From patchwork Thu Oct 15 18:27:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 286213 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D42DC43467 for ; Thu, 15 Oct 2020 16:27:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 06E2F2225A for ; Thu, 15 Oct 2020 16:27:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389826AbgJOQ1m (ORCPT ); Thu, 15 Oct 2020 12:27:42 -0400 Received: from relay9-d.mail.gandi.net ([217.70.183.199]:36583 "EHLO relay9-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389721AbgJOQ1m (ORCPT ); Thu, 15 Oct 2020 12:27:42 -0400 X-Originating-IP: 93.34.118.233 Received: from uno.lan (93-34-118-233.ip49.fastwebnet.it [93.34.118.233]) (Authenticated sender: jacopo@jmondi.org) by relay9-d.mail.gandi.net (Postfix) with ESMTPSA id 3173CFF805; Thu, 15 Oct 2020 16:27:38 +0000 (UTC) From: Jacopo Mondi To: kieran.bingham+renesas@ideasonboard.com, laurent.pinchart+renesas@ideasonboard.com, niklas.soderlund+renesas@ragnatech.se Cc: Jacopo Mondi , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Hyun Kwon , Manivannan Sadhasivam Subject: [PATCH v2 3/7] media: i2c: max9286: Break-out reverse channel setup Date: Thu, 15 Oct 2020 20:27:06 +0200 Message-Id: <20201015182710.54795-4-jacopo+renesas@jmondi.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201015182710.54795-1-jacopo+renesas@jmondi.org> References: <20201015182710.54795-1-jacopo+renesas@jmondi.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Break out the reverse channel setup configuration procedure to its own function. This change prepares for configuring the reverse channel conditionally to the remote side high threshold configuration. No functional changes intended. Signed-off-by: Jacopo Mondi Reviewed-by: Kieran Bingham --- drivers/media/i2c/max9286.c | 30 +++++++++++++++++------------- 1 file changed, 17 insertions(+), 13 deletions(-) diff --git a/drivers/media/i2c/max9286.c b/drivers/media/i2c/max9286.c index d969ac21a058..89a7248f5c25 100644 --- a/drivers/media/i2c/max9286.c +++ b/drivers/media/i2c/max9286.c @@ -906,6 +906,22 @@ static void max9286_v4l2_unregister(struct max9286_priv *priv) * Probe/Remove */ +static void max9286_reverse_channel_setup(struct max9286_priv *priv) +{ + /* + * Reverse channel setup. + * + * - Enable custom reverse channel configuration (through register 0x3f) + * and set the first pulse length to 35 clock cycles. + * - Increase the reverse channel amplitude to 170mV to accommodate the + * high threshold enabled by the serializer driver. + */ + max9286_write(priv, 0x3f, MAX9286_EN_REV_CFG | MAX9286_REV_FLEN(35)); + max9286_write(priv, 0x3b, MAX9286_REV_TRF(1) | MAX9286_REV_AMP(70) | + MAX9286_REV_AMP_X); + usleep_range(2000, 2500); +} + static int max9286_setup(struct max9286_priv *priv) { /* @@ -941,19 +957,7 @@ static int max9286_setup(struct max9286_priv *priv) * only. This should be disabled after the mux is initialised. */ max9286_configure_i2c(priv, true); - - /* - * Reverse channel setup. - * - * - Enable custom reverse channel configuration (through register 0x3f) - * and set the first pulse length to 35 clock cycles. - * - Increase the reverse channel amplitude to 170mV to accommodate the - * high threshold enabled by the serializer driver. - */ - max9286_write(priv, 0x3f, MAX9286_EN_REV_CFG | MAX9286_REV_FLEN(35)); - max9286_write(priv, 0x3b, MAX9286_REV_TRF(1) | MAX9286_REV_AMP(70) | - MAX9286_REV_AMP_X); - usleep_range(2000, 2500); + max9286_reverse_channel_setup(priv); /* * Enable GMSL links, mask unused ones and autodetect link