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authorOlli Salonen <olli.salonen@iki.fi>2014-07-13 15:52:21 +0200
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-07-15 02:07:07 +0200
commita1dad50d8cdce0be71489c7544ffcd36cf80e994 (patch)
tree2df2fc6f72fc1bc165bbee40f8cd31a6f06004e3 /drivers
parent[media] si2157: Add support for Si2158 chip (diff)
downloadlinux-a1dad50d8cdce0be71489c7544ffcd36cf80e994.tar.xz
linux-a1dad50d8cdce0be71489c7544ffcd36cf80e994.zip
[media] si2157: Set delivery system and bandwidth before tuning
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/tuners/si2157.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index 58c5ef586383..b656f9b72e84 100644
--- a/drivers/media/tuners/si2157.c
+++ b/drivers/media/tuners/si2157.c
@@ -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;