Hi Sakari,
Thanks for the review,
On 5/28/2024 1:49 PM, Sakari Ailus wrote:
> Hi Sylvain,
>
> Thanks for the update. A few more comments below...
>
> On Tue, May 21, 2024 at 06:29:50PM +0200, Sylvain Petinot wrote:
>> Add V4L2 sub-device driver for STMicroelectronics VD56G3 camera sensor.
>> This is a 1.5 M pixel global shutter image sensor with an active array
>> size of 1124 x 1364 (portrait orientation).
>>
>> The driver supports Mono (VD56G3) and Color (VD66GY) variants.
>>
>> Signed-off-by: Sylvain Petinot <sylvain.petinot@xxxxxxxxxxx>
>> ---
>> drivers/media/i2c/Kconfig | 11 +
>> drivers/media/i2c/Makefile | 1 +
>> drivers/media/i2c/st-vd56g3.c | 1608 +++++++++++++++++++++++++++++++++
>> 3 files changed, 1620 insertions(+)
>> create mode 100644 drivers/media/i2c/st-vd56g3.c
>>
>> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
>> index c6d3ee472d81..c3d3cbdfcb3b 100644
>> --- a/drivers/media/i2c/Kconfig
>> +++ b/drivers/media/i2c/Kconfig
>> @@ -659,6 +659,17 @@ config VIDEO_S5K6A3
>> This is a V4L2 sensor driver for Samsung S5K6A3 raw
>> camera sensor.
>>
>> +config VIDEO_ST_VD56G3
>> + tristate "ST VD56G3 sensor support"
>> + select V4L2_CCI_I2C
>> + depends on OF && GPIOLIB
>> + help
>> + This is a Video4Linux2 sensor driver for the ST VD56G3
>> + camera sensor.
>> +
>> + To compile this driver as a module, choose M here: the
>> + module will be called st-vd56g3.
>> +
>> config VIDEO_ST_VGXY61
>> tristate "ST VGXY61 sensor support"
>> select V4L2_CCI_I2C
>> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
>> index dfbe6448b549..b469cf0f8113 100644
>> --- a/drivers/media/i2c/Makefile
>> +++ b/drivers/media/i2c/Makefile
>> @@ -124,6 +124,7 @@ obj-$(CONFIG_VIDEO_SAA717X) += saa717x.o
>> obj-$(CONFIG_VIDEO_SAA7185) += saa7185.o
>> obj-$(CONFIG_VIDEO_SONY_BTF_MPX) += sony-btf-mpx.o
>> obj-$(CONFIG_VIDEO_ST_MIPID02) += st-mipid02.o
>> +obj-$(CONFIG_VIDEO_ST_VD56G3) += st-vd56g3.o
>> obj-$(CONFIG_VIDEO_ST_VGXY61) += st-vgxy61.o
>> obj-$(CONFIG_VIDEO_TC358743) += tc358743.o
>> obj-$(CONFIG_VIDEO_TC358746) += tc358746.o
>> diff --git a/drivers/media/i2c/st-vd56g3.c b/drivers/media/i2c/st-vd56g3.c
>> new file mode 100644
>> index 000000000000..1e4329502230
>> --- /dev/null
>> +++ b/drivers/media/i2c/st-vd56g3.c
>> @@ -0,0 +1,1608 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * A V4L2 driver for ST VD56G3 (Mono) and VD66GY (RGB) global shutter cameras.
>> + * Copyright (C) 2024, STMicroelectronics SA
>> + */
>> +
>> +#include <linux/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/gpio/consumer.h>
>> +#include <linux/i2c.h>
>> +#include <linux/iopoll.h>
>> +#include <linux/module.h>
>> +#include <linux/pm_runtime.h>
>> +#include <linux/regmap.h>
>> +#include <linux/regulator/consumer.h>
>> +#include <linux/units.h>
>> +
>> +#include <asm/unaligned.h>
>> +
>> +#include <media/mipi-csi2.h>
>> +#include <media/v4l2-async.h>
>> +#include <media/v4l2-cci.h>
>> +#include <media/v4l2-ctrls.h>
>> +#include <media/v4l2-device.h>
>> +#include <media/v4l2-event.h>
>> +#include <media/v4l2-fwnode.h>
>> +#include <media/v4l2-subdev.h>
>> +
>> +/* Register Map */
>> +#define VD56G3_REG_MODEL_ID CCI_REG16_LE(0x0000)
>> +#define VD56G3_MODEL_ID 0x5603
>> +#define VD56G3_REG_REVISION CCI_REG16_LE(0x0002)
>> +#define VD56G3_REVISION_CUT3 0x31
>> +#define VD56G3_REG_OPTICAL_REVISION CCI_REG8(0x001a)
>> +#define VD56G3_OPTICAL_REVISION_MONO 0
>> +#define VD56G3_OPTICAL_REVISION_BAYER 1
>> +#define VD56G3_REG_SYSTEM_FSM CCI_REG8(0x0028)
>> +#define VD56G3_SYSTEM_FSM_READY_TO_BOOT 0x01
>> +#define VD56G3_SYSTEM_FSM_SW_STBY 0x02
>> +#define VD56G3_SYSTEM_FSM_STREAMING 0x03
>> +#define VD56G3_REG_APPLIED_COARSE_EXPOSURE CCI_REG16_LE(0x0064)
>> +#define VD56G3_REG_APPLIED_ANALOG_GAIN CCI_REG8(0x0068)
>> +#define VD56G3_REG_APPLIED_DIGITAL_GAIN CCI_REG16_LE(0x006a)
>> +#define VD56G3_REG_BOOT CCI_REG8(0x0200)
>> +#define VD56G3_CMD_ACK 0
>> +#define VD56G3_CMD_BOOT 1
>> +#define VD56G3_REG_STBY CCI_REG8(0x0201)
>> +#define VD56G3_CMD_START_STREAM 1
>> +#define VD56G3_REG_STREAMING CCI_REG8(0x0202)
>> +#define VD56G3_CMD_STOP_STREAM 1
>> +#define VD56G3_REG_EXT_CLOCK CCI_REG32_LE(0x0220)
>> +#define VD56G3_REG_CLK_PLL_PREDIV CCI_REG8(0x0224)
>> +#define VD56G3_REG_CLK_SYS_PLL_MULT CCI_REG8(0x0226)
>> +#define VD56G3_REG_ORIENTATION CCI_REG8(0x0302)
>> +#define VD56G3_REG_FORMAT_CTRL CCI_REG8(0x030a)
>> +#define VD56G3_REG_OIF_CTRL CCI_REG16_LE(0x030c)
>> +#define VD56G3_REG_OIF_IMG_CTRL CCI_REG8(0x030f)
>> +#define VD56G3_REG_OIF_CSI_BITRATE CCI_REG16_LE(0x0312)
>> +#define VD56G3_REG_DUSTER_CTRL CCI_REG8(0x0318)
>> +#define VD56G3_DUSTER_DISABLE 0
>> +#define VD56G3_DUSTER_ENABLE_DEF_MODULES 0x13
>> +#define VD56G3_REG_ISL_ENABLE CCI_REG8(0x0333)
>> +#define VD56G3_REG_DARKCAL_CTRL CCI_REG8(0x0340)
>> +#define VD56G3_DARKCAL_ENABLE 1
>> +#define VD56G3_DARKCAL_DISABLE_DARKAVG 2
>> +#define VD56G3_REG_PATGEN_CTRL CCI_REG16_LE(0x0400)
>> +#define VD56G3_PATGEN_ENABLE 1
>> +#define VD56G3_PATGEN_TYPE_SHIFT 4
>> +#define VD56G3_REG_AE_COLDSTART_COARSE_EXPOSURE CCI_REG16_LE(0x042a)
>> +#define VD56G3_REG_AE_COLDSTART_ANALOG_GAIN CCI_REG8(0x042c)
>> +#define VD56G3_REG_AE_COLDSTART_DIGITAL_GAIN CCI_REG16_LE(0x042e)
>> +#define VD56G3_REG_AE_ROI_START_H CCI_REG16_LE(0x0432)
>> +#define VD56G3_REG_AE_ROI_START_V CCI_REG16_LE(0x0434)
>> +#define VD56G3_REG_AE_ROI_END_H CCI_REG16_LE(0x0436)
>> +#define VD56G3_REG_AE_ROI_END_V CCI_REG16_LE(0x0438)
>> +#define VD56G3_REG_AE_COMPENSATION CCI_REG16_LE(0x043a)
>> +#define VD56G3_REG_EXP_MODE CCI_REG8(0x044c)
>> +#define VD56G3_EXP_MODE_AUTO 0
>> +#define VD56G3_EXP_MODE_FREEZE 1
>> +#define VD56G3_EXP_MODE_MANUAL 2
>> +#define VD56G3_REG_MANUAL_ANALOG_GAIN CCI_REG8(0x044d)
>> +#define VD56G3_REG_MANUAL_COARSE_EXPOSURE CCI_REG16_LE(0x044e)
>> +#define VD56G3_REG_MANUAL_DIGITAL_GAIN_CH0 CCI_REG16_LE(0x0450)
>> +#define VD56G3_REG_MANUAL_DIGITAL_GAIN_CH1 CCI_REG16_LE(0x0452)
>> +#define VD56G3_REG_MANUAL_DIGITAL_GAIN_CH2 CCI_REG16_LE(0x0454)
>> +#define VD56G3_REG_MANUAL_DIGITAL_GAIN_CH3 CCI_REG16_LE(0x0456)
>> +#define VD56G3_REG_FRAME_LENGTH CCI_REG16_LE(0x0458)
>> +#define VD56G3_REG_Y_START CCI_REG16_LE(0x045a)
>> +#define VD56G3_REG_Y_END CCI_REG16_LE(0x045c)
>> +#define VD56G3_REG_OUT_ROI_X_START CCI_REG16_LE(0x045e)
>> +#define VD56G3_REG_OUT_ROI_X_END CCI_REG16_LE(0x0460)
>> +#define VD56G3_REG_OUT_ROI_Y_START CCI_REG16_LE(0x0462)
>> +#define VD56G3_REG_OUT_ROI_Y_END CCI_REG16_LE(0x0464)
>> +#define VD56G3_REG_GPIO_0_CTRL CCI_REG8(0x0467)
>> +#define VD56G3_GPIOX_GPIO_IN 0x01
>> +#define VD56G3_GPIOX_STROBE_MODE 0x02
>> +#define VD56G3_REG_READOUT_CTRL CCI_REG8(0x047e)
>> +#define READOUT_NORMAL 0x00
>> +#define READOUT_DIGITAL_BINNING_X2 0x01
>> +
>> +/*
>> + * The VD56G3 pixel array is organized as follows:
>> + *
>> + * +--------------------------------+
>> + * | | \
>> + * | +------------------------+ | |
>> + * | | | | |
>> + * | | | | |
>> + * | | | | |
>> + * | | | | |
>> + * | | | | |
>> + * | | Default resolution | | | Native height (1364)
>
> What's outside the default resolution? It doesn't appear the driver would
> allow capturing pixels out side this area.
Well both native and default resolutions are supported in the
'vd56g3_supported_modes' below.
However this quite exotic resolution (1364 x 1124) isn't well supported
by csi receivers, ISPs. That's why the default resolution of the driver
is 1120 x 1360 (multiple of 16).
>
>> + * | | 1120 x 1360 | | |
>> + * | | | | |
>> + * | | | | |
>> + * | | | | |
>> + * | | | | |
>> + * | +------------------------+ | |
>> + * | | /
>> + * +--------------------------------+
>> + * <----------------------------->
>> + * \------------------- Native width (1124)
>> + *
>> + * The native resolution is 1124x1364.
>> + * The recommended/default resolution is 1120x1360 (multiple of 16).
>> + */
>> +#define VD56G3_NATIVE_WIDTH 1124
>> +#define VD56G3_NATIVE_HEIGHT 1364
>> +#define VD56G3_DEFAULT_WIDTH 1120
>> +#define VD56G3_DEFAULT_HEIGHT 1360
>> +#define VD56G3_DEFAULT_MODE 1
>> +
>> +/* PLL settings */
>> +#define VD56G3_TARGET_PLL 804000000UL
>> +#define VD56G3_VT_CLOCK_DIV 5
>> +
>> +/* Line length and Frame length (settings are for standard 10bits ADC mode) */
>> +#define VD56G3_LINE_LENGTH_MIN 1236
>> +#define VD56G3_VBLANK_MIN 110
>> +#define VD56G3_FRAME_LENGTH_DEF_60FPS 2168
>> +
>> +/* Exposure settings */
>> +#define VD56G3_EXPOSURE_MARGIN 75
>> +#define VD56G3_EXPOSURE_DEFAULT 1420
>> +
>> +/* Output Interface settings */
>> +#define VD56G3_MAX_CSI_DATA_LANES 2
>> +#define VD56G3_LINK_FREQ_DEF_1LANE 750000000UL
>> +#define VD56G3_LINK_FREQ_DEF_2LANES 402000000UL
>> +
>> +/* GPIOs */
>> +#define VD56G3_NB_GPIOS 8
>> +
>> +/* regulator supplies */
>> +static const char *const vd56g3_supply_names[] = {
>> + "vcore",
>> + "vddio",
>> + "vana",
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Models (VD56G3: Mono, VD66GY: Bayer RGB), Modes and formats
>> + */
>> +
>> +enum vd56g3_models {
>> + VD56G3_MODEL_VD56G3,
>> + VD56G3_MODEL_VD66GY,
>> +};
>> +
>> +struct vd56g3_mode {
>> + u32 width;
>> + u32 height;
>> +};
>> +
>> +static const struct vd56g3_mode vd56g3_supported_modes[] = {
>> + {
>> + .width = VD56G3_NATIVE_WIDTH,
>> + .height = VD56G3_NATIVE_HEIGHT,
>> + },
>> + {
>> + .width = VD56G3_DEFAULT_WIDTH,
>> + .height = VD56G3_DEFAULT_HEIGHT,
>> + },
>> + {
>> + .width = 1024,
>> + .height = 1280,
>> + },
>> + {
>> + .width = 1024,
>> + .height = 768,
>> + },
>> + {
>> + .width = 768,
>> + .height = 1024,
>> + },
>> + {
>> + .width = 720,
>> + .height = 1280,
>> + },
>> + {
>> + .width = 640,
>> + .height = 480,
>> + },
>> + {
>> + .width = 480,
>> + .height = 640,
>> + },
>> + {
>> + .width = 320,
>> + .height = 240,
>> + },
>> +};
>> +
>> +/*
>> + * Sensor support 8bits and 10bits output in both variants
>> + * - Monochrome
>> + * - RGB (with all H/V flip variations)
>> + */
>> +static const unsigned int vd56g3_mbus_codes[2][5] = {
>> + {
>> + MEDIA_BUS_FMT_Y8_1X8,
>> + MEDIA_BUS_FMT_SGRBG8_1X8,
>> + MEDIA_BUS_FMT_SRGGB8_1X8,
>> + MEDIA_BUS_FMT_SBGGR8_1X8,
>> + MEDIA_BUS_FMT_SGBRG8_1X8,
>> + },
>> + {
>> + MEDIA_BUS_FMT_Y10_1X10,
>> + MEDIA_BUS_FMT_SGRBG10_1X10,
>> + MEDIA_BUS_FMT_SRGGB10_1X10,
>> + MEDIA_BUS_FMT_SBGGR10_1X10,
>> + MEDIA_BUS_FMT_SGBRG10_1X10,
>> + },
>> +};
>> +
>> +enum vd56g3_expo_state {
>> + VD56G3_EXPO_AUTO,
>> + VD56G3_EXPO_AUTO_FREEZE,
>> + VD56G3_EXPO_MANUAL
>> +};
>> +
>> +struct vd56g3 {
>> + struct i2c_client *i2c_client;
>> + struct v4l2_subdev sd;
>> + struct media_pad pad;
>> + struct regulator_bulk_data supplies[ARRAY_SIZE(vd56g3_supply_names)];
>> + struct gpio_desc *reset_gpio;
>> + struct clk *xclk;
>> + struct regmap *regmap;
>> + u32 xclk_freq;
>> + u32 pll_prediv;
>> + u32 pll_mult;
>> + u32 pixel_clock;
>> + u16 oif_ctrl;
>> + u8 nb_of_lane;
>> + u32 gpios[VD56G3_NB_GPIOS];
>> + unsigned long ext_leds_mask;
>> + bool is_mono;
>> + struct v4l2_ctrl_handler ctrl_handler;
>> + struct v4l2_ctrl *hblank_ctrl;
>> + struct v4l2_ctrl *vblank_ctrl;
>> + struct {
>> + struct v4l2_ctrl *hflip_ctrl;
>> + struct v4l2_ctrl *vflip_ctrl;
>> + };
>> + struct v4l2_ctrl *patgen_ctrl;
>> + struct {
>> + struct v4l2_ctrl *ae_ctrl;
>> + struct v4l2_ctrl *expo_ctrl;
>> + struct v4l2_ctrl *again_ctrl;
>> + struct v4l2_ctrl *dgain_ctrl;
>> + };
>> + struct v4l2_ctrl *ae_lock_ctrl;
>> + struct v4l2_ctrl *ae_bias_ctrl;
>> + struct v4l2_ctrl *led_ctrl;
>> + bool streaming;
>> +};
>> +
>> +static inline struct vd56g3 *to_vd56g3(struct v4l2_subdev *sd)
>> +{
>> + return container_of_const(sd, struct vd56g3, sd);
>> +}
>> +
>> +static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
>> +{
>> + return &container_of_const(ctrl->handler, struct vd56g3, ctrl_handler)
>> + ->sd;
>> +}
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Additional i2c register helpers
>> + */
>> +
>> +static int vd56g3_poll_reg(struct vd56g3 *sensor, u32 reg, u8 poll_val,
>> + int *err)
>> +{
>> + unsigned int val = 0;
>> + int ret;
>> +
>> + if (err && *err)
>> + return *err;
>> +
>> + ret = regmap_read_poll_timeout(sensor->regmap, CCI_REG_ADDR(reg), val,
>> + (val == poll_val), 2000,
>> + 500 * USEC_PER_MSEC);
>> +
>> + if (ret && err)
>> + *err = ret;
>> +
>> + return ret;
>> +}
>> +
>> +static int vd56g3_wait_state(struct vd56g3 *sensor, int state, int *err)
>> +{
>> + return vd56g3_poll_reg(sensor, VD56G3_REG_SYSTEM_FSM, state, err);
>> +}
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Controls: definitions, helpers and handlers
>> + */
>> +
>> +static const char *const vd56g3_tp_menu[] = { "Disabled", "Solid", "Colorbar",
>> + "Gradbar", "Hgrey", "Vgrey",
>> + "Dgrey", "PN28" };
>> +
>> +static const s64 vd56g3_ev_bias_qmenu[] = { -4000, -3500, -3000, -2500, -2000,
>> + -1500, -1000, -500, 0, 500,
>> + 1000, 1500, 2000, 2500, 3000,
>> + 3500, 4000 };
>> +
>> +static const s64 vd56g3_link_freq_1lane[] = { VD56G3_LINK_FREQ_DEF_1LANE };
>> +
>> +static const s64 vd56g3_link_freq_2lanes[] = { VD56G3_LINK_FREQ_DEF_2LANES };
>> +
>> +static u8 vd56g3_get_bpp(__u32 code)
>> +{
>> + switch (code) {
>> + case MEDIA_BUS_FMT_Y8_1X8:
>> + case MEDIA_BUS_FMT_SGRBG8_1X8:
>> + case MEDIA_BUS_FMT_SRGGB8_1X8:
>> + case MEDIA_BUS_FMT_SBGGR8_1X8:
>> + case MEDIA_BUS_FMT_SGBRG8_1X8:
>> + default:
>> + return 8;
>> + case MEDIA_BUS_FMT_Y10_1X10:
>> + case MEDIA_BUS_FMT_SGRBG10_1X10:
>> + case MEDIA_BUS_FMT_SRGGB10_1X10:
>> + case MEDIA_BUS_FMT_SBGGR10_1X10:
>> + case MEDIA_BUS_FMT_SGBRG10_1X10:
>> + return 10;
>> + }
>> +}
>> +
>> +static u8 vd56g3_get_datatype(__u32 code)
>> +{
>> + switch (code) {
>> + case MEDIA_BUS_FMT_Y8_1X8:
>> + case MEDIA_BUS_FMT_SGRBG8_1X8:
>> + case MEDIA_BUS_FMT_SRGGB8_1X8:
>> + case MEDIA_BUS_FMT_SBGGR8_1X8:
>> + case MEDIA_BUS_FMT_SGBRG8_1X8:
>> + default:
>> + return MIPI_CSI2_DT_RAW8;
>> + case MEDIA_BUS_FMT_Y10_1X10:
>> + case MEDIA_BUS_FMT_SGRBG10_1X10:
>> + case MEDIA_BUS_FMT_SRGGB10_1X10:
>> + case MEDIA_BUS_FMT_SBGGR10_1X10:
>> + case MEDIA_BUS_FMT_SGBRG10_1X10:
>> + return MIPI_CSI2_DT_RAW10;
>> + }
>> +}
>> +
>> +static int vd56g3_read_expo_cluster(struct vd56g3 *sensor, bool force_cur_val)
>> +{
>> + u64 exposure = 0;
>> + u64 again = 0;
>> + u64 dgain = 0;
>> + int ret = 0;
>> +
>> + /*
>> + * When 'force_cur_val' is enabled, save the ctrl value in 'cur.val'
>> + * instead of the normal 'val', this is used during poweroff to cache
>> + * volatile ctrls and enable coldstart.
>> + */
>> + cci_read(sensor->regmap, VD56G3_REG_APPLIED_COARSE_EXPOSURE, &exposure,
>> + &ret);
>> + cci_read(sensor->regmap, VD56G3_REG_APPLIED_ANALOG_GAIN, &again, &ret);
>> + cci_read(sensor->regmap, VD56G3_REG_APPLIED_DIGITAL_GAIN, &dgain, &ret);
>> + if (ret)
>> + return ret;
>> +
>> + if (force_cur_val) {
>> + sensor->expo_ctrl->cur.val = exposure;
>> + sensor->again_ctrl->cur.val = again;
>> + sensor->dgain_ctrl->cur.val = dgain;
>> + } else {
>> + sensor->expo_ctrl->val = exposure;
>> + sensor->again_ctrl->val = again;
>> + sensor->dgain_ctrl->val = dgain;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static int vd56g3_update_patgen(struct vd56g3 *sensor, u32 patgen_index)
>> +{
>> + u32 pattern = patgen_index <= 3 ? patgen_index : patgen_index + 12;
>> + u16 patgen = pattern << VD56G3_PATGEN_TYPE_SHIFT;
>> + u8 duster = VD56G3_DUSTER_ENABLE_DEF_MODULES;
>> + u8 darkcal = VD56G3_DARKCAL_ENABLE;
>> + int ret = 0;
>> +
>> + if (patgen_index) {
>> + patgen |= VD56G3_PATGEN_ENABLE;
>> + duster = VD56G3_DUSTER_DISABLE;
>> + darkcal = VD56G3_DARKCAL_DISABLE_DARKAVG;
>> + }
>> +
>> + cci_write(sensor->regmap, VD56G3_REG_DUSTER_CTRL, duster, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_DARKCAL_CTRL, darkcal, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_PATGEN_CTRL, patgen, &ret);
>> +
>> + return ret;
>> +}
>> +
>> +static int vd56g3_update_expo_cluster(struct vd56g3 *sensor, bool is_auto)
>> +{
>> + enum vd56g3_expo_state expo_state = is_auto ? VD56G3_EXP_MODE_AUTO :
>> + VD56G3_EXP_MODE_MANUAL;
>> + int ret = 0;
>> +
>> + if (sensor->ae_ctrl->is_new)
>> + cci_write(sensor->regmap, VD56G3_REG_EXP_MODE, expo_state,
>> + &ret);
>> +
>> + /* In Auto expo, set coldstart parameters */
>> + if (is_auto && sensor->ae_ctrl->is_new) {
>> + cci_write(sensor->regmap,
>> + VD56G3_REG_AE_COLDSTART_COARSE_EXPOSURE,
>> + sensor->expo_ctrl->val, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_AE_COLDSTART_ANALOG_GAIN,
>> + sensor->again_ctrl->val, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_AE_COLDSTART_DIGITAL_GAIN,
>> + sensor->dgain_ctrl->val, &ret);
>> + }
>> +
>> + /* In Manual expo, set exposure, analog and digital gains */
>> + if (!is_auto && sensor->expo_ctrl->is_new)
>> + cci_write(sensor->regmap, VD56G3_REG_MANUAL_COARSE_EXPOSURE,
>> + sensor->expo_ctrl->val, &ret);
>> +
>> + if (!is_auto && sensor->again_ctrl->is_new)
>> + cci_write(sensor->regmap, VD56G3_REG_MANUAL_ANALOG_GAIN,
>> + sensor->again_ctrl->val, &ret);
>> +
>> + if (!is_auto && sensor->dgain_ctrl->is_new) {
>> + cci_write(sensor->regmap, VD56G3_REG_MANUAL_DIGITAL_GAIN_CH0,
>> + sensor->dgain_ctrl->val, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_MANUAL_DIGITAL_GAIN_CH1,
>> + sensor->dgain_ctrl->val, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_MANUAL_DIGITAL_GAIN_CH2,
>> + sensor->dgain_ctrl->val, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_MANUAL_DIGITAL_GAIN_CH3,
>> + sensor->dgain_ctrl->val, &ret);
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static int vd56g3_lock_exposure(struct vd56g3 *sensor, u32 lock_val)
>> +{
>> + bool ae_lock = lock_val & V4L2_LOCK_EXPOSURE;
>> + enum vd56g3_expo_state expo_state = ae_lock ? VD56G3_EXP_MODE_FREEZE :
>> + VD56G3_EXP_MODE_AUTO;
>> + int ret = 0;
>> +
>> + if (sensor->ae_ctrl->val == V4L2_EXPOSURE_AUTO)
>> + cci_write(sensor->regmap, VD56G3_REG_EXP_MODE, expo_state,
>
> You can return cci_write's return value here.
>
>> + &ret);
>> +
>> + return ret;
>
> And return 0 here.
>
Sure, Applied for V3.
>> +}
>> +
>> +static int vd56g3_write_gpiox(struct vd56g3 *sensor, unsigned long gpio_mask)
>> +{
>> + unsigned long io;
>> + u32 gpio_val;
>> + int ret = 0;
>> +
>> + for_each_set_bit(io, &gpio_mask, VD56G3_NB_GPIOS) {
>> + gpio_val = sensor->gpios[io];
>> +
>> + if (gpio_val == VD56G3_GPIOX_STROBE_MODE &&
>> + sensor->led_ctrl->val == V4L2_FLASH_LED_MODE_NONE)
>> + gpio_val = VD56G3_GPIOX_GPIO_IN;
>> +
>> + cci_write(sensor->regmap, VD56G3_REG_GPIO_0_CTRL + io, gpio_val,
>> + &ret);
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static int vd56g3_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
>> +{
>> + struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
>> + struct vd56g3 *sensor = to_vd56g3(sd);
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> + int ret = 0;
>> +
>> + /* Interact with HW only when it is powered ON */
>> + if (!pm_runtime_get_if_in_use(&client->dev))
>> + return 0;
>> +
>> + switch (ctrl->id) {
>> + case V4L2_CID_EXPOSURE_AUTO:
>> + ret = vd56g3_read_expo_cluster(sensor, false);
>> + break;
>> + default:
>> + ret = -EINVAL;
>> + break;
>> + }
>> +
>> + pm_runtime_mark_last_busy(&client->dev);
>> + pm_runtime_put_autosuspend(&client->dev);
>
> This should be __pm_runtime_put_autosuspend(). pm_runtime_put_autosuspend()
> will be re-purposed soon to include marking the last busy timestamp.
I missed that, thanks for pointing me.
>
> Same elsewhere in the driver.
Applied for V3.
>
>> +
>> + return ret;
>> +}
>> +
>> +static int vd56g3_s_ctrl(struct v4l2_ctrl *ctrl)
>> +{
>> + struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
>> + struct vd56g3 *sensor = to_vd56g3(sd);
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> + struct v4l2_subdev_state *state;
>> + const struct v4l2_rect *crop;
>> + unsigned int frame_length = 0;
>> + unsigned int expo_max;
>> + unsigned int ae_compensation;
>> + bool is_auto = false;
>> + int ret;
>> +
>> + state = v4l2_subdev_get_locked_active_state(sd);
>> + crop = v4l2_subdev_state_get_crop(state, 0);
>> +
>> + if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
>> + return 0;
>> +
>> + /* Update controls state, range, etc. whatever the state of the HW */
>> + switch (ctrl->id) {
>> + case V4L2_CID_VBLANK:
>> + frame_length = crop->height + ctrl->val;
>> + expo_max = frame_length - VD56G3_EXPOSURE_MARGIN;
>> + __v4l2_ctrl_modify_range(sensor->expo_ctrl, 0, expo_max, 1,
>> + VD56G3_EXPOSURE_DEFAULT);
>
> __v4l2_ctrl_modify_range() may fail. Please handle the possible error.
I will handle it for V3.
>
>> + break;
>> + case V4L2_CID_EXPOSURE_AUTO:
>> + is_auto = (ctrl->val == V4L2_EXPOSURE_AUTO);
>> + __v4l2_ctrl_grab(sensor->ae_lock_ctrl, !is_auto);
>> + __v4l2_ctrl_grab(sensor->ae_bias_ctrl, !is_auto);
>> + break;
>> + default:
>> + break;
>
> You could omit default here.
I don't really like switch case without default. For sure I can omit,
but I prefer making it explicit.
>
>> + }
>> +
>> + /* Interact with HW only when it is powered ON */
>> + if (!pm_runtime_get_if_in_use(&client->dev))
>> + return 0;
>> +
>> + switch (ctrl->id) {
>> + case V4L2_CID_HFLIP:
>> + ret = cci_write(sensor->regmap, VD56G3_REG_ORIENTATION,
>> + sensor->hflip_ctrl->val |
>> + (sensor->vflip_ctrl->val << 1),
>> + NULL);
>> + break;
>> + case V4L2_CID_TEST_PATTERN:
>> + ret = vd56g3_update_patgen(sensor, ctrl->val);
>> + break;
>> + case V4L2_CID_EXPOSURE_AUTO:
>> + ret = vd56g3_update_expo_cluster(sensor, is_auto);
>> + break;
>> + case V4L2_CID_3A_LOCK:
>> + ret = vd56g3_lock_exposure(sensor, ctrl->val);
>> + break;
>> + case V4L2_CID_AUTO_EXPOSURE_BIAS:
>> + ae_compensation =
>> + DIV_ROUND_CLOSEST((int)vd56g3_ev_bias_qmenu[ctrl->val] *
>> + 256, 1000);
>> + ret = cci_write(sensor->regmap, VD56G3_REG_AE_COMPENSATION,
>> + ae_compensation, NULL);
>> + break;
>> + case V4L2_CID_VBLANK:
>> + ret = cci_write(sensor->regmap, VD56G3_REG_FRAME_LENGTH,
>> + frame_length, NULL);
>> + break;
>> + case V4L2_CID_FLASH_LED_MODE:
>> + ret = vd56g3_write_gpiox(sensor, sensor->ext_leds_mask);
>> + break;
>> + default:
>> + ret = -EINVAL;
>> + break;
>> + }
>> +
>> + pm_runtime_mark_last_busy(&client->dev);
>> + pm_runtime_put_autosuspend(&client->dev);
>> +
>> + return ret;
>> +}
>> +
>> +static const struct v4l2_ctrl_ops vd56g3_ctrl_ops = {
>> + .g_volatile_ctrl = vd56g3_g_volatile_ctrl,
>> + .s_ctrl = vd56g3_s_ctrl,
>> +};
>> +
>> +static int vd56g3_update_controls(struct vd56g3 *sensor)
>> +{
>> + struct v4l2_subdev_state *state;
>> + const struct v4l2_rect *crop;
>> + unsigned int hblank;
>> + unsigned int vblank_min, vblank, vblank_max;
>> + unsigned int frame_length;
>> + unsigned int expo_max;
>> + int ret;
>> +
>> + state = v4l2_subdev_get_locked_active_state(&sensor->sd);
>> + crop = v4l2_subdev_state_get_crop(state, 0);
>> + hblank = VD56G3_LINE_LENGTH_MIN - crop->width;
>> + vblank_min = VD56G3_VBLANK_MIN;
>> + vblank = VD56G3_FRAME_LENGTH_DEF_60FPS - crop->height;
>> + vblank_max = 0xffff - crop->height;
>
> How about adding a corresponding FRAME_LENGTH_MAX macro for 0xffff?
Ok, better.
>
>> + frame_length = crop->height + vblank;
>> + expo_max = frame_length - VD56G3_EXPOSURE_MARGIN;
>> +
>> + /* Update blanking and exposure (ranges + values) */
>> + ret = __v4l2_ctrl_modify_range(sensor->hblank_ctrl, hblank, hblank, 1,
>> + hblank);
>> + if (ret)
>> + return ret;
>> +
>> + ret = __v4l2_ctrl_modify_range(sensor->vblank_ctrl, vblank_min,
>> + vblank_max, 1, vblank);
>> + if (ret)
>> + return ret;
>> +
>> + ret = __v4l2_ctrl_s_ctrl(sensor->vblank_ctrl, vblank);
>> + if (ret)
>> + return ret;
>> +
>> + ret = __v4l2_ctrl_modify_range(sensor->expo_ctrl, 0, expo_max, 1,
>> + VD56G3_EXPOSURE_DEFAULT);
>> + if (ret)
>> + return ret;
>> +
>> + return __v4l2_ctrl_s_ctrl(sensor->expo_ctrl, VD56G3_EXPOSURE_DEFAULT);
>> +}
>> +
>> +static int vd56g3_init_controls(struct vd56g3 *sensor)
>> +{
>> + const struct v4l2_ctrl_ops *ops = &vd56g3_ctrl_ops;
>> + struct v4l2_ctrl_handler *hdl = &sensor->ctrl_handler;
>> + struct v4l2_ctrl *ctrl;
>> + int ret;
>> +
>> + v4l2_ctrl_handler_init(hdl, 25);
>> +
>> + /* Horizontal & vertical flips modify bayer code on RGB variant */
>> + sensor->hflip_ctrl =
>> + v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
>> + if (sensor->hflip_ctrl)
>> + sensor->hflip_ctrl->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
>> +
>> + sensor->vflip_ctrl =
>> + v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
>> + if (sensor->vflip_ctrl)
>> + sensor->vflip_ctrl->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
>> +
>> + sensor->patgen_ctrl =
>> + v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
>> + ARRAY_SIZE(vd56g3_tp_menu) - 1, 0,
>> + 0, vd56g3_tp_menu);
>> +
>> + ctrl = v4l2_ctrl_new_int_menu(hdl, ops, V4L2_CID_LINK_FREQ,
>> + ARRAY_SIZE(vd56g3_link_freq_1lane) - 1, 0,
>> + (sensor->nb_of_lane == 2) ?
>> + vd56g3_link_freq_2lanes :
>> + vd56g3_link_freq_1lane);
>> + if (ctrl)
>> + ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
>> +
>> + ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_PIXEL_RATE,
>> + sensor->pixel_clock, sensor->pixel_clock, 1,
>> + sensor->pixel_clock);
>> + if (ctrl)
>> + ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
>> +
>> + sensor->ae_ctrl = v4l2_ctrl_new_std_menu(hdl, ops,
>> + V4L2_CID_EXPOSURE_AUTO,
>> + V4L2_EXPOSURE_MANUAL, 0,
>> + V4L2_EXPOSURE_AUTO);
>> +
>> + sensor->ae_lock_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_3A_LOCK, 0,
>> + GENMASK(2, 0), 0, 0);
>> +
>> + sensor->ae_bias_ctrl =
>> + v4l2_ctrl_new_int_menu(hdl, ops, V4L2_CID_AUTO_EXPOSURE_BIAS,
>> + ARRAY_SIZE(vd56g3_ev_bias_qmenu) - 1,
>> + ARRAY_SIZE(vd56g3_ev_bias_qmenu) / 2,
>> + vd56g3_ev_bias_qmenu);
>> +
>> + /*
>> + * Analog gain [1, 8] is computed with the following logic :
>> + * 32/(32 - again_reg), with again_reg in the range [0:28]
>> + * Digital gain [1.00, 8.00] is coded as a Fixed Point 5.8
>> + */
>> + sensor->again_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN,
>> + 0, 28, 1, 0);
>> + sensor->dgain_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_DIGITAL_GAIN,
>> + 0x100, 0x800, 1, 0x100);
>> +
>> + /*
>> + * Set the exposure, horizontal and vertical blanking ctrls
>> + * to hardcoded values, they will be updated in vd56g3_update_controls.
>> + * Exposure being in an auto-cluster, set a significant value here.
>> + */
>> + sensor->expo_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
>> + VD56G3_EXPOSURE_DEFAULT,
>> + VD56G3_EXPOSURE_DEFAULT, 1,
>> + VD56G3_EXPOSURE_DEFAULT);
>> + sensor->hblank_ctrl =
>> + v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HBLANK, 1, 1, 1, 1);
>> + if (sensor->hblank_ctrl)
>> + sensor->hblank_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
>> + sensor->vblank_ctrl =
>> + v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VBLANK, 1, 1, 1, 1);
>> +
>> + /* Additional control based on device tree properties */
>> + if (sensor->ext_leds_mask)
>> + sensor->led_ctrl =
>> + v4l2_ctrl_new_std_menu(hdl, ops,
>> + V4L2_CID_FLASH_LED_MODE,
>> + V4L2_FLASH_LED_MODE_FLASH, 0,
>> + V4L2_FLASH_LED_MODE_NONE);
>> +
>> + if (hdl->error) {
>> + ret = hdl->error;
>> + goto free_ctrls;
>> + }
>> +
>> + v4l2_ctrl_cluster(2, &sensor->hflip_ctrl);
>> + v4l2_ctrl_auto_cluster(4, &sensor->ae_ctrl, V4L2_EXPOSURE_MANUAL, true);
>> +
>> + sensor->sd.ctrl_handler = hdl;
>> +
>> + return 0;
>> +
>> +free_ctrls:
>> + v4l2_ctrl_handler_free(hdl);
>> +
>> + return ret;
>> +}
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Videos ops
>> + */
>> +
>> +static int vd56g3_stream_on(struct vd56g3 *sensor,
>> + struct v4l2_subdev_state *state)
>> +{
>> + const struct v4l2_mbus_framefmt *format;
>> + const struct v4l2_rect *crop;
>> + unsigned int csi_mbps = ((sensor->nb_of_lane == 2) ?
>> + VD56G3_LINK_FREQ_DEF_2LANES :
>> + VD56G3_LINK_FREQ_DEF_1LANE) * 2 / MEGA;
>> + unsigned int binning;
>> + int ret = 0;
>> +
>> + format = v4l2_subdev_state_get_format(state, 0);
>> + crop = v4l2_subdev_state_get_crop(state, 0);
>
> You could do the assignments in variable declaration.
Ok, applied for V3
>
>> +
>> + /* configure clocks */
>> + cci_write(sensor->regmap, VD56G3_REG_EXT_CLOCK, sensor->xclk_freq,
>> + &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_CLK_PLL_PREDIV, sensor->pll_prediv,
>> + &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_CLK_SYS_PLL_MULT, sensor->pll_mult,
>> + &ret);
>> +
>> + /* configure output */
>> + cci_write(sensor->regmap, VD56G3_REG_FORMAT_CTRL,
>> + vd56g3_get_bpp(format->code), &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_OIF_CTRL, sensor->oif_ctrl, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_OIF_CSI_BITRATE, csi_mbps, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_OIF_IMG_CTRL,
>> + vd56g3_get_datatype(format->code), &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_ISL_ENABLE, 0, &ret);
>> +
>> + /* configure binning mode */
>> + switch (crop->width / format->width) {
>> + case 1:
>> + default:
>> + binning = READOUT_NORMAL;
>> + break;
>> + case 2:
>> + binning = READOUT_DIGITAL_BINNING_X2;
>> + break;
>> + }
>> + cci_write(sensor->regmap, VD56G3_REG_READOUT_CTRL, binning, &ret);
>> +
>> + /* configure ROIs */
>> + cci_write(sensor->regmap, VD56G3_REG_Y_START, crop->top, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_Y_END,
>> + crop->top + crop->height - 1, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_OUT_ROI_X_START, crop->left, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_OUT_ROI_X_END,
>> + crop->left + crop->width - 1, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_OUT_ROI_Y_START, 0, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_OUT_ROI_Y_END, crop->height - 1,
>> + &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_AE_ROI_START_H, crop->left, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_AE_ROI_END_H,
>> + crop->left + crop->width - 1, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_AE_ROI_START_V, 0, &ret);
>> + cci_write(sensor->regmap, VD56G3_REG_AE_ROI_END_V, crop->height - 1,
>> + &ret);
>> + if (ret)
>> + return ret;
>> +
>> + /* Setup default GPIO values; could be overridden by V4L2 ctrl setup */
>> + ret = vd56g3_write_gpiox(sensor, GENMASK(VD56G3_NB_GPIOS - 1, 0));
>> + if (ret)
>> + return ret;
>> +
>> + /* Apply settings from V4L2 ctrls */
>> + ret = __v4l2_ctrl_handler_setup(&sensor->ctrl_handler);
>> + if (ret)
>> + return ret;
>> +
>> + /* start streaming */
>> + cci_write(sensor->regmap, VD56G3_REG_STBY, VD56G3_CMD_START_STREAM,
>> + &ret);
>> + vd56g3_poll_reg(sensor, VD56G3_REG_STBY, VD56G3_CMD_ACK, &ret);
>> + vd56g3_wait_state(sensor, VD56G3_SYSTEM_FSM_STREAMING, &ret);
>> +
>> + return ret;
>> +}
>> +
>> +static int vd56g3_stream_off(struct vd56g3 *sensor)
>> +{
>> + int ret;
>> +
>> + /* Retrieve Expo cluster to enable coldstart of AE */
>> + ret = vd56g3_read_expo_cluster(sensor, true);
>> +
>> + cci_write(sensor->regmap, VD56G3_REG_STREAMING, VD56G3_CMD_STOP_STREAM,
>> + &ret);
>> + vd56g3_poll_reg(sensor, VD56G3_REG_STREAMING, VD56G3_CMD_ACK, &ret);
>> + vd56g3_wait_state(sensor, VD56G3_SYSTEM_FSM_SW_STBY, &ret);
>> +
>> + return ret;
>> +}
>> +
>> +static int vd56g3_s_stream(struct v4l2_subdev *sd, int enable)
>> +{
>> + struct vd56g3 *sensor = to_vd56g3(sd);
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> + struct v4l2_subdev_state *state;
>> + int ret = 0;
>> +
>> + state = v4l2_subdev_lock_and_get_active_state(sd);
>> +
>> + if (enable) {
>> + ret = pm_runtime_resume_and_get(&client->dev);
>> + if (ret < 0)
>> + goto unlock;
>> + ret = vd56g3_stream_on(sensor, state);
>> + if (ret) {
>> + dev_err(&client->dev, "Failed to start streaming\n");
>> + pm_runtime_put_sync(&client->dev);
>> + }
>> + } else {
>> + vd56g3_stream_off(sensor);
>> + pm_runtime_mark_last_busy(&client->dev);
>> + pm_runtime_put_autosuspend(&client->dev);
>> + }
>> +
>> + if (!ret) {
>> + sensor->streaming = enable;
>> +
>> + /* some controls are locked during streaming */
>> + __v4l2_ctrl_grab(sensor->hflip_ctrl, enable);
>> + __v4l2_ctrl_grab(sensor->vflip_ctrl, enable);
>> + __v4l2_ctrl_grab(sensor->patgen_ctrl, enable);
>> + }
>> +
>> +unlock:
>> + v4l2_subdev_unlock_state(state);
>> +
>> + return ret;
>> +}
>> +
>> +static const struct v4l2_subdev_video_ops vd56g3_video_ops = {
>> + .s_stream = vd56g3_s_stream,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Pad ops
>> + */
>> +
>> +/* Media bus code is dependent of :
>> + * - 8bits or 10bits output
>> + * - variant : Mono or RGB
>> + * - H/V flips parameters in case of RGB
>> + */
>> +static u32 vd56g3_get_mbus_code(struct vd56g3 *sensor, u32 code)
>> +{
>> + unsigned int i_bpp;
>> + unsigned int j;
>> +
>> + for (i_bpp = 0; i_bpp < ARRAY_SIZE(vd56g3_mbus_codes); i_bpp++) {
>> + for (j = 0; j < ARRAY_SIZE(vd56g3_mbus_codes[i_bpp]); j++) {
>> + if (vd56g3_mbus_codes[i_bpp][j] == code)
>> + goto endloops;
>> + }
>> + }
>> +
>> +endloops:
>> + if (i_bpp >= ARRAY_SIZE(vd56g3_mbus_codes))
>> + i_bpp = 0;
>> +
>> + if (sensor->is_mono)
>> + j = 0;
>> + else
>> + j = 1 + (sensor->hflip_ctrl->val ? 1 : 0) +
>> + (sensor->vflip_ctrl->val ? 2 : 0);
>> +
>> + return vd56g3_mbus_codes[i_bpp][j];
>> +}
>> +
>> +static int vd56g3_enum_mbus_code(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *sd_state,
>> + struct v4l2_subdev_mbus_code_enum *code)
>> +{
>> + struct vd56g3 *sensor = to_vd56g3(sd);
>> +
>> + if (code->index >= ARRAY_SIZE(vd56g3_mbus_codes))
>> + return -EINVAL;
>> +
>> + code->code =
>> + vd56g3_get_mbus_code(sensor, vd56g3_mbus_codes[code->index][0]);
>> +
>> + return 0;
>> +}
>> +
>> +static int vd56g3_enum_frame_size(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *sd_state,
>> + struct v4l2_subdev_frame_size_enum *fse)
>> +{
>> + if (fse->index >= ARRAY_SIZE(vd56g3_supported_modes))
>> + return -EINVAL;
>> +
>> + fse->min_width = vd56g3_supported_modes[fse->index].width;
>> + fse->max_width = fse->min_width;
>> + fse->min_height = vd56g3_supported_modes[fse->index].height;
>> + fse->max_height = fse->min_height;
>> +
>> + return 0;
>> +}
>> +
>> +static void vd56g3_update_img_pad_format(struct vd56g3 *sensor,
>> + const struct vd56g3_mode *mode,
>> + u32 mbus_code,
>> + struct v4l2_mbus_framefmt *mbus_fmt)
>> +{
>> + mbus_fmt->width = mode->width;
>> + mbus_fmt->height = mode->height;
>> + mbus_fmt->code = vd56g3_get_mbus_code(sensor, mbus_code);
>> + mbus_fmt->colorspace = V4L2_COLORSPACE_RAW;
>> + mbus_fmt->field = V4L2_FIELD_NONE;
>> + mbus_fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
>> + mbus_fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
>> + mbus_fmt->xfer_func = V4L2_XFER_FUNC_NONE;
>> +}
>> +
>> +static int vd56g3_set_pad_fmt(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *sd_state,
>> + struct v4l2_subdev_format *sd_fmt)
>> +{
>> + struct vd56g3 *sensor = to_vd56g3(sd);
>> + const struct vd56g3_mode *new_mode;
>> + struct v4l2_rect pad_crop;
>> + unsigned int binning;
>> + int ret = 0;
>> +
>> + if (sensor->streaming)
>> + return -EBUSY;
>
> Setting the try format should be possible during streaming.
Good point, this sensor->streaming check results from an old copy/paste.
I had a quick look at imx219 driver and it's implemented differently, I
need to see if I can align, this could allow to drop the 'streaming'
boolean (which is never used elesewhere).
>
>> +
>> + new_mode = v4l2_find_nearest_size(vd56g3_supported_modes,
>> + ARRAY_SIZE(vd56g3_supported_modes),
>> + width, height, sd_fmt->format.width,
>> + sd_fmt->format.height);
>> +
>> + vd56g3_update_img_pad_format(sensor, new_mode, sd_fmt->format.code,
>> + &sd_fmt->format);
>> +
>> + /* Compute crop rectangle (maximized via binning) */
>> + binning = min(VD56G3_NATIVE_WIDTH / sd_fmt->format.width,
>> + VD56G3_NATIVE_HEIGHT / sd_fmt->format.height);
>> + binning = min(binning, 2U);
>> + pad_crop.width = sd_fmt->format.width * binning;
>> + pad_crop.height = sd_fmt->format.height * binning;
>> + pad_crop.left = (VD56G3_NATIVE_WIDTH - pad_crop.width) / 2;
>> + pad_crop.top = (VD56G3_NATIVE_HEIGHT - pad_crop.height) / 2;
>> +
>> + /* Update active state's format and crop */
>> + if (sd_fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
>> + ret = vd56g3_update_controls(sensor);
>> +
>> + if (!ret) {
>> + *v4l2_subdev_state_get_format(sd_state, sd_fmt->pad) =
>> + sd_fmt->format;
>> + *v4l2_subdev_state_get_crop(sd_state, sd_fmt->pad) = pad_crop;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static int vd56g3_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:
>> + sel->r = *v4l2_subdev_state_get_crop(sd_state, 0);
>> + break;
>> + case V4L2_SEL_TGT_NATIVE_SIZE:
>> + case V4L2_SEL_TGT_CROP_DEFAULT:
>> + case V4L2_SEL_TGT_CROP_BOUNDS:
>> + sel->r.top = 0;
>> + sel->r.left = 0;
>> + sel->r.width = VD56G3_NATIVE_WIDTH;
>> + sel->r.height = VD56G3_NATIVE_HEIGHT;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int vd56g3_init_state(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *sd_state)
>> +{
>> + unsigned int def_mode = VD56G3_DEFAULT_MODE;
>> + struct v4l2_subdev_format fmt = {
>> + .which = V4L2_SUBDEV_FORMAT_TRY,
>> + .pad = 0,
>> + .format = {
>> + .code = vd56g3_mbus_codes[0][0],
>> + .width = vd56g3_supported_modes[def_mode].width,
>> + .height = vd56g3_supported_modes[def_mode].height,
>> + },
>> + };
>> +
>> + vd56g3_set_pad_fmt(sd, sd_state, &fmt);
>
> I think you could just return what vd56g3_set_pad_fmt did -- it's zero
> (after fixing the streaming check in it).
Ok, make sense.
>
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_subdev_core_ops vd56g3_core_ops = {
>> + .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
>> + .unsubscribe_event = v4l2_event_subdev_unsubscribe,
>> +};
>> +
>> +static const struct v4l2_subdev_pad_ops vd56g3_pad_ops = {
>> + .enum_mbus_code = vd56g3_enum_mbus_code,
>> + .enum_frame_size = vd56g3_enum_frame_size,
>> + .get_fmt = v4l2_subdev_get_fmt,
>> + .set_fmt = vd56g3_set_pad_fmt,
>> + .get_selection = vd56g3_get_selection,
>> +};
>> +
>> +static const struct v4l2_subdev_ops vd56g3_subdev_ops = {
>> + .core = &vd56g3_core_ops,
>> + .video = &vd56g3_video_ops,
>> + .pad = &vd56g3_pad_ops,
>> +};
>> +
>> +static const struct media_entity_operations vd56g3_subdev_entity_ops = {
>> + .link_validate = v4l2_subdev_link_validate,
>> +};
>> +
>> +static const struct v4l2_subdev_internal_ops vd56g3_internal_ops = {
>> + .init_state = vd56g3_init_state,
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Power management
>> + */
>> +
>> +static int vd56g3_power_on(struct vd56g3 *sensor)
>> +{
>> + struct i2c_client *client = sensor->i2c_client;
>> + int ret;
>> +
>> + /* power on */
>> + ret = regulator_bulk_enable(ARRAY_SIZE(sensor->supplies),
>> + sensor->supplies);
>> + if (ret) {
>> + dev_err(&client->dev, "Failed to enable regulators %d", ret);
>> + return ret;
>> + }
>> +
>> + ret = clk_prepare_enable(sensor->xclk);
>> + if (ret) {
>> + dev_err(&client->dev, "Failed to enable clock %d", ret);
>> + goto disable_reg;
>> + }
>> +
>> + gpiod_set_value_cansleep(sensor->reset_gpio, 0);
>> + usleep_range(3500, 4000);
>> + ret = vd56g3_wait_state(sensor, VD56G3_SYSTEM_FSM_READY_TO_BOOT, NULL);
>> + if (ret) {
>> + dev_err(&client->dev, "Sensor reset failed %d\n", ret);
>> + goto disable_clock;
>> + }
>> +
>> + /* boot sensor */
>> + cci_write(sensor->regmap, VD56G3_REG_BOOT, VD56G3_CMD_BOOT, &ret);
>> + vd56g3_poll_reg(sensor, VD56G3_REG_BOOT, VD56G3_CMD_ACK, &ret);
>> + vd56g3_wait_state(sensor, VD56G3_SYSTEM_FSM_SW_STBY, &ret);
>> + if (ret) {
>> + dev_err(&client->dev, "sensor boot failed %d", ret);
>> + goto disable_clock;
>> + }
>> +
>> + return 0;
>> +
>> +disable_clock:
>> + clk_disable_unprepare(sensor->xclk);
>> + gpiod_set_value_cansleep(sensor->reset_gpio, 1);
>> +disable_reg:
>> + regulator_bulk_disable(ARRAY_SIZE(sensor->supplies), sensor->supplies);
>> +
>> + return ret;
>> +}
>> +
>> +static int vd56g3_power_off(struct vd56g3 *sensor)
>> +{
>> + clk_disable_unprepare(sensor->xclk);
>> + gpiod_set_value_cansleep(sensor->reset_gpio, 1);
>> + regulator_bulk_disable(ARRAY_SIZE(sensor->supplies), sensor->supplies);
>> + return 0;
>
> You can make the return type void.
>
> Do you need two pairs of functions doing the same, or could you call
> vd56g3_runtime_resume and vd56g3_runtime_suspend from driver's probe and
> remove functions, too?
"Well, in fact, I tested both options before submitting V2 (I mean the
unification of vd56g3_runtime_resume/suspend functions with
vd56g3_power_on/off).
The unification option has the advantage of simplifying the code and
removing two "useless" functions. The only drawback is that I had to
call v4l2_i2c_subdev_init() earlier in the probe() function, whereas
it's currently called in vd56g3_subdev_init() (currently at the end of
the probe()). OK, it's not a big deal, but I find that the resulting
code is not as well structured/divided (thus readable).
I'm interested to get your feedback to decide wich option to push for V3.
>
>> +}
>> +
>> +static int vd56g3_runtime_resume(struct device *dev)
>> +{
>> + struct v4l2_subdev *sd = dev_get_drvdata(dev);
>> + struct vd56g3 *sensor = to_vd56g3(sd);
>> + struct i2c_client *client = sensor->i2c_client;
>> + int ret;
>> +
>> + ret = vd56g3_power_on(sensor);
>> + if (ret)
>> + dev_err(&client->dev, "Failed to power on %d", ret);
>
> You seem to be printing more precise messages in vd56g3_power_on() already.
Sure, linked with previous comment.
>
>> +
>> + return ret;
>> +}
>> +
>> +static int vd56g3_runtime_suspend(struct device *dev)
>> +{
>> + struct v4l2_subdev *sd = dev_get_drvdata(dev);
>> + struct vd56g3 *sensor = to_vd56g3(sd);
>> +
>> + return vd56g3_power_off(sensor);
>> +}
>> +
>> +static const struct dev_pm_ops vd56g3_pm_ops = {
>> + SET_RUNTIME_PM_OPS(vd56g3_runtime_suspend, vd56g3_runtime_resume, NULL)
>> +};
>> +
>> +/* -----------------------------------------------------------------------------
>> + * Probe and initialization
>> + */
>> +
>> +static int vd56g3_check_csi_conf(struct vd56g3 *sensor,
>> + struct fwnode_handle *endpoint)
>> +{
>> + struct i2c_client *client = sensor->i2c_client;
>> + struct v4l2_fwnode_endpoint ep = { .bus_type = V4L2_MBUS_CSI2_DPHY };
>> + u32 phy_data_lanes[VD56G3_MAX_CSI_DATA_LANES] = { ~0, ~0 };
>> + u8 n_lanes;
>> + u64 frequency;
>> + int p, l;
>> + int ret = 0;
>> +
>> + ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep);
>> + if (ret)
>> + return -EINVAL;
>> +
>> + /* Check lanes number */
>> + n_lanes = ep.bus.mipi_csi2.num_data_lanes;
>> + if (n_lanes != 1 && n_lanes != 2) {
>> + dev_err(&client->dev, "Invalid data lane number %d\n", n_lanes);
>> + ret = -EINVAL;
>> + goto done;
>> + }
>> + sensor->nb_of_lane = n_lanes;
>> +
>> + /* Clock lane must be first */
>> + if (ep.bus.mipi_csi2.clock_lane != 0) {
>> + dev_err(&client->dev, "Clk lane must be mapped to lane 0\n");
>> + ret = -EINVAL;
>> + goto done;
>> + }
>> +
>> + /* Prepare Output Interface conf based on lane settings
>
> /*
> * Multi-line
> * comment.
> */
Ok, will be fixed in V3.
>
>> + * logical to physical lane conversion (+ pad remaining slots)
>> + */
>> + for (l = 0; l < n_lanes; l++)
>> + phy_data_lanes[ep.bus.mipi_csi2.data_lanes[l] - 1] = l;
>> + for (p = 0; p < VD56G3_MAX_CSI_DATA_LANES; p++) {
>> + if (phy_data_lanes[p] != ~0)
>> + continue;
>> + phy_data_lanes[p] = l;
>> + l++;
>> + }
>> + sensor->oif_ctrl = n_lanes |
>> + (ep.bus.mipi_csi2.lane_polarities[0] << 3) |
>> + ((phy_data_lanes[0]) << 4) |
>> + (ep.bus.mipi_csi2.lane_polarities[1] << 6) |
>> + ((phy_data_lanes[1]) << 7) |
>> + (ep.bus.mipi_csi2.lane_polarities[2] << 9);
>> +
>> + /* Check link frequency */
>> + if (!ep.nr_of_link_frequencies) {
>> + dev_err(&client->dev, "link-frequency not found in DT\n");
>> + ret = -EINVAL;
>> + goto done;
>> + }
>> + frequency = (n_lanes == 2) ? VD56G3_LINK_FREQ_DEF_2LANES :
>> + VD56G3_LINK_FREQ_DEF_1LANE;
>> + if (ep.nr_of_link_frequencies != 1 ||
>> + ep.link_frequencies[0] != frequency) {
>> + dev_err(&client->dev, "Link frequency not supported: %lld\n",
>> + ep.link_frequencies[0]);
>> + ret = -EINVAL;
>> + goto done;
>> + }
>> +
>> +done:
>> + v4l2_fwnode_endpoint_free(&ep);
>> + return ret;
>> +}
>> +
>> +static int vd56g3_parse_dt_gpios_array(struct vd56g3 *sensor, char *prop_name,
>> + u32 *array, int *nb)
>> +{
>> + struct i2c_client *client = sensor->i2c_client;
>> + struct device_node *np = client->dev.of_node;
>> + unsigned int i;
>> +
>> + *nb = of_property_read_variable_u32_array(np, prop_name, array, 0,
>> + VD56G3_NB_GPIOS);
>> +
>> + if (*nb == -EINVAL) {
>> + *nb = 0;
>> + return *nb;
>> + } else if (*nb < 0) {
>> + dev_err(&client->dev, "Failed to read %s prop\n", prop_name);
>> + return *nb;
>> + }
>> +
>> + for (i = 0; i < *nb; i++) {
>> + if (array[i] >= VD56G3_NB_GPIOS) {
>> + dev_err(&client->dev, "Invalid GPIO : %d\n", array[i]);
>> + return -EINVAL;
>> + }
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int vd56g3_parse_dt_gpios(struct vd56g3 *sensor)
>> +{
>> + u32 led_gpios[VD56G3_NB_GPIOS];
>> + int nb_gpios_leds;
>> + unsigned int i;
>> + int ret;
>> +
>> + /* Initialize GPIOs to default */
>> + for (i = 0; i < VD56G3_NB_GPIOS; i++)
>> + sensor->gpios[i] = VD56G3_GPIOX_GPIO_IN;
>> + sensor->ext_leds_mask = 0;
>> +
>> + /* Take into account optional 'st,leds' output for GPIOs */
>> + ret = vd56g3_parse_dt_gpios_array(sensor, "st,leds", led_gpios,
>> + &nb_gpios_leds);
>> + if (ret)
>> + return ret;
>> + for (i = 0; i < nb_gpios_leds; i++) {
>> + sensor->gpios[led_gpios[i]] = VD56G3_GPIOX_STROBE_MODE;
>> + set_bit(led_gpios[i], &sensor->ext_leds_mask);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int vd56g3_parse_dt(struct vd56g3 *sensor)
>> +{
>> + struct i2c_client *client = sensor->i2c_client;
>> + struct device *dev = &client->dev;
>> + struct fwnode_handle *endpoint;
>> + int ret;
>> +
>> + endpoint = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 0);
>> + if (!endpoint) {
>> + dev_err(dev, "endpoint node not found\n");
>> + return -EINVAL;
>> + }
>> +
>> + ret = vd56g3_check_csi_conf(sensor, endpoint);
>> + fwnode_handle_put(endpoint);
>> + if (ret)
>> + return ret;
>> +
>> + return vd56g3_parse_dt_gpios(sensor);
>> +}
>> +
>> +static int vd56g3_get_regulators(struct vd56g3 *sensor)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(sensor->supplies); i++)
>> + sensor->supplies[i].supply = vd56g3_supply_names[i];
>> +
>> + return devm_regulator_bulk_get(&sensor->i2c_client->dev,
>> + ARRAY_SIZE(sensor->supplies),
>> + sensor->supplies);
>> +}
>> +
>> +static int vd56g3_prepare_clock_tree(struct vd56g3 *sensor)
>> +{
>> + struct i2c_client *client = sensor->i2c_client;
>> + const unsigned int predivs[] = { 1, 2, 4 };
>> + u32 pll_out;
>> + int i;
>> +
>> + /* External clock must be in [6Mhz-27Mhz] */
>> + if (sensor->xclk_freq < 6 * HZ_PER_MHZ ||
>> + sensor->xclk_freq > 27 * HZ_PER_MHZ) {
>> + dev_err(&client->dev,
>> + "Only 6Mhz-27Mhz clock range supported. Provided %lu MHz\n",
>> + sensor->xclk_freq / HZ_PER_MHZ);
>> + return -EINVAL;
>> + }
>> +
>> + /* PLL input should be in [6Mhz-12Mhz[ */
>> + for (i = 0; i < ARRAY_SIZE(predivs); i++) {
>> + sensor->pll_prediv = predivs[i];
>> + if (sensor->xclk_freq / sensor->pll_prediv < 12 * HZ_PER_MHZ)
>> + break;
>> + }
>> +
>> + /* PLL output clock must be as close as possible to 804Mhz */
>> + sensor->pll_mult = (VD56G3_TARGET_PLL * sensor->pll_prediv +
>> + sensor->xclk_freq / 2) /
>> + sensor->xclk_freq;
>> + pll_out = sensor->xclk_freq * sensor->pll_mult / sensor->pll_prediv;
>> +
>> + /* Target Pixel Clock for standard 10bit ADC mode : 160.8Mhz */
>> + sensor->pixel_clock = pll_out / VD56G3_VT_CLOCK_DIV;
>> +
>> + return 0;
>> +}
>> +
>> +static int vd56g3_detect(struct vd56g3 *sensor)
>> +{
>> + struct i2c_client *client = sensor->i2c_client;
>> + struct device *dev = &client->dev;
>> + unsigned int model;
>> + u64 model_id = 0;
>> + u64 device_revision = 0;
>> + u64 optical_revision = 0;
>> + int ret = 0;
>> +
>> + model = (uintptr_t)device_get_match_data(dev);
>> +
>> + cci_read(sensor->regmap, VD56G3_REG_MODEL_ID, &model_id, &ret);
>> + if (ret)
>> + return ret;
>
> As you're calling cci_read() and then checking ret, I'd assing ret here the
> usual way (and below, too).
>
Yes, better !
>> +
>> + if (model_id != VD56G3_MODEL_ID) {
>> + dev_err(&client->dev, "Unsupported sensor id %x",
>> + (u16)model_id);
>> + return -ENODEV;
>> + }
>> +
>> + cci_read(sensor->regmap, VD56G3_REG_REVISION, &device_revision, &ret);
>> + if (ret)
>> + return ret;
>> +
>> + if ((device_revision >> 8) != VD56G3_REVISION_CUT3) {
>> + dev_err(&client->dev, "Unsupported Cut version %x",
>> + (u16)device_revision);
>> + return -ENODEV;
>> + }
>> +
>> + cci_read(sensor->regmap, VD56G3_REG_OPTICAL_REVISION, &optical_revision,
>> + &ret);
>> + if (ret)
>> + return ret;
>> +
>> + sensor->is_mono =
>> + ((optical_revision & 1) == VD56G3_OPTICAL_REVISION_MONO);
>> + if ((sensor->is_mono && model == VD56G3_MODEL_VD66GY) ||
>> + (!sensor->is_mono && model == VD56G3_MODEL_VD56G3)) {
>> + dev_err(&client->dev,
>> + "Found %s sensor, while %s model is defined in DT",
>> + (sensor->is_mono) ? "Mono" : "Bayer",
>> + (model == VD56G3_MODEL_VD56G3) ? "vd56g3" : "vd66gy");
>> + return -ENODEV;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int vd56g3_subdev_init(struct vd56g3 *sensor)
>> +{
>> + struct i2c_client *client = sensor->i2c_client;
>> + int ret;
>> +
>> + /* Init sub device */
>> + v4l2_i2c_subdev_init(&sensor->sd, client, &vd56g3_subdev_ops);
>> + sensor->sd.internal_ops = &vd56g3_internal_ops;
>> + sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
>> + V4L2_SUBDEV_FL_HAS_EVENTS;
>> + sensor->sd.entity.ops = &vd56g3_subdev_entity_ops;
>> +
>> + /* Init source pad */
>> + sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
>> + sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
>> + ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
>> + if (ret) {
>> + dev_err(&client->dev, "Failed to init media entity : %d", ret);
>> + return ret;
>> + }
>> +
>> + /* Init controls */
>> + ret = vd56g3_init_controls(sensor);
>> + if (ret) {
>> + dev_err(&client->dev, "Controls initialization failed %d", ret);
>> + goto err_media;
>> + }
>> +
>> + /* Init vd56g3 struct : default resolution + raw8 */
>> + sensor->sd.state_lock = sensor->ctrl_handler.lock;
>> + ret = v4l2_subdev_init_finalize(&sensor->sd);
>> + if (ret) {
>> + dev_err(&client->dev, "subdev init error: %d", ret);
>> + goto err_ctrls;
>> + }
>> +
>> + return vd56g3_update_controls(sensor);
>> +
>> +err_ctrls:
>> + v4l2_ctrl_handler_free(sensor->sd.ctrl_handler);
>> +
>> +err_media:
>> + media_entity_cleanup(&sensor->sd.entity);
>
> Newline here?
Yes, there's a few others newline missing, will be fixed in V3.
>
>> + return ret;
>> +}
>> +
>> +static void vd56g3_subdev_cleanup(struct vd56g3 *sensor)
>> +{
>> + v4l2_async_unregister_subdev(&sensor->sd);
>> + v4l2_subdev_cleanup(&sensor->sd);
>> + media_entity_cleanup(&sensor->sd.entity);
>> + v4l2_ctrl_handler_free(sensor->sd.ctrl_handler);
>> +}
>> +
>> +static int vd56g3_probe(struct i2c_client *client)
>> +{
>> + struct device *dev = &client->dev;
>> + struct vd56g3 *sensor;
>> + int ret;
>> +
>> + sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
>> + if (!sensor)
>> + return -ENOMEM;
>> +
>> + sensor->i2c_client = client;
>> +
>> + ret = vd56g3_parse_dt(sensor);
>> + if (ret)
>> + return dev_err_probe(dev, ret, "Failed to parse Device Tree.");
>> +
>> + /* Get (and check) resources : power regs, ext clock, reset gpio */
>> + ret = vd56g3_get_regulators(sensor);
>> + if (ret)
>> + return dev_err_probe(dev, ret, "Failed to get regulators.");
>> +
>> + sensor->xclk = devm_clk_get(dev, NULL);
>> + if (IS_ERR(sensor->xclk))
>> + return dev_err_probe(dev, PTR_ERR(sensor->xclk),
>> + "Failed to get xclk.");
>> + sensor->xclk_freq = clk_get_rate(sensor->xclk);
>> + ret = vd56g3_prepare_clock_tree(sensor);
>> + if (ret)
>> + return ret;
>> +
>> + sensor->reset_gpio =
>> + devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
>> + if (IS_ERR(sensor->reset_gpio))
>> + return dev_err_probe(dev, PTR_ERR(sensor->reset_gpio),
>> + "Failed to get reset gpio.");
>> +
>> + sensor->regmap = devm_cci_regmap_init_i2c(client, 16);
>> + if (IS_ERR(sensor->regmap))
>> + return dev_err_probe(dev, PTR_ERR(sensor->regmap),
>> + "Failed to init regmap.");
>> +
>> + /* Power ON */
>> + ret = vd56g3_power_on(sensor);
>> + if (ret)
>> + return dev_err_probe(dev, ret, "Sensor power on failed.");
>> +
>> + /* Enable PM runtime with autosuspend (sensor being ON, set active) */
>> + pm_runtime_set_active(dev);
>> + pm_runtime_get_noresume(dev);
>> + pm_runtime_enable(dev);
>> + pm_runtime_set_autosuspend_delay(dev, 1000);
>> + pm_runtime_use_autosuspend(dev);
>> +
>> + /* Check HW model/version */
>> + ret = vd56g3_detect(sensor);
>> + if (ret) {
>> + dev_err(&client->dev, "Sensor detect failed : %d", ret);
>> + goto err_power_off;
>> + }
>> +
>> + /* Initialize, then register V4L2 subdev */
>> + ret = vd56g3_subdev_init(sensor);
>> + if (ret) {
>> + dev_err(&client->dev, "V4l2 init failed : %d", ret);
>> + goto err_power_off;
>> + }
>> +
>> + ret = v4l2_async_register_subdev(&sensor->sd);
>> + if (ret) {
>> + dev_err(&client->dev, "async subdev register failed %d", ret);
>> + goto err_subdev;
>> + }
>> +
>> + /* Sensor could now be powered off (after the autosuspend delay) */
>> + pm_runtime_mark_last_busy(dev);
>> + pm_runtime_put_autosuspend(dev);
>> +
>> + dev_dbg(&client->dev, "Successfully probe %s sensor",
>> + (sensor->is_mono) ? "vd56g3" : "vd66gy");
>> +
>> + return 0;
>> +
>> +err_subdev:
>> + vd56g3_subdev_cleanup(sensor);
>> +err_power_off:
>> + pm_runtime_disable(dev);
>> + pm_runtime_put_noidle(dev);
>> + vd56g3_power_off(sensor);
>
> A newline here?
Ok
>
>> + return ret;
>> +}
>> +
>> +static void vd56g3_remove(struct i2c_client *client)
>> +{
>> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
>> + struct vd56g3 *sensor = to_vd56g3(sd);
>> +
>> + vd56g3_subdev_cleanup(sensor);
>> +
>> + pm_runtime_disable(&client->dev);
>> + if (!pm_runtime_status_suspended(&client->dev))
>> + vd56g3_power_off(sensor);
>> + pm_runtime_set_suspended(&client->dev);
>> +}
>> +
>> +static const struct of_device_id vd56g3_dt_ids[] = {
>> + { .compatible = "st,st-vd56g3", .data = (void *)VD56G3_MODEL_VD56G3 },
>> + { .compatible = "st,st-vd66gy", .data = (void *)VD56G3_MODEL_VD66GY },
>> + { /* sentinel */ }
>> +};
>> +MODULE_DEVICE_TABLE(of, vd56g3_dt_ids);
>> +
>> +static struct i2c_driver vd56g3_i2c_driver = {
>> + .driver = {
>> + .name = "st-vd56g3",
>> + .of_match_table = vd56g3_dt_ids,
>> + .pm = &vd56g3_pm_ops,
>> + },
>> + .probe = vd56g3_probe,
>> + .remove = vd56g3_remove,
>> +};
>> +
>> +module_i2c_driver(vd56g3_i2c_driver);
>> +
>> +MODULE_AUTHOR("Benjamin Mugnier <benjamin.mugnier@xxxxxxxxxxx>");
>> +MODULE_AUTHOR("Mickael Guene <mickael.guene@xxxxxx>");
>> +MODULE_AUTHOR("Sylvain Petinot <sylvain.petinot@xxxxxxxxxxx>");
>> +MODULE_DESCRIPTION("ST VD56G3 sensor driver");
>> +MODULE_LICENSE("GPL");
>
--
Sylvain
