V4L/DVB (5701): Documentation/dvb/bt8xx.txt update

This patch synchronizes the Documentation for bt8xx-based cards to the
actual state of kernel 2.6.22-rc1.

Signed-off-by: Uwe Bugla <uwe.bugla@gmx.de>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

Documentation/dvb/bt8xx.txt

@@ -9,19 +9,29 @@ 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" => "BT848 Video For Linux"
-b.)"Device drivers" => "Multimedia devices" => "Digital Video Broadcasting Devices"
- => "DVB for Linux" "DVB Core Support" "Bt8xx based PCI Cards"
+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"
 
-2) Loading Modules
-==================
+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"
 
-In default cases bttv is loaded automatically.
-To load the backend either place dvb-bt8xx in etc/modules, or apply manually:
+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.
 
-	$ modprobe dvb-bt8xx
+2) Loading Modules
+==================
 
-All frontends will be loaded automatically.
+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:
@@ -30,7 +40,6 @@ In the following cases overriding the PCI type detection for dvb-bt8xx might be
 ------------------------------
 
 	$ modprobe bttv card=113
-	$ modprobe dvb-bt8xx
 	$ modprobe dst
 
 Useful parameters for verbosity level and debugging the dst module:
@@ -65,10 +74,9 @@ DViCO FusionHDTV 5 Lite:	135
 Notice: The order of the card ID should be uprising:
 Example:
 	$ modprobe bttv card=113 card=135
-	$ modprobe dvb-bt8xx
 
 For a full list of card ID's please see Documentation/video4linux/CARDLIST.bttv.
-In case of further problems send questions to the mailing list: www.linuxdvb.org.
+In case of further problems please subscribe and send questions to the mailing list: linux-dvb@linuxtv.org.
 
 Authors: Richard Walker,
 	 Jamie Honan,