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authorMauro Carvalho Chehab <mchehab@brturbo.com.br>2005-08-04 12:53:30 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-04 13:00:54 -0700
commit4dcef52400fa6b9eb2de589300ae0151a1c65b3b (patch)
treef8023c75eb4ce1fad2e22560aaf1e52a27254046 /Documentation/video4linux/bttv
parent75eedfed3e2d05563f44d2f69efb991fad95d7f1 (diff)
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[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/video4linux/bttv')
-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 7bb5a50b0779..fc94ff235ffa 100644
--- a/Documentation/video4linux/bttv/Insmod-options
+++ b/Documentation/video4linux/bttv/Insmod-options
@@ -44,6 +44,9 @@ bttv.o
push used by bttv. bttv will disable overlay
by default on this hardware to avoid crashes.
With this insmod option you can override this.
+ no_overlay=1 Disable overlay. It should be used by broken
+ hardware that doesn't support PCI2PCI direct
+ transfers.
automute=0/1 Automatically mutes the sound if there is
no TV signal, on by default. You might try
to disable this if you have bad input signal