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mdp.c

/* Copyright (c) 2008-2009, 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#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 <asm/system.h>
#include <asm/mach-types.h>
#include <linux/semaphore.h>
#include <linux/uaccess.h>

#include "mdp.h"
#include "msm_fb.h"
#ifdef CONFIG_FB_MSM_MDP40
#include "mdp4.h"
#endif

static struct clk *mdp_clk;
static struct clk *mdp_pclk;

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

unsigned long mdp_timer_duration = (HZ);   /* 1 sec */
/* unsigned long mdp_mdp_timer_duration=0; */

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];

int32 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;

#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;
#else
static struct mdp_dma_data dma2_data;
static struct mdp_dma_data dma_s_data;
static struct mdp_dma_data dma_e_data;
#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 mdp_lcdc_pclk_clk_rate;
extern int mdp_lcdc_pad_pclk_clk_rate;
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

#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;
}

#define MDP_HIST_MAX_BIN 32
static __u32 mdp_hist_r[MDP_HIST_MAX_BIN];
static __u32 mdp_hist_g[MDP_HIST_MAX_BIN];
static __u32 mdp_hist_b[MDP_HIST_MAX_BIN];

#ifdef CONFIG_FB_MSM_MDP40
struct mdp_histogram mdp_hist;
struct completion mdp_hist_comp;
#else
static struct mdp_histogram mdp_hist;
static struct completion mdp_hist_comp;
#endif

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

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

      INIT_COMPLETION(mdp_hist_comp);

      mdp_hist.bin_cnt = hist->bin_cnt;
      mdp_hist.r = (hist->r) ? mdp_hist_r : 0;
      mdp_hist.g = (hist->g) ? mdp_hist_g : 0;
      mdp_hist.b = (hist->b) ? mdp_hist_b : 0;

#ifdef CONFIG_FB_MSM_MDP40
      MDP_OUTP(MDP_BASE + 0x95004, hist->frame_cnt);
      MDP_OUTP(MDP_BASE + 0x95000, 1);
#else
      MDP_OUTP(MDP_BASE + 0x94004, hist->frame_cnt);
      MDP_OUTP(MDP_BASE + 0x94000, 1);
#endif
      wait_for_completion_killable(&mdp_hist_comp);

      if (hist->r) {
            ret = copy_to_user(hist->r, mdp_hist.r, hist->bin_cnt*4);
            if (ret)
                  goto hist_err;
      }
      if (hist->g) {
            ret = copy_to_user(hist->g, mdp_hist.g, hist->bin_cnt*4);
            if (ret)
                  goto hist_err;
      }
      if (hist->b) {
            ret = copy_to_user(hist->b, mdp_hist.b, hist->bin_cnt*4);
            if (ret)
                  goto hist_err;
      }
      return 0;

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

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 "MDP IRQ term-0x%x is already set\n", term);
      } else {
            mdp_irq_mask |= term;
            if (mdp_irq_mask && !mdp_irq_enabled) {
                  mdp_irq_enabled = 1;
                  enable_irq(INT_MDP);
            }
      }
      spin_unlock_irqrestore(&mdp_lock, irq_flags);
}

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 "MDP IRQ term-0x%x is not set\n", term);
      } else {
            mdp_irq_mask &= ~term;
            if (!mdp_irq_mask && mdp_irq_enabled) {
                  mdp_irq_enabled = 0;
                  disable_irq(INT_MDP);
            }
      }
      spin_unlock_irqrestore(&mdp_lock, irq_flags);
}

void mdp_disable_irq_nolock(uint32 term)
{

      if (!(mdp_irq_mask & term)) {
            printk(KERN_ERR "MDP IRQ term-0x%x is not set\n", term);
      } else {
            mdp_irq_mask &= ~term;
            if (!mdp_irq_mask && mdp_irq_enabled) {
                  mdp_irq_enabled = 0;
                  disable_irq(INT_MDP);
            }
      }
}

void mdp_pipe_kickoff(uint32 term, struct msm_fb_data_type *mfd)
{

      dmb();      /* memory barrier */

      /* 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_INFO("MDP-PPP: %d\n",
                            (int)mdp_ppp_timeval.tv_usec);
            }
      } else if (term == MDP_DMA2_TERM) {
            if (mdp_debug[MDP_DMA2_BLOCK]) {
                  MSM_FB_INFO("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
            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);
            }
#ifdef CONFIG_FB_MSM_MDP40
            outpdw(MDP_BASE + 0x000c, 0x0);     /* start DMA */
#else
            outpdw(MDP_BASE + 0x0044, 0x0);     /* start DMA */
#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);
            outpdw(MDP_BASE + 0x0004, 0);
      } else if (term == MDP_OVERLAY1_TERM) {
            mdp_pipe_ctrl(MDP_OVERLAY1_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
            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 */
      }
#endif
}

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;

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

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

            if (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);
                  }
                  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) {
            /* checking all blocks power state */
            for (i = 0; i < MDP_MAX_BLOCK; i++) {
                  if (mdp_block_power_cnt[i] > 0)
                        mdp_all_blocks_off = FALSE;
            }

            if ((mdp_all_blocks_off) && (mdp_current_clk_on)) {
                  /* 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 (mdp_block_power_cnt[i] > 0)
                        mdp_all_blocks_off = FALSE;
            }

            /*
             * 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)) {
                  if (block == MDP_MASTER_BLOCK) {
                        mdp_current_clk_on = FALSE;
                        /* turn off MDP clks */
                        if (mdp_clk != NULL) {
                              clk_disable(mdp_clk);
                              MSM_FB_DEBUG("MDP CLK OFF\n");
                        }
                        if (mdp_pclk != NULL) {
                              clk_disable(mdp_pclk);
                              MSM_FB_DEBUG("MDP PCLK OFF\n");
                        }
                  } else {
                        /* send workqueue to turn off mdp power */
                        queue_delayed_work(mdp_pipe_ctrl_wq,
                                       &mdp_pipe_ctrl_worker,
                                       mdp_timer_duration);
                  }
            } else if ((!mdp_all_blocks_off) && (!mdp_current_clk_on)) {
                  mdp_current_clk_on = TRUE;
                  /* turn on MDP clks */
                  if (mdp_clk != NULL) {
                        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");
                  }
            }
            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);
                  if (mdp_hist.r)
                        memcpy(mdp_hist.r, MDP_BASE + 0x94100,
                                    mdp_hist.bin_cnt*4);
                  if (mdp_hist.g)
                        memcpy(mdp_hist.g, MDP_BASE + 0x94200,
                                    mdp_hist.bin_cnt*4);
                  if (mdp_hist.b)
                        memcpy(mdp_hist.b, MDP_BASE + 0x94300,
                                    mdp_hist.bin_cnt*4);
                  complete(&mdp_hist_comp);
            }

            /* LCDC UnderFlow */
            if (mdp_interrupt & LCDC_UNDERFLOW) {
                  mdp_lcdc_underflow_cnt++;
            }
            /* 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);
            }
#endif

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

                  now_k = ktime_get_real();
                  mdp_dma2_last_update_time.tv.sec =
                      now_k.tv.sec - mdp_dma2_last_update_time.tv.sec;
                  mdp_dma2_last_update_time.tv.nsec =
                      now_k.tv.nsec - mdp_dma2_last_update_time.tv.nsec;

                  if (mdp_debug[MDP_DMA2_BLOCK]) {
                        jiffies_to_timeval(jiffies, &now);
                        mdp_dma2_timeval.tv_usec =
                            now.tv_usec - mdp_dma2_timeval.tv_usec;
                  }

                  dma = &dma2_data;
                  dma->busy = FALSE;
                  mdp_pipe_ctrl(MDP_DMA2_BLOCK, MDP_BLOCK_POWER_OFF,
                              TRUE);
                  complete(&dma->comp);
            }
            /* PPP Complete */
            if (mdp_interrupt & MDP_PPP_DONE) {
                  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);
      init_MUTEX(&mdp_ppp_mutex);
      init_MUTEX(&mdp_pipe_ctrl_mutex);

      dma2_data.busy = FALSE;
      dma2_data.waiting = FALSE;
      init_completion(&dma2_data.comp);
      init_MUTEX(&dma2_data.mutex);
      mutex_init(&dma2_data.ov_mutex);

      dma3_data.busy = FALSE;
      dma3_data.waiting = FALSE;
      init_completion(&dma3_data.comp);
      init_MUTEX(&dma3_data.mutex);

      dma_s_data.busy = FALSE;
      dma_s_data.waiting = FALSE;
      init_completion(&dma_s_data.comp);
      init_MUTEX(&dma_s_data.mutex);

      dma_e_data.busy = FALSE;
      dma_e_data.waiting = FALSE;
      init_completion(&dma_e_data.comp);

#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++) {
            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);
                        msm_fb_debugfs_file_create(mdp_dir,
                              "mdp_lcdc_pclk_clk_rate",
                              (u32 *) &mdp_lcdc_pclk_clk_rate);
                        msm_fb_debugfs_file_create(mdp_dir,
                              "mdp_lcdc_pad_pclk_clk_rate",
                              (u32 *) &mdp_lcdc_pad_pclk_clk_rate);
#endif
                  }
            }
      }
#endif
}

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

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

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

#ifdef MDP_HW_VSYNC
      struct msm_fb_data_type *mfd = platform_get_drvdata(pdev);
#endif

      ret = panel_next_off(pdev);

#ifdef MDP_HW_VSYNC
      mdp_hw_vsync_clk_disable(mfd);
#endif

      return ret;
}

static int mdp_on(struct platform_device *pdev)
{
#ifdef MDP_HW_VSYNC
      struct msm_fb_data_type *mfd = platform_get_drvdata(pdev);
#endif

      int ret = 0;

#ifdef MDP_HW_VSYNC
      mdp_hw_vsync_clk_enable(mfd);
#endif

      ret = panel_next_on(pdev);

      return ret;
}

static int mdp_irq_clk_setup(void)
{
      int ret;

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

      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(INT_MDP, 0);
            return ret;
      }

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

#ifdef CONFIG_FB_MSM_MDP40
      /*
       * mdp_clk should greater than mdp_pclk always
       */
      clk_set_rate(mdp_clk, 122880000); /* 122.88 Mhz */
      printk(KERN_INFO "mdp_clk: mdp_clk=%d mdp_pclk=%d\n",
            (int)clk_get_rate(mdp_clk), (int)clk_get_rate(mdp_pclk));
#endif

      return 0;
}

static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
static int pdev_list_cnt;
static int mdp_resource_initialized;
static struct msm_panel_common_pdata *mdp_pdata;

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 ((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_INFO("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;

            rc = mdp_irq_clk_setup();

            if (rc)
                  return rc;

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

            mdp_resource_initialized = 1;
            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;

      /* 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;

      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) {
#ifdef CONFIG_FB_MSM_OVERLAY
                  mfd->dma_fnc = mdp4_mddi_overlay;
#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;

      case HDMI_PANEL:
      case LCDC_PANEL:
            pdata->on = mdp_lcdc_on;
            pdata->off = mdp_lcdc_off;
            mfd->hw_refresh = TRUE;
            mfd->cursor_update = mdp_hw_cursor_update;
#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
            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:
            pdata->on = mdp_dma3_on;
            pdata->off = mdp_dma3_off;
            mfd->hw_refresh = TRUE;
            mfd->dma_fnc = mdp_dma3_update;
            mfd->dma = &dma3_data;
            break;

      default:
            printk(KERN_ERR "mdp_probe: unknown device type!\n");
            rc = -ENODEV;
            goto mdp_probe_err;
      }

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

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

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

      mdp_probe_err:
      platform_device_put(msm_fb_dev);
      return rc;
}

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 (mdp_block_power_cnt[MDP_PPP_BLOCK] > 0) ;

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

#if defined(CONFIG_PM) && !defined(CONFIG_HAS_EARLYSUSPEND)
static int mdp_suspend(struct platform_device *pdev, pm_message_t state)
{
      mdp_suspend_sub();
      return 0;
}
#endif

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

static int mdp_remove(struct platform_device *pdev)
{
      iounmap(msm_mdp_base);
      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;
      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) && defined(CONFIG_FB_MSM_MDP40)
      mdp4_debugfs_init();
#endif

      return 0;

}

module_init(mdp_driver_init);

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