From: Luca Weiss <luca.weiss@fairphone.com>
Date: Mon, 9 Dec 2024 12:01:06 +0000 (+0100)
Subject: media: qcom: camss: Restrict endpoint bus-type to D-PHY
X-Git-Tag: v6.16-rc1~145^2~288
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bce4c094c27268b6148906a0ed43ff02a39522da;p=thirdparty%2Fkernel%2Flinux.git

media: qcom: camss: Restrict endpoint bus-type to D-PHY

Currently the Qualcomm CAMSS driver only supports D-PHY while the
hardware on most SoCs also supports C-PHY. Until this support is added,
check for D-PHY to make it somewhat explicit that C-PHY won't work.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Tested-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Bryan O'Donoghue <bod@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
---

diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index 6791dfea91b13..8fcfe06449bf9 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -2663,6 +2663,15 @@ static int camss_of_parse_endpoint_node(struct device *dev,
 	if (ret)
 		return ret;
 
+	/*
+	 * Most SoCs support both D-PHY and C-PHY standards, but currently only
+	 * D-PHY is supported in the driver.
+	 */
+	if (vep.bus_type != V4L2_MBUS_CSI2_DPHY) {
+		dev_err(dev, "Unsupported bus type %d\n", vep.bus_type);
+		return -EINVAL;
+	}
+
 	csd->interface.csiphy_id = vep.base.port;
 
 	mipi_csi2 = &vep.bus.mipi_csi2;