[PATCH v3 0/2] media: i2c: Add support for GC08A3 sensor

[PATCH v3 0/2] media: i2c: Add support for GC08A3 sensor

[Zhi Mao]

This series adds YAML DT binding and V4L2 sub-device driver for Galaxycore's
GC08A3 8-megapixel 10-bit RAW CMOS 1/4" sensor, with an MIPI CSI-2 image data
interface and the I2C control bus.

The driver is implemented with V4L2 framework.
 - Async registered as a V4L2 sub-device.
 - As the first component of camera system including Seninf, ISP pipeline.
 - A media entity that provides one source pad in common.
 - Used in camera features on ChromeOS application.

Also this driver supports following features:
 - manual exposure and analog gain control support
 - vertical blanking control support
 - test pattern support
 - media controller support
 - runtime PM support
 - support resolution: 3264x2448@30fps, 1920x1080@60fps

Previous versions of this patch-set can be found here:
v2: https://lore.kernel.org/linux-media/20231207052016.25954-1-zhi.mao@mediatek.com/
v1: https://lore.kernel.org/linux-media/20231123115104.32094-1-zhi.mao@mediatek.com/

This series is based on linux-next, tag: next-20240108
Changes in v3:
- dts-binding files：
-- rename enable-gpio to reset-gpio.
-- remove "status","clock-names" & "clock-frequency" useless infomatin in dts-binding files.
-- remove the modifcation in "vendor-prefixes.yaml" as key words “galaxycore” has been added.

- gc08a sensor driver：
-- rename enable-gpio to reset-gpio in sensor driver
-- remove reset-gpio pull low in start of function：power_on()
-- fix some indentation code style issue in sensor driver probe function
-- remove some dev_info() print log function and some none C style comments in sensor driver
-- remove system suspend/resume operations and implement runtime PM support
-- remove .g_volatile_ctrl() and .try_ctrl() implementations
-- revome g_register/s_register functions
-- remove "mutex" cntrol and use subdev active state
-- remove "fmt&crop" variable in sensor driver and let subdev active state to store them
-- use v4l2-cci api to read/write sensor register
-- remove some dependencies & selection infomation in Kconfig, as they are handled in the VIDEO_CAMERA_SENSOR menu
-- remove .try_ctrl callback function
-- remobe "streaming == enable" in start_stream function
-- use an exact match method in enum_frame_interval() function
-- add "V4L2_SUBDEV_FL_HAS_EVENTS" for sd.flags in probe() function

Thanks

Zhi Mao (2):
  media: dt-bindings: media: i2c: Document GC08A3 bindings
  media: i2c: Add GC08A3 image sensor driver

 .../bindings/media/i2c/galaxycore,gc08a3.yaml |  112 ++
 drivers/media/i2c/Kconfig                     |   10 +
 drivers/media/i2c/Makefile                    |    1 +
 drivers/media/i2c/gc08a3.c                    | 1467 +++++++++++++++++
 4 files changed, 1590 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/galaxycore,gc08a3.yaml
 create mode 100644 drivers/media/i2c/gc08a3.c

-- 
2.25.1 

[PATCH v3 1/2] media: dt-bindings: media: i2c: Document GC08A3 bindings

[Zhi Mao]

Add YAML device tree binding for GC08A3 CMOS image sensor,
and the relevant MAINTAINERS entries.

Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>
---
 .../bindings/media/i2c/galaxycore,gc08a3.yaml | 112 ++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/galaxycore,gc08a3.yaml

diff --git a/Documentation/devicetree/bindings/media/i2c/galaxycore,gc08a3.yaml b/Documentation/devicetree/bindings/media/i2c/galaxycore,gc08a3.yaml
new file mode 100644
index 000000000000..1246d3b4a767
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/galaxycore,gc08a3.yaml
@@ -0,0 +1,112 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright (c) 2023 MediaTek Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/galaxycore,gc08a3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: GalaxyCore gc08a3 1/4" 8M Pixel MIPI CSI-2 sensor
+
+maintainers:
+  - Zhi Mao <zhi.mao@mediatek.com>
+
+description:
+  The gc08a3 is a raw image sensor with an MIPI CSI-2 image data
+  interface and CCI (I2C compatible) control bus. The output format
+  is raw Bayer.
+
+properties:
+  compatible:
+    const: galaxycore,gc08a3
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  dovdd-supply: true
+
+  avdd-supply: true
+
+  dvdd-supply: true
+
+  reset-gpios:
+    description: Reference to the GPIO connected to the RESETB pin.
+    maxItems: 1
+
+  port:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    additionalProperties: false
+    description:
+      Output port node, single endpoint describing the CSI-2 transmitter.
+
+    properties:
+      endpoint:
+        $ref: /schemas/media/video-interfaces.yaml#
+        unevaluatedProperties: false
+
+        properties:
+          data-lanes:
+            oneOf:
+              - items:
+                  - const: 1
+                  - const: 2
+                  - const: 3
+                  - const: 4
+              - items:
+                  - const: 1
+                  - const: 2
+
+          link-frequencies: true
+
+        required:
+          - data-lanes
+          - link-frequencies
+
+    required:
+      - endpoint
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - dovdd-supply
+  - avdd-supply
+  - dvdd-supply
+  - reset-gpios
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        sensor0@31 {
+            compatible = "galaxycore,gc08a3";
+            reg = <0x31>;
+
+            clocks = <&gc08a3_clk>;
+
+            reset-gpios = <&pio 19 GPIO_ACTIVE_HIGH>;
+
+            avdd-supply = <&gc08a3_avdd>;
+            dovdd-supply = <&gc08a3_dovdd>;
+            dvdd-supply = <&gc08a3_dvdd>;
+
+            port {
+                sensor0_out_2: endpoint {
+                    data-lanes = <1 2 3 4>;
+                    link-frequencies = /bits/ 64 <336000000 207000000>;
+                    remote-endpoint = <&seninf_csi_port_0_in_2>;
+                };
+            };
+        };
+    };
+
+...
-- 
2.25.1

Re: [PATCH v3 1/2] media: dt-bindings: media: i2c: Document GC08A3 bindings

[Krzysztof Kozlowski]

On 09/01/2024 03:27, Zhi Mao wrote:
> Add YAML device tree binding for GC08A3 CMOS image sensor,
> and the relevant MAINTAINERS entries.
> 

A nit, subject: drop second/last, redundant "bindings". The
"dt-bindings" prefix is already stating that these are bindings.
See also:
https://elixir.bootlin.com/linux/v6.7-rc8/source/Documentation/devicetree/bindings/submitting-patches.rst#L18

Subject: only one "media", so:
media: dt-bindings: i2c: add GalaxyCore GC08A3 image sensor

> Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>

...

> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        sensor0@31 {

sensor@31

With above fixed:
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Before you reply, fix your email client. It's impossible to read your
responses.

Best regards,
Krzysztof

Re: [PATCH v3 1/2] media: dt-bindings: media: i2c: Document GC08A3 bindings

[Zhi Mao (毛智)]

Hi Krzysztof,

Thanks for your review.


On Tue, 2024-01-09 at 10:24 +0100, Krzysztof Kozlowski wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  On 09/01/2024 03:27, Zhi Mao wrote:
> > Add YAML device tree binding for GC08A3 CMOS image sensor,
> > and the relevant MAINTAINERS entries.
> > 
> 
> A nit, subject: drop second/last, redundant "bindings". The
> "dt-bindings" prefix is already stating that these are bindings.
> See also:
> 
https://elixir.bootlin.com/linux/v6.7-rc8/source/Documentation/devicetree/bindings/submitting-patches.rst#L18
> 
> Subject: only one "media", so:
> media: dt-bindings: i2c: add GalaxyCore GC08A3 image sensor
> 
fixed in patch:v4.

> > Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>
> 
> ...
> 
> > +examples:
> > +  - |
> > +    #include <dt-bindings/gpio/gpio.h>
> > +
> > +    i2c {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        sensor0@31 {
> 
> sensor@31
> 
> With above fixed:
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> 
fixed in patch:v4. 

> Before you reply, fix your email client. It's impossible to read your
> responses.
> 
> Best regards,
> Krzysztof
> 

[PATCH v3 2/2] media: i2c: Add GC08A3 image sensor driver

[Zhi Mao]

Add a V4L2 sub-device driver for Galaxycore GC08A3 image sensor.

Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>
---
 drivers/media/i2c/Kconfig  |   10 +
 drivers/media/i2c/Makefile |    1 +
 drivers/media/i2c/gc08a3.c | 1467 ++++++++++++++++++++++++++++++++++++
 3 files changed, 1478 insertions(+)
 create mode 100644 drivers/media/i2c/gc08a3.c

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 78a87331686e..2e5bd751534b 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -70,6 +70,16 @@ config VIDEO_GC0308
 	  To compile this driver as a module, choose M here: the
 	  module will be called gc0308.
 
+config VIDEO_GC08A3
+	tristate "GalaxyCore gc08a3 sensor support"
+	select V4L2_CCI_I2C
+	help
+	  This is a Video4Linux2 sensor driver for the GalaxyCore gc08a3
+	  camera.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called gc08a3.
+
 config VIDEO_GC2145
 	select V4L2_CCI_I2C
 	tristate "GalaxyCore GC2145 sensor support"
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index dfbe6448b549..b82e99ca7578 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_VIDEO_DW9768) += dw9768.o
 obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o
 obj-$(CONFIG_VIDEO_ET8EK8) += et8ek8/
 obj-$(CONFIG_VIDEO_GC0308) += gc0308.o
+obj-$(CONFIG_VIDEO_GC08A3) += gc08a3.o
 obj-$(CONFIG_VIDEO_GC2145) += gc2145.o
 obj-$(CONFIG_VIDEO_HI556) += hi556.o
 obj-$(CONFIG_VIDEO_HI846) += hi846.o
diff --git a/drivers/media/i2c/gc08a3.c b/drivers/media/i2c/gc08a3.c
new file mode 100644
index 000000000000..eea304f0f84d
--- /dev/null
+++ b/drivers/media/i2c/gc08a3.c
@@ -0,0 +1,1467 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * gc08a3.c - gc08a3 sensor driver
+ *
+ * Copyright 2023 MediaTek
+ *
+ * Zhi Mao <zhi.mao@mediatek.com>
+ */
+
+#include <asm/unaligned.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <media/media-entity.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+#include <media/v4l2-cci.h>
+#include <media/v4l2-event.h>
+
+#define GC08A3_REG_CHIP_ID CCI_REG16(0x03f0)
+#define GC08A3_CHIP_ID 0x08a3
+
+#define GC08A3_NATIVE_WIDTH 3264
+#define GC08A3_NATIVE_HEIGHT 2448
+
+#define GC08A3_REG_TEST_PATTERN_EN CCI_REG8(0x008c)
+#define GC08A3_REG_TEST_PATTERN_IDX CCI_REG8(0x008d)
+#define GC08A3_TEST_PATTERN_EN 0x01
+
+#define GC08A3_STRAEMING_REG CCI_REG8(0x0100)
+
+#define GC08A3_DEFAULT_CLK_FREQ 24000000
+#define GC08A3_MBUS_CODE MEDIA_BUS_FMT_SRGGB10_1X10
+#define GC08A3_DATA_LANES 4
+
+/* for 1920*1080 */
+#define GC08A3_LINK_FREQ_207MHZ 207000000ULL
+/* for 3264*2448 */
+#define GC08A3_LINK_FREQ_336MHZ 336000000ULL
+
+#define GC08A3_RGB_DEPTH 10
+
+#define GC08A3_FRAME_LENGTH_REG CCI_REG16(0x0340)
+#define GC08A3_VTS_30FPS 2548
+#define GC08A3_VTS_30FPS_MIN 2548
+#define GC08A3_VTS_60FPS 1276
+#define GC08A3_VTS_60FPS_MIN 1276
+#define GC08A3_VTS_MAX 0xfff0
+
+#define GC08A3_HTS_30FPS 3640
+#define GC08A3_HTS_60FPS 3640
+
+#define GC08A3_EXP_REG CCI_REG16(0x0202)
+#define GC08A3_EXP_MARGIN 16
+#define GC08A3_EXP_MIN 4
+#define GC08A3_EXP_STEP 1
+
+#define GC08A3_FLIP_REG CCI_REG8(0x0101)
+#define GC08A3_FLIP_H_MASK 0x1
+#define GC08A3_FLIP_V_MASK 0x2
+
+#define GC08A3_AGAIN_REG CCI_REG16(0x0204)
+#define GC08A3_AGAIN_MIN 1024
+#define GC08A3_AGAIN_MAX (1024 * 16)
+#define GC08A3_AGAIN_STEP 1
+
+#define GC08A3_MIN_SLEEP_US  2000
+#define GC08A3_MAX_SLEEP_US  3000
+
+static const char *const gc08a3_test_pattern_menu[] = {
+	"No Pattern", "Solid Black", "Colour Bar", "Solid White",
+	"Solid Red", "Solid Green", "Solid Blue", "Solid Yellow",
+};
+
+enum {
+	GC08A3_LINK_FREQ_336MHZ_INDEX,
+	GC08A3_LINK_FREQ_207MHZ_INDEX,
+};
+
+static const s64 link_freq_menu_items[] = {
+	GC08A3_LINK_FREQ_336MHZ,
+	GC08A3_LINK_FREQ_207MHZ,
+};
+
+static const char *const gc08a3_supply_name[] = {
+	"avdd",
+	"dvdd",
+	"dovdd",
+};
+
+#define GC08A3_NUM_SUPPLIES ARRAY_SIZE(gc08a3_supply_name)
+
+struct gc08a3 {
+	struct device *dev;
+	struct v4l2_subdev sd;
+	struct media_pad pad;
+	struct i2c_client *client;
+
+	struct clk *xclk;
+	struct regulator_bulk_data supplies[GC08A3_NUM_SUPPLIES];
+	struct gpio_desc *reset_gpio;
+
+	struct v4l2_ctrl_handler ctrls;
+	struct v4l2_ctrl *pixel_rate;
+	struct v4l2_ctrl *link_freq;
+	struct v4l2_ctrl *exposure;
+	struct v4l2_ctrl *vblank;
+	struct v4l2_ctrl *hblank;
+
+	struct regmap *regmap;
+
+	bool streaming;
+
+	/* Current mode */
+	const struct gc08a3_mode *cur_mode;
+};
+
+struct gc08a3_reg_list {
+	u32 num_of_regs;
+	const struct cci_reg_sequence *regs;
+};
+
+struct gc08a3_link_freq_config {
+	const struct gc08a3_reg_list reg_list;
+};
+
+static const struct cci_reg_sequence mode_3264x2448[] = {
+	/* system */
+	{ CCI_REG8(0x0336), 0x70 },
+	{ CCI_REG8(0x0383), 0xbb },
+	{ CCI_REG8(0x0344), 0x00 },
+	{ CCI_REG8(0x0345), 0x06 },
+	{ CCI_REG8(0x0346), 0x00 },
+	{ CCI_REG8(0x0347), 0x04 },
+	{ CCI_REG8(0x0348), 0x0c },
+	{ CCI_REG8(0x0349), 0xd0 },
+	{ CCI_REG8(0x034a), 0x09 },
+	{ CCI_REG8(0x034b), 0x9c },
+	{ CCI_REG8(0x0202), 0x09 },
+	{ CCI_REG8(0x0203), 0x04 },
+	{ CCI_REG8(0x0340), 0x09 },
+	{ CCI_REG8(0x0341), 0xf4 },
+	{ CCI_REG8(0x0342), 0x07 },
+	{ CCI_REG8(0x0343), 0x1c },
+
+	{ CCI_REG8(0x0226), 0x00 },
+	{ CCI_REG8(0x0227), 0x28 },
+	{ CCI_REG8(0x0e38), 0x49 },
+	{ CCI_REG8(0x0210), 0x13 },
+	{ CCI_REG8(0x0218), 0x00 },
+	{ CCI_REG8(0x0241), 0x88 },
+	{ CCI_REG8(0x0392), 0x60 },
+
+	/* ISP */
+	{ CCI_REG8(0x00a2), 0x00 },
+	{ CCI_REG8(0x00a3), 0x00 },
+	{ CCI_REG8(0x00ab), 0x00 },
+	{ CCI_REG8(0x00ac), 0x00 },
+
+	/* GAIN */
+	{ CCI_REG8(0x0204), 0x04 },
+	{ CCI_REG8(0x0205), 0x00 },
+	{ CCI_REG8(0x0050), 0x5c },
+	{ CCI_REG8(0x0051), 0x44 },
+
+	/* out window */
+	{ CCI_REG8(0x009a), 0x66 },
+	{ CCI_REG8(0x0351), 0x00 },
+	{ CCI_REG8(0x0352), 0x06 },
+	{ CCI_REG8(0x0353), 0x00 },
+	{ CCI_REG8(0x0354), 0x08 },
+	{ CCI_REG8(0x034c), 0x0c },
+	{ CCI_REG8(0x034d), 0xc0 },
+	{ CCI_REG8(0x034e), 0x09 },
+	{ CCI_REG8(0x034f), 0x90 },
+
+	/* MIPI */
+	{ CCI_REG8(0x0114), 0x03 },
+	{ CCI_REG8(0x0180), 0x65 },
+	{ CCI_REG8(0x0181), 0xf0 },
+	{ CCI_REG8(0x0185), 0x01 },
+	{ CCI_REG8(0x0115), 0x30 },
+	{ CCI_REG8(0x011b), 0x12 },
+	{ CCI_REG8(0x011c), 0x12 },
+	{ CCI_REG8(0x0121), 0x06 },
+	{ CCI_REG8(0x0122), 0x06 },
+	{ CCI_REG8(0x0123), 0x15 },
+	{ CCI_REG8(0x0124), 0x01 },
+	{ CCI_REG8(0x0125), 0x0b },
+	{ CCI_REG8(0x0126), 0x08 },
+	{ CCI_REG8(0x0129), 0x06 },
+	{ CCI_REG8(0x012a), 0x08 },
+	{ CCI_REG8(0x012b), 0x08 },
+
+	{ CCI_REG8(0x0a73), 0x60 },
+	{ CCI_REG8(0x0a70), 0x11 },
+	{ CCI_REG8(0x0313), 0x80 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0a70), 0x00 },
+	{ CCI_REG8(0x00a4), 0x80 },
+	{ CCI_REG8(0x0316), 0x01 },
+	{ CCI_REG8(0x0a67), 0x00 },
+	{ CCI_REG8(0x0084), 0x10 },
+	{ CCI_REG8(0x0102), 0x09 },
+};
+
+static const struct cci_reg_sequence mode_1920x1080[] = {
+	/* system */
+	{ CCI_REG8(0x0336), 0x45 },
+	{ CCI_REG8(0x0383), 0x8b },
+	{ CCI_REG8(0x0344), 0x02 },
+	{ CCI_REG8(0x0345), 0xa6 },
+	{ CCI_REG8(0x0346), 0x02 },
+	{ CCI_REG8(0x0347), 0xb0 },
+	{ CCI_REG8(0x0348), 0x07 },
+	{ CCI_REG8(0x0349), 0x90 },
+	{ CCI_REG8(0x034a), 0x04 },
+	{ CCI_REG8(0x034b), 0x44 },
+	{ CCI_REG8(0x0202), 0x03 },
+	{ CCI_REG8(0x0203), 0x00 },
+	{ CCI_REG8(0x0340), 0x04 },
+	{ CCI_REG8(0x0341), 0xfc },
+	{ CCI_REG8(0x0342), 0x07 },
+	{ CCI_REG8(0x0343), 0x1c },
+	{ CCI_REG8(0x0226), 0x00 },
+	{ CCI_REG8(0x0227), 0x88 },
+	{ CCI_REG8(0x0e38), 0x49 },
+	{ CCI_REG8(0x0210), 0x13 },
+	{ CCI_REG8(0x0218), 0x00 },
+	{ CCI_REG8(0x0241), 0x88 },
+	{ CCI_REG8(0x0392), 0x60 },
+
+	/* ISP */
+	{ CCI_REG8(0x00a2), 0xac },
+	{ CCI_REG8(0x00a3), 0x02 },
+	{ CCI_REG8(0x00ab), 0xa0 },
+	{ CCI_REG8(0x00ac), 0x02 },
+
+	/* GAIN */
+	{ CCI_REG8(0x0204), 0x04 },
+	{ CCI_REG8(0x0205), 0x00 },
+	{ CCI_REG8(0x0050), 0x38 },
+	{ CCI_REG8(0x0051), 0x20 },
+
+	/* out window */
+	{ CCI_REG8(0x009a), 0x66 },
+	{ CCI_REG8(0x0351), 0x00 },
+	{ CCI_REG8(0x0352), 0x06 },
+	{ CCI_REG8(0x0353), 0x00 },
+	{ CCI_REG8(0x0354), 0x08 },
+	{ CCI_REG8(0x034c), 0x07 },
+	{ CCI_REG8(0x034d), 0x80 },
+	{ CCI_REG8(0x034e), 0x04 },
+	{ CCI_REG8(0x034f), 0x38 },
+
+	/* MIPI */
+	{ CCI_REG8(0x0114), 0x03 },
+	{ CCI_REG8(0x0180), 0x65 },
+	{ CCI_REG8(0x0181), 0xf0 },
+	{ CCI_REG8(0x0185), 0x01 },
+	{ CCI_REG8(0x0115), 0x30 },
+	{ CCI_REG8(0x011b), 0x12 },
+	{ CCI_REG8(0x011c), 0x12 },
+	{ CCI_REG8(0x0121), 0x02 },
+	{ CCI_REG8(0x0122), 0x03 },
+	{ CCI_REG8(0x0123), 0x0c },
+	{ CCI_REG8(0x0124), 0x00 },
+	{ CCI_REG8(0x0125), 0x09 },
+	{ CCI_REG8(0x0126), 0x06 },
+	{ CCI_REG8(0x0129), 0x04 },
+	{ CCI_REG8(0x012a), 0x03 },
+	{ CCI_REG8(0x012b), 0x06 },
+
+	{ CCI_REG8(0x0a73), 0x60 },
+	{ CCI_REG8(0x0a70), 0x11 },
+	{ CCI_REG8(0x0313), 0x80 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0aff), 0x00 },
+	{ CCI_REG8(0x0a70), 0x00 },
+	{ CCI_REG8(0x00a4), 0x80 },
+	{ CCI_REG8(0x0316), 0x01 },
+	{ CCI_REG8(0x0a67), 0x00 },
+	{ CCI_REG8(0x0084), 0x10 },
+	{ CCI_REG8(0x0102), 0x09 },
+};
+
+static const struct cci_reg_sequence mode_table_common[] = {
+	{ GC08A3_STRAEMING_REG, 0x00 },
+	/* system */
+	{ CCI_REG8(0x031c), 0x60 },
+	{ CCI_REG8(0x0337), 0x04 },
+	{ CCI_REG8(0x0335), 0x51 },
+	{ CCI_REG8(0x0336), 0x70 },
+	{ CCI_REG8(0x0383), 0xbb },
+	{ CCI_REG8(0x031a), 0x00 },
+	{ CCI_REG8(0x0321), 0x10 },
+	{ CCI_REG8(0x0327), 0x03 },
+	{ CCI_REG8(0x0325), 0x40 },
+	{ CCI_REG8(0x0326), 0x23 },
+	{ CCI_REG8(0x0314), 0x11 },
+	{ CCI_REG8(0x0315), 0xd6 },
+	{ CCI_REG8(0x0316), 0x01 },
+	{ CCI_REG8(0x0334), 0x40 },
+	{ CCI_REG8(0x0324), 0x42 },
+	{ CCI_REG8(0x031c), 0x00 },
+	{ CCI_REG8(0x031c), 0x9f },
+	{ CCI_REG8(0x039a), 0x13 },
+	{ CCI_REG8(0x0084), 0x30 },
+	{ CCI_REG8(0x02b3), 0x08 },
+	{ CCI_REG8(0x0057), 0x0c },
+	{ CCI_REG8(0x05c3), 0x50 },
+	{ CCI_REG8(0x0311), 0x90 },
+	{ CCI_REG8(0x05a0), 0x02 },
+	{ CCI_REG8(0x0074), 0x0a },
+	{ CCI_REG8(0x0059), 0x11 },
+	{ CCI_REG8(0x0070), 0x05 },
+	{ CCI_REG8(0x0101), 0x00 },
+
+	/* analog */
+	{ CCI_REG8(0x0344), 0x00 },
+	{ CCI_REG8(0x0345), 0x06 },
+	{ CCI_REG8(0x0346), 0x00 },
+	{ CCI_REG8(0x0347), 0x04 },
+	{ CCI_REG8(0x0348), 0x0c },
+	{ CCI_REG8(0x0349), 0xd0 },
+	{ CCI_REG8(0x034a), 0x09 },
+	{ CCI_REG8(0x034b), 0x9c },
+	{ CCI_REG8(0x0202), 0x09 },
+	{ CCI_REG8(0x0203), 0x04 },
+
+	{ CCI_REG8(0x0219), 0x05 },
+	{ CCI_REG8(0x0226), 0x00 },
+	{ CCI_REG8(0x0227), 0x28 },
+	{ CCI_REG8(0x0e0a), 0x00 },
+	{ CCI_REG8(0x0e0b), 0x00 },
+	{ CCI_REG8(0x0e24), 0x04 },
+	{ CCI_REG8(0x0e25), 0x04 },
+	{ CCI_REG8(0x0e26), 0x00 },
+	{ CCI_REG8(0x0e27), 0x10 },
+	{ CCI_REG8(0x0e01), 0x74 },
+	{ CCI_REG8(0x0e03), 0x47 },
+	{ CCI_REG8(0x0e04), 0x33 },
+	{ CCI_REG8(0x0e05), 0x44 },
+	{ CCI_REG8(0x0e06), 0x44 },
+	{ CCI_REG8(0x0e0c), 0x1e },
+	{ CCI_REG8(0x0e17), 0x3a },
+	{ CCI_REG8(0x0e18), 0x3c },
+	{ CCI_REG8(0x0e19), 0x40 },
+	{ CCI_REG8(0x0e1a), 0x42 },
+	{ CCI_REG8(0x0e28), 0x21 },
+	{ CCI_REG8(0x0e2b), 0x68 },
+	{ CCI_REG8(0x0e2c), 0x0d },
+	{ CCI_REG8(0x0e2d), 0x08 },
+	{ CCI_REG8(0x0e34), 0xf4 },
+	{ CCI_REG8(0x0e35), 0x44 },
+	{ CCI_REG8(0x0e36), 0x07 },
+	{ CCI_REG8(0x0e38), 0x49 },
+	{ CCI_REG8(0x0210), 0x13 },
+	{ CCI_REG8(0x0218), 0x00 },
+	{ CCI_REG8(0x0241), 0x88 },
+	{ CCI_REG8(0x0e32), 0x00 },
+	{ CCI_REG8(0x0e33), 0x18 },
+	{ CCI_REG8(0x0e42), 0x03 },
+	{ CCI_REG8(0x0e43), 0x80 },
+	{ CCI_REG8(0x0e44), 0x04 },
+	{ CCI_REG8(0x0e45), 0x00 },
+	{ CCI_REG8(0x0e4f), 0x04 },
+	{ CCI_REG8(0x057a), 0x20 },
+	{ CCI_REG8(0x0381), 0x7c },
+	{ CCI_REG8(0x0382), 0x9b },
+	{ CCI_REG8(0x0384), 0xfb },
+	{ CCI_REG8(0x0389), 0x38 },
+	{ CCI_REG8(0x038a), 0x03 },
+	{ CCI_REG8(0x0390), 0x6a },
+	{ CCI_REG8(0x0391), 0x0b },
+	{ CCI_REG8(0x0392), 0x60 },
+	{ CCI_REG8(0x0393), 0xc1 },
+	{ CCI_REG8(0x0396), 0xff },
+	{ CCI_REG8(0x0398), 0x62 },
+
+	/* cisctl reset */
+	{ CCI_REG8(0x031c), 0x80 },
+	{ CCI_REG8(0x03fe), 0x10 },
+	{ CCI_REG8(0x03fe), 0x00 },
+	{ CCI_REG8(0x031c), 0x9f },
+	{ CCI_REG8(0x03fe), 0x00 },
+	{ CCI_REG8(0x03fe), 0x00 },
+	{ CCI_REG8(0x03fe), 0x00 },
+	{ CCI_REG8(0x03fe), 0x00 },
+	{ CCI_REG8(0x031c), 0x80 },
+	{ CCI_REG8(0x03fe), 0x10 },
+	{ CCI_REG8(0x03fe), 0x00 },
+	{ CCI_REG8(0x031c), 0x9f },
+	{ CCI_REG8(0x0360), 0x01 },
+	{ CCI_REG8(0x0360), 0x00 },
+	{ CCI_REG8(0x0316), 0x09 },
+	{ CCI_REG8(0x0a67), 0x80 },
+	{ CCI_REG8(0x0313), 0x00 },
+	{ CCI_REG8(0x0a53), 0x0e },
+	{ CCI_REG8(0x0a65), 0x17 },
+	{ CCI_REG8(0x0a68), 0xa1 },
+	{ CCI_REG8(0x0a58), 0x00 },
+	{ CCI_REG8(0x0ace), 0x0c },
+	{ CCI_REG8(0x00a4), 0x00 },
+	{ CCI_REG8(0x00a5), 0x01 },
+	{ CCI_REG8(0x00a7), 0x09 },
+	{ CCI_REG8(0x00a8), 0x9c },
+	{ CCI_REG8(0x00a9), 0x0c },
+	{ CCI_REG8(0x00aa), 0xd0 },
+	{ CCI_REG8(0x0a8a), 0x00 },
+	{ CCI_REG8(0x0a8b), 0xe0 },
+	{ CCI_REG8(0x0a8c), 0x13 },
+	{ CCI_REG8(0x0a8d), 0xe8 },
+	{ CCI_REG8(0x0a90), 0x0a },
+	{ CCI_REG8(0x0a91), 0x10 },
+	{ CCI_REG8(0x0a92), 0xf8 },
+	{ CCI_REG8(0x0a71), 0xf2 },
+	{ CCI_REG8(0x0a72), 0x12 },
+	{ CCI_REG8(0x0a73), 0x64 },
+	{ CCI_REG8(0x0a75), 0x41 },
+	{ CCI_REG8(0x0a70), 0x07 },
+	{ CCI_REG8(0x0313), 0x80 },
+
+	/* ISP */
+	{ CCI_REG8(0x00a0), 0x01 },
+	{ CCI_REG8(0x0080), 0xd2 },
+	{ CCI_REG8(0x0081), 0x3f },
+	{ CCI_REG8(0x0087), 0x51 },
+	{ CCI_REG8(0x0089), 0x03 },
+	{ CCI_REG8(0x009b), 0x40 },
+	{ CCI_REG8(0x05a0), 0x82 },
+	{ CCI_REG8(0x05ac), 0x00 },
+	{ CCI_REG8(0x05ad), 0x01 },
+	{ CCI_REG8(0x05ae), 0x00 },
+	{ CCI_REG8(0x0800), 0x0a },
+	{ CCI_REG8(0x0801), 0x14 },
+	{ CCI_REG8(0x0802), 0x28 },
+	{ CCI_REG8(0x0803), 0x34 },
+	{ CCI_REG8(0x0804), 0x0e },
+	{ CCI_REG8(0x0805), 0x33 },
+	{ CCI_REG8(0x0806), 0x03 },
+	{ CCI_REG8(0x0807), 0x8a },
+	{ CCI_REG8(0x0808), 0x50 },
+	{ CCI_REG8(0x0809), 0x00 },
+	{ CCI_REG8(0x080a), 0x34 },
+	{ CCI_REG8(0x080b), 0x03 },
+	{ CCI_REG8(0x080c), 0x26 },
+	{ CCI_REG8(0x080d), 0x03 },
+	{ CCI_REG8(0x080e), 0x18 },
+	{ CCI_REG8(0x080f), 0x03 },
+	{ CCI_REG8(0x0810), 0x10 },
+	{ CCI_REG8(0x0811), 0x03 },
+	{ CCI_REG8(0x0812), 0x00 },
+	{ CCI_REG8(0x0813), 0x00 },
+	{ CCI_REG8(0x0814), 0x01 },
+	{ CCI_REG8(0x0815), 0x00 },
+	{ CCI_REG8(0x0816), 0x01 },
+	{ CCI_REG8(0x0817), 0x00 },
+	{ CCI_REG8(0x0818), 0x00 },
+	{ CCI_REG8(0x0819), 0x0a },
+	{ CCI_REG8(0x081a), 0x01 },
+	{ CCI_REG8(0x081b), 0x6c },
+	{ CCI_REG8(0x081c), 0x00 },
+	{ CCI_REG8(0x081d), 0x0b },
+	{ CCI_REG8(0x081e), 0x02 },
+	{ CCI_REG8(0x081f), 0x00 },
+	{ CCI_REG8(0x0820), 0x00 },
+	{ CCI_REG8(0x0821), 0x0c },
+	{ CCI_REG8(0x0822), 0x02 },
+	{ CCI_REG8(0x0823), 0xd9 },
+	{ CCI_REG8(0x0824), 0x00 },
+	{ CCI_REG8(0x0825), 0x0d },
+	{ CCI_REG8(0x0826), 0x03 },
+	{ CCI_REG8(0x0827), 0xf0 },
+	{ CCI_REG8(0x0828), 0x00 },
+	{ CCI_REG8(0x0829), 0x0e },
+	{ CCI_REG8(0x082a), 0x05 },
+	{ CCI_REG8(0x082b), 0x94 },
+	{ CCI_REG8(0x082c), 0x09 },
+	{ CCI_REG8(0x082d), 0x6e },
+	{ CCI_REG8(0x082e), 0x07 },
+	{ CCI_REG8(0x082f), 0xe6 },
+	{ CCI_REG8(0x0830), 0x10 },
+	{ CCI_REG8(0x0831), 0x0e },
+	{ CCI_REG8(0x0832), 0x0b },
+	{ CCI_REG8(0x0833), 0x2c },
+	{ CCI_REG8(0x0834), 0x14 },
+	{ CCI_REG8(0x0835), 0xae },
+	{ CCI_REG8(0x0836), 0x0f },
+	{ CCI_REG8(0x0837), 0xc4 },
+	{ CCI_REG8(0x0838), 0x18 },
+	{ CCI_REG8(0x0839), 0x0e },
+	{ CCI_REG8(0x05ac), 0x01 },
+	{ CCI_REG8(0x059a), 0x00 },
+	{ CCI_REG8(0x059b), 0x00 },
+	{ CCI_REG8(0x059c), 0x01 },
+	{ CCI_REG8(0x0598), 0x00 },
+	{ CCI_REG8(0x0597), 0x14 },
+	{ CCI_REG8(0x05ab), 0x09 },
+	{ CCI_REG8(0x05a4), 0x02 },
+	{ CCI_REG8(0x05a3), 0x05 },
+	{ CCI_REG8(0x05a0), 0xc2 },
+	{ CCI_REG8(0x0207), 0xc4 },
+
+	/* GAIN */
+	{ CCI_REG8(0x0208), 0x01 },
+	{ CCI_REG8(0x0209), 0x72 },
+	{ CCI_REG8(0x0204), 0x04 },
+	{ CCI_REG8(0x0205), 0x00 },
+
+	{ CCI_REG8(0x0040), 0x22 },
+	{ CCI_REG8(0x0041), 0x20 },
+	{ CCI_REG8(0x0043), 0x10 },
+	{ CCI_REG8(0x0044), 0x00 },
+	{ CCI_REG8(0x0046), 0x08 },
+	{ CCI_REG8(0x0047), 0xf0 },
+	{ CCI_REG8(0x0048), 0x0f },
+	{ CCI_REG8(0x004b), 0x0f },
+	{ CCI_REG8(0x004c), 0x00 },
+	{ CCI_REG8(0x0050), 0x5c },
+	{ CCI_REG8(0x0051), 0x44 },
+	{ CCI_REG8(0x005b), 0x03 },
+	{ CCI_REG8(0x00c0), 0x00 },
+	{ CCI_REG8(0x00c1), 0x80 },
+	{ CCI_REG8(0x00c2), 0x31 },
+	{ CCI_REG8(0x00c3), 0x00 },
+	{ CCI_REG8(0x0460), 0x04 },
+	{ CCI_REG8(0x0462), 0x08 },
+	{ CCI_REG8(0x0464), 0x0e },
+	{ CCI_REG8(0x0466), 0x0a },
+	{ CCI_REG8(0x0468), 0x12 },
+	{ CCI_REG8(0x046a), 0x12 },
+	{ CCI_REG8(0x046c), 0x10 },
+	{ CCI_REG8(0x046e), 0x0c },
+	{ CCI_REG8(0x0461), 0x03 },
+	{ CCI_REG8(0x0463), 0x03 },
+	{ CCI_REG8(0x0465), 0x03 },
+	{ CCI_REG8(0x0467), 0x03 },
+	{ CCI_REG8(0x0469), 0x04 },
+	{ CCI_REG8(0x046b), 0x04 },
+	{ CCI_REG8(0x046d), 0x04 },
+	{ CCI_REG8(0x046f), 0x04 },
+	{ CCI_REG8(0x0470), 0x04 },
+	{ CCI_REG8(0x0472), 0x10 },
+	{ CCI_REG8(0x0474), 0x26 },
+	{ CCI_REG8(0x0476), 0x38 },
+	{ CCI_REG8(0x0478), 0x20 },
+	{ CCI_REG8(0x047a), 0x30 },
+	{ CCI_REG8(0x047c), 0x38 },
+	{ CCI_REG8(0x047e), 0x60 },
+	{ CCI_REG8(0x0471), 0x05 },
+	{ CCI_REG8(0x0473), 0x05 },
+	{ CCI_REG8(0x0475), 0x05 },
+	{ CCI_REG8(0x0477), 0x05 },
+	{ CCI_REG8(0x0479), 0x04 },
+	{ CCI_REG8(0x047b), 0x04 },
+	{ CCI_REG8(0x047d), 0x04 },
+	{ CCI_REG8(0x047f), 0x04 },
+};
+
+static const struct gc08a3_link_freq_config link_freq_configs[] = {
+	[GC08A3_LINK_FREQ_336MHZ_INDEX] = {
+		.reg_list = {
+			.num_of_regs = ARRAY_SIZE(mode_table_common),
+			.regs = mode_table_common,
+		}
+	},
+	[GC08A3_LINK_FREQ_207MHZ_INDEX] = {
+		.reg_list = {
+			.num_of_regs = ARRAY_SIZE(mode_table_common),
+			.regs = mode_table_common,
+		}
+	},
+};
+
+struct gc08a3_mode {
+	u32 width;
+	u32 height;
+	const struct gc08a3_reg_list reg_list;
+
+	u32 hts; /* Horizontal timining size */
+	u32 vts_def; /* Default vertical timining size */
+	u32 vts_min; /* Min vertical timining size */
+	u32 link_freq_index; /* Link frequency needed for this resolution */
+	u32 max_framerate;
+};
+
+/*
+ * Declare modes in order, from biggest
+ * to smallest height.
+ */
+static const struct gc08a3_mode gc08a3_modes[] = {
+	{
+		.width = GC08A3_NATIVE_WIDTH,
+		.height = GC08A3_NATIVE_HEIGHT,
+		.reg_list = {
+			.num_of_regs = ARRAY_SIZE(mode_3264x2448),
+			.regs = mode_3264x2448,
+		},
+		.link_freq_index = GC08A3_LINK_FREQ_336MHZ_INDEX,
+
+		.hts = GC08A3_HTS_30FPS,
+		.vts_def = GC08A3_VTS_30FPS,
+		.vts_min = GC08A3_VTS_30FPS_MIN,
+		.max_framerate = 300,
+	},
+	{
+		.width = 1920,
+		.height = 1080,
+		.reg_list = {
+			.num_of_regs = ARRAY_SIZE(mode_1920x1080),
+			.regs = mode_1920x1080,
+		},
+		.link_freq_index = GC08A3_LINK_FREQ_207MHZ_INDEX,
+
+		.hts = GC08A3_HTS_60FPS,
+		.vts_def = GC08A3_VTS_60FPS,
+		.vts_min = GC08A3_VTS_60FPS_MIN,
+		.max_framerate = 600,
+	},
+};
+
+static u64 to_pixel_rate(u32 f_index)
+{
+	u64 pixel_rate = link_freq_menu_items[f_index] * 2 * GC08A3_DATA_LANES;
+
+	do_div(pixel_rate, GC08A3_RGB_DEPTH);
+
+	return pixel_rate;
+}
+
+static int gc08a3_identify_module(struct gc08a3 *gc08a3)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&gc08a3->sd);
+	u64 val = 0;
+	int ret;
+
+	ret = cci_read(gc08a3->regmap, GC08A3_REG_CHIP_ID, &val, NULL);
+	if (ret) {
+		dev_err(&client->dev, "failed to read chip id: 0x%x", GC08A3_CHIP_ID);
+		return ret;
+	}
+
+	if (val != GC08A3_CHIP_ID) {
+		dev_err(&client->dev, "chip id mismatch: 0x%x!=0x%llx",
+			GC08A3_CHIP_ID, val);
+		return -ENXIO;
+	}
+
+	return 0;
+}
+
+static inline struct gc08a3 *to_gc08a3(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct gc08a3, sd);
+}
+
+static int gc08a3_power_on(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct gc08a3 *gc08a3 = to_gc08a3(sd);
+	int ret;
+
+	ret = regulator_bulk_enable(GC08A3_NUM_SUPPLIES, gc08a3->supplies);
+	if (ret < 0) {
+		dev_err(gc08a3->dev, "failed to enable regulators: %d\n", ret);
+		return ret;
+	}
+
+	ret = clk_prepare_enable(gc08a3->xclk);
+	if (ret < 0) {
+		regulator_bulk_disable(GC08A3_NUM_SUPPLIES, gc08a3->supplies);
+		dev_err(gc08a3->dev, "clk prepare enable failed\n");
+		return ret;
+	}
+
+	usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
+
+	gpiod_set_value_cansleep(gc08a3->reset_gpio, 1);
+	usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
+
+	return 0;
+}
+
+static int gc08a3_power_off(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct gc08a3 *gc08a3 = to_gc08a3(sd);
+
+	clk_disable_unprepare(gc08a3->xclk);
+
+	usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
+
+	gpiod_set_value_cansleep(gc08a3->reset_gpio, 0);
+	usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
+
+	regulator_bulk_disable(GC08A3_NUM_SUPPLIES, gc08a3->supplies);
+	usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
+
+	return 0;
+}
+
+static int gc08a3_enum_mbus_code(struct v4l2_subdev *sd,
+				 struct v4l2_subdev_state *sd_state,
+				 struct v4l2_subdev_mbus_code_enum *code)
+{
+	if (code->index > 0)
+		return -EINVAL;
+
+	code->code = GC08A3_MBUS_CODE;
+
+	return 0;
+}
+
+static int gc08a3_enum_frame_size(struct v4l2_subdev *subdev,
+				  struct v4l2_subdev_state *sd_state,
+				  struct v4l2_subdev_frame_size_enum *fse)
+{
+	if (fse->code != GC08A3_MBUS_CODE)
+		return -EINVAL;
+
+	if (fse->index >= ARRAY_SIZE(gc08a3_modes))
+		return -EINVAL;
+
+	fse->min_width = gc08a3_modes[fse->index].width;
+	fse->max_width = gc08a3_modes[fse->index].width;
+	fse->min_height = gc08a3_modes[fse->index].height;
+	fse->max_height = gc08a3_modes[fse->index].height;
+
+	return 0;
+}
+
+static int gc08a3_update_cur_mode_controls(struct gc08a3 *gc08a3, const struct gc08a3_mode *mode)
+{
+	s64 exposure_max, h_blank;
+	int ret = 0;
+
+	ret = __v4l2_ctrl_modify_range(gc08a3->vblank,
+				       mode->vts_min - mode->height,
+				       GC08A3_VTS_MAX - mode->height, 1,
+				       mode->vts_def - mode->height);
+	if (ret)
+		dev_err(gc08a3->dev, "VB ctrl range update failed\n");
+
+	h_blank = mode->hts - mode->width;
+	ret = __v4l2_ctrl_modify_range(gc08a3->hblank, h_blank, h_blank, 1,
+				       h_blank);
+	if (ret)
+		dev_err(gc08a3->dev, "HB ctrl range update failed\n");
+
+	exposure_max = mode->vts_def - GC08A3_EXP_MARGIN;
+	ret = __v4l2_ctrl_modify_range(gc08a3->exposure, GC08A3_EXP_MIN,
+				       exposure_max, GC08A3_EXP_STEP,
+				       exposure_max);
+	if (ret)
+		dev_err(gc08a3->dev, "exposure ctrl range update failed\n");
+
+	return ret;
+}
+
+static void gc08a3_update_pad_format(struct gc08a3 *gc08a3,
+				     const struct gc08a3_mode *mode,
+				     struct v4l2_mbus_framefmt *fmt)
+{
+	fmt->width = mode->width;
+	fmt->height = mode->height;
+	fmt->code = GC08A3_MBUS_CODE;
+	fmt->field = V4L2_FIELD_NONE;
+	fmt->colorspace = V4L2_COLORSPACE_SRGB;
+	fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
+	fmt->quantization =
+		V4L2_MAP_QUANTIZATION_DEFAULT(true, fmt->colorspace, fmt->ycbcr_enc);
+	fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
+}
+
+static int gc08a3_set_format(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_state *state,
+			     struct v4l2_subdev_format *fmt)
+{
+	struct gc08a3 *gc08a3 = to_gc08a3(sd);
+	struct v4l2_mbus_framefmt *mbus_fmt;
+	struct v4l2_rect *crop;
+	const struct gc08a3_mode *mode;
+
+	mode = v4l2_find_nearest_size(gc08a3_modes, ARRAY_SIZE(gc08a3_modes),
+				      width, height, fmt->format.width,
+				      fmt->format.height);
+
+	/*update crop info to subdev state*/
+	crop = v4l2_subdev_state_get_crop(state, 0);
+	crop->width = mode->width;
+	crop->height = mode->height;
+
+	/*update fmt info to subdev state*/
+	gc08a3_update_pad_format(gc08a3, mode, &fmt->format);
+	mbus_fmt = v4l2_subdev_state_get_format(state, 0);
+	*mbus_fmt = fmt->format;
+
+	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+		return 0;
+
+	gc08a3->cur_mode = mode;
+	gc08a3_update_cur_mode_controls(gc08a3, mode);
+
+	return 0;
+}
+
+static int gc08a3_get_selection(struct v4l2_subdev *sd,
+				struct v4l2_subdev_state *state,
+				struct v4l2_subdev_selection *sel)
+{
+	struct gc08a3 *gc08a3 = to_gc08a3(sd);
+
+	switch (sel->target) {
+	case V4L2_SEL_TGT_CROP:
+		sel->r = *v4l2_subdev_state_get_crop(state, 0);
+		break;
+	case V4L2_SEL_TGT_CROP_BOUNDS:
+		sel->r.top = 0;
+		sel->r.left = 0;
+		sel->r.width = GC08A3_NATIVE_WIDTH;
+		sel->r.height = GC08A3_NATIVE_HEIGHT;
+		break;
+	case V4L2_SEL_TGT_CROP_DEFAULT:
+		if (gc08a3->cur_mode->width == GC08A3_NATIVE_WIDTH) {
+			sel->r.top = 0;
+			sel->r.left = 0;
+			sel->r.width = GC08A3_NATIVE_WIDTH;
+			sel->r.height = GC08A3_NATIVE_HEIGHT;
+		} else {
+			sel->r.top = 0;
+			sel->r.left = 0;
+			sel->r.width = 1920;
+			sel->r.height = 1080;
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int gc08a3_init_state(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_state *state)
+{
+	struct v4l2_subdev_format fmt = {
+		.which = V4L2_SUBDEV_FORMAT_TRY,
+		.pad = 0,
+		.format = {
+			.code = GC08A3_MBUS_CODE,
+			.width = gc08a3_modes[0].width,
+			.height = gc08a3_modes[0].height,
+		},
+	};
+
+	gc08a3_set_format(sd, state, &fmt);
+
+	return 0;
+}
+
+static int gc08a3_set_ctrl_hflip(struct gc08a3 *gc08a3, u32 ctrl_val)
+{
+	int ret;
+	u64 val;
+
+	ret = cci_read(gc08a3->regmap, GC08A3_FLIP_REG, &val, NULL);
+	if (ret) {
+		dev_err(gc08a3->dev, "read hflip register failed: %d\n", ret);
+		return ret;
+	}
+
+	val = ctrl_val ? (val | GC08A3_FLIP_H_MASK) :
+			   (val & ~GC08A3_FLIP_H_MASK);
+	ret = cci_write(gc08a3->regmap, GC08A3_FLIP_REG, val, NULL);
+	if (ret < 0)
+		dev_err(gc08a3->dev, "Error %d\n", ret);
+
+	return ret;
+}
+
+static int gc08a3_set_ctrl_vflip(struct gc08a3 *gc08a3, u32 ctrl_val)
+{
+	int ret;
+	u64 val;
+
+	ret = cci_read(gc08a3->regmap, GC08A3_FLIP_REG, &val, NULL);
+	if (ret) {
+		dev_err(gc08a3->dev, "read vflip register failed: %d\n", ret);
+		return ret;
+	}
+
+	val = ctrl_val ? (val | GC08A3_FLIP_V_MASK) :
+			   (val & ~GC08A3_FLIP_V_MASK);
+	ret = cci_write(gc08a3->regmap, GC08A3_FLIP_REG, val, NULL);
+	if (ret < 0)
+		dev_err(gc08a3->dev, "Error %d\n", ret);
+
+	return ret;
+}
+
+static int gc08a3_test_pattern(struct gc08a3 *gc08a3, u32 pattern_menu)
+{
+	int ret = 0;
+	u32 pattern = 0;
+
+	if (pattern_menu) {
+		switch (pattern_menu) {
+		case 1:
+			pattern = 0x00;
+			break;
+		case 2:
+			pattern = 0x10;
+			break;
+		case 3:
+		case 4:
+		case 5:
+		case 6:
+		case 7:
+			pattern = pattern_menu + 1;
+			break;
+		}
+
+		ret = cci_write(gc08a3->regmap, GC08A3_REG_TEST_PATTERN_EN,
+				GC08A3_TEST_PATTERN_EN, NULL);
+		if (ret) {
+			dev_err(gc08a3->dev, "test pattern enable failed: %d\n", ret);
+			return ret;
+		}
+
+		ret = cci_write(gc08a3->regmap, GC08A3_REG_TEST_PATTERN_IDX,
+				pattern, NULL);
+		if (ret < 0)
+			dev_err(gc08a3->dev, "Error %d\n", ret);
+
+	} else {
+		ret = cci_write(gc08a3->regmap, GC08A3_REG_TEST_PATTERN_EN,
+				0x00, NULL);
+		if (ret < 0)
+			dev_err(gc08a3->dev, "test pattern disable failed: %d\n", ret);
+	}
+
+	return ret;
+}
+
+static int gc08a3_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct gc08a3 *gc08a3 =
+		container_of(ctrl->handler, struct gc08a3, ctrls);
+	int ret = 0;
+	s64 exposure_max;
+
+	if (ctrl->id == V4L2_CID_VBLANK) {
+		/* Update max exposure while meeting expected vblanking */
+		exposure_max = gc08a3->cur_mode->height + ctrl->val -
+			       GC08A3_EXP_MARGIN;
+		__v4l2_ctrl_modify_range(gc08a3->exposure,
+					 gc08a3->exposure->minimum,
+					 exposure_max, gc08a3->exposure->step,
+					 exposure_max);
+	}
+
+	/*
+	 * Applying V4L2 control value only happens
+	 * when power is on for streaming
+	 */
+	if (!pm_runtime_get_if_in_use(gc08a3->dev))
+		return 0;
+
+	switch (ctrl->id) {
+	case V4L2_CID_EXPOSURE:
+		ret = cci_write(gc08a3->regmap, GC08A3_EXP_REG, ctrl->val, NULL);
+		break;
+
+	case V4L2_CID_ANALOGUE_GAIN:
+		ret = cci_write(gc08a3->regmap, GC08A3_AGAIN_REG, ctrl->val, NULL);
+		break;
+
+	case V4L2_CID_VBLANK:
+		ret = cci_write(gc08a3->regmap, GC08A3_FRAME_LENGTH_REG,
+				gc08a3->cur_mode->height + ctrl->val, NULL);
+		break;
+
+	case V4L2_CID_HFLIP:
+		ret = gc08a3_set_ctrl_hflip(gc08a3, ctrl->val);
+		break;
+
+	case V4L2_CID_VFLIP:
+		ret = gc08a3_set_ctrl_vflip(gc08a3, ctrl->val);
+		break;
+
+	case V4L2_CID_TEST_PATTERN:
+		ret = gc08a3_test_pattern(gc08a3, ctrl->val);
+		break;
+
+	default:
+		break;
+	}
+
+	pm_runtime_put(gc08a3->dev);
+
+	return ret;
+}
+
+static const struct v4l2_ctrl_ops gc08a3_ctrl_ops = {
+	.s_ctrl = gc08a3_set_ctrl,
+};
+
+static int gc08a3_start_streaming(struct gc08a3 *gc08a3)
+{
+	const struct gc08a3_mode *mode;
+	const struct gc08a3_reg_list *reg_list;
+	int link_freq_index;
+	int ret;
+
+	ret = pm_runtime_resume_and_get(gc08a3->dev);
+	if (ret < 0)
+		return ret;
+
+	link_freq_index = gc08a3->cur_mode->link_freq_index;
+
+	reg_list = &link_freq_configs[link_freq_index].reg_list;
+	ret = cci_multi_reg_write(gc08a3->regmap,
+				  reg_list->regs, reg_list->num_of_regs, NULL);
+	if (ret) {
+		dev_err(gc08a3->dev, "could not sent common table %d\n", ret);
+		goto err_rpm_put;
+	}
+
+	mode = gc08a3->cur_mode;
+	reg_list = &mode->reg_list;
+	ret = cci_multi_reg_write(gc08a3->regmap,
+				  reg_list->regs, reg_list->num_of_regs, NULL);
+	if (ret < 0) {
+		dev_err(gc08a3->dev, "could not sent mode table %d\n", ret);
+		goto err_rpm_put;
+	}
+
+	ret = __v4l2_ctrl_handler_setup(&gc08a3->ctrls);
+	if (ret < 0) {
+		dev_err(gc08a3->dev, "could not sync v4l2 controls\n");
+		goto err_rpm_put;
+	}
+
+	ret = cci_write(gc08a3->regmap, GC08A3_STRAEMING_REG, 1, NULL);
+	if (ret < 0) {
+		dev_err(gc08a3->dev, "write STRAEMING_REG failed: %d\n", ret);
+		goto err_rpm_put;
+	}
+
+	return 0;
+
+err_rpm_put:
+	pm_runtime_put(gc08a3->dev);
+	return ret;
+}
+
+static int gc08a3_stop_streaming(struct gc08a3 *gc08a3)
+{
+	int ret;
+
+	ret = cci_write(gc08a3->regmap, GC08A3_STRAEMING_REG, 0, NULL);
+	if (ret < 0)
+		dev_err(gc08a3->dev, "could not sent stop streaming %d\n", ret);
+
+	pm_runtime_put(gc08a3->dev);
+	return ret;
+}
+
+static int gc08a3_s_stream(struct v4l2_subdev *subdev, int enable)
+{
+	struct gc08a3 *gc08a3 = to_gc08a3(subdev);
+	struct v4l2_subdev_state *state;
+	int ret;
+
+	state = v4l2_subdev_lock_and_get_active_state(subdev);
+
+	if (enable)
+		ret = gc08a3_start_streaming(gc08a3);
+	else
+		ret = gc08a3_stop_streaming(gc08a3);
+
+	gc08a3->streaming = enable;
+	v4l2_subdev_unlock_state(state);
+
+	return ret;
+}
+
+static int gc08a3_g_mbus_config(struct v4l2_subdev *sd, unsigned int pad,
+				struct v4l2_mbus_config *config)
+{
+	config->type = V4L2_MBUS_CSI2_DPHY;
+	config->bus.mipi_csi2.num_data_lanes = 4;
+	config->bus.mipi_csi2.flags = 0;
+	return 0;
+}
+
+static int gc08a3_enum_frame_interval(struct v4l2_subdev *subdev,
+				      struct v4l2_subdev_state *sd_state,
+				      struct v4l2_subdev_frame_interval_enum *fie)
+{
+	unsigned int index = fie->index;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(gc08a3_modes); i++) {
+		if (fie->width != gc08a3_modes[i].width ||
+		    fie->height != gc08a3_modes[i].height)
+			continue;
+
+		if (index-- == 0) {
+			fie->interval.numerator = 1;
+			fie->interval.denominator = gc08a3_modes[i].max_framerate / 10;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static const struct v4l2_subdev_video_ops gc08a3_video_ops = {
+	.s_stream = gc08a3_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops gc08a3_subdev_pad_ops = {
+	.enum_mbus_code = gc08a3_enum_mbus_code,
+	.enum_frame_size = gc08a3_enum_frame_size,
+	.enum_frame_interval = gc08a3_enum_frame_interval,
+	.get_fmt = v4l2_subdev_get_fmt,
+	.set_fmt = gc08a3_set_format,
+	.get_selection = gc08a3_get_selection,
+	.get_mbus_config = gc08a3_g_mbus_config,
+};
+
+static const struct v4l2_subdev_core_ops gc08a3_core_ops = {
+	.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_ops gc08a3_subdev_ops = {
+	.core = &gc08a3_core_ops,
+	.video = &gc08a3_video_ops,
+	.pad = &gc08a3_subdev_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops gc08a3_internal_ops = {
+	.init_state = gc08a3_init_state,
+};
+
+static int gc08a3_get_regulators(struct device *dev, struct gc08a3 *gc08a3)
+{
+	unsigned int i;
+
+	for (i = 0; i < GC08A3_NUM_SUPPLIES; i++)
+		gc08a3->supplies[i].supply = gc08a3_supply_name[i];
+
+	return devm_regulator_bulk_get(dev, GC08A3_NUM_SUPPLIES,
+				       gc08a3->supplies);
+}
+
+static int gc08a3_parse_fwnode(struct device *dev)
+{
+	struct fwnode_handle *endpoint;
+	struct v4l2_fwnode_endpoint bus_cfg = {
+		.bus_type = V4L2_MBUS_CSI2_DPHY,
+	};
+	unsigned int i, j;
+	int ret;
+
+	endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
+	if (!endpoint) {
+		dev_err(dev, "endpoint node not found\n");
+		return -EINVAL;
+	}
+
+	ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
+	if (ret) {
+		dev_err(dev, "parsing endpoint node failed\n");
+		goto done;
+	}
+
+	if (!bus_cfg.nr_of_link_frequencies) {
+		dev_err(dev, "no link frequencies defined");
+		ret = -EINVAL;
+		goto done;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
+		for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
+			if (link_freq_menu_items[i] ==
+			    bus_cfg.link_frequencies[j])
+				break;
+		}
+
+		if (j == bus_cfg.nr_of_link_frequencies) {
+			dev_err(dev,
+				"no link frequency %lld supported, please check DT",
+				link_freq_menu_items[i]);
+			ret = -EINVAL;
+			goto done;
+		}
+	}
+
+done:
+	v4l2_fwnode_endpoint_free(&bus_cfg);
+	fwnode_handle_put(endpoint);
+	return ret;
+}
+
+static int gc08a3_init_controls(struct gc08a3 *gc08a3)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&gc08a3->sd);
+	const struct gc08a3_mode *mode = &gc08a3_modes[0];
+	const struct v4l2_ctrl_ops *ops = &gc08a3_ctrl_ops;
+	struct v4l2_fwnode_device_properties props;
+	struct v4l2_ctrl_handler *ctrl_hdlr;
+	s64 exposure_max, h_blank;
+	int ret;
+
+	ctrl_hdlr = &gc08a3->ctrls;
+	ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
+	if (ret)
+		return ret;
+
+	gc08a3->link_freq =
+		v4l2_ctrl_new_int_menu(ctrl_hdlr,
+				       &gc08a3_ctrl_ops,
+				       V4L2_CID_LINK_FREQ,
+				       ARRAY_SIZE(link_freq_menu_items) - 1,
+				       0, link_freq_menu_items);
+	if (gc08a3->link_freq)
+		gc08a3->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	gc08a3->pixel_rate =
+		v4l2_ctrl_new_std(ctrl_hdlr,
+				  &gc08a3_ctrl_ops,
+				  V4L2_CID_PIXEL_RATE, 0,
+				  to_pixel_rate(GC08A3_LINK_FREQ_336MHZ_INDEX), 1,
+				  to_pixel_rate(GC08A3_LINK_FREQ_336MHZ_INDEX));
+
+	gc08a3->vblank =
+		v4l2_ctrl_new_std(ctrl_hdlr,
+				  &gc08a3_ctrl_ops, V4L2_CID_VBLANK,
+				  mode->vts_min - mode->height,
+				  GC08A3_VTS_MAX - mode->height, 1,
+				  mode->vts_def - mode->height);
+
+	h_blank = mode->hts - mode->width;
+	gc08a3->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops,
+					   V4L2_CID_HBLANK, h_blank, h_blank, 1,
+					   h_blank);
+	if (gc08a3->hblank)
+		gc08a3->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops,
+			  V4L2_CID_ANALOGUE_GAIN, GC08A3_AGAIN_MIN,
+			  GC08A3_AGAIN_MAX, GC08A3_AGAIN_STEP,
+			  GC08A3_AGAIN_MIN);
+
+	exposure_max = mode->vts_def - GC08A3_EXP_MARGIN;
+	gc08a3->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops,
+					     V4L2_CID_EXPOSURE, GC08A3_EXP_MIN,
+					     exposure_max, GC08A3_EXP_STEP,
+					     exposure_max);
+
+	v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &gc08a3_ctrl_ops,
+				     V4L2_CID_TEST_PATTERN,
+				     ARRAY_SIZE(gc08a3_test_pattern_menu) - 1,
+				     0, 0, gc08a3_test_pattern_menu);
+
+	v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops, V4L2_CID_HFLIP, 0,
+			  1, 1, 0);
+
+	v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops, V4L2_CID_VFLIP, 0,
+			  1, 1, 0);
+
+	/* register properties to fwnode (e.g. rotation, orientation) */
+	ret = v4l2_fwnode_device_parse(&client->dev, &props);
+	if (ret)
+		goto error_ctrls;
+
+	ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, ops, &props);
+	if (ret)
+		goto error_ctrls;
+
+	if (ctrl_hdlr->error) {
+		ret = ctrl_hdlr->error;
+		goto error_ctrls;
+	}
+
+	gc08a3->sd.ctrl_handler = ctrl_hdlr;
+
+	return 0;
+
+error_ctrls:
+	v4l2_ctrl_handler_free(ctrl_hdlr);
+
+	return ret;
+}
+
+static int gc08a3_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct gc08a3 *gc08a3;
+	int ret;
+
+	ret = gc08a3_parse_fwnode(dev);
+	if (ret)
+		return ret;
+
+	gc08a3 = devm_kzalloc(dev, sizeof(*gc08a3), GFP_KERNEL);
+	if (!gc08a3)
+		return -ENOMEM;
+
+	gc08a3->dev = dev;
+
+	gc08a3->regmap = devm_cci_regmap_init_i2c(client, 16);
+	if (IS_ERR(gc08a3->regmap))
+		return dev_err_probe(dev, PTR_ERR(gc08a3->regmap),
+				     "failed to init CCI\n");
+
+	gc08a3->xclk = devm_clk_get(dev, NULL);
+	if (IS_ERR(gc08a3->xclk))
+		return dev_err_probe(dev, PTR_ERR(gc08a3->xclk),
+				     "failed to get xclk\n");
+
+	ret = clk_set_rate(gc08a3->xclk, GC08A3_DEFAULT_CLK_FREQ);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "failed to set xclk frequency\n");
+
+	ret = gc08a3_get_regulators(dev, gc08a3);
+	if (ret < 0)
+		return dev_err_probe(dev, ret,
+				     "failed to get regulators\n");
+
+	gc08a3->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(gc08a3->reset_gpio))
+		return dev_err_probe(dev, PTR_ERR(gc08a3->reset_gpio),
+				     "failed to get gpio\n");
+
+	v4l2_i2c_subdev_init(&gc08a3->sd, client, &gc08a3_subdev_ops);
+	gc08a3->sd.internal_ops = &gc08a3_internal_ops;
+	gc08a3->cur_mode = &gc08a3_modes[0];
+
+	ret = gc08a3_power_on(gc08a3->dev);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "failed to sensor power on\n");
+
+	ret = gc08a3_identify_module(gc08a3);
+	if (ret) {
+		dev_err(&client->dev, "failed to find sensor: %d\n", ret);
+		goto err_power_off;
+	}
+
+	ret = gc08a3_init_controls(gc08a3);
+	if (ret) {
+		dev_err(&client->dev, "failed to init controls: %d", ret);
+		goto err_power_off;
+	}
+
+	gc08a3->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
+	gc08a3->pad.flags = MEDIA_PAD_FL_SOURCE;
+	gc08a3->sd.dev = &client->dev;
+	gc08a3->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+
+	ret = media_entity_pads_init(&gc08a3->sd.entity, 1, &gc08a3->pad);
+	if (ret < 0) {
+		dev_err(dev, "could not register media entity\n");
+		goto err_v4l2_ctrl_handler_free;
+	}
+
+	gc08a3->sd.state_lock = gc08a3->ctrls.lock;
+	ret = v4l2_subdev_init_finalize(&gc08a3->sd);
+	if (ret < 0) {
+		dev_err(dev, "v4l2 subdev init error: %d\n", ret);
+		goto err_media_entity_cleanup;
+	}
+
+	ret = v4l2_async_register_subdev_sensor(&gc08a3->sd);
+	if (ret < 0) {
+		dev_err(dev, "could not register v4l2 device\n");
+		goto err_subdev_cleanup;
+	}
+
+	pm_runtime_set_active(gc08a3->dev);
+	pm_runtime_enable(gc08a3->dev);
+	pm_runtime_idle(gc08a3->dev);
+
+	return 0;
+
+err_subdev_cleanup:
+	v4l2_subdev_cleanup(&gc08a3->sd);
+
+err_media_entity_cleanup:
+	media_entity_cleanup(&gc08a3->sd.entity);
+
+err_v4l2_ctrl_handler_free:
+	v4l2_ctrl_handler_free(gc08a3->sd.ctrl_handler);
+
+err_power_off:
+	gc08a3_power_off(gc08a3->dev);
+
+	return ret;
+}
+
+static void gc08a3_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct gc08a3 *gc08a3 = to_gc08a3(sd);
+
+	v4l2_async_unregister_subdev(&gc08a3->sd);
+	v4l2_subdev_cleanup(sd);
+	media_entity_cleanup(&gc08a3->sd.entity);
+	v4l2_ctrl_handler_free(&gc08a3->ctrls);
+
+	pm_runtime_disable(&client->dev);
+	if (!pm_runtime_status_suspended(&client->dev))
+		gc08a3_power_off(gc08a3->dev);
+	pm_runtime_set_suspended(&client->dev);
+}
+
+static const struct of_device_id gc08a3_of_match[] = {
+	{ .compatible = "galaxycore,gc08a3" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, gc08a3_of_match);
+
+static const struct dev_pm_ops gc08a3_pm_ops = {
+	SET_RUNTIME_PM_OPS(gc08a3_power_off, gc08a3_power_on, NULL)
+};
+
+static struct i2c_driver gc08a3_i2c_driver = {
+	.driver = {
+		.of_match_table = gc08a3_of_match,
+		.pm = &gc08a3_pm_ops,
+		.name  = "gc08a3",
+	},
+	.probe  = gc08a3_probe,
+	.remove = gc08a3_remove,
+};
+
+module_i2c_driver(gc08a3_i2c_driver);
+
+MODULE_DESCRIPTION("GalaxyCore gc08a3 Camera driver");
+MODULE_AUTHOR("Zhi Mao <zhi.mao@mediatek.com>");
+MODULE_LICENSE("GPL");
-- 
2.25.1

Re: [PATCH v3 2/2] media: i2c: Add GC08A3 image sensor driver

[Sakari Ailus]

Hi Zhi,

Thanks for the update.

On Tue, Jan 09, 2024 at 10:27:15AM +0800, Zhi Mao wrote:
> Add a V4L2 sub-device driver for Galaxycore GC08A3 image sensor.
> 
> Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>
> ---
>  drivers/media/i2c/Kconfig  |   10 +
>  drivers/media/i2c/Makefile |    1 +
>  drivers/media/i2c/gc08a3.c | 1467 ++++++++++++++++++++++++++++++++++++
>  3 files changed, 1478 insertions(+)
>  create mode 100644 drivers/media/i2c/gc08a3.c
> 
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index 78a87331686e..2e5bd751534b 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -70,6 +70,16 @@ config VIDEO_GC0308
>  	  To compile this driver as a module, choose M here: the
>  	  module will be called gc0308.
>  
> +config VIDEO_GC08A3
> +	tristate "GalaxyCore gc08a3 sensor support"
> +	select V4L2_CCI_I2C
> +	help
> +	  This is a Video4Linux2 sensor driver for the GalaxyCore gc08a3
> +	  camera.
> +
> +	  To compile this driver as a module, choose M here: the
> +	  module will be called gc08a3.
> +
>  config VIDEO_GC2145
>  	select V4L2_CCI_I2C
>  	tristate "GalaxyCore GC2145 sensor support"
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index dfbe6448b549..b82e99ca7578 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -38,6 +38,7 @@ obj-$(CONFIG_VIDEO_DW9768) += dw9768.o
>  obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o
>  obj-$(CONFIG_VIDEO_ET8EK8) += et8ek8/
>  obj-$(CONFIG_VIDEO_GC0308) += gc0308.o
> +obj-$(CONFIG_VIDEO_GC08A3) += gc08a3.o
>  obj-$(CONFIG_VIDEO_GC2145) += gc2145.o
>  obj-$(CONFIG_VIDEO_HI556) += hi556.o
>  obj-$(CONFIG_VIDEO_HI846) += hi846.o
> diff --git a/drivers/media/i2c/gc08a3.c b/drivers/media/i2c/gc08a3.c
> new file mode 100644
> index 000000000000..eea304f0f84d
> --- /dev/null
> +++ b/drivers/media/i2c/gc08a3.c
> @@ -0,0 +1,1467 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * gc08a3.c - gc08a3 sensor driver
> + *
> + * Copyright 2023 MediaTek
> + *
> + * Zhi Mao <zhi.mao@mediatek.com>
> + */
> +
> +#include <asm/unaligned.h>
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/i2c.h>
> +#include <linux/module.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regulator/consumer.h>
> +#include <media/media-entity.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-fwnode.h>
> +#include <media/v4l2-subdev.h>
> +#include <media/v4l2-cci.h>
> +#include <media/v4l2-event.h>
> +
> +#define GC08A3_REG_CHIP_ID CCI_REG16(0x03f0)
> +#define GC08A3_CHIP_ID 0x08a3
> +
> +#define GC08A3_NATIVE_WIDTH 3264
> +#define GC08A3_NATIVE_HEIGHT 2448
> +
> +#define GC08A3_REG_TEST_PATTERN_EN CCI_REG8(0x008c)
> +#define GC08A3_REG_TEST_PATTERN_IDX CCI_REG8(0x008d)
> +#define GC08A3_TEST_PATTERN_EN 0x01
> +
> +#define GC08A3_STRAEMING_REG CCI_REG8(0x0100)
> +
> +#define GC08A3_DEFAULT_CLK_FREQ 24000000
> +#define GC08A3_MBUS_CODE MEDIA_BUS_FMT_SRGGB10_1X10
> +#define GC08A3_DATA_LANES 4
> +
> +/* for 1920*1080 */
> +#define GC08A3_LINK_FREQ_207MHZ 207000000ULL
> +/* for 3264*2448 */
> +#define GC08A3_LINK_FREQ_336MHZ 336000000ULL
> +
> +#define GC08A3_RGB_DEPTH 10
> +
> +#define GC08A3_FRAME_LENGTH_REG CCI_REG16(0x0340)
> +#define GC08A3_VTS_30FPS 2548
> +#define GC08A3_VTS_30FPS_MIN 2548
> +#define GC08A3_VTS_60FPS 1276
> +#define GC08A3_VTS_60FPS_MIN 1276
> +#define GC08A3_VTS_MAX 0xfff0
> +
> +#define GC08A3_HTS_30FPS 3640
> +#define GC08A3_HTS_60FPS 3640
> +
> +#define GC08A3_EXP_REG CCI_REG16(0x0202)
> +#define GC08A3_EXP_MARGIN 16
> +#define GC08A3_EXP_MIN 4
> +#define GC08A3_EXP_STEP 1
> +
> +#define GC08A3_FLIP_REG CCI_REG8(0x0101)
> +#define GC08A3_FLIP_H_MASK 0x1
> +#define GC08A3_FLIP_V_MASK 0x2
> +
> +#define GC08A3_AGAIN_REG CCI_REG16(0x0204)
> +#define GC08A3_AGAIN_MIN 1024
> +#define GC08A3_AGAIN_MAX (1024 * 16)
> +#define GC08A3_AGAIN_STEP 1
> +
> +#define GC08A3_MIN_SLEEP_US  2000
> +#define GC08A3_MAX_SLEEP_US  3000
> +
> +static const char *const gc08a3_test_pattern_menu[] = {
> +	"No Pattern", "Solid Black", "Colour Bar", "Solid White",
> +	"Solid Red", "Solid Green", "Solid Blue", "Solid Yellow",
> +};
> +
> +enum {
> +	GC08A3_LINK_FREQ_336MHZ_INDEX,
> +	GC08A3_LINK_FREQ_207MHZ_INDEX,
> +};
> +
> +static const s64 link_freq_menu_items[] = {
> +	GC08A3_LINK_FREQ_336MHZ,
> +	GC08A3_LINK_FREQ_207MHZ,
> +};
> +
> +static const char *const gc08a3_supply_name[] = {
> +	"avdd",
> +	"dvdd",
> +	"dovdd",
> +};
> +
> +#define GC08A3_NUM_SUPPLIES ARRAY_SIZE(gc08a3_supply_name)

Please don't add such macros, use ARRAY_SIZE(...) directly.

> +
> +struct gc08a3 {
> +	struct device *dev;
> +	struct v4l2_subdev sd;
> +	struct media_pad pad;
> +	struct i2c_client *client;
> +
> +	struct clk *xclk;
> +	struct regulator_bulk_data supplies[GC08A3_NUM_SUPPLIES];
> +	struct gpio_desc *reset_gpio;
> +
> +	struct v4l2_ctrl_handler ctrls;
> +	struct v4l2_ctrl *pixel_rate;
> +	struct v4l2_ctrl *link_freq;
> +	struct v4l2_ctrl *exposure;
> +	struct v4l2_ctrl *vblank;
> +	struct v4l2_ctrl *hblank;
> +
> +	struct regmap *regmap;
> +
> +	bool streaming;
> +
> +	/* Current mode */
> +	const struct gc08a3_mode *cur_mode;
> +};
> +
> +struct gc08a3_reg_list {
> +	u32 num_of_regs;
> +	const struct cci_reg_sequence *regs;
> +};
> +
> +struct gc08a3_link_freq_config {
> +	const struct gc08a3_reg_list reg_list;
> +};
> +
> +static const struct cci_reg_sequence mode_3264x2448[] = {
> +	/* system */
> +	{ CCI_REG8(0x0336), 0x70 },
> +	{ CCI_REG8(0x0383), 0xbb },
> +	{ CCI_REG8(0x0344), 0x00 },
> +	{ CCI_REG8(0x0345), 0x06 },
> +	{ CCI_REG8(0x0346), 0x00 },
> +	{ CCI_REG8(0x0347), 0x04 },
> +	{ CCI_REG8(0x0348), 0x0c },
> +	{ CCI_REG8(0x0349), 0xd0 },
> +	{ CCI_REG8(0x034a), 0x09 },
> +	{ CCI_REG8(0x034b), 0x9c },
> +	{ CCI_REG8(0x0202), 0x09 },
> +	{ CCI_REG8(0x0203), 0x04 },
> +	{ CCI_REG8(0x0340), 0x09 },
> +	{ CCI_REG8(0x0341), 0xf4 },
> +	{ CCI_REG8(0x0342), 0x07 },
> +	{ CCI_REG8(0x0343), 0x1c },
> +
> +	{ CCI_REG8(0x0226), 0x00 },
> +	{ CCI_REG8(0x0227), 0x28 },
> +	{ CCI_REG8(0x0e38), 0x49 },
> +	{ CCI_REG8(0x0210), 0x13 },
> +	{ CCI_REG8(0x0218), 0x00 },
> +	{ CCI_REG8(0x0241), 0x88 },
> +	{ CCI_REG8(0x0392), 0x60 },
> +
> +	/* ISP */
> +	{ CCI_REG8(0x00a2), 0x00 },
> +	{ CCI_REG8(0x00a3), 0x00 },
> +	{ CCI_REG8(0x00ab), 0x00 },
> +	{ CCI_REG8(0x00ac), 0x00 },
> +
> +	/* GAIN */
> +	{ CCI_REG8(0x0204), 0x04 },
> +	{ CCI_REG8(0x0205), 0x00 },
> +	{ CCI_REG8(0x0050), 0x5c },
> +	{ CCI_REG8(0x0051), 0x44 },
> +
> +	/* out window */
> +	{ CCI_REG8(0x009a), 0x66 },
> +	{ CCI_REG8(0x0351), 0x00 },
> +	{ CCI_REG8(0x0352), 0x06 },
> +	{ CCI_REG8(0x0353), 0x00 },
> +	{ CCI_REG8(0x0354), 0x08 },
> +	{ CCI_REG8(0x034c), 0x0c },
> +	{ CCI_REG8(0x034d), 0xc0 },
> +	{ CCI_REG8(0x034e), 0x09 },
> +	{ CCI_REG8(0x034f), 0x90 },
> +
> +	/* MIPI */
> +	{ CCI_REG8(0x0114), 0x03 },
> +	{ CCI_REG8(0x0180), 0x65 },
> +	{ CCI_REG8(0x0181), 0xf0 },
> +	{ CCI_REG8(0x0185), 0x01 },
> +	{ CCI_REG8(0x0115), 0x30 },
> +	{ CCI_REG8(0x011b), 0x12 },
> +	{ CCI_REG8(0x011c), 0x12 },
> +	{ CCI_REG8(0x0121), 0x06 },
> +	{ CCI_REG8(0x0122), 0x06 },
> +	{ CCI_REG8(0x0123), 0x15 },
> +	{ CCI_REG8(0x0124), 0x01 },
> +	{ CCI_REG8(0x0125), 0x0b },
> +	{ CCI_REG8(0x0126), 0x08 },
> +	{ CCI_REG8(0x0129), 0x06 },
> +	{ CCI_REG8(0x012a), 0x08 },
> +	{ CCI_REG8(0x012b), 0x08 },
> +
> +	{ CCI_REG8(0x0a73), 0x60 },
> +	{ CCI_REG8(0x0a70), 0x11 },
> +	{ CCI_REG8(0x0313), 0x80 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0a70), 0x00 },
> +	{ CCI_REG8(0x00a4), 0x80 },
> +	{ CCI_REG8(0x0316), 0x01 },
> +	{ CCI_REG8(0x0a67), 0x00 },
> +	{ CCI_REG8(0x0084), 0x10 },
> +	{ CCI_REG8(0x0102), 0x09 },
> +};
> +
> +static const struct cci_reg_sequence mode_1920x1080[] = {
> +	/* system */
> +	{ CCI_REG8(0x0336), 0x45 },
> +	{ CCI_REG8(0x0383), 0x8b },
> +	{ CCI_REG8(0x0344), 0x02 },
> +	{ CCI_REG8(0x0345), 0xa6 },
> +	{ CCI_REG8(0x0346), 0x02 },
> +	{ CCI_REG8(0x0347), 0xb0 },
> +	{ CCI_REG8(0x0348), 0x07 },
> +	{ CCI_REG8(0x0349), 0x90 },
> +	{ CCI_REG8(0x034a), 0x04 },
> +	{ CCI_REG8(0x034b), 0x44 },
> +	{ CCI_REG8(0x0202), 0x03 },
> +	{ CCI_REG8(0x0203), 0x00 },
> +	{ CCI_REG8(0x0340), 0x04 },
> +	{ CCI_REG8(0x0341), 0xfc },
> +	{ CCI_REG8(0x0342), 0x07 },
> +	{ CCI_REG8(0x0343), 0x1c },
> +	{ CCI_REG8(0x0226), 0x00 },
> +	{ CCI_REG8(0x0227), 0x88 },
> +	{ CCI_REG8(0x0e38), 0x49 },
> +	{ CCI_REG8(0x0210), 0x13 },
> +	{ CCI_REG8(0x0218), 0x00 },
> +	{ CCI_REG8(0x0241), 0x88 },
> +	{ CCI_REG8(0x0392), 0x60 },
> +
> +	/* ISP */
> +	{ CCI_REG8(0x00a2), 0xac },
> +	{ CCI_REG8(0x00a3), 0x02 },
> +	{ CCI_REG8(0x00ab), 0xa0 },
> +	{ CCI_REG8(0x00ac), 0x02 },
> +
> +	/* GAIN */
> +	{ CCI_REG8(0x0204), 0x04 },
> +	{ CCI_REG8(0x0205), 0x00 },
> +	{ CCI_REG8(0x0050), 0x38 },
> +	{ CCI_REG8(0x0051), 0x20 },
> +
> +	/* out window */
> +	{ CCI_REG8(0x009a), 0x66 },
> +	{ CCI_REG8(0x0351), 0x00 },
> +	{ CCI_REG8(0x0352), 0x06 },
> +	{ CCI_REG8(0x0353), 0x00 },
> +	{ CCI_REG8(0x0354), 0x08 },
> +	{ CCI_REG8(0x034c), 0x07 },
> +	{ CCI_REG8(0x034d), 0x80 },
> +	{ CCI_REG8(0x034e), 0x04 },
> +	{ CCI_REG8(0x034f), 0x38 },
> +
> +	/* MIPI */
> +	{ CCI_REG8(0x0114), 0x03 },
> +	{ CCI_REG8(0x0180), 0x65 },
> +	{ CCI_REG8(0x0181), 0xf0 },
> +	{ CCI_REG8(0x0185), 0x01 },
> +	{ CCI_REG8(0x0115), 0x30 },
> +	{ CCI_REG8(0x011b), 0x12 },
> +	{ CCI_REG8(0x011c), 0x12 },
> +	{ CCI_REG8(0x0121), 0x02 },
> +	{ CCI_REG8(0x0122), 0x03 },
> +	{ CCI_REG8(0x0123), 0x0c },
> +	{ CCI_REG8(0x0124), 0x00 },
> +	{ CCI_REG8(0x0125), 0x09 },
> +	{ CCI_REG8(0x0126), 0x06 },
> +	{ CCI_REG8(0x0129), 0x04 },
> +	{ CCI_REG8(0x012a), 0x03 },
> +	{ CCI_REG8(0x012b), 0x06 },
> +
> +	{ CCI_REG8(0x0a73), 0x60 },
> +	{ CCI_REG8(0x0a70), 0x11 },
> +	{ CCI_REG8(0x0313), 0x80 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0aff), 0x00 },
> +	{ CCI_REG8(0x0a70), 0x00 },
> +	{ CCI_REG8(0x00a4), 0x80 },
> +	{ CCI_REG8(0x0316), 0x01 },
> +	{ CCI_REG8(0x0a67), 0x00 },
> +	{ CCI_REG8(0x0084), 0x10 },
> +	{ CCI_REG8(0x0102), 0x09 },
> +};
> +
> +static const struct cci_reg_sequence mode_table_common[] = {
> +	{ GC08A3_STRAEMING_REG, 0x00 },
> +	/* system */
> +	{ CCI_REG8(0x031c), 0x60 },
> +	{ CCI_REG8(0x0337), 0x04 },
> +	{ CCI_REG8(0x0335), 0x51 },
> +	{ CCI_REG8(0x0336), 0x70 },
> +	{ CCI_REG8(0x0383), 0xbb },
> +	{ CCI_REG8(0x031a), 0x00 },
> +	{ CCI_REG8(0x0321), 0x10 },
> +	{ CCI_REG8(0x0327), 0x03 },
> +	{ CCI_REG8(0x0325), 0x40 },
> +	{ CCI_REG8(0x0326), 0x23 },
> +	{ CCI_REG8(0x0314), 0x11 },
> +	{ CCI_REG8(0x0315), 0xd6 },
> +	{ CCI_REG8(0x0316), 0x01 },
> +	{ CCI_REG8(0x0334), 0x40 },
> +	{ CCI_REG8(0x0324), 0x42 },
> +	{ CCI_REG8(0x031c), 0x00 },
> +	{ CCI_REG8(0x031c), 0x9f },
> +	{ CCI_REG8(0x039a), 0x13 },
> +	{ CCI_REG8(0x0084), 0x30 },
> +	{ CCI_REG8(0x02b3), 0x08 },
> +	{ CCI_REG8(0x0057), 0x0c },
> +	{ CCI_REG8(0x05c3), 0x50 },
> +	{ CCI_REG8(0x0311), 0x90 },
> +	{ CCI_REG8(0x05a0), 0x02 },
> +	{ CCI_REG8(0x0074), 0x0a },
> +	{ CCI_REG8(0x0059), 0x11 },
> +	{ CCI_REG8(0x0070), 0x05 },
> +	{ CCI_REG8(0x0101), 0x00 },
> +
> +	/* analog */
> +	{ CCI_REG8(0x0344), 0x00 },
> +	{ CCI_REG8(0x0345), 0x06 },
> +	{ CCI_REG8(0x0346), 0x00 },
> +	{ CCI_REG8(0x0347), 0x04 },
> +	{ CCI_REG8(0x0348), 0x0c },
> +	{ CCI_REG8(0x0349), 0xd0 },
> +	{ CCI_REG8(0x034a), 0x09 },
> +	{ CCI_REG8(0x034b), 0x9c },
> +	{ CCI_REG8(0x0202), 0x09 },
> +	{ CCI_REG8(0x0203), 0x04 },
> +
> +	{ CCI_REG8(0x0219), 0x05 },
> +	{ CCI_REG8(0x0226), 0x00 },
> +	{ CCI_REG8(0x0227), 0x28 },
> +	{ CCI_REG8(0x0e0a), 0x00 },
> +	{ CCI_REG8(0x0e0b), 0x00 },
> +	{ CCI_REG8(0x0e24), 0x04 },
> +	{ CCI_REG8(0x0e25), 0x04 },
> +	{ CCI_REG8(0x0e26), 0x00 },
> +	{ CCI_REG8(0x0e27), 0x10 },
> +	{ CCI_REG8(0x0e01), 0x74 },
> +	{ CCI_REG8(0x0e03), 0x47 },
> +	{ CCI_REG8(0x0e04), 0x33 },
> +	{ CCI_REG8(0x0e05), 0x44 },
> +	{ CCI_REG8(0x0e06), 0x44 },
> +	{ CCI_REG8(0x0e0c), 0x1e },
> +	{ CCI_REG8(0x0e17), 0x3a },
> +	{ CCI_REG8(0x0e18), 0x3c },
> +	{ CCI_REG8(0x0e19), 0x40 },
> +	{ CCI_REG8(0x0e1a), 0x42 },
> +	{ CCI_REG8(0x0e28), 0x21 },
> +	{ CCI_REG8(0x0e2b), 0x68 },
> +	{ CCI_REG8(0x0e2c), 0x0d },
> +	{ CCI_REG8(0x0e2d), 0x08 },
> +	{ CCI_REG8(0x0e34), 0xf4 },
> +	{ CCI_REG8(0x0e35), 0x44 },
> +	{ CCI_REG8(0x0e36), 0x07 },
> +	{ CCI_REG8(0x0e38), 0x49 },
> +	{ CCI_REG8(0x0210), 0x13 },
> +	{ CCI_REG8(0x0218), 0x00 },
> +	{ CCI_REG8(0x0241), 0x88 },
> +	{ CCI_REG8(0x0e32), 0x00 },
> +	{ CCI_REG8(0x0e33), 0x18 },
> +	{ CCI_REG8(0x0e42), 0x03 },
> +	{ CCI_REG8(0x0e43), 0x80 },
> +	{ CCI_REG8(0x0e44), 0x04 },
> +	{ CCI_REG8(0x0e45), 0x00 },
> +	{ CCI_REG8(0x0e4f), 0x04 },
> +	{ CCI_REG8(0x057a), 0x20 },
> +	{ CCI_REG8(0x0381), 0x7c },
> +	{ CCI_REG8(0x0382), 0x9b },
> +	{ CCI_REG8(0x0384), 0xfb },
> +	{ CCI_REG8(0x0389), 0x38 },
> +	{ CCI_REG8(0x038a), 0x03 },
> +	{ CCI_REG8(0x0390), 0x6a },
> +	{ CCI_REG8(0x0391), 0x0b },
> +	{ CCI_REG8(0x0392), 0x60 },
> +	{ CCI_REG8(0x0393), 0xc1 },
> +	{ CCI_REG8(0x0396), 0xff },
> +	{ CCI_REG8(0x0398), 0x62 },
> +
> +	/* cisctl reset */
> +	{ CCI_REG8(0x031c), 0x80 },
> +	{ CCI_REG8(0x03fe), 0x10 },
> +	{ CCI_REG8(0x03fe), 0x00 },
> +	{ CCI_REG8(0x031c), 0x9f },
> +	{ CCI_REG8(0x03fe), 0x00 },
> +	{ CCI_REG8(0x03fe), 0x00 },
> +	{ CCI_REG8(0x03fe), 0x00 },
> +	{ CCI_REG8(0x03fe), 0x00 },
> +	{ CCI_REG8(0x031c), 0x80 },
> +	{ CCI_REG8(0x03fe), 0x10 },
> +	{ CCI_REG8(0x03fe), 0x00 },
> +	{ CCI_REG8(0x031c), 0x9f },
> +	{ CCI_REG8(0x0360), 0x01 },
> +	{ CCI_REG8(0x0360), 0x00 },
> +	{ CCI_REG8(0x0316), 0x09 },
> +	{ CCI_REG8(0x0a67), 0x80 },
> +	{ CCI_REG8(0x0313), 0x00 },
> +	{ CCI_REG8(0x0a53), 0x0e },
> +	{ CCI_REG8(0x0a65), 0x17 },
> +	{ CCI_REG8(0x0a68), 0xa1 },
> +	{ CCI_REG8(0x0a58), 0x00 },
> +	{ CCI_REG8(0x0ace), 0x0c },
> +	{ CCI_REG8(0x00a4), 0x00 },
> +	{ CCI_REG8(0x00a5), 0x01 },
> +	{ CCI_REG8(0x00a7), 0x09 },
> +	{ CCI_REG8(0x00a8), 0x9c },
> +	{ CCI_REG8(0x00a9), 0x0c },
> +	{ CCI_REG8(0x00aa), 0xd0 },
> +	{ CCI_REG8(0x0a8a), 0x00 },
> +	{ CCI_REG8(0x0a8b), 0xe0 },
> +	{ CCI_REG8(0x0a8c), 0x13 },
> +	{ CCI_REG8(0x0a8d), 0xe8 },
> +	{ CCI_REG8(0x0a90), 0x0a },
> +	{ CCI_REG8(0x0a91), 0x10 },
> +	{ CCI_REG8(0x0a92), 0xf8 },
> +	{ CCI_REG8(0x0a71), 0xf2 },
> +	{ CCI_REG8(0x0a72), 0x12 },
> +	{ CCI_REG8(0x0a73), 0x64 },
> +	{ CCI_REG8(0x0a75), 0x41 },
> +	{ CCI_REG8(0x0a70), 0x07 },
> +	{ CCI_REG8(0x0313), 0x80 },
> +
> +	/* ISP */
> +	{ CCI_REG8(0x00a0), 0x01 },
> +	{ CCI_REG8(0x0080), 0xd2 },
> +	{ CCI_REG8(0x0081), 0x3f },
> +	{ CCI_REG8(0x0087), 0x51 },
> +	{ CCI_REG8(0x0089), 0x03 },
> +	{ CCI_REG8(0x009b), 0x40 },
> +	{ CCI_REG8(0x05a0), 0x82 },
> +	{ CCI_REG8(0x05ac), 0x00 },
> +	{ CCI_REG8(0x05ad), 0x01 },
> +	{ CCI_REG8(0x05ae), 0x00 },
> +	{ CCI_REG8(0x0800), 0x0a },
> +	{ CCI_REG8(0x0801), 0x14 },
> +	{ CCI_REG8(0x0802), 0x28 },
> +	{ CCI_REG8(0x0803), 0x34 },
> +	{ CCI_REG8(0x0804), 0x0e },
> +	{ CCI_REG8(0x0805), 0x33 },
> +	{ CCI_REG8(0x0806), 0x03 },
> +	{ CCI_REG8(0x0807), 0x8a },
> +	{ CCI_REG8(0x0808), 0x50 },
> +	{ CCI_REG8(0x0809), 0x00 },
> +	{ CCI_REG8(0x080a), 0x34 },
> +	{ CCI_REG8(0x080b), 0x03 },
> +	{ CCI_REG8(0x080c), 0x26 },
> +	{ CCI_REG8(0x080d), 0x03 },
> +	{ CCI_REG8(0x080e), 0x18 },
> +	{ CCI_REG8(0x080f), 0x03 },
> +	{ CCI_REG8(0x0810), 0x10 },
> +	{ CCI_REG8(0x0811), 0x03 },
> +	{ CCI_REG8(0x0812), 0x00 },
> +	{ CCI_REG8(0x0813), 0x00 },
> +	{ CCI_REG8(0x0814), 0x01 },
> +	{ CCI_REG8(0x0815), 0x00 },
> +	{ CCI_REG8(0x0816), 0x01 },
> +	{ CCI_REG8(0x0817), 0x00 },
> +	{ CCI_REG8(0x0818), 0x00 },
> +	{ CCI_REG8(0x0819), 0x0a },
> +	{ CCI_REG8(0x081a), 0x01 },
> +	{ CCI_REG8(0x081b), 0x6c },
> +	{ CCI_REG8(0x081c), 0x00 },
> +	{ CCI_REG8(0x081d), 0x0b },
> +	{ CCI_REG8(0x081e), 0x02 },
> +	{ CCI_REG8(0x081f), 0x00 },
> +	{ CCI_REG8(0x0820), 0x00 },
> +	{ CCI_REG8(0x0821), 0x0c },
> +	{ CCI_REG8(0x0822), 0x02 },
> +	{ CCI_REG8(0x0823), 0xd9 },
> +	{ CCI_REG8(0x0824), 0x00 },
> +	{ CCI_REG8(0x0825), 0x0d },
> +	{ CCI_REG8(0x0826), 0x03 },
> +	{ CCI_REG8(0x0827), 0xf0 },
> +	{ CCI_REG8(0x0828), 0x00 },
> +	{ CCI_REG8(0x0829), 0x0e },
> +	{ CCI_REG8(0x082a), 0x05 },
> +	{ CCI_REG8(0x082b), 0x94 },
> +	{ CCI_REG8(0x082c), 0x09 },
> +	{ CCI_REG8(0x082d), 0x6e },
> +	{ CCI_REG8(0x082e), 0x07 },
> +	{ CCI_REG8(0x082f), 0xe6 },
> +	{ CCI_REG8(0x0830), 0x10 },
> +	{ CCI_REG8(0x0831), 0x0e },
> +	{ CCI_REG8(0x0832), 0x0b },
> +	{ CCI_REG8(0x0833), 0x2c },
> +	{ CCI_REG8(0x0834), 0x14 },
> +	{ CCI_REG8(0x0835), 0xae },
> +	{ CCI_REG8(0x0836), 0x0f },
> +	{ CCI_REG8(0x0837), 0xc4 },
> +	{ CCI_REG8(0x0838), 0x18 },
> +	{ CCI_REG8(0x0839), 0x0e },
> +	{ CCI_REG8(0x05ac), 0x01 },
> +	{ CCI_REG8(0x059a), 0x00 },
> +	{ CCI_REG8(0x059b), 0x00 },
> +	{ CCI_REG8(0x059c), 0x01 },
> +	{ CCI_REG8(0x0598), 0x00 },
> +	{ CCI_REG8(0x0597), 0x14 },
> +	{ CCI_REG8(0x05ab), 0x09 },
> +	{ CCI_REG8(0x05a4), 0x02 },
> +	{ CCI_REG8(0x05a3), 0x05 },
> +	{ CCI_REG8(0x05a0), 0xc2 },
> +	{ CCI_REG8(0x0207), 0xc4 },
> +
> +	/* GAIN */
> +	{ CCI_REG8(0x0208), 0x01 },
> +	{ CCI_REG8(0x0209), 0x72 },
> +	{ CCI_REG8(0x0204), 0x04 },
> +	{ CCI_REG8(0x0205), 0x00 },
> +
> +	{ CCI_REG8(0x0040), 0x22 },
> +	{ CCI_REG8(0x0041), 0x20 },
> +	{ CCI_REG8(0x0043), 0x10 },
> +	{ CCI_REG8(0x0044), 0x00 },
> +	{ CCI_REG8(0x0046), 0x08 },
> +	{ CCI_REG8(0x0047), 0xf0 },
> +	{ CCI_REG8(0x0048), 0x0f },
> +	{ CCI_REG8(0x004b), 0x0f },
> +	{ CCI_REG8(0x004c), 0x00 },
> +	{ CCI_REG8(0x0050), 0x5c },
> +	{ CCI_REG8(0x0051), 0x44 },
> +	{ CCI_REG8(0x005b), 0x03 },
> +	{ CCI_REG8(0x00c0), 0x00 },
> +	{ CCI_REG8(0x00c1), 0x80 },
> +	{ CCI_REG8(0x00c2), 0x31 },
> +	{ CCI_REG8(0x00c3), 0x00 },
> +	{ CCI_REG8(0x0460), 0x04 },
> +	{ CCI_REG8(0x0462), 0x08 },
> +	{ CCI_REG8(0x0464), 0x0e },
> +	{ CCI_REG8(0x0466), 0x0a },
> +	{ CCI_REG8(0x0468), 0x12 },
> +	{ CCI_REG8(0x046a), 0x12 },
> +	{ CCI_REG8(0x046c), 0x10 },
> +	{ CCI_REG8(0x046e), 0x0c },
> +	{ CCI_REG8(0x0461), 0x03 },
> +	{ CCI_REG8(0x0463), 0x03 },
> +	{ CCI_REG8(0x0465), 0x03 },
> +	{ CCI_REG8(0x0467), 0x03 },
> +	{ CCI_REG8(0x0469), 0x04 },
> +	{ CCI_REG8(0x046b), 0x04 },
> +	{ CCI_REG8(0x046d), 0x04 },
> +	{ CCI_REG8(0x046f), 0x04 },
> +	{ CCI_REG8(0x0470), 0x04 },
> +	{ CCI_REG8(0x0472), 0x10 },
> +	{ CCI_REG8(0x0474), 0x26 },
> +	{ CCI_REG8(0x0476), 0x38 },
> +	{ CCI_REG8(0x0478), 0x20 },
> +	{ CCI_REG8(0x047a), 0x30 },
> +	{ CCI_REG8(0x047c), 0x38 },
> +	{ CCI_REG8(0x047e), 0x60 },
> +	{ CCI_REG8(0x0471), 0x05 },
> +	{ CCI_REG8(0x0473), 0x05 },
> +	{ CCI_REG8(0x0475), 0x05 },
> +	{ CCI_REG8(0x0477), 0x05 },
> +	{ CCI_REG8(0x0479), 0x04 },
> +	{ CCI_REG8(0x047b), 0x04 },
> +	{ CCI_REG8(0x047d), 0x04 },
> +	{ CCI_REG8(0x047f), 0x04 },
> +};
> +
> +static const struct gc08a3_link_freq_config link_freq_configs[] = {

Instead of adding such arrays and indices to them, please instead use a
pointer to what corresponds an array entry here. It's easier and less
error-prone.

> +	[GC08A3_LINK_FREQ_336MHZ_INDEX] = {
> +		.reg_list = {
> +			.num_of_regs = ARRAY_SIZE(mode_table_common),
> +			.regs = mode_table_common,
> +		}
> +	},
> +	[GC08A3_LINK_FREQ_207MHZ_INDEX] = {
> +		.reg_list = {
> +			.num_of_regs = ARRAY_SIZE(mode_table_common),
> +			.regs = mode_table_common,
> +		}
> +	},
> +};
> +
> +struct gc08a3_mode {
> +	u32 width;
> +	u32 height;
> +	const struct gc08a3_reg_list reg_list;
> +
> +	u32 hts; /* Horizontal timining size */
> +	u32 vts_def; /* Default vertical timining size */
> +	u32 vts_min; /* Min vertical timining size */
> +	u32 link_freq_index; /* Link frequency needed for this resolution */
> +	u32 max_framerate;
> +};
> +
> +/*
> + * Declare modes in order, from biggest
> + * to smallest height.
> + */
> +static const struct gc08a3_mode gc08a3_modes[] = {
> +	{
> +		.width = GC08A3_NATIVE_WIDTH,
> +		.height = GC08A3_NATIVE_HEIGHT,
> +		.reg_list = {
> +			.num_of_regs = ARRAY_SIZE(mode_3264x2448),
> +			.regs = mode_3264x2448,
> +		},
> +		.link_freq_index = GC08A3_LINK_FREQ_336MHZ_INDEX,

This should be a reference to a data structure specific to 366 MHz link
frequency.

> +
> +		.hts = GC08A3_HTS_30FPS,
> +		.vts_def = GC08A3_VTS_30FPS,
> +		.vts_min = GC08A3_VTS_30FPS_MIN,
> +		.max_framerate = 300,
> +	},
> +	{
> +		.width = 1920,
> +		.height = 1080,
> +		.reg_list = {
> +			.num_of_regs = ARRAY_SIZE(mode_1920x1080),
> +			.regs = mode_1920x1080,
> +		},
> +		.link_freq_index = GC08A3_LINK_FREQ_207MHZ_INDEX,
> +
> +		.hts = GC08A3_HTS_60FPS,
> +		.vts_def = GC08A3_VTS_60FPS,
> +		.vts_min = GC08A3_VTS_60FPS_MIN,
> +		.max_framerate = 600,
> +	},
> +};
> +
> +static u64 to_pixel_rate(u32 f_index)
> +{
> +	u64 pixel_rate = link_freq_menu_items[f_index] * 2 * GC08A3_DATA_LANES;
> +
> +	do_div(pixel_rate, GC08A3_RGB_DEPTH);
> +
> +	return pixel_rate;
> +}
> +
> +static int gc08a3_identify_module(struct gc08a3 *gc08a3)
> +{
> +	struct i2c_client *client = v4l2_get_subdevdata(&gc08a3->sd);
> +	u64 val = 0;
> +	int ret;
> +
> +	ret = cci_read(gc08a3->regmap, GC08A3_REG_CHIP_ID, &val, NULL);
> +	if (ret) {
> +		dev_err(&client->dev, "failed to read chip id: 0x%x", GC08A3_CHIP_ID);
> +		return ret;
> +	}
> +
> +	if (val != GC08A3_CHIP_ID) {
> +		dev_err(&client->dev, "chip id mismatch: 0x%x!=0x%llx",
> +			GC08A3_CHIP_ID, val);
> +		return -ENXIO;
> +	}
> +
> +	return 0;
> +}
> +
> +static inline struct gc08a3 *to_gc08a3(struct v4l2_subdev *sd)
> +{
> +	return container_of(sd, struct gc08a3, sd);
> +}
> +
> +static int gc08a3_power_on(struct device *dev)
> +{
> +	struct i2c_client *client = to_i2c_client(dev);
> +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> +	struct gc08a3 *gc08a3 = to_gc08a3(sd);
> +	int ret;
> +
> +	ret = regulator_bulk_enable(GC08A3_NUM_SUPPLIES, gc08a3->supplies);
> +	if (ret < 0) {
> +		dev_err(gc08a3->dev, "failed to enable regulators: %d\n", ret);
> +		return ret;
> +	}
> +
> +	ret = clk_prepare_enable(gc08a3->xclk);
> +	if (ret < 0) {
> +		regulator_bulk_disable(GC08A3_NUM_SUPPLIES, gc08a3->supplies);
> +		dev_err(gc08a3->dev, "clk prepare enable failed\n");
> +		return ret;
> +	}
> +
> +	usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
> +
> +	gpiod_set_value_cansleep(gc08a3->reset_gpio, 1);
> +	usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
> +
> +	return 0;
> +}
> +
> +static int gc08a3_power_off(struct device *dev)
> +{
> +	struct i2c_client *client = to_i2c_client(dev);
> +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> +	struct gc08a3 *gc08a3 = to_gc08a3(sd);
> +
> +	clk_disable_unprepare(gc08a3->xclk);
> +
> +	usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
> +
> +	gpiod_set_value_cansleep(gc08a3->reset_gpio, 0);
> +	usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
> +
> +	regulator_bulk_disable(GC08A3_NUM_SUPPLIES, gc08a3->supplies);
> +	usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
> +
> +	return 0;
> +}
> +
> +static int gc08a3_enum_mbus_code(struct v4l2_subdev *sd,
> +				 struct v4l2_subdev_state *sd_state,
> +				 struct v4l2_subdev_mbus_code_enum *code)
> +{
> +	if (code->index > 0)
> +		return -EINVAL;
> +
> +	code->code = GC08A3_MBUS_CODE;
> +
> +	return 0;
> +}
> +
> +static int gc08a3_enum_frame_size(struct v4l2_subdev *subdev,
> +				  struct v4l2_subdev_state *sd_state,
> +				  struct v4l2_subdev_frame_size_enum *fse)
> +{
> +	if (fse->code != GC08A3_MBUS_CODE)
> +		return -EINVAL;
> +
> +	if (fse->index >= ARRAY_SIZE(gc08a3_modes))
> +		return -EINVAL;
> +
> +	fse->min_width = gc08a3_modes[fse->index].width;
> +	fse->max_width = gc08a3_modes[fse->index].width;
> +	fse->min_height = gc08a3_modes[fse->index].height;
> +	fse->max_height = gc08a3_modes[fse->index].height;
> +
> +	return 0;
> +}
> +
> +static int gc08a3_update_cur_mode_controls(struct gc08a3 *gc08a3, const struct gc08a3_mode *mode)
> +{
> +	s64 exposure_max, h_blank;
> +	int ret = 0;
> +
> +	ret = __v4l2_ctrl_modify_range(gc08a3->vblank,
> +				       mode->vts_min - mode->height,
> +				       GC08A3_VTS_MAX - mode->height, 1,
> +				       mode->vts_def - mode->height);
> +	if (ret)
> +		dev_err(gc08a3->dev, "VB ctrl range update failed\n");
> +
> +	h_blank = mode->hts - mode->width;
> +	ret = __v4l2_ctrl_modify_range(gc08a3->hblank, h_blank, h_blank, 1,
> +				       h_blank);
> +	if (ret)
> +		dev_err(gc08a3->dev, "HB ctrl range update failed\n");
> +
> +	exposure_max = mode->vts_def - GC08A3_EXP_MARGIN;
> +	ret = __v4l2_ctrl_modify_range(gc08a3->exposure, GC08A3_EXP_MIN,
> +				       exposure_max, GC08A3_EXP_STEP,
> +				       exposure_max);
> +	if (ret)
> +		dev_err(gc08a3->dev, "exposure ctrl range update failed\n");
> +
> +	return ret;
> +}
> +
> +static void gc08a3_update_pad_format(struct gc08a3 *gc08a3,
> +				     const struct gc08a3_mode *mode,
> +				     struct v4l2_mbus_framefmt *fmt)
> +{
> +	fmt->width = mode->width;
> +	fmt->height = mode->height;
> +	fmt->code = GC08A3_MBUS_CODE;
> +	fmt->field = V4L2_FIELD_NONE;
> +	fmt->colorspace = V4L2_COLORSPACE_SRGB;
> +	fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
> +	fmt->quantization =
> +		V4L2_MAP_QUANTIZATION_DEFAULT(true, fmt->colorspace, fmt->ycbcr_enc);
> +	fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
> +}
> +
> +static int gc08a3_set_format(struct v4l2_subdev *sd,
> +			     struct v4l2_subdev_state *state,
> +			     struct v4l2_subdev_format *fmt)
> +{
> +	struct gc08a3 *gc08a3 = to_gc08a3(sd);
> +	struct v4l2_mbus_framefmt *mbus_fmt;
> +	struct v4l2_rect *crop;
> +	const struct gc08a3_mode *mode;
> +
> +	mode = v4l2_find_nearest_size(gc08a3_modes, ARRAY_SIZE(gc08a3_modes),
> +				      width, height, fmt->format.width,
> +				      fmt->format.height);
> +
> +	/*update crop info to subdev state*/
> +	crop = v4l2_subdev_state_get_crop(state, 0);
> +	crop->width = mode->width;
> +	crop->height = mode->height;
> +
> +	/*update fmt info to subdev state*/
> +	gc08a3_update_pad_format(gc08a3, mode, &fmt->format);
> +	mbus_fmt = v4l2_subdev_state_get_format(state, 0);
> +	*mbus_fmt = fmt->format;
> +
> +	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
> +		return 0;
> +
> +	gc08a3->cur_mode = mode;
> +	gc08a3_update_cur_mode_controls(gc08a3, mode);
> +
> +	return 0;
> +}
> +
> +static int gc08a3_get_selection(struct v4l2_subdev *sd,
> +				struct v4l2_subdev_state *state,
> +				struct v4l2_subdev_selection *sel)
> +{
> +	struct gc08a3 *gc08a3 = to_gc08a3(sd);
> +
> +	switch (sel->target) {
> +	case V4L2_SEL_TGT_CROP:
> +		sel->r = *v4l2_subdev_state_get_crop(state, 0);
> +		break;
> +	case V4L2_SEL_TGT_CROP_BOUNDS:
> +		sel->r.top = 0;
> +		sel->r.left = 0;
> +		sel->r.width = GC08A3_NATIVE_WIDTH;
> +		sel->r.height = GC08A3_NATIVE_HEIGHT;
> +		break;
> +	case V4L2_SEL_TGT_CROP_DEFAULT:
> +		if (gc08a3->cur_mode->width == GC08A3_NATIVE_WIDTH) {
> +			sel->r.top = 0;
> +			sel->r.left = 0;
> +			sel->r.width = GC08A3_NATIVE_WIDTH;
> +			sel->r.height = GC08A3_NATIVE_HEIGHT;

Couuld you obtain these from the mode?

> +		} else {
> +			sel->r.top = 0;
> +			sel->r.left = 0;
> +			sel->r.width = 1920;
> +			sel->r.height = 1080;

This, too?

> +		}
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static int gc08a3_init_state(struct v4l2_subdev *sd,
> +			     struct v4l2_subdev_state *state)
> +{
> +	struct v4l2_subdev_format fmt = {
> +		.which = V4L2_SUBDEV_FORMAT_TRY,
> +		.pad = 0,
> +		.format = {
> +			.code = GC08A3_MBUS_CODE,
> +			.width = gc08a3_modes[0].width,
> +			.height = gc08a3_modes[0].height,
> +		},
> +	};
> +
> +	gc08a3_set_format(sd, state, &fmt);
> +
> +	return 0;
> +}
> +
> +static int gc08a3_set_ctrl_hflip(struct gc08a3 *gc08a3, u32 ctrl_val)
> +{
> +	int ret;
> +	u64 val;
> +
> +	ret = cci_read(gc08a3->regmap, GC08A3_FLIP_REG, &val, NULL);
> +	if (ret) {
> +		dev_err(gc08a3->dev, "read hflip register failed: %d\n", ret);
> +		return ret;
> +	}
> +
> +	val = ctrl_val ? (val | GC08A3_FLIP_H_MASK) :
> +			   (val & ~GC08A3_FLIP_H_MASK);
> +	ret = cci_write(gc08a3->regmap, GC08A3_FLIP_REG, val, NULL);
> +	if (ret < 0)
> +		dev_err(gc08a3->dev, "Error %d\n", ret);
> +
> +	return ret;
> +}
> +
> +static int gc08a3_set_ctrl_vflip(struct gc08a3 *gc08a3, u32 ctrl_val)
> +{
> +	int ret;
> +	u64 val;
> +
> +	ret = cci_read(gc08a3->regmap, GC08A3_FLIP_REG, &val, NULL);
> +	if (ret) {
> +		dev_err(gc08a3->dev, "read vflip register failed: %d\n", ret);
> +		return ret;
> +	}
> +
> +	val = ctrl_val ? (val | GC08A3_FLIP_V_MASK) :
> +			   (val & ~GC08A3_FLIP_V_MASK);
> +	ret = cci_write(gc08a3->regmap, GC08A3_FLIP_REG, val, NULL);
> +	if (ret < 0)
> +		dev_err(gc08a3->dev, "Error %d\n", ret);
> +
> +	return ret;
> +}
> +
> +static int gc08a3_test_pattern(struct gc08a3 *gc08a3, u32 pattern_menu)
> +{
> +	int ret = 0;

Please declare ret as last. Elsewhere, too.

> +	u32 pattern = 0;
> +
> +	if (pattern_menu) {
> +		switch (pattern_menu) {
> +		case 1:
> +			pattern = 0x00;
> +			break;
> +		case 2:
> +			pattern = 0x10;
> +			break;
> +		case 3:
> +		case 4:
> +		case 5:
> +		case 6:
> +		case 7:
> +			pattern = pattern_menu + 1;
> +			break;
> +		}
> +
> +		ret = cci_write(gc08a3->regmap, GC08A3_REG_TEST_PATTERN_EN,
> +				GC08A3_TEST_PATTERN_EN, NULL);
> +		if (ret) {
> +			dev_err(gc08a3->dev, "test pattern enable failed: %d\n", ret);

I'm not sure how useful these separate debug prints are. Error handling
could be simplified without them nonetheless.

> +			return ret;
> +		}
> +
> +		ret = cci_write(gc08a3->regmap, GC08A3_REG_TEST_PATTERN_IDX,
> +				pattern, NULL);
> +		if (ret < 0)
> +			dev_err(gc08a3->dev, "Error %d\n", ret);
> +
> +	} else {
> +		ret = cci_write(gc08a3->regmap, GC08A3_REG_TEST_PATTERN_EN,
> +				0x00, NULL);
> +		if (ret < 0)
> +			dev_err(gc08a3->dev, "test pattern disable failed: %d\n", ret);
> +	}
> +
> +	return ret;
> +}
> +
> +static int gc08a3_set_ctrl(struct v4l2_ctrl *ctrl)
> +{
> +	struct gc08a3 *gc08a3 =
> +		container_of(ctrl->handler, struct gc08a3, ctrls);
> +	int ret = 0;
> +	s64 exposure_max;
> +
> +	if (ctrl->id == V4L2_CID_VBLANK) {
> +		/* Update max exposure while meeting expected vblanking */
> +		exposure_max = gc08a3->cur_mode->height + ctrl->val -
> +			       GC08A3_EXP_MARGIN;
> +		__v4l2_ctrl_modify_range(gc08a3->exposure,
> +					 gc08a3->exposure->minimum,
> +					 exposure_max, gc08a3->exposure->step,
> +					 exposure_max);
> +	}
> +
> +	/*
> +	 * Applying V4L2 control value only happens
> +	 * when power is on for streaming
> +	 */
> +	if (!pm_runtime_get_if_in_use(gc08a3->dev))
> +		return 0;
> +
> +	switch (ctrl->id) {
> +	case V4L2_CID_EXPOSURE:
> +		ret = cci_write(gc08a3->regmap, GC08A3_EXP_REG, ctrl->val, NULL);
> +		break;
> +
> +	case V4L2_CID_ANALOGUE_GAIN:
> +		ret = cci_write(gc08a3->regmap, GC08A3_AGAIN_REG, ctrl->val, NULL);

Please run:

	./scripts/checkpatch.pl --strict --max-line-length=80

> +		break;
> +
> +	case V4L2_CID_VBLANK:
> +		ret = cci_write(gc08a3->regmap, GC08A3_FRAME_LENGTH_REG,
> +				gc08a3->cur_mode->height + ctrl->val, NULL);
> +		break;
> +
> +	case V4L2_CID_HFLIP:
> +		ret = gc08a3_set_ctrl_hflip(gc08a3, ctrl->val);
> +		break;
> +
> +	case V4L2_CID_VFLIP:
> +		ret = gc08a3_set_ctrl_vflip(gc08a3, ctrl->val);
> +		break;
> +
> +	case V4L2_CID_TEST_PATTERN:
> +		ret = gc08a3_test_pattern(gc08a3, ctrl->val);
> +		break;
> +
> +	default:
> +		break;
> +	}
> +
> +	pm_runtime_put(gc08a3->dev);
> +
> +	return ret;
> +}
> +
> +static const struct v4l2_ctrl_ops gc08a3_ctrl_ops = {
> +	.s_ctrl = gc08a3_set_ctrl,
> +};
> +
> +static int gc08a3_start_streaming(struct gc08a3 *gc08a3)
> +{
> +	const struct gc08a3_mode *mode;
> +	const struct gc08a3_reg_list *reg_list;
> +	int link_freq_index;
> +	int ret;
> +
> +	ret = pm_runtime_resume_and_get(gc08a3->dev);
> +	if (ret < 0)
> +		return ret;
> +
> +	link_freq_index = gc08a3->cur_mode->link_freq_index;
> +
> +	reg_list = &link_freq_configs[link_freq_index].reg_list;
> +	ret = cci_multi_reg_write(gc08a3->regmap,
> +				  reg_list->regs, reg_list->num_of_regs, NULL);
> +	if (ret) {
> +		dev_err(gc08a3->dev, "could not sent common table %d\n", ret);
> +		goto err_rpm_put;
> +	}
> +
> +	mode = gc08a3->cur_mode;
> +	reg_list = &mode->reg_list;
> +	ret = cci_multi_reg_write(gc08a3->regmap,
> +				  reg_list->regs, reg_list->num_of_regs, NULL);
> +	if (ret < 0) {
> +		dev_err(gc08a3->dev, "could not sent mode table %d\n", ret);
> +		goto err_rpm_put;
> +	}
> +
> +	ret = __v4l2_ctrl_handler_setup(&gc08a3->ctrls);
> +	if (ret < 0) {
> +		dev_err(gc08a3->dev, "could not sync v4l2 controls\n");
> +		goto err_rpm_put;
> +	}
> +
> +	ret = cci_write(gc08a3->regmap, GC08A3_STRAEMING_REG, 1, NULL);
> +	if (ret < 0) {
> +		dev_err(gc08a3->dev, "write STRAEMING_REG failed: %d\n", ret);
> +		goto err_rpm_put;
> +	}
> +
> +	return 0;
> +
> +err_rpm_put:
> +	pm_runtime_put(gc08a3->dev);
> +	return ret;
> +}
> +
> +static int gc08a3_stop_streaming(struct gc08a3 *gc08a3)
> +{
> +	int ret;
> +
> +	ret = cci_write(gc08a3->regmap, GC08A3_STRAEMING_REG, 0, NULL);
> +	if (ret < 0)
> +		dev_err(gc08a3->dev, "could not sent stop streaming %d\n", ret);
> +
> +	pm_runtime_put(gc08a3->dev);
> +	return ret;
> +}
> +
> +static int gc08a3_s_stream(struct v4l2_subdev *subdev, int enable)
> +{
> +	struct gc08a3 *gc08a3 = to_gc08a3(subdev);
> +	struct v4l2_subdev_state *state;
> +	int ret;
> +
> +	state = v4l2_subdev_lock_and_get_active_state(subdev);
> +
> +	if (enable)
> +		ret = gc08a3_start_streaming(gc08a3);
> +	else
> +		ret = gc08a3_stop_streaming(gc08a3);
> +
> +	gc08a3->streaming = enable;
> +	v4l2_subdev_unlock_state(state);
> +
> +	return ret;
> +}
> +
> +static int gc08a3_g_mbus_config(struct v4l2_subdev *sd, unsigned int pad,
> +				struct v4l2_mbus_config *config)
> +{
> +	config->type = V4L2_MBUS_CSI2_DPHY;
> +	config->bus.mipi_csi2.num_data_lanes = 4;
> +	config->bus.mipi_csi2.flags = 0;
> +	return 0;

Please drop this, the downstream sub-device can obtain the configuration
from the endpoint.

> +}
> +
> +static int gc08a3_enum_frame_interval(struct v4l2_subdev *subdev,
> +				      struct v4l2_subdev_state *sd_state,
> +				      struct v4l2_subdev_frame_interval_enum *fie)
> +{
> +	unsigned int index = fie->index;
> +	unsigned int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(gc08a3_modes); i++) {
> +		if (fie->width != gc08a3_modes[i].width ||
> +		    fie->height != gc08a3_modes[i].height)
> +			continue;
> +
> +		if (index-- == 0) {
> +			fie->interval.numerator = 1;
> +			fie->interval.denominator = gc08a3_modes[i].max_framerate / 10;
> +			return 0;
> +		}
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static const struct v4l2_subdev_video_ops gc08a3_video_ops = {
> +	.s_stream = gc08a3_s_stream,
> +};
> +
> +static const struct v4l2_subdev_pad_ops gc08a3_subdev_pad_ops = {
> +	.enum_mbus_code = gc08a3_enum_mbus_code,
> +	.enum_frame_size = gc08a3_enum_frame_size,
> +	.enum_frame_interval = gc08a3_enum_frame_interval,
> +	.get_fmt = v4l2_subdev_get_fmt,
> +	.set_fmt = gc08a3_set_format,
> +	.get_selection = gc08a3_get_selection,
> +	.get_mbus_config = gc08a3_g_mbus_config,
> +};
> +
> +static const struct v4l2_subdev_core_ops gc08a3_core_ops = {
> +	.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> +	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
> +};
> +
> +static const struct v4l2_subdev_ops gc08a3_subdev_ops = {
> +	.core = &gc08a3_core_ops,
> +	.video = &gc08a3_video_ops,
> +	.pad = &gc08a3_subdev_pad_ops,
> +};
> +
> +static const struct v4l2_subdev_internal_ops gc08a3_internal_ops = {
> +	.init_state = gc08a3_init_state,
> +};
> +
> +static int gc08a3_get_regulators(struct device *dev, struct gc08a3 *gc08a3)
> +{
> +	unsigned int i;
> +
> +	for (i = 0; i < GC08A3_NUM_SUPPLIES; i++)
> +		gc08a3->supplies[i].supply = gc08a3_supply_name[i];
> +
> +	return devm_regulator_bulk_get(dev, GC08A3_NUM_SUPPLIES,
> +				       gc08a3->supplies);
> +}
> +
> +static int gc08a3_parse_fwnode(struct device *dev)
> +{
> +	struct fwnode_handle *endpoint;
> +	struct v4l2_fwnode_endpoint bus_cfg = {
> +		.bus_type = V4L2_MBUS_CSI2_DPHY,
> +	};
> +	unsigned int i, j;
> +	int ret;
> +
> +	endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
> +	if (!endpoint) {
> +		dev_err(dev, "endpoint node not found\n");
> +		return -EINVAL;
> +	}
> +
> +	ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
> +	if (ret) {
> +		dev_err(dev, "parsing endpoint node failed\n");
> +		goto done;
> +	}
> +
> +	if (!bus_cfg.nr_of_link_frequencies) {
> +		dev_err(dev, "no link frequencies defined");
> +		ret = -EINVAL;
> +		goto done;
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
> +		for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
> +			if (link_freq_menu_items[i] ==
> +			    bus_cfg.link_frequencies[j])
> +				break;
> +		}
> +
> +		if (j == bus_cfg.nr_of_link_frequencies) {
> +			dev_err(dev,
> +				"no link frequency %lld supported, please check DT",
> +				link_freq_menu_items[i]);
> +			ret = -EINVAL;
> +			goto done;
> +		}
> +	}

Please use v4l2_link_freq_to_bitmap() available here
<URL:https://lore.kernel.org/linux-media/20240108151805.55584-2-sakari.ailus@linux.intel.com/T/#u>.
We'll then merge both at the same time.

> +
> +done:
> +	v4l2_fwnode_endpoint_free(&bus_cfg);
> +	fwnode_handle_put(endpoint);
> +	return ret;
> +}
> +
> +static int gc08a3_init_controls(struct gc08a3 *gc08a3)
> +{
> +	struct i2c_client *client = v4l2_get_subdevdata(&gc08a3->sd);
> +	const struct gc08a3_mode *mode = &gc08a3_modes[0];
> +	const struct v4l2_ctrl_ops *ops = &gc08a3_ctrl_ops;
> +	struct v4l2_fwnode_device_properties props;
> +	struct v4l2_ctrl_handler *ctrl_hdlr;
> +	s64 exposure_max, h_blank;
> +	int ret;
> +
> +	ctrl_hdlr = &gc08a3->ctrls;
> +	ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
> +	if (ret)
> +		return ret;
> +
> +	gc08a3->link_freq =
> +		v4l2_ctrl_new_int_menu(ctrl_hdlr,
> +				       &gc08a3_ctrl_ops,
> +				       V4L2_CID_LINK_FREQ,
> +				       ARRAY_SIZE(link_freq_menu_items) - 1,
> +				       0, link_freq_menu_items);
> +	if (gc08a3->link_freq)
> +		gc08a3->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> +
> +	gc08a3->pixel_rate =
> +		v4l2_ctrl_new_std(ctrl_hdlr,
> +				  &gc08a3_ctrl_ops,
> +				  V4L2_CID_PIXEL_RATE, 0,
> +				  to_pixel_rate(GC08A3_LINK_FREQ_336MHZ_INDEX), 1,
> +				  to_pixel_rate(GC08A3_LINK_FREQ_336MHZ_INDEX));
> +
> +	gc08a3->vblank =
> +		v4l2_ctrl_new_std(ctrl_hdlr,
> +				  &gc08a3_ctrl_ops, V4L2_CID_VBLANK,
> +				  mode->vts_min - mode->height,
> +				  GC08A3_VTS_MAX - mode->height, 1,
> +				  mode->vts_def - mode->height);
> +
> +	h_blank = mode->hts - mode->width;
> +	gc08a3->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops,
> +					   V4L2_CID_HBLANK, h_blank, h_blank, 1,
> +					   h_blank);
> +	if (gc08a3->hblank)
> +		gc08a3->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> +
> +	v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops,
> +			  V4L2_CID_ANALOGUE_GAIN, GC08A3_AGAIN_MIN,
> +			  GC08A3_AGAIN_MAX, GC08A3_AGAIN_STEP,
> +			  GC08A3_AGAIN_MIN);
> +
> +	exposure_max = mode->vts_def - GC08A3_EXP_MARGIN;
> +	gc08a3->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops,
> +					     V4L2_CID_EXPOSURE, GC08A3_EXP_MIN,
> +					     exposure_max, GC08A3_EXP_STEP,
> +					     exposure_max);
> +
> +	v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &gc08a3_ctrl_ops,
> +				     V4L2_CID_TEST_PATTERN,
> +				     ARRAY_SIZE(gc08a3_test_pattern_menu) - 1,
> +				     0, 0, gc08a3_test_pattern_menu);
> +
> +	v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops, V4L2_CID_HFLIP, 0,
> +			  1, 1, 0);
> +
> +	v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops, V4L2_CID_VFLIP, 0,
> +			  1, 1, 0);
> +
> +	/* register properties to fwnode (e.g. rotation, orientation) */
> +	ret = v4l2_fwnode_device_parse(&client->dev, &props);
> +	if (ret)
> +		goto error_ctrls;
> +
> +	ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, ops, &props);
> +	if (ret)
> +		goto error_ctrls;
> +
> +	if (ctrl_hdlr->error) {
> +		ret = ctrl_hdlr->error;
> +		goto error_ctrls;
> +	}
> +
> +	gc08a3->sd.ctrl_handler = ctrl_hdlr;
> +
> +	return 0;
> +
> +error_ctrls:
> +	v4l2_ctrl_handler_free(ctrl_hdlr);
> +
> +	return ret;
> +}
> +
> +static int gc08a3_probe(struct i2c_client *client)
> +{
> +	struct device *dev = &client->dev;
> +	struct gc08a3 *gc08a3;
> +	int ret;
> +
> +	ret = gc08a3_parse_fwnode(dev);
> +	if (ret)
> +		return ret;
> +
> +	gc08a3 = devm_kzalloc(dev, sizeof(*gc08a3), GFP_KERNEL);
> +	if (!gc08a3)
> +		return -ENOMEM;
> +
> +	gc08a3->dev = dev;
> +
> +	gc08a3->regmap = devm_cci_regmap_init_i2c(client, 16);
> +	if (IS_ERR(gc08a3->regmap))
> +		return dev_err_probe(dev, PTR_ERR(gc08a3->regmap),
> +				     "failed to init CCI\n");
> +
> +	gc08a3->xclk = devm_clk_get(dev, NULL);
> +	if (IS_ERR(gc08a3->xclk))
> +		return dev_err_probe(dev, PTR_ERR(gc08a3->xclk),
> +				     "failed to get xclk\n");
> +
> +	ret = clk_set_rate(gc08a3->xclk, GC08A3_DEFAULT_CLK_FREQ);
> +	if (ret)
> +		return dev_err_probe(dev, ret,
> +				     "failed to set xclk frequency\n");
> +
> +	ret = gc08a3_get_regulators(dev, gc08a3);
> +	if (ret < 0)
> +		return dev_err_probe(dev, ret,
> +				     "failed to get regulators\n");
> +
> +	gc08a3->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
> +	if (IS_ERR(gc08a3->reset_gpio))
> +		return dev_err_probe(dev, PTR_ERR(gc08a3->reset_gpio),
> +				     "failed to get gpio\n");
> +
> +	v4l2_i2c_subdev_init(&gc08a3->sd, client, &gc08a3_subdev_ops);
> +	gc08a3->sd.internal_ops = &gc08a3_internal_ops;
> +	gc08a3->cur_mode = &gc08a3_modes[0];
> +
> +	ret = gc08a3_power_on(gc08a3->dev);
> +	if (ret)
> +		return dev_err_probe(dev, ret,
> +				     "failed to sensor power on\n");
> +
> +	ret = gc08a3_identify_module(gc08a3);
> +	if (ret) {
> +		dev_err(&client->dev, "failed to find sensor: %d\n", ret);
> +		goto err_power_off;
> +	}
> +
> +	ret = gc08a3_init_controls(gc08a3);
> +	if (ret) {
> +		dev_err(&client->dev, "failed to init controls: %d", ret);
> +		goto err_power_off;
> +	}
> +
> +	gc08a3->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
> +	gc08a3->pad.flags = MEDIA_PAD_FL_SOURCE;
> +	gc08a3->sd.dev = &client->dev;
> +	gc08a3->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> +
> +	ret = media_entity_pads_init(&gc08a3->sd.entity, 1, &gc08a3->pad);
> +	if (ret < 0) {
> +		dev_err(dev, "could not register media entity\n");
> +		goto err_v4l2_ctrl_handler_free;
> +	}
> +
> +	gc08a3->sd.state_lock = gc08a3->ctrls.lock;
> +	ret = v4l2_subdev_init_finalize(&gc08a3->sd);
> +	if (ret < 0) {
> +		dev_err(dev, "v4l2 subdev init error: %d\n", ret);
> +		goto err_media_entity_cleanup;
> +	}
> +
> +	ret = v4l2_async_register_subdev_sensor(&gc08a3->sd);
> +	if (ret < 0) {
> +		dev_err(dev, "could not register v4l2 device\n");
> +		goto err_subdev_cleanup;
> +	}
> +
> +	pm_runtime_set_active(gc08a3->dev);
> +	pm_runtime_enable(gc08a3->dev);
> +	pm_runtime_idle(gc08a3->dev);

You'll need to enable runtime PM before registering the sub-device, please
move all these calls before v4l2_async_register_subdev_sensor().

> +
> +	return 0;
> +
> +err_subdev_cleanup:
> +	v4l2_subdev_cleanup(&gc08a3->sd);
> +
> +err_media_entity_cleanup:
> +	media_entity_cleanup(&gc08a3->sd.entity);
> +
> +err_v4l2_ctrl_handler_free:
> +	v4l2_ctrl_handler_free(gc08a3->sd.ctrl_handler);
> +
> +err_power_off:
> +	gc08a3_power_off(gc08a3->dev);
> +
> +	return ret;
> +}
> +
> +static void gc08a3_remove(struct i2c_client *client)
> +{
> +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> +	struct gc08a3 *gc08a3 = to_gc08a3(sd);
> +
> +	v4l2_async_unregister_subdev(&gc08a3->sd);
> +	v4l2_subdev_cleanup(sd);
> +	media_entity_cleanup(&gc08a3->sd.entity);
> +	v4l2_ctrl_handler_free(&gc08a3->ctrls);
> +
> +	pm_runtime_disable(&client->dev);
> +	if (!pm_runtime_status_suspended(&client->dev))
> +		gc08a3_power_off(gc08a3->dev);
> +	pm_runtime_set_suspended(&client->dev);
> +}
> +
> +static const struct of_device_id gc08a3_of_match[] = {
> +	{ .compatible = "galaxycore,gc08a3" },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, gc08a3_of_match);
> +
> +static const struct dev_pm_ops gc08a3_pm_ops = {
> +	SET_RUNTIME_PM_OPS(gc08a3_power_off, gc08a3_power_on, NULL)
> +};
> +
> +static struct i2c_driver gc08a3_i2c_driver = {
> +	.driver = {
> +		.of_match_table = gc08a3_of_match,
> +		.pm = &gc08a3_pm_ops,
> +		.name  = "gc08a3",
> +	},
> +	.probe  = gc08a3_probe,
> +	.remove = gc08a3_remove,
> +};
> +
> +module_i2c_driver(gc08a3_i2c_driver);
> +
> +MODULE_DESCRIPTION("GalaxyCore gc08a3 Camera driver");
> +MODULE_AUTHOR("Zhi Mao <zhi.mao@mediatek.com>");
> +MODULE_LICENSE("GPL");

-- 
Regards,

Sakari Ailus

Re: [PATCH v3 2/2] media: i2c: Add GC08A3 image sensor driver

[Zhi Mao (毛智)]

Hi Sakari

Thanks for your review code and comments.

On Tue, 2024-01-09 at 10:18 +0000, Sakari Ailus wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  Hi Zhi,
> 
> Thanks for the update.
> 
> On Tue, Jan 09, 2024 at 10:27:15AM +0800, Zhi Mao wrote:
> > Add a V4L2 sub-device driver for Galaxycore GC08A3 image sensor.
> > 
> > Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>
> > ---
> >  drivers/media/i2c/Kconfig  |   10 +
> >  drivers/media/i2c/Makefile |    1 +
> >  drivers/media/i2c/gc08a3.c | 1467
> ++++++++++++++++++++++++++++++++++++
> >  3 files changed, 1478 insertions(+)
> >  create mode 100644 drivers/media/i2c/gc08a3.c
> > 
> > +for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
> > +for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
> > +if (link_freq_menu_items[i] ==
> > +    bus_cfg.link_frequencies[j])
> > +break;
> > +}
> > +
> > +if (j == bus_cfg.nr_of_link_frequencies) {
> > +dev_err(dev,
> > +"no link frequency %lld supported, please check DT",
> > +link_freq_menu_items[i]);
> > +ret = -EINVAL;
> > +goto done;
> > +}
> > +}
> 
> Please use v4l2_link_freq_to_bitmap() available here
> <URL:
> https://lore.kernel.org/linux-media/20240108151805.55584-2-sakari.ailus@linux.intel.com/T/#u>
> ;.
> We'll then merge both at the same time.
> 

After got the latest linux kernel code base(tag: next-20240124), there
seems to be not new API:v4l2_link_freq_to_bitmap() still.

Would you please let me know, how about the status about this API?

Thanks & Regards,
Zhi

Re: [PATCH v3 2/2] media: i2c: Add GC08A3 image sensor driver

[sakari.ailus]

Hi Zhi,

On Thu, Jan 25, 2024 at 02:24:52AM +0000, Zhi Mao (毛智) wrote:
> Hi Sakari
> 
> Thanks for your review code and comments.
> 
> On Tue, 2024-01-09 at 10:18 +0000, Sakari Ailus wrote:
> >  	 
> > External email : Please do not click links or open attachments until
> > you have verified the sender or the content.
> >  Hi Zhi,
> > 
> > Thanks for the update.
> > 
> > On Tue, Jan 09, 2024 at 10:27:15AM +0800, Zhi Mao wrote:
> > > Add a V4L2 sub-device driver for Galaxycore GC08A3 image sensor.
> > > 
> > > Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>
> > > ---
> > >  drivers/media/i2c/Kconfig  |   10 +
> > >  drivers/media/i2c/Makefile |    1 +
> > >  drivers/media/i2c/gc08a3.c | 1467
> > ++++++++++++++++++++++++++++++++++++
> > >  3 files changed, 1478 insertions(+)
> > >  create mode 100644 drivers/media/i2c/gc08a3.c
> > > 
> > > +for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
> > > +for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
> > > +if (link_freq_menu_items[i] ==
> > > +    bus_cfg.link_frequencies[j])
> > > +break;
> > > +}
> > > +
> > > +if (j == bus_cfg.nr_of_link_frequencies) {
> > > +dev_err(dev,
> > > +"no link frequency %lld supported, please check DT",
> > > +link_freq_menu_items[i]);
> > > +ret = -EINVAL;
> > > +goto done;
> > > +}
> > > +}
> > 
> > Please use v4l2_link_freq_to_bitmap() available here
> > <URL:
> > https://lore.kernel.org/linux-media/20240108151805.55584-2-sakari.ailus@linux.intel.com/T/#u>
> > ;.
> > We'll then merge both at the same time.
> > 
> 
> After got the latest linux kernel code base(tag: next-20240124), there
> seems to be not new API:v4l2_link_freq_to_bitmap() still.
> 
> Would you please let me know, how about the status about this API?

The patches are in my linuxtv.org tree's master branch now:

	https://git.linuxtv.org/sailus/media_tree.git/

-- 
Sakari Ailus

Re: [PATCH v3 2/2] media: i2c: Add GC08A3 image sensor driver

[Zhi Mao (毛智)]

Hi Sakari

Thanks for your review.

On Tue, 2024-01-09 at 10:18 +0000, Sakari Ailus wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  Hi Zhi,
> 
> Thanks for the update.
> 
> On Tue, Jan 09, 2024 at 10:27:15AM +0800, Zhi Mao wrote:
> > Add a V4L2 sub-device driver for Galaxycore GC08A3 image sensor.
> > 
> > Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>
> > ---
> >  drivers/media/i2c/Kconfig  |   10 +
> >  drivers/media/i2c/Makefile |    1 +
> >  drivers/media/i2c/gc08a3.c | 1467
> ++++++++++++++++++++++++++++++++++++
> >  3 files changed, 1478 insertions(+)
> >  create mode 100644 drivers/media/i2c/gc08a3.c
> > 
> > diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> > index 78a87331686e..2e5bd751534b 100644
> > --- a/drivers/media/i2c/Kconfig
> > +++ b/drivers/media/i2c/Kconfig
> > @@ -70,6 +70,16 @@ config VIDEO_GC0308
> >    To compile this driver as a module, choose M here: the
> >    module will be called gc0308.
> >  
> > +config VIDEO_GC08A3
> > +tristate "GalaxyCore gc08a3 sensor support"
> > +select V4L2_CCI_I2C
> > +help
> > +  This is a Video4Linux2 sensor driver for the GalaxyCore gc08a3
> > +  camera.
> > +
> > +  To compile this driver as a module, choose M here: the
> > +  module will be called gc08a3.
> > +
> >  config VIDEO_GC2145
> >  select V4L2_CCI_I2C
> >  tristate "GalaxyCore GC2145 sensor support"
> > diff --git a/drivers/media/i2c/Makefile
> b/drivers/media/i2c/Makefile
> > index dfbe6448b549..b82e99ca7578 100644
> > --- a/drivers/media/i2c/Makefile
> > +++ b/drivers/media/i2c/Makefile
> > @@ -38,6 +38,7 @@ obj-$(CONFIG_VIDEO_DW9768) += dw9768.o
> >  obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o
> >  obj-$(CONFIG_VIDEO_ET8EK8) += et8ek8/
> >  obj-$(CONFIG_VIDEO_GC0308) += gc0308.o
> > +obj-$(CONFIG_VIDEO_GC08A3) += gc08a3.o
> >  obj-$(CONFIG_VIDEO_GC2145) += gc2145.o
> >  obj-$(CONFIG_VIDEO_HI556) += hi556.o
> >  obj-$(CONFIG_VIDEO_HI846) += hi846.o
> > diff --git a/drivers/media/i2c/gc08a3.c
> b/drivers/media/i2c/gc08a3.c
> > new file mode 100644
> > index 000000000000..eea304f0f84d
> > --- /dev/null
> > +++ b/drivers/media/i2c/gc08a3.c
> > @@ -0,0 +1,1467 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * gc08a3.c - gc08a3 sensor driver
> > + *
> > + * Copyright 2023 MediaTek
> > + *
> > + * Zhi Mao <zhi.mao@mediatek.com>
> > + */
> > +
> > +#include <asm/unaligned.h>
> > +#include <linux/clk.h>
> > +#include <linux/delay.h>
> > +#include <linux/gpio/consumer.h>
> > +#include <linux/i2c.h>
> > +#include <linux/module.h>
> > +#include <linux/pm_runtime.h>
> > +#include <linux/regulator/consumer.h>
> > +#include <media/media-entity.h>
> > +#include <media/v4l2-ctrls.h>
> > +#include <media/v4l2-fwnode.h>
> > +#include <media/v4l2-subdev.h>
> > +#include <media/v4l2-cci.h>
> > +#include <media/v4l2-event.h>
> > +
> > +#define GC08A3_REG_CHIP_ID CCI_REG16(0x03f0)
> > +#define GC08A3_CHIP_ID 0x08a3
> > +
> > +#define GC08A3_NATIVE_WIDTH 3264
> > +#define GC08A3_NATIVE_HEIGHT 2448
> > +
> > +#define GC08A3_REG_TEST_PATTERN_EN CCI_REG8(0x008c)
> > +#define GC08A3_REG_TEST_PATTERN_IDX CCI_REG8(0x008d)
> > +#define GC08A3_TEST_PATTERN_EN 0x01
> > +
> > +#define GC08A3_STRAEMING_REG CCI_REG8(0x0100)
> > +
> > +#define GC08A3_DEFAULT_CLK_FREQ 24000000
> > +#define GC08A3_MBUS_CODE MEDIA_BUS_FMT_SRGGB10_1X10
> > +#define GC08A3_DATA_LANES 4
> > +
> > +/* for 1920*1080 */
> > +#define GC08A3_LINK_FREQ_207MHZ 207000000ULL
> > +/* for 3264*2448 */
> > +#define GC08A3_LINK_FREQ_336MHZ 336000000ULL
> > +
> > +#define GC08A3_RGB_DEPTH 10
> > +
> > +#define GC08A3_FRAME_LENGTH_REG CCI_REG16(0x0340)
> > +#define GC08A3_VTS_30FPS 2548
> > +#define GC08A3_VTS_30FPS_MIN 2548
> > +#define GC08A3_VTS_60FPS 1276
> > +#define GC08A3_VTS_60FPS_MIN 1276
> > +#define GC08A3_VTS_MAX 0xfff0
> > +
> > +#define GC08A3_HTS_30FPS 3640
> > +#define GC08A3_HTS_60FPS 3640
> > +
> > +#define GC08A3_EXP_REG CCI_REG16(0x0202)
> > +#define GC08A3_EXP_MARGIN 16
> > +#define GC08A3_EXP_MIN 4
> > +#define GC08A3_EXP_STEP 1
> > +
> > +#define GC08A3_FLIP_REG CCI_REG8(0x0101)
> > +#define GC08A3_FLIP_H_MASK 0x1
> > +#define GC08A3_FLIP_V_MASK 0x2
> > +
> > +#define GC08A3_AGAIN_REG CCI_REG16(0x0204)
> > +#define GC08A3_AGAIN_MIN 1024
> > +#define GC08A3_AGAIN_MAX (1024 * 16)
> > +#define GC08A3_AGAIN_STEP 1
> > +
> > +#define GC08A3_MIN_SLEEP_US  2000
> > +#define GC08A3_MAX_SLEEP_US  3000
> > +
> > +static const char *const gc08a3_test_pattern_menu[] = {
> > +"No Pattern", "Solid Black", "Colour Bar", "Solid White",
> > +"Solid Red", "Solid Green", "Solid Blue", "Solid Yellow",
> > +};
> > +
> > +enum {
> > +GC08A3_LINK_FREQ_336MHZ_INDEX,
> > +GC08A3_LINK_FREQ_207MHZ_INDEX,
> > +};
> > +
> > +static const s64 link_freq_menu_items[] = {
> > +GC08A3_LINK_FREQ_336MHZ,
> > +GC08A3_LINK_FREQ_207MHZ,
> > +};
> > +
> > +static const char *const gc08a3_supply_name[] = {
> > +"avdd",
> > +"dvdd",
> > +"dovdd",
> > +};
> > +
> > +#define GC08A3_NUM_SUPPLIES ARRAY_SIZE(gc08a3_supply_name)
> 
> Please don't add such macros, use ARRAY_SIZE(...) directly.
> 
fixed in patch:v4.

> > +
> > +struct gc08a3 {
> > +struct device *dev;
> > +struct v4l2_subdev sd;
> > +struct media_pad pad;
> > +struct i2c_client *client;
> > +
> > +struct clk *xclk;
> > +struct regulator_bulk_data supplies[GC08A3_NUM_SUPPLIES];
> > +struct gpio_desc *reset_gpio;
> > +
> > +struct v4l2_ctrl_handler ctrls;
> > +struct v4l2_ctrl *pixel_rate;
> > +struct v4l2_ctrl *link_freq;
> > +struct v4l2_ctrl *exposure;
> > +struct v4l2_ctrl *vblank;
> > +struct v4l2_ctrl *hblank;
> > +
> > +struct regmap *regmap;
> > +
> > +bool streaming;
> > +
> > +/* Current mode */
> > +const struct gc08a3_mode *cur_mode;
> > +};
> > +
> > +struct gc08a3_reg_list {
> > +u32 num_of_regs;
> > +const struct cci_reg_sequence *regs;
> > +};
> > +
> > +struct gc08a3_link_freq_config {
> > +const struct gc08a3_reg_list reg_list;
> > +};
> > +
> > +static const struct cci_reg_sequence mode_3264x2448[] = {
> > +/* system */
> > +{ CCI_REG8(0x0336), 0x70 },
> > +{ CCI_REG8(0x0383), 0xbb },
> > +{ CCI_REG8(0x0344), 0x00 },
> > +{ CCI_REG8(0x0345), 0x06 },
> > +{ CCI_REG8(0x0346), 0x00 },
> > +{ CCI_REG8(0x0347), 0x04 },
> > +{ CCI_REG8(0x0348), 0x0c },
> > +{ CCI_REG8(0x0349), 0xd0 },
> > +{ CCI_REG8(0x034a), 0x09 },
> > +{ CCI_REG8(0x034b), 0x9c },
> > +{ CCI_REG8(0x0202), 0x09 },
> > +{ CCI_REG8(0x0203), 0x04 },
> > +{ CCI_REG8(0x0340), 0x09 },
> > +{ CCI_REG8(0x0341), 0xf4 },
> > +{ CCI_REG8(0x0342), 0x07 },
> > +{ CCI_REG8(0x0343), 0x1c },
> > +
> > +{ CCI_REG8(0x0226), 0x00 },
> > +{ CCI_REG8(0x0227), 0x28 },
> > +{ CCI_REG8(0x0e38), 0x49 },
> > +{ CCI_REG8(0x0210), 0x13 },
> > +{ CCI_REG8(0x0218), 0x00 },
> > +{ CCI_REG8(0x0241), 0x88 },
> > +{ CCI_REG8(0x0392), 0x60 },
> > +
> > +/* ISP */
> > +{ CCI_REG8(0x00a2), 0x00 },
> > +{ CCI_REG8(0x00a3), 0x00 },
> > +{ CCI_REG8(0x00ab), 0x00 },
> > +{ CCI_REG8(0x00ac), 0x00 },
> > +
> > +/* GAIN */
> > +{ CCI_REG8(0x0204), 0x04 },
> > +{ CCI_REG8(0x0205), 0x00 },
> > +{ CCI_REG8(0x0050), 0x5c },
> > +{ CCI_REG8(0x0051), 0x44 },
> > +
> > +/* out window */
> > +{ CCI_REG8(0x009a), 0x66 },
> > +{ CCI_REG8(0x0351), 0x00 },
> > +{ CCI_REG8(0x0352), 0x06 },
> > +{ CCI_REG8(0x0353), 0x00 },
> > +{ CCI_REG8(0x0354), 0x08 },
> > +{ CCI_REG8(0x034c), 0x0c },
> > +{ CCI_REG8(0x034d), 0xc0 },
> > +{ CCI_REG8(0x034e), 0x09 },
> > +{ CCI_REG8(0x034f), 0x90 },
> > +
> > +/* MIPI */
> > +{ CCI_REG8(0x0114), 0x03 },
> > +{ CCI_REG8(0x0180), 0x65 },
> > +{ CCI_REG8(0x0181), 0xf0 },
> > +{ CCI_REG8(0x0185), 0x01 },
> > +{ CCI_REG8(0x0115), 0x30 },
> > +{ CCI_REG8(0x011b), 0x12 },
> > +{ CCI_REG8(0x011c), 0x12 },
> > +{ CCI_REG8(0x0121), 0x06 },
> > +{ CCI_REG8(0x0122), 0x06 },
> > +{ CCI_REG8(0x0123), 0x15 },
> > +{ CCI_REG8(0x0124), 0x01 },
> > +{ CCI_REG8(0x0125), 0x0b },
> > +{ CCI_REG8(0x0126), 0x08 },
> > +{ CCI_REG8(0x0129), 0x06 },
> > +{ CCI_REG8(0x012a), 0x08 },
> > +{ CCI_REG8(0x012b), 0x08 },
> > +
> > +{ CCI_REG8(0x0a73), 0x60 },
> > +{ CCI_REG8(0x0a70), 0x11 },
> > +{ CCI_REG8(0x0313), 0x80 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0a70), 0x00 },
> > +{ CCI_REG8(0x00a4), 0x80 },
> > +{ CCI_REG8(0x0316), 0x01 },
> > +{ CCI_REG8(0x0a67), 0x00 },
> > +{ CCI_REG8(0x0084), 0x10 },
> > +{ CCI_REG8(0x0102), 0x09 },
> > +};
> > +
> > +static const struct cci_reg_sequence mode_1920x1080[] = {
> > +/* system */
> > +{ CCI_REG8(0x0336), 0x45 },
> > +{ CCI_REG8(0x0383), 0x8b },
> > +{ CCI_REG8(0x0344), 0x02 },
> > +{ CCI_REG8(0x0345), 0xa6 },
> > +{ CCI_REG8(0x0346), 0x02 },
> > +{ CCI_REG8(0x0347), 0xb0 },
> > +{ CCI_REG8(0x0348), 0x07 },
> > +{ CCI_REG8(0x0349), 0x90 },
> > +{ CCI_REG8(0x034a), 0x04 },
> > +{ CCI_REG8(0x034b), 0x44 },
> > +{ CCI_REG8(0x0202), 0x03 },
> > +{ CCI_REG8(0x0203), 0x00 },
> > +{ CCI_REG8(0x0340), 0x04 },
> > +{ CCI_REG8(0x0341), 0xfc },
> > +{ CCI_REG8(0x0342), 0x07 },
> > +{ CCI_REG8(0x0343), 0x1c },
> > +{ CCI_REG8(0x0226), 0x00 },
> > +{ CCI_REG8(0x0227), 0x88 },
> > +{ CCI_REG8(0x0e38), 0x49 },
> > +{ CCI_REG8(0x0210), 0x13 },
> > +{ CCI_REG8(0x0218), 0x00 },
> > +{ CCI_REG8(0x0241), 0x88 },
> > +{ CCI_REG8(0x0392), 0x60 },
> > +
> > +/* ISP */
> > +{ CCI_REG8(0x00a2), 0xac },
> > +{ CCI_REG8(0x00a3), 0x02 },
> > +{ CCI_REG8(0x00ab), 0xa0 },
> > +{ CCI_REG8(0x00ac), 0x02 },
> > +
> > +/* GAIN */
> > +{ CCI_REG8(0x0204), 0x04 },
> > +{ CCI_REG8(0x0205), 0x00 },
> > +{ CCI_REG8(0x0050), 0x38 },
> > +{ CCI_REG8(0x0051), 0x20 },
> > +
> > +/* out window */
> > +{ CCI_REG8(0x009a), 0x66 },
> > +{ CCI_REG8(0x0351), 0x00 },
> > +{ CCI_REG8(0x0352), 0x06 },
> > +{ CCI_REG8(0x0353), 0x00 },
> > +{ CCI_REG8(0x0354), 0x08 },
> > +{ CCI_REG8(0x034c), 0x07 },
> > +{ CCI_REG8(0x034d), 0x80 },
> > +{ CCI_REG8(0x034e), 0x04 },
> > +{ CCI_REG8(0x034f), 0x38 },
> > +
> > +/* MIPI */
> > +{ CCI_REG8(0x0114), 0x03 },
> > +{ CCI_REG8(0x0180), 0x65 },
> > +{ CCI_REG8(0x0181), 0xf0 },
> > +{ CCI_REG8(0x0185), 0x01 },
> > +{ CCI_REG8(0x0115), 0x30 },
> > +{ CCI_REG8(0x011b), 0x12 },
> > +{ CCI_REG8(0x011c), 0x12 },
> > +{ CCI_REG8(0x0121), 0x02 },
> > +{ CCI_REG8(0x0122), 0x03 },
> > +{ CCI_REG8(0x0123), 0x0c },
> > +{ CCI_REG8(0x0124), 0x00 },
> > +{ CCI_REG8(0x0125), 0x09 },
> > +{ CCI_REG8(0x0126), 0x06 },
> > +{ CCI_REG8(0x0129), 0x04 },
> > +{ CCI_REG8(0x012a), 0x03 },
> > +{ CCI_REG8(0x012b), 0x06 },
> > +
> > +{ CCI_REG8(0x0a73), 0x60 },
> > +{ CCI_REG8(0x0a70), 0x11 },
> > +{ CCI_REG8(0x0313), 0x80 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0aff), 0x00 },
> > +{ CCI_REG8(0x0a70), 0x00 },
> > +{ CCI_REG8(0x00a4), 0x80 },
> > +{ CCI_REG8(0x0316), 0x01 },
> > +{ CCI_REG8(0x0a67), 0x00 },
> > +{ CCI_REG8(0x0084), 0x10 },
> > +{ CCI_REG8(0x0102), 0x09 },
> > +};
> > +
> > +static const struct cci_reg_sequence mode_table_common[] = {
> > +{ GC08A3_STRAEMING_REG, 0x00 },
> > +/* system */
> > +{ CCI_REG8(0x031c), 0x60 },
> > +{ CCI_REG8(0x0337), 0x04 },
> > +{ CCI_REG8(0x0335), 0x51 },
> > +{ CCI_REG8(0x0336), 0x70 },
> > +{ CCI_REG8(0x0383), 0xbb },
> > +{ CCI_REG8(0x031a), 0x00 },
> > +{ CCI_REG8(0x0321), 0x10 },
> > +{ CCI_REG8(0x0327), 0x03 },
> > +{ CCI_REG8(0x0325), 0x40 },
> > +{ CCI_REG8(0x0326), 0x23 },
> > +{ CCI_REG8(0x0314), 0x11 },
> > +{ CCI_REG8(0x0315), 0xd6 },
> > +{ CCI_REG8(0x0316), 0x01 },
> > +{ CCI_REG8(0x0334), 0x40 },
> > +{ CCI_REG8(0x0324), 0x42 },
> > +{ CCI_REG8(0x031c), 0x00 },
> > +{ CCI_REG8(0x031c), 0x9f },
> > +{ CCI_REG8(0x039a), 0x13 },
> > +{ CCI_REG8(0x0084), 0x30 },
> > +{ CCI_REG8(0x02b3), 0x08 },
> > +{ CCI_REG8(0x0057), 0x0c },
> > +{ CCI_REG8(0x05c3), 0x50 },
> > +{ CCI_REG8(0x0311), 0x90 },
> > +{ CCI_REG8(0x05a0), 0x02 },
> > +{ CCI_REG8(0x0074), 0x0a },
> > +{ CCI_REG8(0x0059), 0x11 },
> > +{ CCI_REG8(0x0070), 0x05 },
> > +{ CCI_REG8(0x0101), 0x00 },
> > +
> > +/* analog */
> > +{ CCI_REG8(0x0344), 0x00 },
> > +{ CCI_REG8(0x0345), 0x06 },
> > +{ CCI_REG8(0x0346), 0x00 },
> > +{ CCI_REG8(0x0347), 0x04 },
> > +{ CCI_REG8(0x0348), 0x0c },
> > +{ CCI_REG8(0x0349), 0xd0 },
> > +{ CCI_REG8(0x034a), 0x09 },
> > +{ CCI_REG8(0x034b), 0x9c },
> > +{ CCI_REG8(0x0202), 0x09 },
> > +{ CCI_REG8(0x0203), 0x04 },
> > +
> > +{ CCI_REG8(0x0219), 0x05 },
> > +{ CCI_REG8(0x0226), 0x00 },
> > +{ CCI_REG8(0x0227), 0x28 },
> > +{ CCI_REG8(0x0e0a), 0x00 },
> > +{ CCI_REG8(0x0e0b), 0x00 },
> > +{ CCI_REG8(0x0e24), 0x04 },
> > +{ CCI_REG8(0x0e25), 0x04 },
> > +{ CCI_REG8(0x0e26), 0x00 },
> > +{ CCI_REG8(0x0e27), 0x10 },
> > +{ CCI_REG8(0x0e01), 0x74 },
> > +{ CCI_REG8(0x0e03), 0x47 },
> > +{ CCI_REG8(0x0e04), 0x33 },
> > +{ CCI_REG8(0x0e05), 0x44 },
> > +{ CCI_REG8(0x0e06), 0x44 },
> > +{ CCI_REG8(0x0e0c), 0x1e },
> > +{ CCI_REG8(0x0e17), 0x3a },
> > +{ CCI_REG8(0x0e18), 0x3c },
> > +{ CCI_REG8(0x0e19), 0x40 },
> > +{ CCI_REG8(0x0e1a), 0x42 },
> > +{ CCI_REG8(0x0e28), 0x21 },
> > +{ CCI_REG8(0x0e2b), 0x68 },
> > +{ CCI_REG8(0x0e2c), 0x0d },
> > +{ CCI_REG8(0x0e2d), 0x08 },
> > +{ CCI_REG8(0x0e34), 0xf4 },
> > +{ CCI_REG8(0x0e35), 0x44 },
> > +{ CCI_REG8(0x0e36), 0x07 },
> > +{ CCI_REG8(0x0e38), 0x49 },
> > +{ CCI_REG8(0x0210), 0x13 },
> > +{ CCI_REG8(0x0218), 0x00 },
> > +{ CCI_REG8(0x0241), 0x88 },
> > +{ CCI_REG8(0x0e32), 0x00 },
> > +{ CCI_REG8(0x0e33), 0x18 },
> > +{ CCI_REG8(0x0e42), 0x03 },
> > +{ CCI_REG8(0x0e43), 0x80 },
> > +{ CCI_REG8(0x0e44), 0x04 },
> > +{ CCI_REG8(0x0e45), 0x00 },
> > +{ CCI_REG8(0x0e4f), 0x04 },
> > +{ CCI_REG8(0x057a), 0x20 },
> > +{ CCI_REG8(0x0381), 0x7c },
> > +{ CCI_REG8(0x0382), 0x9b },
> > +{ CCI_REG8(0x0384), 0xfb },
> > +{ CCI_REG8(0x0389), 0x38 },
> > +{ CCI_REG8(0x038a), 0x03 },
> > +{ CCI_REG8(0x0390), 0x6a },
> > +{ CCI_REG8(0x0391), 0x0b },
> > +{ CCI_REG8(0x0392), 0x60 },
> > +{ CCI_REG8(0x0393), 0xc1 },
> > +{ CCI_REG8(0x0396), 0xff },
> > +{ CCI_REG8(0x0398), 0x62 },
> > +
> > +/* cisctl reset */
> > +{ CCI_REG8(0x031c), 0x80 },
> > +{ CCI_REG8(0x03fe), 0x10 },
> > +{ CCI_REG8(0x03fe), 0x00 },
> > +{ CCI_REG8(0x031c), 0x9f },
> > +{ CCI_REG8(0x03fe), 0x00 },
> > +{ CCI_REG8(0x03fe), 0x00 },
> > +{ CCI_REG8(0x03fe), 0x00 },
> > +{ CCI_REG8(0x03fe), 0x00 },
> > +{ CCI_REG8(0x031c), 0x80 },
> > +{ CCI_REG8(0x03fe), 0x10 },
> > +{ CCI_REG8(0x03fe), 0x00 },
> > +{ CCI_REG8(0x031c), 0x9f },
> > +{ CCI_REG8(0x0360), 0x01 },
> > +{ CCI_REG8(0x0360), 0x00 },
> > +{ CCI_REG8(0x0316), 0x09 },
> > +{ CCI_REG8(0x0a67), 0x80 },
> > +{ CCI_REG8(0x0313), 0x00 },
> > +{ CCI_REG8(0x0a53), 0x0e },
> > +{ CCI_REG8(0x0a65), 0x17 },
> > +{ CCI_REG8(0x0a68), 0xa1 },
> > +{ CCI_REG8(0x0a58), 0x00 },
> > +{ CCI_REG8(0x0ace), 0x0c },
> > +{ CCI_REG8(0x00a4), 0x00 },
> > +{ CCI_REG8(0x00a5), 0x01 },
> > +{ CCI_REG8(0x00a7), 0x09 },
> > +{ CCI_REG8(0x00a8), 0x9c },
> > +{ CCI_REG8(0x00a9), 0x0c },
> > +{ CCI_REG8(0x00aa), 0xd0 },
> > +{ CCI_REG8(0x0a8a), 0x00 },
> > +{ CCI_REG8(0x0a8b), 0xe0 },
> > +{ CCI_REG8(0x0a8c), 0x13 },
> > +{ CCI_REG8(0x0a8d), 0xe8 },
> > +{ CCI_REG8(0x0a90), 0x0a },
> > +{ CCI_REG8(0x0a91), 0x10 },
> > +{ CCI_REG8(0x0a92), 0xf8 },
> > +{ CCI_REG8(0x0a71), 0xf2 },
> > +{ CCI_REG8(0x0a72), 0x12 },
> > +{ CCI_REG8(0x0a73), 0x64 },
> > +{ CCI_REG8(0x0a75), 0x41 },
> > +{ CCI_REG8(0x0a70), 0x07 },
> > +{ CCI_REG8(0x0313), 0x80 },
> > +
> > +/* ISP */
> > +{ CCI_REG8(0x00a0), 0x01 },
> > +{ CCI_REG8(0x0080), 0xd2 },
> > +{ CCI_REG8(0x0081), 0x3f },
> > +{ CCI_REG8(0x0087), 0x51 },
> > +{ CCI_REG8(0x0089), 0x03 },
> > +{ CCI_REG8(0x009b), 0x40 },
> > +{ CCI_REG8(0x05a0), 0x82 },
> > +{ CCI_REG8(0x05ac), 0x00 },
> > +{ CCI_REG8(0x05ad), 0x01 },
> > +{ CCI_REG8(0x05ae), 0x00 },
> > +{ CCI_REG8(0x0800), 0x0a },
> > +{ CCI_REG8(0x0801), 0x14 },
> > +{ CCI_REG8(0x0802), 0x28 },
> > +{ CCI_REG8(0x0803), 0x34 },
> > +{ CCI_REG8(0x0804), 0x0e },
> > +{ CCI_REG8(0x0805), 0x33 },
> > +{ CCI_REG8(0x0806), 0x03 },
> > +{ CCI_REG8(0x0807), 0x8a },
> > +{ CCI_REG8(0x0808), 0x50 },
> > +{ CCI_REG8(0x0809), 0x00 },
> > +{ CCI_REG8(0x080a), 0x34 },
> > +{ CCI_REG8(0x080b), 0x03 },
> > +{ CCI_REG8(0x080c), 0x26 },
> > +{ CCI_REG8(0x080d), 0x03 },
> > +{ CCI_REG8(0x080e), 0x18 },
> > +{ CCI_REG8(0x080f), 0x03 },
> > +{ CCI_REG8(0x0810), 0x10 },
> > +{ CCI_REG8(0x0811), 0x03 },
> > +{ CCI_REG8(0x0812), 0x00 },
> > +{ CCI_REG8(0x0813), 0x00 },
> > +{ CCI_REG8(0x0814), 0x01 },
> > +{ CCI_REG8(0x0815), 0x00 },
> > +{ CCI_REG8(0x0816), 0x01 },
> > +{ CCI_REG8(0x0817), 0x00 },
> > +{ CCI_REG8(0x0818), 0x00 },
> > +{ CCI_REG8(0x0819), 0x0a },
> > +{ CCI_REG8(0x081a), 0x01 },
> > +{ CCI_REG8(0x081b), 0x6c },
> > +{ CCI_REG8(0x081c), 0x00 },
> > +{ CCI_REG8(0x081d), 0x0b },
> > +{ CCI_REG8(0x081e), 0x02 },
> > +{ CCI_REG8(0x081f), 0x00 },
> > +{ CCI_REG8(0x0820), 0x00 },
> > +{ CCI_REG8(0x0821), 0x0c },
> > +{ CCI_REG8(0x0822), 0x02 },
> > +{ CCI_REG8(0x0823), 0xd9 },
> > +{ CCI_REG8(0x0824), 0x00 },
> > +{ CCI_REG8(0x0825), 0x0d },
> > +{ CCI_REG8(0x0826), 0x03 },
> > +{ CCI_REG8(0x0827), 0xf0 },
> > +{ CCI_REG8(0x0828), 0x00 },
> > +{ CCI_REG8(0x0829), 0x0e },
> > +{ CCI_REG8(0x082a), 0x05 },
> > +{ CCI_REG8(0x082b), 0x94 },
> > +{ CCI_REG8(0x082c), 0x09 },
> > +{ CCI_REG8(0x082d), 0x6e },
> > +{ CCI_REG8(0x082e), 0x07 },
> > +{ CCI_REG8(0x082f), 0xe6 },
> > +{ CCI_REG8(0x0830), 0x10 },
> > +{ CCI_REG8(0x0831), 0x0e },
> > +{ CCI_REG8(0x0832), 0x0b },
> > +{ CCI_REG8(0x0833), 0x2c },
> > +{ CCI_REG8(0x0834), 0x14 },
> > +{ CCI_REG8(0x0835), 0xae },
> > +{ CCI_REG8(0x0836), 0x0f },
> > +{ CCI_REG8(0x0837), 0xc4 },
> > +{ CCI_REG8(0x0838), 0x18 },
> > +{ CCI_REG8(0x0839), 0x0e },
> > +{ CCI_REG8(0x05ac), 0x01 },
> > +{ CCI_REG8(0x059a), 0x00 },
> > +{ CCI_REG8(0x059b), 0x00 },
> > +{ CCI_REG8(0x059c), 0x01 },
> > +{ CCI_REG8(0x0598), 0x00 },
> > +{ CCI_REG8(0x0597), 0x14 },
> > +{ CCI_REG8(0x05ab), 0x09 },
> > +{ CCI_REG8(0x05a4), 0x02 },
> > +{ CCI_REG8(0x05a3), 0x05 },
> > +{ CCI_REG8(0x05a0), 0xc2 },
> > +{ CCI_REG8(0x0207), 0xc4 },
> > +
> > +/* GAIN */
> > +{ CCI_REG8(0x0208), 0x01 },
> > +{ CCI_REG8(0x0209), 0x72 },
> > +{ CCI_REG8(0x0204), 0x04 },
> > +{ CCI_REG8(0x0205), 0x00 },
> > +
> > +{ CCI_REG8(0x0040), 0x22 },
> > +{ CCI_REG8(0x0041), 0x20 },
> > +{ CCI_REG8(0x0043), 0x10 },
> > +{ CCI_REG8(0x0044), 0x00 },
> > +{ CCI_REG8(0x0046), 0x08 },
> > +{ CCI_REG8(0x0047), 0xf0 },
> > +{ CCI_REG8(0x0048), 0x0f },
> > +{ CCI_REG8(0x004b), 0x0f },
> > +{ CCI_REG8(0x004c), 0x00 },
> > +{ CCI_REG8(0x0050), 0x5c },
> > +{ CCI_REG8(0x0051), 0x44 },
> > +{ CCI_REG8(0x005b), 0x03 },
> > +{ CCI_REG8(0x00c0), 0x00 },
> > +{ CCI_REG8(0x00c1), 0x80 },
> > +{ CCI_REG8(0x00c2), 0x31 },
> > +{ CCI_REG8(0x00c3), 0x00 },
> > +{ CCI_REG8(0x0460), 0x04 },
> > +{ CCI_REG8(0x0462), 0x08 },
> > +{ CCI_REG8(0x0464), 0x0e },
> > +{ CCI_REG8(0x0466), 0x0a },
> > +{ CCI_REG8(0x0468), 0x12 },
> > +{ CCI_REG8(0x046a), 0x12 },
> > +{ CCI_REG8(0x046c), 0x10 },
> > +{ CCI_REG8(0x046e), 0x0c },
> > +{ CCI_REG8(0x0461), 0x03 },
> > +{ CCI_REG8(0x0463), 0x03 },
> > +{ CCI_REG8(0x0465), 0x03 },
> > +{ CCI_REG8(0x0467), 0x03 },
> > +{ CCI_REG8(0x0469), 0x04 },
> > +{ CCI_REG8(0x046b), 0x04 },
> > +{ CCI_REG8(0x046d), 0x04 },
> > +{ CCI_REG8(0x046f), 0x04 },
> > +{ CCI_REG8(0x0470), 0x04 },
> > +{ CCI_REG8(0x0472), 0x10 },
> > +{ CCI_REG8(0x0474), 0x26 },
> > +{ CCI_REG8(0x0476), 0x38 },
> > +{ CCI_REG8(0x0478), 0x20 },
> > +{ CCI_REG8(0x047a), 0x30 },
> > +{ CCI_REG8(0x047c), 0x38 },
> > +{ CCI_REG8(0x047e), 0x60 },
> > +{ CCI_REG8(0x0471), 0x05 },
> > +{ CCI_REG8(0x0473), 0x05 },
> > +{ CCI_REG8(0x0475), 0x05 },
> > +{ CCI_REG8(0x0477), 0x05 },
> > +{ CCI_REG8(0x0479), 0x04 },
> > +{ CCI_REG8(0x047b), 0x04 },
> > +{ CCI_REG8(0x047d), 0x04 },
> > +{ CCI_REG8(0x047f), 0x04 },
> > +};
> > +
> > +static const struct gc08a3_link_freq_config link_freq_configs[] =
> {
> 
> Instead of adding such arrays and indices to them, please instead use
> a
> pointer to what corresponds an array entry here. It's easier and less
> error-prone.
> 
fixed in patch:v4.

> > +[GC08A3_LINK_FREQ_336MHZ_INDEX] = {
> > +.reg_list = {
> > +.num_of_regs = ARRAY_SIZE(mode_table_common),
> > +.regs = mode_table_common,
> > +}
> > +},
> > +[GC08A3_LINK_FREQ_207MHZ_INDEX] = {
> > +.reg_list = {
> > +.num_of_regs = ARRAY_SIZE(mode_table_common),
> > +.regs = mode_table_common,
> > +}
> > +},
> > +};
> > +
> > +struct gc08a3_mode {
> > +u32 width;
> > +u32 height;
> > +const struct gc08a3_reg_list reg_list;
> > +
> > +u32 hts; /* Horizontal timining size */
> > +u32 vts_def; /* Default vertical timining size */
> > +u32 vts_min; /* Min vertical timining size */
> > +u32 link_freq_index; /* Link frequency needed for this resolution
> */
> > +u32 max_framerate;
> > +};
> > +
> > +/*
> > + * Declare modes in order, from biggest
> > + * to smallest height.
> > + */
> > +static const struct gc08a3_mode gc08a3_modes[] = {
> > +{
> > +.width = GC08A3_NATIVE_WIDTH,
> > +.height = GC08A3_NATIVE_HEIGHT,
> > +.reg_list = {
> > +.num_of_regs = ARRAY_SIZE(mode_3264x2448),
> > +.regs = mode_3264x2448,
> > +},
> > +.link_freq_index = GC08A3_LINK_FREQ_336MHZ_INDEX,
> 
> This should be a reference to a data structure specific to 366 MHz
> link
> frequency.
> 
fixed in patch:v4.

> > +
> > +.hts = GC08A3_HTS_30FPS,
> > +.vts_def = GC08A3_VTS_30FPS,
> > +.vts_min = GC08A3_VTS_30FPS_MIN,
> > +.max_framerate = 300,
> > +},
> > +{
> > +.width = 1920,
> > +.height = 1080,
> > +.reg_list = {
> > +.num_of_regs = ARRAY_SIZE(mode_1920x1080),
> > +.regs = mode_1920x1080,
> > +},
> > +.link_freq_index = GC08A3_LINK_FREQ_207MHZ_INDEX,
> > +
> > +.hts = GC08A3_HTS_60FPS,
> > +.vts_def = GC08A3_VTS_60FPS,
> > +.vts_min = GC08A3_VTS_60FPS_MIN,
> > +.max_framerate = 600,
> > +},
> > +};
> > +
> > +static u64 to_pixel_rate(u32 f_index)
> > +{
> > +u64 pixel_rate = link_freq_menu_items[f_index] * 2 *
> GC08A3_DATA_LANES;
> > +
> > +do_div(pixel_rate, GC08A3_RGB_DEPTH);
> > +
> > +return pixel_rate;
> > +}
> > +
> > +static int gc08a3_identify_module(struct gc08a3 *gc08a3)
> > +{
> > +struct i2c_client *client = v4l2_get_subdevdata(&gc08a3->sd);
> > +u64 val = 0;
> > +int ret;
> > +
> > +ret = cci_read(gc08a3->regmap, GC08A3_REG_CHIP_ID, &val, NULL);
> > +if (ret) {
> > +dev_err(&client->dev, "failed to read chip id: 0x%x",
> GC08A3_CHIP_ID);
> > +return ret;
> > +}
> > +
> > +if (val != GC08A3_CHIP_ID) {
> > +dev_err(&client->dev, "chip id mismatch: 0x%x!=0x%llx",
> > +GC08A3_CHIP_ID, val);
> > +return -ENXIO;
> > +}
> > +
> > +return 0;
> > +}
> > +
> > +static inline struct gc08a3 *to_gc08a3(struct v4l2_subdev *sd)
> > +{
> > +return container_of(sd, struct gc08a3, sd);
> > +}
> > +
> > +static int gc08a3_power_on(struct device *dev)
> > +{
> > +struct i2c_client *client = to_i2c_client(dev);
> > +struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +struct gc08a3 *gc08a3 = to_gc08a3(sd);
> > +int ret;
> > +
> > +ret = regulator_bulk_enable(GC08A3_NUM_SUPPLIES, gc08a3-
> >supplies);
> > +if (ret < 0) {
> > +dev_err(gc08a3->dev, "failed to enable regulators: %d\n", ret);
> > +return ret;
> > +}
> > +
> > +ret = clk_prepare_enable(gc08a3->xclk);
> > +if (ret < 0) {
> > +regulator_bulk_disable(GC08A3_NUM_SUPPLIES, gc08a3->supplies);
> > +dev_err(gc08a3->dev, "clk prepare enable failed\n");
> > +return ret;
> > +}
> > +
> > +usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
> > +
> > +gpiod_set_value_cansleep(gc08a3->reset_gpio, 1);
> > +usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
> > +
> > +return 0;
> > +}
> > +
> > +static int gc08a3_power_off(struct device *dev)
> > +{
> > +struct i2c_client *client = to_i2c_client(dev);
> > +struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +struct gc08a3 *gc08a3 = to_gc08a3(sd);
> > +
> > +clk_disable_unprepare(gc08a3->xclk);
> > +
> > +usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
> > +
> > +gpiod_set_value_cansleep(gc08a3->reset_gpio, 0);
> > +usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
> > +
> > +regulator_bulk_disable(GC08A3_NUM_SUPPLIES, gc08a3->supplies);
> > +usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US);
> > +
> > +return 0;
> > +}
> > +
> > +static int gc08a3_enum_mbus_code(struct v4l2_subdev *sd,
> > + struct v4l2_subdev_state *sd_state,
> > + struct v4l2_subdev_mbus_code_enum *code)
> > +{
> > +if (code->index > 0)
> > +return -EINVAL;
> > +
> > +code->code = GC08A3_MBUS_CODE;
> > +
> > +return 0;
> > +}
> > +
> > +static int gc08a3_enum_frame_size(struct v4l2_subdev *subdev,
> > +  struct v4l2_subdev_state *sd_state,
> > +  struct v4l2_subdev_frame_size_enum *fse)
> > +{
> > +if (fse->code != GC08A3_MBUS_CODE)
> > +return -EINVAL;
> > +
> > +if (fse->index >= ARRAY_SIZE(gc08a3_modes))
> > +return -EINVAL;
> > +
> > +fse->min_width = gc08a3_modes[fse->index].width;
> > +fse->max_width = gc08a3_modes[fse->index].width;
> > +fse->min_height = gc08a3_modes[fse->index].height;
> > +fse->max_height = gc08a3_modes[fse->index].height;
> > +
> > +return 0;
> > +}
> > +
> > +static int gc08a3_update_cur_mode_controls(struct gc08a3 *gc08a3,
> const struct gc08a3_mode *mode)
> > +{
> > +s64 exposure_max, h_blank;
> > +int ret = 0;
> > +
> > +ret = __v4l2_ctrl_modify_range(gc08a3->vblank,
> > +       mode->vts_min - mode->height,
> > +       GC08A3_VTS_MAX - mode->height, 1,
> > +       mode->vts_def - mode->height);
> > +if (ret)
> > +dev_err(gc08a3->dev, "VB ctrl range update failed\n");
> > +
> > +h_blank = mode->hts - mode->width;
> > +ret = __v4l2_ctrl_modify_range(gc08a3->hblank, h_blank, h_blank,
> 1,
> > +       h_blank);
> > +if (ret)
> > +dev_err(gc08a3->dev, "HB ctrl range update failed\n");
> > +
> > +exposure_max = mode->vts_def - GC08A3_EXP_MARGIN;
> > +ret = __v4l2_ctrl_modify_range(gc08a3->exposure, GC08A3_EXP_MIN,
> > +       exposure_max, GC08A3_EXP_STEP,
> > +       exposure_max);
> > +if (ret)
> > +dev_err(gc08a3->dev, "exposure ctrl range update failed\n");
> > +
> > +return ret;
> > +}
> > +
> > +static void gc08a3_update_pad_format(struct gc08a3 *gc08a3,
> > +     const struct gc08a3_mode *mode,
> > +     struct v4l2_mbus_framefmt *fmt)
> > +{
> > +fmt->width = mode->width;
> > +fmt->height = mode->height;
> > +fmt->code = GC08A3_MBUS_CODE;
> > +fmt->field = V4L2_FIELD_NONE;
> > +fmt->colorspace = V4L2_COLORSPACE_SRGB;
> > +fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
> > +fmt->quantization =
> > +V4L2_MAP_QUANTIZATION_DEFAULT(true, fmt->colorspace, fmt-
> >ycbcr_enc);
> > +fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
> > +}
> > +
> > +static int gc08a3_set_format(struct v4l2_subdev *sd,
> > +     struct v4l2_subdev_state *state,
> > +     struct v4l2_subdev_format *fmt)
> > +{
> > +struct gc08a3 *gc08a3 = to_gc08a3(sd);
> > +struct v4l2_mbus_framefmt *mbus_fmt;
> > +struct v4l2_rect *crop;
> > +const struct gc08a3_mode *mode;
> > +
> > +mode = v4l2_find_nearest_size(gc08a3_modes,
> ARRAY_SIZE(gc08a3_modes),
> > +      width, height, fmt->format.width,
> > +      fmt->format.height);
> > +
> > +/*update crop info to subdev state*/
> > +crop = v4l2_subdev_state_get_crop(state, 0);
> > +crop->width = mode->width;
> > +crop->height = mode->height;
> > +
> > +/*update fmt info to subdev state*/
> > +gc08a3_update_pad_format(gc08a3, mode, &fmt->format);
> > +mbus_fmt = v4l2_subdev_state_get_format(state, 0);
> > +*mbus_fmt = fmt->format;
> > +
> > +if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
> > +return 0;
> > +
> > +gc08a3->cur_mode = mode;
> > +gc08a3_update_cur_mode_controls(gc08a3, mode);
> > +
> > +return 0;
> > +}
> > +
> > +static int gc08a3_get_selection(struct v4l2_subdev *sd,
> > +struct v4l2_subdev_state *state,
> > +struct v4l2_subdev_selection *sel)
> > +{
> > +struct gc08a3 *gc08a3 = to_gc08a3(sd);
> > +
> > +switch (sel->target) {
> > +case V4L2_SEL_TGT_CROP:
> > +sel->r = *v4l2_subdev_state_get_crop(state, 0);
> > +break;
> > +case V4L2_SEL_TGT_CROP_BOUNDS:
> > +sel->r.top = 0;
> > +sel->r.left = 0;
> > +sel->r.width = GC08A3_NATIVE_WIDTH;
> > +sel->r.height = GC08A3_NATIVE_HEIGHT;
> > +break;
> > +case V4L2_SEL_TGT_CROP_DEFAULT:
> > +if (gc08a3->cur_mode->width == GC08A3_NATIVE_WIDTH) {
> > +sel->r.top = 0;
> > +sel->r.left = 0;
> > +sel->r.width = GC08A3_NATIVE_WIDTH;
> > +sel->r.height = GC08A3_NATIVE_HEIGHT;
> 
> Couuld you obtain these from the mode?
> 
fixed in patch:v4.

> > +} else {
> > +sel->r.top = 0;
> > +sel->r.left = 0;
> > +sel->r.width = 1920;
> > +sel->r.height = 1080;
> 
> This, too?
> 
fixed in patch:v4.

> > +}
> > +break;
> > +default:
> > +return -EINVAL;
> > +}
> > +
> > +return 0;
> > +}
> > +
> > +static int gc08a3_init_state(struct v4l2_subdev *sd,
> > +     struct v4l2_subdev_state *state)
> > +{
> > +struct v4l2_subdev_format fmt = {
> > +.which = V4L2_SUBDEV_FORMAT_TRY,
> > +.pad = 0,
> > +.format = {
> > +.code = GC08A3_MBUS_CODE,
> > +.width = gc08a3_modes[0].width,
> > +.height = gc08a3_modes[0].height,
> > +},
> > +};
> > +
> > +gc08a3_set_format(sd, state, &fmt);
> > +
> > +return 0;
> > +}
> > +
> > +static int gc08a3_set_ctrl_hflip(struct gc08a3 *gc08a3, u32
> ctrl_val)
> > +{
> > +int ret;
> > +u64 val;
> > +
> > +ret = cci_read(gc08a3->regmap, GC08A3_FLIP_REG, &val, NULL);
> > +if (ret) {
> > +dev_err(gc08a3->dev, "read hflip register failed: %d\n", ret);
> > +return ret;
> > +}
> > +
> > +val = ctrl_val ? (val | GC08A3_FLIP_H_MASK) :
> > +   (val & ~GC08A3_FLIP_H_MASK);
> > +ret = cci_write(gc08a3->regmap, GC08A3_FLIP_REG, val, NULL);
> > +if (ret < 0)
> > +dev_err(gc08a3->dev, "Error %d\n", ret);
> > +
> > +return ret;
> > +}
> > +
> > +static int gc08a3_set_ctrl_vflip(struct gc08a3 *gc08a3, u32
> ctrl_val)
> > +{
> > +int ret;
> > +u64 val;
> > +
> > +ret = cci_read(gc08a3->regmap, GC08A3_FLIP_REG, &val, NULL);
> > +if (ret) {
> > +dev_err(gc08a3->dev, "read vflip register failed: %d\n", ret);
> > +return ret;
> > +}
> > +
> > +val = ctrl_val ? (val | GC08A3_FLIP_V_MASK) :
> > +   (val & ~GC08A3_FLIP_V_MASK);
> > +ret = cci_write(gc08a3->regmap, GC08A3_FLIP_REG, val, NULL);
> > +if (ret < 0)
> > +dev_err(gc08a3->dev, "Error %d\n", ret);
> > +
> > +return ret;
> > +}
> > +
> > +static int gc08a3_test_pattern(struct gc08a3 *gc08a3, u32
> pattern_menu)
> > +{
> > +int ret = 0;
> 
> Please declare ret as last. Elsewhere, too.
> 
fixed in patch:v4.

> > +u32 pattern = 0;
> > +
> > +if (pattern_menu) {
> > +switch (pattern_menu) {
> > +case 1:
> > +pattern = 0x00;
> > +break;
> > +case 2:
> > +pattern = 0x10;
> > +break;
> > +case 3:
> > +case 4:
> > +case 5:
> > +case 6:
> > +case 7:
> > +pattern = pattern_menu + 1;
> > +break;
> > +}
> > +
> > +ret = cci_write(gc08a3->regmap, GC08A3_REG_TEST_PATTERN_EN,
> > +GC08A3_TEST_PATTERN_EN, NULL);
> > +if (ret) {
> > +dev_err(gc08a3->dev, "test pattern enable failed: %d\n", ret);
> 
> I'm not sure how useful these separate debug prints are. Error
> handling
> could be simplified without them nonetheless.
> 
fixed in patch:v4.

> > +return ret;
> > +}
> > +
> > +ret = cci_write(gc08a3->regmap, GC08A3_REG_TEST_PATTERN_IDX,
> > +pattern, NULL);
> > +if (ret < 0)
> > +dev_err(gc08a3->dev, "Error %d\n", ret);
> > +
> > +} else {
> > +ret = cci_write(gc08a3->regmap, GC08A3_REG_TEST_PATTERN_EN,
> > +0x00, NULL);
> > +if (ret < 0)
> > +dev_err(gc08a3->dev, "test pattern disable failed: %d\n", ret);
> > +}
> > +
> > +return ret;
> > +}
> > +
> > +static int gc08a3_set_ctrl(struct v4l2_ctrl *ctrl)
> > +{
> > +struct gc08a3 *gc08a3 =
> > +container_of(ctrl->handler, struct gc08a3, ctrls);
> > +int ret = 0;
> > +s64 exposure_max;
> > +
> > +if (ctrl->id == V4L2_CID_VBLANK) {
> > +/* Update max exposure while meeting expected vblanking */
> > +exposure_max = gc08a3->cur_mode->height + ctrl->val -
> > +       GC08A3_EXP_MARGIN;
> > +__v4l2_ctrl_modify_range(gc08a3->exposure,
> > + gc08a3->exposure->minimum,
> > + exposure_max, gc08a3->exposure->step,
> > + exposure_max);
> > +}
> > +
> > +/*
> > + * Applying V4L2 control value only happens
> > + * when power is on for streaming
> > + */
> > +if (!pm_runtime_get_if_in_use(gc08a3->dev))
> > +return 0;
> > +
> > +switch (ctrl->id) {
> > +case V4L2_CID_EXPOSURE:
> > +ret = cci_write(gc08a3->regmap, GC08A3_EXP_REG, ctrl->val, NULL);
> > +break;
> > +
> > +case V4L2_CID_ANALOGUE_GAIN:
> > +ret = cci_write(gc08a3->regmap, GC08A3_AGAIN_REG, ctrl->val,
> NULL);
> 
> Please run:
> 
> ./scripts/checkpatch.pl --strict --max-line-length=80
> 
fixed in patch:v4.

> > +break;
> > +
> > +case V4L2_CID_VBLANK:
> > +ret = cci_write(gc08a3->regmap, GC08A3_FRAME_LENGTH_REG,
> > +gc08a3->cur_mode->height + ctrl->val, NULL);
> > +break;
> > +
> > +case V4L2_CID_HFLIP:
> > +ret = gc08a3_set_ctrl_hflip(gc08a3, ctrl->val);
> > +break;
> > +
> > +case V4L2_CID_VFLIP:
> > +ret = gc08a3_set_ctrl_vflip(gc08a3, ctrl->val);
> > +break;
> > +
> > +case V4L2_CID_TEST_PATTERN:
> > +ret = gc08a3_test_pattern(gc08a3, ctrl->val);
> > +break;
> > +
> > +default:
> > +break;
> > +}
> > +
> > +pm_runtime_put(gc08a3->dev);
> > +
> > +return ret;
> > +}
> > +
> > +static const struct v4l2_ctrl_ops gc08a3_ctrl_ops = {
> > +.s_ctrl = gc08a3_set_ctrl,
> > +};
> > +
> > +static int gc08a3_start_streaming(struct gc08a3 *gc08a3)
> > +{
> > +const struct gc08a3_mode *mode;
> > +const struct gc08a3_reg_list *reg_list;
> > +int link_freq_index;
> > +int ret;
> > +
> > +ret = pm_runtime_resume_and_get(gc08a3->dev);
> > +if (ret < 0)
> > +return ret;
> > +
> > +link_freq_index = gc08a3->cur_mode->link_freq_index;
> > +
> > +reg_list = &link_freq_configs[link_freq_index].reg_list;
> > +ret = cci_multi_reg_write(gc08a3->regmap,
> > +  reg_list->regs, reg_list->num_of_regs, NULL);
> > +if (ret) {
> > +dev_err(gc08a3->dev, "could not sent common table %d\n", ret);
> > +goto err_rpm_put;
> > +}
> > +
> > +mode = gc08a3->cur_mode;
> > +reg_list = &mode->reg_list;
> > +ret = cci_multi_reg_write(gc08a3->regmap,
> > +  reg_list->regs, reg_list->num_of_regs, NULL);
> > +if (ret < 0) {
> > +dev_err(gc08a3->dev, "could not sent mode table %d\n", ret);
> > +goto err_rpm_put;
> > +}
> > +
> > +ret = __v4l2_ctrl_handler_setup(&gc08a3->ctrls);
> > +if (ret < 0) {
> > +dev_err(gc08a3->dev, "could not sync v4l2 controls\n");
> > +goto err_rpm_put;
> > +}
> > +
> > +ret = cci_write(gc08a3->regmap, GC08A3_STRAEMING_REG, 1, NULL);
> > +if (ret < 0) {
> > +dev_err(gc08a3->dev, "write STRAEMING_REG failed: %d\n", ret);
> > +goto err_rpm_put;
> > +}
> > +
> > +return 0;
> > +
> > +err_rpm_put:
> > +pm_runtime_put(gc08a3->dev);
> > +return ret;
> > +}
> > +
> > +static int gc08a3_stop_streaming(struct gc08a3 *gc08a3)
> > +{
> > +int ret;
> > +
> > +ret = cci_write(gc08a3->regmap, GC08A3_STRAEMING_REG, 0, NULL);
> > +if (ret < 0)
> > +dev_err(gc08a3->dev, "could not sent stop streaming %d\n", ret);
> > +
> > +pm_runtime_put(gc08a3->dev);
> > +return ret;
> > +}
> > +
> > +static int gc08a3_s_stream(struct v4l2_subdev *subdev, int enable)
> > +{
> > +struct gc08a3 *gc08a3 = to_gc08a3(subdev);
> > +struct v4l2_subdev_state *state;
> > +int ret;
> > +
> > +state = v4l2_subdev_lock_and_get_active_state(subdev);
> > +
> > +if (enable)
> > +ret = gc08a3_start_streaming(gc08a3);
> > +else
> > +ret = gc08a3_stop_streaming(gc08a3);
> > +
> > +gc08a3->streaming = enable;
> > +v4l2_subdev_unlock_state(state);
> > +
> > +return ret;
> > +}
> > +
> > +static int gc08a3_g_mbus_config(struct v4l2_subdev *sd, unsigned
> int pad,
> > +struct v4l2_mbus_config *config)
> > +{
> > +config->type = V4L2_MBUS_CSI2_DPHY;
> > +config->bus.mipi_csi2.num_data_lanes = 4;
> > +config->bus.mipi_csi2.flags = 0;
> > +return 0;
> 
> Please drop this, the downstream sub-device can obtain the
> configuration
> from the endpoint.
> 
fixed in patch:v4.

> > +}
> > +
> > +static int gc08a3_enum_frame_interval(struct v4l2_subdev *subdev,
> > +      struct v4l2_subdev_state *sd_state,
> > +      struct v4l2_subdev_frame_interval_enum *fie)
> > +{
> > +unsigned int index = fie->index;
> > +unsigned int i;
> > +
> > +for (i = 0; i < ARRAY_SIZE(gc08a3_modes); i++) {
> > +if (fie->width != gc08a3_modes[i].width ||
> > +    fie->height != gc08a3_modes[i].height)
> > +continue;
> > +
> > +if (index-- == 0) {
> > +fie->interval.numerator = 1;
> > +fie->interval.denominator = gc08a3_modes[i].max_framerate / 10;
> > +return 0;
> > +}
> > +}
> > +
> > +return -EINVAL;
> > +}
> > +
> > +static const struct v4l2_subdev_video_ops gc08a3_video_ops = {
> > +.s_stream = gc08a3_s_stream,
> > +};
> > +
> > +static const struct v4l2_subdev_pad_ops gc08a3_subdev_pad_ops = {
> > +.enum_mbus_code = gc08a3_enum_mbus_code,
> > +.enum_frame_size = gc08a3_enum_frame_size,
> > +.enum_frame_interval = gc08a3_enum_frame_interval,
> > +.get_fmt = v4l2_subdev_get_fmt,
> > +.set_fmt = gc08a3_set_format,
> > +.get_selection = gc08a3_get_selection,
> > +.get_mbus_config = gc08a3_g_mbus_config,
> > +};
> > +
> > +static const struct v4l2_subdev_core_ops gc08a3_core_ops = {
> > +.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> > +.unsubscribe_event = v4l2_event_subdev_unsubscribe,
> > +};
> > +
> > +static const struct v4l2_subdev_ops gc08a3_subdev_ops = {
> > +.core = &gc08a3_core_ops,
> > +.video = &gc08a3_video_ops,
> > +.pad = &gc08a3_subdev_pad_ops,
> > +};
> > +
> > +static const struct v4l2_subdev_internal_ops gc08a3_internal_ops =
> {
> > +.init_state = gc08a3_init_state,
> > +};
> > +
> > +static int gc08a3_get_regulators(struct device *dev, struct gc08a3
> *gc08a3)
> > +{
> > +unsigned int i;
> > +
> > +for (i = 0; i < GC08A3_NUM_SUPPLIES; i++)
> > +gc08a3->supplies[i].supply = gc08a3_supply_name[i];
> > +
> > +return devm_regulator_bulk_get(dev, GC08A3_NUM_SUPPLIES,
> > +       gc08a3->supplies);
> > +}
> > +
> > +static int gc08a3_parse_fwnode(struct device *dev)
> > +{
> > +struct fwnode_handle *endpoint;
> > +struct v4l2_fwnode_endpoint bus_cfg = {
> > +.bus_type = V4L2_MBUS_CSI2_DPHY,
> > +};
> > +unsigned int i, j;
> > +int ret;
> > +
> > +endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
> > +if (!endpoint) {
> > +dev_err(dev, "endpoint node not found\n");
> > +return -EINVAL;
> > +}
> > +
> > +ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
> > +if (ret) {
> > +dev_err(dev, "parsing endpoint node failed\n");
> > +goto done;
> > +}
> > +
> > +if (!bus_cfg.nr_of_link_frequencies) {
> > +dev_err(dev, "no link frequencies defined");
> > +ret = -EINVAL;
> > +goto done;
> > +}
> > +
> > +for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
> > +for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
> > +if (link_freq_menu_items[i] ==
> > +    bus_cfg.link_frequencies[j])
> > +break;
> > +}
> > +
> > +if (j == bus_cfg.nr_of_link_frequencies) {
> > +dev_err(dev,
> > +"no link frequency %lld supported, please check DT",
> > +link_freq_menu_items[i]);
> > +ret = -EINVAL;
> > +goto done;
> > +}
> > +}
> 
> Please use v4l2_link_freq_to_bitmap() available here
> <URL:
> https://lore.kernel.org/linux-media/20240108151805.55584-2-sakari.ailus@linux.intel.com/T/#u>
> ;.
> We'll then merge both at the same time.
> 
fixed in patch:v4.

> > +
> > +done:
> > +v4l2_fwnode_endpoint_free(&bus_cfg);
> > +fwnode_handle_put(endpoint);
> > +return ret;
> > +}
> > +
> > +static int gc08a3_init_controls(struct gc08a3 *gc08a3)
> > +{
> > +struct i2c_client *client = v4l2_get_subdevdata(&gc08a3->sd);
> > +const struct gc08a3_mode *mode = &gc08a3_modes[0];
> > +const struct v4l2_ctrl_ops *ops = &gc08a3_ctrl_ops;
> > +struct v4l2_fwnode_device_properties props;
> > +struct v4l2_ctrl_handler *ctrl_hdlr;
> > +s64 exposure_max, h_blank;
> > +int ret;
> > +
> > +ctrl_hdlr = &gc08a3->ctrls;
> > +ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
> > +if (ret)
> > +return ret;
> > +
> > +gc08a3->link_freq =
> > +v4l2_ctrl_new_int_menu(ctrl_hdlr,
> > +       &gc08a3_ctrl_ops,
> > +       V4L2_CID_LINK_FREQ,
> > +       ARRAY_SIZE(link_freq_menu_items) - 1,
> > +       0, link_freq_menu_items);
> > +if (gc08a3->link_freq)
> > +gc08a3->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> > +
> > +gc08a3->pixel_rate =
> > +v4l2_ctrl_new_std(ctrl_hdlr,
> > +  &gc08a3_ctrl_ops,
> > +  V4L2_CID_PIXEL_RATE, 0,
> > +  to_pixel_rate(GC08A3_LINK_FREQ_336MHZ_INDEX), 1,
> > +  to_pixel_rate(GC08A3_LINK_FREQ_336MHZ_INDEX));
> > +
> > +gc08a3->vblank =
> > +v4l2_ctrl_new_std(ctrl_hdlr,
> > +  &gc08a3_ctrl_ops, V4L2_CID_VBLANK,
> > +  mode->vts_min - mode->height,
> > +  GC08A3_VTS_MAX - mode->height, 1,
> > +  mode->vts_def - mode->height);
> > +
> > +h_blank = mode->hts - mode->width;
> > +gc08a3->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops,
> > +   V4L2_CID_HBLANK, h_blank, h_blank, 1,
> > +   h_blank);
> > +if (gc08a3->hblank)
> > +gc08a3->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> > +
> > +v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops,
> > +  V4L2_CID_ANALOGUE_GAIN, GC08A3_AGAIN_MIN,
> > +  GC08A3_AGAIN_MAX, GC08A3_AGAIN_STEP,
> > +  GC08A3_AGAIN_MIN);
> > +
> > +exposure_max = mode->vts_def - GC08A3_EXP_MARGIN;
> > +gc08a3->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops,
> > +     V4L2_CID_EXPOSURE, GC08A3_EXP_MIN,
> > +     exposure_max, GC08A3_EXP_STEP,
> > +     exposure_max);
> > +
> > +v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &gc08a3_ctrl_ops,
> > +     V4L2_CID_TEST_PATTERN,
> > +     ARRAY_SIZE(gc08a3_test_pattern_menu) - 1,
> > +     0, 0, gc08a3_test_pattern_menu);
> > +
> > +v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops, V4L2_CID_HFLIP, 0,
> > +  1, 1, 0);
> > +
> > +v4l2_ctrl_new_std(ctrl_hdlr, &gc08a3_ctrl_ops, V4L2_CID_VFLIP, 0,
> > +  1, 1, 0);
> > +
> > +/* register properties to fwnode (e.g. rotation, orientation) */
> > +ret = v4l2_fwnode_device_parse(&client->dev, &props);
> > +if (ret)
> > +goto error_ctrls;
> > +
> > +ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, ops, &props);
> > +if (ret)
> > +goto error_ctrls;
> > +
> > +if (ctrl_hdlr->error) {
> > +ret = ctrl_hdlr->error;
> > +goto error_ctrls;
> > +}
> > +
> > +gc08a3->sd.ctrl_handler = ctrl_hdlr;
> > +
> > +return 0;
> > +
> > +error_ctrls:
> > +v4l2_ctrl_handler_free(ctrl_hdlr);
> > +
> > +return ret;
> > +}
> > +
> > +static int gc08a3_probe(struct i2c_client *client)
> > +{
> > +struct device *dev = &client->dev;
> > +struct gc08a3 *gc08a3;
> > +int ret;
> > +
> > +ret = gc08a3_parse_fwnode(dev);
> > +if (ret)
> > +return ret;
> > +
> > +gc08a3 = devm_kzalloc(dev, sizeof(*gc08a3), GFP_KERNEL);
> > +if (!gc08a3)
> > +return -ENOMEM;
> > +
> > +gc08a3->dev = dev;
> > +
> > +gc08a3->regmap = devm_cci_regmap_init_i2c(client, 16);
> > +if (IS_ERR(gc08a3->regmap))
> > +return dev_err_probe(dev, PTR_ERR(gc08a3->regmap),
> > +     "failed to init CCI\n");
> > +
> > +gc08a3->xclk = devm_clk_get(dev, NULL);
> > +if (IS_ERR(gc08a3->xclk))
> > +return dev_err_probe(dev, PTR_ERR(gc08a3->xclk),
> > +     "failed to get xclk\n");
> > +
> > +ret = clk_set_rate(gc08a3->xclk, GC08A3_DEFAULT_CLK_FREQ);
> > +if (ret)
> > +return dev_err_probe(dev, ret,
> > +     "failed to set xclk frequency\n");
> > +
> > +ret = gc08a3_get_regulators(dev, gc08a3);
> > +if (ret < 0)
> > +return dev_err_probe(dev, ret,
> > +     "failed to get regulators\n");
> > +
> > +gc08a3->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
> > +if (IS_ERR(gc08a3->reset_gpio))
> > +return dev_err_probe(dev, PTR_ERR(gc08a3->reset_gpio),
> > +     "failed to get gpio\n");
> > +
> > +v4l2_i2c_subdev_init(&gc08a3->sd, client, &gc08a3_subdev_ops);
> > +gc08a3->sd.internal_ops = &gc08a3_internal_ops;
> > +gc08a3->cur_mode = &gc08a3_modes[0];
> > +
> > +ret = gc08a3_power_on(gc08a3->dev);
> > +if (ret)
> > +return dev_err_probe(dev, ret,
> > +     "failed to sensor power on\n");
> > +
> > +ret = gc08a3_identify_module(gc08a3);
> > +if (ret) {
> > +dev_err(&client->dev, "failed to find sensor: %d\n", ret);
> > +goto err_power_off;
> > +}
> > +
> > +ret = gc08a3_init_controls(gc08a3);
> > +if (ret) {
> > +dev_err(&client->dev, "failed to init controls: %d", ret);
> > +goto err_power_off;
> > +}
> > +
> > +gc08a3->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
> V4L2_SUBDEV_FL_HAS_EVENTS;
> > +gc08a3->pad.flags = MEDIA_PAD_FL_SOURCE;
> > +gc08a3->sd.dev = &client->dev;
> > +gc08a3->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> > +
> > +ret = media_entity_pads_init(&gc08a3->sd.entity, 1, &gc08a3->pad);
> > +if (ret < 0) {
> > +dev_err(dev, "could not register media entity\n");
> > +goto err_v4l2_ctrl_handler_free;
> > +}
> > +
> > +gc08a3->sd.state_lock = gc08a3->ctrls.lock;
> > +ret = v4l2_subdev_init_finalize(&gc08a3->sd);
> > +if (ret < 0) {
> > +dev_err(dev, "v4l2 subdev init error: %d\n", ret);
> > +goto err_media_entity_cleanup;
> > +}
> > +
> > +ret = v4l2_async_register_subdev_sensor(&gc08a3->sd);
> > +if (ret < 0) {
> > +dev_err(dev, "could not register v4l2 device\n");
> > +goto err_subdev_cleanup;
> > +}
> > +
> > +pm_runtime_set_active(gc08a3->dev);
> > +pm_runtime_enable(gc08a3->dev);
> > +pm_runtime_idle(gc08a3->dev);
> 
> You'll need to enable runtime PM before registering the sub-device,
> please
> move all these calls before v4l2_async_register_subdev_sensor().
> 
fixed in patch:v4.

> > +
> > +return 0;
> > +
> > +err_subdev_cleanup:
> > +v4l2_subdev_cleanup(&gc08a3->sd);
> > +
> > +err_media_entity_cleanup:
> > +media_entity_cleanup(&gc08a3->sd.entity);
> > +
> > +err_v4l2_ctrl_handler_free:
> > +v4l2_ctrl_handler_free(gc08a3->sd.ctrl_handler);
> > +
> > +err_power_off:
> > +gc08a3_power_off(gc08a3->dev);
> > +
> > +return ret;
> > +}
> > +
> > +static void gc08a3_remove(struct i2c_client *client)
> > +{
> > +struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +struct gc08a3 *gc08a3 = to_gc08a3(sd);
> > +
> > +v4l2_async_unregister_subdev(&gc08a3->sd);
> > +v4l2_subdev_cleanup(sd);
> > +media_entity_cleanup(&gc08a3->sd.entity);
> > +v4l2_ctrl_handler_free(&gc08a3->ctrls);
> > +
> > +pm_runtime_disable(&client->dev);
> > +if (!pm_runtime_status_suspended(&client->dev))
> > +gc08a3_power_off(gc08a3->dev);
> > +pm_runtime_set_suspended(&client->dev);
> > +}
> > +
> > +static const struct of_device_id gc08a3_of_match[] = {
> > +{ .compatible = "galaxycore,gc08a3" },
> > +{}
> > +};
> > +MODULE_DEVICE_TABLE(of, gc08a3_of_match);
> > +
> > +static const struct dev_pm_ops gc08a3_pm_ops = {
> > +SET_RUNTIME_PM_OPS(gc08a3_power_off, gc08a3_power_on, NULL)
> > +};
> > +
> > +static struct i2c_driver gc08a3_i2c_driver = {
> > +.driver = {
> > +.of_match_table = gc08a3_of_match,
> > +.pm = &gc08a3_pm_ops,
> > +.name  = "gc08a3",
> > +},
> > +.probe  = gc08a3_probe,
> > +.remove = gc08a3_remove,
> > +};
> > +
> > +module_i2c_driver(gc08a3_i2c_driver);
> > +
> > +MODULE_DESCRIPTION("GalaxyCore gc08a3 Camera driver");
> > +MODULE_AUTHOR("Zhi Mao <zhi.mao@mediatek.com>");
> > +MODULE_LICENSE("GPL");
> 
> -- 
> Regards,
> 
> Sakari Ailus