target/linux/brcm2708/patches-3.18/0008-fbdev-add-FBIOCOPYAREA-ioctl.patch

   1 From f67ad61f5999035fad1610d00a966989f34e3ce5 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 008/114] 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 diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
  19 index 0705d88..771992a 100644
  20 --- a/drivers/video/fbdev/core/fbmem.c
  21 +++ b/drivers/video/fbdev/core/fbmem.c
  22 @@ -1084,6 +1084,25 @@ fb_blank(struct fb_info *info, int blank)
  23  }
  24  EXPORT_SYMBOL(fb_blank);
  25
  26 +static int fb_copyarea_user(struct fb_info *info,
  27 +                           struct fb_copyarea *copy)
  28 +{
  29 +       int ret = 0;
  30 +       if (!lock_fb_info(info))
  31 +               return -ENODEV;
  32 +       if (copy->dx + copy->width > info->var.xres ||
  33 +           copy->sx + copy->width > info->var.xres ||
  34 +           copy->dy + copy->height > info->var.yres ||
  35 +           copy->sy + copy->height > info->var.yres) {
  36 +               ret = -EINVAL;
  37 +               goto out;
  38 +       }
  39 +       info->fbops->fb_copyarea(info, copy);
  40 +out:
  41 +       unlock_fb_info(info);
  42 +       return ret;
  43 +}
  44 +
  45  static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
  46                         unsigned long arg)
  47  {
  48 @@ -1094,6 +1113,7 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
  49         struct fb_cmap cmap_from;
  50         struct fb_cmap_user cmap;
  51         struct fb_event event;
  52 +       struct fb_copyarea copy;
  53         void __user *argp = (void __user *)arg;
  54         long ret = 0;
  55
  56 @@ -1211,6 +1231,15 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
  57                 unlock_fb_info(info);
  58                 console_unlock();
  59                 break;
  60 +       case FBIOCOPYAREA:
  61 +               if (info->flags & FBINFO_HWACCEL_COPYAREA) {
  62 +                       /* only provide this ioctl if it is accelerated */
  63 +                       if (copy_from_user(&copy, argp, sizeof(copy)))
  64 +                               return -EFAULT;
  65 +                       ret = fb_copyarea_user(info, &copy);
  66 +                       break;
  67 +               }
  68 +               /* fall through */
  69         default:
  70                 if (!lock_fb_info(info))
  71                         return -ENODEV;
  72 @@ -1365,6 +1394,7 @@ static long fb_compat_ioctl(struct file *file, unsigned int cmd,
  73         case FBIOPAN_DISPLAY:
  74         case FBIOGET_CON2FBMAP:
  75         case FBIOPUT_CON2FBMAP:
  76 +       case FBIOCOPYAREA:
  77                 arg = (unsigned long) compat_ptr(arg);
  78         case FBIOBLANK:
  79                 ret = do_fb_ioctl(info, cmd, arg);
  80 diff --git a/include/uapi/linux/fb.h b/include/uapi/linux/fb.h
  81 index fb795c3..fa72af0 100644
  82 --- a/include/uapi/linux/fb.h
  83 +++ b/include/uapi/linux/fb.h
  84 @@ -34,6 +34,11 @@
  85  #define FBIOPUT_MODEINFO        0x4617
  86  #define FBIOGET_DISPINFO        0x4618
  87  #define FBIO_WAITFORVSYNC      _IOW('F', 0x20, __u32)
  88 +/*
  89 + * HACK: use 'z' in order not to clash with any other ioctl numbers which might
  90 + * be concurrently added to the mainline kernel
  91 + */
  92 +#define FBIOCOPYAREA           _IOW('z', 0x21, struct fb_copyarea)
  93
  94  #define FB_TYPE_PACKED_PIXELS          0       /* Packed Pixels        */
  95  #define FB_TYPE_PLANES                 1       /* Non interleaved planes */
  96 --
  97 1.8.3.2
  98