linux-kernel - [PATCH v2 2/3] media: imx-mipi-csis: Store the number of data

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Message-ID: <20250903102243.1563527-3-isaac.scott@ideasonboard.com>
Date: Wed,  3 Sep 2025 11:22:41 +0100
From: Isaac Scott <isaac.scott@...asonboard.com>
To: laurent.pinchart@...asonboard.com
Cc: rmfrfs@...il.com,
	martink@...teo.de,
	kernel@...i.sm,
	mchehab@...nel.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	linux-media@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	hverkuil@...nel.org,
	nicolas.dufresne@...labora.com,
	sakari.ailus@...ux.intel.com,
	tomi.valkeinen@...asonboard.com,
	jonas@...boo.se,
	dan.scally+renesas@...asonboard.com,
	m.szyprowski@...sung.com,
	mehdi.djait@...ux.intel.com,
	niklas.soderlund+renesas@...natech.se,
	Isaac Scott <isaac.scott@...asonboard.com>
Subject: [PATCH v2 2/3] media: imx-mipi-csis: Store the number of data_lanes configured in dt

The number of lanes actively used by a MIPI CSI transmitter may differ
from that which is defined in device tree. To allow us to be able to set
the number of configured lanes without changing the maximum lane count,
store the number of lanes configured in device tree, and adjust the
debug print to reflect the device tree value.

Signed-off-by: Isaac Scott <isaac.scott@...asonboard.com>
---
 drivers/media/platform/nxp/imx-mipi-csis.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/nxp/imx-mipi-csis.c b/drivers/media/platform/nxp/imx-mipi-csis.c
index 2beb5f43c2c0..fc89325f2f94 100644
--- a/drivers/media/platform/nxp/imx-mipi-csis.c
+++ b/drivers/media/platform/nxp/imx-mipi-csis.c
@@ -313,6 +313,8 @@ struct mipi_csis_device {
 	u32 hs_settle;
 	u32 clk_settle;
 
+	unsigned int max_data_lanes;
+
 	spinlock_t slock;	/* Protect events */
 	struct mipi_csis_event events[MIPI_CSIS_NUM_EVENTS];
 	struct dentry *debugfs_root;
@@ -1299,8 +1301,9 @@ static int mipi_csis_async_register(struct mipi_csis_device *csis)
 	}
 
 	csis->bus = vep.bus.mipi_csi2;
+	csis->max_data_lanes = vep.bus.mipi_csi2.num_data_lanes;
 
-	dev_dbg(csis->dev, "data lanes: %d\n", csis->bus.num_data_lanes);
+	dev_dbg(csis->dev, "data lanes: %d\n", csis->max_data_lanes);
 	dev_dbg(csis->dev, "flags: 0x%08x\n", csis->bus.flags);
 
 	asd = v4l2_async_nf_add_fwnode_remote(&csis->notifier, ep,
-- 
2.43.0