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[media] si2157: change command for sleep

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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>
This commit is contained in:
Olli Salonen 2014-08-25 15:07:02 -03:00 committed by Mauro Carvalho Chehab
parent d4d2050006
commit 0e38233d32
1 changed files with 4 additions and 3 deletions
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7
drivers/media/tuners/si2157.c
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@ -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;