From mboxrd@z Thu Jan 1 00:00:00 1970 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 DDE70C43461 for ; Fri, 2 Apr 2021 10:39:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 96CEA61151 for ; Fri, 2 Apr 2021 10:39:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234991AbhDBKjB (ORCPT ); Fri, 2 Apr 2021 06:39:01 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:45166 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229599AbhDBKjA (ORCPT ); Fri, 2 Apr 2021 06:39:00 -0400 Received: from pendragon.ideasonboard.com (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 971302C1; Fri, 2 Apr 2021 12:38:57 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1617359937; bh=sZR3sSwoDUoM230emJjHnzx6XJSMp3h9iknmHtUO+6o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=PnzgGaeI8fPjY7zLqQdiAZL2gQRYwL1i95ib4yqkJ7OKrubESUo8UW3CMttNCmK29 ntUF9VYXsSqRUcUemNLmlWBwgd/RamQ8IbN2Z8g5To+DevHUPaBzPEbhKHxmtp49aZ /cEt+POVga0378zGBuzX4DijdKe1QJXTZ8YYaSLc= Date: Fri, 2 Apr 2021 13:38:13 +0300 From: Laurent Pinchart To: Pratyush Yadav Cc: Mauro Carvalho Chehab , Rob Herring , Kishon Vijay Abraham I , Vinod Koul , Peter Ujfalusi , Maxime Ripard , Benoit Parrot , Hans Verkuil , Alexandre Courbot , Stanimir Varbanov , Helen Koike , Michael Tretter , Peter Chen , Chunfeng Yun , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, dmaengine@vger.kernel.org, Vignesh Raghavendra , Tomi Valkeinen Subject: Re: [PATCH 03/16] phy: cdns-dphy: Allow setting mode Message-ID: References: <20210330173348.30135-1-p.yadav@ti.com> <20210330173348.30135-4-p.yadav@ti.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210330173348.30135-4-p.yadav@ti.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Pratyush, Thank you for the patch. On Tue, Mar 30, 2021 at 11:03:35PM +0530, Pratyush Yadav wrote: > Allow callers to set the PHY mode. The main mode should always be > PHY_MODE_MIPI_DPHY but the submode can either be > PHY_MIPI_DPHY_SUBMODE_RX or PHY_MIPI_DPHY_SUBMODE_TX. Update the ops > based on the requested submode. Isn't a given DPHY instance always meant to work in one particular mode ? I can't really imagine a single instance of this IP core being integrated in a way that it can be used in either RX or TX mode. It seems better to select the mode through DT, by describing if the DPHY is an RX or TX (possibly through different compatible strings). > Signed-off-by: Pratyush Yadav > --- > drivers/phy/cadence/cdns-dphy.c | 30 ++++++++++++++++++++++++++++++ > 1 file changed, 30 insertions(+) > > diff --git a/drivers/phy/cadence/cdns-dphy.c b/drivers/phy/cadence/cdns-dphy.c > index 8656f2102a91..7d5f7b333893 100644 > --- a/drivers/phy/cadence/cdns-dphy.c > +++ b/drivers/phy/cadence/cdns-dphy.c > @@ -365,11 +365,41 @@ static int cdns_dphy_configure(struct phy *phy, union phy_configure_opts *opts) > return 0; > } > > +static int cdns_dphy_set_mode(struct phy *phy, enum phy_mode mode, int submode) > +{ > + struct cdns_dphy *dphy = phy_get_drvdata(phy); > + const struct cdns_dphy_driver_data *ddata; > + > + ddata = of_device_get_match_data(dphy->dev); > + if (!ddata) > + return -EINVAL; > + > + if (mode != PHY_MODE_MIPI_DPHY) > + return -EINVAL; > + > + if (submode == PHY_MIPI_DPHY_SUBMODE_TX) { > + if (!ddata->tx) > + return -EOPNOTSUPP; > + > + dphy->ops = ddata->tx; > + } else if (submode == PHY_MIPI_DPHY_SUBMODE_RX) { > + if (!ddata->rx) > + return -EOPNOTSUPP; > + > + dphy->ops = ddata->rx; > + } else { > + return -EOPNOTSUPP; > + } > + > + return 0; > +} > + > static const struct phy_ops cdns_dphy_ops = { > .configure = cdns_dphy_configure, > .validate = cdns_dphy_validate, > .power_on = cdns_dphy_power_on, > .power_off = cdns_dphy_power_off, > + .set_mode = cdns_dphy_set_mode, > }; > > static int cdns_dphy_probe(struct platform_device *pdev) -- Regards, Laurent Pinchart