V4L/DVB (9513): cx18: Reduce number of mmio read retries

Browse source

cx18: Reduce number of mmio read retries to improve performance.  Experiments
have shown 2 things: read retries never improve the result of a suspect mmio
read from the CX23418 (the result stays all 0xff's), and that most of the
suspected read failures are actually proper reads of values that should be
all 0xff's.  This change reduces the number of read retries and keeps the
count separate from write retries.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

...

This commit is contained in:

Andy Walls 2008-11-02 18:15:28 -03:00 • committed by Mauro Carvalho Chehab

parent f2e52cd176

commit f7823f8f43

4 changed files with 22 additions and 21 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

4

drivers/media/video/cx18/cx18-av-firmware.c

View file

7

drivers/media/video/cx18/cx18-driver.h

View file

24

drivers/media/video/cx18/cx18-io.c

View file

8

drivers/media/video/cx18/cx18-io.h

View file