Re: [PATCH v3 3/6] media: imx335: Use V4L2 CCI for accessing sensor registers

From: Kieran Bingham
Date: Tue Mar 26 2024 - 07:24:07 EST

Quoting Umang Jain (2024-03-19 07:27:09)
> Use the new comon CCI register access helpers to replace the private

s/comon/common/

> register access helpers in the imx335 driver.
>

It also helps improve readability of the driver.

> Select V4L2_CCI_I2C Kconfig option which the imx335 driver now
> depends on.
>
> Signed-off-by: Umang Jain <umang.jain@xxxxxxxxxxxxxxxx>

Some of the register values written could be broken out into enum
defniitions or BIT() fields I think - but that can just as well be on
top. I think this already helps, and perhaps later we can look at
breaking out the register tables to functions for more flexible
configurations which would be a better time to add the register value
definitions.

As this patch preserves the way the driver writes to the device, and
keeps the values I think that actually helps clearly track the change in
the patch.

Reviewed-by: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>

> ---
> drivers/media/i2c/Kconfig | 1 +
> drivers/media/i2c/imx335.c | 593 ++++++++++++++++---------------------
> 2 files changed, 263 insertions(+), 331 deletions(-)
>
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index e4da68835683..c1f6d882efae 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -205,6 +205,7 @@ config VIDEO_IMX334
> config VIDEO_IMX335
> tristate "Sony IMX335 sensor support"
> depends on OF_GPIO
> + select V4L2_CCI_I2C
> help
> This is a Video4Linux2 sensor driver for the Sony
> IMX335 camera.
> diff --git a/drivers/media/i2c/imx335.c b/drivers/media/i2c/imx335.c
> index b8cf85984127..ae4341644a84 100644
> --- a/drivers/media/i2c/imx335.c
> +++ b/drivers/media/i2c/imx335.c
> @@ -11,62 +11,104 @@
> #include <linux/i2c.h>
> #include <linux/module.h>
> #include <linux/pm_runtime.h>
> +#include <linux/regmap.h>
>
> +#include <media/v4l2-cci.h>
> #include <media/v4l2-ctrls.h>
> #include <media/v4l2-fwnode.h>
> #include <media/v4l2-subdev.h>
>
> /* Streaming Mode */
> -#define IMX335_REG_MODE_SELECT 0x3000
> -#define IMX335_MODE_STANDBY 0x01
> -#define IMX335_MODE_STREAMING 0x00
> +#define IMX335_REG_MODE_SELECT CCI_REG8(0x3000)
> +#define IMX335_MODE_STANDBY 0x01
> +#define IMX335_MODE_STREAMING 0x00
>
> -/* Data Lanes */
> -#define IMX335_LANEMODE 0x3a01
> -#define IMX335_2LANE 1
> -#define IMX335_4LANE 3
> +/* Group hold register */
> +#define IMX335_REG_HOLD CCI_REG8(0x3001)
> +
> +#define IMX335_REG_MASTER_MODE CCI_REG8(0x3002)
> +#define IMX335_REG_BCWAIT_TIME CCI_REG8(0x300c)
> +#define IMX335_REG_CPWAIT_TIME CCI_REG8(0x300d)
> +#define IMX335_REG_WINMODE CCI_REG8(0x3018)
> +#define IMX335_REG_HTRIMMING_START CCI_REG16_LE(0x302c)
> +#define IMX335_REG_HNUM CCI_REG8(0x302e)
>
> /* Lines per frame */
> -#define IMX335_REG_LPFR 0x3030
> +#define IMX335_REG_VMAX CCI_REG24_LE(0x3030)
>
> -/* Chip ID */
> -#define IMX335_REG_ID 0x3912
> -#define IMX335_ID 0x00
> +#define IMX335_REG_OPB_SIZE_V CCI_REG8(0x304c)
> +#define IMX335_REG_ADBIT CCI_REG8(0x3050)
> +#define IMX335_REG_Y_OUT_SIZE CCI_REG16_LE(0x3056)
>
> -/* Exposure control */
> -#define IMX335_REG_SHUTTER 0x3058
> -#define IMX335_EXPOSURE_MIN 1
> -#define IMX335_EXPOSURE_OFFSET 9
> -#define IMX335_EXPOSURE_STEP 1
> -#define IMX335_EXPOSURE_DEFAULT 0x0648
> +#define IMX335_REG_SHUTTER CCI_REG24_LE(0x3058)
> +#define IMX335_EXPOSURE_MIN 1
> +#define IMX335_EXPOSURE_OFFSET 9
> +#define IMX335_EXPOSURE_STEP 1
> +#define IMX335_EXPOSURE_DEFAULT 0x0648
>
> -/* Analog gain control */
> -#define IMX335_REG_AGAIN 0x30e8
> -#define IMX335_AGAIN_MIN 0
> -#define IMX335_AGAIN_MAX 240
> -#define IMX335_AGAIN_STEP 1
> -#define IMX335_AGAIN_DEFAULT 0
> +#define IMX335_REG_AREA3_ST_ADR_1 CCI_REG16_LE(0x3074)
> +#define IMX335_REG_AREA3_WIDTH_1 CCI_REG16_LE(0x3076)
>
> -/* Group hold register */
> -#define IMX335_REG_HOLD 0x3001
> +/* Analog gain control */
> +#define IMX335_REG_AGAIN CCI_REG8(0x30e8)
> +#define IMX335_AGAIN_MIN 0
> +#define IMX335_AGAIN_MAX 240
> +#define IMX335_AGAIN_STEP 1
> +#define IMX335_AGAIN_DEFAULT 0
> +
> +#define IMX335_REG_TPG_TESTCLKEN CCI_REG8(0x3148)
> +#define IMX335_REG_INCLKSEL1 CCI_REG16_LE(0x314c)
> +#define IMX335_REG_INCLKSEL2 CCI_REG8(0x315a)
> +#define IMX335_REG_INCLKSEL3 CCI_REG8(0x3168)
> +#define IMX335_REG_INCLKSEL4 CCI_REG8(0x316a)
> +#define IMX335_REG_MDBIT CCI_REG8(0x319d)
> +#define IMX335_REG_SYSMODE CCI_REG8(0x319e)
> +
> +#define IMX335_REG_XVS_XHS_DRV CCI_REG8(0x31a1)
>
> /* Test pattern generator */
> -#define IMX335_REG_TPG 0x329e
> -#define IMX335_TPG_ALL_000 0
> -#define IMX335_TPG_ALL_FFF 1
> -#define IMX335_TPG_ALL_555 2
> -#define IMX335_TPG_ALL_AAA 3
> -#define IMX335_TPG_TOG_555_AAA 4
> -#define IMX335_TPG_TOG_AAA_555 5
> -#define IMX335_TPG_TOG_000_555 6
> -#define IMX335_TPG_TOG_555_000 7
> -#define IMX335_TPG_TOG_000_FFF 8
> -#define IMX335_TPG_TOG_FFF_000 9
> -#define IMX335_TPG_H_COLOR_BARS 10
> -#define IMX335_TPG_V_COLOR_BARS 11
> +#define IMX335_REG_TPG_DIG_CLP_MODE CCI_REG8(0x3280)
> +#define IMX335_REG_TPG_EN_DUOUT CCI_REG8(0x329c)
> +#define IMX335_REG_TPG CCI_REG8(0x329e)
> +#define IMX335_REG_TPG_COLORWIDTH CCI_REG8(0x32a0)
> +#define IMX335_REG_TPG_BLKLEVEL CCI_REG16_LE(0x3302)
> +#define IMX335_REG_TPG_WRJ_OPEN CCI_REG8(0x336c)
> +#define IMX335_TPG_ALL_000 0
> +#define IMX335_TPG_ALL_FFF 1
> +#define IMX335_TPG_ALL_555 2
> +#define IMX335_TPG_ALL_AAA 3
> +#define IMX335_TPG_TOG_555_AAA 4
> +#define IMX335_TPG_TOG_AAA_555 5
> +#define IMX335_TPG_TOG_000_555 6
> +#define IMX335_TPG_TOG_555_000 7
> +#define IMX335_TPG_TOG_000_FFF 8
> +#define IMX335_TPG_TOG_FFF_000 9
> +#define IMX335_TPG_H_COLOR_BARS 10
> +#define IMX335_TPG_V_COLOR_BARS 11
> +
> +#define IMX335_REG_ADBIT1 CCI_REG16_LE(0x341c)
> +
> +/* Chip ID */
> +#define IMX335_REG_ID CCI_REG8(0x3912)
> +#define IMX335_ID 0x00
> +
> +/* Data Lanes */
> +#define IMX335_REG_LANEMODE CCI_REG8(0x3a01)
> +#define IMX335_2LANE 1
> +#define IMX335_4LANE 3
> +
> +#define IMX335_REG_TCLKPOST CCI_REG16_LE(0x3a18)
> +#define IMX335_REG_TCLKPREPARE CCI_REG16_LE(0x3a1a)
> +#define IMX335_REG_TCLK_TRAIL CCI_REG16_LE(0x3a1c)
> +#define IMX335_REG_TCLK_ZERO CCI_REG16_LE(0x3a1e)
> +#define IMX335_REG_THS_PREPARE CCI_REG16_LE(0x3a20)
> +#define IMX335_REG_THS_ZERO CCI_REG16_LE(0x3a22)
> +#define IMX335_REG_THS_TRAIL CCI_REG16_LE(0x3a24)
> +#define IMX335_REG_THS_EXIT CCI_REG16_LE(0x3a26)
> +#define IMX335_REG_TPLX CCI_REG16_LE(0x3a28)
>
> /* Input clock rate */
> -#define IMX335_INCLK_RATE 24000000
> +#define IMX335_INCLK_RATE 24000000
>
> /* CSI2 HW configuration */
> #define IMX335_LINK_FREQ_594MHz 594000000LL
> @@ -74,9 +116,6 @@
>
> #define IMX335_NUM_DATA_LANES 4
>
> -#define IMX335_REG_MIN 0x00
> -#define IMX335_REG_MAX 0xfffff
> -
> /* IMX335 native and active pixel array size. */
> #define IMX335_NATIVE_WIDTH 2616U
> #define IMX335_NATIVE_HEIGHT 1964U
> @@ -85,16 +124,6 @@
> #define IMX335_PIXEL_ARRAY_WIDTH 2592U
> #define IMX335_PIXEL_ARRAY_HEIGHT 1944U
>
> -/**
> - * struct imx335_reg - imx335 sensor register
> - * @address: Register address
> - * @val: Register value
> - */
> -struct imx335_reg {
> - u16 address;
> - u8 val;
> -};
> -
> /**
> * struct imx335_reg_list - imx335 sensor register list
> * @num_of_regs: Number of registers in the list
> @@ -102,7 +131,7 @@ struct imx335_reg {
> */
> struct imx335_reg_list {
> u32 num_of_regs;
> - const struct imx335_reg *regs;
> + const struct cci_reg_sequence *regs;
> };
>
> static const char * const imx335_supply_name[] = {
> @@ -165,6 +194,7 @@ struct imx335 {
> struct media_pad pad;
> struct gpio_desc *reset_gpio;
> struct regulator_bulk_data supplies[ARRAY_SIZE(imx335_supply_name)];
> + struct regmap *cci;
>
> struct clk *inclk;
> struct v4l2_ctrl_handler ctrl_handler;
> @@ -217,140 +247,135 @@ static const int imx335_tpg_val[] = {
> };
>
> /* Sensor mode registers */
> -static const struct imx335_reg mode_2592x1940_regs[] = {
> - {0x3000, 0x01},
> - {0x3002, 0x00},
> - {0x3018, 0x04},
> - {0x302c, 0x3c},
> - {0x302e, 0x20},
> - {0x3056, 0x94},
> - {0x3074, 0xc8},
> - {0x3076, 0x28},
> - {0x304c, 0x00},
> - {0x31a1, 0x00},
> - {0x3288, 0x21},
> - {0x328a, 0x02},
> - {0x3414, 0x05},
> - {0x3416, 0x18},
> - {0x3648, 0x01},
> - {0x364a, 0x04},
> - {0x364c, 0x04},
> - {0x3678, 0x01},
> - {0x367c, 0x31},
> - {0x367e, 0x31},
> - {0x3706, 0x10},
> - {0x3708, 0x03},
> - {0x3714, 0x02},
> - {0x3715, 0x02},
> - {0x3716, 0x01},
> - {0x3717, 0x03},
> - {0x371c, 0x3d},
> - {0x371d, 0x3f},
> - {0x372c, 0x00},
> - {0x372d, 0x00},
> - {0x372e, 0x46},
> - {0x372f, 0x00},
> - {0x3730, 0x89},
> - {0x3731, 0x00},
> - {0x3732, 0x08},
> - {0x3733, 0x01},
> - {0x3734, 0xfe},
> - {0x3735, 0x05},
> - {0x3740, 0x02},
> - {0x375d, 0x00},
> - {0x375e, 0x00},
> - {0x375f, 0x11},
> - {0x3760, 0x01},
> - {0x3768, 0x1b},
> - {0x3769, 0x1b},
> - {0x376a, 0x1b},
> - {0x376b, 0x1b},
> - {0x376c, 0x1a},
> - {0x376d, 0x17},
> - {0x376e, 0x0f},
> - {0x3776, 0x00},
> - {0x3777, 0x00},
> - {0x3778, 0x46},
> - {0x3779, 0x00},
> - {0x377a, 0x89},
> - {0x377b, 0x00},
> - {0x377c, 0x08},
> - {0x377d, 0x01},
> - {0x377e, 0x23},
> - {0x377f, 0x02},
> - {0x3780, 0xd9},
> - {0x3781, 0x03},
> - {0x3782, 0xf5},
> - {0x3783, 0x06},
> - {0x3784, 0xa5},
> - {0x3788, 0x0f},
> - {0x378a, 0xd9},
> - {0x378b, 0x03},
> - {0x378c, 0xeb},
> - {0x378d, 0x05},
> - {0x378e, 0x87},
> - {0x378f, 0x06},
> - {0x3790, 0xf5},
> - {0x3792, 0x43},
> - {0x3794, 0x7a},
> - {0x3796, 0xa1},
> - {0x37b0, 0x36},
> - {0x3a00, 0x00},
> +static const struct cci_reg_sequence mode_2592x1940_regs[] = {
> + {IMX335_REG_MODE_SELECT, 0x01},
> + {IMX335_REG_MASTER_MODE, 0x00},
> + {IMX335_REG_WINMODE, 0x04},
> + {IMX335_REG_HTRIMMING_START, 0x0180},
> + {IMX335_REG_HNUM, 0x0a20},
> + {IMX335_REG_Y_OUT_SIZE, 0x0794},
> + {IMX335_REG_AREA3_ST_ADR_1, 0x00b0},
> + {IMX335_REG_AREA3_WIDTH_1, 0x0f58},
> + {IMX335_REG_OPB_SIZE_V, 0x00},
> + {IMX335_REG_XVS_XHS_DRV, 0x00},
> + {CCI_REG8(0x3288), 0x21}, /* undocumented */
> + {CCI_REG8(0x328a), 0x02}, /* undocumented */
> + {CCI_REG8(0x3414), 0x05}, /* undocumented */
> + {CCI_REG8(0x3416), 0x18}, /* undocumented */
> + {CCI_REG8(0x3648), 0x01}, /* undocumented */
> + {CCI_REG8(0x364a), 0x04}, /* undocumented */
> + {CCI_REG8(0x364c), 0x04}, /* undocumented */
> + {CCI_REG8(0x3678), 0x01}, /* undocumented */
> + {CCI_REG8(0x367c), 0x31}, /* undocumented */
> + {CCI_REG8(0x367e), 0x31}, /* undocumented */
> + {CCI_REG8(0x3706), 0x10}, /* undocumented */
> + {CCI_REG8(0x3708), 0x03}, /* undocumented */
> + {CCI_REG8(0x3714), 0x02}, /* undocumented */
> + {CCI_REG8(0x3715), 0x02}, /* undocumented */
> + {CCI_REG8(0x3716), 0x01}, /* undocumented */
> + {CCI_REG8(0x3717), 0x03}, /* undocumented */
> + {CCI_REG8(0x371c), 0x3d}, /* undocumented */
> + {CCI_REG8(0x371d), 0x3f}, /* undocumented */
> + {CCI_REG8(0x372c), 0x00}, /* undocumented */
> + {CCI_REG8(0x372d), 0x00}, /* undocumented */
> + {CCI_REG8(0x372e), 0x46}, /* undocumented */
> + {CCI_REG8(0x372f), 0x00}, /* undocumented */
> + {CCI_REG8(0x3730), 0x89}, /* undocumented */
> + {CCI_REG8(0x3731), 0x00}, /* undocumented */
> + {CCI_REG8(0x3732), 0x08}, /* undocumented */
> + {CCI_REG8(0x3733), 0x01}, /* undocumented */
> + {CCI_REG8(0x3734), 0xfe}, /* undocumented */
> + {CCI_REG8(0x3735), 0x05}, /* undocumented */
> + {CCI_REG8(0x3740), 0x02}, /* undocumented */
> + {CCI_REG8(0x375d), 0x00}, /* undocumented */
> + {CCI_REG8(0x375e), 0x00}, /* undocumented */
> + {CCI_REG8(0x375f), 0x11}, /* undocumented */
> + {CCI_REG8(0x3760), 0x01}, /* undocumented */
> + {CCI_REG8(0x3768), 0x1b}, /* undocumented */
> + {CCI_REG8(0x3769), 0x1b}, /* undocumented */
> + {CCI_REG8(0x376a), 0x1b}, /* undocumented */
> + {CCI_REG8(0x376b), 0x1b}, /* undocumented */
> + {CCI_REG8(0x376c), 0x1a}, /* undocumented */
> + {CCI_REG8(0x376d), 0x17}, /* undocumented */
> + {CCI_REG8(0x376e), 0x0f}, /* undocumented */
> + {CCI_REG8(0x3776), 0x00}, /* undocumented */
> + {CCI_REG8(0x3777), 0x00}, /* undocumented */
> + {CCI_REG8(0x3778), 0x46}, /* undocumented */
> + {CCI_REG8(0x3779), 0x00}, /* undocumented */
> + {CCI_REG8(0x377a), 0x89}, /* undocumented */
> + {CCI_REG8(0x377b), 0x00}, /* undocumented */
> + {CCI_REG8(0x377c), 0x08}, /* undocumented */
> + {CCI_REG8(0x377d), 0x01}, /* undocumented */
> + {CCI_REG8(0x377e), 0x23}, /* undocumented */
> + {CCI_REG8(0x377f), 0x02}, /* undocumented */
> + {CCI_REG8(0x3780), 0xd9}, /* undocumented */
> + {CCI_REG8(0x3781), 0x03}, /* undocumented */
> + {CCI_REG8(0x3782), 0xf5}, /* undocumented */
> + {CCI_REG8(0x3783), 0x06}, /* undocumented */
> + {CCI_REG8(0x3784), 0xa5}, /* undocumented */
> + {CCI_REG8(0x3788), 0x0f}, /* undocumented */
> + {CCI_REG8(0x378a), 0xd9}, /* undocumented */
> + {CCI_REG8(0x378b), 0x03}, /* undocumented */
> + {CCI_REG8(0x378c), 0xeb}, /* undocumented */
> + {CCI_REG8(0x378d), 0x05}, /* undocumented */
> + {CCI_REG8(0x378e), 0x87}, /* undocumented */
> + {CCI_REG8(0x378f), 0x06}, /* undocumented */
> + {CCI_REG8(0x3790), 0xf5}, /* undocumented */
> + {CCI_REG8(0x3792), 0x43}, /* undocumented */
> + {CCI_REG8(0x3794), 0x7a}, /* undocumented */
> + {CCI_REG8(0x3796), 0xa1}, /* undocumented */
> + {CCI_REG8(0x37b0), 0x36}, /* undocumented */
> + {CCI_REG8(0x3a00), 0x00}, /* undocumented */
> };
>
> -static const struct imx335_reg raw10_framefmt_regs[] = {
> - {0x3050, 0x00},
> - {0x319d, 0x00},
> - {0x341c, 0xff},
> - {0x341d, 0x01},
> +static const struct cci_reg_sequence raw10_framefmt_regs[] = {
> + {IMX335_REG_ADBIT, 0x00},
> + {IMX335_REG_MDBIT, 0x00},
> + {IMX335_REG_ADBIT1, 0x1ff},
> };
>
> -static const struct imx335_reg raw12_framefmt_regs[] = {
> - {0x3050, 0x01},
> - {0x319d, 0x01},
> - {0x341c, 0x47},
> - {0x341d, 0x00},
> +static const struct cci_reg_sequence raw12_framefmt_regs[] = {
> + {IMX335_REG_ADBIT, 0x01},
> + {IMX335_REG_MDBIT, 0x01},
> + {IMX335_REG_ADBIT1, 0x47},
> };
>
> -static const struct imx335_reg mipi_data_rate_1188Mbps[] = {
> - {0x300c, 0x3b},
> - {0x300d, 0x2a},
> - {0x314c, 0xc6},
> - {0x314d, 0x00},
> - {0x315a, 0x02},
> - {0x3168, 0xa0},
> - {0x316a, 0x7e},
> - {0x319e, 0x01},
> - {0x3a18, 0x8f},
> - {0x3a1a, 0x4f},
> - {0x3a1c, 0x47},
> - {0x3a1e, 0x37},
> - {0x3a1f, 0x01},
> - {0x3a20, 0x4f},
> - {0x3a22, 0x87},
> - {0x3a24, 0x4f},
> - {0x3a26, 0x7f},
> - {0x3a28, 0x3f},
> +static const struct cci_reg_sequence mipi_data_rate_1188Mbps[] = {
> + {IMX335_REG_BCWAIT_TIME, 0x3b},
> + {IMX335_REG_CPWAIT_TIME, 0x2a},
> + {IMX335_REG_INCLKSEL1, 0x00c6},
> + {IMX335_REG_INCLKSEL2, 0x02},
> + {IMX335_REG_INCLKSEL3, 0xa0},
> + {IMX335_REG_INCLKSEL4, 0x7e},
> + {IMX335_REG_SYSMODE, 0x01},
> + {IMX335_REG_TCLKPOST, 0x8f},
> + {IMX335_REG_TCLKPREPARE, 0x4f},
> + {IMX335_REG_TCLK_TRAIL, 0x47},
> + {IMX335_REG_TCLK_ZERO, 0x0137},
> + {IMX335_REG_THS_PREPARE, 0x4f},
> + {IMX335_REG_THS_ZERO, 0x87},
> + {IMX335_REG_THS_TRAIL, 0x4f},
> + {IMX335_REG_THS_EXIT, 0x7f},
> + {IMX335_REG_TPLX, 0x3f},
> };
>
> -static const struct imx335_reg mipi_data_rate_891Mbps[] = {
> - {0x300c, 0x3b},
> - {0x300d, 0x2a},
> - {0x314c, 0x29},
> - {0x314d, 0x01},
> - {0x315a, 0x06},
> - {0x3168, 0xa0},
> - {0x316a, 0x7e},
> - {0x319e, 0x02},
> - {0x3a18, 0x7f},
> - {0x3a1a, 0x37},
> - {0x3a1c, 0x37},
> - {0x3a1e, 0xf7},
> - {0x3a20, 0x3f},
> - {0x3a22, 0x6f},
> - {0x3a24, 0x3f},
> - {0x3a26, 0x5f},
> - {0x3a28, 0x2f},
> +static const struct cci_reg_sequence mipi_data_rate_891Mbps[] = {
> + {IMX335_REG_BCWAIT_TIME, 0x3b},
> + {IMX335_REG_CPWAIT_TIME, 0x2a},
> + {IMX335_REG_INCLKSEL1, 0x0129},
> + {IMX335_REG_INCLKSEL2, 0x06},
> + {IMX335_REG_INCLKSEL3, 0xa0},
> + {IMX335_REG_INCLKSEL4, 0x7e},
> + {IMX335_REG_SYSMODE, 0x02},
> + {IMX335_REG_TCLKPOST, 0x7f},
> + {IMX335_REG_TCLKPREPARE, 0x37},
> + {IMX335_REG_TCLK_TRAIL, 0x37},
> + {IMX335_REG_TCLK_ZERO, 0xf7},
> + {IMX335_REG_THS_PREPARE, 0x3f},
> + {IMX335_REG_THS_ZERO, 0x6f},
> + {IMX335_REG_THS_TRAIL, 0x3f},
> + {IMX335_REG_THS_EXIT, 0x5f},
> + {IMX335_REG_TPLX, 0x2f},
> };
>
> static const s64 link_freq[] = {
> @@ -402,101 +427,6 @@ static inline struct imx335 *to_imx335(struct v4l2_subdev *subdev)
> return container_of(subdev, struct imx335, sd);
> }
>
> -/**
> - * imx335_read_reg() - Read registers.
> - * @imx335: pointer to imx335 device
> - * @reg: register address
> - * @len: length of bytes to read. Max supported bytes is 4
> - * @val: pointer to register value to be filled.
> - *
> - * Big endian register addresses with little endian values.
> - *
> - * Return: 0 if successful, error code otherwise.
> - */
> -static int imx335_read_reg(struct imx335 *imx335, u16 reg, u32 len, u32 *val)
> -{
> - struct i2c_client *client = v4l2_get_subdevdata(&imx335->sd);
> - struct i2c_msg msgs[2] = {0};
> - u8 addr_buf[2] = {0};
> - u8 data_buf[4] = {0};
> - int ret;
> -
> - if (WARN_ON(len > 4))
> - return -EINVAL;
> -
> - put_unaligned_be16(reg, addr_buf);
> -
> - /* 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;
> -
> - ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
> - if (ret != ARRAY_SIZE(msgs))
> - return -EIO;
> -
> - *val = get_unaligned_le32(data_buf);
> -
> - return 0;
> -}
> -
> -/**
> - * imx335_write_reg() - Write register
> - * @imx335: pointer to imx335 device
> - * @reg: register address
> - * @len: length of bytes. Max supported bytes is 4
> - * @val: register value
> - *
> - * Big endian register addresses with little endian values.
> - *
> - * Return: 0 if successful, error code otherwise.
> - */
> -static int imx335_write_reg(struct imx335 *imx335, u16 reg, u32 len, u32 val)
> -{
> - struct i2c_client *client = v4l2_get_subdevdata(&imx335->sd);
> - u8 buf[6] = {0};
> -
> - if (WARN_ON(len > 4))
> - return -EINVAL;
> -
> - put_unaligned_be16(reg, buf);
> - put_unaligned_le32(val, buf + 2);
> - if (i2c_master_send(client, buf, len + 2) != len + 2)
> - return -EIO;
> -
> - return 0;
> -}
> -
> -/**
> - * imx335_write_regs() - Write a list of registers
> - * @imx335: pointer to imx335 device
> - * @regs: list of registers to be written
> - * @len: length of registers array
> - *
> - * Return: 0 if successful. error code otherwise.
> - */
> -static int imx335_write_regs(struct imx335 *imx335,
> - const struct imx335_reg *regs, u32 len)
> -{
> - unsigned int i;
> - int ret;
> -
> - for (i = 0; i < len; i++) {
> - ret = imx335_write_reg(imx335, regs[i].address, 1, regs[i].val);
> - if (ret)
> - return ret;
> - }
> -
> - return 0;
> -}
> -
> /**
> * imx335_update_controls() - Update control ranges based on streaming mode
> * @imx335: pointer to imx335 device
> @@ -533,7 +463,8 @@ static int imx335_update_controls(struct imx335 *imx335,
> static int imx335_update_exp_gain(struct imx335 *imx335, u32 exposure, u32 gain)
> {
> u32 lpfr, shutter;
> - int ret;
> + int ret_hold;
> + int ret = 0;
>
> lpfr = imx335->vblank + imx335->cur_mode->height;
> shutter = lpfr - exposure;
> @@ -541,64 +472,55 @@ static int imx335_update_exp_gain(struct imx335 *imx335, u32 exposure, u32 gain)
> dev_dbg(imx335->dev, "Set exp %u, analog gain %u, shutter %u, lpfr %u\n",
> exposure, gain, shutter, lpfr);
>
> - ret = imx335_write_reg(imx335, IMX335_REG_HOLD, 1, 1);
> - if (ret)
> - return ret;
> -
> - ret = imx335_write_reg(imx335, IMX335_REG_LPFR, 3, lpfr);
> - if (ret)
> - goto error_release_group_hold;
> -
> - ret = imx335_write_reg(imx335, IMX335_REG_SHUTTER, 3, shutter);
> - if (ret)
> - goto error_release_group_hold;
> -
> - ret = imx335_write_reg(imx335, IMX335_REG_AGAIN, 2, gain);
> -
> -error_release_group_hold:
> - imx335_write_reg(imx335, IMX335_REG_HOLD, 1, 0);
> + cci_write(imx335->cci, IMX335_REG_HOLD, 1, &ret);
> + cci_write(imx335->cci, IMX335_REG_VMAX, lpfr, &ret);
> + cci_write(imx335->cci, IMX335_REG_SHUTTER, shutter, &ret);
> + cci_write(imx335->cci, IMX335_REG_AGAIN, gain, &ret);
> + /*
> + * Unconditionally attempt to release the hold, but track the
> + * error if the unhold itself fails.
> + */
> + ret_hold = cci_write(imx335->cci, IMX335_REG_HOLD, 0, NULL);
> + if (ret_hold)
> + ret = ret_hold;
>
> return ret;
> }
>
> static int imx335_update_test_pattern(struct imx335 *imx335, u32 pattern_index)
> {
> - int ret;
> + int ret = 0;
>
> if (pattern_index >= ARRAY_SIZE(imx335_tpg_val))
> return -EINVAL;
>
> if (pattern_index) {
> - const struct imx335_reg tpg_enable_regs[] = {
> - { 0x3148, 0x10 },
> - { 0x3280, 0x00 },
> - { 0x329c, 0x01 },
> - { 0x32a0, 0x11 },
> - { 0x3302, 0x00 },
> - { 0x3303, 0x00 },
> - { 0x336c, 0x00 },
> + const struct cci_reg_sequence tpg_enable_regs[] = {
> + {IMX335_REG_TPG_TESTCLKEN, 0x10},
> + {IMX335_REG_TPG_DIG_CLP_MODE, 0x00},
> + {IMX335_REG_TPG_EN_DUOUT, 0x01},
> + {IMX335_REG_TPG_COLORWIDTH, 0x11},
> + {IMX335_REG_TPG_BLKLEVEL, 0x00},
> + {IMX335_REG_TPG_WRJ_OPEN, 0x00},
> };
>
> - ret = imx335_write_reg(imx335, IMX335_REG_TPG, 1,
> - imx335_tpg_val[pattern_index]);
> - if (ret)
> - return ret;
> + cci_write(imx335->cci, IMX335_REG_TPG,
> + imx335_tpg_val[pattern_index], &ret);
>
> - ret = imx335_write_regs(imx335, tpg_enable_regs,
> - ARRAY_SIZE(tpg_enable_regs));
> + cci_multi_reg_write(imx335->cci, tpg_enable_regs,
> + ARRAY_SIZE(tpg_enable_regs), &ret);
> } else {
> - const struct imx335_reg tpg_disable_regs[] = {
> - { 0x3148, 0x00 },
> - { 0x3280, 0x01 },
> - { 0x329c, 0x00 },
> - { 0x32a0, 0x10 },
> - { 0x3302, 0x32 },
> - { 0x3303, 0x00 },
> - { 0x336c, 0x01 },
> + const struct cci_reg_sequence tpg_disable_regs[] = {
> + {IMX335_REG_TPG_TESTCLKEN, 0x00},
> + {IMX335_REG_TPG_DIG_CLP_MODE, 0x01},
> + {IMX335_REG_TPG_EN_DUOUT, 0x00},
> + {IMX335_REG_TPG_COLORWIDTH, 0x10},
> + {IMX335_REG_TPG_BLKLEVEL, 0x32},
> + {IMX335_REG_TPG_WRJ_OPEN, 0x01},
> };
>
> - ret = imx335_write_regs(imx335, tpg_disable_regs,
> - ARRAY_SIZE(tpg_disable_regs));
> + cci_multi_reg_write(imx335->cci, tpg_disable_regs,
> + ARRAY_SIZE(tpg_disable_regs), &ret);
> }
>
> return ret;
> @@ -897,12 +819,14 @@ static int imx335_set_framefmt(struct imx335 *imx335)
> {
> switch (imx335->cur_mbus_code) {
> case MEDIA_BUS_FMT_SRGGB10_1X10:
> - return imx335_write_regs(imx335, raw10_framefmt_regs,
> - ARRAY_SIZE(raw10_framefmt_regs));
> + return cci_multi_reg_write(imx335->cci, raw10_framefmt_regs,
> + ARRAY_SIZE(raw10_framefmt_regs),
> + NULL);
>
> case MEDIA_BUS_FMT_SRGGB12_1X12:
> - return imx335_write_regs(imx335, raw12_framefmt_regs,
> - ARRAY_SIZE(raw12_framefmt_regs));
> + return cci_multi_reg_write(imx335->cci, raw12_framefmt_regs,
> + ARRAY_SIZE(raw12_framefmt_regs),
> + NULL);
> }
>
> return -EINVAL;
> @@ -921,7 +845,8 @@ static int imx335_start_streaming(struct imx335 *imx335)
>
> /* Setup PLL */
> reg_list = &link_freq_reglist[__ffs(imx335->link_freq_bitmap)];
> - ret = imx335_write_regs(imx335, reg_list->regs, reg_list->num_of_regs);
> + ret = cci_multi_reg_write(imx335->cci, reg_list->regs,
> + reg_list->num_of_regs, NULL);
> if (ret) {
> dev_err(imx335->dev, "%s failed to set plls\n", __func__);
> return ret;
> @@ -929,8 +854,8 @@ static int imx335_start_streaming(struct imx335 *imx335)
>
> /* Write sensor mode registers */
> reg_list = &imx335->cur_mode->reg_list;
> - ret = imx335_write_regs(imx335, reg_list->regs,
> - reg_list->num_of_regs);
> + ret = cci_multi_reg_write(imx335->cci, reg_list->regs,
> + reg_list->num_of_regs, NULL);
> if (ret) {
> dev_err(imx335->dev, "fail to write initial registers\n");
> return ret;
> @@ -944,7 +869,8 @@ static int imx335_start_streaming(struct imx335 *imx335)
> }
>
> /* Configure lanes */
> - ret = imx335_write_reg(imx335, IMX335_LANEMODE, 1, imx335->lane_mode);
> + ret = cci_write(imx335->cci, IMX335_REG_LANEMODE,
> + imx335->lane_mode, NULL);
> if (ret)
> return ret;
>
> @@ -956,8 +882,8 @@ static int imx335_start_streaming(struct imx335 *imx335)
> }
>
> /* Start streaming */
> - ret = imx335_write_reg(imx335, IMX335_REG_MODE_SELECT,
> - 1, IMX335_MODE_STREAMING);
> + ret = cci_write(imx335->cci, IMX335_REG_MODE_SELECT,
> + IMX335_MODE_STREAMING, NULL);
> if (ret) {
> dev_err(imx335->dev, "fail to start streaming\n");
> return ret;
> @@ -977,8 +903,8 @@ static int imx335_start_streaming(struct imx335 *imx335)
> */
> static int imx335_stop_streaming(struct imx335 *imx335)
> {
> - return imx335_write_reg(imx335, IMX335_REG_MODE_SELECT,
> - 1, IMX335_MODE_STANDBY);
> + return cci_write(imx335->cci, IMX335_REG_MODE_SELECT,
> + IMX335_MODE_STANDBY, NULL);
> }
>
> /**
> @@ -1029,14 +955,14 @@ static int imx335_set_stream(struct v4l2_subdev *sd, int enable)
> static int imx335_detect(struct imx335 *imx335)
> {
> int ret;
> - u32 val;
> + u64 val;
>
> - ret = imx335_read_reg(imx335, IMX335_REG_ID, 2, &val);
> + ret = cci_read(imx335->cci, IMX335_REG_ID, &val, NULL);
> if (ret)
> return ret;
>
> if (val != IMX335_ID) {
> - dev_err(imx335->dev, "chip id mismatch: %x!=%x\n",
> + dev_err(imx335->dev, "chip id mismatch: %x!=%llx\n",
> IMX335_ID, val);
> return -ENXIO;
> }
> @@ -1337,6 +1263,11 @@ static int imx335_probe(struct i2c_client *client)
> return -ENOMEM;
>
> imx335->dev = &client->dev;
> + imx335->cci = devm_cci_regmap_init_i2c(client, 16);
> + if (IS_ERR(imx335->cci)) {
> + dev_err(imx335->dev, "Unable to initialize I2C\n");
> + return -ENODEV;
> + }
>
> /* Initialize subdev */
> v4l2_i2c_subdev_init(&imx335->sd, client, &imx335_subdev_ops);
> --
> 2.43.0
>