linux-kernel - [PATCH v14 12/18] media: i2c: ds90ub960: Configure CSI-2 continuous clock

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Message-Id: <20230616135922.442979-13-tomi.valkeinen@ideasonboard.com>
Date:   Fri, 16 Jun 2023 16:59:16 +0300
From:   Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
        Luca Ceresoli <luca.ceresoli@...tlin.com>,
        Andy Shevchenko <andriy.shevchenko@...el.com>,
        Matti Vaittinen <Matti.Vaittinen@...rohmeurope.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     Wolfram Sang <wsa@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Peter Rosin <peda@...ntia.se>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Michael Tretter <m.tretter@...gutronix.de>,
        Hans Verkuil <hverkuil@...all.nl>,
        Mike Pagano <mpagano@...too.org>,
        Krzysztof Hałasa <khalasa@...p.pl>,
        Marek Vasut <marex@...x.de>,
        Satish Nagireddy <satish.nagireddy@...cruise.com>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: [PATCH v14 12/18] media: i2c: ds90ub960: Configure CSI-2 continuous clock

Use 'clock-noncontinuous' from DT to configure the
continuous/non-continuous clock setting for the TX ports.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
---
 drivers/media/i2c/ds90ub960.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/media/i2c/ds90ub960.c b/drivers/media/i2c/ds90ub960.c
index e101bcf2356a..6b70fa5bb22f 100644
--- a/drivers/media/i2c/ds90ub960.c
+++ b/drivers/media/i2c/ds90ub960.c
@@ -149,6 +149,7 @@
 
 #define UB960_TR_CSI_CTL			0x33
 #define UB960_TR_CSI_CTL_CSI_CAL_EN		BIT(6)
+#define UB960_TR_CSI_CTL_CSI_CONTS_CLOCK	BIT(1)
 #define UB960_TR_CSI_CTL_CSI_ENABLE		BIT(0)
 
 #define UB960_TR_CSI_CTL2			0x34
@@ -485,6 +486,7 @@ struct ub960_txport {
 	u8                      nport;	/* TX port number, and index in priv->txport[] */
 
 	u32 num_data_lanes;
+	bool non_continous_clk;
 };
 
 struct ub960_data {
@@ -1133,6 +1135,9 @@ static int ub960_parse_dt_txport(struct ub960_data *priv,
 		goto err_free_txport;
 	}
 
+	txport->non_continous_clk = vep.bus.mipi_csi2.flags &
+				    V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
+
 	txport->num_data_lanes = vep.bus.mipi_csi2.num_data_lanes;
 
 	if (vep.nr_of_link_frequencies != 1) {
@@ -1744,6 +1749,9 @@ static void ub960_init_tx_port(struct ub960_data *priv,
 
 	csi_ctl |= (4 - txport->num_data_lanes) << 4;
 
+	if (!txport->non_continous_clk)
+		csi_ctl |= UB960_TR_CSI_CTL_CSI_CONTS_CLOCK;
+
 	ub960_txport_write(priv, nport, UB960_TR_CSI_CTL, csi_ctl);
 }
 
-- 
2.34.1