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| author | Mauro Carvalho Chehab <mchehab@brturbo.com.br> | 2005-08-04 12:53:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-08-04 13:00:54 -0700 |
| commit | 4dcef52400fa6b9eb2de589300ae0151a1c65b3b (patch) | |
| tree | f8023c75eb4ce1fad2e22560aaf1e52a27254046 /Documentation | |
| parent | 75eedfed3e2d05563f44d2f69efb991fad95d7f1 (diff) | |
| download | lwn-4dcef52400fa6b9eb2de589300ae0151a1c65b3b.tar.gz lwn-4dcef52400fa6b9eb2de589300ae0151a1c65b3b.zip | |
[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-options | 3 |
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 |