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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>,
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        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>,
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        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>
In-Reply-To: <20210330173348.30135-1-p.yadav@ti.com>
References: <20210330173348.30135-1-p.yadav@ti.com>
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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(+)

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)
-- 
2.30.0