media: Add Himax HM1092 mono NIR sensor driver

This adds a V4L2 subdev driver and DT binding for the Himax HM1092, a 1 megapixel monochrome near-infrared image sensor. On laptops it sits behind the IR camera used for face unlock. It speaks a single MIPI CSI-2 data lane and outputs 10-bit RAW at 560x360.

The driver exposes that one native mode, a test pattern control and the standard fwnode properties (orientation, rotation). It has been tested on real hardware (an ASUS Zenbook A14): the sensor probes, streams, and the on-chip test patterns come through the full CSI-2 pipeline.

The available HM1092 documentation does not describe the test pattern modes. Their menu names are based on output observed during hardware testing; the register programming was recovered from the Windows driver.

The sensor driver and its binding are SoC-neutral, so they are sent on their own through the media tree. The board-level device tree and PHY work that wires this camera up on the ASUS Zenbook A14 will be sent as its own series.

---
Changes in v4:
- dt-bindings: make data-lanes optional for the fixed single-lane sensor, constrain explicit values to <1>, and omit it from the example.
- hm1092: add the copyright notice.
- hm1092: replace the private register representation and write helper
with CCI register sequences and direct CCI writes.
- hm1092: use descriptive test-pattern names based on hardware captures; the available documentation does not identify these modes.
- hm1092: parse fwnode properties before creating controls and set read-only flags after validating control creation.
- hm1092: use the generic get_fmt callback for the fixed sensor mode.
- hm1092: initialize endpoint parsing with the fixed one-lane default, reject other lane configurations, and remove the redundant endpoint presence check.
- hm1092: use fsleep() and null-safe GPIO calls, and apply the requested declaration, brace, return-value and error-path formatting cleanups.
- Link to v3: https://patch.msgid.link/[email protected]

Changes in v3:
- dt-bindings: add the Reviewed-by tag from Conor Dooley.
- hm1092: initialize RAW colorimetry fields in the pad format helper so userspace values cannot leak into subdevice state.
- hm1092: return -ENXIO when the required firmware graph endpoint is
absent instead of deferring probe indefinitely.
- Link to v2: https://patch.msgid.link/[email protected]

Changes in v2:
- hm1092: use pm_ptr() instead of pm_sleep_ptr() for the dev_pm_ops pointer. The ops come from DEFINE_RUNTIME_DEV_PM_OPS(), so gating them
on CONFIG_PM_SLEEP dropped runtime PM on a CONFIG_PM=y, PM_SLEEP=n
build.
- hm1092: free the control handler on the error paths in hm1092_init_controls(); the fwnode-parse and ctrl_hdlr->error returns leaked the handler.
- Link to v1: https://patch.msgid.link/[email protected]

To: Ramshouriesh R <[email protected]>
To: Mauro Carvalho Chehab <[email protected]>
To: Rob Herring <[email protected]>
To: Krzysztof Kozlowski <[email protected]>
To: Conor Dooley <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

---
Ramshouriesh R (2):
media: dt-bindings: Add Himax HM1092 NIR sensor
media: i2c: hm1092: add Himax HM1092 mono NIR sensor driver

 .../bindings/media/i2c/himax,hm1092.yaml           | 109 +++
 MAINTAINERS                                        |   7 +
 drivers/media/i2c/Kconfig                          |  11 +
 drivers/media/i2c/Makefile                         |   1 +
 drivers/media/i2c/hm1092.c                         | 728 +++++++++++++++++++++
 5 files changed, 856 insertions(+)

---
base-commit: be5c93fa674f0fc3c8f359c2143abce6bbb422e6
change-id: 20260618-hm1092-driver-a6f2aaddf201

Best regards,

Ramshouriesh R <[email protected]>

Add a dt-binding schema for the Himax HM1092, a 1 megapixel monochrome near-infrared CMOS image sensor used as the face-authentication IR camera on laptops. The sensor streams 10-bit RAW over a single MIPI CSI-2 data lane.

---
 .../bindings/media/i2c/himax,hm1092.yaml           | 109 +++++++++++++++++++++
 1 file changed, 109 insertions(+)

new file mode 100644
index 000000000000..49f8d6e2ef93
@@ -0,0 +1,109 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/himax,hm1092.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Himax HM1092 Monochrome NIR Sensor
+
+maintainers:
+  - Ramshouriesh R <[email protected]>
+
+description:
+  The Himax HM1092 is a 1 megapixel monochrome near-infrared CMOS image
+  sensor with a MIPI CSI-2 interface, commonly used as the IR camera for
+  face authentication on laptops. It outputs 10-bit RAW over a single
+  MIPI CSI-2 data lane.
+
+allOf:
+  - $ref: /schemas/media/video-interface-devices.yaml#
+
+properties:
+  compatible:
+    const: himax,hm1092
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  avdd-supply:
+    description: Analogue circuit voltage supply.
+
+  dovdd-supply:
+    description: I/O circuit voltage supply.
+
+  dvdd-supply:
+    description: Digital circuit voltage supply.
+
+  reset-gpios:
+    maxItems: 1
+    description: Active low GPIO connected to the XSHUTDOWN pad.
+
+  port:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    additionalProperties: false
+
+    properties:
+      endpoint:
+        $ref: /schemas/media/video-interfaces.yaml#
+        unevaluatedProperties: false
+
+        properties:
+          data-lanes:
+            items:
+              - const: 1
+            description:
+              The sensor uses a single MIPI CSI-2 data lane; this defaults
+              to 1 if omitted.
+
+        required:
+          - link-frequencies
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - avdd-supply
+  - dovdd-supply
+  - dvdd-supply
+  - port
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        camera@24 {
+            compatible = "himax,hm1092";
+            reg = <0x24>;
+
+            reset-gpios = <&tlmm 109 GPIO_ACTIVE_LOW>;
+            pinctrl-names = "default";
+            pinctrl-0 = <&cam_ir_default>;
+
+            clocks = <&camcc 1>;
+            assigned-clocks = <&camcc 1>;
+            assigned-clock-rates = <24000000>;
+
+            orientation = <0>;
+
+            avdd-supply = <&vreg_l7m_2p9>;
+            dvdd-supply = <&vreg_l7m_2p9>;
+            dovdd-supply = <&vreg_l4m_1p8>;
+
+            port {
+                hm1092_ep: endpoint {
+                    link-frequencies = /bits/ 64 <400000000>;
+                    remote-endpoint = <&camss_csiphy0_inep>;
+                };
+            };
+        };
+    };
+...

2.53.0

Add a V4L2 subdev driver for the Himax HM1092, a 1 megapixel monochrome near-infrared image sensor with a single-lane MIPI CSI-2 interface, typically used as the face-authentication IR camera on laptops.

The driver supports the sensor's native 560x360 10-bit mono mode, a test pattern control and the standard fwnode properties (orientation, rotation).

---
 MAINTAINERS                |   7 +
 drivers/media/i2c/Kconfig  |  11 +
 drivers/media/i2c/Makefile |   1 +
 drivers/media/i2c/hm1092.c | 728 +++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 747 insertions(+)

index 5e11dd741d9f..4d9a4991ca2b 100644
@@ -11652,6 +11652,13 @@ L:	[email protected]
 S:	Maintained
 F:	drivers/misc/hisi_hikey_usb.c
 
+HIMAX HM1092 SENSOR DRIVER
+M:	Ramshouriesh R <[email protected]>
+L:	[email protected]
+S:	Maintained
+F:	Documentation/devicetree/bindings/media/i2c/himax,hm1092.yaml
+F:	drivers/media/i2c/hm1092.c
+
 HIMAX HX83112B TOUCHSCREEN SUPPORT
 M:	Job Noorman <[email protected]>
 L:	[email protected]

index 5d173e0ecf42..f94621edbe1a 100644
@@ -137,6 +137,17 @@ config VIDEO_HI847
           To compile this driver as a module, choose M here: the
           module will be called hi847.
 
+config VIDEO_HM1092
+	tristate "Himax HM1092 sensor support"
+	select V4L2_CCI_I2C
+	help
+	  This is a Video4Linux2 sensor driver for the Himax HM1092
+	  monochrome near-infrared CMOS image sensor, used as the
+	  face-authentication IR camera on laptops.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called hm1092.
+
 config VIDEO_IMX111
 	tristate "Sony IMX111 sensor support"
 	select V4L2_CCI_I2C

index e45359efe0e4..6507c173d0fa 100644
@@ -45,6 +45,7 @@ obj-$(CONFIG_VIDEO_GC2145) += gc2145.o
 obj-$(CONFIG_VIDEO_HI556) += hi556.o
 obj-$(CONFIG_VIDEO_HI846) += hi846.o
 obj-$(CONFIG_VIDEO_HI847) += hi847.o
+obj-$(CONFIG_VIDEO_HM1092) += hm1092.o
 obj-$(CONFIG_VIDEO_I2C) += video-i2c.o
 obj-$(CONFIG_VIDEO_IMX111) += imx111.o
 obj-$(CONFIG_VIDEO_IMX208) += imx208.o

2.53.0