linux-kernel - [PATCH v10 06/13] media: cadence: csi2rx: Configure DPHY using link freq

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20231009-upstream_csi-v10-6-330aaed24c5d@ti.com>
Date:   Mon, 9 Oct 2023 18:39:32 +0530
From:   Jai Luthra <j-luthra@...com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
CC:     <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        <niklas.soderlund+renesas@...natech.se>,
        Benoit Parrot <bparrot@...com>,
        Vaishnav Achath <vaishnav.a@...com>,
        Vignesh Raghavendra <vigneshr@...com>, <nm@...com>,
        <devarsht@...com>, <j-luthra@...com>, <a-bhatia1@...com>,
        Martyn Welch <martyn.welch@...labora.com>,
        Julien Massot <julien.massot@...labora.com>
Subject: [PATCH v10 06/13] media: cadence: csi2rx: Configure DPHY using link freq

From: Pratyush Yadav <p.yadav@...com>

Some platforms like TI's J721E can have the CSI2RX paired with an
external DPHY. Use the generic PHY framework to configure the DPHY with
the correct link frequency.

Signed-off-by: Pratyush Yadav <p.yadav@...com>
Tested-by: Julien Massot <julien.massot@...labora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Reviewed-by: Maxime Ripard <mripard@...nel.org>
Co-developed-by: Jai Luthra <j-luthra@...com>
Signed-off-by: Jai Luthra <j-luthra@...com>
---
 drivers/media/platform/cadence/cdns-csi2rx.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index f9b41451f4a4..77e2413c345a 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -145,8 +145,32 @@ static void csi2rx_reset(struct csi2rx_priv *csi2rx)
 static int csi2rx_configure_ext_dphy(struct csi2rx_priv *csi2rx)
 {
 	union phy_configure_opts opts = { };
+	struct phy_configure_opts_mipi_dphy *cfg = &opts.mipi_dphy;
+	struct v4l2_subdev_format sd_fmt = {
+		.which	= V4L2_SUBDEV_FORMAT_ACTIVE,
+		.pad	= CSI2RX_PAD_SINK,
+	};
+	const struct csi2rx_fmt *fmt;
+	s64 link_freq;
 	int ret;
 
+	ret = v4l2_subdev_call_state_active(&csi2rx->subdev, pad, get_fmt,
+					    &sd_fmt);
+	if (ret < 0)
+		return ret;
+
+	fmt = csi2rx_get_fmt_by_code(sd_fmt.format.code);
+
+	link_freq = v4l2_get_link_freq(csi2rx->source_subdev->ctrl_handler,
+				       fmt->bpp, 2 * csi2rx->num_lanes);
+	if (link_freq < 0)
+		return link_freq;
+
+	ret = phy_mipi_dphy_get_default_config_for_hsclk(link_freq,
+							 csi2rx->num_lanes, cfg);
+	if (ret)
+		return ret;
+
 	ret = phy_power_on(csi2rx->dphy);
 	if (ret)
 		return ret;

-- 
2.42.0