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Commit 3e41313a authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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[media] af9033: implement DVBv5 statistics for CNR 



Return CNR via DVBv5 statistics API.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 83f11619

drivers/media/dvb-frontends/af9033.c

+52 −2
Original line number Diff line number Diff line
@@ -1054,11 +1054,12 @@ static void af9033_stat_work(struct work_struct *work) 
{

	struct af9033_dev *dev = container_of(work, struct af9033_dev, stat_work.work);

	struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;

	int ret, tmp;

	u8 u8tmp;

	int ret, tmp, i, len;

	u8 u8tmp, buf[3];



	dev_dbg(&dev->client->dev, "\n");



	/* signal strength */

	if (dev->fe_status & FE_HAS_SIGNAL) {

		if (dev->is_af9035) {

			ret = af9033_rd_reg(dev, 0x80004a, &u8tmp);
@@ -1078,6 +1079,55 @@ static void af9033_stat_work(struct work_struct *work) 
		c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;

	}



	/* CNR */

	if (dev->fe_status & FE_HAS_VITERBI) {

		u32 snr_val;

		const struct val_snr *snr_lut;



		/* read value */

		ret = af9033_rd_regs(dev, 0x80002c, buf, 3);

		if (ret)

			goto err;



		snr_val = (buf[2] << 16) | (buf[1] << 8) | (buf[0] << 0);



		/* read current modulation */

		ret = af9033_rd_reg(dev, 0x80f903, &u8tmp);

		if (ret)

			goto err;



		switch ((u8tmp >> 0) & 3) {

		case 0:

			len = ARRAY_SIZE(qpsk_snr_lut);

			snr_lut = qpsk_snr_lut;

			break;

		case 1:

			len = ARRAY_SIZE(qam16_snr_lut);

			snr_lut = qam16_snr_lut;

			break;

		case 2:

			len = ARRAY_SIZE(qam64_snr_lut);

			snr_lut = qam64_snr_lut;

			break;

		default:

			goto err_schedule_delayed_work;

		}



		for (i = 0; i < len; i++) {

			tmp = snr_lut[i].snr * 1000;

			if (snr_val < snr_lut[i].val)

				break;

		}



		c->cnr.len = 1;

		c->cnr.stat[0].scale = FE_SCALE_DECIBEL;

		c->cnr.stat[0].svalue = tmp;

	} else {

		c->cnr.len = 1;

		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;

	}



err_schedule_delayed_work:

	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));

	return;

err: