Message ID | 20210330173348.30135-4-p.yadav@ti.com (mailing list archive) |
---|---|
State | Superseded, archived |
Headers |
Received: from vger.kernel.org ([23.128.96.18]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from <linux-media-owner@vger.kernel.org>) id 1lRIGs-004pRt-AM; Tue, 30 Mar 2021 17:35:18 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232118AbhC3Ren (ORCPT <rfc822;mkrufky@linuxtv.org> + 1 other); Tue, 30 Mar 2021 13:34:43 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:59616 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231650AbhC3Red (ORCPT <rfc822;linux-media@vger.kernel.org>); Tue, 30 Mar 2021 13:34:33 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 12UHYEB8057026; Tue, 30 Mar 2021 12:34:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1617125654; bh=1pR43CdbgvQt4BcjIFxp/YBsY0FByo4R7bLIiRN2yqQ=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=IixW8RHl+OxFGXLIFDSqgn/T5bdagn3IUcv678zOw27hTEkj1CPbRVpzy+dEce+Kt zmwOcyIyYoUCvaGu9iac+i47FuJpW2YTJAY0qVeLz6uY591y7WNzWV8kz1FBltUJVA ovsLBjhZGJS/l1O7ZDsB/1IZNdplMwmKOuo8GOuE= Received: from DFLE114.ent.ti.com (dfle114.ent.ti.com [10.64.6.35]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 12UHYEv8039233 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 30 Mar 2021 12:34:14 -0500 Received: from DFLE102.ent.ti.com (10.64.6.23) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Tue, 30 Mar 2021 12:34:14 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Tue, 30 Mar 2021 12:34:14 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 12UHXmgk125244; Tue, 30 Mar 2021 12:34:08 -0500 From: Pratyush Yadav <p.yadav@ti.com> To: Mauro Carvalho Chehab <mchehab@kernel.org>, Rob Herring <robh+dt@kernel.org>, Kishon Vijay Abraham I <kishon@ti.com>, Vinod Koul <vkoul@kernel.org>, Peter Ujfalusi <peter.ujfalusi@gmail.com>, Maxime Ripard <mripard@kernel.org>, Benoit Parrot <bparrot@ti.com>, Hans Verkuil <hverkuil-cisco@xs4all.nl>, Alexandre Courbot <acourbot@chromium.org>, Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Stanimir Varbanov <stanimir.varbanov@linaro.org>, Helen Koike <helen.koike@collabora.com>, Michael Tretter <m.tretter@pengutronix.de>, Peter Chen <peter.chen@nxp.com>, Chunfeng Yun <chunfeng.yun@mediatek.com>, <linux-media@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-phy@lists.infradead.org>, <dmaengine@vger.kernel.org> CC: Pratyush Yadav <p.yadav@ti.com>, Vignesh Raghavendra <vigneshr@ti.com>, Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Subject: [PATCH 03/16] phy: cdns-dphy: Allow setting mode Date: Tue, 30 Mar 2021 23:03:35 +0530 Message-ID: <20210330173348.30135-4-p.yadav@ti.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210330173348.30135-1-p.yadav@ti.com> References: <20210330173348.30135-1-p.yadav@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: <linux-media.vger.kernel.org> X-Mailing-List: linux-media@vger.kernel.org X-LSpam-Score: -2.5 (--) X-LSpam-Report: No, score=-2.5 required=5.0 tests=BAYES_00=-1.9,DKIMWL_WL_HIGH=0.001,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1 autolearn=ham autolearn_force=no |
Series |
CSI2RX support on J721E
|
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Commit Message
Pratyush Yadav
March 30, 2021, 5:33 p.m. UTC
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.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
---
drivers/phy/cadence/cdns-dphy.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
Comments
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 <p.yadav@ti.com> > --- > 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)
On 02/04/21 01:38PM, Laurent Pinchart wrote: > 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). I'm not sure if the DPHY can work in both RX and TX mode but the documentation for Cadence DPHY on J721E does include both RX and TX related registers. Also, take a look at [0] which says that the Allwinner A31 DPHY can work in both RX and TX mode. So apparently there are some DPHYs like that in the wild. [0] https://lore.kernel.org/linux-arm-kernel/20201023174546.504028-3-paul.kocialkowski@bootlin.com/ > > > Signed-off-by: Pratyush Yadav <p.yadav@ti.com> > > --- > > 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
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)