Re: [PATCH v3 2/2] media: i2c: Add driver for IMX519 sensor

[Umang Jain <umang.jain@xxxxxxxxxxxxxxxx>]

Hi all,

Rectification on my earlier comment,

On 11/28/22 12:29 PM, Umang Jain wrote:
> Hi Lee,
>
> On 11/16/22 6:48 AM, lee wrote:
> > Adds a driver for the 16MPix IMX519 CSI2 sensor.
> > Whilst the sensor supports 2 or 4 CSI2 data lanes, this driver
> > currently only supports 2 lanes.
> >
> > The following Bayer modes are currently available:
> >
> > 4656x3496 10-bit @ 10fps
> > 3840x2160 10-bit (cropped) @ 21fps
> > 2328x1748 10-bit (binned) @ 30fps
> > 1920x1080 10-bit (cropped/binned) @ 60fps
> > 1280x720 10-bit (cropped/binned) @ 120fps
> >
> > Signed-off-by: Lee <lee@xxxxxxxxxxx>
> > ---
> >   MAINTAINERS                |    1 +
> >   drivers/media/i2c/Kconfig  |   13 +
> >   drivers/media/i2c/Makefile |    1 +
> >   drivers/media/i2c/imx519.c | 2022 ++++++++++++++++++++++++++++++++++++
> >   4 files changed, 2037 insertions(+)
> >   create mode 100644 drivers/media/i2c/imx519.c
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 1fe906632209..1a9134b6b85d 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -19239,6 +19239,7 @@ L:    linux-media@xxxxxxxxxxxxxxx
> >   S:    Maintained
> >   T:    git git://linuxtv.org/media_tree.git
> >   F: Documentation/devicetree/bindings/media/i2c/sony,imx519.yaml
> > +F:    drivers/media/i2c/imx519.c
> >     SONY MEMORYSTICK SUBSYSTEM
> >   M:    Maxim Levitsky <maximlevitsky@xxxxxxxxx>
> > diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> > index 7806d4b81716..f7f55099552c 100644
> > --- a/drivers/media/i2c/Kconfig
> > +++ b/drivers/media/i2c/Kconfig
> > @@ -228,6 +228,19 @@ config VIDEO_IMX412
> >         To compile this driver as a module, choose M here: the
> >         module will be called imx412.
> >   +config VIDEO_IMX519
> > +    tristate "Sony IMX519 sensor support"
> > +    depends on I2C && VIDEO_DEV
> > +    select MEDIA_CONTROLLER
> > +    select VIDEO_V4L2_SUBDEV_API
> > +    select V4L2_FWNODE
> > +    help
> > +      This is a Video4Linux2 sensor driver for the Sony
> > +      IMX519 camera.
> > +
> > +      To compile this driver as a module, choose M here: the
> > +      module will be called IMX519.
> > +
> >   config VIDEO_MAX9271_LIB
> >       tristate
> >   diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> > index 0a2933103dd9..26d1ec51e88b 100644
> > --- a/drivers/media/i2c/Makefile
> > +++ b/drivers/media/i2c/Makefile
> > @@ -48,6 +48,7 @@ obj-$(CONFIG_VIDEO_IMX334) += imx334.o
> >   obj-$(CONFIG_VIDEO_IMX335) += imx335.o
> >   obj-$(CONFIG_VIDEO_IMX355) += imx355.o
> >   obj-$(CONFIG_VIDEO_IMX412) += imx412.o
> > +obj-$(CONFIG_VIDEO_IMX519) += imx519.o
> >   obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o
> >   obj-$(CONFIG_VIDEO_ISL7998X) += isl7998x.o
> >   obj-$(CONFIG_VIDEO_KS0127) += ks0127.o
> > diff --git a/drivers/media/i2c/imx519.c b/drivers/media/i2c/imx519.c
> > new file mode 100644
> > index 000000000000..0c68c456e48f
> > --- /dev/null
> > +++ b/drivers/media/i2c/imx519.c
> > @@ -0,0 +1,2022 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * A V4L2 driver for Sony IMX519 cameras.
> > + * Copyright (C) 2022 Arducam Technology co., Ltd.
> > + *
> > + * Based on Sony IMX477 camera driver
> > + * Copyright (C) 2020 Raspberry Pi (Trading) Ltd
> > + */
> > +#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/of_device.h>
> > +#include <linux/pm_runtime.h>
> > +#include <linux/regulator/consumer.h>
> > +#include <media/v4l2-ctrls.h>
> > +#include <media/v4l2-device.h>
> > +#include <media/v4l2-event.h>
> > +#include <media/v4l2-fwnode.h>
> > +#include <media/v4l2-mediabus.h>
> > +
> > +#define IMX519_REG_VALUE_08BIT        1
> > +#define IMX519_REG_VALUE_16BIT        2
> > +
> > +/* Chip ID */
> > +#define IMX519_REG_CHIP_ID        0x0016
> > +#define IMX519_CHIP_ID            0x0519
> > +
> > +#define IMX519_REG_MODE_SELECT        0x0100
> > +#define IMX519_MODE_STANDBY        0x00
> > +#define IMX519_MODE_STREAMING        0x01
> > +
> > +#define IMX519_REG_ORIENTATION        0x101
> > +
> > +#define IMX519_XCLK_FREQ        24000000
> > +
> > +#define IMX519_DEFAULT_LINK_FREQ    493500000
> > +
> > +/* Pixel rate is fixed at 686MHz for all the modes */
> > +#define IMX519_PIXEL_RATE        686000000
> > +
> > +/* V_TIMING internal */
> > +#define IMX519_REG_FRAME_LENGTH        0x0340
> > +#define IMX519_FRAME_LENGTH_MAX        0xffdc
> > +
> > +/* Long exposure multiplier */
> > +#define IMX519_LONG_EXP_SHIFT_MAX    7
> > +#define IMX519_LONG_EXP_SHIFT_REG    0x3100
> > +
> > +/* Exposure control */
> > +#define IMX519_REG_EXPOSURE        0x0202
> > +#define IMX519_EXPOSURE_OFFSET        32
> > +#define IMX519_EXPOSURE_MIN        20
> > +#define IMX519_EXPOSURE_STEP        1
> > +#define IMX519_EXPOSURE_DEFAULT        0x3e8
> > +#define IMX519_EXPOSURE_MAX        (IMX519_FRAME_LENGTH_MAX - \
> > +                     IMX519_EXPOSURE_OFFSET)
> > +
> > +/* Analog gain control */
> > +#define IMX519_REG_ANALOG_GAIN        0x0204
> > +#define IMX519_ANA_GAIN_MIN        0
> > +#define IMX519_ANA_GAIN_MAX        960
> > +#define IMX519_ANA_GAIN_STEP        1
> > +#define IMX519_ANA_GAIN_DEFAULT        0x0
> > +
> > +/* Digital gain control */
> > +#define IMX519_REG_DIGITAL_GAIN        0x020e
> > +#define IMX519_DGTL_GAIN_MIN        0x0100
> > +#define IMX519_DGTL_GAIN_MAX        0xffff
> > +#define IMX519_DGTL_GAIN_DEFAULT    0x0100
> > +#define IMX519_DGTL_GAIN_STEP        1
> > +
> > +/* Test Pattern Control */
> > +#define IMX519_REG_TEST_PATTERN        0x0600
> > +#define IMX519_TEST_PATTERN_DISABLE    0
> > +#define IMX519_TEST_PATTERN_SOLID_COLOR    1
> > +#define IMX519_TEST_PATTERN_COLOR_BARS    2
> > +#define IMX519_TEST_PATTERN_GREY_COLOR    3
> > +#define IMX519_TEST_PATTERN_PN9        4
> > +
> > +/* Test pattern colour components */
> > +#define IMX519_REG_TEST_PATTERN_R    0x0602
> > +#define IMX519_REG_TEST_PATTERN_GR    0x0604
> > +#define IMX519_REG_TEST_PATTERN_B    0x0606
> > +#define IMX519_REG_TEST_PATTERN_GB    0x0608
> > +#define IMX519_TEST_PATTERN_COLOUR_MIN    0
> > +#define IMX519_TEST_PATTERN_COLOUR_MAX    0x0fff
> > +#define IMX519_TEST_PATTERN_COLOUR_STEP    1
> > +#define IMX519_TEST_PATTERN_R_DEFAULT IMX519_TEST_PATTERN_COLOUR_MAX
> > +#define IMX519_TEST_PATTERN_GR_DEFAULT    0
> > +#define IMX519_TEST_PATTERN_B_DEFAULT    0
> > +#define IMX519_TEST_PATTERN_GB_DEFAULT    0
> > +
> > +/* IMX519 native and active pixel array size. */
> > +#define IMX519_NATIVE_WIDTH        4672U
> > +#define IMX519_NATIVE_HEIGHT        3648U
> > +#define IMX519_PIXEL_ARRAY_LEFT        8U
> > +#define IMX519_PIXEL_ARRAY_TOP        48U
> > +#define IMX519_PIXEL_ARRAY_WIDTH    4656U
> > +#define IMX519_PIXEL_ARRAY_HEIGHT    3496U
> > +
> > +struct imx519_reg {
> > +    u16 address;
> > +    u8 val;
> > +};
> > +
> > +struct imx519_reg_list {
> > +    unsigned int num_of_regs;
> > +    const struct imx519_reg *regs;
> > +};
> > +
> > +/* Mode : resolution and related config&values */
> > +struct imx519_mode {
> > +    /* Frame width */
> > +    unsigned int width;
> > +
> > +    /* Frame height */
> > +    unsigned int height;
> > +
> > +    /* H-timing in pixels */
> > +    unsigned int line_length_pix;
> > +
> > +    /* Analog crop rectangle. */
> > +    struct v4l2_rect crop;
> > +
> > +    /* Highest possible framerate. */
> > +    struct v4l2_fract timeperframe_min;
> > +
> > +    /* Default framerate. */
> > +    struct v4l2_fract timeperframe_default;
> > +
> > +    /* Default register values */
> > +    struct imx519_reg_list reg_list;
> > +};
> > +
> > +static const struct imx519_reg mode_common_regs[] = {
> > +    {0x0136, 0x18},
> > +    {0x0137, 0x00},
> > +    {0x3c7e, 0x01},
> > +    {0x3c7f, 0x07},
> > +    {0x3020, 0x00},
> > +    {0x3e35, 0x01},
> > +    {0x3f7f, 0x01},
> > +    {0x5609, 0x57},
> > +    {0x5613, 0x51},
> > +    {0x561f, 0x5e},
> > +    {0x5623, 0xd2},
> > +    {0x5637, 0x11},
> > +    {0x5657, 0x11},
> > +    {0x5659, 0x12},
> > +    {0x5733, 0x60},
> > +    {0x5905, 0x57},
> > +    {0x590f, 0x51},
> > +    {0x591b, 0x5e},
> > +    {0x591f, 0xd2},
> > +    {0x5933, 0x11},
> > +    {0x5953, 0x11},
> > +    {0x5955, 0x12},
> > +    {0x5a2f, 0x60},
> > +    {0x5a85, 0x57},
> > +    {0x5a8f, 0x51},
> > +    {0x5a9b, 0x5e},
> > +    {0x5a9f, 0xd2},
> > +    {0x5ab3, 0x11},
> > +    {0x5ad3, 0x11},
> > +    {0x5ad5, 0x12},
> > +    {0x5baf, 0x60},
> > +    {0x5c15, 0x2a},
> > +    {0x5c17, 0x80},
> > +    {0x5c19, 0x31},
> > +    {0x5c1b, 0x87},
> > +    {0x5c25, 0x25},
> > +    {0x5c27, 0x7b},
> > +    {0x5c29, 0x2a},
> > +    {0x5c2b, 0x80},
> > +    {0x5c2d, 0x31},
> > +    {0x5c2f, 0x87},
> > +    {0x5c35, 0x2b},
> > +    {0x5c37, 0x81},
> > +    {0x5c39, 0x31},
> > +    {0x5c3b, 0x87},
> > +    {0x5c45, 0x25},
> > +    {0x5c47, 0x7b},
> > +    {0x5c49, 0x2a},
> > +    {0x5c4b, 0x80},
> > +    {0x5c4d, 0x31},
> > +    {0x5c4f, 0x87},
> > +    {0x5c55, 0x2d},
> > +    {0x5c57, 0x83},
> > +    {0x5c59, 0x32},
> > +    {0x5c5b, 0x88},
> > +    {0x5c65, 0x29},
> > +    {0x5c67, 0x7f},
> > +    {0x5c69, 0x2e},
> > +    {0x5c6b, 0x84},
> > +    {0x5c6d, 0x32},
> > +    {0x5c6f, 0x88},
> > +    {0x5e69, 0x04},
> > +    {0x5e9d, 0x00},
> > +    {0x5f18, 0x10},
> > +    {0x5f1a, 0x0e},
> > +    {0x5f20, 0x12},
> > +    {0x5f22, 0x10},
> > +    {0x5f24, 0x0e},
> > +    {0x5f28, 0x10},
> > +    {0x5f2a, 0x0e},
> > +    {0x5f30, 0x12},
> > +    {0x5f32, 0x10},
> > +    {0x5f34, 0x0e},
> > +    {0x5f38, 0x0f},
> > +    {0x5f39, 0x0d},
> > +    {0x5f3c, 0x11},
> > +    {0x5f3d, 0x0f},
> > +    {0x5f3e, 0x0d},
> > +    {0x5f61, 0x07},
> > +    {0x5f64, 0x05},
> > +    {0x5f67, 0x03},
> > +    {0x5f6a, 0x03},
> > +    {0x5f6d, 0x07},
> > +    {0x5f70, 0x07},
> > +    {0x5f73, 0x05},
> > +    {0x5f76, 0x02},
> > +    {0x5f79, 0x07},
> > +    {0x5f7c, 0x07},
> > +    {0x5f7f, 0x07},
> > +    {0x5f82, 0x07},
> > +    {0x5f85, 0x03},
> > +    {0x5f88, 0x02},
> > +    {0x5f8b, 0x01},
> > +    {0x5f8e, 0x01},
> > +    {0x5f91, 0x04},
> > +    {0x5f94, 0x05},
> > +    {0x5f97, 0x02},
> > +    {0x5f9d, 0x07},
> > +    {0x5fa0, 0x07},
> > +    {0x5fa3, 0x07},
> > +    {0x5fa6, 0x07},
> > +    {0x5fa9, 0x03},
> > +    {0x5fac, 0x01},
> > +    {0x5faf, 0x01},
> > +    {0x5fb5, 0x03},
> > +    {0x5fb8, 0x02},
> > +    {0x5fbb, 0x01},
> > +    {0x5fc1, 0x07},
> > +    {0x5fc4, 0x07},
> > +    {0x5fc7, 0x07},
> > +    {0x5fd1, 0x00},
> > +    {0x6302, 0x79},
> > +    {0x6305, 0x78},
> > +    {0x6306, 0xa5},
> > +    {0x6308, 0x03},
> > +    {0x6309, 0x20},
> > +    {0x630b, 0x0a},
> > +    {0x630d, 0x48},
> > +    {0x630f, 0x06},
> > +    {0x6311, 0xa4},
> > +    {0x6313, 0x03},
> > +    {0x6314, 0x20},
> > +    {0x6316, 0x0a},
> > +    {0x6317, 0x31},
> > +    {0x6318, 0x4a},
> > +    {0x631a, 0x06},
> > +    {0x631b, 0x40},
> > +    {0x631c, 0xa4},
> > +    {0x631e, 0x03},
> > +    {0x631f, 0x20},
> > +    {0x6321, 0x0a},
> > +    {0x6323, 0x4a},
> > +    {0x6328, 0x80},
> > +    {0x6329, 0x01},
> > +    {0x632a, 0x30},
> > +    {0x632b, 0x02},
> > +    {0x632c, 0x20},
> > +    {0x632d, 0x02},
> > +    {0x632e, 0x30},
> > +    {0x6330, 0x60},
> > +    {0x6332, 0x90},
> > +    {0x6333, 0x01},
> > +    {0x6334, 0x30},
> > +    {0x6335, 0x02},
> > +    {0x6336, 0x20},
> > +    {0x6338, 0x80},
> > +    {0x633a, 0xa0},
> > +    {0x633b, 0x01},
> > +    {0x633c, 0x60},
> > +    {0x633d, 0x02},
> > +    {0x633e, 0x60},
> > +    {0x633f, 0x01},
> > +    {0x6340, 0x30},
> > +    {0x6341, 0x02},
> > +    {0x6342, 0x20},
> > +    {0x6343, 0x03},
> > +    {0x6344, 0x80},
> > +    {0x6345, 0x03},
> > +    {0x6346, 0x90},
> > +    {0x6348, 0xf0},
> > +    {0x6349, 0x01},
> > +    {0x634a, 0x20},
> > +    {0x634b, 0x02},
> > +    {0x634c, 0x10},
> > +    {0x634d, 0x03},
> > +    {0x634e, 0x60},
> > +    {0x6350, 0xa0},
> > +    {0x6351, 0x01},
> > +    {0x6352, 0x60},
> > +    {0x6353, 0x02},
> > +    {0x6354, 0x50},
> > +    {0x6355, 0x02},
> > +    {0x6356, 0x60},
> > +    {0x6357, 0x01},
> > +    {0x6358, 0x30},
> > +    {0x6359, 0x02},
> > +    {0x635a, 0x30},
> > +    {0x635b, 0x03},
> > +    {0x635c, 0x90},
> > +    {0x635f, 0x01},
> > +    {0x6360, 0x10},
> > +    {0x6361, 0x01},
> > +    {0x6362, 0x40},
> > +    {0x6363, 0x02},
> > +    {0x6364, 0x50},
> > +    {0x6368, 0x70},
> > +    {0x636a, 0xa0},
> > +    {0x636b, 0x01},
> > +    {0x636c, 0x50},
> > +    {0x637d, 0xe4},
> > +    {0x637e, 0xb4},
> > +    {0x638c, 0x8e},
> > +    {0x638d, 0x38},
> > +    {0x638e, 0xe3},
> > +    {0x638f, 0x4c},
> > +    {0x6390, 0x30},
> > +    {0x6391, 0xc3},
> > +    {0x6392, 0xae},
> > +    {0x6393, 0xba},
> > +    {0x6394, 0xeb},
> > +    {0x6395, 0x6e},
> > +    {0x6396, 0x34},
> > +    {0x6397, 0xe3},
> > +    {0x6398, 0xcf},
> > +    {0x6399, 0x3c},
> > +    {0x639a, 0xf3},
> > +    {0x639b, 0x0c},
> > +    {0x639c, 0x30},
> > +    {0x639d, 0xc1},
> > +    {0x63b9, 0xa3},
> > +    {0x63ba, 0xfe},
> > +    {0x7600, 0x01},
> > +    {0x79a0, 0x01},
> > +    {0x79a1, 0x01},
> > +    {0x79a2, 0x01},
> > +    {0x79a3, 0x01},
> > +    {0x79a4, 0x01},
> > +    {0x79a5, 0x20},
> > +    {0x79a9, 0x00},
> > +    {0x79aa, 0x01},
> > +    {0x79ad, 0x00},
> > +    {0x79af, 0x00},
> > +    {0x8173, 0x01},
> > +    {0x835c, 0x01},
> > +    {0x8a74, 0x01},
> > +    {0x8c1f, 0x00},
> > +    {0x8c27, 0x00},
> > +    {0x8c3b, 0x03},
> > +    {0x9004, 0x0b},
> > +    {0x920c, 0x6a},
> > +    {0x920d, 0x22},
> > +    {0x920e, 0x6a},
> > +    {0x920f, 0x23},
> > +    {0x9214, 0x6a},
> > +    {0x9215, 0x20},
> > +    {0x9216, 0x6a},
> > +    {0x9217, 0x21},
> > +    {0x9385, 0x3e},
> > +    {0x9387, 0x1b},
> > +    {0x938d, 0x4d},
> > +    {0x938f, 0x43},
> > +    {0x9391, 0x1b},
> > +    {0x9395, 0x4d},
> > +    {0x9397, 0x43},
> > +    {0x9399, 0x1b},
> > +    {0x939d, 0x3e},
> > +    {0x939f, 0x2f},
> > +    {0x93a5, 0x43},
> > +    {0x93a7, 0x2f},
> > +    {0x93a9, 0x2f},
> > +    {0x93ad, 0x34},
> > +    {0x93af, 0x2f},
> > +    {0x93b5, 0x3e},
> > +    {0x93b7, 0x2f},
> > +    {0x93bd, 0x4d},
> > +    {0x93bf, 0x43},
> > +    {0x93c1, 0x2f},
> > +    {0x93c5, 0x4d},
> > +    {0x93c7, 0x43},
> > +    {0x93c9, 0x2f},
> > +    {0x974b, 0x02},
> > +    {0x995c, 0x8c},
> > +    {0x995d, 0x00},
> > +    {0x995e, 0x00},
> > +    {0x9963, 0x64},
> > +    {0x9964, 0x50},
> > +    {0xaa0a, 0x26},
> > +    {0xae03, 0x04},
> > +    {0xae04, 0x03},
> > +    {0xae05, 0x03},
> > +    {0xbc1c, 0x08},
> > +    {0xbcf1, 0x02},
> > +};
> > +
> > +/* 16 mpix 10fps */
> > +static const struct imx519_reg mode_4656x3496_regs[] = {
> > +    {0x0111, 0x02},
> > +    {0x0112, 0x0a},
> > +    {0x0113, 0x0a},
> > +    {0x0114, 0x01},
> > +    {0x0342, 0x42},
> > +    {0x0343, 0x00},
> > +    {0x0340, 0x0d},
> > +    {0x0341, 0xf4},
> > +    {0x0344, 0x00},
> > +    {0x0345, 0x00},
> > +    {0x0346, 0x00},
> > +    {0x0347, 0x00},
> > +    {0x0348, 0x12},
> > +    {0x0349, 0x2f},
> > +    {0x034a, 0x0d},
> > +    {0x034b, 0xa7},
> > +    {0x0220, 0x00},
> > +    {0x0221, 0x11},
> > +    {0x0222, 0x01},
> > +    {0x0900, 0x00},
> > +    {0x0901, 0x11},
> > +    {0x0902, 0x0a},
> > +    {0x3f4c, 0x01},
> > +    {0x3f4d, 0x01},
> > +    {0x4254, 0x7f},
> > +    {0x0401, 0x00},
> > +    {0x0404, 0x00},
> > +    {0x0405, 0x10},
> > +    {0x0408, 0x00},
> > +    {0x0409, 0x00},
> > +    {0x040a, 0x00},
> > +    {0x040b, 0x00},
> > +    {0x040c, 0x12},
> > +    {0x040d, 0x30},
> > +    {0x040e, 0x0d},
> > +    {0x040f, 0xa8},
> > +    {0x034c, 0x12},
> > +    {0x034d, 0x30},
> > +    {0x034e, 0x0d},
> > +    {0x034f, 0xa8},
> > +    {0x0301, 0x06},
> > +    {0x0303, 0x04},
> > +    {0x0305, 0x04},
> > +    {0x0306, 0x01},
> > +    {0x0307, 0x57},
> > +    {0x0309, 0x0a},
> > +    {0x030b, 0x02},
> > +    {0x030d, 0x04},
> > +    {0x030e, 0x01},
> > +    {0x030f, 0x49},
> > +    {0x0310, 0x01},
> > +    {0x0820, 0x07},
> > +    {0x0821, 0xb6},
> > +    {0x0822, 0x00},
> > +    {0x0823, 0x00},
> > +    {0x3e20, 0x01},
> > +    {0x3e37, 0x00},
> > +    {0x3e3b, 0x00},
> > +    {0x0106, 0x00},
> > +    {0x0b00, 0x00},
> > +    {0x3230, 0x00},
> > +    {0x3f14, 0x01},
> > +    {0x3f3c, 0x01},
> > +    {0x3f0d, 0x0a},
> > +    {0x3fbc, 0x00},
> > +    {0x3c06, 0x00},
> > +    {0x3c07, 0x48},
> > +    {0x3c0a, 0x00},
> > +    {0x3c0b, 0x00},
> > +    {0x3f78, 0x00},
> > +    {0x3f79, 0x40},
> > +    {0x3f7c, 0x00},
> > +    {0x3f7d, 0x00},
> > +};
> > +
> > +/* 4k 21fps mode */
> > +static const struct imx519_reg mode_3840x2160_regs[] = {
> > +    {0x0111, 0x02},
> > +    {0x0112, 0x0a},
> > +    {0x0113, 0x0a},
> > +    {0x0114, 0x01},
> > +    {0x0342, 0x38},
> > +    {0x0343, 0x70},
> > +    {0x0340, 0x08},
> > +    {0x0341, 0xd4},
> > +    {0x0344, 0x01},
> > +    {0x0345, 0x98},
> > +    {0x0346, 0x02},
> > +    {0x0347, 0xa0},
> > +    {0x0348, 0x10},
> > +    {0x0349, 0x97},
> > +    {0x034a, 0x0b},
> > +    {0x034b, 0x17},
> > +    {0x0220, 0x00},
> > +    {0x0221, 0x11},
> > +    {0x0222, 0x01},
> > +    {0x0900, 0x00},
> > +    {0x0901, 0x11},
> > +    {0x0902, 0x0a},
> > +    {0x3f4c, 0x01},
> > +    {0x3f4d, 0x01},
> > +    {0x4254, 0x7f},
> > +    {0x0401, 0x00},
> > +    {0x0404, 0x00},
> > +    {0x0405, 0x10},
> > +    {0x0408, 0x00},
> > +    {0x0409, 0x00},
> > +    {0x040a, 0x00},
> > +    {0x040b, 0x00},
> > +    {0x040c, 0x0f},
> > +    {0x040d, 0x00},
> > +    {0x040e, 0x08},
> > +    {0x040f, 0x70},
> > +    {0x034c, 0x0f},
> > +    {0x034d, 0x00},
> > +    {0x034e, 0x08},
> > +    {0x034f, 0x70},
> > +    {0x0301, 0x06},
> > +    {0x0303, 0x04},
> > +    {0x0305, 0x04},
> > +    {0x0306, 0x01},
> > +    {0x0307, 0x57},
> > +    {0x0309, 0x0a},
> > +    {0x030b, 0x02},
> > +    {0x030d, 0x04},
> > +    {0x030e, 0x01},
> > +    {0x030f, 0x49},
> > +    {0x0310, 0x01},
> > +    {0x0820, 0x07},
> > +    {0x0821, 0xb6},
> > +    {0x0822, 0x00},
> > +    {0x0823, 0x00},
> > +    {0x3e20, 0x01},
> > +    {0x3e37, 0x00},
> > +    {0x3e3b, 0x00},
> > +    {0x0106, 0x00},
> > +    {0x0b00, 0x00},
> > +    {0x3230, 0x00},
> > +    {0x3f14, 0x01},
> > +    {0x3f3c, 0x01},
> > +    {0x3f0d, 0x0a},
> > +    {0x3fbc, 0x00},
> > +    {0x3c06, 0x00},
> > +    {0x3c07, 0x48},
> > +    {0x3c0a, 0x00},
> > +    {0x3c0b, 0x00},
> > +    {0x3f78, 0x00},
> > +    {0x3f79, 0x40},
> > +    {0x3f7c, 0x00},
> > +    {0x3f7d, 0x00},
> > +};
> > +
> > +/* 2x2 binned 30fps mode */
> > +static const struct imx519_reg mode_2328x1748_regs[] = {
> > +    {0x0111, 0x02},
> > +    {0x0112, 0x0a},
> > +    {0x0113, 0x0a},
> > +    {0x0114, 0x01},
> > +    {0x0342, 0x24},
> > +    {0x0343, 0x12},
> > +    {0x0340, 0x09},
> > +    {0x0341, 0xac},
> > +    {0x0344, 0x00},
> > +    {0x0345, 0x00},
> > +    {0x0346, 0x00},
> > +    {0x0347, 0x00},
> > +    {0x0348, 0x12},
> > +    {0x0349, 0x2f},
> > +    {0x034a, 0x0d},
> > +    {0x034b, 0xa7},
> > +    {0x0220, 0x00},
> > +    {0x0221, 0x11},
> > +    {0x0222, 0x01},
> > +    {0x0900, 0x01},
> > +    {0x0901, 0x22},
> > +    {0x0902, 0x0a},
> > +    {0x3f4c, 0x01},
> > +    {0x3f4d, 0x01},
> > +    {0x4254, 0x7f},
> > +    {0x0401, 0x00},
> > +    {0x0404, 0x00},
> > +    {0x0405, 0x10},
> > +    {0x0408, 0x00},
> > +    {0x0409, 0x00},
> > +    {0x040a, 0x00},
> > +    {0x040b, 0x00},
> > +    {0x040c, 0x09},
> > +    {0x040d, 0x18},
> > +    {0x040e, 0x06},
> > +    {0x040f, 0xd4},
> > +    {0x034c, 0x09},
> > +    {0x034d, 0x18},
> > +    {0x034e, 0x06},
> > +    {0x034f, 0xd4},
> > +    {0x0301, 0x06},
> > +    {0x0303, 0x04},
> > +    {0x0305, 0x04},
> > +    {0x0306, 0x01},
> > +    {0x0307, 0x57},
> > +    {0x0309, 0x0a},
> > +    {0x030b, 0x02},
> > +    {0x030d, 0x04},
> > +    {0x030e, 0x01},
> > +    {0x030f, 0x49},
> > +    {0x0310, 0x01},
> > +    {0x0820, 0x07},
> > +    {0x0821, 0xb6},
> > +    {0x0822, 0x00},
> > +    {0x0823, 0x00},
> > +    {0x3e20, 0x01},
> > +    {0x3e37, 0x00},
> > +    {0x3e3b, 0x00},
> > +    {0x0106, 0x00},
> > +    {0x0b00, 0x00},
> > +    {0x3230, 0x00},
> > +    {0x3f14, 0x01},
> > +    {0x3f3c, 0x01},
> > +    {0x3f0d, 0x0a},
> > +    {0x3fbc, 0x00},
> > +    {0x3c06, 0x00},
> > +    {0x3c07, 0x48},
> > +    {0x3c0a, 0x00},
> > +    {0x3c0b, 0x00},
> > +    {0x3f78, 0x00},
> > +    {0x3f79, 0x40},
> > +    {0x3f7c, 0x00},
> > +    {0x3f7d, 0x00},
> > +};
> > +
> > +/* 1080p 60fps mode */
> > +static const struct imx519_reg mode_1920x1080_regs[] = {
> > +    {0x0111, 0x02},
> > +    {0x0112, 0x0a},
> > +    {0x0113, 0x0a},
> > +    {0x0114, 0x01},
> > +    {0x0342, 0x25},
> > +    {0x0343, 0xd9},
> > +    {0x0340, 0x04},
> > +    {0x0341, 0x9c},
> > +    {0x0344, 0x01},
> > +    {0x0345, 0x98},
> > +    {0x0346, 0x02},
> > +    {0x0347, 0xa2},
> > +    {0x0348, 0x10},
> > +    {0x0349, 0x97},
> > +    {0x034a, 0x0b},
> > +    {0x034b, 0x15},
> > +    {0x0220, 0x00},
> > +    {0x0221, 0x11},
> > +    {0x0222, 0x01},
> > +    {0x0900, 0x01},
> > +    {0x0901, 0x22},
> > +    {0x0902, 0x0a},
> > +    {0x3f4c, 0x01},
> > +    {0x3f4d, 0x01},
> > +    {0x4254, 0x7f},
> > +    {0x0401, 0x00},
> > +    {0x0404, 0x00},
> > +    {0x0405, 0x10},
> > +    {0x0408, 0x00},
> > +    {0x0409, 0x00},
> > +    {0x040a, 0x00},
> > +    {0x040b, 0x00},
> > +    {0x040c, 0x07},
> > +    {0x040d, 0x80},
> > +    {0x040e, 0x04},
> > +    {0x040f, 0x38},
> > +    {0x034c, 0x07},
> > +    {0x034d, 0x80},
> > +    {0x034e, 0x04},
> > +    {0x034f, 0x38},
> > +    {0x0301, 0x06},
> > +    {0x0303, 0x04},
> > +    {0x0305, 0x04},
> > +    {0x0306, 0x01},
> > +    {0x0307, 0x57},
> > +    {0x0309, 0x0a},
> > +    {0x030b, 0x02},
> > +    {0x030d, 0x04},
> > +    {0x030e, 0x01},
> > +    {0x030f, 0x49},
> > +    {0x0310, 0x01},
> > +    {0x0820, 0x07},
> > +    {0x0821, 0xb6},
> > +    {0x0822, 0x00},
> > +    {0x0823, 0x00},
> > +    {0x3e20, 0x01},
> > +    {0x3e37, 0x00},
> > +    {0x3e3b, 0x00},
> > +    {0x0106, 0x00},
> > +    {0x0b00, 0x00},
> > +    {0x3230, 0x00},
> > +    {0x3f14, 0x01},
> > +    {0x3f3c, 0x01},
> > +    {0x3f0d, 0x0a},
> > +    {0x3fbc, 0x00},
> > +    {0x3c06, 0x00},
> > +    {0x3c07, 0x48},
> > +    {0x3c0a, 0x00},
> > +    {0x3c0b, 0x00},
> > +    {0x3f78, 0x00},
> > +    {0x3f79, 0x40},
> > +    {0x3f7c, 0x00},
> > +    {0x3f7d, 0x00},
> > +};
> > +
> > +/* 720p 120fps mode */
> > +static const struct imx519_reg mode_1280x720_regs[] = {
> > +    {0x0111, 0x02},
> > +    {0x0112, 0x0a},
> > +    {0x0113, 0x0a},
> > +    {0x0114, 0x01},
> > +    {0x0342, 0x1b},
> > +    {0x0343, 0x3b},
> > +    {0x0340, 0x03},
> > +    {0x0341, 0x34},
> > +    {0x0344, 0x04},
> > +    {0x0345, 0x18},
> > +    {0x0346, 0x04},
> > +    {0x0347, 0x12},
> > +    {0x0348, 0x0e},
> > +    {0x0349, 0x17},
> > +    {0x034a, 0x09},
> > +    {0x034b, 0xb6},
> > +    {0x0220, 0x00},
> > +    {0x0221, 0x11},
> > +    {0x0222, 0x01},
> > +    {0x0900, 0x01},
> > +    {0x0901, 0x22},
> > +    {0x0902, 0x0a},
> > +    {0x3f4c, 0x01},
> > +    {0x3f4d, 0x01},
> > +    {0x4254, 0x7f},
> > +    {0x0401, 0x00},
> > +    {0x0404, 0x00},
> > +    {0x0405, 0x10},
> > +    {0x0408, 0x00},
> > +    {0x0409, 0x00},
> > +    {0x040a, 0x00},
> > +    {0x040b, 0x00},
> > +    {0x040c, 0x05},
> > +    {0x040d, 0x00},
> > +    {0x040e, 0x02},
> > +    {0x040f, 0xd0},
> > +    {0x034c, 0x05},
> > +    {0x034d, 0x00},
> > +    {0x034e, 0x02},
> > +    {0x034f, 0xd0},
> > +    {0x0301, 0x06},
> > +    {0x0303, 0x04},
> > +    {0x0305, 0x04},
> > +    {0x0306, 0x01},
> > +    {0x0307, 0x57},
> > +    {0x0309, 0x0a},
> > +    {0x030b, 0x02},
> > +    {0x030d, 0x04},
> > +    {0x030e, 0x01},
> > +    {0x030f, 0x49},
> > +    {0x0310, 0x01},
> > +    {0x0820, 0x07},
> > +    {0x0821, 0xb6},
> > +    {0x0822, 0x00},
> > +    {0x0823, 0x00},
> > +    {0x3e20, 0x01},
> > +    {0x3e37, 0x00},
> > +    {0x3e3b, 0x00},
> > +    {0x0106, 0x00},
> > +    {0x0b00, 0x00},
> > +    {0x3230, 0x00},
> > +    {0x3f14, 0x01},
> > +    {0x3f3c, 0x01},
> > +    {0x3f0d, 0x0a},
> > +    {0x3fbc, 0x00},
> > +    {0x3c06, 0x00},
> > +    {0x3c07, 0x48},
> > +    {0x3c0a, 0x00},
> > +    {0x3c0b, 0x00},
> > +    {0x3f78, 0x00},
> > +    {0x3f79, 0x40},
> > +    {0x3f7c, 0x00},
> > +    {0x3f7d, 0x00},
> > +};
> > +
> > +/* Mode configs */
> > +static const struct imx519_mode supported_modes_10bit[] = {
> > +    {
> > +        .width = 4656,
> > +        .height = 3496,
> > +        .line_length_pix = 0x4200,
> > +        .crop = {
> > +            .left = IMX519_PIXEL_ARRAY_LEFT,
> > +            .top = IMX519_PIXEL_ARRAY_TOP,
> > +            .width = 4656,
> > +            .height = 3496,
> > +        },
> > +        .timeperframe_min = {
> > +            .numerator = 100,
> > +            .denominator = 1000
> > +        },
> > +        .timeperframe_default = {
> > +            .numerator = 100,
> > +            .denominator = 1000
> > +        },
> > +        .reg_list = {
> > +            .num_of_regs = ARRAY_SIZE(mode_4656x3496_regs),
> > +            .regs = mode_4656x3496_regs,
> > +        }
> > +    },
> > +    {
> > +        .width = 3840,
> > +        .height = 2160,
> > +        .line_length_pix = 0x3870,
> > +        .crop = {
> > +            .left = IMX519_PIXEL_ARRAY_LEFT + 408,
> > +            .top = IMX519_PIXEL_ARRAY_TOP + 672,
> > +            .width = 3840,
> > +            .height = 2160,
> > +        },
> > +        .timeperframe_min = {
> > +            .numerator = 100,
> > +            .denominator = 2100
> > +        },
> > +        .timeperframe_default = {
> > +            .numerator = 100,
> > +            .denominator = 2100
> > +        },
> > +        .reg_list = {
> > +            .num_of_regs = ARRAY_SIZE(mode_3840x2160_regs),
> > +            .regs = mode_3840x2160_regs,
> > +        }
> > +    },
> > +    {
> > +        .width = 2328,
> > +        .height = 1748,
> > +        .line_length_pix = 0x2412,
> > +        .crop = {
> > +            .left = IMX519_PIXEL_ARRAY_LEFT,
> > +            .top = IMX519_PIXEL_ARRAY_TOP,
> > +            .width = 4656,
> > +            .height = 3496,
> > +        },
> > +        .timeperframe_min = {
> > +            .numerator = 100,
> > +            .denominator = 3000
> > +        },
> > +        .timeperframe_default = {
> > +            .numerator = 100,
> > +            .denominator = 3000
> > +        },
> > +        .reg_list = {
> > +            .num_of_regs = ARRAY_SIZE(mode_2328x1748_regs),
> > +            .regs = mode_2328x1748_regs,
> > +        }
> > +    },
> > +    {
> > +        .width = 1920,
> > +        .height = 1080,
> > +        .line_length_pix = 0x25D9,
> > +        .crop = {
> > +            .left = IMX519_PIXEL_ARRAY_LEFT + 408,
> > +            .top = IMX519_PIXEL_ARRAY_TOP + 674,
> > +            .width = 3840,
> > +            .height = 2160,
> > +        },
> > +        .timeperframe_min = {
> > +            .numerator = 100,
> > +            .denominator = 6000
> > +        },
> > +        .timeperframe_default = {
> > +            .numerator = 100,
> > +            .denominator = 6000
> > +        },
> > +        .reg_list = {
> > +            .num_of_regs = ARRAY_SIZE(mode_1920x1080_regs),
> > +            .regs = mode_1920x1080_regs,
> > +        }
> > +    },
> > +    {
> > +        .width = 1280,
> > +        .height = 720,
> > +        .line_length_pix = 0x1B3B,
> > +        .crop = {
> > +            .left = IMX519_PIXEL_ARRAY_LEFT + 1048,
> > +            .top = IMX519_PIXEL_ARRAY_TOP + 1042,
> > +            .width = 2560,
> > +            .height = 1440,
> > +        },
> > +        .timeperframe_min = {
> > +            .numerator = 100,
> > +            .denominator = 12000
> > +        },
> > +        .timeperframe_default = {
> > +            .numerator = 100,
> > +            .denominator = 12000
> > +        },
> > +        .reg_list = {
> > +            .num_of_regs = ARRAY_SIZE(mode_1280x720_regs),
> > +            .regs = mode_1280x720_regs,
> > +        }
> > +    }
> > +};
> > +
> > +/*
> > + * The supported formats.
> > + * This table MUST contain 4 entries per format, to cover the 
> > various flip
> > + * combinations in the order
> > + * - no flip
> > + * - h flip
> > + * - v flip
> > + * - h&v flips
> > + */
> > +static const u32 codes[] = {
> > +    /* 10-bit modes. */
> > +    MEDIA_BUS_FMT_SRGGB10_1X10,
> > +    MEDIA_BUS_FMT_SGRBG10_1X10,
> > +    MEDIA_BUS_FMT_SGBRG10_1X10,
> > +    MEDIA_BUS_FMT_SBGGR10_1X10,
> > +};
> > +
> > +static const char * const imx519_test_pattern_menu[] = {
> > +    "Disabled",
> > +    "Color Bars",
> > +    "Solid Color",
> > +    "Grey Color Bars",
> > +    "PN9"
> > +};
> > +
> > +static const int imx519_test_pattern_val[] = {
> > +    IMX519_TEST_PATTERN_DISABLE,
> > +    IMX519_TEST_PATTERN_COLOR_BARS,
> > +    IMX519_TEST_PATTERN_SOLID_COLOR,
> > +    IMX519_TEST_PATTERN_GREY_COLOR,
> > +    IMX519_TEST_PATTERN_PN9,
> > +};
> > +
> > +/* regulator supplies */
> > +static const char * const imx519_supply_name[] = {
> > +    /* Supplies can be enabled in any order */
> > +    "vana",  /* Analog (2.8V) supply */
> > +    "vdig",  /* Digital Core (1.05V) supply */
> > +    "vddl",  /* IF (1.8V) supply */
> > +};
> > +
> > +#define IMX519_NUM_SUPPLIES ARRAY_SIZE(imx519_supply_name)
> > +
> > +/*
> > + * Initialisation delay between XCLR low->high and the moment when 
> > the sensor
> > + * can start capture (i.e. can leave software standby), given by T7 
> > in the
> > + * datasheet is 8ms.  This does include I2C setup time as well.
> > + *
> > + * Note, that delay between XCLR low->high and reading the CCI ID 
> > register (T6
> > + * in the datasheet) is much smaller - 600us.
> > + */
> > +#define IMX519_XCLR_MIN_DELAY_US    8000
> > +#define IMX519_XCLR_DELAY_RANGE_US    1000
> > +
> > +struct imx519 {
> > +    struct v4l2_subdev sd;
> > +    struct media_pad pad;
> > +
> > +    unsigned int fmt_code;
> > +
> > +    struct clk *xclk;
> > +
> > +    struct gpio_desc *reset_gpio;
> > +    struct regulator_bulk_data supplies[IMX519_NUM_SUPPLIES];
> > +
> > +    struct v4l2_ctrl_handler ctrl_handler;
> > +    /* V4L2 Controls */
> > +    struct v4l2_ctrl *exposure;
> > +    struct v4l2_ctrl *vflip;
> > +    struct v4l2_ctrl *hflip;
> > +    struct v4l2_ctrl *vblank;
> > +    struct v4l2_ctrl *hblank;
> > +
> > +    /* Current mode */
> > +    const struct imx519_mode *mode;
> > +
> > +    /*
> > +     * Mutex for serialized access:
> > +     * Protect sensor module set pad format and start/stop streaming 
> > safely.
> > +     */
> > +    struct mutex mutex;
> > +
> > +    /* Streaming on/off */
> > +    bool streaming;
> > +
> > +    /* Rewrite common registers on stream on? */
> > +    bool common_regs_written;
> > +
> > +    /* Current long exposure factor in use. Set through 
> > V4L2_CID_VBLANK */
> > +    unsigned int long_exp_shift;
> > +};
> > +
> > +static inline struct imx519 *to_imx519(struct v4l2_subdev *_sd)
> > +{
> > +    return container_of(_sd, struct imx519, sd);
> > +}
> > +
> > +/* Read registers up to 2 at a time */
> > +static int imx519_read_reg(struct imx519 *imx519, u16 reg, u32 len, 
> > u32 *val)
> > +{
> > +    struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +    struct i2c_msg msgs[2];
> > +    u8 addr_buf[2] = { reg >> 8, reg & 0xff };
> > +    u8 data_buf[4] = { 0, };
> > +    int ret;
> > +
> > +    if (len > 4)
> > +        return -EINVAL;
> > +
> > +    /* Write register address */
> > +    msgs[0].addr = client->addr;
> > +    msgs[0].flags = 0;
> > +    msgs[0].len = ARRAY_SIZE(addr_buf);
> > +    msgs[0].buf = addr_buf;
> > +
> > +    /* Read data from register */
> > +    msgs[1].addr = client->addr;
> > +    msgs[1].flags = I2C_M_RD;
> > +    msgs[1].len = len;
> > +    msgs[1].buf = &data_buf[4 - len];
> > +
> > +    ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
> > +    if (ret != ARRAY_SIZE(msgs))
> > +        return -EIO;
> > +
> > +    *val = get_unaligned_be32(data_buf);
> > +
> > +    return 0;
> > +}
> > +
> > +/* Write registers up to 2 at a time */
> > +static int imx519_write_reg(struct imx519 *imx519, u16 reg, u32 len, 
> > u32 val)
> > +{
> > +    struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +    u8 buf[6];
> > +
> > +    if (len > 4)
> > +        return -EINVAL;
> > +
> > +    put_unaligned_be16(reg, buf);
> > +    put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
> > +    if (i2c_master_send(client, buf, len + 2) != len + 2)
> > +        return -EIO;
> > +
> > +    return 0;
> > +}
> > +
> > +/* Write a list of registers */
> > +static int imx519_write_regs(struct imx519 *imx519,
> > +                 const struct imx519_reg *regs, u32 len)
> > +{
> > +    struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +    unsigned int i;
> > +    int ret;
> > +
> > +    for (i = 0; i < len; i++) {
> > +        ret = imx519_write_reg(imx519, regs[i].address, 1, 
> > regs[i].val);
> > +        if (ret) {
> > +            dev_err_ratelimited(&client->dev,
> > +                        "Failed to write reg 0x%4.4x. error = %d\n",
> > +                        regs[i].address, ret);
> > +
> > +            return ret;
> > +        }
> > +    }
> > +
> > +    return 0;
> > +}
> > +
> > +/* Get bayer order based on flip setting. */
> > +static u32 imx519_get_format_code(struct imx519 *imx519)
> > +{
> > +    unsigned int i;
> > +
> > +    lockdep_assert_held(&imx519->mutex);
> > +
> > +    i = (imx519->vflip->val ? 2 : 0) |
> > +        (imx519->hflip->val ? 1 : 0);
> > +
> > +    return codes[i];
> > +}
> > +
> > +static int imx519_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh 
> > *fh)
> > +{
> > +    struct imx519 *imx519 = to_imx519(sd);
> > +    struct v4l2_mbus_framefmt *try_fmt_img =
> > +        v4l2_subdev_get_try_format(sd, fh->state, 0);
> > +    struct v4l2_rect *try_crop =
> > +        v4l2_subdev_get_try_crop(sd, fh->state, 0);
> > +
> > +    mutex_lock(&imx519->mutex);
> > +
> > +    /* Initialize try_fmt for the image pad */
> > +    try_fmt_img->width = supported_modes_10bit[0].width;
> > +    try_fmt_img->height = supported_modes_10bit[0].height;
> > +    try_fmt_img->code = imx519_get_format_code(imx519);
> > +    try_fmt_img->field = V4L2_FIELD_NONE;
> > +
> > +    /* Initialize try_crop */
> > +    try_crop->left = IMX519_PIXEL_ARRAY_LEFT;
> > +    try_crop->top = IMX519_PIXEL_ARRAY_TOP;
> > +    try_crop->width = IMX519_PIXEL_ARRAY_WIDTH;
> > +    try_crop->height = IMX519_PIXEL_ARRAY_HEIGHT;
> > +
> > +    mutex_unlock(&imx519->mutex);
> > +
> > +    return 0;
> > +}
> > +
> > +static void imx519_adjust_exposure_range(struct imx519 *imx519)
> > +{
> > +    int exposure_max, exposure_def;
> > +
> > +    /* Honour the VBLANK limits when setting exposure. */
> > +    exposure_max = imx519->mode->height + imx519->vblank->val -
> > +               IMX519_EXPOSURE_OFFSET;
> > +    exposure_def = min(exposure_max, imx519->exposure->val);
> > +    __v4l2_ctrl_modify_range(imx519->exposure, 
> > imx519->exposure->minimum,
> > +                 exposure_max, imx519->exposure->step,
> > +                 exposure_def);
> > +}
> > +
> > +static int imx519_set_frame_length(struct imx519 *imx519, unsigned 
> > int val)
> > +{
> > +    int ret = 0;
> > +
> > +    imx519->long_exp_shift = 0;
> > +
> > +    while (val > IMX519_FRAME_LENGTH_MAX) {
> > +        imx519->long_exp_shift++;
> > +        val >>= 1;
> > +    }
> > +
> > +    ret = imx519_write_reg(imx519, IMX519_REG_FRAME_LENGTH,
> > +                   IMX519_REG_VALUE_16BIT, val);
> > +    if (ret)
> > +        return ret;
> > +
> > +    return imx519_write_reg(imx519, IMX519_LONG_EXP_SHIFT_REG,
> > +                IMX519_REG_VALUE_08BIT, imx519->long_exp_shift);
> > +}
> > +
> > +static int imx519_set_ctrl(struct v4l2_ctrl *ctrl)
> > +{
> > +    struct imx519 *imx519 =
> > +        container_of(ctrl->handler, struct imx519, ctrl_handler);
> > +    struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +    int ret = 0;
> > +
> > +    /*
> > +     * The VBLANK control may change the limits of usable exposure, 
> > so check
> > +     * and adjust if necessary.
> > +     */
> > +    if (ctrl->id == V4L2_CID_VBLANK)
> > +        imx519_adjust_exposure_range(imx519);
> > +
> > +    /*
> > +     * Applying V4L2 control value only happens
> > +     * when power is up for streaming
> > +     */
> > +    if (pm_runtime_get_if_in_use(&client->dev) == 0)
> > +        return 0;
> > +
> > +    switch (ctrl->id) {
> > +    case V4L2_CID_ANALOGUE_GAIN:
> > +        ret = imx519_write_reg(imx519, IMX519_REG_ANALOG_GAIN,
> > +                       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +        break;
> > +    case V4L2_CID_EXPOSURE:
> > +        ret = imx519_write_reg(imx519, IMX519_REG_EXPOSURE,
> > +                       IMX519_REG_VALUE_16BIT, ctrl->val >>
> > +                            imx519->long_exp_shift);
> > +        break;
> > +    case V4L2_CID_DIGITAL_GAIN:
> > +        ret = imx519_write_reg(imx519, IMX519_REG_DIGITAL_GAIN,
> > +                       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +        break;
> > +    case V4L2_CID_TEST_PATTERN:
> > +        ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN,
> > +                       IMX519_REG_VALUE_16BIT,
> > +                       imx519_test_pattern_val[ctrl->val]);
> > +        break;
> > +    case V4L2_CID_TEST_PATTERN_RED:
> > +        ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_R,
> > +                       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +        break;
> > +    case V4L2_CID_TEST_PATTERN_GREENR:
> > +        ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_GR,
> > +                       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +        break;
> > +    case V4L2_CID_TEST_PATTERN_BLUE:
> > +        ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_B,
> > +                       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +        break;
> > +    case V4L2_CID_TEST_PATTERN_GREENB:
> > +        ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_GB,
> > +                       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +        break;
> > +    case V4L2_CID_HFLIP:
> > +    case V4L2_CID_VFLIP:
> > +        ret = imx519_write_reg(imx519, IMX519_REG_ORIENTATION, 1,
> > +                       imx519->hflip->val |
> > +                       imx519->vflip->val << 1);
> > +        break;
> > +    case V4L2_CID_VBLANK:
> > +        ret = imx519_set_frame_length(imx519,
> > +                          imx519->mode->height + ctrl->val);
> > +        break;
> > +    default:
> > +        dev_info(&client->dev,
> > +             "ctrl(id:0x%x,val:0x%x) is not handled\n",
> > +             ctrl->id, ctrl->val);
> > +        ret = -EINVAL;
> > +        break;
> > +    }
> > +
> > +    pm_runtime_put(&client->dev);
> > +
> > +    return ret;
> > +}
> > +
> > +static const struct v4l2_ctrl_ops imx519_ctrl_ops = {
> > +    .s_ctrl = imx519_set_ctrl,
> > +};
> > +
> > +static int imx519_enum_mbus_code(struct v4l2_subdev *sd,
> > +                 struct v4l2_subdev_state *sd_state,
> > +                 struct v4l2_subdev_mbus_code_enum *code)
> > +{
> > +    struct imx519 *imx519 = to_imx519(sd);
> > +
> > +    if (code->index > 0)
> > +        return -EINVAL;
> > +
> > +    mutex_lock(&imx519->mutex);
> > +    code->code = imx519_get_format_code(imx519);
> > +    mutex_unlock(&imx519->mutex);
> > +
> > +    return 0;
> > +}
> > +
> > +static int imx519_enum_frame_size(struct v4l2_subdev *sd,
> > +                  struct v4l2_subdev_state *sd_state,
> > +                  struct v4l2_subdev_frame_size_enum *fse)
> > +{
> > +    struct imx519 *imx519 = to_imx519(sd);
> > +
> > +    if (fse->index >= ARRAY_SIZE(supported_modes_10bit))
> > +        return -EINVAL;
>
> missing mutex_unlock() before this return value

This is incorrect - I had a mutex_unlock () applied in my tree somehow 
and didn't notice there's the mutex_lock() just below that.

Sorry for the noise.
> > +
> > +    mutex_lock(&imx519->mutex);
> > +    if (fse->code != imx519_get_format_code(imx519)) {
> > +        mutex_unlock(&imx519->mutex);
> > +        return -EINVAL;
> > +    }
> > +    mutex_unlock(&imx519->mutex);
> > +
> > +    fse->min_width = supported_modes_10bit[fse->index].width;
> > +    fse->max_width = fse->min_width;
> > +    fse->min_height = supported_modes_10bit[fse->index].height;
> > +    fse->max_height = fse->min_height;
> > +
> > +    return 0;
> > +}
> > +
> > +static void imx519_reset_colorspace(struct v4l2_mbus_framefmt *fmt)
> > +{
> > +    fmt->colorspace = V4L2_COLORSPACE_RAW;
> > +    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 void imx519_update_image_pad_format(struct imx519 *imx519,
> > +                       const struct imx519_mode *mode,
> > +                       struct v4l2_subdev_format *fmt)
> > +{
> > +    fmt->format.width = mode->width;
> > +    fmt->format.height = mode->height;
> > +    fmt->format.field = V4L2_FIELD_NONE;
> > +    imx519_reset_colorspace(&fmt->format);
> > +}
> > +
> > +static int imx519_get_pad_format(struct v4l2_subdev *sd,
> > +                 struct v4l2_subdev_state *sd_state,
> > +                 struct v4l2_subdev_format *fmt)
> > +{
> > +    struct imx519 *imx519 = to_imx519(sd);
> > +
> > +    mutex_lock(&imx519->mutex);
> > +
> > +    if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> > +        struct v4l2_mbus_framefmt *try_fmt =
> > +            v4l2_subdev_get_try_format(&imx519->sd, sd_state,
> > +                           fmt->pad);
> > +        /* update the code which could change due to vflip or hflip: */
> > +        try_fmt->code = imx519_get_format_code(imx519);
> > +        fmt->format = *try_fmt;
> > +    } else {
> > +        imx519_update_image_pad_format(imx519, imx519->mode,
> > +                           fmt);
> > +        fmt->format.code = imx519_get_format_code(imx519);
> > +    }
> > +
> > +    mutex_unlock(&imx519->mutex);
> > +
> > +    return 0;
> > +}
> > +
> > +static
> > +unsigned int imx519_get_frame_length(const struct imx519_mode *mode,
> > +                     const struct v4l2_fract *timeperframe)
> > +{
> > +    u64 frame_length;
> > +
> > +    frame_length = (u64)timeperframe->numerator * IMX519_PIXEL_RATE;
> > +    do_div(frame_length,
> > +           (u64)timeperframe->denominator * mode->line_length_pix);
> > +
> > +    if (WARN_ON(frame_length > IMX519_FRAME_LENGTH_MAX))
> > +        frame_length = IMX519_FRAME_LENGTH_MAX;
> > +
> > +    return max_t(unsigned int, frame_length, mode->height);
> > +}
> > +
> > +static void imx519_set_framing_limits(struct imx519 *imx519)
> > +{
> > +    unsigned int frm_length_min, frm_length_default, hblank;
> > +    const struct imx519_mode *mode = imx519->mode;
> > +
> > +    frm_length_min = imx519_get_frame_length(mode, 
> > &mode->timeperframe_min);
> > +    frm_length_default =
> > +             imx519_get_frame_length(mode, 
> > &mode->timeperframe_default);
> > +
> > +    /* Default to no long exposure multiplier. */
> > +    imx519->long_exp_shift = 0;
> > +
> > +    /* Update limits and set FPS to default */
> > +    __v4l2_ctrl_modify_range(imx519->vblank, frm_length_min - 
> > mode->height,
> > +                 ((1 << IMX519_LONG_EXP_SHIFT_MAX) *
> > +                    IMX519_FRAME_LENGTH_MAX) - mode->height,
> > +                 1, frm_length_default - mode->height);
> > +
> > +    /* Setting this will adjust the exposure limits as well. */
> > +    __v4l2_ctrl_s_ctrl(imx519->vblank, frm_length_default - 
> > mode->height);
> > +
> > +    /*
> > +     * Currently PPL is fixed to the mode specified value, so hblank
> > +     * depends on mode->width only, and is not changeable in any
> > +     * way other than changing the mode.
> > +     */
> > +    hblank = mode->line_length_pix - mode->width;
> > +    __v4l2_ctrl_modify_range(imx519->hblank, hblank, hblank, 1, 
> > hblank);
> > +}
> > +
> > +static int imx519_set_pad_format(struct v4l2_subdev *sd,
> > +                 struct v4l2_subdev_state *sd_state,
> > +                 struct v4l2_subdev_format *fmt)
> > +{
> > +    struct v4l2_mbus_framefmt *framefmt;
> > +    const struct imx519_mode *mode;
> > +    struct imx519 *imx519 = to_imx519(sd);
> > +
> > +    mutex_lock(&imx519->mutex);
> > +
> > +    /* Bayer order varies with flips */
> > +    fmt->format.code = imx519_get_format_code(imx519);
> > +
> > +    mode = v4l2_find_nearest_size(supported_modes_10bit,
> > +                      ARRAY_SIZE(supported_modes_10bit),
> > +                      width, height,
> > +                      fmt->format.width,
> > +                      fmt->format.height);
> > +    imx519_update_image_pad_format(imx519, mode, fmt);
> > +    if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> > +        framefmt = v4l2_subdev_get_try_format(sd, sd_state,
> > +                              fmt->pad);
> > +        *framefmt = fmt->format;
> > +    } else {
> > +        imx519->mode = mode;
> > +        imx519->fmt_code = fmt->format.code;
> > +        imx519_set_framing_limits(imx519);
> > +    }
> > +
> > +    mutex_unlock(&imx519->mutex);
> > +
> > +    return 0;
> > +}
> > +
> > +static const struct v4l2_rect *
> > +__imx519_get_pad_crop(struct imx519 *imx519, struct 
> > v4l2_subdev_state *sd_state,
> > +              unsigned int pad, enum v4l2_subdev_format_whence which)
> > +{
> > +    switch (which) {
> > +    case V4L2_SUBDEV_FORMAT_TRY:
> > +        return v4l2_subdev_get_try_crop(&imx519->sd, sd_state, pad);
> > +    case V4L2_SUBDEV_FORMAT_ACTIVE:
> > +        return &imx519->mode->crop;
> > +    }
> > +
> > +    return NULL;
> > +}
> > +
> > +static int imx519_get_selection(struct v4l2_subdev *sd,
> > +                struct v4l2_subdev_state *sd_state,
> > +                struct v4l2_subdev_selection *sel)
> > +{
> > +    switch (sel->target) {
> > +    case V4L2_SEL_TGT_CROP: {
> > +        struct imx519 *imx519 = to_imx519(sd);
> > +
> > +        mutex_lock(&imx519->mutex);
> > +        sel->r = *__imx519_get_pad_crop(imx519, sd_state, sel->pad,
> > +                        sel->which);
> > +        mutex_unlock(&imx519->mutex);
> > +
> > +        return 0;
> > +    }
> > +
> > +    case V4L2_SEL_TGT_NATIVE_SIZE:
> > +        sel->r.left = 0;
> > +        sel->r.top = 0;
> > +        sel->r.width = IMX519_NATIVE_WIDTH;
> > +        sel->r.height = IMX519_NATIVE_HEIGHT;
> > +
> > +        return 0;
> > +
> > +    case V4L2_SEL_TGT_CROP_DEFAULT:
> > +    case V4L2_SEL_TGT_CROP_BOUNDS:
> > +        sel->r.left = IMX519_PIXEL_ARRAY_LEFT;
> > +        sel->r.top = IMX519_PIXEL_ARRAY_TOP;
> > +        sel->r.width = IMX519_PIXEL_ARRAY_WIDTH;
> > +        sel->r.height = IMX519_PIXEL_ARRAY_HEIGHT;
> > +
> > +        return 0;
> > +    }
> > +
> > +    return -EINVAL;
> > +}
> > +
> > +/* Start streaming */
> > +static int imx519_start_streaming(struct imx519 *imx519)
> > +{
> > +    struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +    const struct imx519_reg_list *reg_list;
> > +    int ret;
> > +
> > +    if (!imx519->common_regs_written) {
> > +        ret = imx519_write_regs(imx519, mode_common_regs,
> > +                    ARRAY_SIZE(mode_common_regs));
> > +
> > +        if (ret) {
> > +            dev_err(&client->dev, "%s failed to set common settings\n",
> > +                __func__);
> > +            return ret;
> > +        }
> > +        imx519->common_regs_written = true;
> > +    }
> > +
> > +    /* Apply default values of current mode */
> > +    reg_list = &imx519->mode->reg_list;
> > +    ret = imx519_write_regs(imx519, reg_list->regs, 
> > reg_list->num_of_regs);
> > +    if (ret) {
> > +        dev_err(&client->dev, "%s failed to set mode\n", __func__);
> > +        return ret;
> > +    }
> > +
> > +    /* Apply customized values from user */
> > +    ret = __v4l2_ctrl_handler_setup(imx519->sd.ctrl_handler);
> > +    if (ret)
> > +        return ret;
> > +
> > +    /* set stream on register */
> > +    return imx519_write_reg(imx519, IMX519_REG_MODE_SELECT,
> > +                IMX519_REG_VALUE_08BIT, IMX519_MODE_STREAMING);
> > +}
> > +
> > +/* Stop streaming */
> > +static int imx519_stop_streaming(struct imx519 *imx519)
> > +{
> > +    /* set stream off register */
> > +    return imx519_write_reg(imx519, IMX519_REG_MODE_SELECT,
> > +                IMX519_REG_VALUE_08BIT, IMX519_MODE_STANDBY);
> > +}
> > +
> > +static int imx519_set_stream(struct v4l2_subdev *sd, int enable)
> > +{
> > +    struct imx519 *imx519 = to_imx519(sd);
> > +    struct i2c_client *client = v4l2_get_subdevdata(sd);
> > +    int ret = 0;
> > +
> > +    mutex_lock(&imx519->mutex);
> > +    if (imx519->streaming == enable) {
> > +        mutex_unlock(&imx519->mutex);
> > +        return 0;
> > +    }
> > +
> > +    if (enable) {
> > +        ret = pm_runtime_resume_and_get(&client->dev);
> > +        if (ret < 0)
> > +            goto err_unlock;
> > +
> > +        /*
> > +         * Apply default & customized values
> > +         * and then start streaming.
> > +         */
> > +        ret = imx519_start_streaming(imx519);
> > +        if (ret)
> > +            goto err_rpm_put;
> > +    } else {
> > +        ret = imx519_stop_streaming(imx519);
> > +        pm_runtime_put(&client->dev);
> > +    }
> > +
> > +    imx519->streaming = enable;
> > +
> > +    /* vflip and hflip cannot change during streaming */
> > +    __v4l2_ctrl_grab(imx519->vflip, enable);
> > +    __v4l2_ctrl_grab(imx519->hflip, enable);
> > +
> > +    mutex_unlock(&imx519->mutex);
> > +
> > +    return ret;
> > +
> > +err_rpm_put:
> > +    pm_runtime_put(&client->dev);
> > +err_unlock:
> > +    mutex_unlock(&imx519->mutex);
> > +
> > +    return ret;
> > +}
> > +
> > +/* Power/clock management functions */
> > +static int imx519_power_on(struct device *dev)
> > +{
> > +    struct i2c_client *client = to_i2c_client(dev);
> > +    struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +    struct imx519 *imx519 = to_imx519(sd);
> > +    int ret;
> > +
> > +    ret = regulator_bulk_enable(IMX519_NUM_SUPPLIES,
> > +                    imx519->supplies);
> > +    if (ret) {
> > +        dev_err(&client->dev, "%s: failed to enable regulators\n",
> > +            __func__);
> > +        return ret;
> > +    }
> > +
> > +    ret = clk_prepare_enable(imx519->xclk);
> > +    if (ret) {
> > +        dev_err(&client->dev, "%s: failed to enable clock\n",
> > +            __func__);
> > +        goto reg_off;
> > +    }
> > +
> > +    gpiod_set_value_cansleep(imx519->reset_gpio, 1);
> > +    usleep_range(IMX519_XCLR_MIN_DELAY_US,
> > +             IMX519_XCLR_MIN_DELAY_US + IMX519_XCLR_DELAY_RANGE_US);
> > +
> > +    return 0;
> > +
> > +reg_off:
> > +    regulator_bulk_disable(IMX519_NUM_SUPPLIES, imx519->supplies);
> > +
> > +    return ret;
> > +}
> > +
> > +static int imx519_power_off(struct device *dev)
> > +{
> > +    struct i2c_client *client = to_i2c_client(dev);
> > +    struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +    struct imx519 *imx519 = to_imx519(sd);
> > +
> > +    gpiod_set_value_cansleep(imx519->reset_gpio, 0);
> > +    regulator_bulk_disable(IMX519_NUM_SUPPLIES, imx519->supplies);
> > +    clk_disable_unprepare(imx519->xclk);
> > +
> > +    /* Force reprogramming of the common registers when powered up 
> > again. */
> > +    imx519->common_regs_written = false;
> > +
> > +    return 0;
> > +}
> > +
> > +static int __maybe_unused imx519_suspend(struct device *dev)
> > +{
> > +    struct i2c_client *client = to_i2c_client(dev);
> > +    struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +    struct imx519 *imx519 = to_imx519(sd);
> > +    int ret;
>
> un-initialised variable which can get returned below.
> > +
> > +    if (imx519->streaming)
> > +        ret = imx519_stop_streaming(imx519);
> > +
> > +    return ret;
> > +}
> > +
> > +static int __maybe_unused imx519_resume(struct device *dev)
> > +{
> > +    struct i2c_client *client = to_i2c_client(dev);
> > +    struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +    struct imx519 *imx519 = to_imx519(sd);
> > +    int ret;
> > +
> > +    if (imx519->streaming) {
> > +        ret = imx519_start_streaming(imx519);
> > +        if (ret)
> > +            goto error;
> > +    }
> > +
> > +    return 0;
> > +
> > +error:
> > +    imx519_stop_streaming(imx519);
> > +    imx519->streaming = 0;
> > +
> > +    return ret;
> > +}
> > +
> > +static int imx519_get_regulators(struct imx519 *imx519)
> > +{
> > +    struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +    unsigned int i;
> > +
> > +    for (i = 0; i < IMX519_NUM_SUPPLIES; i++)
> > +        imx519->supplies[i].supply = imx519_supply_name[i];
> > +
> > +    return devm_regulator_bulk_get(&client->dev,
> > +                       IMX519_NUM_SUPPLIES,
> > +                       imx519->supplies);
> > +}
> > +
> > +/* Verify chip ID */
> > +static int imx519_identify_module(struct imx519 *imx519, u32 
> > expected_id)
> > +{
> > +    struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +    int ret;
> > +    u32 val;
> > +
> > +    ret = imx519_read_reg(imx519, IMX519_REG_CHIP_ID,
> > +                  IMX519_REG_VALUE_16BIT, &val);
> > +    if (ret) {
> > +        dev_err(&client->dev, "failed to read chip id %x, with error 
> > %d\n",
> > +            expected_id, ret);
> > +        return ret;
> > +    }
> > +
> > +    if (val != expected_id) {
> > +        dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
> > +            expected_id, val);
> > +        return -EIO;
> > +    }
> > +
> > +    dev_info(&client->dev, "Device found is imx%x\n", val);
> > +
> > +    return 0;
> > +}
> > +
> > +static const struct v4l2_subdev_core_ops imx519_core_ops = {
> > +    .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> > +    .unsubscribe_event = v4l2_event_subdev_unsubscribe,
> > +};
> > +
> > +static const struct v4l2_subdev_video_ops imx519_video_ops = {
> > +    .s_stream = imx519_set_stream,
> > +};
> > +
> > +static const struct v4l2_subdev_pad_ops imx519_pad_ops = {
> > +    .enum_mbus_code = imx519_enum_mbus_code,
> > +    .get_fmt = imx519_get_pad_format,
> > +    .set_fmt = imx519_set_pad_format,
> > +    .get_selection = imx519_get_selection,
> > +    .enum_frame_size = imx519_enum_frame_size,
> > +};
> > +
> > +static const struct v4l2_subdev_ops imx519_subdev_ops = {
> > +    .core = &imx519_core_ops,
> > +    .video = &imx519_video_ops,
> > +    .pad = &imx519_pad_ops,
> > +};
> > +
> > +static const struct v4l2_subdev_internal_ops imx519_internal_ops = {
> > +    .open = imx519_open,
> > +};
> > +
> > +/* Initialize control handlers */
> > +static int imx519_init_controls(struct imx519 *imx519)
> > +{
> > +    struct v4l2_ctrl_handler *ctrl_hdlr;
> > +    struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +    struct v4l2_fwnode_device_properties props;
> > +    unsigned int i;
> > +    int ret;
> > +
> > +    ctrl_hdlr = &imx519->ctrl_handler;
> > +    ret = v4l2_ctrl_handler_init(ctrl_hdlr, 16);
> > +    if (ret)
> > +        return ret;
> > +
> > +    mutex_init(&imx519->mutex);
> > +    ctrl_hdlr->lock = &imx519->mutex;
> > +
> > +    /* By default, PIXEL_RATE is read only */
> > +    v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops, V4L2_CID_PIXEL_RATE,
> > +              IMX519_PIXEL_RATE, IMX519_PIXEL_RATE, 1,
> > +              IMX519_PIXEL_RATE);
> > +
> > +    /*
> > +     * Create the controls here, but mode specific limits are setup
> > +     * in the imx519_set_framing_limits() call below.
> > +     */
> > +    imx519->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +                       V4L2_CID_VBLANK, 0, 0xffff, 1, 0);
> > +    imx519->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +                       V4L2_CID_HBLANK, 0, 0xffff, 1, 0);
> > +
> > +    /* HBLANK is read-only for now, but does change with mode. */
> > +    if (imx519->hblank)
> > +        imx519->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> > +
> > +    imx519->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +                         V4L2_CID_EXPOSURE,
> > +                         IMX519_EXPOSURE_MIN,
> > +                         IMX519_EXPOSURE_MAX,
> > +                         IMX519_EXPOSURE_STEP,
> > +                         IMX519_EXPOSURE_DEFAULT);
> > +
> > +    v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops, 
> > V4L2_CID_ANALOGUE_GAIN,
> > +              IMX519_ANA_GAIN_MIN, IMX519_ANA_GAIN_MAX,
> > +              IMX519_ANA_GAIN_STEP, IMX519_ANA_GAIN_DEFAULT);
> > +
> > +    v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops, 
> > V4L2_CID_DIGITAL_GAIN,
> > +              IMX519_DGTL_GAIN_MIN, IMX519_DGTL_GAIN_MAX,
> > +              IMX519_DGTL_GAIN_STEP, IMX519_DGTL_GAIN_DEFAULT);
> > +
> > +    imx519->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +                      V4L2_CID_HFLIP, 0, 1, 1, 0);
> > +    if (imx519->hflip)
> > +        imx519->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
> > +
> > +    imx519->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +                      V4L2_CID_VFLIP, 0, 1, 1, 0);
> > +    if (imx519->vflip)
> > +        imx519->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
> > +
> > +    v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx519_ctrl_ops,
> > +                     V4L2_CID_TEST_PATTERN,
> > +                     ARRAY_SIZE(imx519_test_pattern_menu) - 1,
> > +                     0, 0, imx519_test_pattern_menu);
> > +    for (i = 0; i < 4; i++) {
> > +        /*
> > +         * The assumption is that
> > +         * V4L2_CID_TEST_PATTERN_GREENR == V4L2_CID_TEST_PATTERN_RED 
> > + 1
> > +         * V4L2_CID_TEST_PATTERN_BLUE   == V4L2_CID_TEST_PATTERN_RED 
> > + 2
> > +         * V4L2_CID_TEST_PATTERN_GREENB == V4L2_CID_TEST_PATTERN_RED 
> > + 3
> > +         */
> > +        v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +                  V4L2_CID_TEST_PATTERN_RED + i,
> > +                  IMX519_TEST_PATTERN_COLOUR_MIN,
> > +                  IMX519_TEST_PATTERN_COLOUR_MAX,
> > +                  IMX519_TEST_PATTERN_COLOUR_STEP,
> > +                  IMX519_TEST_PATTERN_COLOUR_MAX);
> > +        /* The "Solid color" pattern is white by default */
> > +    }
> > +
> > +    if (ctrl_hdlr->error) {
> > +        ret = ctrl_hdlr->error;
> > +        dev_err(&client->dev, "%s control init failed (%d)\n",
> > +            __func__, ret);
> > +        goto error;
> > +    }
> > +
> > +    ret = v4l2_fwnode_device_parse(&client->dev, &props);
> > +    if (ret)
> > +        goto error;
> > +
> > +    ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx519_ctrl_ops,
> > +                          &props);
> > +    if (ret)
> > +        goto error;
> > +
> > +    imx519->sd.ctrl_handler = ctrl_hdlr;
> > +
> > +    mutex_lock(&imx519->mutex);
> > +
> > +    /* Setup exposure and frame/line length limits. */
> > +    imx519_set_framing_limits(imx519);
> > +
> > +    mutex_unlock(&imx519->mutex);
> > +
> > +    return 0;
> > +
> > +error:
> > +    v4l2_ctrl_handler_free(ctrl_hdlr);
> > +    mutex_destroy(&imx519->mutex);
> > +
> > +    return ret;
> > +}
> > +
> > +static void imx519_free_controls(struct imx519 *imx519)
> > +{
> > +    v4l2_ctrl_handler_free(imx519->sd.ctrl_handler);
> > +    mutex_destroy(&imx519->mutex);
> > +}
> > +
> > +static int imx519_check_hwcfg(struct device *dev)
> > +{
> > +    struct fwnode_handle *endpoint;
> > +    struct v4l2_fwnode_endpoint ep_cfg = {
> > +        .bus_type = V4L2_MBUS_CSI2_DPHY
> > +    };
> > +    int ret = -EINVAL;
> > +
> > +    endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
> > +    if (!endpoint) {
> > +        dev_err(dev, "endpoint node not found\n");
> > +        return -EINVAL;
> > +    }
> > +
> > +    if (v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep_cfg)) {
> > +        dev_err(dev, "could not parse endpoint\n");
> > +        goto error_out;
> > +    }
> > +
> > +    /* Check the number of MIPI CSI2 data lanes */
> > +    if (ep_cfg.bus.mipi_csi2.num_data_lanes != 2) {
> > +        dev_err(dev, "only 2 data lanes are currently supported\n");
> > +        goto error_out;
> > +    }
> > +
> > +    /* Check the link frequency set in device tree */
> > +    if (!ep_cfg.nr_of_link_frequencies) {
> > +        dev_err(dev, "link-frequency property not found in DT\n");
> > +        goto error_out;
> > +    }
> > +
> > +    if (ep_cfg.nr_of_link_frequencies != 1 ||
> > +        ep_cfg.link_frequencies[0] != IMX519_DEFAULT_LINK_FREQ) {
> > +        dev_err(dev, "Link frequency not supported: %lld\n",
> > +            ep_cfg.link_frequencies[0]);
> > +        goto error_out;
> > +    }
> > +
> > +    ret = 0;
> > +
> > +error_out:
> > +    v4l2_fwnode_endpoint_free(&ep_cfg);
> > +    fwnode_handle_put(endpoint);
> > +
> > +    return ret;
> > +}
> > +
> > +static const struct of_device_id imx519_dt_ids[] = {
> > +    { .compatible = "sony,imx519"},
> > +    { /* sentinel */ }
> > +};
> > +
> > +static int imx519_probe(struct i2c_client *client)
> > +{
> > +    struct device *dev = &client->dev;
> > +    struct imx519 *imx519;
> > +    const struct of_device_id *match;
> > +    u32 xclk_freq;
> > +    int ret;
> > +
> > +    imx519 = devm_kzalloc(&client->dev, sizeof(*imx519), GFP_KERNEL);
> > +    if (!imx519)
> > +        return -ENOMEM;
> > +
> > +    v4l2_i2c_subdev_init(&imx519->sd, client, &imx519_subdev_ops);
> > +
> > +    match = of_match_device(imx519_dt_ids, dev);
> > +    if (!match)
> > +        return -ENODEV;
> > +
> > +    /* Check the hardware configuration in device tree */
> > +    if (imx519_check_hwcfg(dev))
> > +        return -EINVAL;
> > +
> > +    /* Get system clock (xclk) */
> > +    imx519->xclk = devm_clk_get(dev, NULL);
> > +    if (IS_ERR(imx519->xclk)) {
> > +        dev_err(dev, "failed to get xclk\n");
> > +        return PTR_ERR(imx519->xclk);
> > +    }
> > +
> > +    xclk_freq = clk_get_rate(imx519->xclk);
> > +    if (xclk_freq != IMX519_XCLK_FREQ) {
> > +        dev_err(dev, "xclk frequency not supported: %d Hz\n",
> > +            xclk_freq);
> > +        return -EINVAL;
> > +    }
> > +
> > +    ret = imx519_get_regulators(imx519);
> > +    if (ret) {
> > +        dev_err(dev, "failed to get regulators\n");
> > +        return ret;
> > +    }
> > +
> > +    /* Request optional enable pin */
> > +    imx519->reset_gpio = devm_gpiod_get_optional(dev, "reset",
> > +                             GPIOD_OUT_HIGH);
> > +
> > +    /*
> > +     * The sensor must be powered for imx519_identify_module()
> > +     * to be able to read the CHIP_ID register
> > +     */
> > +    ret = imx519_power_on(dev);
> > +    if (ret)
> > +        return ret;
> > +
> > +    ret = imx519_identify_module(imx519, IMX519_CHIP_ID);
> > +    if (ret)
> > +        goto error_power_off;
> > +
> > +    /* Set default mode to max resolution */
> > +    imx519->mode = &supported_modes_10bit[0];
> > +    imx519->fmt_code = MEDIA_BUS_FMT_SRGGB10_1X10;
> > +
> > +    /* Enable runtime PM and turn off the device */
> > +    pm_runtime_set_active(dev);
> > +    pm_runtime_enable(dev);
> > +    pm_runtime_idle(dev);
> > +
> > +    /* This needs the pm runtime to be registered. */
> > +    ret = imx519_init_controls(imx519);
> > +    if (ret)
> > +        goto error_rpm_disable;
> > +
> > +    /* Initialize subdev */
> > +    imx519->sd.internal_ops = &imx519_internal_ops;
> > +    imx519->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
> > +                V4L2_SUBDEV_FL_HAS_EVENTS;
> > +    imx519->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> > +
> > +    /* Initialize source pads */
> > +    imx519->pad.flags = MEDIA_PAD_FL_SOURCE;
> > +
> > +    ret = media_entity_pads_init(&imx519->sd.entity, 1, &imx519->pad);
> > +    if (ret) {
> > +        dev_err(dev, "failed to init entity pads: %d\n", ret);
> > +        goto error_handler_free;
> > +    }
> > +
> > +    ret = v4l2_async_register_subdev_sensor(&imx519->sd);
> > +    if (ret < 0) {
> > +        dev_err(dev, "failed to register sensor sub-device: %d\n", 
> > ret);
> > +        goto error_media_entity;
> > +    }
> > +
> > +    return 0;
> > +
> > +error_media_entity:
> > +    media_entity_cleanup(&imx519->sd.entity);
> > +
> > +error_handler_free:
> > +    imx519_free_controls(imx519);
> > +
> > +error_rpm_disable:
> > +    pm_runtime_disable(&client->dev);
> > +    pm_runtime_set_suspended(&client->dev);
> > +
> > +error_power_off:
> > +    imx519_power_off(&client->dev);
> > +
> > +    return ret;
> > +}
> > +
> > +static void imx519_remove(struct i2c_client *client)
> > +{
> > +    struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +    struct imx519 *imx519 = to_imx519(sd);
> > +
> > +    v4l2_async_unregister_subdev(sd);
> > +    media_entity_cleanup(&sd->entity);
> > +    imx519_free_controls(imx519);
> > +
> > +    pm_runtime_disable(&client->dev);
> > +    if (!pm_runtime_status_suspended(&client->dev))
> > +        imx519_power_off(&client->dev);
> > +    pm_runtime_set_suspended(&client->dev);
> > +}
> > +
> > +MODULE_DEVICE_TABLE(of, imx519_dt_ids);
> > +
> > +static const struct dev_pm_ops imx519_pm_ops = {
> > +    SET_SYSTEM_SLEEP_PM_OPS(imx519_suspend, imx519_resume)
> > +    SET_RUNTIME_PM_OPS(imx519_power_off, imx519_power_on, NULL)
> > +};
> > +
> > +static struct i2c_driver imx519_i2c_driver = {
> > +    .driver = {
> > +        .name = "imx519",
> > +        .of_match_table    = imx519_dt_ids,
> > +        .pm = &imx519_pm_ops,
> > +    },
> > +    .probe_new = imx519_probe,
> > +    .remove = imx519_remove,
> > +};
> > +
> > +module_i2c_driver(imx519_i2c_driver);
> > +
> > +MODULE_AUTHOR("Lee <lee@xxxxxxxxxxx>");
> > +MODULE_DESCRIPTION("Sony IMX519 sensor driver");
> > +MODULE_LICENSE("GPL v2");