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authorOlli Salonen <olli.salonen@iki.fi>2014-08-25 15:07:02 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2014-09-21 16:42:38 -0300
commit0e38233d329e463a64146080c008d8044651bd3f (patch)
tree91c5779bad6980c4757d484b25413ece0b40c256 /drivers/media/tuners
parentd4d2050006bfb0c4af41288143424d3b0b9b325e (diff)
downloadop-kernel-dev-0e38233d329e463a64146080c008d8044651bd3f.zip
op-kernel-dev-0e38233d329e463a64146080c008d8044651bd3f.tar.gz
[media] si2157: change command for sleep
Instead of sending command 13 to the tuner, send command 16 when sleeping. This behaviour is observed when using manufacturer provided binary-only Linux driver for TechnoTrend CT2-4400 (Windows driver does not do power management). The issue with command 13 is that firmware loading is necessary after that. This is not an issue with tuners that do not require firmware, but starting streaming after sleep on an Si2158 takes noticeable time as firmware is loaded on resume. Signed-off-by: Olli Salonen <olli.salonen@iki.fi> Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/tuners')
-rw-r--r--drivers/media/tuners/si2157.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index efb5cce..c84f7b8 100644
--- a/drivers/media/tuners/si2157.c
+++ b/drivers/media/tuners/si2157.c
@@ -197,9 +197,10 @@ static int si2157_sleep(struct dvb_frontend *fe)
s->active = false;
- memcpy(cmd.args, "\x13", 1);
- cmd.wlen = 1;
- cmd.rlen = 0;
+ /* standby */
+ memcpy(cmd.args, "\x16\x00", 2);
+ cmd.wlen = 2;
+ cmd.rlen = 1;
ret = si2157_cmd_execute(s, &cmd);
if (ret)
goto err;
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