Hi Daniel,
On Mon, Nov 01, 2021 at 11:21:41PM +0000, Daniel Scally wrote:
> The OV5693 is a 5 Mpx CMOS image sensor, connected via MIPI CSI-2. The
> chip is capable of a single lane configuration, but currently only two
> lanes are supported.
>
> Most of the sensor's features are supported, with the main exception
> being the lens correction algorithm.
>
> The driver provides all mandatory, optional and recommended V4L2 controls
> for maximum compatibility with libcamera.
>
> Signed-off-by: Daniel Scally <djrscally@xxxxxxxxx>
> ---
> Changes in v5:
>
> - Tidied a bunch of long lines
>
> MAINTAINERS | 7 +
> drivers/media/i2c/Kconfig | 11 +
> drivers/media/i2c/Makefile | 1 +
> drivers/media/i2c/ov5693.c | 1536 ++++++++++++++++++++++++++++++++++++
> 4 files changed, 1555 insertions(+)
> create mode 100644 drivers/media/i2c/ov5693.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index df69dfe482e7..4669933ffed9 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -13872,6 +13872,13 @@ S: Maintained
> T: git git://linuxtv.org/media_tree.git
> F: drivers/media/i2c/ov5675.c
>
> +OMNIVISION OV5693 SENSOR DRIVER
> +M: Daniel Scally <djrscally@xxxxxxxxx>
> +L: linux-media@xxxxxxxxxxxxxxx
> +S: Maintained
> +T: git git://linuxtv.org/media_tree.git
> +F: drivers/media/i2c/ov5693.c
> +
> OMNIVISION OV5695 SENSOR DRIVER
> M: Shunqian Zheng <zhengsq@xxxxxxxxxxxxxx>
> L: linux-media@xxxxxxxxxxxxxxx
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index d6a5d4ca439a..8761a90a7a86 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -1058,6 +1058,17 @@ config VIDEO_OV5675
> To compile this driver as a module, choose M here: the
> module will be called ov5675.
>
> +config VIDEO_OV5693
> + tristate "OmniVision OV5693 sensor support"
> + depends on I2C && VIDEO_V4L2
> + select V4L2_FWNODE
> + help
> + This is a Video4Linux2 sensor driver for the OmniVision
> + OV5693 camera.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called ov5693.
> +
> config VIDEO_OV5695
> tristate "OmniVision OV5695 sensor support"
> depends on I2C && VIDEO_V4L2
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index 4d4fe08d7a6a..b01f6cd05ee8 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -75,6 +75,7 @@ obj-$(CONFIG_VIDEO_OV5647) += ov5647.o
> obj-$(CONFIG_VIDEO_OV5648) += ov5648.o
> obj-$(CONFIG_VIDEO_OV5670) += ov5670.o
> obj-$(CONFIG_VIDEO_OV5675) += ov5675.o
> +obj-$(CONFIG_VIDEO_OV5693) += ov5693.o
> obj-$(CONFIG_VIDEO_OV5695) += ov5695.o
> obj-$(CONFIG_VIDEO_OV6650) += ov6650.o
> obj-$(CONFIG_VIDEO_OV7251) += ov7251.o
> diff --git a/drivers/media/i2c/ov5693.c b/drivers/media/i2c/ov5693.c
> new file mode 100644
> index 000000000000..8ad51f8f88cf
> --- /dev/null
> +++ b/drivers/media/i2c/ov5693.c
> @@ -0,0 +1,1536 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2013 Intel Corporation. All Rights Reserved.
> + *
> + * Adapted from the atomisp-ov5693 driver, with contributions from:
> + *
> + * Daniel Scally
> + * Jean-Michel Hautbois
> + * Fabian Wuthrich
> + * Tsuchiya Yuto
> + * Jordan Hand
> + * Jake Day
> + */
> +
> +#include <asm/unaligned.h>
> +#include <linux/acpi.h>
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/device.h>
> +#include <linux/i2c.h>
> +#include <linux/module.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/slab.h>
> +#include <linux/types.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-fwnode.h>
> +
> +#define OV5693_REG_8BIT(n) ((1 << 16) | (n))
> +#define OV5693_REG_16BIT(n) ((2 << 16) | (n))
> +#define OV5693_REG_24BIT(n) ((3 << 16) | (n))
> +#define OV5693_REG_SIZE_SHIFT 16
> +#define OV5693_REG_ADDR_MASK 0xffff
> +
> +/* System Control */
> +#define OV5693_SW_RESET_REG OV5693_REG_8BIT(0x0103)
> +#define OV5693_SW_STREAM_REG OV5693_REG_8BIT(0x0100)
> +#define OV5693_START_STREAMING 0x01
> +#define OV5693_STOP_STREAMING 0x00
> +#define OV5693_SW_RESET 0x01
> +
> +#define OV5693_REG_CHIP_ID OV5693_REG_16BIT(0x300a)
> +/* Yes, this is right. The datasheet for the OV5693 gives its ID as 0x5690 */
> +#define OV5693_CHIP_ID 0x5690
> +
> +/* Exposure */
> +#define OV5693_EXPOSURE_CTRL_REG OV5693_REG_24BIT(0x3500)
> +#define OV5693_EXPOSURE_CTRL_MASK GENMASK(19, 4)
> +#define OV5693_INTEGRATION_TIME_MARGIN 8
> +#define OV5693_EXPOSURE_MIN 1
> +#define OV5693_EXPOSURE_STEP 1
> +
> +/* Analogue Gain */
> +#define OV5693_GAIN_CTRL_REG OV5693_REG_16BIT(0x350a)
> +#define OV5693_GAIN_CTRL_MASK GENMASK(10, 4)
> +#define OV5693_GAIN_MIN 1
> +#define OV5693_GAIN_MAX 127
> +#define OV5693_GAIN_DEF 8
> +#define OV5693_GAIN_STEP 1
> +
> +/* Digital Gain */
> +#define OV5693_MWB_RED_GAIN_REG OV5693_REG_16BIT(0x3400)
> +#define OV5693_MWB_GREEN_GAIN_REG OV5693_REG_16BIT(0x3402)
> +#define OV5693_MWB_BLUE_GAIN_REG OV5693_REG_16BIT(0x3404)
> +#define OV5693_MWB_GAIN_MASK GENMASK(11, 0)
> +#define OV5693_MWB_GAIN_MAX 0x0fff
> +#define OV5693_DIGITAL_GAIN_MIN 1
> +#define OV5693_DIGITAL_GAIN_MAX 4095
> +#define OV5693_DIGITAL_GAIN_DEF 1024
> +#define OV5693_DIGITAL_GAIN_STEP 1
> +
> +/* Timing and Format */
> +#define OV5693_CROP_START_X_REG OV5693_REG_16BIT(0x3800)
> +#define OV5693_CROP_START_Y_REG OV5693_REG_16BIT(0x3802)
> +#define OV5693_CROP_END_X_REG OV5693_REG_16BIT(0x3804)
> +#define OV5693_CROP_END_Y_REG OV5693_REG_16BIT(0x3806)
> +#define OV5693_OUTPUT_SIZE_X_REG OV5693_REG_16BIT(0x3808)
> +#define OV5693_OUTPUT_SIZE_Y_REG OV5693_REG_16BIT(0x380a)
> +
> +#define OV5693_TIMING_HTS_REG OV5693_REG_16BIT(0x380c)
> +#define OV5693_FIXED_PPL 2688U
> +#define OV5693_TIMING_VTS_REG OV5693_REG_16BIT(0x380e)
> +#define OV5693_TIMING_MAX_VTS 0xffff
> +#define OV5693_TIMING_MIN_VTS 0x04
> +
> +#define OV5693_OFFSET_START_X_REG OV5693_REG_16BIT(0x3810)
> +#define OV5693_OFFSET_START_Y_REG OV5693_REG_16BIT(0x3812)
> +
> +#define OV5693_SUB_INC_X_REG OV5693_REG_8BIT(0x3814)
> +#define OV5693_SUB_INC_Y_REG OV5693_REG_8BIT(0x3815)
> +
> +#define OV5693_FORMAT1_REG OV5693_REG_8BIT(0x3820)
> +#define OV5693_FORMAT1_FLIP_VERT_ISP_EN BIT(6)
> +#define OV5693_FORMAT1_FLIP_VERT_SENSOR_EN BIT(1)
> +#define OV5693_FORMAT1_VBIN_EN BIT(0)
> +#define OV5693_FORMAT2_REG OV5693_REG_8BIT(0x3821)
> +#define OV5693_FORMAT2_HDR_EN BIT(7)
> +#define OV5693_FORMAT2_FLIP_HORZ_ISP_EN BIT(2)
> +#define OV5693_FORMAT2_FLIP_HORZ_SENSOR_EN BIT(1)
> +#define OV5693_FORMAT2_HBIN_EN BIT(0)
> +
> +#define OV5693_ISP_CTRL2_REG OV5693_REG_8BIT(0x5002)
> +#define OV5693_ISP_SCALE_ENABLE BIT(7)
> +
> +/* Pixel Array */
> +#define OV5693_NATIVE_WIDTH 2624
> +#define OV5693_NATIVE_HEIGHT 1956
> +#define OV5693_NATIVE_START_LEFT 0
> +#define OV5693_NATIVE_START_TOP 0
> +#define OV5693_ACTIVE_WIDTH 2592
> +#define OV5693_ACTIVE_HEIGHT 1944
> +#define OV5693_ACTIVE_START_LEFT 16
> +#define OV5693_ACTIVE_START_TOP 6
> +#define OV5693_MIN_CROP_WIDTH 2
> +#define OV5693_MIN_CROP_HEIGHT 2
> +
> +/* Test Pattern */
> +#define OV5693_TEST_PATTERN_REG OV5693_REG_8BIT(0x5e00)
> +#define OV5693_TEST_PATTERN_ENABLE BIT(7)
> +#define OV5693_TEST_PATTERN_ROLLING BIT(6)
> +#define OV5693_TEST_PATTERN_RANDOM 0x01
> +#define OV5693_TEST_PATTERN_BARS 0x00
> +
> +/* System Frequencies */
> +#define OV5693_XVCLK_FREQ 19200000
> +#define OV5693_LINK_FREQ_419_2MHZ 419200000
> +#define OV5693_PIXEL_RATE 167680000
> +
> +/* Miscellaneous */
> +#define OV5693_NUM_SUPPLIES 2
> +
> +#define to_ov5693_sensor(x) container_of(x, struct ov5693_device, sd)
> +
> +struct ov5693_reg {
> + u32 reg;
> + u8 val;
> +};
> +
> +struct ov5693_reg_list {
> + u32 num_regs;
> + const struct ov5693_reg *regs;
> +};
> +
> +struct ov5693_device {
> + struct i2c_client *client;
> + struct device *dev;
> +
> + /* Protect against concurrent changes to controls */
> + struct mutex lock;
> +
> + struct gpio_desc *reset;
> + struct gpio_desc *powerdown;
> + struct regulator_bulk_data supplies[OV5693_NUM_SUPPLIES];
> + struct clk *clk;
> +
> + struct ov5693_mode {
> + struct v4l2_rect crop;
> + struct v4l2_mbus_framefmt format;
> + bool binning_x;
> + bool binning_y;
> + unsigned int inc_x_odd;
> + unsigned int inc_y_odd;
> + unsigned int vts;
> + } mode;
> + bool streaming;
> +
> + struct v4l2_subdev sd;
> + struct media_pad pad;
> +
> + struct ov5693_v4l2_ctrls {
> + struct v4l2_ctrl_handler handler;
> + struct v4l2_ctrl *link_freq;
> + struct v4l2_ctrl *pixel_rate;
> + struct v4l2_ctrl *exposure;
> + struct v4l2_ctrl *analogue_gain;
> + struct v4l2_ctrl *digital_gain;
> + struct v4l2_ctrl *hflip;
> + struct v4l2_ctrl *vflip;
> + struct v4l2_ctrl *hblank;
> + struct v4l2_ctrl *vblank;
> + struct v4l2_ctrl *test_pattern;
> + } ctrls;
> +};
> +
> +static const struct ov5693_reg ov5693_global_regs[] = {
> + {OV5693_REG_8BIT(0x3016), 0xf0},
> + {OV5693_REG_8BIT(0x3017), 0xf0},
> + {OV5693_REG_8BIT(0x3018), 0xf0},
> + {OV5693_REG_8BIT(0x3022), 0x01},
> + {OV5693_REG_8BIT(0x3028), 0x44},
> + {OV5693_REG_8BIT(0x3098), 0x02},
> + {OV5693_REG_8BIT(0x3099), 0x19},
> + {OV5693_REG_8BIT(0x309a), 0x02},
> + {OV5693_REG_8BIT(0x309b), 0x01},
> + {OV5693_REG_8BIT(0x309c), 0x00},
> + {OV5693_REG_8BIT(0x30a0), 0xd2},
> + {OV5693_REG_8BIT(0x30a2), 0x01},
> + {OV5693_REG_8BIT(0x30b2), 0x00},
> + {OV5693_REG_8BIT(0x30b3), 0x83},
> + {OV5693_REG_8BIT(0x30b4), 0x03},
> + {OV5693_REG_8BIT(0x30b5), 0x04},
> + {OV5693_REG_8BIT(0x30b6), 0x01},
> + {OV5693_REG_8BIT(0x3080), 0x01},
> + {OV5693_REG_8BIT(0x3104), 0x21},
> + {OV5693_REG_8BIT(0x3106), 0x00},
> + {OV5693_REG_8BIT(0x3406), 0x01},
> + {OV5693_REG_8BIT(0x3503), 0x07},
> + {OV5693_REG_8BIT(0x350b), 0x40},
> + {OV5693_REG_8BIT(0x3601), 0x0a},
> + {OV5693_REG_8BIT(0x3602), 0x38},
> + {OV5693_REG_8BIT(0x3612), 0x80},
> + {OV5693_REG_8BIT(0x3620), 0x54},
> + {OV5693_REG_8BIT(0x3621), 0xc7},
> + {OV5693_REG_8BIT(0x3622), 0x0f},
> + {OV5693_REG_8BIT(0x3625), 0x10},
> + {OV5693_REG_8BIT(0x3630), 0x55},
> + {OV5693_REG_8BIT(0x3631), 0xf4},
> + {OV5693_REG_8BIT(0x3632), 0x00},
> + {OV5693_REG_8BIT(0x3633), 0x34},
> + {OV5693_REG_8BIT(0x3634), 0x02},
> + {OV5693_REG_8BIT(0x364d), 0x0d},
> + {OV5693_REG_8BIT(0x364f), 0xdd},
> + {OV5693_REG_8BIT(0x3660), 0x04},
> + {OV5693_REG_8BIT(0x3662), 0x10},
> + {OV5693_REG_8BIT(0x3663), 0xf1},
> + {OV5693_REG_8BIT(0x3665), 0x00},
> + {OV5693_REG_8BIT(0x3666), 0x20},
> + {OV5693_REG_8BIT(0x3667), 0x00},
> + {OV5693_REG_8BIT(0x366a), 0x80},
> + {OV5693_REG_8BIT(0x3680), 0xe0},
> + {OV5693_REG_8BIT(0x3681), 0x00},
> + {OV5693_REG_8BIT(0x3700), 0x42},
> + {OV5693_REG_8BIT(0x3701), 0x14},
> + {OV5693_REG_8BIT(0x3702), 0xa0},
> + {OV5693_REG_8BIT(0x3703), 0xd8},
> + {OV5693_REG_8BIT(0x3704), 0x78},
> + {OV5693_REG_8BIT(0x3705), 0x02},
> + {OV5693_REG_8BIT(0x370a), 0x00},
> + {OV5693_REG_8BIT(0x370b), 0x20},
> + {OV5693_REG_8BIT(0x370c), 0x0c},
> + {OV5693_REG_8BIT(0x370d), 0x11},
> + {OV5693_REG_8BIT(0x370e), 0x00},
> + {OV5693_REG_8BIT(0x370f), 0x40},
> + {OV5693_REG_8BIT(0x3710), 0x00},
> + {OV5693_REG_8BIT(0x371a), 0x1c},
> + {OV5693_REG_8BIT(0x371b), 0x05},
> + {OV5693_REG_8BIT(0x371c), 0x01},
> + {OV5693_REG_8BIT(0x371e), 0xa1},
> + {OV5693_REG_8BIT(0x371f), 0x0c},
> + {OV5693_REG_8BIT(0x3721), 0x00},
> + {OV5693_REG_8BIT(0x3724), 0x10},
> + {OV5693_REG_8BIT(0x3726), 0x00},
> + {OV5693_REG_8BIT(0x372a), 0x01},
> + {OV5693_REG_8BIT(0x3730), 0x10},
> + {OV5693_REG_8BIT(0x3738), 0x22},
> + {OV5693_REG_8BIT(0x3739), 0xe5},
> + {OV5693_REG_8BIT(0x373a), 0x50},
> + {OV5693_REG_8BIT(0x373b), 0x02},
> + {OV5693_REG_8BIT(0x373c), 0x41},
> + {OV5693_REG_8BIT(0x373f), 0x02},
> + {OV5693_REG_8BIT(0x3740), 0x42},
> + {OV5693_REG_8BIT(0x3741), 0x02},
> + {OV5693_REG_8BIT(0x3742), 0x18},
> + {OV5693_REG_8BIT(0x3743), 0x01},
> + {OV5693_REG_8BIT(0x3744), 0x02},
> + {OV5693_REG_8BIT(0x3747), 0x10},
> + {OV5693_REG_8BIT(0x374c), 0x04},
> + {OV5693_REG_8BIT(0x3751), 0xf0},
> + {OV5693_REG_8BIT(0x3752), 0x00},
> + {OV5693_REG_8BIT(0x3753), 0x00},
> + {OV5693_REG_8BIT(0x3754), 0xc0},
> + {OV5693_REG_8BIT(0x3755), 0x00},
> + {OV5693_REG_8BIT(0x3756), 0x1a},
> + {OV5693_REG_8BIT(0x3758), 0x00},
> + {OV5693_REG_8BIT(0x3759), 0x0f},
> + {OV5693_REG_8BIT(0x376b), 0x44},
> + {OV5693_REG_8BIT(0x375c), 0x04},
> + {OV5693_REG_8BIT(0x3774), 0x10},
> + {OV5693_REG_8BIT(0x3776), 0x00},
> + {OV5693_REG_8BIT(0x377f), 0x08},
> + {OV5693_REG_8BIT(0x3780), 0x22},
> + {OV5693_REG_8BIT(0x3781), 0x0c},
> + {OV5693_REG_8BIT(0x3784), 0x2c},
> + {OV5693_REG_8BIT(0x3785), 0x1e},
> + {OV5693_REG_8BIT(0x378f), 0xf5},
> + {OV5693_REG_8BIT(0x3791), 0xb0},
> + {OV5693_REG_8BIT(0x3795), 0x00},
> + {OV5693_REG_8BIT(0x3796), 0x64},
> + {OV5693_REG_8BIT(0x3797), 0x11},
> + {OV5693_REG_8BIT(0x3798), 0x30},
> + {OV5693_REG_8BIT(0x3799), 0x41},
> + {OV5693_REG_8BIT(0x379a), 0x07},
> + {OV5693_REG_8BIT(0x379b), 0xb0},
> + {OV5693_REG_8BIT(0x379c), 0x0c},
> + {OV5693_REG_8BIT(0x3a04), 0x06},
> + {OV5693_REG_8BIT(0x3a05), 0x14},
> + {OV5693_REG_8BIT(0x3e07), 0x20},
> + {OV5693_REG_8BIT(0x4000), 0x08},
> + {OV5693_REG_8BIT(0x4001), 0x04},
> + {OV5693_REG_8BIT(0x4004), 0x08},
> + {OV5693_REG_8BIT(0x4006), 0x20},
> + {OV5693_REG_8BIT(0x4008), 0x24},
> + {OV5693_REG_8BIT(0x4009), 0x10},
> + {OV5693_REG_8BIT(0x4058), 0x00},
> + {OV5693_REG_8BIT(0x4101), 0xb2},
> + {OV5693_REG_8BIT(0x4307), 0x31},
> + {OV5693_REG_8BIT(0x4511), 0x05},
> + {OV5693_REG_8BIT(0x4512), 0x01},
> + {OV5693_REG_8BIT(0x481f), 0x30},
> + {OV5693_REG_8BIT(0x4826), 0x2c},
> + {OV5693_REG_8BIT(0x4d02), 0xfd},
> + {OV5693_REG_8BIT(0x4d03), 0xf5},
> + {OV5693_REG_8BIT(0x4d04), 0x0c},
> + {OV5693_REG_8BIT(0x4d05), 0xcc},
> + {OV5693_REG_8BIT(0x4837), 0x0a},
> + {OV5693_REG_8BIT(0x5003), 0x20},
> + {OV5693_REG_8BIT(0x5013), 0x00},
> + {OV5693_REG_8BIT(0x5842), 0x01},
> + {OV5693_REG_8BIT(0x5843), 0x2b},
> + {OV5693_REG_8BIT(0x5844), 0x01},
> + {OV5693_REG_8BIT(0x5845), 0x92},
> + {OV5693_REG_8BIT(0x5846), 0x01},
> + {OV5693_REG_8BIT(0x5847), 0x8f},
> + {OV5693_REG_8BIT(0x5848), 0x01},
> + {OV5693_REG_8BIT(0x5849), 0x0c},
> + {OV5693_REG_8BIT(0x5e10), 0x0c},
> + {OV5693_REG_8BIT(0x3820), 0x00},
> + {OV5693_REG_8BIT(0x3821), 0x1e},
> + {OV5693_REG_8BIT(0x5041), 0x14}
> +};
> +
> +static const struct ov5693_reg_list ov5693_global_setting = {
> + .num_regs = ARRAY_SIZE(ov5693_global_regs),
> + .regs = ov5693_global_regs,
> +};
> +
> +static const struct v4l2_rect ov5693_default_crop = {
> + .left = OV5693_ACTIVE_START_LEFT,
> + .top = OV5693_ACTIVE_START_TOP,
> + .width = OV5693_ACTIVE_WIDTH,
> + .height = OV5693_ACTIVE_HEIGHT,
> +};
> +
> +static const struct v4l2_mbus_framefmt ov5693_default_fmt = {
> + .width = OV5693_ACTIVE_WIDTH,
> + .height = OV5693_ACTIVE_HEIGHT,
> + .code = MEDIA_BUS_FMT_SBGGR10_1X10,
> +};
> +
> +static const s64 link_freq_menu_items[] = {
> + OV5693_LINK_FREQ_419_2MHZ
> +};
> +
> +static const char * const ov5693_supply_names[] = {
> + "avdd",
> + "dovdd",
> +};
> +
> +static const char * const ov5693_test_pattern_menu[] = {
> + "Disabled",
> + "Random Data",
> + "Colour Bars",
> + "Colour Bars with Rolling Bar"
> +};
> +
> +static const u8 ov5693_test_pattern_bits[] = {
> + 0,
> + OV5693_TEST_PATTERN_ENABLE | OV5693_TEST_PATTERN_RANDOM,
> + OV5693_TEST_PATTERN_ENABLE | OV5693_TEST_PATTERN_BARS,
> + OV5693_TEST_PATTERN_ENABLE | OV5693_TEST_PATTERN_BARS |
> + OV5693_TEST_PATTERN_ROLLING,
> +};
> +
> +/* I2C I/O Operations */
> +
> +static int ov5693_read_reg(struct ov5693_device *ov5693, u32 addr, u32 *value)
> +{
> + struct i2c_client *client = ov5693->client;
> + __be16 reg;
> + u8 val[4];
> + struct i2c_msg msg[] = {
> + {
> + .addr = client->addr,
> + .flags = 0,
> + .len = 2,
> + .buf = (u8 *)®,
> + },
> + {
> + .addr = client->addr,
> + .flags = I2C_M_RD,
> + .buf = (u8 *)&val,
> + },
> + };
> + unsigned int len = ((addr >> OV5693_REG_SIZE_SHIFT) & 3);
> + unsigned int i;
> + int ret;
> +
> + reg = cpu_to_be16(addr & OV5693_REG_ADDR_MASK);
> +
> + msg[1].len = len;
> +
> + ret = i2c_transfer(client->adapter, msg, 2);
> + if (ret < 0) {
> + dev_err(&client->dev, "Failed to read register 0x%04x: %d\n",
> + addr & OV5693_REG_ADDR_MASK, ret);
> + return ret;
> + }
> +
> + *value = 0;
> + for (i = 0; i < len; ++i) {
> + *value <<= 8;
> + *value |= val[i];
> + }
> +
> + return 0;
> +}
> +
> +static void ov5693_write_reg(struct ov5693_device *ov5693, u32 addr, u32 value,
> + int *error)
> +{
> + struct i2c_client *client = ov5693->client;
> + struct {
> + __be16 reg;
> + u8 val[4];
> + } __packed buf;
> + struct i2c_msg msg = {
> + .addr = client->addr,
> + .buf = (u8 *)&buf,
> + };
> + unsigned int len = ((addr >> OV5693_REG_SIZE_SHIFT) & 3);
> + unsigned int i;
> + int ret;
> +
> + if (*error < 0)
> + return;
> +
> + buf.reg = cpu_to_be16(addr & OV5693_REG_ADDR_MASK);
> + for (i = 0; i < len; ++i) {
> + buf.val[len - i - 1] = value & 0xff;
> + value >>= 8;
> + }
> +
> + msg.len = len + 2;
> +
> + ret = i2c_transfer(client->adapter, &msg, 1);
> + if (ret < 0) {
> + dev_err(&client->dev, "Failed to write register 0x%04x: %d\n",
> + addr & OV5693_REG_ADDR_MASK, ret);
> + *error = ret;
> + }
> +}
> +
> +static int ov5693_write_reg_array(struct ov5693_device *ov5693,
> + const struct ov5693_reg_list *reglist)
> +{
> + unsigned int i;
> + int ret = 0;
> +
> + for (i = 0; i < reglist->num_regs; i++)
> + ov5693_write_reg(ov5693, reglist->regs[i].reg,
> + reglist->regs[i].val, &ret);
> +
> + return ret;
> +}
> +
> +static int ov5693_update_bits(struct ov5693_device *ov5693, u32 address,
> + u32 mask, u32 bits)
> +{
> + u32 value = 0;
> + int ret;
> +
> + ret = ov5693_read_reg(ov5693, address, &value);
> + if (ret)
> + return ret;
> +
> + value &= ~mask;
> + value |= bits;
> +
> + ov5693_write_reg(ov5693, address, value, &ret);
> +
> + return ret;
> +}
> +
> +/* V4L2 Controls Functions */
> +
> +static int ov5693_flip_vert_configure(struct ov5693_device *ov5693,
> + bool enable)
> +{
> + u8 bits = OV5693_FORMAT1_FLIP_VERT_ISP_EN |
> + OV5693_FORMAT1_FLIP_VERT_SENSOR_EN;
> + int ret;
> +
> + ret = ov5693_update_bits(ov5693, OV5693_FORMAT1_REG, bits,
> + enable ? bits : 0);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int ov5693_flip_horz_configure(struct ov5693_device *ov5693,
> + bool enable)
> +{
> + u8 bits = OV5693_FORMAT2_FLIP_HORZ_ISP_EN |
> + OV5693_FORMAT2_FLIP_HORZ_SENSOR_EN;
> + int ret;
> +
> + ret = ov5693_update_bits(ov5693, OV5693_FORMAT2_REG, bits,
> + enable ? bits : 0);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int ov5693_get_exposure(struct ov5693_device *ov5693, s32 *value)
> +{
> + u32 exposure;
> + int ret;
> +
> + ret = ov5693_read_reg(ov5693, OV5693_EXPOSURE_CTRL_REG, &exposure);
> + if (ret)
> + return ret;
> +
> + /* The lowest 4 bits are unsupported fractional bits */
> + *value = exposure >> 4;
> +
> + return 0;
> +}
> +
> +static int ov5693_exposure_configure(struct ov5693_device *ov5693,
> + u32 exposure)
> +{
> + int ret = 0;
> +
> + exposure = (exposure << 4) & OV5693_EXPOSURE_CTRL_MASK;
> +
> + ov5693_write_reg(ov5693, OV5693_EXPOSURE_CTRL_REG, exposure, &ret);
> +
> + return ret;
> +}
> +
> +static int ov5693_get_gain(struct ov5693_device *ov5693, u32 *gain)
> +{
> + u32 value;
> + int ret;
> +
> + ret = ov5693_read_reg(ov5693, OV5693_GAIN_CTRL_REG, &value);
> + if (ret)
> + return ret;
> +
> + /* As with exposure, the lowest 4 bits are fractional bits. */
> + *gain = value >> 4;
> +
> + return ret;
> +}
> +
> +static int ov5693_digital_gain_configure(struct ov5693_device *ov5693,
> + u32 gain)
> +{
> + int ret = 0;
> +
> + gain &= OV5693_MWB_GAIN_MASK;
> +
> + ov5693_write_reg(ov5693, OV5693_MWB_RED_GAIN_REG, gain, &ret);
> + ov5693_write_reg(ov5693, OV5693_MWB_GREEN_GAIN_REG, gain, &ret);
> + ov5693_write_reg(ov5693, OV5693_MWB_BLUE_GAIN_REG, gain, &ret);
> +
> + return ret;
> +}
> +
> +static int ov5693_analog_gain_configure(struct ov5693_device *ov5693, u32 gain)
> +{
> + int ret = 0;
> +
> + gain = (gain << 4) & OV5693_GAIN_CTRL_MASK;
> +
> + ov5693_write_reg(ov5693, OV5693_GAIN_CTRL_REG, gain, &ret);
> +
> + return ret;
> +}
> +
> +static int ov5693_vts_configure(struct ov5693_device *ov5693, u32 vblank)
> +{
> + u16 vts = ov5693->mode.format.height + vblank;
> + int ret = 0;
> +
> + ov5693_write_reg(ov5693, OV5693_TIMING_VTS_REG, vts, &ret);
> +
> + return ret;
> +}
> +
> +static int ov5693_test_pattern_configure(struct ov5693_device *ov5693, u32 idx)
> +{
> + int ret = 0;
> +
> + ov5693_write_reg(ov5693, OV5693_TEST_PATTERN_REG,
> + ov5693_test_pattern_bits[idx], &ret);
> +
> + return ret;
> +}
> +
> +static int ov5693_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + struct ov5693_device *ov5693 =
> + container_of(ctrl->handler, struct ov5693_device, ctrls.handler);
> + int ret = 0;
> +
> + /* If VBLANK is altered we need to update exposure to compensate */
> + if (ctrl->id == V4L2_CID_VBLANK) {
> + int exposure_max;
> +
> + exposure_max = ov5693->mode.format.height + ctrl->val -
> + OV5693_INTEGRATION_TIME_MARGIN;
> + __v4l2_ctrl_modify_range(ov5693->ctrls.exposure,
> + ov5693->ctrls.exposure->minimum,
> + exposure_max,
> + ov5693->ctrls.exposure->step,
> + min(ov5693->ctrls.exposure->val,
> + exposure_max));
> + }
> +
> + /* Only apply changes to the controls if the device is powered up */
> + if (!pm_runtime_get_if_in_use(ov5693->dev))
> + return 0;
> +
> + switch (ctrl->id) {
> + case V4L2_CID_EXPOSURE:
> + ret = ov5693_exposure_configure(ov5693, ctrl->val);
> + break;
> + case V4L2_CID_ANALOGUE_GAIN:
> + ret = ov5693_analog_gain_configure(ov5693, ctrl->val);
> + break;
> + case V4L2_CID_DIGITAL_GAIN:
> + ret = ov5693_digital_gain_configure(ov5693, ctrl->val);
> + break;
> + case V4L2_CID_HFLIP:
> + ret = ov5693_flip_horz_configure(ov5693, !!ctrl->val);
> + break;
> + case V4L2_CID_VFLIP:
> + ret = ov5693_flip_vert_configure(ov5693, !!ctrl->val);
> + break;
> + case V4L2_CID_VBLANK:
> + ret = ov5693_vts_configure(ov5693, ctrl->val);
> + break;
> + case V4L2_CID_TEST_PATTERN:
> + ret = ov5693_test_pattern_configure(ov5693, ctrl->val);
> + break;
> + default:
> + ret = -EINVAL;
> + }
> +
> + pm_runtime_put(ov5693->dev);
> +
> + return ret;
> +}
> +
> +static int ov5693_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + struct ov5693_device *ov5693 = container_of(ctrl->handler,
> + struct ov5693_device,
> + ctrls.handler);
> +
> + switch (ctrl->id) {
> + case V4L2_CID_EXPOSURE_ABSOLUTE:
> + return ov5693_get_exposure(ov5693, &ctrl->val);
> + case V4L2_CID_AUTOGAIN:
> + return ov5693_get_gain(ov5693, &ctrl->val);
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static const struct v4l2_ctrl_ops ov5693_ctrl_ops = {
> + .s_ctrl = ov5693_s_ctrl,
> + .g_volatile_ctrl = ov5693_g_volatile_ctrl
> +};
> +
> +/* System Control Functions */
> +
> +static int ov5693_mode_configure(struct ov5693_device *ov5693)
> +{
> + const struct ov5693_mode *mode = &ov5693->mode;
> + int ret = 0;
> +
> + /* Crop Start X */
> + ov5693_write_reg(ov5693, OV5693_CROP_START_X_REG, mode->crop.left,
> + &ret);
> +
> + /* Offset X */
> + ov5693_write_reg(ov5693, OV5693_OFFSET_START_X_REG, 0, &ret);
> +
> + /* Output Size X */
> + ov5693_write_reg(ov5693, OV5693_OUTPUT_SIZE_X_REG, mode->format.width,
> + &ret);
> +
> + /* Crop End X */
> + ov5693_write_reg(ov5693, OV5693_CROP_END_X_REG,
> + mode->crop.left + mode->crop.width, &ret);
> +
> + /* Horizontal Total Size */
> + ov5693_write_reg(ov5693, OV5693_TIMING_HTS_REG, OV5693_FIXED_PPL,
> + &ret);
> +
> + /* Crop Start Y */
> + ov5693_write_reg(ov5693, OV5693_CROP_START_Y_REG, mode->crop.top,
> + &ret);
> +
> + /* Offset Y */
> + ov5693_write_reg(ov5693, OV5693_OFFSET_START_Y_REG, 0, &ret);
> +
> + /* Output Size Y */
> + ov5693_write_reg(ov5693, OV5693_OUTPUT_SIZE_Y_REG, mode->format.height,
> + &ret);
> +
> + /* Crop End Y */
> + ov5693_write_reg(ov5693, OV5693_CROP_END_Y_REG,
> + mode->crop.top + mode->crop.height, &ret);
> +
> + /* Subsample X increase */
> + ov5693_write_reg(ov5693, OV5693_SUB_INC_X_REG,
> + ((mode->inc_x_odd << 4) & 0xf0) | 0x01, &ret);
> + /* Subsample Y increase */
> + ov5693_write_reg(ov5693, OV5693_SUB_INC_Y_REG,
> + ((mode->inc_y_odd << 4) & 0xf0) | 0x01, &ret);
> +
> + if (ret)
> + return ret;
> +
> + /* Binning */
> + ret = ov5693_update_bits(ov5693, OV5693_FORMAT1_REG,
> + OV5693_FORMAT1_VBIN_EN,
> + mode->binning_y ? OV5693_FORMAT1_VBIN_EN : 0);
> + if (ret)
> + return ret;
> +
> + ret = ov5693_update_bits(ov5693, OV5693_FORMAT2_REG,
> + OV5693_FORMAT2_HBIN_EN,
> + mode->binning_x ? OV5693_FORMAT2_HBIN_EN : 0);
> +
> + return ret;
> +}
> +
> +static int ov5693_sw_standby(struct ov5693_device *ov5693, bool standby)
> +{
> + int ret = 0;
> +
> + ov5693_write_reg(ov5693, OV5693_SW_STREAM_REG,
> + standby ? OV5693_STOP_STREAMING :
> + OV5693_START_STREAMING, &ret);
> +
> + return ret;
> +}
> +
> +static int ov5693_sw_reset(struct ov5693_device *ov5693)
> +{
> + int ret = 0;
> +
> + ov5693_write_reg(ov5693, OV5693_SW_RESET_REG, OV5693_SW_RESET, &ret);
> +
> + return ret;
> +}
> +
> +static int ov5693_sensor_init(struct ov5693_device *ov5693)
> +{
> + int ret = 0;
> +
> + ret = ov5693_sw_reset(ov5693);
> + if (ret) {
> + dev_err(ov5693->dev, "software reset error\n");
> + return ret;
> + }
> +
> + ret = ov5693_write_reg_array(ov5693, &ov5693_global_setting);
> + if (ret) {
> + dev_err(ov5693->dev, "global settings error\n");
> + return ret;
> + }
> +
> + ret = ov5693_mode_configure(ov5693);
> + if (ret) {
> + dev_err(ov5693->dev, "mode configure error\n");
> + return ret;
> + }
> +
> + ret = ov5693_sw_standby(ov5693, true);
> + if (ret)
> + dev_err(ov5693->dev, "software standby error\n");
> +
> + return ret;
> +}
> +
> +static void ov5693_sensor_powerdown(struct ov5693_device *ov5693)
> +{
> + gpiod_set_value_cansleep(ov5693->reset, 1);
> + gpiod_set_value_cansleep(ov5693->powerdown, 1);
> +
> + regulator_bulk_disable(OV5693_NUM_SUPPLIES, ov5693->supplies);
> +
> + clk_disable_unprepare(ov5693->clk);
> +}
> +
> +static int ov5693_sensor_powerup(struct ov5693_device *ov5693)
> +{
> + int ret;
> +
> + gpiod_set_value_cansleep(ov5693->reset, 1);
> + gpiod_set_value_cansleep(ov5693->powerdown, 1);
> +
> + ret = clk_prepare_enable(ov5693->clk);
> + if (ret) {
> + dev_err(ov5693->dev, "Failed to enable clk\n");
> + goto fail_power;
> + }
> +
> + ret = regulator_bulk_enable(OV5693_NUM_SUPPLIES, ov5693->supplies);
> + if (ret) {
> + dev_err(ov5693->dev, "Failed to enable regulators\n");
> + goto fail_power;
> + }
> +
> + gpiod_set_value_cansleep(ov5693->powerdown, 0);
> + gpiod_set_value_cansleep(ov5693->reset, 0);
> +
> + usleep_range(5000, 7500);
> +
> + return 0;
> +
> +fail_power:
> + ov5693_sensor_powerdown(ov5693);
> + return ret;
> +}
> +
> +static int __maybe_unused ov5693_sensor_suspend(struct device *dev)
> +{
> + struct v4l2_subdev *sd = dev_get_drvdata(dev);
> + struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
> +
> + ov5693_sensor_powerdown(ov5693);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused ov5693_sensor_resume(struct device *dev)
> +{
> + struct v4l2_subdev *sd = dev_get_drvdata(dev);
> + struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
> + int ret;
> +
> + mutex_lock(&ov5693->lock);
> +
> + ret = ov5693_sensor_powerup(ov5693);
> + if (ret)
> + goto out_unlock;
> +
> + ret = ov5693_sensor_init(ov5693);
> + if (ret) {
> + dev_err(dev, "ov5693 sensor init failure\n");
> + goto err_power;
> + }
> +
> + goto out_unlock;
> +
> +err_power:
> + ov5693_sensor_powerdown(ov5693);
> +out_unlock:
> + mutex_unlock(&ov5693->lock);
> + return ret;
> +}
> +
> +static int ov5693_detect(struct ov5693_device *ov5693)
> +{
> + int ret;
> + u32 id;
> +
> + ret = ov5693_read_reg(ov5693, OV5693_REG_CHIP_ID, &id);
> + if (ret)
> + return ret;
> +
> + if (id != OV5693_CHIP_ID) {
> + dev_err(ov5693->dev, "sensor ID mismatch. Found 0x%04x\n", id);
> + return -ENODEV;
> + }
> +
> + return 0;
> +}
> +
> +/* V4L2 Framework callbacks */
> +
> +static unsigned int __ov5693_calc_vts(u32 height)
> +{
> + /*
> + * We need to set a sensible default VTS for whatever format height we
> + * happen to be given from set_fmt(). This function just targets
> + * an even multiple of 30fps.
> + */
> +
> + unsigned int tgt_fps;
> +
> + tgt_fps = rounddown(OV5693_PIXEL_RATE / OV5693_FIXED_PPL / height, 30);
> +
> + return ALIGN_DOWN(OV5693_PIXEL_RATE / OV5693_FIXED_PPL / tgt_fps, 2);
> +}
> +
> +static struct v4l2_mbus_framefmt *
> +__ov5693_get_pad_format(struct ov5693_device *ov5693,
> + struct v4l2_subdev_state *state,
> + unsigned int pad, enum v4l2_subdev_format_whence which)
> +{
> + switch (which) {
> + case V4L2_SUBDEV_FORMAT_TRY:
> + return v4l2_subdev_get_try_format(&ov5693->sd, state, pad);
> + case V4L2_SUBDEV_FORMAT_ACTIVE:
> + return &ov5693->mode.format;
> + default:
> + return NULL;
> + }
> +}
> +
> +static struct v4l2_rect *
> +__ov5693_get_pad_crop(struct ov5693_device *ov5693,
> + struct v4l2_subdev_state *state,
> + unsigned int pad, enum v4l2_subdev_format_whence which)
> +{
> + switch (which) {
> + case V4L2_SUBDEV_FORMAT_TRY:
> + return v4l2_subdev_get_try_crop(&ov5693->sd, state, pad);
> + case V4L2_SUBDEV_FORMAT_ACTIVE:
> + return &ov5693->mode.crop;
> + }
> +
> + return NULL;
> +}
> +
> +static int ov5693_get_fmt(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + struct v4l2_subdev_format *format)
> +{
> + struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
> +
> + format->format = ov5693->mode.format;
> +
> + return 0;
> +}
> +
> +static int ov5693_set_fmt(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + struct v4l2_subdev_format *format)
> +{
> + struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
> + const struct v4l2_rect *crop;
> + struct v4l2_mbus_framefmt *fmt;
> + unsigned int hratio, vratio;
> + unsigned int width, height;
> + unsigned int hblank;
> + int exposure_max;
> + int ret = 0;
> +
> + crop = __ov5693_get_pad_crop(ov5693, state, format->pad, format->which);
> +
> + /*
> + * Align to two to simplify the binning calculations below, and clamp
> + * the requested format at the crop rectangle
> + */
> + width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
> + OV5693_MIN_CROP_WIDTH, crop->width);
> + height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
> + OV5693_MIN_CROP_HEIGHT, crop->height);
> +
> + /*
> + * We can only support setting either the dimensions of the crop rect
> + * or those dimensions binned (separately) by a factor of two.
> + */
> + hratio = clamp_t(unsigned int,
> + DIV_ROUND_CLOSEST(crop->width, width), 1, 2);
> + vratio = clamp_t(unsigned int,
> + DIV_ROUND_CLOSEST(crop->height, height), 1, 2);
> +
> + fmt = __ov5693_get_pad_format(ov5693, state, format->pad,
> + format->which);
> +
> + fmt->width = crop->width / hratio;
> + fmt->height = crop->height / vratio;
> + fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
> +
> + format->format = *fmt;
> +
> + if (format->which == V4L2_SUBDEV_FORMAT_TRY)
> + return ret;
> +
> + mutex_lock(&ov5693->lock);
> +
> + ov5693->mode.binning_x = hratio > 1 ? true : false;
> + ov5693->mode.inc_x_odd = hratio > 1 ? 3 : 1;
> + ov5693->mode.binning_y = vratio > 1 ? true : false;
> + ov5693->mode.inc_y_odd = vratio > 1 ? 3 : 1;
> +
> + ov5693->mode.vts = __ov5693_calc_vts(fmt->height);
> +
> + __v4l2_ctrl_modify_range(ov5693->ctrls.vblank,
> + OV5693_TIMING_MIN_VTS,
> + OV5693_TIMING_MAX_VTS - fmt->height,
> + 1, ov5693->mode.vts - fmt->height);
> + __v4l2_ctrl_s_ctrl(ov5693->ctrls.vblank,
> + ov5693->mode.vts - fmt->height);
> +
> + hblank = OV5693_FIXED_PPL - fmt->width;
> + __v4l2_ctrl_modify_range(ov5693->ctrls.hblank, hblank, hblank, 1,
> + hblank);
> +
> + exposure_max = ov5693->mode.vts - OV5693_INTEGRATION_TIME_MARGIN;
> + __v4l2_ctrl_modify_range(ov5693->ctrls.exposure,
> + ov5693->ctrls.exposure->minimum, exposure_max,
> + ov5693->ctrls.exposure->step,
> + min(ov5693->ctrls.exposure->val, exposure_max));
> +
> + mutex_unlock(&ov5693->lock);
> + return ret;
> +}
> +
> +static int ov5693_get_selection(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + struct v4l2_subdev_selection *sel)
> +{
> + struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
> +
> + switch (sel->target) {
> + case V4L2_SEL_TGT_CROP:
> + mutex_lock(&ov5693->lock);
> + sel->r = *__ov5693_get_pad_crop(ov5693, state, sel->pad,
> + sel->which);
> + mutex_unlock(&ov5693->lock);
> + break;
> + case V4L2_SEL_TGT_NATIVE_SIZE:
> + sel->r.top = 0;
> + sel->r.left = 0;
> + sel->r.width = OV5693_NATIVE_WIDTH;
> + sel->r.height = OV5693_NATIVE_HEIGHT;
> + break;
> + case V4L2_SEL_TGT_CROP_BOUNDS:
> + case V4L2_SEL_TGT_CROP_DEFAULT:
> + sel->r.top = OV5693_ACTIVE_START_TOP;
> + sel->r.left = OV5693_ACTIVE_START_LEFT;
> + sel->r.width = OV5693_ACTIVE_WIDTH;
> + sel->r.height = OV5693_ACTIVE_HEIGHT;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int ov5693_set_selection(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + struct v4l2_subdev_selection *sel)
> +{
> + struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
> + struct v4l2_mbus_framefmt *format;
> + struct v4l2_rect *__crop;
> + struct v4l2_rect rect;
> +
> + if (sel->target != V4L2_SEL_TGT_CROP)
> + return -EINVAL;
> +
> + /*
> + * Clamp the boundaries of the crop rectangle to the size of the sensor
> + * pixel array. Align to multiples of 2 to ensure Bayer pattern isn't
> + * disrupted.
> + */
> + rect.left = clamp(ALIGN(sel->r.left, 2), OV5693_NATIVE_START_LEFT,
> + OV5693_NATIVE_WIDTH);
> + rect.top = clamp(ALIGN(sel->r.top, 2), OV5693_NATIVE_START_TOP,
> + OV5693_NATIVE_HEIGHT);
> + rect.width = clamp_t(unsigned int, ALIGN(sel->r.width, 2),
> + OV5693_MIN_CROP_WIDTH, OV5693_NATIVE_WIDTH);
> + rect.height = clamp_t(unsigned int, ALIGN(sel->r.height, 2),
> + OV5693_MIN_CROP_HEIGHT, OV5693_NATIVE_HEIGHT);
> +
> + /* Make sure the crop rectangle isn't outside the bounds of the array */
> + rect.width = min_t(unsigned int, rect.width,
> + OV5693_NATIVE_WIDTH - rect.left);
> + rect.height = min_t(unsigned int, rect.height,
> + OV5693_NATIVE_HEIGHT - rect.top);
> +
> + __crop = __ov5693_get_pad_crop(ov5693, state, sel->pad, sel->which);
> +
> + if (rect.width != __crop->width || rect.height != __crop->height) {
> + /*
> + * Reset the output image size if the crop rectangle size has
> + * been modified.
> + */
> + format = __ov5693_get_pad_format(ov5693, state, sel->pad,
> + sel->which);
> + format->width = rect.width;
> + format->height = rect.height;
> + }
> +
> + *__crop = rect;
> + sel->r = rect;
> +
> + return 0;
> +}
> +
> +static int ov5693_s_stream(struct v4l2_subdev *sd, int enable)
> +{
> + struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
> + int ret;
> +
> + if (enable) {
> + ret = pm_runtime_get_sync(ov5693->dev);
> + if (ret < 0)
> + goto err_power_down;
> +
> + ret = __v4l2_ctrl_handler_setup(&ov5693->ctrls.handler);
This should be v4l2_ctrl_handler_setup(), or call it with the lock taken
(you're acquiring it below anyway).
> + if (ret)
> + goto err_power_down;
> + }
> +
> + mutex_lock(&ov5693->lock);
> + ret = ov5693_sw_standby(ov5693, enable);
> + mutex_unlock(&ov5693->lock);
> +
> + if (ret)
> + goto err_power_down;
> + ov5693->streaming = !!enable;
> +
> + if (!enable)
> + pm_runtime_put(ov5693->dev);
> +
> + return 0;
> +err_power_down:
> + pm_runtime_put_noidle(ov5693->dev);
> + return ret;
> +}
> +
> +static int ov5693_g_frame_interval(struct v4l2_subdev *sd,
> + struct v4l2_subdev_frame_interval *interval)
> +{
> + struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
> + unsigned int framesize = OV5693_FIXED_PPL * (ov5693->mode.format.height +
> + ov5693->ctrls.vblank->val);
> + unsigned int fps = DIV_ROUND_CLOSEST(OV5693_PIXEL_RATE, framesize);
> +
> + interval->interval.numerator = 1;
> + interval->interval.denominator = fps;
> +
> + return 0;
> +}
> +
> +static int ov5693_enum_mbus_code(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + struct v4l2_subdev_mbus_code_enum *code)
> +{
> + /* Only a single mbus format is supported */
> + if (code->index > 0)
> + return -EINVAL;
> +
> + code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
> + return 0;
> +}
> +
> +static int ov5693_enum_frame_size(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state,
> + struct v4l2_subdev_frame_size_enum *fse)
> +{
> + struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
> + struct v4l2_rect *__crop;
> +
> + if (fse->index > 1 || fse->code != MEDIA_BUS_FMT_SBGGR10_1X10)
> + return -EINVAL;
> +
> + __crop = __ov5693_get_pad_crop(ov5693, state, fse->pad, fse->which);
> + if (!__crop)
> + return -EINVAL;
> +
> + fse->min_width = __crop->width / (fse->index + 1);
> + fse->min_height = __crop->height / (fse->index + 1);
> + fse->max_width = fse->min_width;
> + fse->max_height = fse->min_height;
> +
> + return 0;
> +}
> +
> +static const struct v4l2_subdev_video_ops ov5693_video_ops = {
> + .s_stream = ov5693_s_stream,
> + .g_frame_interval = ov5693_g_frame_interval,
> +};
> +
> +static const struct v4l2_subdev_pad_ops ov5693_pad_ops = {
> + .enum_mbus_code = ov5693_enum_mbus_code,
> + .enum_frame_size = ov5693_enum_frame_size,
> + .get_fmt = ov5693_get_fmt,
> + .set_fmt = ov5693_set_fmt,
> + .get_selection = ov5693_get_selection,
> + .set_selection = ov5693_set_selection,
> +};
> +
> +static const struct v4l2_subdev_ops ov5693_ops = {
> + .video = &ov5693_video_ops,
> + .pad = &ov5693_pad_ops,
> +};
> +
> +/* Sensor and Driver Configuration Functions */
> +
> +static int ov5693_init_controls(struct ov5693_device *ov5693)
> +{
> + const struct v4l2_ctrl_ops *ops = &ov5693_ctrl_ops;
> + struct ov5693_v4l2_ctrls *ctrls = &ov5693->ctrls;
> + struct v4l2_fwnode_device_properties props;
> + int vblank_max, vblank_def;
> + int exposure_max;
> + int hblank;
> + int ret;
> +
> + ret = v4l2_ctrl_handler_init(&ctrls->handler, 12);
> + if (ret)
> + return ret;
> +
> + /* link freq */
> + ctrls->link_freq = v4l2_ctrl_new_int_menu(&ctrls->handler,
> + NULL, V4L2_CID_LINK_FREQ,
> + 0, 0, link_freq_menu_items);
> + if (ctrls->link_freq)
> + ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> +
> + /* pixel rate */
> + ctrls->pixel_rate = v4l2_ctrl_new_std(&ctrls->handler, NULL,
> + V4L2_CID_PIXEL_RATE, 0,
> + OV5693_PIXEL_RATE, 1,
> + OV5693_PIXEL_RATE);
> +
> + /* Exposure */
> + exposure_max = ov5693->mode.vts - OV5693_INTEGRATION_TIME_MARGIN;
> + ctrls->exposure = v4l2_ctrl_new_std(&ctrls->handler, ops,
> + V4L2_CID_EXPOSURE,
> + OV5693_EXPOSURE_MIN, exposure_max,
> + OV5693_EXPOSURE_STEP, exposure_max);
> +
> + /* Gain */
> + ctrls->analogue_gain = v4l2_ctrl_new_std(&ctrls->handler,
> + ops, V4L2_CID_ANALOGUE_GAIN,
> + OV5693_GAIN_MIN,
> + OV5693_GAIN_MAX,
> + OV5693_GAIN_STEP,
> + OV5693_GAIN_DEF);
> +
> + ctrls->digital_gain = v4l2_ctrl_new_std(&ctrls->handler, ops,
> + V4L2_CID_DIGITAL_GAIN,
> + OV5693_DIGITAL_GAIN_MIN,
> + OV5693_DIGITAL_GAIN_MAX,
> + OV5693_DIGITAL_GAIN_STEP,
> + OV5693_DIGITAL_GAIN_DEF);
> +
> + /* Flip */
> + ctrls->hflip = v4l2_ctrl_new_std(&ctrls->handler, ops,
> + V4L2_CID_HFLIP, 0, 1, 1, 0);
> +
> + ctrls->vflip = v4l2_ctrl_new_std(&ctrls->handler, ops,
> + V4L2_CID_VFLIP, 0, 1, 1, 0);
> +
> + hblank = OV5693_FIXED_PPL - ov5693->mode.format.width;
> + ctrls->hblank = v4l2_ctrl_new_std(&ctrls->handler, ops,
> + V4L2_CID_HBLANK, hblank,
> + hblank, 1, hblank);
> +
> + if (ctrls->hblank)
> + ctrls->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> +
> + vblank_max = OV5693_TIMING_MAX_VTS - ov5693->mode.format.height;
> + vblank_def = ov5693->mode.vts - ov5693->mode.format.height;
> + ctrls->vblank = v4l2_ctrl_new_std(&ctrls->handler, ops,
> + V4L2_CID_VBLANK,
> + OV5693_TIMING_MIN_VTS,
> + vblank_max, 1, vblank_def);
> +
> + ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(
> + &ctrls->handler, ops,
> + V4L2_CID_TEST_PATTERN,
> + ARRAY_SIZE(ov5693_test_pattern_menu) - 1,
> + 0, 0, ov5693_test_pattern_menu);
> +
> + if (ctrls->handler.error) {
> + dev_err(ov5693->dev, "Error initialising v4l2 ctrls\n");
> + ret = ctrls->handler.error;
> + goto err_free_handler;
> + }
> +
> + /* set properties from fwnode (e.g. rotation, orientation) */
> + ret = v4l2_fwnode_device_parse(ov5693->dev, &props);
> + if (ret)
> + goto err_free_handler;
> +
> + ret = v4l2_ctrl_new_fwnode_properties(&ctrls->handler, ops,
> + &props);
> + if (ret)
> + goto err_free_handler;
> +
> + /* Use same lock for controls as for everything else. */
> + ctrls->handler.lock = &ov5693->lock;
> + ov5693->sd.ctrl_handler = &ctrls->handler;
> +
> + return 0;
> +
> +err_free_handler:
> + v4l2_ctrl_handler_free(&ctrls->handler);
> + return ret;
> +}
> +
> +static int ov5693_configure_gpios(struct ov5693_device *ov5693)
> +{
> + ov5693->reset = devm_gpiod_get_optional(ov5693->dev, "reset",
> + GPIOD_OUT_HIGH);
> + if (IS_ERR(ov5693->reset)) {
> + dev_err(ov5693->dev, "Error fetching reset GPIO\n");
> + return PTR_ERR(ov5693->reset);
> + }
> +
> + ov5693->powerdown = devm_gpiod_get_optional(ov5693->dev, "powerdown",
> + GPIOD_OUT_HIGH);
> + if (IS_ERR(ov5693->powerdown)) {
> + dev_err(ov5693->dev, "Error fetching powerdown GPIO\n");
> + return PTR_ERR(ov5693->powerdown);
> + }
> +
> + return 0;
> +}
> +
> +static int ov5693_get_regulators(struct ov5693_device *ov5693)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < OV5693_NUM_SUPPLIES; i++)
> + ov5693->supplies[i].supply = ov5693_supply_names[i];
> +
> + return devm_regulator_bulk_get(ov5693->dev, OV5693_NUM_SUPPLIES,
> + ov5693->supplies);
> +}
> +
> +static int ov5693_check_hwcfg(struct ov5693_device *ov5693)
> +{
> + struct fwnode_handle *fwnode = dev_fwnode(ov5693->dev);
> + struct v4l2_fwnode_endpoint bus_cfg = { };
> + struct fwnode_handle *endpoint;
> + unsigned int i;
> + int ret;
> +
> + endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL);
> + if (!endpoint)
> + return -EPROBE_DEFER; /* Could be provided by cio2-bridge */
> +
> + bus_cfg.bus_type = V4L2_MBUS_CSI2_DPHY;
You could assign this in variable initialisation.
> +
> + ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
> + fwnode_handle_put(endpoint);
> + if (ret)
> + return ret;
> +
> + if (bus_cfg.bus.mipi_csi2.num_data_lanes != 2) {
> + dev_err(ov5693->dev, "only a 2-lane CSI2 config is supported");
> + ret = -EINVAL;
> + goto out_free_bus_cfg;
> + }
> +
> + if (!bus_cfg.nr_of_link_frequencies) {
> + dev_err(ov5693->dev, "no link frequencies defined\n");
> + ret = -EINVAL;
> + goto out_free_bus_cfg;
> + }
> +
> + for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
> + if (bus_cfg.link_frequencies[i] == OV5693_LINK_FREQ_419_2MHZ)
> + break;
> +
> + if (i == bus_cfg.nr_of_link_frequencies) {
> + dev_err(ov5693->dev, "supported link freq %ull not found\n",
> + OV5693_LINK_FREQ_419_2MHZ);
> + ret = -EINVAL;
> + goto out_free_bus_cfg;
> + }
> +
> +out_free_bus_cfg:
> + v4l2_fwnode_endpoint_free(&bus_cfg);
> +
> + return ret;
> +}
> +
> +static int ov5693_probe(struct i2c_client *client)
> +{
> + struct ov5693_device *ov5693;
> + u32 clk_rate;
> + int ret = 0;
> +
> + ov5693 = devm_kzalloc(&client->dev, sizeof(*ov5693), GFP_KERNEL);
> + if (!ov5693)
> + return -ENOMEM;
> +
> + ov5693->client = client;
> + ov5693->dev = &client->dev;
> +
> + ret = ov5693_check_hwcfg(ov5693);
> + if (ret)
> + return ret;
> +
> + mutex_init(&ov5693->lock);
> +
> + v4l2_i2c_subdev_init(&ov5693->sd, client, &ov5693_ops);
> +
> + ov5693->clk = devm_clk_get(&client->dev, "xvclk");
> + if (IS_ERR(ov5693->clk)) {
> + dev_err(&client->dev, "Error getting clock\n");
> + return PTR_ERR(ov5693->clk);
> + }
> +
> + clk_rate = clk_get_rate(ov5693->clk);
> + if (clk_rate != OV5693_XVCLK_FREQ)
> + dev_warn(&client->dev, "Found clk freq %u, expected %u\n",
> + clk_rate, OV5693_XVCLK_FREQ);
> +
> + ret = ov5693_configure_gpios(ov5693);
> + if (ret)
> + return ret;
> +
> + ret = ov5693_get_regulators(ov5693);
> + if (ret) {
> + dev_err(&client->dev, "Error fetching regulators\n");
> + return ret;
> + }
> +
> + ov5693->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> + ov5693->pad.flags = MEDIA_PAD_FL_SOURCE;
> + ov5693->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> +
> + ov5693->mode.crop = ov5693_default_crop;
> + ov5693->mode.format = ov5693_default_fmt;
> + ov5693->mode.vts = __ov5693_calc_vts(ov5693->mode.format.height);
> +
> + ret = ov5693_init_controls(ov5693);
> + if (ret)
> + return ret;
> +
> + ret = media_entity_pads_init(&ov5693->sd.entity, 1, &ov5693->pad);
> + if (ret)
> + goto err_ctrl_handler_free;
> +
> + /*
> + * We need the driver to work in the event that pm runtime is disable in
> + * the kernel, so power up and verify the chip now. In the event that
> + * runtime pm is disabled this will leave the chip on, so that streaming
> + * will work.
> + */
> +
> + ret = ov5693_sensor_powerup(ov5693);
> + if (ret)
> + goto err_media_entity_cleanup;
> +
> + ret = ov5693_detect(ov5693);
> + if (ret)
> + goto err_powerdown;
> +
> + pm_runtime_set_active(&client->dev);
> + pm_runtime_get_noresume(&client->dev);
> + pm_runtime_enable(&client->dev);
> +
> + ret = v4l2_async_register_subdev_sensor(&ov5693->sd);
> + if (ret) {
> + dev_err(&client->dev, "failed to register V4L2 subdev: %d",
> + ret);
> + goto err_pm_runtime;
> + }
> +
> + pm_runtime_set_autosuspend_delay(&client->dev, 1000);
> + pm_runtime_use_autosuspend(&client->dev);
> + pm_runtime_put_autosuspend(&client->dev);
> +
> + return ret;
> +
> +err_pm_runtime:
> + pm_runtime_disable(&client->dev);
> + pm_runtime_put_noidle(&client->dev);
> +err_powerdown:
> + ov5693_sensor_powerdown(ov5693);
> +err_media_entity_cleanup:
> + media_entity_cleanup(&ov5693->sd.entity);
> +err_ctrl_handler_free:
> + v4l2_ctrl_handler_free(&ov5693->ctrls.handler);
> +
> + return ret;
> +}
> +
> +static int ov5693_remove(struct i2c_client *client)
> +{
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
> +
> + v4l2_async_unregister_subdev(sd);
> + media_entity_cleanup(&ov5693->sd.entity);
> + v4l2_ctrl_handler_free(&ov5693->ctrls.handler);
> + mutex_destroy(&ov5693->lock);
> +
> + /*
> + * Disable runtime PM. In case runtime PM is disabled in the kernel,
> + * make sure to turn power off manually.
> + */
> + pm_runtime_disable(&client->dev);
> + if (!pm_runtime_status_suspended(&client->dev))
> + ov5693_sensor_powerdown(ov5693);
> + pm_runtime_set_suspended(&client->dev);
> +
> + return 0;
> +}
> +
> +static const struct dev_pm_ops ov5693_pm_ops = {
> + SET_RUNTIME_PM_OPS(ov5693_sensor_suspend, ov5693_sensor_resume, NULL)
> +};
> +
> +static const struct acpi_device_id ov5693_acpi_match[] = {
> + {"INT33BE"},
> + {},
> +};
> +MODULE_DEVICE_TABLE(acpi, ov5693_acpi_match);
> +
> +static struct i2c_driver ov5693_driver = {
> + .driver = {
> + .name = "ov5693",
> + .acpi_match_table = ov5693_acpi_match,
> + .pm = &ov5693_pm_ops,
> + },
> + .probe_new = ov5693_probe,
> + .remove = ov5693_remove,
> +};
> +module_i2c_driver(ov5693_driver);
> +
> +MODULE_DESCRIPTION("A low-level driver for OmniVision 5693 sensors");
> +MODULE_LICENSE("GPL");
--
Kind regards,
Sakari Ailus
