drivers/video/msm/mdp.c

/* drivers/video/msm_fb/mdp.c
 *
 * MSM MDP Interface (used by framebuffer core)
 *
 * Copyright (c) 2007-2011, Code Aurora Forum. All rights reserved.
 * Copyright (C) 2007 Google Incorporated
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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/hrtimer.h>
#include <linux/clk.h>
#include <mach/hardware.h>
#include <linux/io.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/memory_alloc.h>
#include <asm/system.h>
#include <asm/mach-types.h>
#include <linux/semaphore.h>
#include <linux/uaccess.h>
#include <mach/clk.h>
#include "mdp.h"
#include "msm_fb.h"
#ifdef CONFIG_FB_MSM_MDP40
#include "mdp4.h"
#endif
#include "mipi_dsi.h"

uint32 mdp4_extn_disp;

static struct clk *mdp_clk;
static struct clk *mdp_pclk;
static struct clk *mdp_lut_clk;
int mdp_rev;

static struct regulator *footswitch;
static unsigned int mdp_footswitch_on;

struct completion mdp_ppp_comp;
struct semaphore mdp_ppp_mutex;
struct semaphore mdp_pipe_ctrl_mutex;

unsigned long mdp_timer_duration = (HZ/20);   /* 50 msecond */

boolean mdp_ppp_waiting = FALSE;
uint32 mdp_tv_underflow_cnt;
uint32 mdp_lcdc_underflow_cnt;

boolean mdp_current_clk_on = FALSE;
boolean mdp_is_in_isr = FALSE;

/*
 * legacy mdp_in_processing is only for DMA2-MDDI
 * this applies to DMA2 block only
 */
uint32 mdp_in_processing = FALSE;

#ifdef CONFIG_FB_MSM_MDP40
uint32 mdp_intr_mask = MDP4_ANY_INTR_MASK;
#else
uint32 mdp_intr_mask = MDP_ANY_INTR_MASK;
#endif

MDP_BLOCK_TYPE mdp_debug[MDP_MAX_BLOCK];

atomic_t mdp_block_power_cnt[MDP_MAX_BLOCK];

spinlock_t mdp_spin_lock;
struct workqueue_struct *mdp_dma_wq;	/*mdp dma wq */
struct workqueue_struct *mdp_vsync_wq;	/*mdp vsync wq */

static struct workqueue_struct *mdp_pipe_ctrl_wq; /* mdp mdp pipe ctrl wq */
static struct delayed_work mdp_pipe_ctrl_worker;

static boolean mdp_suspended = FALSE;
DEFINE_MUTEX(mdp_suspend_mutex);

#ifdef CONFIG_FB_MSM_MDP40
struct mdp_dma_data dma2_data;
struct mdp_dma_data dma_s_data;
struct mdp_dma_data dma_e_data;
ulong mdp4_display_intf;
#else
static struct mdp_dma_data dma2_data;
static struct mdp_dma_data dma_s_data;
#ifndef CONFIG_FB_MSM_MDP303
static struct mdp_dma_data dma_e_data;
#endif
#endif
static struct mdp_dma_data dma3_data;

extern ktime_t mdp_dma2_last_update_time;

extern uint32 mdp_dma2_update_time_in_usec;
extern int mdp_lcd_rd_cnt_offset_slow;
extern int mdp_lcd_rd_cnt_offset_fast;
extern int mdp_usec_diff_threshold;

#ifdef CONFIG_FB_MSM_LCDC
extern int first_pixel_start_x;
extern int first_pixel_start_y;
#endif

#ifdef MSM_FB_ENABLE_DBGFS
struct dentry *mdp_dir;
#endif

#if defined(CONFIG_PM) && !defined(CONFIG_HAS_EARLYSUSPEND)
static int mdp_suspend(struct platform_device *pdev, pm_message_t state);
#else
#define mdp_suspend NULL
#endif

struct timeval mdp_dma2_timeval;
struct timeval mdp_ppp_timeval;

#ifdef CONFIG_HAS_EARLYSUSPEND
static struct early_suspend early_suspend;
#endif

static u32 mdp_irq;

static uint32 mdp_prim_panel_type = NO_PANEL;
#ifndef CONFIG_FB_MSM_MDP22
DEFINE_MUTEX(mdp_lut_push_sem);
static int mdp_lut_i;
static int mdp_lut_hw_update(struct fb_cmap *cmap)
{
	int i;
	u16 *c[3];
	u16 r, g, b;

	c[0] = cmap->green;
	c[1] = cmap->blue;
	c[2] = cmap->red;

	for (i = 0; i < cmap->len; i++) {
		if (copy_from_user(&r, cmap->red++, sizeof(r)) ||
		    copy_from_user(&g, cmap->green++, sizeof(g)) ||
		    copy_from_user(&b, cmap->blue++, sizeof(b)))
			return -EFAULT;

#ifdef CONFIG_FB_MSM_MDP40
		MDP_OUTP(MDP_BASE + 0x94800 +
#else
		MDP_OUTP(MDP_BASE + 0x93800 +
#endif
			(0x400*mdp_lut_i) + cmap->start*4 + i*4,
				((g & 0xff) |
				 ((b & 0xff) << 8) |
				 ((r & 0xff) << 16)));
	}

	return 0;
}

static int mdp_lut_push;
static int mdp_lut_push_i;
static int mdp_lut_update_nonlcdc(struct fb_info *info, struct fb_cmap *cmap)
{
	int ret;

	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
	ret = mdp_lut_hw_update(cmap);
	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);

	if (ret)
		return ret;

	mutex_lock(&mdp_lut_push_sem);
	mdp_lut_push = 1;
	mdp_lut_push_i = mdp_lut_i;
	mutex_unlock(&mdp_lut_push_sem);

	mdp_lut_i = (mdp_lut_i + 1)%2;

	return 0;
}

static int mdp_lut_update_lcdc(struct fb_info *info, struct fb_cmap *cmap)
{
	int ret;

	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
	ret = mdp_lut_hw_update(cmap);

	if (ret) {
		mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);
		return ret;
	}

	MDP_OUTP(MDP_BASE + 0x90070, (mdp_lut_i << 10) | 0x17);
	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);
	mdp_lut_i = (mdp_lut_i + 1)%2;

	return 0;
}

static void mdp_lut_enable(void)
{
	if (mdp_lut_push) {
		mutex_lock(&mdp_lut_push_sem);
		mdp_lut_push = 0;
		MDP_OUTP(MDP_BASE + 0x90070,
				(mdp_lut_push_i << 10) | 0x17);
		mutex_unlock(&mdp_lut_push_sem);
	}
}

#define MDP_REV42_HIST_MAX_BIN 128
#define MDP_REV41_HIST_MAX_BIN 32

#ifdef CONFIG_FB_MSM_MDP40
unsigned int mdp_hist_frame_cnt;
struct completion mdp_hist_comp;
boolean mdp_is_hist_start = FALSE;
#else
static unsigned int mdp_hist_frame_cnt;
static struct completion mdp_hist_comp;
static boolean mdp_is_hist_start = FALSE;
#endif
static DEFINE_MUTEX(mdp_hist_mutex);
static boolean mdp_is_hist_data = FALSE;

/*should hold mdp_hist_mutex before calling this function*/
int _mdp_histogram_ctrl(boolean en)
{
	unsigned long flag;
	unsigned long hist_base;
	uint32_t status;

	if (mdp_rev >= MDP_REV_40)
		hist_base = 0x95000;
	else
		hist_base = 0x94000;

	if (en == TRUE) {
		if (mdp_is_hist_start)
			return -EINVAL;

		mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
		mdp_hist_frame_cnt = 1;
		mdp_enable_irq(MDP_HISTOGRAM_TERM);
		spin_lock_irqsave(&mdp_spin_lock, flag);
		if (mdp_is_hist_start == FALSE && mdp_rev >= MDP_REV_40) {
			MDP_OUTP(MDP_BASE + hist_base + 0x10, 1);
			MDP_OUTP(MDP_BASE + hist_base + 0x1c, INTR_HIST_DONE);
		}
		spin_unlock_irqrestore(&mdp_spin_lock, flag);
		MDP_OUTP(MDP_BASE + hist_base + 0x4, mdp_hist_frame_cnt);
		MDP_OUTP(MDP_BASE + hist_base, 1);
		mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);
		mdp_is_hist_data = TRUE;
	} else {
		if (!mdp_is_hist_start && !mdp_is_hist_data)
			return -EINVAL;

		mdp_is_hist_data = FALSE;
		complete(&mdp_hist_comp);

		if (mdp_rev >= MDP_REV_40) {
			mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
			status = inpdw(MDP_BASE + hist_base + 0x1C);
			status &= ~INTR_HIST_DONE;
			MDP_OUTP(MDP_BASE + hist_base + 0x1C, status);

			MDP_OUTP(MDP_BASE + hist_base + 0x18, INTR_HIST_DONE);
			mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF,
									FALSE);
		}

		mdp_disable_irq(MDP_HISTOGRAM_TERM);
	}

	return 0;
}

int mdp_histogram_ctrl(boolean en)
{
	int ret = 0;
	mutex_lock(&mdp_hist_mutex);
	ret = _mdp_histogram_ctrl(en);
	mutex_unlock(&mdp_hist_mutex);
	return ret;
}

int mdp_start_histogram(struct fb_info *info)
{
	unsigned long flag;

	int ret = 0;
	mutex_lock(&mdp_hist_mutex);
	if (mdp_is_hist_start == TRUE) {
		printk(KERN_ERR "%s histogram already started\n", __func__);
		ret = -EPERM;
		goto mdp_hist_start_err;
	}

	ret = _mdp_histogram_ctrl(TRUE);

	spin_lock_irqsave(&mdp_spin_lock, flag);
	mdp_is_hist_start = TRUE;
	spin_unlock_irqrestore(&mdp_spin_lock, flag);

mdp_hist_start_err:
	mutex_unlock(&mdp_hist_mutex);
	return ret;

}

int mdp_stop_histogram(struct fb_info *info)
{
	unsigned long flag;
	int ret = 0;
	mutex_lock(&mdp_hist_mutex);
	if (!mdp_is_hist_start) {
		printk(KERN_ERR "%s histogram already stopped\n", __func__);
		ret = -EPERM;
		goto mdp_hist_stop_err;
	}

	spin_lock_irqsave(&mdp_spin_lock, flag);
	mdp_is_hist_start = FALSE;
	spin_unlock_irqrestore(&mdp_spin_lock, flag);

	ret = _mdp_histogram_ctrl(FALSE);

mdp_hist_stop_err:
	mutex_unlock(&mdp_hist_mutex);
	return ret;
}

/*call from within mdp_hist_mutex*/
static int _mdp_copy_hist_data(struct mdp_histogram *hist)
{
	char *mdp_hist_base;
	uint32 r_data_offset = 0x100, g_data_offset = 0x200;
	uint32 b_data_offset = 0x300;
	int ret = 0;

	if (mdp_rev >= MDP_REV_42) {
		mdp_hist_base = MDP_BASE + 0x95000;
		r_data_offset = 0x400;
		g_data_offset = 0x800;
		b_data_offset = 0xc00;
	} else if (mdp_rev >= MDP_REV_40 && mdp_rev <= MDP_REV_41) {
		mdp_hist_base = MDP_BASE + 0x95000;
	} else if (mdp_rev >= MDP_REV_30 && mdp_rev <= MDP_REV_31) {
		mdp_hist_base = MDP_BASE + 0x94000;
	} else {
		pr_err("%s(): Unsupported MDP rev %u\n", __func__, mdp_rev);
		return -EPERM;
	}

	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
	if (hist->r) {
		ret = copy_to_user(hist->r, mdp_hist_base + r_data_offset,
			hist->bin_cnt * 4);
		if (ret)
			goto hist_err;
	}
	if (hist->g) {
		ret = copy_to_user(hist->g, mdp_hist_base + g_data_offset,
			hist->bin_cnt * 4);
		if (ret)
			goto hist_err;
	}
	if (hist->b) {
		ret = copy_to_user(hist->b, mdp_hist_base + b_data_offset,
			hist->bin_cnt * 4);
		if (ret)
			goto hist_err;
	}

	if (mdp_is_hist_start == TRUE) {
		MDP_OUTP(mdp_hist_base + 0x004,
				mdp_hist_frame_cnt);
		MDP_OUTP(mdp_hist_base, 1);
	}
	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);
	return 0;

hist_err:
	printk(KERN_ERR "%s: invalid hist buffer\n", __func__);
	return ret;
}

static int mdp_do_histogram(struct fb_info *info, struct mdp_histogram *hist)
{
	int ret = 0;

	if (!hist->frame_cnt || (hist->bin_cnt == 0))
		return -EINVAL;

	if ((mdp_rev <= MDP_REV_41 && hist->bin_cnt > MDP_REV41_HIST_MAX_BIN)
		|| (mdp_rev == MDP_REV_42 &&
		hist->bin_cnt > MDP_REV42_HIST_MAX_BIN))
		return -EINVAL;

	mutex_lock(&mdp_hist_mutex);
	if (!mdp_is_hist_data) {
		ret = -EINVAL;
		goto error;
	}

	if (!mdp_is_hist_start) {
		printk(KERN_ERR "%s histogram not started\n", __func__);
		ret = -EPERM;
		goto error;
	}

	INIT_COMPLETION(mdp_hist_comp);
	mdp_hist_frame_cnt = hist->frame_cnt;
	mutex_unlock(&mdp_hist_mutex);

	wait_for_completion_killable(&mdp_hist_comp);

	mutex_lock(&mdp_hist_mutex);
	if (mdp_is_hist_data)
		ret =  _mdp_copy_hist_data(hist);
error:
	mutex_unlock(&mdp_hist_mutex);
	return ret;
}
#endif

/* Returns < 0 on error, 0 on timeout, or > 0 on successful wait */

int mdp_ppp_pipe_wait(void)
{
	int ret = 1;

	/* wait 5 seconds for the operation to complete before declaring
	the MDP hung */

	if (mdp_ppp_waiting == TRUE) {
		ret = wait_for_completion_interruptible_timeout(&mdp_ppp_comp,
								5 * HZ);

		if (!ret)
			printk(KERN_ERR "%s: Timed out waiting for the MDP.\n",
					__func__);
	}

	return ret;
}

static DEFINE_SPINLOCK(mdp_lock);
static int mdp_irq_mask;
static int mdp_irq_enabled;

/*
 * mdp_enable_irq: can not be called from isr
 */
void mdp_enable_irq(uint32 term)
{
	unsigned long irq_flags;

	spin_lock_irqsave(&mdp_lock, irq_flags);
	if (mdp_irq_mask & term) {
		printk(KERN_ERR "%s: MDP IRQ term-0x%x is already set, mask=%x irq=%d\n",
				__func__, term, mdp_irq_mask, mdp_irq_enabled);
	} else {
		mdp_irq_mask |= term;
		if (mdp_irq_mask && !mdp_irq_enabled) {
			mdp_irq_enabled = 1;
			enable_irq(mdp_irq);
		}
	}
	spin_unlock_irqrestore(&mdp_lock, irq_flags);
}

/*
 * mdp_disable_irq: can not be called from isr
 */
void mdp_disable_irq(uint32 term)
{
	unsigned long irq_flags;

	spin_lock_irqsave(&mdp_lock, irq_flags);
	if (!(mdp_irq_mask & term)) {
		printk(KERN_ERR "%s: MDP IRQ term-0x%x is NOT set, mask=%x irq=%d\n",
				__func__, term, mdp_irq_mask, mdp_irq_enabled);
	} else {
		mdp_irq_mask &= ~term;
		if (!mdp_irq_mask && mdp_irq_enabled) {
			mdp_irq_enabled = 0;
			disable_irq(mdp_irq);
		}
	}
	spin_unlock_irqrestore(&mdp_lock, irq_flags);
}

void mdp_disable_irq_nosync(uint32 term)
{
	spin_lock(&mdp_lock);
	if (!(mdp_irq_mask & term)) {
		printk(KERN_ERR "%s: MDP IRQ term-0x%x is NOT set, mask=%x irq=%d\n",
				__func__, term, mdp_irq_mask, mdp_irq_enabled);
	} else {
		mdp_irq_mask &= ~term;
		if (!mdp_irq_mask && mdp_irq_enabled) {
			mdp_irq_enabled = 0;
			disable_irq_nosync(mdp_irq);
		}
	}
	spin_unlock(&mdp_lock);
}

void mdp_pipe_kickoff(uint32 term, struct msm_fb_data_type *mfd)
{
	/* complete all the writes before starting */
	wmb();

	/* kick off PPP engine */
	if (term == MDP_PPP_TERM) {
		if (mdp_debug[MDP_PPP_BLOCK])
			jiffies_to_timeval(jiffies, &mdp_ppp_timeval);

		/* let's turn on PPP block */
		mdp_pipe_ctrl(MDP_PPP_BLOCK, MDP_BLOCK_POWER_ON, FALSE);

		mdp_enable_irq(term);
		INIT_COMPLETION(mdp_ppp_comp);
		mdp_ppp_waiting = TRUE;
		outpdw(MDP_BASE + 0x30, 0x1000);
		wait_for_completion_killable(&mdp_ppp_comp);
		mdp_disable_irq(term);

		if (mdp_debug[MDP_PPP_BLOCK]) {
			struct timeval now;

			jiffies_to_timeval(jiffies, &now);
			mdp_ppp_timeval.tv_usec =
			    now.tv_usec - mdp_ppp_timeval.tv_usec;
			MSM_FB_DEBUG("MDP-PPP: %d\n",
				    (int)mdp_ppp_timeval.tv_usec);
		}
	} else if (term == MDP_DMA2_TERM) {
		if (mdp_debug[MDP_DMA2_BLOCK]) {
			MSM_FB_DEBUG("MDP-DMA2: %d\n",
				    (int)mdp_dma2_timeval.tv_usec);
			jiffies_to_timeval(jiffies, &mdp_dma2_timeval);
		}
		/* DMA update timestamp */
		mdp_dma2_last_update_time = ktime_get_real();
		/* let's turn on DMA2 block */
#if 0
		mdp_pipe_ctrl(MDP_DMA2_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
#endif
#ifdef CONFIG_FB_MSM_MDP22
		outpdw(MDP_CMD_DEBUG_ACCESS_BASE + 0x0044, 0x0);/* start DMA */
#else
		mdp_lut_enable();

#ifdef CONFIG_FB_MSM_MDP40
		outpdw(MDP_BASE + 0x000c, 0x0);	/* start DMA */
#else
		outpdw(MDP_BASE + 0x0044, 0x0);	/* start DMA */

#ifdef CONFIG_FB_MSM_MDP303

#ifdef CONFIG_FB_MSM_MIPI_DSI
		mipi_dsi_cmd_mdp_start();
#endif

#endif

#endif
#endif
#ifdef CONFIG_FB_MSM_MDP40
	} else if (term == MDP_DMA_S_TERM) {
		mdp_pipe_ctrl(MDP_DMA_S_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
		outpdw(MDP_BASE + 0x0010, 0x0);	/* start DMA */
	} else if (term == MDP_DMA_E_TERM) {
		mdp_pipe_ctrl(MDP_DMA_E_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
		outpdw(MDP_BASE + 0x0014, 0x0);	/* start DMA */
	} else if (term == MDP_OVERLAY0_TERM) {
		mdp_pipe_ctrl(MDP_OVERLAY0_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
		mdp_lut_enable();
		outpdw(MDP_BASE + 0x0004, 0);
	} else if (term == MDP_OVERLAY1_TERM) {
		mdp_pipe_ctrl(MDP_OVERLAY1_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
		mdp_lut_enable();
		outpdw(MDP_BASE + 0x0008, 0);
	}
#else
	} else if (term == MDP_DMA_S_TERM) {
		mdp_pipe_ctrl(MDP_DMA_S_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
		outpdw(MDP_BASE + 0x0048, 0x0);	/* start DMA */
	} else if (term == MDP_DMA_E_TERM) {
		mdp_pipe_ctrl(MDP_DMA_E_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
		outpdw(MDP_BASE + 0x004C, 0x0);
	}
#endif
}
static int mdp_clk_rate;
static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
static int pdev_list_cnt;

static void mdp_pipe_ctrl_workqueue_handler(struct work_struct *work)
{
	mdp_pipe_ctrl(MDP_MASTER_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);
}
void mdp_pipe_ctrl(MDP_BLOCK_TYPE block, MDP_BLOCK_POWER_STATE state,
		   boolean isr)
{
	boolean mdp_all_blocks_off = TRUE;
	int i;
	unsigned long flag;
	struct msm_fb_panel_data *pdata;

	/*
	 * It is assumed that if isr = TRUE then start = OFF
	 * if start = ON when isr = TRUE it could happen that the usercontext
	 * could turn off the clocks while the interrupt is updating the
	 * power to ON
	 */
	WARN_ON(isr == TRUE && state == MDP_BLOCK_POWER_ON);

	spin_lock_irqsave(&mdp_spin_lock, flag);
	if (MDP_BLOCK_POWER_ON == state) {
		atomic_inc(&mdp_block_power_cnt[block]);

		if (MDP_DMA2_BLOCK == block)
			mdp_in_processing = TRUE;
	} else {
		atomic_dec(&mdp_block_power_cnt[block]);

		if (atomic_read(&mdp_block_power_cnt[block]) < 0) {
			/*
			* Master has to serve a request to power off MDP always
			* It also has a timer to power off.  So, in case of
			* timer expires first and DMA2 finishes later,
			* master has to power off two times
			* There shouldn't be multiple power-off request for
			* other blocks
			*/
			if (block != MDP_MASTER_BLOCK) {
				MSM_FB_INFO("mdp_block_power_cnt[block=%d] \
				multiple power-off request\n", block);
			}
			atomic_set(&mdp_block_power_cnt[block], 0);
		}

		if (MDP_DMA2_BLOCK == block)
			mdp_in_processing = FALSE;
	}
	spin_unlock_irqrestore(&mdp_spin_lock, flag);

	/*
	 * If it's in isr, we send our request to workqueue.
	 * Otherwise, processing happens in the current context
	 */
	if (isr) {
		if (mdp_current_clk_on) {
			/* checking all blocks power state */
			for (i = 0; i < MDP_MAX_BLOCK; i++) {
				if (atomic_read(&mdp_block_power_cnt[i]) > 0) {
					mdp_all_blocks_off = FALSE;
					break;
				}
			}

			if (mdp_all_blocks_off) {
				/* send workqueue to turn off mdp power */
				queue_delayed_work(mdp_pipe_ctrl_wq,
						   &mdp_pipe_ctrl_worker,
						   mdp_timer_duration);
			}
		}
	} else {
		down(&mdp_pipe_ctrl_mutex);
		/* checking all blocks power state */
		for (i = 0; i < MDP_MAX_BLOCK; i++) {
			if (atomic_read(&mdp_block_power_cnt[i]) > 0) {
				mdp_all_blocks_off = FALSE;
				break;
			}
		}

		/*
		 * find out whether a delayable work item is currently
		 * pending
		 */

		if (delayed_work_pending(&mdp_pipe_ctrl_worker)) {
			/*
			 * try to cancel the current work if it fails to
			 * stop (which means del_timer can't delete it
			 * from the list, it's about to expire and run),
			 * we have to let it run. queue_delayed_work won't
			 * accept the next job which is same as
			 * queue_delayed_work(mdp_timer_duration = 0)
			 */
			cancel_delayed_work(&mdp_pipe_ctrl_worker);
		}

		if ((mdp_all_blocks_off) && (mdp_current_clk_on)) {
			mutex_lock(&mdp_suspend_mutex);
			if (block == MDP_MASTER_BLOCK || mdp_suspended) {
				mdp_current_clk_on = FALSE;
				mb();
				/* turn off MDP clks */
				mdp_vsync_clk_disable();
				for (i = 0; i < pdev_list_cnt; i++) {
					pdata = (struct msm_fb_panel_data *)
						pdev_list[i]->dev.platform_data;
					if (pdata && pdata->clk_func)
						pdata->clk_func(0);
				}
				if (mdp_clk != NULL) {
					mdp_clk_rate = clk_get_rate(mdp_clk);
					clk_disable(mdp_clk);
					if (mdp_hw_revision <=
						MDP4_REVISION_V2_1 &&
						mdp_clk_rate > 122880000) {
						clk_set_rate(mdp_clk,
							 122880000);
					}
					MSM_FB_DEBUG("MDP CLK OFF\n");
				}
				if (mdp_pclk != NULL) {
					clk_disable(mdp_pclk);
					MSM_FB_DEBUG("MDP PCLK OFF\n");
				}
				if (mdp_lut_clk != NULL)
					clk_disable(mdp_lut_clk);
			} else {
				/* send workqueue to turn off mdp power */
				queue_delayed_work(mdp_pipe_ctrl_wq,
						   &mdp_pipe_ctrl_worker,
						   mdp_timer_duration);
			}
			mutex_unlock(&mdp_suspend_mutex);
		} else if ((!mdp_all_blocks_off) && (!mdp_current_clk_on)) {
			mdp_current_clk_on = TRUE;
			/* turn on MDP clks */
			for (i = 0; i < pdev_list_cnt; i++) {
				pdata = (struct msm_fb_panel_data *)
					pdev_list[i]->dev.platform_data;
				if (pdata && pdata->clk_func)
					pdata->clk_func(1);
			}
			if (mdp_clk != NULL) {
				if (mdp_hw_revision <=
					MDP4_REVISION_V2_1 &&
					mdp_clk_rate > 122880000) {
					clk_set_rate(mdp_clk,
						 mdp_clk_rate);
				}
				clk_enable(mdp_clk);
				MSM_FB_DEBUG("MDP CLK ON\n");
			}
			if (mdp_pclk != NULL) {
				clk_enable(mdp_pclk);
				MSM_FB_DEBUG("MDP PCLK ON\n");
			}
			if (mdp_lut_clk != NULL)
				clk_enable(mdp_lut_clk);
			mdp_vsync_clk_enable();
		}
		up(&mdp_pipe_ctrl_mutex);
	}
}

#ifndef CONFIG_FB_MSM_MDP40
irqreturn_t mdp_isr(int irq, void *ptr)
{
	uint32 mdp_interrupt = 0;
	struct mdp_dma_data *dma;

	mdp_is_in_isr = TRUE;
	do {
		mdp_interrupt = inp32(MDP_INTR_STATUS);
		outp32(MDP_INTR_CLEAR, mdp_interrupt);

		mdp_interrupt &= mdp_intr_mask;

		if (mdp_interrupt & TV_ENC_UNDERRUN) {
			mdp_interrupt &= ~(TV_ENC_UNDERRUN);
			mdp_tv_underflow_cnt++;
		}

		if (!mdp_interrupt)
			break;

		/* DMA3 TV-Out Start */
		if (mdp_interrupt & TV_OUT_DMA3_START) {
			/* let's disable TV out interrupt */
			mdp_intr_mask &= ~TV_OUT_DMA3_START;
			outp32(MDP_INTR_ENABLE, mdp_intr_mask);

			dma = &dma3_data;
			if (dma->waiting) {
				dma->waiting = FALSE;
				complete(&dma->comp);
			}
		}
#ifndef CONFIG_FB_MSM_MDP22
		if (mdp_interrupt & MDP_HIST_DONE) {
			outp32(MDP_BASE + 0x94018, 0x3);
			outp32(MDP_INTR_CLEAR, MDP_HIST_DONE);
			complete(&mdp_hist_comp);
		}

		/* LCDC UnderFlow */
		if (mdp_interrupt & LCDC_UNDERFLOW) {
			mdp_lcdc_underflow_cnt++;
			/*when underflow happens HW resets all the histogram
			 registers that were set before so restore them back
			 to normal.*/
			MDP_OUTP(MDP_BASE + 0x94010, 1);
			MDP_OUTP(MDP_BASE + 0x9401c, 2);
			if (mdp_is_hist_start == TRUE) {
				MDP_OUTP(MDP_BASE + 0x94004,
						 mdp_hist_frame_cnt);
				MDP_OUTP(MDP_BASE + 0x94000, 1);
			}
		}
		/* LCDC Frame Start */
		if (mdp_interrupt & LCDC_FRAME_START) {
			/* let's disable LCDC interrupt */
			mdp_intr_mask &= ~LCDC_FRAME_START;
			outp32(MDP_INTR_ENABLE, mdp_intr_mask);

			dma = &dma2_data;
			if (dma->waiting) {
				dma->waiting = FALSE;
				complete(&dma->comp);
			}
		}

		/* DMA2 LCD-Out Complete */
		if (mdp_interrupt & MDP_DMA_S_DONE) {
			dma = &dma_s_data;
			dma->busy = FALSE;
			mdp_pipe_ctrl(MDP_DMA_S_BLOCK, MDP_BLOCK_POWER_OFF,
				      TRUE);
			complete(&dma->comp);
		}
		/* DMA_E LCD-Out Complete */
		if (mdp_interrupt & MDP_DMA_E_DONE) {
			dma = &dma_s_data;
			dma->busy = FALSE;
			mdp_pipe_ctrl(MDP_DMA_E_BLOCK, MDP_BLOCK_POWER_OFF,
				TRUE);
			complete(&dma->comp);
		}

#endif

		/* DMA2 LCD-Out Complete */
		if (mdp_interrupt & MDP_DMA_P_DONE) {
			struct timeval now;

			mdp_dma2_last_update_time = ktime_sub(ktime_get_real(),
				mdp_dma2_last_update_time);
			if (mdp_debug[MDP_DMA2_BLOCK]) {
				jiffies_to_timeval(jiffies, &now);
				mdp_dma2_timeval.tv_usec =
				    now.tv_usec - mdp_dma2_timeval.tv_usec;
			}
#ifndef CONFIG_FB_MSM_MDP303
			dma = &dma2_data;
			dma->busy = FALSE;
			mdp_pipe_ctrl(MDP_DMA2_BLOCK, MDP_BLOCK_POWER_OFF,
				      TRUE);
			complete(&dma->comp);
#else
			if (mdp_prim_panel_type == MIPI_CMD_PANEL) {
				dma = &dma2_data;
				dma->busy = FALSE;
				mdp_pipe_ctrl(MDP_DMA2_BLOCK,
					MDP_BLOCK_POWER_OFF, TRUE);
				complete(&dma->comp);
			}
#endif
		}
		/* PPP Complete */
		if (mdp_interrupt & MDP_PPP_DONE) {
#ifdef	CONFIG_FB_MSM_MDP31
			MDP_OUTP(MDP_BASE + 0x00100, 0xFFFF);
#endif
			mdp_pipe_ctrl(MDP_PPP_BLOCK, MDP_BLOCK_POWER_OFF, TRUE);
			if (mdp_ppp_waiting) {
				mdp_ppp_waiting = FALSE;
				complete(&mdp_ppp_comp);
			}
		}
	} while (1);

	mdp_is_in_isr = FALSE;

	return IRQ_HANDLED;
}
#endif

static void mdp_drv_init(void)
{
	int i;

	for (i = 0; i < MDP_MAX_BLOCK; i++) {
		mdp_debug[i] = 0;
	}

	/* initialize spin lock and workqueue */
	spin_lock_init(&mdp_spin_lock);
	mdp_dma_wq = create_singlethread_workqueue("mdp_dma_wq");
	mdp_vsync_wq = create_singlethread_workqueue("mdp_vsync_wq");
	mdp_pipe_ctrl_wq = create_singlethread_workqueue("mdp_pipe_ctrl_wq");
	INIT_DELAYED_WORK(&mdp_pipe_ctrl_worker,
			  mdp_pipe_ctrl_workqueue_handler);

	/* initialize semaphore */
	init_completion(&mdp_ppp_comp);
	sema_init(&mdp_ppp_mutex, 1);
	sema_init(&mdp_pipe_ctrl_mutex, 1);

	dma2_data.busy = FALSE;
	dma2_data.dmap_busy = FALSE;
	dma2_data.waiting = FALSE;
	init_completion(&dma2_data.comp);
	init_completion(&dma2_data.dmap_comp);
	sema_init(&dma2_data.mutex, 1);
	mutex_init(&dma2_data.ov_mutex);

	dma3_data.busy = FALSE;
	dma3_data.waiting = FALSE;
	init_completion(&dma3_data.comp);
	sema_init(&dma3_data.mutex, 1);

	dma_s_data.busy = FALSE;
	dma_s_data.waiting = FALSE;
	init_completion(&dma_s_data.comp);
	sema_init(&dma_s_data.mutex, 1);

#ifndef CONFIG_FB_MSM_MDP303
	dma_e_data.busy = FALSE;
	dma_e_data.waiting = FALSE;
	init_completion(&dma_e_data.comp);
	mutex_init(&dma_e_data.ov_mutex);
#endif

#ifndef CONFIG_FB_MSM_MDP22
	init_completion(&mdp_hist_comp);
#endif

	/* initializing mdp power block counter to 0 */
	for (i = 0; i < MDP_MAX_BLOCK; i++) {
		atomic_set(&mdp_block_power_cnt[i], 0);
	}

#ifdef MSM_FB_ENABLE_DBGFS
	{
		struct dentry *root;
		char sub_name[] = "mdp";

		root = msm_fb_get_debugfs_root();
		if (root != NULL) {
			mdp_dir = debugfs_create_dir(sub_name, root);

			if (mdp_dir) {
				msm_fb_debugfs_file_create(mdp_dir,
					"dma2_update_time_in_usec",
					(u32 *) &mdp_dma2_update_time_in_usec);
				msm_fb_debugfs_file_create(mdp_dir,
					"vs_rdcnt_slow",
					(u32 *) &mdp_lcd_rd_cnt_offset_slow);
				msm_fb_debugfs_file_create(mdp_dir,
					"vs_rdcnt_fast",
					(u32 *) &mdp_lcd_rd_cnt_offset_fast);
				msm_fb_debugfs_file_create(mdp_dir,
					"mdp_usec_diff_threshold",
					(u32 *) &mdp_usec_diff_threshold);
				msm_fb_debugfs_file_create(mdp_dir,
					"mdp_current_clk_on",
					(u32 *) &mdp_current_clk_on);
#ifdef CONFIG_FB_MSM_LCDC
				msm_fb_debugfs_file_create(mdp_dir,
					"lcdc_start_x",
					(u32 *) &first_pixel_start_x);
				msm_fb_debugfs_file_create(mdp_dir,
					"lcdc_start_y",
					(u32 *) &first_pixel_start_y);
#endif
			}
		}
	}
#endif
}

static int mdp_probe(struct platform_device *pdev);
static int mdp_remove(struct platform_device *pdev);

static int mdp_runtime_suspend(struct device *dev)
{
	dev_dbg(dev, "pm_runtime: suspending...\n");
	return 0;
}

static int mdp_runtime_resume(struct device *dev)
{
	dev_dbg(dev, "pm_runtime: resuming...\n");
	return 0;
}

static struct dev_pm_ops mdp_dev_pm_ops = {
	.runtime_suspend = mdp_runtime_suspend,
	.runtime_resume = mdp_runtime_resume,
};


static struct platform_driver mdp_driver = {
	.probe = mdp_probe,
	.remove = mdp_remove,
#ifndef CONFIG_HAS_EARLYSUSPEND
	.suspend = mdp_suspend,
	.resume = NULL,
#endif
	.shutdown = NULL,
	.driver = {
		/*
		 * Driver name must match the device name added in
		 * platform.c.
		 */
		.name = "mdp",
		.pm = &mdp_dev_pm_ops,
	},
};

static int mdp_off(struct platform_device *pdev)
{
	int ret = 0;
	mdp_histogram_ctrl(FALSE);

	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
	ret = panel_next_off(pdev);
	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);

	return ret;
}

static int mdp_on(struct platform_device *pdev)
{
	int ret = 0;

#ifdef CONFIG_FB_MSM_MDP40
	struct msm_fb_data_type *mfd;
	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
	if (is_mdp4_hw_reset()) {
		mfd = platform_get_drvdata(pdev);
		mdp_vsync_cfg_regs(mfd, FALSE);
		mdp4_hw_init();
		outpdw(MDP_BASE + 0x0038, mdp4_display_intf);
	}
	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);
#endif
	mdp_histogram_ctrl(TRUE);

	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
	ret = panel_next_on(pdev);
	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);
	return ret;
}

static int mdp_resource_initialized;
static struct msm_panel_common_pdata *mdp_pdata;

uint32 mdp_hw_revision;

/*
 * mdp_hw_revision:
 * 0 == V1
 * 1 == V2
 * 2 == V2.1
 *
 */
void mdp_hw_version(void)
{
	char *cp;
	uint32 *hp;

	if (mdp_pdata == NULL)
		return;

	mdp_hw_revision = MDP4_REVISION_NONE;
	if (mdp_pdata->hw_revision_addr == 0)
		return;

	/* tlmmgpio2 shadow */
	cp = (char *)ioremap(mdp_pdata->hw_revision_addr, 0x16);

	if (cp == NULL)
		return;

	hp = (uint32 *)cp;	/* HW_REVISION_NUMBER */
	mdp_hw_revision = *hp;
	iounmap(cp);

	mdp_hw_revision >>= 28;	/* bit 31:28 */
	mdp_hw_revision &= 0x0f;

	MSM_FB_DEBUG("%s: mdp_hw_revision=%x\n",
				__func__, mdp_hw_revision);
}

#ifdef CONFIG_FB_MSM_MDP40
static void configure_mdp_core_clk_table(uint32 min_clk_rate)
{
	uint8 count;
	uint32 current_rate;
	if (mdp_clk && mdp_pdata && mdp_pdata->mdp_core_clk_table) {
		min_clk_rate = clk_round_rate(mdp_clk, min_clk_rate);
		if (clk_set_rate(mdp_clk, min_clk_rate) < 0)
			printk(KERN_ERR "%s: clk_set_rate failed\n",
							 __func__);
		else {
			count = 0;
			current_rate = clk_get_rate(mdp_clk);
			while (count < mdp_pdata->num_mdp_clk) {
				if (mdp_pdata->mdp_core_clk_table[count]
						< current_rate) {
					mdp_pdata->
					mdp_core_clk_table[count] =
							current_rate;
				}
				count++;
			}
		}
	}
}
#endif

#ifdef CONFIG_MSM_BUS_SCALING
static uint32_t mdp_bus_scale_handle;
int mdp_bus_scale_update_request(uint32_t index)
{
	if (!mdp_pdata && (!mdp_pdata->mdp_bus_scale_table
	     || index > (mdp_pdata->mdp_bus_scale_table->num_usecases - 1))) {
		printk(KERN_ERR "%s invalid table or index\n", __func__);
		return -EINVAL;
	}
	if (mdp_bus_scale_handle < 1) {
		printk(KERN_ERR "%s invalid bus handle\n", __func__);
		return -EINVAL;
	}
	return msm_bus_scale_client_update_request(mdp_bus_scale_handle,
							index);
}
#endif
DEFINE_MUTEX(mdp_clk_lock);
int mdp_set_core_clk(uint16 perf_level)
{
	int ret = -EINVAL;
	if (mdp_clk && mdp_pdata
		 && mdp_pdata->mdp_core_clk_table) {
		if (perf_level > mdp_pdata->num_mdp_clk)
			printk(KERN_ERR "%s invalid perf level\n", __func__);
		else {
			mutex_lock(&mdp_clk_lock);
			ret = clk_set_rate(mdp_clk,
				mdp_pdata->
				mdp_core_clk_table[mdp_pdata->num_mdp_clk
						 - perf_level]);
			mutex_unlock(&mdp_clk_lock);
			if (ret) {
				printk(KERN_ERR "%s unable to set mdp_core_clk rate\n",
					__func__);
			}
		}
	}
	return ret;
}

unsigned long mdp_get_core_clk(void)
{
	unsigned long clk_rate = 0;
	if (mdp_clk) {
		mutex_lock(&mdp_clk_lock);
		clk_rate = clk_get_rate(mdp_clk);
		mutex_unlock(&mdp_clk_lock);
	}

	return clk_rate;
}

unsigned long mdp_perf_level2clk_rate(uint32 perf_level)
{
	unsigned long clk_rate = 0;

	if (mdp_pdata && mdp_pdata->mdp_core_clk_table) {
		if (perf_level > mdp_pdata->num_mdp_clk) {
			printk(KERN_ERR "%s invalid perf level\n", __func__);
			clk_rate = mdp_get_core_clk();
		} else {
			clk_rate = mdp_pdata->
				mdp_core_clk_table[mdp_pdata->num_mdp_clk
					- perf_level];
		}
	} else
		clk_rate = mdp_get_core_clk();

	return clk_rate;
}

static int mdp_irq_clk_setup(void)
{
	int ret;

#ifdef CONFIG_FB_MSM_MDP40
	ret = request_irq(mdp_irq, mdp4_isr, IRQF_DISABLED, "MDP", 0);
#else
	ret = request_irq(mdp_irq, mdp_isr, IRQF_DISABLED, "MDP", 0);
#endif
	if (ret) {
		printk(KERN_ERR "mdp request_irq() failed!\n");
		return ret;
	}
	disable_irq(mdp_irq);

	footswitch = regulator_get(NULL, "fs_mdp");
	if (IS_ERR(footswitch))
		footswitch = NULL;
	else {
		regulator_enable(footswitch);
		mdp_footswitch_on = 1;
	}

	mdp_clk = clk_get(NULL, "mdp_clk");
	if (IS_ERR(mdp_clk)) {
		ret = PTR_ERR(mdp_clk);
		printk(KERN_ERR "can't get mdp_clk error:%d!\n", ret);
		free_irq(mdp_irq, 0);
		return ret;
	}

	mdp_pclk = clk_get(NULL, "mdp_pclk");
	if (IS_ERR(mdp_pclk))
		mdp_pclk = NULL;

	if (mdp_rev == MDP_REV_42) {
		mdp_lut_clk = clk_get(NULL, "lut_mdp");
		if (IS_ERR(mdp_lut_clk)) {
			ret = PTR_ERR(mdp_lut_clk);
			pr_err("can't get mdp_clk error:%d!\n", ret);
			clk_put(mdp_clk);
			free_irq(mdp_irq, 0);
			return ret;
		}
	} else {
		mdp_lut_clk = NULL;
	}

#ifdef CONFIG_FB_MSM_MDP40
	/*
	 * mdp_clk should greater than mdp_pclk always
	 */
	if (mdp_pdata && mdp_pdata->mdp_core_clk_rate) {
		mutex_lock(&mdp_clk_lock);
		clk_set_rate(mdp_clk, mdp_pdata->mdp_core_clk_rate);
		if (mdp_lut_clk != NULL)
			clk_set_rate(mdp_lut_clk, mdp_pdata->mdp_core_clk_rate);
		mutex_unlock(&mdp_clk_lock);
	}
	MSM_FB_DEBUG("mdp_clk: mdp_clk=%d\n", (int)clk_get_rate(mdp_clk));
#endif
	return 0;
}

static int mdp_probe(struct platform_device *pdev)
{
	struct platform_device *msm_fb_dev = NULL;
	struct msm_fb_data_type *mfd;
	struct msm_fb_panel_data *pdata = NULL;
	int rc;
	resource_size_t  size ;
#ifdef CONFIG_FB_MSM_MDP40
	int intf, if_no;
#else
	unsigned long flag;
#endif
#if defined(CONFIG_FB_MSM_MIPI_DSI) && defined(CONFIG_FB_MSM_MDP40)
	struct mipi_panel_info *mipi;
#endif

	if ((pdev->id == 0) && (pdev->num_resources > 0)) {

		mdp_pdata = pdev->dev.platform_data;

		size =  resource_size(&pdev->resource[0]);
		msm_mdp_base = ioremap(pdev->resource[0].start, size);

		MSM_FB_DEBUG("MDP HW Base phy_Address = 0x%x virt = 0x%x\n",
			(int)pdev->resource[0].start, (int)msm_mdp_base);

		if (unlikely(!msm_mdp_base))
			return -ENOMEM;

		mdp_irq = platform_get_irq(pdev, 0);
		if (mdp_irq < 0) {
			pr_err("mdp: can not get mdp irq\n");
			return -ENOMEM;
		}

		mdp_rev = mdp_pdata->mdp_rev;
		rc = mdp_irq_clk_setup();

		if (rc)
			return rc;

		mdp_hw_version();

		/* initializing mdp hw */
#ifdef CONFIG_FB_MSM_MDP40
		mdp4_hw_init();
#else
		mdp_hw_init();
#endif

#ifdef CONFIG_FB_MSM_OVERLAY
		mdp_hw_cursor_init();
#endif

		mdp_resource_initialized = 1;

		if (!mdp_pdata)
			return 0;

		size = mdp_pdata->mdp_writeback_size_ov0 +
			mdp_pdata->mdp_writeback_size_ov1;
		if (size) {
			mdp_pdata->mdp_writeback_phys =
				(void *)allocate_contiguous_memory_nomap
				(size,
				 mdp_pdata->mdp_writeback_memtype,
				 4); /* align to word size */
			if (mdp_pdata->mdp_writeback_phys) {
				pr_info("allocating %d bytes at %p for mdp writeback\n",
					size, mdp_pdata->mdp_writeback_phys);
			} else {
				pr_err("%s cannot allocate memory for mdp writeback!\n",
				       __func__);
			}
		} else {
			mdp_pdata->mdp_writeback_phys = 0;
		}
		return 0;
	}

	if (!mdp_resource_initialized)
		return -EPERM;

	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;

	msm_fb_dev = platform_device_alloc("msm_fb", pdev->id);
	if (!msm_fb_dev)
		return -ENOMEM;

	/* link to the latest pdev */
	mfd->pdev = msm_fb_dev;
	mfd->mdp_rev = mdp_rev;

	mfd->ov0_blt_state  = 0;
	mfd->use_ov0_blt = 0 ;

	/* add panel data */
	if (platform_device_add_data
	    (msm_fb_dev, pdev->dev.platform_data,
	     sizeof(struct msm_fb_panel_data))) {
		printk(KERN_ERR "mdp_probe: platform_device_add_data failed!\n");
		rc = -ENOMEM;
		goto mdp_probe_err;
	}
	/* data chain */
	pdata = msm_fb_dev->dev.platform_data;
	pdata->on = mdp_on;
	pdata->off = mdp_off;
	pdata->next = pdev;

	mdp_prim_panel_type = mfd->panel.type;
	switch (mfd->panel.type) {
	case EXT_MDDI_PANEL:
	case MDDI_PANEL:
	case EBI2_PANEL:
		INIT_WORK(&mfd->dma_update_worker,
			  mdp_lcd_update_workqueue_handler);
		INIT_WORK(&mfd->vsync_resync_worker,
			  mdp_vsync_resync_workqueue_handler);
		mfd->hw_refresh = FALSE;

		if (mfd->panel.type == EXT_MDDI_PANEL) {
			/* 15 fps -> 66 msec */
			mfd->refresh_timer_duration = (66 * HZ / 1000);
		} else {
			/* 24 fps -> 42 msec */
			mfd->refresh_timer_duration = (42 * HZ / 1000);
		}

#ifdef CONFIG_FB_MSM_MDP22
		mfd->dma_fnc = mdp_dma2_update;
		mfd->dma = &dma2_data;
#else
		if (mfd->panel_info.pdest == DISPLAY_1) {
#if defined(CONFIG_FB_MSM_OVERLAY) && defined(CONFIG_FB_MSM_MDDI)
			mfd->dma_fnc = mdp4_mddi_overlay;
			mfd->cursor_update = mdp4_mddi_overlay_cursor;
#else
			mfd->dma_fnc = mdp_dma2_update;
#endif
			mfd->dma = &dma2_data;
			mfd->lut_update = mdp_lut_update_nonlcdc;
			mfd->do_histogram = mdp_do_histogram;
		} else {
			mfd->dma_fnc = mdp_dma_s_update;
			mfd->dma = &dma_s_data;
		}
#endif
		if (mdp_pdata)
			mfd->vsync_gpio = mdp_pdata->gpio;
		else
			mfd->vsync_gpio = -1;

#ifdef CONFIG_FB_MSM_MDP40
		if (mfd->panel.type == EBI2_PANEL)
			intf = EBI2_INTF;
		else
			intf = MDDI_INTF;

		if (mfd->panel_info.pdest == DISPLAY_1)
			if_no = PRIMARY_INTF_SEL;
		else
			if_no = SECONDARY_INTF_SEL;

		mdp4_display_intf_sel(if_no, intf);
#endif
		mdp_config_vsync(mfd);
		break;

#ifdef CONFIG_FB_MSM_MIPI_DSI
	case MIPI_VIDEO_PANEL:
#ifndef CONFIG_FB_MSM_MDP303
		pdata->on = mdp4_dsi_video_on;
		pdata->off = mdp4_dsi_video_off;
		mfd->hw_refresh = TRUE;
		mfd->dma_fnc = mdp4_dsi_video_overlay;
		mfd->lut_update = mdp_lut_update_lcdc;
		mfd->do_histogram = mdp_do_histogram;
		if (mfd->panel_info.pdest == DISPLAY_1) {
			if_no = PRIMARY_INTF_SEL;
			mfd->dma = &dma2_data;
		} else {
			if_no = EXTERNAL_INTF_SEL;
			mfd->dma = &dma_e_data;
		}
		mdp4_display_intf_sel(if_no, DSI_VIDEO_INTF);
#else
		pdata->on = mdp_dsi_video_on;
		pdata->off = mdp_dsi_video_off;
		mfd->hw_refresh = TRUE;
		mfd->dma_fnc = mdp_dsi_video_update;
		mfd->do_histogram = mdp_do_histogram;
		if (mfd->panel_info.pdest == DISPLAY_1)
			mfd->dma = &dma2_data;
		else {
			printk(KERN_ERR "Invalid Selection of destination panel\n");
			rc = -ENODEV;
			goto mdp_probe_err;
		}

#endif
		if (mdp_rev >= MDP_REV_40)
			mfd->cursor_update = mdp_hw_cursor_sync_update;
		else
			mfd->cursor_update = mdp_hw_cursor_update;
		break;

	case MIPI_CMD_PANEL:
#ifndef CONFIG_FB_MSM_MDP303
		mfd->dma_fnc = mdp4_dsi_cmd_overlay;
#ifdef CONFIG_FB_MSM_MDP40
		mipi = &mfd->panel_info.mipi;
		configure_mdp_core_clk_table((mipi->dsi_pclk_rate) * 3 / 2);
#endif
		if (mfd->panel_info.pdest == DISPLAY_1) {
			if_no = PRIMARY_INTF_SEL;
			mfd->dma = &dma2_data;
		} else {
			if_no = SECONDARY_INTF_SEL;
			mfd->dma = &dma_s_data;
		}
		mfd->lut_update = mdp_lut_update_nonlcdc;
		mfd->do_histogram = mdp_do_histogram;
		mdp4_display_intf_sel(if_no, DSI_CMD_INTF);
#else
		mfd->dma_fnc = mdp_dma2_update;
		mfd->do_histogram = mdp_do_histogram;
		if (mfd->panel_info.pdest == DISPLAY_1)
			mfd->dma = &dma2_data;
		else {
			printk(KERN_ERR "Invalid Selection of destination panel\n");
			rc = -ENODEV;
			goto mdp_probe_err;
		}
#endif
		mdp_config_vsync(mfd);
		break;
#endif

#ifdef CONFIG_FB_MSM_DTV
	case DTV_PANEL:
		pdata->on = mdp4_dtv_on;
		pdata->off = mdp4_dtv_off;
		mfd->hw_refresh = TRUE;
		mfd->cursor_update = mdp_hw_cursor_update;
		mfd->dma_fnc = mdp4_dtv_overlay;
		mfd->dma = &dma_e_data;
		mdp4_display_intf_sel(EXTERNAL_INTF_SEL, DTV_INTF);
		break;
#endif
	case HDMI_PANEL:
	case LCDC_PANEL:
		pdata->on = mdp_lcdc_on;
		pdata->off = mdp_lcdc_off;
		mfd->hw_refresh = TRUE;
#if	defined(CONFIG_FB_MSM_OVERLAY) && defined(CONFIG_FB_MSM_MDP40)
		mfd->cursor_update = mdp_hw_cursor_sync_update;
#else
		mfd->cursor_update = mdp_hw_cursor_update;
#endif
#ifndef CONFIG_FB_MSM_MDP22
		mfd->lut_update = mdp_lut_update_lcdc;
		mfd->do_histogram = mdp_do_histogram;
#endif
#ifdef CONFIG_FB_MSM_OVERLAY
		mfd->dma_fnc = mdp4_lcdc_overlay;
#else
		mfd->dma_fnc = mdp_lcdc_update;
#endif

#ifdef CONFIG_FB_MSM_MDP40
		configure_mdp_core_clk_table((mfd->panel_info.clk_rate)
								* 23 / 20);
		if (mfd->panel.type == HDMI_PANEL) {
			mfd->dma = &dma_e_data;
			mdp4_display_intf_sel(EXTERNAL_INTF_SEL, LCDC_RGB_INTF);
		} else {
			mfd->dma = &dma2_data;
			mdp4_display_intf_sel(PRIMARY_INTF_SEL, LCDC_RGB_INTF);
		}
#else
		mfd->dma = &dma2_data;
		spin_lock_irqsave(&mdp_spin_lock, flag);
		mdp_intr_mask &= ~MDP_DMA_P_DONE;
		outp32(MDP_INTR_ENABLE, mdp_intr_mask);
		spin_unlock_irqrestore(&mdp_spin_lock, flag);
#endif
		break;

	case TV_PANEL:
#if defined(CONFIG_FB_MSM_OVERLAY) && defined(CONFIG_FB_MSM_TVOUT)
		pdata->on = mdp4_atv_on;
		pdata->off = mdp4_atv_off;
		mfd->dma_fnc = mdp4_atv_overlay;
		mfd->dma = &dma_e_data;
		mdp4_display_intf_sel(EXTERNAL_INTF_SEL, TV_INTF);
#else
		pdata->on = mdp_dma3_on;
		pdata->off = mdp_dma3_off;
		mfd->hw_refresh = TRUE;
		mfd->dma_fnc = mdp_dma3_update;
		mfd->dma = &dma3_data;
#endif
		break;

#ifdef CONFIG_FB_MSM_WRITEBACK_MSM_PANEL
	case WRITEBACK_PANEL:
		pdata->on = mdp4_overlay_writeback_on;
		pdata->off = mdp4_overlay_writeback_off;
		mfd->dma_fnc = mdp4_writeback_overlay;
		mfd->dma = &dma_e_data;
		mdp4_display_intf_sel(EXTERNAL_INTF_SEL, DTV_INTF);
		break;
#endif
	default:
		printk(KERN_ERR "mdp_probe: unknown device type!\n");
		rc = -ENODEV;
		goto mdp_probe_err;
	}
#ifdef CONFIG_FB_MSM_MDP40
	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
	mdp4_display_intf = inpdw(MDP_BASE + 0x0038);
	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);
#endif

#ifdef CONFIG_MSM_BUS_SCALING
	if (!mdp_bus_scale_handle && mdp_pdata &&
		mdp_pdata->mdp_bus_scale_table) {
		mdp_bus_scale_handle =
			msm_bus_scale_register_client(
					mdp_pdata->mdp_bus_scale_table);
		if (!mdp_bus_scale_handle) {
			printk(KERN_ERR "%s not able to get bus scale\n",
				__func__);
			return -ENOMEM;
		}
	}
#endif

	if (mdp_pdata && mdp_pdata->mdp_writeback_phys) {
		mfd->writeback_overlay0_phys =
			(mdp_pdata->mdp_writeback_size_ov0) ?
			mdp_pdata->mdp_writeback_phys : 0;
		mfd->writeback_overlay1_phys =
			(mdp_pdata->mdp_writeback_size_ov1) ?
			(mdp_pdata->mdp_writeback_phys +
			 mdp_pdata->mdp_writeback_size_ov0) : 0;
	} else {
		mfd->writeback_overlay0_phys = 0;
		mfd->writeback_overlay1_phys = 0;
	}

	/* set driver data */
	platform_set_drvdata(msm_fb_dev, mfd);

	rc = platform_device_add(msm_fb_dev);
	if (rc) {
		goto mdp_probe_err;
	}

	pm_runtime_set_active(&pdev->dev);
	pm_runtime_enable(&pdev->dev);

	pdev_list[pdev_list_cnt++] = pdev;
	mdp4_extn_disp = 0;
	return 0;

      mdp_probe_err:
	platform_device_put(msm_fb_dev);
#ifdef CONFIG_MSM_BUS_SCALING
	if (mdp_pdata && mdp_pdata->mdp_bus_scale_table &&
		mdp_bus_scale_handle > 0)
		msm_bus_scale_unregister_client(mdp_bus_scale_handle);
#endif
	return rc;
}

void mdp_footswitch_ctrl(boolean on)
{
	mutex_lock(&mdp_suspend_mutex);
	if (!mdp_suspended || mdp4_extn_disp || !footswitch ||
		mdp_rev <= MDP_REV_41) {
		mutex_unlock(&mdp_suspend_mutex);
		return;
	}

	if (on && !mdp_footswitch_on) {
		pr_debug("Enable MDP FS\n");
		regulator_enable(footswitch);
		mdp_footswitch_on = 1;
	} else if (!on && mdp_footswitch_on) {
		pr_debug("Disable MDP FS\n");
		regulator_disable(footswitch);
		mdp_footswitch_on = 0;
	}

	mutex_unlock(&mdp_suspend_mutex);
}

#ifdef CONFIG_PM
static void mdp_suspend_sub(void)
{
	/* cancel pipe ctrl worker */
	cancel_delayed_work(&mdp_pipe_ctrl_worker);

	/* for workder can't be cancelled... */
	flush_workqueue(mdp_pipe_ctrl_wq);

	/* let's wait for PPP completion */
	while (atomic_read(&mdp_block_power_cnt[MDP_PPP_BLOCK]) > 0)
		cpu_relax();

	/* try to power down */
	mdp_pipe_ctrl(MDP_MASTER_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);

	mutex_lock(&mdp_suspend_mutex);
	mdp_suspended = TRUE;
	mutex_unlock(&mdp_suspend_mutex);
}
#endif

#if defined(CONFIG_PM) && !defined(CONFIG_HAS_EARLYSUSPEND)
static int mdp_suspend(struct platform_device *pdev, pm_message_t state)
{
	if (pdev->id == 0) {
		mdp_suspend_sub();
		if (mdp_current_clk_on) {
			printk(KERN_WARNING"MDP suspend failed\n");
			return -EBUSY;
		}
	}

	return 0;
}
#endif

#ifdef CONFIG_HAS_EARLYSUSPEND
static void mdp_early_suspend(struct early_suspend *h)
{
	mdp_suspend_sub();
#ifdef CONFIG_FB_MSM_DTV
	mdp4_dtv_set_black_screen();
#endif
	mdp_footswitch_ctrl(FALSE);
}

static void mdp_early_resume(struct early_suspend *h)
{
	mdp_footswitch_ctrl(TRUE);
	mutex_lock(&mdp_suspend_mutex);
	mdp_suspended = FALSE;
	mutex_unlock(&mdp_suspend_mutex);
}
#endif

static int mdp_remove(struct platform_device *pdev)
{
	if (footswitch != NULL)
		regulator_put(footswitch);
	iounmap(msm_mdp_base);
	pm_runtime_disable(&pdev->dev);
#ifdef CONFIG_MSM_BUS_SCALING
	if (mdp_pdata && mdp_pdata->mdp_bus_scale_table &&
		mdp_bus_scale_handle > 0)
		msm_bus_scale_unregister_client(mdp_bus_scale_handle);
#endif
	return 0;
}

static int mdp_register_driver(void)
{
#ifdef CONFIG_HAS_EARLYSUSPEND
	early_suspend.level = EARLY_SUSPEND_LEVEL_DISABLE_FB - 1;
	early_suspend.suspend = mdp_early_suspend;
	early_suspend.resume = mdp_early_resume;
	register_early_suspend(&early_suspend);
#endif

	return platform_driver_register(&mdp_driver);
}

static int __init mdp_driver_init(void)
{
	int ret;

	mdp_drv_init();

	ret = mdp_register_driver();
	if (ret) {
		printk(KERN_ERR "mdp_register_driver() failed!\n");
		return ret;
	}

#if defined(CONFIG_DEBUG_FS)
	mdp_debugfs_init();
#endif

	return 0;

}

module_init(mdp_driver_init);