From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-wr0-f170.google.com ([209.85.128.170]:36481 "EHLO mail-wr0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751875AbdFUTpr (ORCPT ); Wed, 21 Jun 2017 15:45:47 -0400 Received: by mail-wr0-f170.google.com with SMTP id c11so93326811wrc.3 for ; Wed, 21 Jun 2017 12:45:47 -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, crope@iki.fi Subject: [PATCH v2 0/4] STV0367/DDB DVBv5 signal statistics Date: Wed, 21 Jun 2017 21:45:40 +0200 Message-Id: <20170621194544.16949-1-d.scheller.oss@gmail.com> Sender: linux-media-owner@vger.kernel.org List-ID: From: Daniel Scheller This series adds DVBv5 statistics support to the new DDB codepath of the stv0367 demodulator driver. The changes utilise already existing functionality (in form of register readouts), but wraps the reads in separate functions so the existing relative scale reporting can be kept as-is, while adding the v5 stats in dB scale where appropriate. >>From my own testing: Reported values look approx. the same as those reported by the cxd2841er driver for both -C and -T. Changes from v1 to v2: - INTLOG10X100() macro for QAM SNR calculation removed and replaced by directly utilising intlog2 plus a div - factored statistics collection into *_read_status() - prevent a possible division by zero (though requires ridiculously good SNR to trigger) - _read_status() doesn't return -EINVAL anymore if no demod state is set, prevents falsely reported errors from inquiries of userspace tools Daniel Scheller (4): [media] dvb-frontends/stv0367: initial DDB DVBv5 stats, implement ucblocks [media] dvb-frontends/stv0367: split SNR determination into functions [media] dvb-frontends/stv0367: SNR DVBv5 statistics for DVB-C and T [media] dvb-frontends/stv0367: DVB-C signal strength statistics drivers/media/dvb-frontends/stv0367.c | 178 ++++++++++++++++++++++++++++------ 1 file changed, 148 insertions(+), 30 deletions(-) -- 2.13.0