From patchwork Tue Jun 20 17:45:05 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Scheller X-Patchwork-Id: 9800031 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 8652560329 for ; Tue, 20 Jun 2017 17:45:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 79E252223E for ; Tue, 20 Jun 2017 17:45:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6E5102624B; Tue, 20 Jun 2017 17:45:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FROM, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1AB9F2223E for ; Tue, 20 Jun 2017 17:45:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751175AbdFTRpQ (ORCPT ); Tue, 20 Jun 2017 13:45:16 -0400 Received: from mail-wr0-f194.google.com ([209.85.128.194]:36532 "EHLO mail-wr0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751133AbdFTRpO (ORCPT ); Tue, 20 Jun 2017 13:45:14 -0400 Received: by mail-wr0-f194.google.com with SMTP id 77so19155794wrb.3 for ; Tue, 20 Jun 2017 10:45:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=ZXCxqIwwOVGY1trx+U2X0WqMWKK/Jn3rPi1Op5aDwCk=; b=iLEX7kUA+Q/jjmdKA1l8+sNDg2lx0X/UB19EZAXKeWfmTPcpBAw0YbwxVc7tlqJl3x PSJA6kN6dfu/WkcdXD8+NKp8bK5OjZpuWeGE8taDbnIbam1kwNjSUKjO+9yjOJDTpURq 1gHEPHhj7Qd55kRsRYol4839X1NWn4OJsyXYjuxp0T2+e2mq4aAID/9SiXKK0s9JJ4bv SG9A/8Mn41pvZdLb+zw3Fd9a7l18EtjDTCW2YqQN26gbLiBXHXeNNPwnEAUoOZX4+Bxk GZMHAaw9p2dT7HFQuABDxPje57dqsFADNHx6h6q71fq2qfEfcEbR+mvyOz9xK9giNHnW VJLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=ZXCxqIwwOVGY1trx+U2X0WqMWKK/Jn3rPi1Op5aDwCk=; b=JaQjb+ARsIWSDXK1JhwxiOFPVEuJWYrHpoavdR+ISrpOi6cDrd8FRptC9ZGbogvRK0 DijZMKSFCJ7cTALE4MbGu0EzUXvYOngoVYz8spt+V2h1CuTHWCZjxfcowdAuuwBMeDrB Hj9fIYY1htoc1mpQWvJDF89iofRJpw9edMCx1O0dkOPcGHX5cjdZkDnrfYVty0gzqnXq HF6t20j5jHLGVlsZ9z78DU4dY4eu464m0h5lAI/N7rSAPpK+9Lonhc9/c/L7JnC2Vjy8 xw+oQVejXivXQ3BMe4kdHRzvmo1DpSahPFSpZICgZGhZgEsf3tkL09paPMtv7XJRdZu0 h2DQ== X-Gm-Message-State: AKS2vOwFwov8DG5eKwLCyT6gPZWa6nKcgiH4+RmhD0jReg45aAlNYl14 n6JbPbrIVFSuMgBE X-Received: by 10.223.152.20 with SMTP id v20mr23200204wrb.8.1497980713223; Tue, 20 Jun 2017 10:45:13 -0700 (PDT) Received: from dvbdev.wuest.de (ip-37-24-178-151.hsi14.unitymediagroup.de. [37.24.178.151]) by smtp.gmail.com with ESMTPSA id e130sm18622962wmf.10.2017.06.20.10.45.12 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 20 Jun 2017 10:45:12 -0700 (PDT) From: Daniel Scheller To: linux-media@vger.kernel.org, mchehab@kernel.org, mchehab@s-opensource.com Cc: liplianin@netup.ru, rjkm@metzlerbros.de Subject: [PATCH 3/4] [media] dvb-frontends/stv0367: SNR DVBv5 statistics for DVB-C and T Date: Tue, 20 Jun 2017 19:45:05 +0200 Message-Id: <20170620174506.7593-4-d.scheller.oss@gmail.com> X-Mailer: git-send-email 2.13.0 In-Reply-To: <20170620174506.7593-1-d.scheller.oss@gmail.com> References: <20170620174506.7593-1-d.scheller.oss@gmail.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Daniel Scheller Add signal-to-noise-ratio as provided by the demodulator in decibel scale. QAM/DVB-C needs some intlog calculation to have usable dB values, OFDM/ DVB-T values from the demod look alright already and are provided as-is. Signed-off-by: Daniel Scheller --- drivers/media/dvb-frontends/stv0367.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/media/dvb-frontends/stv0367.c b/drivers/media/dvb-frontends/stv0367.c index bb498f942ebd..0b13a407df23 100644 --- a/drivers/media/dvb-frontends/stv0367.c +++ b/drivers/media/dvb-frontends/stv0367.c @@ -25,6 +25,8 @@ #include #include +#include "dvb_math.h" + #include "stv0367.h" #include "stv0367_defs.h" #include "stv0367_regs.h" @@ -33,6 +35,9 @@ /* Max transfer size done by I2C transfer functions */ #define MAX_XFER_SIZE 64 +/* snr logarithmic calc */ +#define INTLOG10X100(x) ((u32) (((u64) intlog10(x) * 100) >> 24)) + static int stvdebug; module_param_named(debug, stvdebug, int, 0644); @@ -3013,6 +3018,33 @@ static int stv0367ddb_read_status(struct dvb_frontend *fe, return -EINVAL; } +static void stv0367ddb_read_snr(struct dvb_frontend *fe) +{ + struct stv0367_state *state = fe->demodulator_priv; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + int cab_pwr; + u32 regval, tmpval, snrval = 0; + + switch (state->activedemod) { + case demod_ter: + snrval = stv0367ter_snr_readreg(fe); + break; + case demod_cab: + cab_pwr = stv0367cab_snr_power(fe); + regval = stv0367cab_snr_readreg(fe, 0); + + tmpval = (cab_pwr * 320) / regval; + snrval = ((tmpval != 0) ? INTLOG10X100(tmpval) : 0) * 100; + break; + default: + p->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + return; + } + + p->cnr.stat[0].scale = FE_SCALE_DECIBEL; + p->cnr.stat[0].uvalue = snrval; +} + static void stv0367ddb_read_ucblocks(struct dvb_frontend *fe) { struct stv0367_state *state = fe->demodulator_priv; @@ -3069,6 +3101,7 @@ static int stv0367ddb_get_frontend(struct dvb_frontend *fe, } stv0367ddb_read_ucblocks(fe); + stv0367ddb_read_snr(fe); return 0; }