From patchwork Sat Jan 15 18:04:23 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 481351 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p0FGAaKU024985 for ; Sat, 15 Jan 2011 16:11:37 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753303Ab1AOQLg (ORCPT ); Sat, 15 Jan 2011 11:11:36 -0500 Received: from mx1.redhat.com ([209.132.183.28]:1027 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752633Ab1AOQLf (ORCPT ); Sat, 15 Jan 2011 11:11:35 -0500 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id p0FGBZU3020916 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Sat, 15 Jan 2011 11:11:35 -0500 Received: from pedra (vpn-234-251.phx2.redhat.com [10.3.234.251]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id p0FG5PY0001803 for ; Sat, 15 Jan 2011 11:11:34 -0500 Date: Sat, 15 Jan 2011 16:04:23 -0200 From: Mauro Carvalho Chehab Cc: Linux Media Mailing List Subject: [PATCH 5/8] [media] mb86a20s: Be sure that device is initialized before starting DVB Message-ID: <20110115160423.327706a3@pedra> In-Reply-To: References: Mime-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 To: unlisted-recipients:; (no To-header on input) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Sat, 15 Jan 2011 16:11:37 +0000 (UTC) diff --git a/drivers/media/dvb/frontends/mb86a20s.c b/drivers/media/dvb/frontends/mb86a20s.c index e06507d..cc4acd2 100644 --- a/drivers/media/dvb/frontends/mb86a20s.c +++ b/drivers/media/dvb/frontends/mb86a20s.c @@ -43,6 +43,8 @@ struct mb86a20s_state { const struct mb86a20s_config *config; struct dvb_frontend frontend; + + bool need_init; }; struct regdata { @@ -382,23 +384,31 @@ static int mb86a20s_initfe(struct dvb_frontend *fe) /* Initialize the frontend */ rc = mb86a20s_writeregdata(state, mb86a20s_init); if (rc < 0) - return rc; + goto err; if (!state->config->is_serial) { regD5 &= ~1; rc = mb86a20s_writereg(state, 0x50, 0xd5); if (rc < 0) - return rc; + goto err; rc = mb86a20s_writereg(state, 0x51, regD5); if (rc < 0) - return rc; + goto err; } if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); - return 0; +err: + if (rc < 0) { + state->need_init = true; + printk(KERN_INFO "mb86a20s: Init failed. Will try again later\n"); + } else { + state->need_init = false; + dprintk("Initialization succeded.\n"); + } + return rc; } static int mb86a20s_read_signal_strength(struct dvb_frontend *fe, u16 *strength) @@ -485,8 +495,22 @@ static int mb86a20s_set_frontend(struct dvb_frontend *fe, if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); + dprintk("Calling tuner set parameters\n"); fe->ops.tuner_ops.set_params(fe, p); + /* + * Make it more reliable: if, for some reason, the initial + * device initialization doesn't happen, initialize it when + * a SBTVD parameters are adjusted. + * + * Unfortunately, due to a hard to track bug at tda829x/tda18271, + * the agc callback logic is not called during DVB attach time, + * causing mb86a20s to not be initialized with Kworld SBTVD. + * So, this hack is needed, in order to make Kworld SBTVD to work. + */ + if (state->need_init) + mb86a20s_initfe(fe); + if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); rc = mb86a20s_writeregdata(state, mb86a20s_reset_reception);