From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.kapsi.fi ([217.30.184.167]:44807 "EHLO mail.kapsi.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757088AbaIDChE (ORCPT ); Wed, 3 Sep 2014 22:37:04 -0400 From: Antti Palosaari To: linux-media@vger.kernel.org Cc: Antti Palosaari Subject: [PATCH 31/37] af9033: implement DVBv5 statistic for CNR Date: Thu, 4 Sep 2014 05:36:39 +0300 Message-Id: <1409798205-25645-31-git-send-email-crope@iki.fi> In-Reply-To: <1409798205-25645-1-git-send-email-crope@iki.fi> References: <1409798205-25645-1-git-send-email-crope@iki.fi> Sender: linux-media-owner@vger.kernel.org List-ID: Return CNR via DVBv5 statistic API. Signed-off-by: Antti Palosaari --- drivers/media/dvb-frontends/af9033.c | 54 ++++++++++++++++++++++++++++++++++-- 1 file changed, 52 insertions(+), 2 deletions(-) diff --git a/drivers/media/dvb-frontends/af9033.c b/drivers/media/dvb-frontends/af9033.c index b9a0b00..576e9b5 100644 --- a/drivers/media/dvb-frontends/af9033.c +++ b/drivers/media/dvb-frontends/af9033.c @@ -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: -- http://palosaari.fi/