	/* Wait until LVDS PHY registers are configured */
	mb();
	usleep(1);
	/* MDP_LVDSPHY_CFG0, enable serialization */
	MDP_OUTP(MDP_BASE + 0xc3100, lvds_phy_cfg0);
	}

	static int lvds_off(struct platform_device *pdev)
	{
	int ret = 0;
	struct msm_fb_data_type *mfd;

	mfd = platform_get_drvdata(pdev);
	ret = panel_next_off(pdev);

	if (lvds_clk)
	clk_disable_unprepare(lvds_clk);

	MDP_OUTP(MDP_BASE + 0xc3100, 0x0);
	MDP_OUTP(MDP_BASE + 0xc3000, 0x0);
	usleep(10);

	if (lvds_pdata && lvds_pdata->lcdc_power_save)
	lvds_pdata->lcdc_power_save(0);

	if (lvds_pdata && lvds_pdata->lcdc_gpio_config)
	ret = lvds_pdata->lcdc_gpio_config(0);

	#ifdef CONFIG_MSM_BUS_SCALING
	mdp_bus_scale_update_request(0);
	#endif

	return ret;
	}

	static int lvds_on(struct platform_device *pdev)
	{
	int ret = 0;
	struct msm_fb_data_type *mfd;
	unsigned long panel_pixclock_freq = 0;
	mfd = platform_get_drvdata(pdev);

	if (lvds_pdata && lvds_pdata->lcdc_get_clk)
	panel_pixclock_freq = lvds_pdata->lcdc_get_clk();

	if (!panel_pixclock_freq)
	panel_pixclock_freq = mfd->fbi->var.pixclock;
	#ifdef CONFIG_MSM_BUS_SCALING
	mdp_bus_scale_update_request(2);
	#endif
	mfd = platform_get_drvdata(pdev);

	if (lvds_clk) {
	mfd->fbi->var.pixclock = clk_round_rate(lvds_clk,
	mfd->fbi->var.pixclock);
	ret = clk_set_rate(lvds_clk, mfd->fbi->var.pixclock);
	if (ret) {
	pr_err("%s: Can't set lvds clock to rate %u\n",
	__func__, mfd->fbi->var.pixclock);
	goto out;
	}
	clk_prepare_enable(lvds_clk);
	}

	if (lvds_pdata && lvds_pdata->lcdc_power_save)
	lvds_pdata->lcdc_power_save(1);
	if (lvds_pdata && lvds_pdata->lcdc_gpio_config)
	ret = lvds_pdata->lcdc_gpio_config(1);

	lvds_init(mfd);
	ret = panel_next_on(pdev);

	out:
	return ret;
	}

	static int lvds_probe(struct platform_device *pdev)
	{
	struct msm_fb_data_type *mfd;
	struct fb_info *fbi;
	struct platform_device *mdp_dev = NULL;
	struct msm_fb_panel_data *pdata = NULL;
	int rc;

	if (pdev->id == 0) {
	lvds_pdata = pdev->dev.platform_data;

	lvds_clk = clk_get(&pdev->dev, "lvds_clk");
	if (IS_ERR_OR_NULL(lvds_clk)) {
	pr_err("Couldnt find lvds_clk\n");
	lvds_clk = NULL;
	}
	return 0;
	}

	mfd = platform_get_drvdata(pdev);

	if (!mfd)
	return -ENODEV;

	if (mfd->key != MFD_KEY)
	return -EINVAL;

	if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST)
	return -ENOMEM;

	mdp_dev = platform_device_alloc("mdp", pdev->id);
	if (!mdp_dev)
	return -ENOMEM;

	/*
	* link to the latest pdev
	*/
	mfd->pdev = mdp_dev;
	mfd->dest = DISPLAY_LCDC;

	/*
	* alloc panel device data
	*/
	if (platform_device_add_data
	(mdp_dev, pdev->dev.platform_data,
	sizeof(struct msm_fb_panel_data))) {
	pr_err("lvds_probe: platform_device_add_data failed!\n");
	platform_device_put(mdp_dev);
	return -ENOMEM;
	}
	/*
	* data chain
	*/
	pdata = (struct msm_fb_panel_data *)mdp_dev->dev.platform_data;
	pdata->on = lvds_on;
	pdata->off = lvds_off;
	pdata->next = pdev;

	/*
	* get/set panel specific fb info
	*/
	mfd->panel_info = pdata->panel_info;

	if (mfd->index == 0)
	mfd->fb_imgType = MSMFB_DEFAULT_TYPE;
	else
	mfd->fb_imgType = MDP_RGB_565;

	fbi = mfd->fbi;
	if (lvds_clk) {
	fbi->var.pixclock = clk_round_rate(lvds_clk,
	mfd->panel_info.clk_rate);
	}

	fbi->var.left_margin = mfd->panel_info.lcdc.h_back_porch;
	fbi->var.right_margin = mfd->panel_info.lcdc.h_front_porch;
	fbi->var.upper_margin = mfd->panel_info.lcdc.v_back_porch;
	fbi->var.lower_margin = mfd->panel_info.lcdc.v_front_porch;
	fbi->var.hsync_len = mfd->panel_info.lcdc.h_pulse_width;
	fbi->var.vsync_len = mfd->panel_info.lcdc.v_pulse_width;

	/*
	* set driver data
	*/
	platform_set_drvdata(mdp_dev, mfd);
	/*
	* register in mdp driver
	*/
	rc = platform_device_add(mdp_dev);
	if (rc)
	goto lvds_probe_err;

	pdev_list[pdev_list_cnt++] = pdev;

	return 0;

	lvds_probe_err:
	platform_device_put(mdp_dev);
	return rc;
	}

	static int lvds_remove(struct platform_device *pdev)
	{
	return 0;
	}

	static int lvds_register_driver(void)
	{
	return platform_driver_register(&lvds_driver);
	}

	static int __init lvds_driver_init(void)
	{
	return lvds_register_driver();
	}

	module_init(lvds_driver_init);