From patchwork Sun Nov 5 14:25:10 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Schwarzott X-Patchwork-Id: 45340 Received: from vger.kernel.org ([209.132.180.67]) by www.linuxtv.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eBLrk-000262-BA; Sun, 05 Nov 2017 14:25:36 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751350AbdKEOZd (ORCPT + 1 other); Sun, 5 Nov 2017 09:25:33 -0500 Received: from smtp.gentoo.org ([140.211.166.183]:44720 "EHLO smtp.gentoo.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751307AbdKEOZc (ORCPT ); Sun, 5 Nov 2017 09:25:32 -0500 Received: from gauss.fritz.box (unknown [IPv6:2001:a62:2d3:2e01:553e:3623:3ead:cddd]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: zzam) by smtp.gentoo.org (Postfix) with ESMTPSA id A37B633D3C7; Sun, 5 Nov 2017 14:25:31 +0000 (UTC) From: Matthias Schwarzott To: mchehab@kernel.org, linux-media@vger.kernel.org Cc: Matthias Schwarzott Subject: [PATCH 14/15] si2165: Add DVBv3 wrapper for ber statistics Date: Sun, 5 Nov 2017 15:25:10 +0100 Message-Id: <20171105142511.16563-14-zzam@gentoo.org> X-Mailer: git-send-email 2.15.0 In-Reply-To: <20171105142511.16563-1-zzam@gentoo.org> References: <20171105142511.16563-1-zzam@gentoo.org> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add read_ber function that reads from property cache to support DVBv3. The implementation is inspired by the cx24120 driver. Signed-off-by: Matthias Schwarzott --- drivers/media/dvb-frontends/si2165.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/media/dvb-frontends/si2165.c b/drivers/media/dvb-frontends/si2165.c index ceb5a2bb0dea..2ad6409dd6b1 100644 --- a/drivers/media/dvb-frontends/si2165.c +++ b/drivers/media/dvb-frontends/si2165.c @@ -57,6 +57,9 @@ struct si2165_state { u32 sys_clk; u32 adc_clk; + /* DVBv3 stats */ + u64 ber_prev; + bool has_dvbc; bool has_dvbt; bool firmware_loaded; @@ -757,6 +760,12 @@ static int si2165_read_status(struct dvb_frontend *fe, enum fe_status *status) c->post_bit_error.stat[0].uvalue = 0; c->post_bit_count.stat[0].uvalue = 0; + /* + * reset DVBv3 value to deliver a good result + * for the first call + */ + state->ber_prev = 0; + } else { ret = si2165_readreg8(state, REG_BER_AVAIL, &u8tmp); if (ret < 0) @@ -805,6 +814,22 @@ static int si2165_read_snr(struct dvb_frontend *fe, u16 *snr) return 0; } +static int si2165_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + struct si2165_state *state = fe->demodulator_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + if (c->post_bit_error.stat[0].scale != FE_SCALE_COUNTER) { + *ber = 0; + return 0; + } + + *ber = c->post_bit_error.stat[0].uvalue - state->ber_prev; + state->ber_prev = c->post_bit_error.stat[0].uvalue; + + return 0; +} + static int si2165_set_oversamp(struct si2165_state *state, u32 dvb_rate) { u64 oversamp; @@ -1123,6 +1148,7 @@ static const struct dvb_frontend_ops si2165_ops = { .set_frontend = si2165_set_frontend, .read_status = si2165_read_status, .read_snr = si2165_read_snr, + .read_ber = si2165_read_ber, }; static int si2165_probe(struct i2c_client *client,