[pvrusb2] [patch] pvrusb2-mci-20100708 crop support

[vdb128 at picaros.org]

The text here below gives a recipe to upgrade to 2.6.35 and to patch the 
cx25840 module for cropping support.

The patches and firmwares are at http://picaros.org/pvrusb/ .

Linux-2.6.35
  If you intend to compile with a gcc before version 4.1 the patch 
  linuxgcc is required.  This patch just reorganizes a tiny bit of 
  code.  The patch cx25840-2.6.35 adds crop support.  
  
  config
  - relocateble kernel: off
  - media pvrusb2: on since this autoselects all the other modules
  - soft watchdog timer: on
  - enable sysrq: Alt+SysRq+B reboots the system
  make bzImage && make modules && make modules_install

pvrusb2-mci-20100708
  The patch pvrusb2-mci-20100708x adds the crop calls to the v4l2 
  subdevices.  

  It also redefines the installation directory as
    INSTALL_MOD_DIR := kernel/drivers/media/video/pvrusb2
  so 'make install' will overwrite the kernel module.  

Make sure that the current kernel remains bootable.  I use 3 images: 
linux vmlinuz, old vmlinuz.old, keep vmlinuz.keep.  Hence the linux 
'make install' only touches the first two.  

All seems to be working well, except for 'rmmod pvrusb2' which hangs 
forever.  If the cx25840 code works well for 525 systems then it might 
perhaps be worthwile to take a chance with it on the linux-media 
mailinglist.  

-vdb.