Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932108AbaKLBZg (ORCPT ); Tue, 11 Nov 2014 20:25:36 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:58838 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754247AbaKLBZc (ORCPT ); Tue, 11 Nov 2014 20:25:32 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ulrich Eckhardt , Mauro Carvalho Chehab Subject: [PATCH 3.17 120/319] media: ds3000: fix LNB supply voltage on Tevii S480 on initialization Date: Wed, 12 Nov 2014 10:14:18 +0900 Message-Id: <20141112011012.463408627@linuxfoundation.org> X-Mailer: git-send-email 2.1.3 In-Reply-To: <20141112010952.553519040@linuxfoundation.org> References: <20141112010952.553519040@linuxfoundation.org> User-Agent: quilt/0.63-1 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ulrich Eckhardt commit 8c5bcded11cb607b1bb5920de3b9c882136d27db upstream. The Tevii S480 outputs 18V on startup for the LNB supply voltage and does not automatically power down. This blocks other receivers connected to a satellite channel router (EN50494), since the receivers can not send the required DiSEqC sequences when the Tevii card is connected to a the same SCR. This patch switches off the LNB supply voltage on initialization of the frontend. [mchehab@osg.samsung.com: add a comment about why we're explicitly turning off voltage at device init] Signed-off-by: Ulrich Eckhardt Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/dvb-frontends/ds3000.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/drivers/media/dvb-frontends/ds3000.c +++ b/drivers/media/dvb-frontends/ds3000.c @@ -864,6 +864,13 @@ struct dvb_frontend *ds3000_attach(const memcpy(&state->frontend.ops, &ds3000_ops, sizeof(struct dvb_frontend_ops)); state->frontend.demodulator_priv = state; + + /* + * Some devices like T480 starts with voltage on. Be sure + * to turn voltage off during init, as this can otherwise + * interfere with Unicable SCR systems. + */ + ds3000_set_voltage(&state->frontend, SEC_VOLTAGE_OFF); return &state->frontend; error3: -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/