[media] rtl2830: implement DVBv5 BER statistic

DVBv5 BER.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/dvb-frontends/rtl2830.c

@@ -250,6 +250,10 @@ static int rtl2830_init(struct dvb_frontend *fe)
 	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 	c->cnr.len = 1;
 	c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->post_bit_error.len = 1;
+	c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->post_bit_count.len = 1;
+	c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 	/* start statistics polling */
 	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
 
@@ -759,6 +763,27 @@ static void rtl2830_stat_work(struct work_struct *work)
 		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 	}
 
+	/* BER */
+	if (dev->fe_status & FE_HAS_LOCK) {
+		ret = rtl2830_rd_regs(client, 0x34e, buf, 2);
+		if (ret)
+			goto err;
+
+		u16tmp = buf[0] << 8 | buf[1] << 0;
+		dev->post_bit_error += u16tmp;
+		dev->post_bit_count += 1000000;
+
+		dev_dbg(&client->dev, "BER errors=%u total=1000000\n", u16tmp);
+
+		c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
+		c->post_bit_error.stat[0].uvalue = dev->post_bit_error;
+		c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
+		c->post_bit_count.stat[0].uvalue = dev->post_bit_count;
+	} else {
+		c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	}
+
 err_schedule_delayed_work:
 	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
 	return;

drivers/media/dvb-frontends/rtl2830_priv.h

@@ -32,6 +32,8 @@ struct rtl2830_dev {
 	u8 page; /* active register page */
 	struct delayed_work stat_work;
 	fe_status_t fe_status;
+	u64 post_bit_error;
+	u64 post_bit_count;
 };
 
 struct rtl2830_reg_val_mask {