From: Richard Acayan <mailingradian@gmail.com>
Date: Wed, 11 Mar 2026 02:03:28 +0000 (-0400)
Subject: media: i2c: imx355: Restrict data lanes to 4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3ac6212df604f7f33c2f5b2de19dbbf7b5aaad6;p=thirdparty%2Fkernel%2Fstable.git

media: i2c: imx355: Restrict data lanes to 4

The IMX355 sensor driver currently supports having 4 data lanes. There
can't be more or less, so check if the firmware specifies 4 lanes.

Suggested-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Link: https://lore.kernel.org/r/aW3uFcT1zmiF4GUP@kekkonen.localdomain
Signed-off-by: Richard Acayan <mailingradian@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
---

diff --git a/drivers/media/i2c/imx355.c b/drivers/media/i2c/imx355.c
index 9ca87488c933..27a5c212a527 100644
--- a/drivers/media/i2c/imx355.c
+++ b/drivers/media/i2c/imx355.c
@@ -66,6 +66,9 @@
 #define IMX355_EXT_CLK			19200000
 #define IMX355_LINK_FREQ_INDEX		0
 
+/* number of data lanes */
+#define IMX355_DATA_LANES		4
+
 struct imx355_reg {
 	u16 address;
 	u8 val;
@@ -1705,6 +1708,9 @@ static struct imx355_hwcfg *imx355_get_hwcfg(struct device *dev)
 	if (!cfg)
 		goto out_err;
 
+	if (bus_cfg.bus.mipi_csi2.num_data_lanes != IMX355_DATA_LANES)
+		goto out_err;
+
 	ret = v4l2_link_freq_to_bitmap(dev, bus_cfg.link_frequencies,
 				       bus_cfg.nr_of_link_frequencies,
 				       link_freq_menu_items,