diff options
| author | Andy Walls | 2008-09-29 02:46:02 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab | 2008-10-12 13:37:14 +0200 |
| commit | d267d85101c509020a12686b96cbd179deaf4ecd (patch) | |
| tree | 1a016966d11efb400ca310cd5726478053cd00a0 /drivers/media/video/cx18/cx18-av-core.h | |
| parent | V4L/DVB (9108): cinergyT2: add remote key repeat feature (diff) | |
| download | kernel-qcow2-linux-d267d85101c509020a12686b96cbd179deaf4ecd.tar.gz kernel-qcow2-linux-d267d85101c509020a12686b96cbd179deaf4ecd.tar.xz kernel-qcow2-linux-d267d85101c509020a12686b96cbd179deaf4ecd.zip | |
V4L/DVB (9110): cx18: Add default behavior of checking and retrying PCI MMIO accesses
cx18: Add default behavior of checking and retrying PCI MMIO accesses.
The concept of checking and retrying PCI MMIO accesses for better reliability
in older motherboards was suggested by Steve Toth <stoth@linuxtv.org>. This
change implements MMIO retries and the retry_mmio module parameter that is
enabled by default. Limited experiments have shown this is more reliable than
the mmio_ndelay parameter. mmio_ndelay has insignificant effect with retries
enabled.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/cx18/cx18-av-core.h')
| -rw-r--r-- | drivers/media/video/cx18/cx18-av-core.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-av-core.h b/drivers/media/video/cx18/cx18-av-core.h index eb61fa1e0965..b67d8df20cc6 100644 --- a/drivers/media/video/cx18/cx18-av-core.h +++ b/drivers/media/video/cx18/cx18-av-core.h @@ -301,8 +301,10 @@ struct cx18_av_state { /* cx18_av-core.c */ int cx18_av_write(struct cx18 *cx, u16 addr, u8 value); int cx18_av_write4(struct cx18 *cx, u16 addr, u32 value); +int cx18_av_write4_noretry(struct cx18 *cx, u16 addr, u32 value); u8 cx18_av_read(struct cx18 *cx, u16 addr); u32 cx18_av_read4(struct cx18 *cx, u16 addr); +u32 cx18_av_read4_noretry(struct cx18 *cx, u16 addr); int cx18_av_and_or(struct cx18 *cx, u16 addr, unsigned mask, u8 value); int cx18_av_and_or4(struct cx18 *cx, u16 addr, u32 mask, u32 value); int cx18_av_cmd(struct cx18 *cx, unsigned int cmd, void *arg); |