From 6b45778609dbe4e7d03abe9482a1a5621e2a3e64 Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Tue, 2 Sep 2014 05:03:21 -0300 Subject: [PATCH] [media] af9033: wrap DVBv3 read SNR to DVBv5 CNR Remove 'duplicate' DVBv3 read SNR implementation and return value, calculated already by DVBv5 CNR, from the cache. Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/af9033.c | 52 ++++--------------------------- drivers/media/dvb-frontends/af9033_priv.h | 1 + 2 files changed, 7 insertions(+), 46 deletions(-) diff --git a/drivers/media/dvb-frontends/af9033.c b/drivers/media/dvb-frontends/af9033.c index 576e9b5..4c20616 100644 --- a/drivers/media/dvb-frontends/af9033.c +++ b/drivers/media/dvb-frontends/af9033.c @@ -832,55 +832,15 @@ err: static int af9033_read_snr(struct dvb_frontend *fe, u16 *snr) { struct af9033_dev *dev = fe->demodulator_priv; - int ret, i, len; - u8 buf[3], tmp; - u32 snr_val; - const struct val_snr *snr_lut; - - /* read value */ - ret = af9033_rd_regs(dev, 0x80002c, buf, 3); - if (ret < 0) - goto err; - - snr_val = (buf[2] << 16) | (buf[1] << 8) | buf[0]; - - /* read current modulation */ - ret = af9033_rd_reg(dev, 0x80f903, &tmp); - if (ret < 0) - goto err; - - switch ((tmp >> 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; - } - - for (i = 0; i < len; i++) { - tmp = snr_lut[i].snr; - - if (snr_val < snr_lut[i].val) - break; - } + struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; - *snr = tmp * 10; /* dB/10 */ + /* use DVBv5 CNR */ + if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL) + *snr = div_s64(c->cnr.stat[0].svalue, 100); /* 1000x => 10x */ + else + *snr = 0; return 0; - -err: - dev_dbg(&dev->client->dev, "failed=%d\n", ret); - - return ret; } static int af9033_read_signal_strength(struct dvb_frontend *fe, u16 *strength) diff --git a/drivers/media/dvb-frontends/af9033_priv.h b/drivers/media/dvb-frontends/af9033_priv.h index ded7b67..c12c92c 100644 --- a/drivers/media/dvb-frontends/af9033_priv.h +++ b/drivers/media/dvb-frontends/af9033_priv.h @@ -24,6 +24,7 @@ #include "dvb_frontend.h" #include "af9033.h" +#include struct reg_val { u32 reg; -- 2.7.4