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Commit a1dad50d authored by Olli Salonen's avatar Olli Salonen Committed by Mauro Carvalho Chehab
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[media] si2157: Set delivery system and bandwidth before tuning 



Tell used TV standard and bandwidth for tuner firmware.

Signed-off-by: default avatarOlli Salonen <olli.salonen@iki.fi>
Reviewed-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 1b92373f

drivers/media/tuners/si2157.c

+31 −0
Original line number Diff line number Diff line
@@ -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;