target/linux/brcm2708/patches-4.4/0054-fbdev-add-FBIOCOPYAREA-ioctl.patch

   1 From f978fb3b816681159b6cc97104954dea31488add Mon Sep 17 00:00:00 2001
   2 From: Siarhei Siamashka <siarhei.siamashka@gmail.com>
   3 Date: Mon, 17 Jun 2013 13:32:11 +0300
   4 Subject: [PATCH 054/170] fbdev: add FBIOCOPYAREA ioctl
   5
   6 Based on the patch authored by Ali Gholami Rudi at
   7     https://lkml.org/lkml/2009/7/13/153
   8
   9 Provide an ioctl for userspace applications, but only if this operation
  10 is hardware accelerated (otherwide it does not make any sense).
  11
  12 Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
  13 ---
  14  drivers/video/fbdev/core/fbmem.c | 30 ++++++++++++++++++++++++++++++
  15  include/uapi/linux/fb.h          |  5 +++++
  16  2 files changed, 35 insertions(+)
  17
  18 --- a/drivers/video/fbdev/core/fbmem.c
  19 +++ b/drivers/video/fbdev/core/fbmem.c
  20 @@ -1084,6 +1084,25 @@ fb_blank(struct fb_info *info, int blank
  21  }
  22  EXPORT_SYMBOL(fb_blank);
  23
  24 +static int fb_copyarea_user(struct fb_info *info,
  25 +                           struct fb_copyarea *copy)
  26 +{
  27 +       int ret = 0;
  28 +       if (!lock_fb_info(info))
  29 +               return -ENODEV;
  30 +       if (copy->dx + copy->width > info->var.xres ||
  31 +           copy->sx + copy->width > info->var.xres ||
  32 +           copy->dy + copy->height > info->var.yres ||
  33 +           copy->sy + copy->height > info->var.yres) {
  34 +               ret = -EINVAL;
  35 +               goto out;
  36 +       }
  37 +       info->fbops->fb_copyarea(info, copy);
  38 +out:
  39 +       unlock_fb_info(info);
  40 +       return ret;
  41 +}
  42 +
  43  static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
  44                         unsigned long arg)
  45  {
  46 @@ -1094,6 +1113,7 @@ static long do_fb_ioctl(struct fb_info *
  47         struct fb_cmap cmap_from;
  48         struct fb_cmap_user cmap;
  49         struct fb_event event;
  50 +       struct fb_copyarea copy;
  51         void __user *argp = (void __user *)arg;
  52         long ret = 0;
  53
  54 @@ -1211,6 +1231,15 @@ static long do_fb_ioctl(struct fb_info *
  55                 unlock_fb_info(info);
  56                 console_unlock();
  57                 break;
  58 +       case FBIOCOPYAREA:
  59 +               if (info->flags & FBINFO_HWACCEL_COPYAREA) {
  60 +                       /* only provide this ioctl if it is accelerated */
  61 +                       if (copy_from_user(&copy, argp, sizeof(copy)))
  62 +                               return -EFAULT;
  63 +                       ret = fb_copyarea_user(info, &copy);
  64 +                       break;
  65 +               }
  66 +               /* fall through */
  67         default:
  68                 if (!lock_fb_info(info))
  69                         return -ENODEV;
  70 @@ -1365,6 +1394,7 @@ static long fb_compat_ioctl(struct file
  71         case FBIOPAN_DISPLAY:
  72         case FBIOGET_CON2FBMAP:
  73         case FBIOPUT_CON2FBMAP:
  74 +       case FBIOCOPYAREA:
  75                 arg = (unsigned long) compat_ptr(arg);
  76         case FBIOBLANK:
  77                 ret = do_fb_ioctl(info, cmd, arg);
  78 --- a/include/uapi/linux/fb.h
  79 +++ b/include/uapi/linux/fb.h
  80 @@ -34,6 +34,11 @@
  81  #define FBIOPUT_MODEINFO        0x4617
  82  #define FBIOGET_DISPINFO        0x4618
  83  #define FBIO_WAITFORVSYNC      _IOW('F', 0x20, __u32)
  84 +/*
  85 + * HACK: use 'z' in order not to clash with any other ioctl numbers which might
  86 + * be concurrently added to the mainline kernel
  87 + */
  88 +#define FBIOCOPYAREA           _IOW('z', 0x21, struct fb_copyarea)
  89
  90  #define FB_TYPE_PACKED_PIXELS          0       /* Packed Pixels        */
  91  #define FB_TYPE_PLANES                 1       /* Non interleaved planes */