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[media] rtl2830: implement DVBv5 CNR statistic 

DVBv5 CNR.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Antti Palosaari 2014-12-09 06:14:36 -03:00 committed by Mauro Carvalho Chehab
parent 947debb4f2
commit 47b4dbfff1
2 changed files with 77 additions and 0 deletions
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74
drivers/media/dvb-frontends/rtl2830.c
View File

@ -177,6 +177,7 @@ static int rtl2830_init(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
struct rtl2830_dev *dev = i2c_get_clientdata(client);
struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
int ret, i;
struct rtl2830_reg_val_mask tab[] = {
{0x00d, 0x01, 0x03},
@ -244,6 +245,12 @@ static int rtl2830_init(struct dvb_frontend *fe)
if (ret)
goto err;
/* init stats here in order signal app which stats are supported */
c->cnr.len = 1;
c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
/* start statistics polling */
schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
dev->sleeping = false;
return ret;
@ -258,6 +265,9 @@ static int rtl2830_sleep(struct dvb_frontend *fe)
struct rtl2830_dev *dev = i2c_get_clientdata(client);
dev->sleeping = true;
/* stop statistics polling */
cancel_delayed_work_sync(&dev->stat_work);
dev->fe_status = 0;
return 0;
}
@ -518,6 +528,8 @@ static int rtl2830_read_status(struct dvb_frontend *fe, fe_status_t *status)
FE_HAS_VITERBI;
}
dev->fe_status = *status;
return ret;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
@ -670,6 +682,66 @@ static struct dvb_frontend_ops rtl2830_ops = {
.read_signal_strength = rtl2830_read_signal_strength,
};
static void rtl2830_stat_work(struct work_struct *work)
{
struct rtl2830_dev *dev = container_of(work, struct rtl2830_dev, stat_work.work);
struct i2c_client *client = dev->client;
struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
int ret, tmp;
u8 u8tmp, buf[2];
u16 u16tmp;
dev_dbg(&client->dev, "\n");
/* CNR */
if (dev->fe_status & FE_HAS_VITERBI) {
unsigned hierarchy, constellation;
#define CONSTELLATION_NUM 3
#define HIERARCHY_NUM 4
static const u32 constant[CONSTELLATION_NUM][HIERARCHY_NUM] = {
{70705899, 70705899, 70705899, 70705899},
{82433173, 82433173, 87483115, 94445660},
{92888734, 92888734, 95487525, 99770748},
};
ret = rtl2830_rd_reg(client, 0x33c, &u8tmp);
if (ret)
goto err;
constellation = (u8tmp >> 2) & 0x03; /* [3:2] */
if (constellation > CONSTELLATION_NUM - 1)
goto err_schedule_delayed_work;
hierarchy = (u8tmp >> 4) & 0x07; /* [6:4] */
if (hierarchy > HIERARCHY_NUM - 1)
goto err_schedule_delayed_work;
ret = rtl2830_rd_regs(client, 0x40c, buf, 2);
if (ret)
goto err;
u16tmp = buf[0] << 8 | buf[1] << 0;
if (u16tmp)
tmp = (constant[constellation][hierarchy] -
intlog10(u16tmp)) / ((1 << 24) / 10000);
else
tmp = 0;
dev_dbg(&client->dev, "CNR raw=%u\n", u16tmp);
c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
c->cnr.stat[0].svalue = tmp;
} else {
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:
dev_dbg(&client->dev, "failed=%d\n", ret);
}
/*
* I2C gate/repeater logic
* We must use unlocked i2c_transfer() here because I2C lock is already taken
@ -765,8 +837,10 @@ static int rtl2830_probe(struct i2c_client *client,
/* setup the state */
i2c_set_clientdata(client, dev);
dev->client = client;
dev->pdata = client->dev.platform_data;
dev->sleeping = true;
INIT_DELAYED_WORK(&dev->stat_work, rtl2830_stat_work);
/* check if the demod is there */
ret = rtl2830_rd_reg(client, 0x000, &u8tmp);

3
drivers/media/dvb-frontends/rtl2830_priv.h
View File

@ -25,10 +25,13 @@
struct rtl2830_dev {
struct rtl2830_platform_data *pdata;
struct i2c_client *client;
struct i2c_adapter *adapter;
struct dvb_frontend fe;
bool sleeping;
u8 page; /* active register page */
struct delayed_work stat_work;
fe_status_t fe_status;
};
struct rtl2830_reg_val_mask {