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media: si2168: Add spectrum inversion property

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Some tuners produce inverted spectrum, but the si2168 is not
currently set up to accept it. This adds an optional parameter
to set the frontend up to receive inverted spectrum.

Parameter is optional and only boards who enable inversion
will utilize this.

Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Brad Love 2018-01-17 17:31:58 -05:00 committed by Mauro Carvalho Chehab
parent a398e04363
commit d4c779bc91
3 changed files with 7 additions and 0 deletions
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3
drivers/media/dvb-frontends/si2168.c
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@ -339,6 +339,8 @@ static int si2168_set_frontend(struct dvb_frontend *fe)
memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6);
cmd.args[4] = delivery_system | bandwidth;
if (dev->spectral_inversion)
cmd.args[5] |= 1;
cmd.wlen = 6;
cmd.rlen = 4;
ret = si2168_cmd_execute(client, &cmd);
@ -798,6 +800,7 @@ static int si2168_probe(struct i2c_client *client,
dev->ts_mode = config->ts_mode;
dev->ts_clock_inv = config->ts_clock_inv;
dev->ts_clock_gapped = config->ts_clock_gapped;
dev->spectral_inversion = config->spectral_inversion;
dev_info(&client->dev, "Silicon Labs Si2168-%c%d%d successfully identified\n",
dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,

3
drivers/media/dvb-frontends/si2168.h
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@ -46,6 +46,9 @@ struct si2168_config {
/* TS clock gapped */
bool ts_clock_gapped;
/* Inverted spectrum */
bool spectral_inversion;
};
#endif

1
drivers/media/dvb-frontends/si2168_priv.h
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@ -48,6 +48,7 @@ struct si2168_dev {
u8 ts_mode;
bool ts_clock_inv;
bool ts_clock_gapped;
bool spectral_inversion;
};
/* firmware command struct */