[media] rtl2832: implement DVBv5 signal strength statistics
Estimate signal strength from IF digital AGC. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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@ -474,6 +474,8 @@ static int rtl2832_init(struct dvb_frontend *fe)
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goto err;
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#endif
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/* init stats here in order signal app which stats are supported */
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c->strength.len = 1;
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c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
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c->cnr.len = 1;
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c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
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c->post_bit_error.len = 1;
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@ -823,6 +825,24 @@ static void rtl2832_stat_work(struct work_struct *work)
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dev_dbg(&client->dev, "\n");
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/* signal strength */
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if (dev->fe_status & FE_HAS_SIGNAL) {
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/* read digital AGC */
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ret = rtl2832_bulk_read(client, 0x305, &u8tmp, 1);
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if (ret)
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goto err;
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dev_dbg(&client->dev, "digital agc=%02x", u8tmp);
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u8tmp = ~u8tmp;
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u16tmp = u8tmp << 8 | u8tmp << 0;
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c->strength.stat[0].scale = FE_SCALE_RELATIVE;
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c->strength.stat[0].uvalue = u16tmp;
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} else {
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c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
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}
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/* CNR */
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if (dev->fe_status & FE_HAS_VITERBI) {
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unsigned hierarchy, constellation;
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