> -----Original Message-----
> From: Alexey Klimov [mailto:klimov.li...@gmail.com]
> Sent: Friday, March 20, 2009 6:02 PM
> To: Shah, Hardik
> Cc: linux-media@vger.kernel.org; linux-o...@vger.kernel.org; Jadav, Brijesh R;
> Hiremath, Vaibhav
> Subject: Re: [PATCH 3/3] V4L2 Driver for OMAP3/3 DSS.
>
> <snip>
>
> Hello again,
> my previous message due to bad connection was send with no end.
> Sorry about that.
>
> > + vout->vid = k;
> > + vid_dev->vouts[k] = vout;
> > + vout->vid_info.vid_dev = vid_dev;
> > + vout->vid_info.overlays[0] = vid_dev->overlays[k + 1];
> > + vout->vid_info.num_overlays = 1;
> > + vout->vid_info.id = k + 1;
> > + vid_dev->num_videos++;
> > +
> > + /* Setup the default configuration for the video devices
> > + */
> > + if (omap_vout_setup_video_data(vout) != 0) {
> > + r = -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) {
> > + r = -ENOMEM;
> > + goto error1;
> > + }
> > +
> > + /* Register the Video device with V4L2
> > + */
> > + vfd = vout->vfd;
> > + if (video_register_device(vfd, VFL_TYPE_GRABBER, k + 1) < 0)
> {
> > + printk(KERN_ERR VOUT_NAME ": could not register \
> > + Video for Linux device\n");
> > + vfd->minor = -1;
> > + r = -ENODEV;
> > + goto error2;
> > + }
> > +
> > + if (k == 0)
> > + saved_v1out = vout;
> > + else
> > + saved_v2out = vout;
> > +
> > + r = omapvid_apply_changes(vid_dev->vouts[k], 0, 1);
> > +
> > + if (r)
> > + goto error2;
> > + else
> > + goto success;
> > +error2:
> > + omap_vout_release_vrfb(vout);
> > + omap_vout_free_buffers(vout);
> > +error1:
> > + video_device_release(vfd);
> > +error:
> > + kfree(vout);
> > + return r;
> > +
> > +success:
> > + printk(KERN_INFO VOUT_NAME ": registered and initialized\
> > + video device %d [v4l2]\n", vfd->minor);
> > + if (k == (pdev->num_resources - 1))
> > + return 0;
> > + }
> > + return -ENODEV;
> > +
> > +}
> > +
> > +int omapvid_apply_changes(struct omap_vout_device *vout, u32 addr, int
> init)
> > +{
> > + int r = 0;
> > + struct omapvideo_info *ovid = &(vout->vid_info);
> > + struct omap_overlay *ovl;
> > + int posx, posy;
> > + int outw, outh, temp, rotation;
> > + int i;
> > + struct v4l2_window *win;
> > + struct omap_video_timings *timing;
> > + struct omap_display *cur_display;
> > +
> > + win = &vout->win;
> > + rotation = vout->rotation;
> > + for (i = 0; i < ovid->num_overlays; i++) {
> > + ovl = ovid->overlays[i];
> > + if (!ovl->manager || !ovl->manager->display)
> > + return -EINVAL;
> > +
> > + timing = &ovl->manager->display->panel->timings;
> > + cur_display = ovl->manager->display;
> > +
> > + if (init || (ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
> > + outw = win->w.width;
> > + outh = win->w.height;
> > +
> > + } else {
> > + outw = win->w.width;
> > + outh = win->w.height;
> > + }
> > + if (init) {
> > + posx = 0;
> > + posy = 0;
> > + } else {
> > + switch (rotation) {
> > +
> > + case 1:
> > + /* Invert the height and widht 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 2:
> > + posx = (timing->x_res - win->w.width) -
> > + win->w.left;
> > + posy = (timing->y_res - win->w.height) -
> > + win->w.top;
> > + break;
> > +
> > + case 3:
> > + 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;
> > + }
> > + }
> > +
> > + if (cur_display->type == OMAP_DISPLAY_TYPE_VENC)
> > + posy = posy/2;
> > +
> > + r = omapvid_setup_overlay(vout, ovl, posx, posy, outw,
> > + outh, addr, vout->tv_field1_offset, init);
> > + if (r)
> > + goto err;
> > +
> > + if (!init && ovl->manager)
> > + ovl->manager->apply(ovl->manager);
> > +
> > + }
> > + return 0;
> > +err:
> > + printk(KERN_WARNING "apply_changes failed\n");
>
> Module name here ?
>
> > + return r;
> > +}
> > +
> > +int omapvid_setup_overlay(struct omap_vout_device *vout,
> > + struct omap_overlay *ovl, int posx, int posy, int outw,
> > + int outh, u32 addr, int tv_field1_offset, int init)
> > +{
> > + int r = 0;
> > + enum omap_color_mode mode = 0;
> > + int rotation, mirror;
> > + int cropheight, cropwidth, pixheight, pixwidth;
> > + struct omap_overlay_info info;
> > +
> > + if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0 &&
> > + (outw != vout->pix.width || outh != vout-
> >pix.height)) {
> > + r = -EINVAL;
> > + goto err;
> > + }
> > +
> > + mode = video_mode_to_dss_mode(vout);
> > +
> > + if (mode == -EINVAL) {
> > + r = -EINVAL;
> > + goto err;
> > + }
> > +
> > + rotation = vout->rotation;
> > + mirror = 0;
> > +
> > + /* Setup the input plane parameters according to
> > + * rotation value selected.
> > + */
> > + if (rotation == 1 || rotation == 3) {
> > + 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.vaddr = NULL;
> > + if (vout->rotation >= 0)
> > + info.screen_width = 2048;
> > + else
> > + info.screen_width = pixwidth;
> > + info.width = cropwidth;
> > + info.height = cropheight;
> > + info.color_mode = mode;
> > + info.rotation = rotation;
> > + info.mirror = mirror;
> > + info.pos_x = posx;
> > + info.pos_y = posy;
> > + info.out_width = outw;
> > + info.out_height = outh;
> > + info.rotation = 0;
> > + info.mirror = 0;
> > + info.global_alpha = vout->win.global_alpha;
> > +
> > + r = ovl->set_overlay_info(ovl, &info);
> > + if (r)
> > + goto err;
> > +
> > + return 0;
> > +err:
> > + printk(KERN_WARNING "setup_overlay failed\n");
>
> Module name ?
>
> > + return r;
> > +}
> > +
> > +static enum omap_color_mode video_mode_to_dss_mode(struct omap_vout_device
> > + *vout)
> > +{
> > + struct v4l2_pix_format *pix = &vout->pix;
> > + switch (pix->pixelformat) {
> > +
> > + case 0:
> > + break;
> > + case V4L2_PIX_FMT_YUYV:
> > + return OMAP_DSS_COLOR_YUV2;
> > +
> > + case V4L2_PIX_FMT_UYVY:
> > + return OMAP_DSS_COLOR_UYVY;
> > +
> > + case V4L2_PIX_FMT_RGB565:
> > + return OMAP_DSS_COLOR_RGB16;
> > +
> > + case V4L2_PIX_FMT_RGB24:
> > + return OMAP_DSS_COLOR_RGB24P;
> > +
> > + case V4L2_PIX_FMT_RGB32:
> > + {
> > + if (vout->vid == OMAP_VIDEO1)
> > + return OMAP_DSS_COLOR_RGB24U;
> > + else
> > + return OMAP_DSS_COLOR_ARGB32;
> > + }
> > + case V4L2_PIX_FMT_BGR32:
> > + return OMAP_DSS_COLOR_RGBX32;
> > +
> > + default:
> > + return -EINVAL;
> > + }
> > + return -EINVAL;
> > +}
> > +
> > +static struct platform_driver omap_vout_driver = {
> > + .driver = {
> > + .name = VOUT_NAME,
> > + },
> > + .probe = omap_vout_probe,
> > + .remove = omap_vout_remove,
> > +};
> > +
> > +void omap_vout_isr(void *arg, unsigned int irqstatus)
> > +{
> > + int r;
> > + struct timeval timevalue;
> > + struct omap_vout_device *vout =
> > + (struct omap_vout_device *) arg;
> > + u32 addr, fid;
> > + struct omapvideo_info *ovid;
> > + struct omap_overlay *ovl;
> > + struct omap_display *cur_display;
> > +
> > + 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->display)
> > + return;
> > + cur_display = ovl->manager->display;
> > +
> > + spin_lock(&vout->vbq_lock);
> > + do_gettimeofday(&timevalue);
> > + if (cur_display->type == OMAP_DISPLAY_TYPE_DPI) {
> > + if (!(irqstatus & DISPC_IRQ_VSYNC))
> > + return;
> > + if (!vout->first_int && (vout->curFrm != vout->nextFrm)) {
> > + vout->curFrm->ts = timevalue;
> > + vout->curFrm->state = VIDEOBUF_DONE;
> > + wake_up_interruptible(&vout->curFrm->done);
> > + vout->curFrm = vout->nextFrm;
> > + }
> > + vout->first_int = 0;
> > + if (list_empty(&vout->dma_queue)) {
> > + spin_unlock(&vout->vbq_lock);
> > + return;
> > + }
> > +
> > + vout->nextFrm = list_entry(vout->dma_queue.next,
> > + struct videobuf_buffer, queue);
> > + list_del(&vout->nextFrm->queue);
> > +
> > + vout->nextFrm->state = VIDEOBUF_ACTIVE;
> > +
> > + addr = (unsigned long) vout->queued_buf_addr[vout->nextFrm-
> >i] +
> > + vout->cropped_offset ;
> > +
> > + r = omapvid_apply_changes(vout, addr, 0);
> > + if (r)
> > + printk(KERN_ERR VOUT_NAME "failed to change
> mode\n");
> > + } else {
> > + if (vout->first_int) {
> > + vout->first_int = 0;
> > + spin_unlock(&vout->vbq_lock);
> > + return;
> > + }
> > + if (irqstatus & DISPC_IRQ_EVSYNC_ODD) {
> > + fid = 1;
> > + } else if (irqstatus & DISPC_IRQ_EVSYNC_EVEN) {
> > + fid = 0;
> > + } else {
> > + spin_unlock(&vout->vbq_lock);
> > + return;
> > + }
> > + vout->field_id ^= 1;
> > + if (fid != vout->field_id) {
> > + if (0 == fid)
> > + vout->field_id = fid;
> > +
> > + spin_unlock(&vout->vbq_lock);
> > + return;
> > + }
> > + if (0 == fid) {
> > + if (vout->curFrm == vout->nextFrm) {
> > + spin_unlock(&vout->vbq_lock);
> > + return;
> > + }
> > + vout->curFrm->ts = timevalue;
> > + vout->curFrm->state = VIDEOBUF_DONE;
> > + wake_up_interruptible(&vout->curFrm->done);
> > + vout->curFrm = vout->nextFrm;
> > + } else if (1 == fid) {
> > + if (list_empty(&vout->dma_queue) ||
> > + (vout->curFrm != vout->nextFrm)) {
> > + spin_unlock(&vout->vbq_lock);
> > + return;
> > + }
> > + vout->nextFrm = list_entry(vout->dma_queue.next,
> > + struct videobuf_buffer, queue);
> > + list_del(&vout->nextFrm->queue);
> > +
> > + vout->nextFrm->state = VIDEOBUF_ACTIVE;
> > + addr = (unsigned long)
> > + vout->queued_buf_addr[vout->nextFrm->i] +
> > + vout->cropped_offset ;
> > + r = omapvid_apply_changes(vout, addr, 0);
> > + if (r)
> > + printk(KERN_ERR VOUT_NAME "failed to\
> > + change mode\n");
> > + }
> > +
> > + }
> > + spin_unlock(&vout->vbq_lock);
> > +}
> > +
> > +static void omap_vout_cleanup_device(struct omap_vout_device *vout)
> > +{
> > +
> > + struct video_device *vfd;
> > +
> > + if (!vout)
> > + return;
> > + vfd = vout->vfd;
> > +
> > + if (vfd) {
> > + if (vfd->minor == -1) {
> > + /*
> > + * 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);
> > + }
> > + }
> > +
> > + omap_vout_release_vrfb(vout);
> > +
> > + omap_vout_free_buffers(vout);
> > +
> > + kfree(vout);
> > +
> > + if (!(vout->vid))
> > + saved_v1out = NULL;
> > + else
> > + saved_v2out = NULL;
> > +}
> > +
> > +static int __init omap_vout_init(void)
> > +{
> > +
> > + if (platform_driver_register(&omap_vout_driver) != 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);
> > +}
> > +
> > +MODULE_AUTHOR("Texas Instruments.");
> > +MODULE_DESCRIPTION("OMAP Video for Linux Video out driver");
> > +MODULE_LICENSE("GPL");
> > +
> > +late_initcall(omap_vout_init);
> > +module_exit(omap_vout_cleanup);
> > diff --git a/drivers/media/video/omap/omap_voutdef.h
> b/drivers/media/video/omap/omap_voutdef.h
> > new file mode 100644
> > index 0000000..d9bbc10
> > --- /dev/null
> > +++ b/drivers/media/video/omap/omap_voutdef.h
> > @@ -0,0 +1,137 @@
> > +/*
> > + * drivers/media/video/omap/omap_voutdef.h
> > + *
> > + * Copyright (C) 2005 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.
> > + */
> > +
> > +#ifndef OMAP_VOUTDEF_H
> > +#define OMAP_VOUTDEF_H
> > +
> > +#include <mach/display.h>
> > +
> > +#define YUYV_BPP 2
> > +#define RGB565_BPP 2
> > +#define RGB24_BPP 3
> > +#define RGB32_BPP 4
> > +#define TILE_SIZE 32
> > +#define YUYV_VRFB_BPP 2
> > +#define RGB_VRFB_BPP 1
> > +#define MAX_CID 3
> > +
> > +
> > +/*
> > + * This structure is used to store the DMA transfer parameters
> > + * for VRFB hidden buffer
> > + */
> > +struct vid_vrfb_dma {
> > + int dev_id;
> > + int dma_ch;
> > + int req_status;
> > + int tx_status;
> > + wait_queue_head_t wait;
> > +};
> > +
> > +struct omapvideo_info {
> > + int id;
> > + int num_overlays;
> > + struct omap_overlay *overlays[3];
> > + struct omap2video_device *vid_dev;
> > +};
> > +
> > +struct omap2video_device {
> > + struct device *dev;
> > + struct mutex mtx;
> > +
> > + int state;
> > +
> > + int num_videos;
> > + struct omap_vout_device *vouts[10];
> > +
> > + int num_displays;
> > + struct omap_display *displays[10];
> > + int num_overlays;
> > + struct omap_overlay *overlays[10];
> > + int num_managers;
> > + struct omap_overlay_manager *managers[10];
> > +};
> > +
> > +/* per-device data structure */
> > +struct omap_vout_device {
> > +
> > + struct omapvideo_info vid_info;
> > + struct device dev;
> > + struct video_device *vfd;
> > + int vid;
> > + int opened;
> > +
> > + /* we don't allow to change image fmt/size once buffer has
> > + * been allocated
> > + */
> > + int buffer_allocated;
> > + /* allow to reuse previosuly allocated buffer which is big enough */
> > + int buffer_size;
> > + /* keep buffer info accross opens */
> > + unsigned long buf_virt_addr[VIDEO_MAX_FRAME];
> > + unsigned long buf_phy_addr[VIDEO_MAX_FRAME];
> > +
> > + /* we don't allow to request new buffer when old buffers are
> > + * still mmaped
> > + */
> > + int mmap_count;
> > +
> > + spinlock_t vbq_lock; /* spinlock for videobuf queues */
> > + unsigned long field_count; /* field counter for videobuf_buffer
> */
> > +
> > + /* non-NULL means streaming is in progress. */
> > + struct omap_vout_fh *streaming;
> > +
> > + struct v4l2_pix_format pix;
> > + struct v4l2_rect crop;
> > + struct v4l2_window win;
> > + struct v4l2_framebuffer fbuf;
> > +
> > + /* Lock to protect the shared data structures in ioctl */
> > + struct semaphore lock;
> > +
> > +
> > + /* V4L2 control structure for different control id */
> > + struct v4l2_control control[MAX_CID];
> > + int rotation;
> > + int mirror;
> > + int flicker_filter;
> > + /* V4L2 control structure for different control id */
> > +
> > + int bpp; /* bytes per pixel */
> > + int vrfb_bpp; /* bytes per pixel with respect to VRFB */
> > +
> > + struct vid_vrfb_dma vrfb_dma_tx;
> > + unsigned int smsshado_phy_addr[4];
> > + unsigned int smsshado_virt_addr[4];
> > + struct vrfb vrfb_context[4];
> > + unsigned int smsshado_size;
> > + unsigned char pos;
> > +
> > + int ps, vr_ps, line_length, first_int, field_id;
> > + enum v4l2_memory memory;
> > + struct videobuf_buffer *curFrm, *nextFrm;
> > + struct list_head dma_queue;
> > + u8 *queued_buf_addr[32];
> > + u32 cropped_offset;
> > + s32 tv_field1_offset;
> > + void *isr_handle;
> > +
> > +};
> > +
> > +/* per-filehandle data structure */
> > +struct omap_vout_fh {
> > + struct omap_vout_device *vout;
> > + enum v4l2_buf_type type;
> > + struct videobuf_queue vbq;
> > + int io_allowed;
> > +};
> > +
> > +#endif /* ifndef OMAP_VOUTDEF_H */
> > diff --git a/drivers/media/video/omap/omap_voutlib.c
> b/drivers/media/video/omap/omap_voutlib.c
> > new file mode 100644
> > index 0000000..c51a413
> > --- /dev/null
> > +++ b/drivers/media/video/omap/omap_voutlib.c
> > @@ -0,0 +1,281 @@
> > +/*
> > + * drivers/media/video/omap/omap_voutlib.c
> > + *
> > + * Copyright (C) 2008 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.
> > + *
> > + * Based on the OMAP2 camera driver
> > + * Video-for-Linux (Version 2) camera capture driver for
> > + * the OMAP24xx camera controller.
> > + *
> > + * Author: Andy Lowe (sou...@mvista.com)
> > + *
> > + * Copyright (C) 2004 MontaVista Software, Inc.
> > + * Copyright (C) 2004 Texas Instruments.
> > + *
> > + */
> > +
> > +#include <linux/init.h>
> > +#include <linux/module.h>
> > +#include <linux/delay.h>
> > +#include <linux/errno.h>
> > +#include <linux/kernel.h>
> > +#include <linux/vmalloc.h>
> > +#include <linux/slab.h>
> > +#include <linux/sched.h>
> > +#include <linux/smp_lock.h>
> > +#include <linux/kdev_t.h>
> > +#include <linux/types.h>
> > +#include <linux/wait.h>
> > +#include <linux/videodev2.h>
> > +#include <linux/semaphore.h>
> > +
> > +/* Return the default overlay cropping rectangle in crop given the image
> > + * size in pix and the video display size in fbuf. The default
> > + * cropping rectangle is the largest rectangle no larger than the capture
> size
> > + * that will fit on the display. The default cropping rectangle is
> centered in
> > + * the image. All dimensions and offsets are rounded down to even numbers.
> > + */
> > +void omap_vout_default_crop(struct v4l2_pix_format *pix,
> > + struct v4l2_framebuffer *fbuf, struct v4l2_rect *crop)
> > +{
> > + crop->width = (pix->width < fbuf->fmt.width) ?
> > + pix->width : fbuf->fmt.width;
> > + crop->height = (pix->height < fbuf->fmt.height) ?
> > + pix->height : fbuf->fmt.height;
> > + crop->width &= ~1;
> > + crop->height &= ~1;
> > + crop->left = ((pix->width - crop->width) >> 1) & ~1;
> > + crop->top = ((pix->height - crop->height) >> 1) & ~1;
> > +}
> > +EXPORT_SYMBOL_GPL(omap_vout_default_crop);
> > +/* Given a new render window in new_win, adjust the window to the
> > + * nearest supported configuration. The adjusted window parameters are
> > + * returned in new_win.
> > + * Returns zero if succesful, or -EINVAL if the requested window is
> > + * impossible and cannot reasonably be adjusted.
> > + */
> > +int omap_vout_try_window(struct v4l2_framebuffer *fbuf,
> > + struct v4l2_window *new_win)
> > +{
> > + struct v4l2_rect try_win;
> > +
> > + /* make a working copy of the new_win rectangle */
> > + try_win = new_win->w;
> > +
> > + /* adjust the preview window so it fits on the display by clipping
> any
> > + * offscreen areas
> > + */
> > + if (try_win.left < 0) {
> > + try_win.width += try_win.left;
> > + try_win.left = 0;
> > + }
> > + if (try_win.top < 0) {
> > + try_win.height += try_win.top;
> > + try_win.top = 0;
> > + }
> > + try_win.width = (try_win.width < fbuf->fmt.width) ?
> > + try_win.width : fbuf->fmt.width;
> > + try_win.height = (try_win.height < fbuf->fmt.height) ?
> > + try_win.height : fbuf->fmt.height;
> > + if (try_win.left + try_win.width > fbuf->fmt.width)
> > + try_win.width = fbuf->fmt.width - try_win.left;
> > + if (try_win.top + try_win.height > fbuf->fmt.height)
> > + try_win.height = fbuf->fmt.height - try_win.top;
> > + try_win.width &= ~1;
> > + try_win.height &= ~1;
> > +
> > + if (try_win.width <= 0 || try_win.height <= 0)
> > + return -EINVAL;
> > +
> > + /* We now have a valid preview window, so go with it */
> > + new_win->w = try_win;
> > + new_win->field = /*V4L2_FIELD_NONE*/V4L2_FIELD_ANY;
> > + return 0;
> > +}
> > +EXPORT_SYMBOL_GPL(omap_vout_try_window);
> > +
> > +/* Given a new render window in new_win, adjust the window to the
> > + * nearest supported configuration. The image cropping window in crop
> > + * will also be adjusted if necessary. Preference is given to keeping the
> > + * the window as close to the requested configuration as possible. If
> > + * successful, new_win, vout->win, and crop are updated.
> > + * Returns zero if succesful, or -EINVAL if the requested preview window is
> > + * impossible and cannot reasonably be adjusted.
> > + */
> > +int omap_vout_new_window(struct v4l2_rect *crop,
> > + struct v4l2_window *win, struct v4l2_framebuffer *fbuf,
> > + struct v4l2_window *new_win)
> > +{
> > + int err;
> > +
> > + err = omap_vout_try_window(fbuf, new_win);
> > + if (err)
> > + return err;
> > +
> > + /* update our preview window */
> > + win->w = new_win->w;
> > + win->field = new_win->field;
> > + win->chromakey = new_win->chromakey;
> > +
> > + /* adjust the cropping window to allow for resizing limitations */
> > + if ((crop->height/win->w.height) >= 2) {
> > + /* The maximum vertical downsizing ratio is 2:1 */
> > + crop->height = win->w.height * 2;
> > + }
> > + if ((crop->width/win->w.width) >= 2) {
> > + /* The maximum horizontal downsizing ratio is 2:1 */
> > + crop->width = win->w.width * 2;
> > + }
> > + if (crop->width > 768) {
> > + /* The OMAP2420 vertical resizing line buffer is 768 pixels
> > + * wide. If the cropped image is wider than 768 pixels then
> it
> > + * cannot be vertically resized.
> > + */
> > + if (crop->height != win->w.height)
> > + crop->width = 768;
> > + }
> > + return 0;
> > +}
> > +EXPORT_SYMBOL_GPL(omap_vout_new_window);
> > +
> > +/* Given a new cropping rectangle in new_crop, adjust the cropping
> rectangle to
> > + * the nearest supported configuration. The image render window in win
> will
> > + * also be adjusted if necessary. The preview window is adjusted such that
> the
> > + * horizontal and vertical rescaling ratios stay constant. If the render
> > + * window would fall outside the display boundaries, the cropping rectangle
> > + * will also be adjusted to maintain the rescaling ratios. If successful,
> crop
> > + * and win are updated.
> > + * Returns zero if succesful, or -EINVAL if the requested cropping
> rectangle is
> > + * impossible and cannot reasonably be adjusted.
> > + */
> > +int omap_vout_new_crop(struct v4l2_pix_format *pix,
> > + struct v4l2_rect *crop, struct v4l2_window *win,
> > + struct v4l2_framebuffer *fbuf, const struct v4l2_rect
> *new_crop)
> > +{
> > + struct v4l2_rect try_crop;
> > + unsigned long vresize, hresize;
> > +
> > + /* make a working copy of the new_crop rectangle */
> > + try_crop = *new_crop;
> > +
> > + /* adjust the cropping rectangle so it fits in the image */
> > + if (try_crop.left < 0) {
> > + try_crop.width += try_crop.left;
> > + try_crop.left = 0;
> > + }
> > + if (try_crop.top < 0) {
> > + try_crop.height += try_crop.top;
> > + try_crop.top = 0;
> > + }
> > + try_crop.width = (try_crop.width < pix->width) ?
> > + try_crop.width : pix->width;
> > + try_crop.height = (try_crop.height < pix->height) ?
> > + try_crop.height : pix->height;
> > + if (try_crop.left + try_crop.width > pix->width)
> > + try_crop.width = pix->width - try_crop.left;
> > + if (try_crop.top + try_crop.height > pix->height)
> > + try_crop.height = pix->height - try_crop.top;
> > + try_crop.width &= ~1;
> > + try_crop.height &= ~1;
> > + if (try_crop.width <= 0 || try_crop.height <= 0)
> > + return -EINVAL;
> > +
> > + if (crop->height != win->w.height) {
> > + /* If we're resizing vertically, we can't support a crop
> width
> > + * wider than 768 pixels.
> > + */
> > + if (try_crop.width > 768)
> > + try_crop.width = 768;
> > + }
> > + /* vertical resizing */
> > + vresize = (1024 * crop->height) / win->w.height;
> > + if (vresize > 2048)
> > + vresize = 2048;
> > + else if (vresize == 0)
> > + vresize = 1;
> > + win->w.height = ((1024 * try_crop.height) / vresize) & ~1;
> > + if (win->w.height == 0)
> > + win->w.height = 2;
> > + if (win->w.height + win->w.top > fbuf->fmt.height) {
> > + /* We made the preview window extend below the bottom of the
> > + * display, so clip it to the display boundary and resize
> the
> > + * cropping height to maintain the vertical resizing ratio.
> > + */
> > + win->w.height = (fbuf->fmt.height - win->w.top) & ~1;
> > + if (try_crop.height == 0)
> > + try_crop.height = 2;
> > + }
> > + /* horizontal resizing */
> > + hresize = (1024 * crop->width) / win->w.width;
> > + if (hresize > 2048)
> > + hresize = 2048;
> > + else if (hresize == 0)
> > + hresize = 1;
> > + win->w.width = ((1024 * try_crop.width) / hresize) & ~1;
> > + if (win->w.width == 0)
> > + win->w.width = 2;
> > + if (win->w.width + win->w.left > fbuf->fmt.width) {
> > + /* We made the preview window extend past the right side of
> the
> > + * display, so clip it to the display boundary and resize
> the
> > + * cropping width to maintain the horizontal resizing ratio.
> > + */
> > + win->w.width = (fbuf->fmt.width - win->w.left) & ~1;
> > + if (try_crop.width == 0)
> > + try_crop.width = 2;
> > + }
> > +
> > + /* Check for resizing constraints */
> > + if ((try_crop.height/win->w.height) >= 2) {
> > + /* The maximum vertical downsizing ratio is 2:1 */
> > + try_crop.height = win->w.height * 2;
> > + }
> > + if ((try_crop.width/win->w.width) >= 2) {
> > + /* The maximum horizontal downsizing ratio is 2:1 */
> > + try_crop.width = win->w.width * 2;
> > + }
> > + if (try_crop.width > 768) {
> > + /* The OMAP2420 vertical resizing line buffer is 768 pixels
> > + * wide. If the cropped image is wider than 768 pixels then
> it
> > + * cannot be vertically resized.
> > + */
> > + if (try_crop.height != win->w.height)
> > + try_crop.width = 768;
> > + }
> > +
> > + /* update our cropping rectangle and we're done */
> > + *crop = try_crop;
> > + return 0;
> > +}
> > +EXPORT_SYMBOL_GPL(omap_vout_new_crop);
> > +
> > +/* Given a new format in pix and fbuf, crop and win
> > + * structures are initialized to default values. crop
> > + * is initialized to the largest window size that will fit on the display.
> The
> > + * crop window is centered in the image. win is initialized to
> > + * the same size as crop and is centered on the display.
> > + * All sizes and offsets are constrained to be even numbers.
> > + */
> > +void omap_vout_new_format(struct v4l2_pix_format *pix,
> > + struct v4l2_framebuffer *fbuf, struct v4l2_rect *crop,
> > + struct v4l2_window *win)
> > +{
> > + /* crop defines the preview source window in the image capture
> > + * buffer
> > + */
> > + omap_vout_default_crop(pix, fbuf, crop);
> > +
> > + /* win defines the preview target window on the display */
> > + win->w.width = crop->width;
> > + win->w.height = crop->height;
> > + win->w.left = ((fbuf->fmt.width - win->w.width) >> 1) & ~1;
> > + win->w.top = ((fbuf->fmt.height - win->w.height) >> 1) & ~1;
> > +}
> > +EXPORT_SYMBOL_GPL(omap_vout_new_format);
> > +
> > +MODULE_AUTHOR("Texas Instruments.");
> > +MODULE_DESCRIPTION("OMAP Video library");
> > +MODULE_LICENSE("GPL");
> > diff --git a/drivers/media/video/omap/omap_voutlib.h
> b/drivers/media/video/omap/omap_voutlib.h
> > new file mode 100644
> > index 0000000..d98f659
> > --- /dev/null
> > +++ b/drivers/media/video/omap/omap_voutlib.h
> > @@ -0,0 +1,34 @@
> > +/*
> > + * drivers/media/video/omap/omap_voutlib.h
> > + *
> > + * Copyright (C) 2008 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.
> > + *
> > + */
> > +
> > +#ifndef OMAP_VOUTLIB_H
> > +#define OMAP_VOUTLIB_H
> > +
> > +extern void omap_vout_default_crop(struct v4l2_pix_format *pix,
> > + struct v4l2_framebuffer *fbuf, struct v4l2_rect *crop);
> > +
> > +extern int omap_vout_new_crop(struct v4l2_pix_format *pix,
> > + struct v4l2_rect *crop, struct v4l2_window *win,
> > + struct v4l2_framebuffer *fbuf,
> > + const struct v4l2_rect *new_crop);
> > +
> > +extern int omap_vout_try_window(struct v4l2_framebuffer *fbuf,
> > + struct v4l2_window *new_win);
> > +
> > +extern int omap_vout_new_window(struct v4l2_rect *crop,
> > + struct v4l2_window *win, struct v4l2_framebuffer *fbuf,
> > + struct v4l2_window *new_win);
> > +
> > +extern void omap_vout_new_format(struct v4l2_pix_format *pix,
> > + struct v4l2_framebuffer *fbuf, struct v4l2_rect *crop,
> > + struct v4l2_window *win);
> > +#endif /* #ifndef OMAP_LIB_H */
>
> Please, also check years in patch.
>
> --
> Best regards, Klimov Alexey
[Shah, Hardik] Hi I will add the latest year for the copyright and module name
also.
Regards,
Hardik Shah
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