From patchwork Sun Dec 14 08:28:35 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antti Palosaari X-Patchwork-Id: 5487321 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 800E19F1CD for ; Sun, 14 Dec 2014 08:30:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B5CF120A0B for ; Sun, 14 Dec 2014 08:30:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4CDC820A0D for ; Sun, 14 Dec 2014 08:30:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752668AbaLNIaB (ORCPT ); Sun, 14 Dec 2014 03:30:01 -0500 Received: from mail.kapsi.fi ([217.30.184.167]:46204 "EHLO mail.kapsi.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751562AbaLNI3t (ORCPT ); Sun, 14 Dec 2014 03:29:49 -0500 Received: from dyn3-82-128-190-178.psoas.suomi.net ([82.128.190.178] helo=localhost.localdomain.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.72) (envelope-from ) id 1Y04Ym-00086G-1C; Sun, 14 Dec 2014 10:29:48 +0200 From: Antti Palosaari To: linux-media@vger.kernel.org Cc: Antti Palosaari Subject: [PATCH 10/18] rtl2830: implement DVBv5 signal strength statistics Date: Sun, 14 Dec 2014 10:28:35 +0200 Message-Id: <1418545723-9536-10-git-send-email-crope@iki.fi> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1418545723-9536-1-git-send-email-crope@iki.fi> References: <1418545723-9536-1-git-send-email-crope@iki.fi> X-SA-Exim-Connect-IP: 82.128.190.178 X-SA-Exim-Mail-From: crope@iki.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Estimate signal strength from IF AGC. Signed-off-by: Antti Palosaari --- drivers/media/dvb-frontends/rtl2830.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/media/dvb-frontends/rtl2830.c b/drivers/media/dvb-frontends/rtl2830.c index c484634..641047b 100644 --- a/drivers/media/dvb-frontends/rtl2830.c +++ b/drivers/media/dvb-frontends/rtl2830.c @@ -246,6 +246,8 @@ static int rtl2830_init(struct dvb_frontend *fe) goto err; /* init stats here in order signal app which stats are supported */ + c->strength.len = 1; + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; c->cnr.len = 1; c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; /* start statistics polling */ @@ -693,6 +695,28 @@ static void rtl2830_stat_work(struct work_struct *work) dev_dbg(&client->dev, "\n"); + /* signal strength */ + if (dev->fe_status & FE_HAS_SIGNAL) { + struct {signed int x:14; } s; + + /* read IF AGC */ + ret = rtl2830_rd_regs(client, 0x359, buf, 2); + if (ret) + goto err; + + u16tmp = buf[0] << 8 | buf[1] << 0; + u16tmp &= 0x3fff; /* [13:0] */ + tmp = s.x = u16tmp; /* 14-bit bin to 2 complement */ + u16tmp = clamp_val(-4 * tmp + 32767, 0x0000, 0xffff); + + dev_dbg(&client->dev, "IF AGC=%d\n", tmp); + + c->strength.stat[0].scale = FE_SCALE_RELATIVE; + c->strength.stat[0].uvalue = u16tmp; + } else { + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + /* CNR */ if (dev->fe_status & FE_HAS_VITERBI) { unsigned hierarchy, constellation;