leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[media] si2157: Set delivery system and bandwidth before tuning

Browse Source 
Tell used TV standard and bandwidth for tuner firmware.

Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Olli Salonen 2014-07-13 10:52:21 -03:00 committed by Mauro Carvalho Chehab
parent 1b92373f4b
commit a1dad50d8c
1 changed files with 31 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/media/tuners/si2157.c
View File

@ -209,6 +209,7 @@ static int si2157_set_params(struct dvb_frontend *fe)
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
struct si2157_cmd cmd;
u8 bandwidth, delivery_system;
dev_dbg(&s->client->dev,
"%s: delivery_system=%d frequency=%u bandwidth_hz=%u\n",
@ -220,6 +221,36 @@ static int si2157_set_params(struct dvb_frontend *fe)
goto err;
}
if (c->bandwidth_hz <= 6000000)
bandwidth = 0x06;
else if (c->bandwidth_hz <= 7000000)
bandwidth = 0x07;
else if (c->bandwidth_hz <= 8000000)
bandwidth = 0x08;
else
bandwidth = 0x0f;
switch (c->delivery_system) {
case SYS_DVBT:
case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
delivery_system = 0x20;
break;
case SYS_DVBC_ANNEX_A:
delivery_system = 0x30;
break;
default:
ret = -EINVAL;
goto err;
}
memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
cmd.args[4] = delivery_system | bandwidth;
cmd.wlen = 6;
cmd.rlen = 1;
ret = si2157_cmd_execute(s, &cmd);
if (ret)
goto err;
/* set frequency */
memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
cmd.args[4] = (c->frequency >> 0) & 0xff;