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Mon, 16 Feb 2026 16:27:58 -0800 (PST) From: Richard Acayan To: Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Robert Foss , Todor Tomov , "Bryan O'Donoghue" , Vladimir Zapolskiy , Bjorn Andersson , Konrad Dybcio , Tianshu Qiu , Sakari Ailus , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org Cc: Robert Mader , David Heidelberg , phone-devel@vger.kernel.org, Richard Acayan Subject: [PATCH v9 4/7] media: i2c: imx355: Restrict data lanes to 4 Date: Mon, 16 Feb 2026 19:27:35 -0500 Message-ID: <20260217002738.133534-5-mailingradian@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260217002738.133534-1-mailingradian@gmail.com> References: <20260217002738.133534-1-mailingradian@gmail.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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. Existing ACPI hardware descriptions may not have the data lanes defined so this check also accepts a placeholder of 0 lanes. Suggested-by: Sakari Ailus Link: https://lore.kernel.org/r/aW3uFcT1zmiF4GUP@kekkonen.localdomain Signed-off-by: Richard Acayan --- drivers/media/i2c/imx355.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/media/i2c/imx355.c b/drivers/media/i2c/imx355.c index 9ca87488c933..0d6aabea7d59 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 +1708,10 @@ static struct imx355_hwcfg *imx355_get_hwcfg(struct device *dev) if (!cfg) goto out_err; + if (bus_cfg.bus.mipi_csi2.num_data_lanes != 0 + && 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, -- 2.53.0