text: /*
   * omap_vout.c
   *
   * Copyright (C) 2005-2010 Texas Instruments.
   *
   * This file is licensed under the terms of the GNU General Public License
   * version 2. This program is licensed "as is" without any warranty of any
   * kind, whether express or implied.
   *
   * Leveraged code from the OMAP2 camera driver
   * Video-for-Linux (Version 2) camera capture driver for
   * the OMAP24xx camera controller.
   *
   * Author: Andy Lowe (source@mvista.com)
   *
   * Copyright (C) 2004 MontaVista Software, Inc.
   * Copyright (C) 2010 Texas Instruments.
   *
   * History:
   * 20-APR-2006 Khasim		Modified VRFB based Rotation,
   *				The image data is always read from 0 degree
   *				view and written
   *				to the virtual space of desired rotation angle
   * 4-DEC-2006  Jian		Changed to support better memory management
   *
   * 17-Nov-2008 Hardik		Changed driver to use video_ioctl2
   *
   * 23-Feb-2010 Vaibhav H	Modified to use new DSS2 interface
   *
   */
  
  #include <linux/init.h>
  #include <linux/module.h>
  #include <linux/vmalloc.h>
  #include <linux/sched.h>
  #include <linux/types.h>
  #include <linux/platform_device.h>
  #include <linux/irq.h>
  #include <linux/videodev2.h>
  #include <linux/dma-mapping.h>
  #include <linux/slab.h>
  
  #include <media/videobuf-dma-contig.h>
  #include <media/v4l2-device.h>
  #include <media/v4l2-ioctl.h>
  
  #include <plat/dma.h>
  #include <plat/vrfb.h>
  #include <video/omapdss.h>
  
  #include "omap_voutlib.h"
  #include "omap_voutdef.h"
  #include "omap_vout_vrfb.h"
  
  MODULE_AUTHOR("Texas Instruments");
  MODULE_DESCRIPTION("OMAP Video for Linux Video out driver");
  MODULE_LICENSE("GPL");
  
  /* Driver Configuration macros */
  #define VOUT_NAME		"omap_vout"
  
  enum omap_vout_channels {
  	OMAP_VIDEO1,
  	OMAP_VIDEO2,
  };
  
  static struct videobuf_queue_ops video_vbq_ops;
  /* Variables configurable through module params*/
  static u32 video1_numbuffers = 3;
  static u32 video2_numbuffers = 3;
  static u32 video1_bufsize = OMAP_VOUT_MAX_BUF_SIZE;
  static u32 video2_bufsize = OMAP_VOUT_MAX_BUF_SIZE;
  static bool vid1_static_vrfb_alloc;
  static bool vid2_static_vrfb_alloc;
  static bool debug;
  
  /* Module parameters */
  module_param(video1_numbuffers, uint, S_IRUGO);
  MODULE_PARM_DESC(video1_numbuffers,
  	"Number of buffers to be allocated at init time for Video1 device.");
  
  module_param(video2_numbuffers, uint, S_IRUGO);
  MODULE_PARM_DESC(video2_numbuffers,
  	"Number of buffers to be allocated at init time for Video2 device.");
  
  module_param(video1_bufsize, uint, S_IRUGO);
  MODULE_PARM_DESC(video1_bufsize,
  	"Size of the buffer to be allocated for video1 device");
  
  module_param(video2_bufsize, uint, S_IRUGO);
  MODULE_PARM_DESC(video2_bufsize,
  	"Size of the buffer to be allocated for video2 device");
  
  module_param(vid1_static_vrfb_alloc, bool, S_IRUGO);
  MODULE_PARM_DESC(vid1_static_vrfb_alloc,
  	"Static allocation of the VRFB buffer for video1 device");
  
  module_param(vid2_static_vrfb_alloc, bool, S_IRUGO);
  MODULE_PARM_DESC(vid2_static_vrfb_alloc,
  	"Static allocation of the VRFB buffer for video2 device");
  
  module_param(debug, bool, S_IRUGO);
  MODULE_PARM_DESC(debug, "Debug level (0-1)");
  
  /* list of image formats supported by OMAP2 video pipelines */
  static const struct v4l2_fmtdesc omap_formats[] = {
  	{
  		/* Note:  V4L2 defines RGB565 as:
  		 *
  		 *      Byte 0                    Byte 1
  		 *      g2 g1 g0 r4 r3 r2 r1 r0   b4 b3 b2 b1 b0 g5 g4 g3
  		 *
  		 * We interpret RGB565 as:
  		 *
  		 *      Byte 0                    Byte 1
  		 *      g2 g1 g0 b4 b3 b2 b1 b0   r4 r3 r2 r1 r0 g5 g4 g3
  		 */
  		.description = "RGB565, le",
  		.pixelformat = V4L2_PIX_FMT_RGB565,
  	},
  	{
  		/* Note:  V4L2 defines RGB32 as: RGB-8-8-8-8  we use
  		 *  this for RGB24 unpack mode, the last 8 bits are ignored
  		 * */
  		.description = "RGB32, le",
  		.pixelformat = V4L2_PIX_FMT_RGB32,
  	},
  	{
  		/* Note:  V4L2 defines RGB24 as: RGB-8-8-8  we use
  		 *        this for RGB24 packed mode
  		 *
  		 */
  		.description = "RGB24, le",
  		.pixelformat = V4L2_PIX_FMT_RGB24,
  	},
  	{
  		.description = "YUYV (YUV 4:2:2), packed",
  		.pixelformat = V4L2_PIX_FMT_YUYV,
  	},
  	{
  		.description = "UYVY, packed",
  		.pixelformat = V4L2_PIX_FMT_UYVY,
  	},
  };
  
  #define NUM_OUTPUT_FORMATS (ARRAY_SIZE(omap_formats))
  
  /*
   * Try format
   */
  static int omap_vout_try_format(struct v4l2_pix_format *pix)
  {
  	int ifmt, bpp = 0;
  
  	pix->height = clamp(pix->height, (u32)VID_MIN_HEIGHT,
  						(u32)VID_MAX_HEIGHT);
  	pix->width = clamp(pix->width, (u32)VID_MIN_WIDTH, (u32)VID_MAX_WIDTH);
  
  	for (ifmt = 0; ifmt < NUM_OUTPUT_FORMATS; ifmt++) {
  		if (pix->pixelformat == omap_formats[ifmt].pixelformat)
  			break;
  	}
  
  	if (ifmt == NUM_OUTPUT_FORMATS)
  		ifmt = 0;
  
  	pix->pixelformat = omap_formats[ifmt].pixelformat;
  	pix->field = V4L2_FIELD_ANY;
  	pix->priv = 0;
  
  	switch (pix->pixelformat) {
  	case V4L2_PIX_FMT_YUYV:
  	case V4L2_PIX_FMT_UYVY:
  	default:
  		pix->colorspace = V4L2_COLORSPACE_JPEG;
  		bpp = YUYV_BPP;
  		break;
  	case V4L2_PIX_FMT_RGB565:
  	case V4L2_PIX_FMT_RGB565X:
  		pix->colorspace = V4L2_COLORSPACE_SRGB;
  		bpp = RGB565_BPP;
  		break;
  	case V4L2_PIX_FMT_RGB24:
  		pix->colorspace = V4L2_COLORSPACE_SRGB;
  		bpp = RGB24_BPP;
  		break;
  	case V4L2_PIX_FMT_RGB32:
  	case V4L2_PIX_FMT_BGR32:
  		pix->colorspace = V4L2_COLORSPACE_SRGB;
  		bpp = RGB32_BPP;
  		break;
  	}
  	pix->bytesperline = pix->width * bpp;
  	pix->sizeimage = pix->bytesperline * pix->height;
  
  	return bpp;
  }
  
  /*
   * omap_vout_uservirt_to_phys: This inline function is used to convert user
   * space virtual address to physical address.
   */
  static u32 omap_vout_uservirt_to_phys(u32 virtp)
  {
  	unsigned long physp = 0;
  	struct vm_area_struct *vma;
  	struct mm_struct *mm = current->mm;
  
  	/* For kernel direct-mapped memory, take the easy way */
  	if (virtp >= PAGE_OFFSET)
  		return virt_to_phys((void *) virtp);
  
  	down_read(&current->mm->mmap_sem);
  	vma = find_vma(mm, virtp);
  	if (vma && (vma->vm_flags & VM_IO) && vma->vm_pgoff) {
  		/* this will catch, kernel-allocated, mmaped-to-usermode
  		   addresses */
  		physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start);
  		up_read(&current->mm->mmap_sem);
  	} else {
  		/* otherwise, use get_user_pages() for general userland pages */
  		int res, nr_pages = 1;
  		struct page *pages;
  
  		res = get_user_pages(current, current->mm, virtp, nr_pages, 1,
  				0, &pages, NULL);
  		up_read(&current->mm->mmap_sem);
  
  		if (res == nr_pages) {
  			physp =  __pa(page_address(&pages[0]) +
  					(virtp & ~PAGE_MASK));
  		} else {
  			printk(KERN_WARNING VOUT_NAME
  					"get_user_pages failed\n");
  			return 0;
  		}
  	}
  
  	return physp;
  }
  
  /*
   * Free the V4L2 buffers
   */
  void omap_vout_free_buffers(struct omap_vout_device *vout)
  {
  	int i, numbuffers;
  
  	/* Allocate memory for the buffers */
  	numbuffers = (vout->vid) ?  video2_numbuffers : video1_numbuffers;
  	vout->buffer_size = (vout->vid) ? video2_bufsize : video1_bufsize;
  
  	for (i = 0; i < numbuffers; i++) {
  		omap_vout_free_buffer(vout->buf_virt_addr[i],
  				vout->buffer_size);
  		vout->buf_phy_addr[i] = 0;
  		vout->buf_virt_addr[i] = 0;
  	}
  }
  
  /*
   * Convert V4L2 rotation to DSS rotation
   *	V4L2 understand 0, 90, 180, 270.
   *	Convert to 0, 1, 2 and 3 respectively for DSS
   */
  static int v4l2_rot_to_dss_rot(int v4l2_rotation,
  			enum dss_rotation *rotation, bool mirror)
  {
  	int ret = 0;
  
  	switch (v4l2_rotation) {
  	case 90:
  		*rotation = dss_rotation_90_degree;
  		break;
  	case 180:
  		*rotation = dss_rotation_180_degree;
  		break;
  	case 270:
  		*rotation = dss_rotation_270_degree;
  		break;
  	case 0:
  		*rotation = dss_rotation_0_degree;
  		break;
  	default:
  		ret = -EINVAL;
  	}
  	return ret;
  }
  
  static int omap_vout_calculate_offset(struct omap_vout_device *vout)
  {
  	struct omapvideo_info *ovid;
  	struct v4l2_rect *crop = &vout->crop;
  	struct v4l2_pix_format *pix = &vout->pix;
  	int *cropped_offset = &vout->cropped_offset;
  	int ps = 2, line_length = 0;
  
  	ovid = &vout->vid_info;
  
  	if (ovid->rotation_type == VOUT_ROT_VRFB) {
  		omap_vout_calculate_vrfb_offset(vout);
  	} else {
  		vout->line_length = line_length = pix->width;
  
  		if (V4L2_PIX_FMT_YUYV == pix->pixelformat ||
  			V4L2_PIX_FMT_UYVY == pix->pixelformat)
  			ps = 2;
  		else if (V4L2_PIX_FMT_RGB32 == pix->pixelformat)
  			ps = 4;
  		else if (V4L2_PIX_FMT_RGB24 == pix->pixelformat)
  			ps = 3;
  
  		vout->ps = ps;
  
  		*cropped_offset = (line_length * ps) *
  			crop->top + crop->left * ps;
  	}
  
  	v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev, "%s Offset:%x\n",
  			__func__, vout->cropped_offset);
  
  	return 0;
  }
  
  /*
   * Convert V4L2 pixel format to DSS pixel format
   */
  static int video_mode_to_dss_mode(struct omap_vout_device *vout)
  {
  	struct omap_overlay *ovl;
  	struct omapvideo_info *ovid;
  	struct v4l2_pix_format *pix = &vout->pix;
  	enum omap_color_mode mode;
  
  	ovid = &vout->vid_info;
  	ovl = ovid->overlays[0];
  
  	switch (pix->pixelformat) {
  	case 0:
  		break;
  	case V4L2_PIX_FMT_YUYV:
  		mode = OMAP_DSS_COLOR_YUV2;
  		break;
  	case V4L2_PIX_FMT_UYVY:
  		mode = OMAP_DSS_COLOR_UYVY;
  		break;
  	case V4L2_PIX_FMT_RGB565:
  		mode = OMAP_DSS_COLOR_RGB16;
  		break;
  	case V4L2_PIX_FMT_RGB24:
  		mode = OMAP_DSS_COLOR_RGB24P;
  		break;
  	case V4L2_PIX_FMT_RGB32:
  		mode = (ovl->id == OMAP_DSS_VIDEO1) ?
  			OMAP_DSS_COLOR_RGB24U : OMAP_DSS_COLOR_ARGB32;
  		break;
  	case V4L2_PIX_FMT_BGR32:
  		mode = OMAP_DSS_COLOR_RGBX32;
  		break;
  	default:
  		mode = -EINVAL;
  	}
  	return mode;
  }
  
  /*
   * Setup the overlay
   */
  static int omapvid_setup_overlay(struct omap_vout_device *vout,
  		struct omap_overlay *ovl, int posx, int posy, int outw,
  		int outh, u32 addr)
  {
  	int ret = 0;
  	struct omap_overlay_info info;
  	int cropheight, cropwidth, pixheight, pixwidth;
  
  	if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0 &&
  			(outw != vout->pix.width || outh != vout->pix.height)) {
  		ret = -EINVAL;
  		goto setup_ovl_err;
  	}
  
  	vout->dss_mode = video_mode_to_dss_mode(vout);
  	if (vout->dss_mode == -EINVAL) {
  		ret = -EINVAL;
  		goto setup_ovl_err;
  	}
  
  	/* Setup the input plane parameters according to
  	 * rotation value selected.
  	 */
  	if (is_rotation_90_or_270(vout)) {
  		cropheight = vout->crop.width;
  		cropwidth = vout->crop.height;
  		pixheight = vout->pix.width;
  		pixwidth = vout->pix.height;
  	} else {
  		cropheight = vout->crop.height;
  		cropwidth = vout->crop.width;
  		pixheight = vout->pix.height;
  		pixwidth = vout->pix.width;
  	}
  
  	ovl->get_overlay_info(ovl, &info);
  	info.paddr = addr;
  	info.width = cropwidth;
  	info.height = cropheight;
  	info.color_mode = vout->dss_mode;
  	info.mirror = vout->mirror;
  	info.pos_x = posx;
  	info.pos_y = posy;
  	info.out_width = outw;
  	info.out_height = outh;
  	info.global_alpha = vout->win.global_alpha;
  	if (!is_rotation_enabled(vout)) {
  		info.rotation = 0;
  		info.rotation_type = OMAP_DSS_ROT_DMA;
  		info.screen_width = pixwidth;
  	} else {
  		info.rotation = vout->rotation;
  		info.rotation_type = OMAP_DSS_ROT_VRFB;
  		info.screen_width = 2048;
  	}
  
  	v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev,
  		"%s enable=%d addr=%x width=%d\n height=%d color_mode=%d\n"
  		"rotation=%d mirror=%d posx=%d posy=%d out_width = %d \n"
  		"out_height=%d rotation_type=%d screen_width=%d\n",
  		__func__, ovl->is_enabled(ovl), info.paddr, info.width, info.height,
  		info.color_mode, info.rotation, info.mirror, info.pos_x,
  		info.pos_y, info.out_width, info.out_height, info.rotation_type,
  		info.screen_width);
  
  	ret = ovl->set_overlay_info(ovl, &info);
  	if (ret)
  		goto setup_ovl_err;
  
  	return 0;
  
  setup_ovl_err:
  	v4l2_warn(&vout->vid_dev->v4l2_dev, "setup_overlay failed\n");
  	return ret;
  }
  
  /*
   * Initialize the overlay structure
   */
  static int omapvid_init(struct omap_vout_device *vout, u32 addr)
  {
  	int ret = 0, i;
  	struct v4l2_window *win;
  	struct omap_overlay *ovl;
  	int posx, posy, outw, outh, temp;
  	struct omap_video_timings *timing;
  	struct omapvideo_info *ovid = &vout->vid_info;
  
  	win = &vout->win;
  	for (i = 0; i < ovid->num_overlays; i++) {
  		ovl = ovid->overlays[i];
  		if (!ovl->manager || !ovl->manager->device)
  			return -EINVAL;
  
  		timing = &ovl->manager->device->panel.timings;
  
  		outw = win->w.width;
  		outh = win->w.height;
  		switch (vout->rotation) {
  		case dss_rotation_90_degree:
  			/* Invert the height and width for 90
  			 * and 270 degree rotation
  			 */
  			temp = outw;
  			outw = outh;
  			outh = temp;
  			posy = (timing->y_res - win->w.width) - win->w.left;
  			posx = win->w.top;
  			break;
  
  		case dss_rotation_180_degree:
  			posx = (timing->x_res - win->w.width) - win->w.left;
  			posy = (timing->y_res - win->w.height) - win->w.top;
  			break;
  
  		case dss_rotation_270_degree:
  			temp = outw;
  			outw = outh;
  			outh = temp;
  			posy = win->w.left;
  			posx = (timing->x_res - win->w.height) - win->w.top;
  			break;
  
  		default:
  			posx = win->w.left;
  			posy = win->w.top;
  			break;
  		}
  
  		ret = omapvid_setup_overlay(vout, ovl, posx, posy,
  				outw, outh, addr);
  		if (ret)
  			goto omapvid_init_err;
  	}
  	return 0;
  
  omapvid_init_err:
  	v4l2_warn(&vout->vid_dev->v4l2_dev, "apply_changes failed\n");
  	return ret;
  }
  
  /*
   * Apply the changes set the go bit of DSS
   */
  static int omapvid_apply_changes(struct omap_vout_device *vout)
  {
  	int i;
  	struct omap_overlay *ovl;
  	struct omapvideo_info *ovid = &vout->vid_info;
  
  	for (i = 0; i < ovid->num_overlays; i++) {
  		ovl = ovid->overlays[i];
  		if (!ovl->manager || !ovl->manager->device)
  			return -EINVAL;
  		ovl->manager->apply(ovl->manager);
  	}
  
  	return 0;
  }
  
  static int omapvid_handle_interlace_display(struct omap_vout_device *vout,
  		unsigned int irqstatus, struct timeval timevalue)
  {
  	u32 fid;
  
  	if (vout->first_int) {
  		vout->first_int = 0;
  		goto err;
  	}
  
  	if (irqstatus & DISPC_IRQ_EVSYNC_ODD)
  		fid = 1;
  	else if (irqstatus & DISPC_IRQ_EVSYNC_EVEN)
  		fid = 0;
  	else
  		goto err;
  
  	vout->field_id ^= 1;
  	if (fid != vout->field_id) {
  		if (fid == 0)
  			vout->field_id = fid;
  	} else if (0 == fid) {
  		if (vout->cur_frm == vout->next_frm)
  			goto err;
  
  		vout->cur_frm->ts = timevalue;
  		vout->cur_frm->state = VIDEOBUF_DONE;
  		wake_up_interruptible(&vout->cur_frm->done);
  		vout->cur_frm = vout->next_frm;
  	} else {
  		if (list_empty(&vout->dma_queue) ||
  				(vout->cur_frm != vout->next_frm))
  			goto err;
  	}
  
  	return vout->field_id;
  err:
  	return 0;
  }
  
  static void omap_vout_isr(void *arg, unsigned int irqstatus)
  {
  	int ret, fid, mgr_id;
  	u32 addr, irq;
  	struct omap_overlay *ovl;
  	struct timeval timevalue;
  	struct omapvideo_info *ovid;
  	struct omap_dss_device *cur_display;
  	struct omap_vout_device *vout = (struct omap_vout_device *)arg;
  
  	if (!vout->streaming)
  		return;
  
  	ovid = &vout->vid_info;
  	ovl = ovid->overlays[0];
  	/* get the display device attached to the overlay */
  	if (!ovl->manager || !ovl->manager->device)
  		return;
  
  	mgr_id = ovl->manager->id;
  	cur_display = ovl->manager->device;
  
  	spin_lock(&vout->vbq_lock);
  	do_gettimeofday(&timevalue);
  
  	switch (cur_display->type) {
  	case OMAP_DISPLAY_TYPE_DSI:
  	case OMAP_DISPLAY_TYPE_DPI:
  		if (mgr_id == OMAP_DSS_CHANNEL_LCD)
  			irq = DISPC_IRQ_VSYNC;
  		else if (mgr_id == OMAP_DSS_CHANNEL_LCD2)
  			irq = DISPC_IRQ_VSYNC2;
  		else
  			goto vout_isr_err;
  
  		if (!(irqstatus & irq))
  			goto vout_isr_err;
  		break;
  	case OMAP_DISPLAY_TYPE_VENC:
  		fid = omapvid_handle_interlace_display(vout, irqstatus,
  				timevalue);
  		if (!fid)
  			goto vout_isr_err;
  		break;
  	case OMAP_DISPLAY_TYPE_HDMI:
  		if (!(irqstatus & DISPC_IRQ_EVSYNC_EVEN))
  			goto vout_isr_err;
  		break;
  	default:
  		goto vout_isr_err;
  	}
  
  	if (!vout->first_int && (vout->cur_frm != vout->next_frm)) {
  		vout->cur_frm->ts = timevalue;
  		vout->cur_frm->state = VIDEOBUF_DONE;
  		wake_up_interruptible(&vout->cur_frm->done);
  		vout->cur_frm = vout->next_frm;
  	}
  
  	vout->first_int = 0;
  	if (list_empty(&vout->dma_queue))
  		goto vout_isr_err;
  
  	vout->next_frm = list_entry(vout->dma_queue.next,
  			struct videobuf_buffer, queue);
  	list_del(&vout->next_frm->queue);
  
  	vout->next_frm->state = VIDEOBUF_ACTIVE;
  
  	addr = (unsigned long) vout->queued_buf_addr[vout->next_frm->i]
  		+ vout->cropped_offset;
  
  	/* First save the configuration in ovelray structure */
  	ret = omapvid_init(vout, addr);
  	if (ret)
  		printk(KERN_ERR VOUT_NAME
  			"failed to set overlay info\n");
  	/* Enable the pipeline and set the Go bit */
  	ret = omapvid_apply_changes(vout);
  	if (ret)
  		printk(KERN_ERR VOUT_NAME "failed to change mode\n");
  
  vout_isr_err:
  	spin_unlock(&vout->vbq_lock);
  }
  
  /* Video buffer call backs */
  
  /*
   * Buffer setup function is called by videobuf layer when REQBUF ioctl is
   * called. This is used to setup buffers and return size and count of
   * buffers allocated. After the call to this buffer, videobuf layer will
   * setup buffer queue depending on the size and count of buffers
   */
  static int omap_vout_buffer_setup(struct videobuf_queue *q, unsigned int *count,
  			  unsigned int *size)
  {
  	int startindex = 0, i, j;
  	u32 phy_addr = 0, virt_addr = 0;
  	struct omap_vout_device *vout = q->priv_data;
  	struct omapvideo_info *ovid = &vout->vid_info;
  	int vid_max_buf_size;
  
  	if (!vout)
  		return -EINVAL;
  
  	vid_max_buf_size = vout->vid == OMAP_VIDEO1 ? video1_bufsize :
  		video2_bufsize;
  
  	if (V4L2_BUF_TYPE_VIDEO_OUTPUT != q->type)
  		return -EINVAL;
  
  	startindex = (vout->vid == OMAP_VIDEO1) ?
  		video1_numbuffers : video2_numbuffers;
  	if (V4L2_MEMORY_MMAP == vout->memory && *count < startindex)
  		*count = startindex;
  
  	if (ovid->rotation_type == VOUT_ROT_VRFB) {
  		if (omap_vout_vrfb_buffer_setup(vout, count, startindex))
  			return -ENOMEM;
  	}
  
  	if (V4L2_MEMORY_MMAP != vout->memory)
  		return 0;
  
  	/* Now allocated the V4L2 buffers */
  	*size = PAGE_ALIGN(vout->pix.width * vout->pix.height * vout->bpp);
  	startindex = (vout->vid == OMAP_VIDEO1) ?
  		video1_numbuffers : video2_numbuffers;
  
  	/* Check the size of the buffer */
  	if (*size > vid_max_buf_size) {
  		v4l2_err(&vout->vid_dev->v4l2_dev,
  				"buffer allocation mismatch [%u] [%u]\n",
  				*size, vout->buffer_size);
  		return -ENOMEM;
  	}
  
  	for (i = startindex; i < *count; i++) {
  		vout->buffer_size = *size;
  
  		virt_addr = omap_vout_alloc_buffer(vout->buffer_size,
  				&phy_addr);
  		if (!virt_addr) {
  			if (ovid->rotation_type == VOUT_ROT_NONE) {
  				break;
  			} else {
  				if (!is_rotation_enabled(vout))
  					break;
  			/* Free the VRFB buffers if no space for V4L2 buffers */
  			for (j = i; j < *count; j++) {
  				omap_vout_free_buffer(
  						vout->smsshado_virt_addr[j],
  						vout->smsshado_size);
  				vout->smsshado_virt_addr[j] = 0;
  				vout->smsshado_phy_addr[j] = 0;
  				}
  			}
  		}
  		vout->buf_virt_addr[i] = virt_addr;
  		vout->buf_phy_addr[i] = phy_addr;
  	}
  	*count = vout->buffer_allocated = i;
  
  	return 0;
  }
  
  /*
   * Free the V4L2 buffers additionally allocated than default
   * number of buffers
   */
  static void omap_vout_free_extra_buffers(struct omap_vout_device *vout)
  {
  	int num_buffers = 0, i;
  
  	num_buffers = (vout->vid == OMAP_VIDEO1) ?
  		video1_numbuffers : video2_numbuffers;
  
  	for (i = num_buffers; i < vout->buffer_allocated; i++) {
  		if (vout->buf_virt_addr[i])
  			omap_vout_free_buffer(vout->buf_virt_addr[i],
  					vout->buffer_size);
  
  		vout->buf_virt_addr[i] = 0;
  		vout->buf_phy_addr[i] = 0;
  	}
  	vout->buffer_allocated = num_buffers;
  }
  
  /*
   * This function will be called when VIDIOC_QBUF ioctl is called.
   * It prepare buffers before give out for the display. This function
   * converts user space virtual address into physical address if userptr memory
   * exchange mechanism is used. If rotation is enabled, it copies entire
   * buffer into VRFB memory space before giving it to the DSS.
   */
  static int omap_vout_buffer_prepare(struct videobuf_queue *q,
  			struct videobuf_buffer *vb,
  			enum v4l2_field field)
  {
  	struct omap_vout_device *vout = q->priv_data;
  	struct omapvideo_info *ovid = &vout->vid_info;
  
  	if (VIDEOBUF_NEEDS_INIT == vb->state) {
  		vb->width = vout->pix.width;
  		vb->height = vout->pix.height;
  		vb->size = vb->width * vb->height * vout->bpp;
  		vb->field = field;
  	}
  	vb->state = VIDEOBUF_PREPARED;
  	/* if user pointer memory mechanism is used, get the physical
  	 * address of the buffer
  	 */
  	if (V4L2_MEMORY_USERPTR == vb->memory) {
  		if (0 == vb->baddr)
  			return -EINVAL;
  		/* Physical address */
  		vout->queued_buf_addr[vb->i] = (u8 *)
  			omap_vout_uservirt_to_phys(vb->baddr);
  	} else {
  		u32 addr, dma_addr;
  		unsigned long size;
  
  		addr = (unsigned long) vout->buf_virt_addr[vb->i];
  		size = (unsigned long) vb->size;
  
  		dma_addr = dma_map_single(vout->vid_dev->v4l2_dev.dev, (void *) addr,
  				size, DMA_TO_DEVICE);
  		if (dma_mapping_error(vout->vid_dev->v4l2_dev.dev, dma_addr))
  			v4l2_err(&vout->vid_dev->v4l2_dev, "dma_map_single failed\n");
  
  		vout->queued_buf_addr[vb->i] = (u8 *)vout->buf_phy_addr[vb->i];
  	}
  
  	if (ovid->rotation_type == VOUT_ROT_VRFB)
  		return omap_vout_prepare_vrfb(vout, vb);
  	else
  		return 0;
  }
  
  /*
   * Buffer queue function will be called from the videobuf layer when _QBUF
   * ioctl is called. It is used to enqueue buffer, which is ready to be
   * displayed.
   */
  static void omap_vout_buffer_queue(struct videobuf_queue *q,
  			  struct videobuf_buffer *vb)
  {
  	struct omap_vout_device *vout = q->priv_data;
  
  	/* Driver is also maintainig a queue. So enqueue buffer in the driver
  	 * queue */
  	list_add_tail(&vb->queue, &vout->dma_queue);
  
  	vb->state = VIDEOBUF_QUEUED;
  }
  
  /*
   * Buffer release function is called from videobuf layer to release buffer
   * which are already allocated
   */
  static void omap_vout_buffer_release(struct videobuf_queue *q,
  			    struct videobuf_buffer *vb)
  {
  	struct omap_vout_device *vout = q->priv_data;
  
  	vb->state = VIDEOBUF_NEEDS_INIT;
  
  	if (V4L2_MEMORY_MMAP != vout->memory)
  		return;
  }
  
  /*
   *  File operations
   */
  static unsigned int omap_vout_poll(struct file *file,
  				   struct poll_table_struct *wait)
  {
  	struct omap_vout_device *vout = file->private_data;
  	struct videobuf_queue *q = &vout->vbq;
  
  	return videobuf_poll_stream(file, q, wait);
  }
  
  static void omap_vout_vm_open(struct vm_area_struct *vma)
  {
  	struct omap_vout_device *vout = vma->vm_private_data;
  
  	v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev,
  		"vm_open [vma=%08lx-%08lx]\n", vma->vm_start, vma->vm_end);
  	vout->mmap_count++;
  }
  
  static void omap_vout_vm_close(struct vm_area_struct *vma)
  {
  	struct omap_vout_device *vout = vma->vm_private_data;
  
  	v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev,
  		"vm_close [vma=%08lx-%08lx]\n", vma->vm_start, vma->vm_end);
  	vout->mmap_count--;
  }
  
  static struct vm_operations_struct omap_vout_vm_ops = {
  	.open	= omap_vout_vm_open,
  	.close	= omap_vout_vm_close,
  };
  
  static int omap_vout_mmap(struct file *file, struct vm_area_struct *vma)
  {
  	int i;
  	void *pos;
  	unsigned long start = vma->vm_start;
  	unsigned long size = (vma->vm_end - vma->vm_start);
  	struct omap_vout_device *vout = file->private_data;
  	struct videobuf_queue *q = &vout->vbq;
  
  	v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev,
  			" %s pgoff=0x%lx, start=0x%lx, end=0x%lx\n", __func__,
  			vma->vm_pgoff, vma->vm_start, vma->vm_end);
  
  	/* look for the buffer to map */
  	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
  		if (NULL == q->bufs[i])
  			continue;
  		if (V4L2_MEMORY_MMAP != q->bufs[i]->memory)
  			continue;
  		if (q->bufs[i]->boff == (vma->vm_pgoff << PAGE_SHIFT))
  			break;
  	}
  
  	if (VIDEO_MAX_FRAME == i) {
  		v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev,
  				"offset invalid [offset=0x%lx]\n",
  				(vma->vm_pgoff << PAGE_SHIFT));
  		return -EINVAL;
  	}
  	/* Check the size of the buffer */
  	if (size > vout->buffer_size) {
  		v4l2_err(&vout->vid_dev->v4l2_dev,
  				"insufficient memory [%lu] [%u]\n",
  				size, vout->buffer_size);
  		return -ENOMEM;
  	}
  
  	q->bufs[i]->baddr = vma->vm_start;
  
  	vma->vm_flags |= VM_RESERVED;
  	vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
  	vma->vm_ops = &omap_vout_vm_ops;
  	vma->vm_private_data = (void *) vout;
  	pos = (void *)vout->buf_virt_addr[i];
  	vma->vm_pgoff = virt_to_phys((void *)pos) >> PAGE_SHIFT;
  	while (size > 0) {
  		unsigned long pfn;
  		pfn = virt_to_phys((void *) pos) >> PAGE_SHIFT;
  		if (remap_pfn_range(vma, start, pfn, PAGE_SIZE, PAGE_SHARED))
  			return -EAGAIN;
  		start += PAGE_SIZE;
  		pos += PAGE_SIZE;
  		size -= PAGE_SIZE;
  	}
  	vout->mmap_count++;
  	v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev, "Exiting %s\n", __func__);
  
  	return 0;
  }
  
  static int omap_vout_release(struct file *file)
  {
  	unsigned int ret, i;
  	struct videobuf_queue *q;
  	struct omapvideo_info *ovid;
  	struct omap_vout_device *vout = file->private_data;
  
  	v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev, "Entering %s\n", __func__);
  	ovid = &vout->vid_info;
  
  	if (!vout)
  		return 0;
  
  	q = &vout->vbq;
  	/* Disable all the overlay managers connected with this interface */
  	for (i = 0; i < ovid->num_overlays; i++) {
  		struct omap_overlay *ovl = ovid->overlays[i];
  		if (ovl->manager && ovl->manager->device)
  			ovl->disable(ovl);
  	}
  	/* Turn off the pipeline */
  	ret = omapvid_apply_changes(vout);
  	if (ret)
  		v4l2_warn(&vout->vid_dev->v4l2_dev,
  				"Unable to apply changes\n");
  
  	/* Free all buffers */
  	omap_vout_free_extra_buffers(vout);
  
  	/* Free the VRFB buffers only if they are allocated
  	 * during reqbufs.  Don't free if init time allocated
  	 */
  	if (ovid->rotation_type == VOUT_ROT_VRFB) {
  		if (!vout->vrfb_static_allocation)
  			omap_vout_free_vrfb_buffers(vout);
  	}
  	videobuf_mmap_free(q);
  
  	/* Even if apply changes fails we should continue
  	   freeing allocated memory */
  	if (vout->streaming) {
  		u32 mask = 0;
  
  		mask = DISPC_IRQ_VSYNC | DISPC_IRQ_EVSYNC_EVEN |
  			DISPC_IRQ_EVSYNC_ODD | DISPC_IRQ_VSYNC2;
  		omap_dispc_unregister_isr(omap_vout_isr, vout, mask);
  		vout->streaming = 0;
  
  		videobuf_streamoff(q);
  		videobuf_queue_cancel(q);
  	}
  
  	if (vout->mmap_count != 0)
  		vout->mmap_count = 0;
  
  	vout->opened -= 1;
  	file->private_data = NULL;
  
  	if (vout->buffer_allocated)
  		videobuf_mmap_free(q);
  
  	v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev, "Exiting %s\n", __func__);
  	return ret;
  }
  
  static int omap_vout_open(struct file *file)
  {
  	struct videobuf_queue *q;
  	struct omap_vout_device *vout = NULL;
  
  	vout = video_drvdata(file);
  	v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev, "Entering %s\n", __func__);
  
  	if (vout == NULL)
  		return -ENODEV;
  
  	/* for now, we only support single open */
  	if (vout->opened)
  		return -EBUSY;
  
  	vout->opened += 1;
  
  	file->private_data = vout;
  	vout->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
  
  	q = &vout->vbq;
  	video_vbq_ops.buf_setup = omap_vout_buffer_setup;
  	video_vbq_ops.buf_prepare = omap_vout_buffer_prepare;
  	video_vbq_ops.buf_release = omap_vout_buffer_release;
  	video_vbq_ops.buf_queue = omap_vout_buffer_queue;
  	spin_lock_init(&vout->vbq_lock);
  
  	videobuf_queue_dma_contig_init(q, &video_vbq_ops, q->dev,
  			&vout->vbq_lock, vout->type, V4L2_FIELD_NONE,
  			sizeof(struct videobuf_buffer), vout, NULL);
  
  	v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev, "Exiting %s\n", __func__);
  	return 0;
  }
  
  /*
   * V4L2 ioctls
   */
  static int vidioc_querycap(struct file *file, void *fh,
  		struct v4l2_capability *cap)
  {
  	struct omap_vout_device *vout = fh;
  
  	strlcpy(cap->driver, VOUT_NAME, sizeof(cap->driver));
  	strlcpy(cap->card, vout->vfd->name, sizeof(cap->card));
  	cap->bus_info[0] = '\0';
  	cap->capabilities = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_OUTPUT |
  		V4L2_CAP_VIDEO_OUTPUT_OVERLAY;
  
  	return 0;
  }
  
  static int vidioc_enum_fmt_vid_out(struct file *file, void *fh,
  			struct v4l2_fmtdesc *fmt)
  {
  	int index = fmt->index;
  
  	if (index >= NUM_OUTPUT_FORMATS)
  		return -EINVAL;
  
  	fmt->flags = omap_formats[index].flags;
  	strlcpy(fmt->description, omap_formats[index].description,
  			sizeof(fmt->description));
  	fmt->pixelformat = omap_formats[index].pixelformat;
  
  	return 0;
  }
  
  static int vidioc_g_fmt_vid_out(struct file *file, void *fh,
  			struct v4l2_format *f)
  {
  	struct omap_vout_device *vout = fh;
  
  	f->fmt.pix = vout->pix;
  	return 0;
  
  }
  
  static int vidioc_try_fmt_vid_out(struct file *file, void *fh,
  			struct v4l2_format *f)
  {
  	struct omap_overlay *ovl;
  	struct omapvideo_info *ovid;
  	struct omap_video_timings *timing;
  	struct omap_vout_device *vout = fh;
  
  	ovid = &vout->vid_info;
  	ovl = ovid->overlays[0];
  
  	if (!ovl->manager || !ovl->manager->device)
  		return -EINVAL;
  	/* get the display device attached to the overlay */
  	timing = &ovl->manager->device->panel.timings;
  
  	vout->fbuf.fmt.height = timing->y_res;
  	vout->fbuf.fmt.width = timing->x_res;
  
  	omap_vout_try_format(&f->fmt.pix);
  	return 0;
  }
  
  static int vidioc_s_fmt_vid_out(struct file *file, void *fh,
  			struct v4l2_format *f)
  {
  	int ret, bpp;
  	struct omap_overlay *ovl;
  	struct omapvideo_info *ovid;
  	struct omap_video_timings *timing;
  	struct omap_vout_device *vout = fh;
  
  	if (vout->streaming)
  		return -EBUSY;
  
  	mutex_lock(&vout->lock);
  
  	ovid = &vout->vid_info;
  	ovl = ovid->overlays[0];
  
  	/* get the display device attached to the overlay */
  	if (!ovl->manager || !ovl->manager->device) {
  		ret = -EINVAL;
  		goto s_fmt_vid_out_exit;
  	}
  	timing = &ovl->manager->device->panel.timings;
  
  	/* We dont support RGB24-packed mode if vrfb rotation
  	 * is enabled*/
  	if ((is_rotation_enabled(vout)) &&
  			f->fmt.pix.pixelformat == V4L2_PIX_FMT_RGB24) {
  		ret = -EINVAL;
  		goto s_fmt_vid_out_exit;
  	}
  
  	/* get the framebuffer parameters */
  
  	if (is_rotation_90_or_270(vout)) {
  		vout->fbuf.fmt.height = timing->x_res;
  		vout->fbuf.fmt.width = timing->y_res;
  	} else {
  		vout->fbuf.fmt.height = timing->y_res;
  		vout->fbuf.fmt.width = timing->x_res;
  	}
  
  	/* change to samller size is OK */
  
  	bpp = omap_vout_try_format(&f->fmt.pix);
  	f->fmt.pix.sizeimage = f->fmt.pix.width * f->fmt.pix.height * bpp;
  
  	/* try & set the new output format */
  	vout->bpp = bpp;
  	vout->pix = f->fmt.pix;
  	vout->vrfb_bpp = 1;
  
  	/* If YUYV then vrfb bpp is 2, for  others its 1 */
  	if (V4L2_PIX_FMT_YUYV == vout->pix.pixelformat ||
  			V4L2_PIX_FMT_UYVY == vout->pix.pixelformat)
  		vout->vrfb_bpp = 2;
  
  	/* set default crop and win */
  	omap_vout_new_format(&vout->pix, &vout->fbuf, &vout->crop, &vout->win);
  
  	/* Save the changes in the overlay strcuture */
  	ret = omapvid_init(vout, 0);
  	if (ret) {
  		v4l2_err(&vout->vid_dev->v4l2_dev, "failed to change mode\n");
  		goto s_fmt_vid_out_exit;
  	}
  
  	ret = 0;
  
  s_fmt_vid_out_exit:
  	mutex_unlock(&vout->lock);
  	return ret;
  }
  
  static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh,
  			struct v4l2_format *f)
  {
  	int ret = 0;
  	struct omap_vout_device *vout = fh;
  	struct omap_overlay *ovl;
  	struct omapvideo_info *ovid;
  	struct v4l2_window *win = &f->fmt.win;
  
  	ovid = &vout->vid_info;
  	ovl = ovid->overlays[0];
  
  	ret = omap_vout_try_window(&vout->fbuf, win);
  
  	if (!ret) {
  		if ((ovl->caps & OMAP_DSS_OVL_CAP_GLOBAL_ALPHA) == 0)
  			win->global_alpha = 255;
  		else
  			win->global_alpha = f->fmt.win.global_alpha;
  	}
  
  	return ret;
  }
  
  static int vidioc_s_fmt_vid_overlay(struct file *file, void *fh,
  			struct v4l2_format *f)
  {
  	int ret = 0;
  	struct omap_overlay *ovl;
  	struct omapvideo_info *ovid;
  	struct omap_vout_device *vout = fh;
  	struct v4l2_window *win = &f->fmt.win;
  
  	mutex_lock(&vout->lock);
  	ovid = &vout->vid_info;
  	ovl = ovid->overlays[0];
  
  	ret = omap_vout_new_window(&vout->crop, &vout->win, &vout->fbuf, win);
  	if (!ret) {
  		/* Video1 plane does not support global alpha on OMAP3 */
  		if ((ovl->caps & OMAP_DSS_OVL_CAP_GLOBAL_ALPHA) == 0)
  			vout->win.global_alpha = 255;
  		else
  			vout->win.global_alpha = f->fmt.win.global_alpha;
  
  		vout->win.chromakey = f->fmt.win.chromakey;
  	}
  	mutex_unlock(&vout->lock);
  	return ret;
  }
  
  static int vidioc_enum_fmt_vid_overlay(struct file *file, void *fh,
  			struct v4l2_fmtdesc *fmt)
  {
  	int index = fmt->index;
  
  	if (index >= NUM_OUTPUT_FORMATS)
  		return -EINVAL;
  
  	fmt->flags = omap_formats[index].flags;
  	strlcpy(fmt->description, omap_formats[index].description,
  			sizeof(fmt->description));
  	fmt->pixelformat = omap_formats[index].pixelformat;
  	return 0;
  }
  
  static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh,
  			struct v4l2_format *f)
  {
  	u32 key_value =  0;
  	struct omap_overlay *ovl;
  	struct omapvideo_info *ovid;
  	struct omap_vout_device *vout = fh;
  	struct omap_overlay_manager_info info;
  	struct v4l2_window *win = &f->fmt.win;
  
  	ovid = &vout->vid_info;
  	ovl = ovid->overlays[0];
  
  	win->w = vout->win.w;
  	win->field = vout->win.field;
  	win->global_alpha = vout->win.global_alpha;
  
  	if (ovl->manager && ovl->manager->get_manager_info) {
  		ovl->manager->get_manager_info(ovl->manager, &info);
  		key_value = info.trans_key;
  	}
  	win->chromakey = key_value;
  	return 0;
  }
  
  static int vidioc_cropcap(struct file *file, void *fh,
  		struct v4l2_cropcap *cropcap)
  {
  	struct omap_vout_device *vout = fh;
  	struct v4l2_pix_format *pix = &vout->pix;
  
  	if (cropcap->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
  		return -EINVAL;
  
  	/* Width and height are always even */
  	cropcap->bounds.width = pix->width & ~1;
  	cropcap->bounds.height = pix->height & ~1;
  
  	omap_vout_default_crop(&vout->pix, &vout->fbuf, &cropcap->defrect);
  	cropcap->pixelaspect.numerator = 1;
  	cropcap->pixelaspect.denominator = 1;
  	return 0;
  }
  
  static int vidioc_g_crop(struct file *file, void *fh, struct v4l2_crop *crop)
  {
  	struct omap_vout_device *vout = fh;
  
  	if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
  		return -EINVAL;
  	crop->c = vout->crop;
  	return 0;
  }
  
  static int vidioc_s_crop(struct file *file, void *fh, struct v4l2_crop *crop)
  {
  	int ret = -EINVAL;
  	struct omap_vout_device *vout = fh;
  	struct omapvideo_info *ovid;
  	struct omap_overlay *ovl;
  	struct omap_video_timings *timing;
  
  	if (vout->streaming)
  		return -EBUSY;
  
  	mutex_lock(&vout->lock);
  	ovid = &vout->vid_info;
  	ovl = ovid->overlays[0];
  
  	if (!ovl->manager || !ovl->manager->device) {
  		ret = -EINVAL;
  		goto s_crop_err;
  	}
  	/* get the display device attached to the overlay */
  	timing = &ovl->manager->device->panel.timings;
  
  	if (is_rotation_90_or_270(vout)) {
  		vout->fbuf.fmt.height = timing->x_res;
  		vout->fbuf.fmt.width = timing->y_res;
  	} else {
  		vout->fbuf.fmt.height = timing->y_res;
  		vout->fbuf.fmt.width = timing->x_res;
  	}
  
  	if (crop->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
  		ret = omap_vout_new_crop(&vout->pix, &vout->crop, &vout->win,
  				&vout->fbuf, &crop->c);
  
  s_crop_err:
  	mutex_unlock(&vout->lock);
  	return ret;
  }
  
  static int vidioc_queryctrl(struct file *file, void *fh,
  		struct v4l2_queryctrl *ctrl)
  {
  	int ret = 0;
  
  	switch (ctrl->id) {
  	case V4L2_CID_ROTATE:
  		ret = v4l2_ctrl_query_fill(ctrl, 0, 270, 90, 0);
  		break;
  	case V4L2_CID_BG_COLOR:
  		ret = v4l2_ctrl_query_fill(ctrl, 0, 0xFFFFFF, 1, 0);
  		break;
  	case V4L2_CID_VFLIP:
  		ret = v4l2_ctrl_query_fill(ctrl, 0, 1, 1, 0);
  		break;
  	default:
  		ctrl->name[0] = '\0';
  		ret = -EINVAL;
  	}
  	return ret;
  }
  
  static int vidioc_g_ctrl(struct file *file, void *fh, struct v4l2_control *ctrl)
  {
  	int ret = 0;
  	struct omap_vout_device *vout = fh;
  
  	switch (ctrl->id) {
  	case V4L2_CID_ROTATE:
  		ctrl->value = vout->control[0].value;
  		break;
  	case V4L2_CID_BG_COLOR:
  	{
  		struct omap_overlay_manager_info info;
  		struct omap_overlay *ovl;
  
  		ovl = vout->vid_info.overlays[0];
  		if (!ovl->manager || !ovl->manager->get_manager_info) {
  			ret = -EINVAL;
  			break;
  		}
  
  		ovl->manager->get_manager_info(ovl->manager, &info);
  		ctrl->value = info.default_color;
  		break;
  	}
  	case V4L2_CID_VFLIP:
  		ctrl->value = vout->control[2].value;
  		break;
  	default:
  		ret = -EINVAL;
  	}
  	return ret;
  }
  
  static int vidioc_s_ctrl(struct file *file, void *fh, struct v4l2_control *a)
  {
  	int ret = 0;
  	struct omap_vout_device *vout = fh;
  
  	switch (a->id) {
  	case V4L2_CID_ROTATE:
  	{
  		struct omapvideo_info *ovid;
  		int rotation = a->value;
  
  		ovid = &vout->vid_info;
  
  		mutex_lock(&vout->lock);
  		if (rotation && ovid->rotation_type == VOUT_ROT_NONE) {
  			mutex_unlock(&vout->lock);
  			ret = -ERANGE;
  			break;
  		}
  
  		if (rotation && vout->pix.pixelformat == V4L2_PIX_FMT_RGB24) {
  			mutex_unlock(&vout->lock);
  			ret = -EINVAL;
  			break;
  		}
  
  		if (v4l2_rot_to_dss_rot(rotation, &vout->rotation,
  							vout->mirror)) {
  			mutex_unlock(&vout->lock);
  			ret = -EINVAL;
  			break;
  		}
  
  		vout->control[0].value = rotation;
  		mutex_unlock(&vout->lock);
  		break;
  	}
  	case V4L2_CID_BG_COLOR:
  	{
  		struct omap_overlay *ovl;
  		unsigned int  color = a->value;
  		struct omap_overlay_manager_info info;
  
  		ovl = vout->vid_info.overlays[0];
  
  		mutex_lock(&vout->lock);
  		if (!ovl->manager || !ovl->manager->get_manager_info) {
  			mutex_unlock(&vout->lock);
  			ret = -EINVAL;
  			break;
  		}
  
  		ovl->manager->get_manager_info(ovl->manager, &info);
  		info.default_color = color;
  		if (ovl->manager->set_manager_info(ovl->manager, &info)) {
  			mutex_unlock(&vout->lock);
  			ret = -EINVAL;
  			break;
  		}
  
  		vout->control[1].value = color;
  		mutex_unlock(&vout->lock);
  		break;
  	}
  	case V4L2_CID_VFLIP:
  	{
  		struct omap_overlay *ovl;
  		struct omapvideo_info *ovid;
  		unsigned int  mirror = a->value;
  
  		ovid = &vout->vid_info;
  		ovl = ovid->overlays[0];
  
  		mutex_lock(&vout->lock);
  		if (mirror && ovid->rotation_type == VOUT_ROT_NONE) {
  			mutex_unlock(&vout->lock);
  			ret = -ERANGE;
  			break;
  		}
  
  		if (mirror  && vout->pix.pixelformat == V4L2_PIX_FMT_RGB24) {
  			mutex_unlock(&vout->lock);
  			ret = -EINVAL;
  			break;
  		}
  		vout->mirror = mirror;
  		vout->control[2].value = mirror;
  		mutex_unlock(&vout->lock);
  		break;
  	}
  	default:
  		ret = -EINVAL;
  	}
  	return ret;
  }
  
  static int vidioc_reqbufs(struct file *file, void *fh,
  			struct v4l2_requestbuffers *req)
  {
  	int ret = 0;
  	unsigned int i, num_buffers = 0;
  	struct omap_vout_device *vout = fh;
  	struct videobuf_queue *q = &vout->vbq;
  
  	if ((req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) || (req->count < 0))
  		return -EINVAL;
  	/* if memory is not mmp or userptr
  	   return error */
  	if ((V4L2_MEMORY_MMAP != req->memory) &&
  			(V4L2_MEMORY_USERPTR != req->memory))
  		return -EINVAL;
  
  	mutex_lock(&vout->lock);
  	/* Cannot be requested when streaming is on */
  	if (vout->streaming) {
  		ret = -EBUSY;
  		goto reqbuf_err;
  	}
  
  	/* If buffers are already allocated free them */
  	if (q->bufs[0] && (V4L2_MEMORY_MMAP == q->bufs[0]->memory)) {
  		if (vout->mmap_count) {
  			ret = -EBUSY;
  			goto reqbuf_err;
  		}
  		num_buffers = (vout->vid == OMAP_VIDEO1) ?
  			video1_numbuffers : video2_numbuffers;
  		for (i = num_buffers; i < vout->buffer_allocated; i++) {
  			omap_vout_free_buffer(vout->buf_virt_addr[i],
  					vout->buffer_size);
  			vout->buf_virt_addr[i] = 0;
  			vout->buf_phy_addr[i] = 0;
  		}
  		vout->buffer_allocated = num_buffers;
  		videobuf_mmap_free(q);
  	} else if (q->bufs[0] && (V4L2_MEMORY_USERPTR == q->bufs[0]->memory)) {
  		if (vout->buffer_allocated) {
  			videobuf_mmap_free(q);
  			for (i = 0; i < vout->buffer_allocated; i++) {
  				kfree(q->bufs[i]);
  				q->bufs[i] = NULL;
  			}
  			vout->buffer_allocated = 0;
  		}
  	}
  
  	/*store the memory type in data structure */
  	vout->memory = req->memory;
  
  	INIT_LIST_HEAD(&vout->dma_queue);
  
  	/* call videobuf_reqbufs api */
  	ret = videobuf_reqbufs(q, req);
  	if (ret < 0)
  		goto reqbuf_err;
  
  	vout->buffer_allocated = req->count;
  
  reqbuf_err:
  	mutex_unlock(&vout->lock);
  	return ret;
  }
  
  static int vidioc_querybuf(struct file *file, void *fh,
  			struct v4l2_buffer *b)
  {
  	struct omap_vout_device *vout = fh;
  
  	return videobuf_querybuf(&vout->vbq, b);
  }
  
  static int vidioc_qbuf(struct file *file, void *fh,
  			struct v4l2_buffer *buffer)
  {
  	struct omap_vout_device *vout = fh;
  	struct videobuf_queue *q = &vout->vbq;
  
  	if ((V4L2_BUF_TYPE_VIDEO_OUTPUT != buffer->type) ||
  			(buffer->index >= vout->buffer_allocated) ||
  			(q->bufs[buffer->index]->memory != buffer->memory)) {
  		return -EINVAL;
  	}
  	if (V4L2_MEMORY_USERPTR == buffer->memory) {
  		if ((buffer->length < vout->pix.sizeimage) ||
  				(0 == buffer->m.userptr)) {
  			return -EINVAL;
  		}
  	}
  
  	if ((is_rotation_enabled(vout)) &&
  			vout->vrfb_dma_tx.req_status == DMA_CHAN_NOT_ALLOTED) {
  		v4l2_warn(&vout->vid_dev->v4l2_dev,
  				"DMA Channel not allocated for Rotation\n");
  		return -EINVAL;
  	}
  
  	return videobuf_qbuf(q, buffer);
  }
  
  static int vidioc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
  {
  	struct omap_vout_device *vout = fh;
  	struct videobuf_queue *q = &vout->vbq;
  
  	int ret;
  	u32 addr;
  	unsigned long size;
  	struct videobuf_buffer *vb;
  
  	vb = q->bufs[b->index];
  
  	if (!vout->streaming)
  		return -EINVAL;
  
  	if (file->f_flags & O_NONBLOCK)
  		/* Call videobuf_dqbuf for non blocking mode */
  		ret = videobuf_dqbuf(q, (struct v4l2_buffer *)b, 1);
  	else
  		/* Call videobuf_dqbuf for  blocking mode */
  		ret = videobuf_dqbuf(q, (struct v4l2_buffer *)b, 0);
  
  	addr = (unsigned long) vout->buf_phy_addr[vb->i];
  	size = (unsigned long) vb->size;
  	dma_unmap_single(vout->vid_dev->v4l2_dev.dev,  addr,
  				size, DMA_TO_DEVICE);
  	return ret;
  }
  
  static int vidioc_streamon(struct file *file, void *fh, enum v4l2_buf_type i)
  {
  	int ret = 0, j;
  	u32 addr = 0, mask = 0;
  	struct omap_vout_device *vout = fh;
  	struct videobuf_queue *q = &vout->vbq;
  	struct omapvideo_info *ovid = &vout->vid_info;
  
  	mutex_lock(&vout->lock);
  
  	if (vout->streaming) {
  		ret = -EBUSY;
  		goto streamon_err;
  	}
  
  	ret = videobuf_streamon(q);
  	if (ret)
  		goto streamon_err;
  
  	if (list_empty(&vout->dma_queue)) {
  		ret = -EIO;
  		goto streamon_err1;
  	}
  
  	/* Get the next frame from the buffer queue */
  	vout->next_frm = vout->cur_frm = list_entry(vout->dma_queue.next,
  			struct videobuf_buffer, queue);
  	/* Remove buffer from the buffer queue */
  	list_del(&vout->cur_frm->queue);
  	/* Mark state of the current frame to active */
  	vout->cur_frm->state = VIDEOBUF_ACTIVE;
  	/* Initialize field_id and started member */
  	vout->field_id = 0;
  
  	/* set flag here. Next QBUF will start DMA */
  	vout->streaming = 1;
  
  	vout->first_int = 1;
  
  	if (omap_vout_calculate_offset(vout)) {
  		ret = -EINVAL;
  		goto streamon_err1;
  	}
  	addr = (unsigned long) vout->queued_buf_addr[vout->cur_frm->i]
  		+ vout->cropped_offset;
  
  	mask = DISPC_IRQ_VSYNC | DISPC_IRQ_EVSYNC_EVEN | DISPC_IRQ_EVSYNC_ODD
  		| DISPC_IRQ_VSYNC2;
  
  	omap_dispc_register_isr(omap_vout_isr, vout, mask);
  
  	for (j = 0; j < ovid->num_overlays; j++) {
  		struct omap_overlay *ovl = ovid->overlays[j];
  
  		if (ovl->manager && ovl->manager->device) {
  			struct omap_overlay_info info;
  			ovl->get_overlay_info(ovl, &info);
  			info.paddr = addr;
  			if (ovl->set_overlay_info(ovl, &info)) {
  				ret = -EINVAL;
  				goto streamon_err1;
  			}
  		}
  	}
  
  	/* First save the configuration in ovelray structure */
  	ret = omapvid_init(vout, addr);
  	if (ret)
  		v4l2_err(&vout->vid_dev->v4l2_dev,
  				"failed to set overlay info\n");
  	/* Enable the pipeline and set the Go bit */
  	ret = omapvid_apply_changes(vout);
  	if (ret)
  		v4l2_err(&vout->vid_dev->v4l2_dev, "failed to change mode\n");
  
  	for (j = 0; j < ovid->num_overlays; j++) {
  		struct omap_overlay *ovl = ovid->overlays[j];
  
  		if (ovl->manager && ovl->manager->device) {
  			ret = ovl->enable(ovl);
  			if (ret)
  				goto streamon_err1;
  		}
  	}
  
  	ret = 0;
  
  streamon_err1:
  	if (ret)
  		ret = videobuf_streamoff(q);
  streamon_err:
  	mutex_unlock(&vout->lock);
  	return ret;
  }
  
  static int vidioc_streamoff(struct file *file, void *fh, enum v4l2_buf_type i)
  {
  	u32 mask = 0;
  	int ret = 0, j;
  	struct omap_vout_device *vout = fh;
  	struct omapvideo_info *ovid = &vout->vid_info;
  
  	if (!vout->streaming)
  		return -EINVAL;
  
  	vout->streaming = 0;
  	mask = DISPC_IRQ_VSYNC | DISPC_IRQ_EVSYNC_EVEN | DISPC_IRQ_EVSYNC_ODD
  		| DISPC_IRQ_VSYNC2;
  
  	omap_dispc_unregister_isr(omap_vout_isr, vout, mask);
  
  	for (j = 0; j < ovid->num_overlays; j++) {
  		struct omap_overlay *ovl = ovid->overlays[j];
  
  		if (ovl->manager && ovl->manager->device)
  			ovl->disable(ovl);
  	}
  
  	/* Turn of the pipeline */
  	ret = omapvid_apply_changes(vout);
  	if (ret)
  		v4l2_err(&vout->vid_dev->v4l2_dev, "failed to change mode in"
  				" streamoff\n");
  
  	INIT_LIST_HEAD(&vout->dma_queue);
  	ret = videobuf_streamoff(&vout->vbq);
  
  	return ret;
  }
  
  static int vidioc_s_fbuf(struct file *file, void *fh,
  				struct v4l2_framebuffer *a)
  {
  	int enable = 0;
  	struct omap_overlay *ovl;
  	struct omapvideo_info *ovid;
  	struct omap_vout_device *vout = fh;
  	struct omap_overlay_manager_info info;
  	enum omap_dss_trans_key_type key_type = OMAP_DSS_COLOR_KEY_GFX_DST;
  
  	ovid = &vout->vid_info;
  	ovl = ovid->overlays[0];
  
  	/* OMAP DSS doesn't support Source and Destination color
  	   key together */
  	if ((a->flags & V4L2_FBUF_FLAG_SRC_CHROMAKEY) &&
  			(a->flags & V4L2_FBUF_FLAG_CHROMAKEY))
  		return -EINVAL;
  	/* OMAP DSS Doesn't support the Destination color key
  	   and alpha blending together */
  	if ((a->flags & V4L2_FBUF_FLAG_CHROMAKEY) &&
  			(a->flags & V4L2_FBUF_FLAG_LOCAL_ALPHA))
  		return -EINVAL;
  
  	if ((a->flags & V4L2_FBUF_FLAG_SRC_CHROMAKEY)) {
  		vout->fbuf.flags |= V4L2_FBUF_FLAG_SRC_CHROMAKEY;
  		key_type =  OMAP_DSS_COLOR_KEY_VID_SRC;
  	} else
  		vout->fbuf.flags &= ~V4L2_FBUF_FLAG_SRC_CHROMAKEY;
  
  	if ((a->flags & V4L2_FBUF_FLAG_CHROMAKEY)) {
  		vout->fbuf.flags |= V4L2_FBUF_FLAG_CHROMAKEY;
  		key_type =  OMAP_DSS_COLOR_KEY_GFX_DST;
  	} else
  		vout->fbuf.flags &=  ~V4L2_FBUF_FLAG_CHROMAKEY;
  
  	if (a->flags & (V4L2_FBUF_FLAG_CHROMAKEY |
  				V4L2_FBUF_FLAG_SRC_CHROMAKEY))
  		enable = 1;
  	else
  		enable = 0;
  	if (ovl->manager && ovl->manager->get_manager_info &&
  			ovl->manager->set_manager_info) {
  
  		ovl->manager->get_manager_info(ovl->manager, &info);
  		info.trans_enabled = enable;
  		info.trans_key_type = key_type;
  		info.trans_key = vout->win.chromakey;
  
  		if (ovl->manager->set_manager_info(ovl->manager, &info))
  			return -EINVAL;
  	}
  	if (a->flags & V4L2_FBUF_FLAG_LOCAL_ALPHA) {
  		vout->fbuf.flags |= V4L2_FBUF_FLAG_LOCAL_ALPHA;
  		enable = 1;
  	} else {
  		vout->fbuf.flags &= ~V4L2_FBUF_FLAG_LOCAL_ALPHA;
  		enable = 0;
  	}
  	if (ovl->manager && ovl->manager->get_manager_info &&
  			ovl->manager->set_manager_info) {
  		ovl->manager->get_manager_info(ovl->manager, &info);
  		/* enable this only if there is no zorder cap */
  		if ((ovl->caps & OMAP_DSS_OVL_CAP_ZORDER) == 0)
  			info.partial_alpha_enabled = enable;
  		if (ovl->manager->set_manager_info(ovl->manager, &info))
  			return -EINVAL;
  	}
  
  	return 0;
  }
  
  static int vidioc_g_fbuf(struct file *file, void *fh,
  		struct v4l2_framebuffer *a)
  {
  	struct omap_overlay *ovl;
  	struct omapvideo_info *ovid;
  	struct omap_vout_device *vout = fh;
  	struct omap_overlay_manager_info info;
  
  	ovid = &vout->vid_info;
  	ovl = ovid->overlays[0];
  
  	/* The video overlay must stay within the framebuffer and can't be
  	   positioned independently. */
  	a->flags = V4L2_FBUF_FLAG_OVERLAY;
  	a->capability = V4L2_FBUF_CAP_LOCAL_ALPHA | V4L2_FBUF_CAP_CHROMAKEY
  		| V4L2_FBUF_CAP_SRC_CHROMAKEY;
  
  	if (ovl->manager && ovl->manager->get_manager_info) {
  		ovl->manager->get_manager_info(ovl->manager, &info);
  		if (info.trans_key_type == OMAP_DSS_COLOR_KEY_VID_SRC)
  			a->flags |= V4L2_FBUF_FLAG_SRC_CHROMAKEY;
  		if (info.trans_key_type == OMAP_DSS_COLOR_KEY_GFX_DST)
  			a->flags |= V4L2_FBUF_FLAG_CHROMAKEY;
  	}
  	if (ovl->manager && ovl->manager->get_manager_info) {
  		ovl->manager->get_manager_info(ovl->manager, &info);
  		if (info.partial_alpha_enabled)
  			a->flags |= V4L2_FBUF_FLAG_LOCAL_ALPHA;
  	}
  
  	return 0;
  }
  
  static const struct v4l2_ioctl_ops vout_ioctl_ops = {
  	.vidioc_querycap      			= vidioc_querycap,
  	.vidioc_enum_fmt_vid_out 		= vidioc_enum_fmt_vid_out,
  	.vidioc_g_fmt_vid_out			= vidioc_g_fmt_vid_out,
  	.vidioc_try_fmt_vid_out			= vidioc_try_fmt_vid_out,
  	.vidioc_s_fmt_vid_out			= vidioc_s_fmt_vid_out,
  	.vidioc_queryctrl    			= vidioc_queryctrl,
  	.vidioc_g_ctrl       			= vidioc_g_ctrl,
  	.vidioc_s_fbuf				= vidioc_s_fbuf,
  	.vidioc_g_fbuf				= vidioc_g_fbuf,
  	.vidioc_s_ctrl       			= vidioc_s_ctrl,
  	.vidioc_try_fmt_vid_overlay 		= vidioc_try_fmt_vid_overlay,
  	.vidioc_s_fmt_vid_overlay		= vidioc_s_fmt_vid_overlay,
  	.vidioc_enum_fmt_vid_overlay		= vidioc_enum_fmt_vid_overlay,
  	.vidioc_g_fmt_vid_overlay		= vidioc_g_fmt_vid_overlay,
  	.vidioc_cropcap				= vidioc_cropcap,
  	.vidioc_g_crop				= vidioc_g_crop,
  	.vidioc_s_crop				= vidioc_s_crop,
  	.vidioc_reqbufs				= vidioc_reqbufs,
  	.vidioc_querybuf			= vidioc_querybuf,
  	.vidioc_qbuf				= vidioc_qbuf,
  	.vidioc_dqbuf				= vidioc_dqbuf,
  	.vidioc_streamon			= vidioc_streamon,
  	.vidioc_streamoff			= vidioc_streamoff,
  };
  
  static const struct v4l2_file_operations omap_vout_fops = {
  	.owner 		= THIS_MODULE,
  	.poll		= omap_vout_poll,
  	.unlocked_ioctl	= video_ioctl2,
  	.mmap 		= omap_vout_mmap,
  	.open 		= omap_vout_open,
  	.release 	= omap_vout_release,
  };
  
  /* Init functions used during driver initialization */
  /* Initial setup of video_data */
  static int __init omap_vout_setup_video_data(struct omap_vout_device *vout)
  {
  	struct video_device *vfd;
  	struct v4l2_pix_format *pix;
  	struct v4l2_control *control;
  	struct omap_dss_device *display =
  		vout->vid_info.overlays[0]->manager->device;
  
  	/* set the default pix */
  	pix = &vout->pix;
  
  	/* Set the default picture of QVGA  */
  	pix->width = QQVGA_WIDTH;
  	pix->height = QQVGA_HEIGHT;
  
  	/* Default pixel format is RGB 5-6-5 */
  	pix->pixelformat = V4L2_PIX_FMT_RGB565;
  	pix->field = V4L2_FIELD_ANY;
  	pix->bytesperline = pix->width * 2;
  	pix->sizeimage = pix->bytesperline * pix->height;
  	pix->priv = 0;
  	pix->colorspace = V4L2_COLORSPACE_JPEG;
  
  	vout->bpp = RGB565_BPP;
  	vout->fbuf.fmt.width  =  display->panel.timings.x_res;
  	vout->fbuf.fmt.height =  display->panel.timings.y_res;
  
  	/* Set the data structures for the overlay parameters*/
  	vout->win.global_alpha = 255;
  	vout->fbuf.flags = 0;
  	vout->fbuf.capability = V4L2_FBUF_CAP_LOCAL_ALPHA |
  		V4L2_FBUF_CAP_SRC_CHROMAKEY | V4L2_FBUF_CAP_CHROMAKEY;
  	vout->win.chromakey = 0;
  
  	omap_vout_new_format(pix, &vout->fbuf, &vout->crop, &vout->win);
  
  	/*Initialize the control variables for
  	  rotation, flipping and background color. */
  	control = vout->control;
  	control[0].id = V4L2_CID_ROTATE;
  	control[0].value = 0;
  	vout->rotation = 0;
  	vout->mirror = 0;
  	vout->control[2].id = V4L2_CID_HFLIP;
  	vout->control[2].value = 0;
  	if (vout->vid_info.rotation_type == VOUT_ROT_VRFB)
  		vout->vrfb_bpp = 2;
  
  	control[1].id = V4L2_CID_BG_COLOR;
  	control[1].value = 0;
  
  	/* initialize the video_device struct */
  	vfd = vout->vfd = video_device_alloc();
  
  	if (!vfd) {
  		printk(KERN_ERR VOUT_NAME ": could not allocate"
  				" video device struct\n");
  		return -ENOMEM;
  	}
  	vfd->release = video_device_release;
  	vfd->ioctl_ops = &vout_ioctl_ops;
  
  	strlcpy(vfd->name, VOUT_NAME, sizeof(vfd->name));
  
  	vfd->fops = &omap_vout_fops;
  	vfd->v4l2_dev = &vout->vid_dev->v4l2_dev;
  	mutex_init(&vout->lock);
  
  	vfd->minor = -1;
  	return 0;
  
  }
  
  /* Setup video buffers */
  static int __init omap_vout_setup_video_bufs(struct platform_device *pdev,
  		int vid_num)
  {
  	u32 numbuffers;
  	int ret = 0, i;
  	struct omapvideo_info *ovid;
  	struct omap_vout_device *vout;
  	struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
  	struct omap2video_device *vid_dev =
  		container_of(v4l2_dev, struct omap2video_device, v4l2_dev);
  
  	vout = vid_dev->vouts[vid_num];
  	ovid = &vout->vid_info;
  
  	numbuffers = (vid_num == 0) ? video1_numbuffers : video2_numbuffers;
  	vout->buffer_size = (vid_num == 0) ? video1_bufsize : video2_bufsize;
  	dev_info(&pdev->dev, "Buffer Size = %d\n", vout->buffer_size);
  
  	for (i = 0; i < numbuffers; i++) {
  		vout->buf_virt_addr[i] =
  			omap_vout_alloc_buffer(vout->buffer_size,
  					(u32 *) &vout->buf_phy_addr[i]);
  		if (!vout->buf_virt_addr[i]) {
  			numbuffers = i;
  			ret = -ENOMEM;
  			goto free_buffers;
  		}
  	}
  
  	vout->cropped_offset = 0;
  
  	if (ovid->rotation_type == VOUT_ROT_VRFB) {
  		int static_vrfb_allocation = (vid_num == 0) ?
  			vid1_static_vrfb_alloc : vid2_static_vrfb_alloc;
  		ret = omap_vout_setup_vrfb_bufs(pdev, vid_num,
  				static_vrfb_allocation);
  	}
  
  	return ret;
  
  free_buffers:
  	for (i = 0; i < numbuffers; i++) {
  		omap_vout_free_buffer(vout->buf_virt_addr[i],
  						vout->buffer_size);
  		vout->buf_virt_addr[i] = 0;
  		vout->buf_phy_addr[i] = 0;
  	}
  	return ret;
  
  }
  
  /* Create video out devices */
  static int __init omap_vout_create_video_devices(struct platform_device *pdev)
  {
  	int ret = 0, k;
  	struct omap_vout_device *vout;
  	struct video_device *vfd = NULL;
  	struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
  	struct omap2video_device *vid_dev = container_of(v4l2_dev,
  			struct omap2video_device, v4l2_dev);
  
  	for (k = 0; k < pdev->num_resources; k++) {
  
  		vout = kzalloc(sizeof(struct omap_vout_device), GFP_KERNEL);
  		if (!vout) {
  			dev_err(&pdev->dev, ": could not allocate memory\n");
  			return -ENOMEM;
  		}
  
  		vout->vid = k;
  		vid_dev->vouts[k] = vout;
  		vout->vid_dev = vid_dev;
  		/* Select video2 if only 1 overlay is controlled by V4L2 */
  		if (pdev->num_resources == 1)
  			vout->vid_info.overlays[0] = vid_dev->overlays[k + 2];
  		else
  			/* Else select video1 and video2 one by one. */
  			vout->vid_info.overlays[0] = vid_dev->overlays[k + 1];
  		vout->vid_info.num_overlays = 1;
  		vout->vid_info.id = k + 1;
  
  		/* Set VRFB as rotation_type for omap2 and omap3 */
  		if (cpu_is_omap24xx() || cpu_is_omap34xx())
  			vout->vid_info.rotation_type = VOUT_ROT_VRFB;
  
  		/* Setup the default configuration for the video devices
  		 */
  		if (omap_vout_setup_video_data(vout) != 0) {
  			ret = -ENOMEM;
  			goto error;
  		}
  
  		/* Allocate default number of buffers for the video streaming
  		 * and reserve the VRFB space for rotation
  		 */
  		if (omap_vout_setup_video_bufs(pdev, k) != 0) {
  			ret = -ENOMEM;
  			goto error1;
  		}
  
  		/* Register the Video device with V4L2
  		 */
  		vfd = vout->vfd;
  		if (video_register_device(vfd, VFL_TYPE_GRABBER, -1) < 0) {
  			dev_err(&pdev->dev, ": Could not register "
  					"Video for Linux device\n");
  			vfd->minor = -1;
  			ret = -ENODEV;
  			goto error2;
  		}
  		video_set_drvdata(vfd, vout);
  
  		/* Configure the overlay structure */
  		ret = omapvid_init(vid_dev->vouts[k], 0);
  		if (!ret)
  			goto success;
  
  error2:
  		if (vout->vid_info.rotation_type == VOUT_ROT_VRFB)
  			omap_vout_release_vrfb(vout);
  		omap_vout_free_buffers(vout);
  error1:
  		video_device_release(vfd);
  error:
  		kfree(vout);
  		return ret;
  
  success:
  		dev_info(&pdev->dev, ": registered and initialized"
  				" video device %d\n", vfd->minor);
  		if (k == (pdev->num_resources - 1))
  			return 0;
  	}
  
  	return -ENODEV;
  }
  /* Driver functions */
  static void omap_vout_cleanup_device(struct omap_vout_device *vout)
  {
  	struct video_device *vfd;
  	struct omapvideo_info *ovid;
  
  	if (!vout)
  		return;
  
  	vfd = vout->vfd;
  	ovid = &vout->vid_info;
  	if (vfd) {
  		if (!video_is_registered(vfd)) {
  			/*
  			 * The device was never registered, so release the
  			 * video_device struct directly.
  			 */
  			video_device_release(vfd);
  		} else {
  			/*
  			 * The unregister function will release the video_device
  			 * struct as well as unregistering it.
  			 */
  			video_unregister_device(vfd);
  		}
  	}
  	if (ovid->rotation_type == VOUT_ROT_VRFB) {
  		omap_vout_release_vrfb(vout);
  		/* Free the VRFB buffer if allocated
  		 * init time
  		 */
  		if (vout->vrfb_static_allocation)
  			omap_vout_free_vrfb_buffers(vout);
  	}
  	omap_vout_free_buffers(vout);
  
  	kfree(vout);
  }
  
  static int omap_vout_remove(struct platform_device *pdev)
  {
  	int k;
  	struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
  	struct omap2video_device *vid_dev = container_of(v4l2_dev, struct
  			omap2video_device, v4l2_dev);
  
  	v4l2_device_unregister(v4l2_dev);
  	for (k = 0; k < pdev->num_resources; k++)
  		omap_vout_cleanup_device(vid_dev->vouts[k]);
  
  	for (k = 0; k < vid_dev->num_displays; k++) {
  		if (vid_dev->displays[k]->state != OMAP_DSS_DISPLAY_DISABLED)
  			vid_dev->displays[k]->driver->disable(vid_dev->displays[k]);
  
  		omap_dss_put_device(vid_dev->displays[k]);
  	}
  	kfree(vid_dev);
  	return 0;
  }
  
  static int __init omap_vout_probe(struct platform_device *pdev)
  {
  	int ret = 0, i;
  	struct omap_overlay *ovl;
  	struct omap_dss_device *dssdev = NULL;
  	struct omap_dss_device *def_display;
  	struct omap2video_device *vid_dev = NULL;
  
  	if (pdev->num_resources == 0) {
  		dev_err(&pdev->dev, "probed for an unknown device\n");
  		return -ENODEV;
  	}
  
  	vid_dev = kzalloc(sizeof(struct omap2video_device), GFP_KERNEL);
  	if (vid_dev == NULL)
  		return -ENOMEM;
  
  	vid_dev->num_displays = 0;
  	for_each_dss_dev(dssdev) {
  		omap_dss_get_device(dssdev);
  
  		if (!dssdev->driver) {
  			dev_warn(&pdev->dev, "no driver for display: %s\n",
  					dssdev->name);
  			omap_dss_put_device(dssdev);
  			continue;
  		}
  
  		vid_dev->displays[vid_dev->num_displays++] = dssdev;
  	}
  
  	if (vid_dev->num_displays == 0) {
  		dev_err(&pdev->dev, "no displays\n");
  		ret = -EINVAL;
  		goto probe_err0;
  	}
  
  	vid_dev->num_overlays = omap_dss_get_num_overlays();
  	for (i = 0; i < vid_dev->num_overlays; i++)
  		vid_dev->overlays[i] = omap_dss_get_overlay(i);
  
  	vid_dev->num_managers = omap_dss_get_num_overlay_managers();
  	for (i = 0; i < vid_dev->num_managers; i++)
  		vid_dev->managers[i] = omap_dss_get_overlay_manager(i);
  
  	/* Get the Video1 overlay and video2 overlay.
  	 * Setup the Display attached to that overlays
  	 */
  	for (i = 1; i < vid_dev->num_overlays; i++) {
  		ovl = omap_dss_get_overlay(i);
  		if (ovl->manager && ovl->manager->device) {
  			def_display = ovl->manager->device;
  		} else {
  			dev_warn(&pdev->dev, "cannot find display\n");
  			def_display = NULL;
  		}
  		if (def_display) {
  			struct omap_dss_driver *dssdrv = def_display->driver;
  
  			ret = dssdrv->enable(def_display);
  			if (ret) {
  				/* Here we are not considering a error
  				 *  as display may be enabled by frame
  				 *  buffer driver
  				 */
  				dev_warn(&pdev->dev,
  					"'%s' Display already enabled\n",
  					def_display->name);
  			}
  		}
  	}
  
  	if (v4l2_device_register(&pdev->dev, &vid_dev->v4l2_dev) < 0) {
  		dev_err(&pdev->dev, "v4l2_device_register failed\n");
  		ret = -ENODEV;
  		goto probe_err1;
  	}
  
  	ret = omap_vout_create_video_devices(pdev);
  	if (ret)
  		goto probe_err2;
  
  	for (i = 0; i < vid_dev->num_displays; i++) {
  		struct omap_dss_device *display = vid_dev->displays[i];
  
  		if (display->driver->update)
  			display->driver->update(display, 0, 0,
  					display->panel.timings.x_res,
  					display->panel.timings.y_res);
  	}
  	return 0;
  
  probe_err2:
  	v4l2_device_unregister(&vid_dev->v4l2_dev);
  probe_err1:
  	for (i = 1; i < vid_dev->num_overlays; i++) {
  		def_display = NULL;
  		ovl = omap_dss_get_overlay(i);
  		if (ovl->manager && ovl->manager->device)
  			def_display = ovl->manager->device;
  
  		if (def_display && def_display->driver)
  			def_display->driver->disable(def_display);
  	}
  probe_err0:
  	kfree(vid_dev);
  	return ret;
  }
  
  static struct platform_driver omap_vout_driver = {
  	.driver = {
  		.name = VOUT_NAME,
  	},
  	.remove = omap_vout_remove,
  };
  
  static int __init omap_vout_init(void)
  {
  	if (platform_driver_probe(&omap_vout_driver, omap_vout_probe) != 0) {
  		printk(KERN_ERR VOUT_NAME ":Could not register Video driver\n");
  		return -EINVAL;
  	}
  	return 0;
  }
  
  static void omap_vout_cleanup(void)
  {
  	platform_driver_unregister(&omap_vout_driver);
  }
  
  late_initcall(omap_vout_init);
  module_exit(omap_vout_cleanup);
  