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authorMauro Carvalho Chehab <mchehab@brturbo.com.br>2005-08-04 15:53:30 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-04 16:00:54 -0400
commit4dcef52400fa6b9eb2de589300ae0151a1c65b3b (patch)
treef8023c75eb4ce1fad2e22560aaf1e52a27254046 /Documentation
parent75eedfed3e2d05563f44d2f69efb991fad95d7f1 (diff)
[PATCH] v4l: oopsfix for BTTV on badly behaved PCI chipsets
no_overlay bttv parameter implemented to fix OOPS on some PCI chipsets (like some VIA) with these behaviors: 1) If pci_quicks does identify the chip as having troubles to handle PCI2PCI transfers, no_overlay defaults to 1. The user may force it to 0, to reenable (not recommended). 2) For newer chipsets not blacklisted, no_overlay=1 is provided as a workaround until PCI chipset included on /drivers/pci/quirks.c Thanks to Bodo Eggert <7eggert@gmx.de> Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/video4linux/bttv/Insmod-options3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/video4linux/bttv/Insmod-options b/Documentation/video4linux/bttv/Insmod-options
index 7bb5a50b077..fc94ff235ff 100644
--- a/Documentation/video4linux/bttv/Insmod-options
+++ b/Documentation/video4linux/bttv/Insmod-options
@@ -44,6 +44,9 @@ bttv.o
44 push used by bttv. bttv will disable overlay 44 push used by bttv. bttv will disable overlay
45 by default on this hardware to avoid crashes. 45 by default on this hardware to avoid crashes.
46 With this insmod option you can override this. 46 With this insmod option you can override this.
47 no_overlay=1 Disable overlay. It should be used by broken
48 hardware that doesn't support PCI2PCI direct
49 transfers.
47 automute=0/1 Automatically mutes the sound if there is 50 automute=0/1 Automatically mutes the sound if there is
48 no TV signal, on by default. You might try 51 no TV signal, on by default. You might try
49 to disable this if you have bad input signal 52 to disable this if you have bad input signal