]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
V4L/DVB (9270): cx24116: optimise emulated auto-pilot
authorChristophe Thommeret <hftom@free.fr>
Wed, 15 Oct 2008 23:01:32 +0000 (20:01 -0300)
committerMauro Carvalho Chehab <mchehab@redhat.com>
Fri, 17 Oct 2008 20:29:46 +0000 (17:29 -0300)
commit745632147d54cd4db6812045351510ebd3981a24
treecc1e0d8dada7b2ce4bad2851c3ffea320bd61322
parent430189da042f8cc3305b8fbbce18ea103501fb90
V4L/DVB (9270): cx24116: optimise emulated auto-pilot

Christophe divulged the following:
"Since 8PSK (and higher mod) signals are very likely to have pilot symbols,
pilot_auto should start with pilot_on for 8PSK.
And since QPSK signals are unlikely to have pilot, pilot_auto should start
with pilot_off for QPSK.

Without the patch:
QPSK tuning delay: ~100ms
8PSK tuning delay: ~900ms
with patch:
QPSK tuning delay: ~100ms
8PSK tuning delay: ~100ms
"

This patch does as Cristophe asks. In emulated auto-pilot we
choose pilot-on for tuning PSK_8 and pilot-off for
tuning QPSK.

Signed-off-by: Darron Broad <darron@kewl.org>
Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
drivers/media/dvb/frontends/cx24116.c