diff options
| author | Daniel Scheller <d.scheller@gmx.net> | 2017-08-12 07:56:01 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-08-20 07:09:33 -0400 |
| commit | adaf4df70521e656c38ace740f1d98096825a430 (patch) | |
| tree | 0592518b6547b2a7a396ba506b1db35e90abe6b0 /drivers/media/pci/ddbridge/Kconfig | |
| parent | fc3fb43e41a15a3508f919a825c186c6e5a22404 (diff) | |
media: ddbridge: Kconfig option to control the MSI modparam default
It is known that MSI interrupts - while working quite well so far - can
still cause issues on some hardware platforms (causing I2C timeouts due
to unhandled interrupts). The msi variable/option is set to 1 by default.
So, add a Kconfig option prefixed with "EXPERIMENTAL" that will control
the default value of that modparam, defaulting to off for a better
user experience and (guaranteed) stable operation "per default".
Cc: Ralph Metzler <rjkm@metzlerbros.de>
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Tested-by: Richard Scobie <r.scobie@clear.net.nz>
Tested-by: Jasmin Jessich <jasmin@anw.at>
Tested-by: Dietmar Spingler <d_spingler@freenet.de>
Tested-by: Manfred Knick <Manfred.Knick@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/pci/ddbridge/Kconfig')
| -rw-r--r-- | drivers/media/pci/ddbridge/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/media/pci/ddbridge/Kconfig b/drivers/media/pci/ddbridge/Kconfig index c79a58fa5fc3..1330b2ecc72a 100644 --- a/drivers/media/pci/ddbridge/Kconfig +++ b/drivers/media/pci/ddbridge/Kconfig @@ -26,3 +26,18 @@ config DVB_DDBRIDGE - CineS2 V7/V7A and DuoFlex S2 V4 (ST STV0910-based) Say Y if you own such a card and want to use it. + +config DVB_DDBRIDGE_MSIENABLE + bool "Enable Message Signaled Interrupts (MSI) per default (EXPERIMENTAL)" + depends on DVB_DDBRIDGE + depends on PCI_MSI + default n + ---help--- + Use PCI MSI (Message Signaled Interrupts) per default. Enabling this + might lead to I2C errors originating from the bridge in conjunction + with certain SATA controllers, requiring a reload of the ddbridge + module. MSI can still be disabled by passing msi=0 as option, as + this will just change the msi option default value. + + If you're unsure, concerned about stability and don't want to pass + module options in case of troubles, say N. |