Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 98 insertions, 0 deletions

diff --git a/kernel/Documentation/dvb/bt8xx.txt b/kernel/Documentation/dvb/bt8xx.txt
new file mode 100644
index 000000000..b7b1d1b1d
--- /dev/null
+++ b/kernel/Documentation/dvb/bt8xx.txt
@@ -0,0 +1,98 @@
+How to get the bt8xx cards working
+==================================
+
+1) General information
+======================
+
+This class of cards has a bt878a as the PCI interface, and require the bttv driver
+for accessing the i2c bus and the gpio pins of the bt8xx chipset.
+Please see Documentation/dvb/cards.txt => o Cards based on the Conexant Bt8xx PCI bridge:
+
+Compiling kernel please enable:
+a.)"Device drivers" => "Multimedia devices" => "Video For Linux" => "Enable Video for Linux API 1 (DEPRECATED)"
+b.)"Device drivers" => "Multimedia devices" => "Video For Linux" => "Video Capture Adapters" => "BT848 Video For Linux"
+c.)"Device drivers" => "Multimedia devices" => "Digital Video Broadcasting Devices" => "DVB for Linux" "DVB Core Support" "Bt8xx based PCI Cards"
+
+Please use the following options with care as deselection of drivers which are in fact necessary
+may result in DVB devices that cannot be tuned due to lack of driver support:
+You can save RAM by deselecting every frontend module that your DVB card does not need.
+
+First please remove the static dependency of DVB card drivers on all frontend modules for all possible card variants by enabling:
+d.) "Device drivers" => "Multimedia devices" => "Digital Video Broadcasting Devices"
+ => "DVB for Linux" "DVB Core Support" "Load and attach frontend modules as needed"
+
+If you know the frontend driver that your card needs please enable:
+e.)"Device drivers" => "Multimedia devices" => "Digital Video Broadcasting Devices"
+ => "DVB for Linux" "DVB Core Support" "Customise DVB Frontends" => "Customise the frontend modules to build"
+ Then please select your card-specific frontend module.
+
+2) Loading Modules
+==================
+
+Regular case: If the bttv driver detects a bt8xx-based DVB card, all frontend and backend modules will be loaded automatically.
+Exceptions are:
+- Old TwinHan DST cards or clones with or without CA slot and not containing an Eeprom.
+People running udev please see Documentation/dvb/udev.txt.
+
+In the following cases overriding the PCI type detection for dvb-bt8xx might be necessary:
+
+2a) Running TwinHan and Clones
+------------------------------
+
+	$ modprobe bttv card=113
+	$ modprobe dst
+
+Useful parameters for verbosity level and debugging the dst module:
+
+verbose=0:		messages are disabled
+	1:		only error messages are displayed
+	2:		notifications are displayed
+	3:		other useful messages are displayed
+	4:		debug setting
+dst_addons=0:		card is a free to air (FTA) card only
+	   0x20:	card has a conditional access slot for scrambled channels
+
+The autodetected values are determined by the cards' "response string".
+In your logs see f. ex.: dst_get_device_id: Recognize [DSTMCI].
+For bug reports please send in a complete log with verbose=4 activated.
+Please also see Documentation/dvb/ci.txt.
+
+2b) Running multiple cards
+--------------------------
+
+Examples of card ID's:
+
+Pinnacle PCTV Sat:		 94
+Nebula Electronics Digi TV:	104
+pcHDTV HD-2000 TV:		112
+Twinhan DST and clones:		113
+Avermedia AverTV DVB-T 771:	123
+Avermedia AverTV DVB-T 761:	124
+DViCO FusionHDTV DVB-T Lite:	128
+DViCO FusionHDTV 5 Lite:	135
+
+Notice: The order of the card ID should be uprising:
+Example:
+	$ modprobe bttv card=113 card=135
+
+For a full list of card ID's please see Documentation/video4linux/CARDLIST.bttv.
+In case of further problems please subscribe and send questions to the mailing list: linux-dvb@linuxtv.org.
+
+2c) Probing the cards with broken PCI subsystem ID
+--------------------------------------------------
+There are some TwinHan cards that the EEPROM has become corrupted for some
+reason. The cards do not have correct PCI subsystem ID. But we can force
+probing the cards with broken PCI subsystem ID
+
+	$ echo 109e 0878 $subvendor $subdevice > \
+		/sys/bus/pci/drivers/bt878/new_id
+
+109e: PCI_VENDOR_ID_BROOKTREE
+0878: PCI_DEVICE_ID_BROOKTREE_878
+
+Authors: Richard Walker,
+	 Jamie Honan,
+	 Michael Hunold,
+	 Manu Abraham,
+	 Uwe Bugla,
+	 Michael Krufky