Hi Vishal, In probe(), it calls imx274_load_default(imx274), which has I2C register read/write to the IMX274. If it fails, it will exit probe(). So it works as a sensor detection function as you suggested. Regards, Leon Luo 1130 Cadillac CT Milpitas, CA 95035 Phone: (510)371-1169 Fax: (408) 217-1960 Email: leonl@xxxxxxxxxxxxxxxxxx www.leopardimaging.com On Thu, Nov 2, 2017 at 9:36 PM, Vishal Sagar <vsagar@xxxxxxxxxx> wrote: > Hi Leon, > > I understand this fixes correctly freeing the v4l control handlers in probe(). > > But if there is a scenario where the sensor is mounted on a removable daughter card, > shouldn't the probe fail if the daughter card is not connected? > A sample read/write to an IMX274 register should be sufficient to confirm this in the probe() and fail. > > Does it make sense to add this in the probe()? > > Regards > Vishal Sagar > >> -----Original Message----- >> From: linux-media-owner@xxxxxxxxxxxxxxx [mailto:linux-media- >> owner@xxxxxxxxxxxxxxx] On Behalf Of Leon Luo >> Sent: Thursday, October 26, 2017 12:21 PM >> To: mchehab@xxxxxxxxxx; robh+dt@xxxxxxxxxx; mark.rutland@xxxxxxx; >> hans.verkuil@xxxxxxxxx; sakari.ailus@xxxxxxxxxxxxxxx >> Cc: linux-media@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; linux- >> kernel@xxxxxxxxxxxxxxx; leonl@xxxxxxxxxxxxxxxxxx; Soren Brinkmann >> <sorenb@xxxxxxxxxxxxxxx> >> Subject: [PATCH v9 2/2] media:imx274 V4l2 driver for Sony imx274 CMOS sensor >> >> The imx274 is a Sony CMOS image sensor that has 1/2.5 image size. >> It supports up to 3840x2160 (4K) 60fps, 1080p 120fps. The interface >> is 4-lane MIPI CSI-2 running at 1.44Gbps each. >> >> This driver has been tested on Xilinx ZCU102 platform with a Leopard >> LI-IMX274MIPI-FMC camera board. >> >> Support for the following features: >> -Resolutions: 3840x2160, 1920x1080, 1280x720 >> -Frame rate: 3840x2160 : 5 – 60fps >> 1920x1080 : 5 – 120fps >> 1280x720 : 5 – 120fps >> -Exposure time: 16 – (frame interval) micro-seconds >> -Gain: 1x - 180x >> -VFLIP: enable/disabledrivers/media/i2c/imx274.c >> -Test pattern: 12 test patterns >> >> Signed-off-by: Leon Luo <leonl@xxxxxxxxxxxxxxxxxx> >> Tested-by: Sören Brinkmann <soren.brinkmann@xxxxxxxxxx> >> Acked-by: Sakari Ailus <sakari.ailus@xxxxxx> >> Acked-by: Chris Kohn <ckohn@xxxxxxxxxx> >> --- >> v9: >> - remove v4l2_async_unregister_subdev from probe error >> v8: >> - check division by zero error >> v7: >> - use __v4l2_ctrl_s_ctrl instead of v4l2_ctrl_s_ctrl to have >> clean mutex_lock/mutex_unlock in imx274_s_stream() >> - define imx274_tp_regs[] as static, move the test pattern reg >> out of imx274_tp_regs[], and define it as a macro >> IMX274_TEST_PATTERN_REG >> v6: >> - remove media/v4l2-image-sizes.h from include header >> - make the header file alphabetical order >> - remove fmt->pad check in imx274_get_fmt, >> the V4L2 subdev framework does it already >> - change 'struct reg_8 *regs' to 'struct reg_8 regs[n]', >> where n is the exact numbers needed for this function >> - move MODULE_DEVICE_TABLE(of, imx274_of_id_table); closer >> to imx274_of_id_table definition >> - remove return check of imx274_write_table in imx274_remove, >> because it should remove all resources even i2c fails here >> - move imx274_load_default before v4l2_async_register_subdev >> v5: >> - no changes >> v4: >> - use 32-bit data type to avoid __divdi3 compile error for i386 >> - clean up OR together error codesdrivers/media/i2c/imx274.c >> v3: >> - clean up header files >> - use struct directly instead of alias #define >> - use v4l2_ctrl_s_ctrl instead of v4l2_s_ctrl >> - revise debug output >> - move static helpers closer to their call site >> - don't OR toegether error codes >> - use closest valid gain value instead of erroring out >> - assigne lock to the control handler and omit explicit locking >> - acquire mutex lock for imx274_get_fmt >> - remove format->pad check in imx274_set_fmt since the pad is always 0 >> - pass struct v4l2_ctrl pointer in gain/exposure/vlip/test pattern controls >> - remove priv->ctrls.vflip->val = val in imx274_set_vflip() >> - remove priv->ctrls.test_pattern->val = val in imx274_set_test_pattern() >> - remove empty open/close callbacks >> - remove empty core ops >> - add more error labels in probe >> - use v4l2_async_unregister_subdev instead of v4l2_device_unregister_subdev >> - use dynamic debug >> - split start_stream to two steps: imx274_mode_regs() and >> imx274_start_stream() >> frame rate & exposure can be updated >> between imx274_mode_regs() & imx274_start_stream() >> >> v2: >> - Fix Kconfig to not remove existing options >> --- >> drivers/media/i2c/Kconfig | 7 + >> drivers/media/i2c/Makefile | 1 + >> drivers/media/i2c/imx274.c | 1810 >> ++++++++++++++++++++++++++++++++++++++++++++ >> 3 files changed, 1818 insertions(+) >> create mode 100644 drivers/media/i2c/imx274.c >> >> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig >> index 47113774a297..9659849e33a0 100644 >> --- a/drivers/media/i2c/Kconfig >> +++ b/drivers/media/i2c/Kconfig >> @@ -555,6 +555,13 @@ config VIDEO_APTINA_PLL >> config VIDEO_SMIAPP_PLL >> tristate >> >> +config VIDEO_IMX274 >> + tristate "Sony IMX274 sensor support" >> + depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API >> + ---help--- >> + This is a V4L2 sensor-level driver for the Sony IMX274 >> + CMOS image sensor. >> + >> config VIDEO_OV2640 >> tristate "OmniVision OV2640 sensor support" >> depends on VIDEO_V4L2 && I2C >> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile >> index c843c181dfb9..f8d57e453936 100644 >> --- a/drivers/media/i2c/Makefile >> +++ b/drivers/media/i2c/Makefile >> @@ -92,5 +92,6 @@ obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o >> obj-$(CONFIG_VIDEO_ML86V7667) += ml86v7667.o >> obj-$(CONFIG_VIDEO_OV2659) += ov2659.o >> obj-$(CONFIG_VIDEO_TC358743) += tc358743.o >> +obj-$(CONFIG_VIDEO_IMX274) += imx274.o >> >> obj-$(CONFIG_SDR_MAX2175) += max2175.o >> diff --git a/drivers/media/i2c/imx274.c b/drivers/media/i2c/imx274.c >> new file mode 100644 >> index 000000000000..737dbf59a0d2 >> --- /dev/null >> +++ b/drivers/media/i2c/imx274.c >> @@ -0,0 +1,1810 @@ >> +/* >> + * imx274.c - IMX274 CMOS Image Sensor driver >> + * >> + * Copyright (C) 2017, Leopard Imaging, Inc. >> + * >> + * Leon Luo <leonl@xxxxxxxxxxxxxxxxxx> >> + * Edwin Zou <edwinz@xxxxxxxxxxxxxxxxxx> >> + * >> + * This program is free software; you can redistribute it and/or modify it >> + * under the terms and conditions of the GNU General Public License, >> + * version 2, as published by the Free Software Foundation. >> + * >> + * This program is distributed in the hope it will be useful, but WITHOUT >> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY >> or >> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License >> for >> + * more details. >> + * >> + * You should have received a copy of the GNU General Public License >> + * along with this program. If not, see <http://www.gnu.org/licenses/>. >> + */ >> + >> +#include <linux/clk.h> >> +#include <linux/delay.h> >> +#include <linux/gpio.h> >> +#include <linux/gpio/consumer.h> >> +#include <linux/i2c.h> >> +#include <linux/init.h> >> +#include <linux/module.h> >> +#include <linux/of_gpio.h> >> +#include <linux/regmap.h> >> +#include <linux/slab.h> >> +#include <linux/v4l2-mediabus.h> >> +#include <linux/videodev2.h> >> + >> +#include <media/v4l2-ctrls.h> >> +#include <media/v4l2-device.h> >> +#include <media/v4l2-subdev.h> >> + >> +/* >> + * See "SHR, SVR Setting" in datasheet >> + */ >> +#define IMX274_DEFAULT_FRAME_LENGTH (4550) >> +#define IMX274_MAX_FRAME_LENGTH (0x000fffff) >> + >> +/* >> + * See "Frame Rate Adjustment" in datasheet >> + */ >> +#define IMX274_PIXCLK_CONST1 (72000000) >> +#define IMX274_PIXCLK_CONST2 (1000000) >> + >> +/* >> + * The input gain is shifted by IMX274_GAIN_SHIFT to get >> + * decimal number. The real gain is >> + * (float)input_gain_value / (1 << IMX274_GAIN_SHIFT) >> + */ >> +#define IMX274_GAIN_SHIFT (8) >> +#define IMX274_GAIN_SHIFT_MASK ((1 << >> IMX274_GAIN_SHIFT) - 1) >> + >> +/* >> + * See "Analog Gain" and "Digital Gain" in datasheet >> + * min gain is 1X >> + * max gain is calculated based on IMX274_GAIN_REG_MAX >> + */ >> +#define IMX274_GAIN_REG_MAX (1957) >> +#define IMX274_MIN_GAIN (0x01 << >> IMX274_GAIN_SHIFT) >> +#define IMX274_MAX_ANALOG_GAIN ((2048 << >> IMX274_GAIN_SHIFT)\ >> + / (2048 - IMX274_GAIN_REG_MAX)) >> +#define IMX274_MAX_DIGITAL_GAIN (8) >> +#define IMX274_DEF_GAIN (20 << >> IMX274_GAIN_SHIFT) >> +#define IMX274_GAIN_CONST (2048) /* for gain formula */ >> + >> +/* >> + * 1 line time in us = (HMAX / 72), minimal is 4 lines >> + */ >> +#define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72) >> + >> +#define IMX274_DEFAULT_MODE >> IMX274_MODE_3840X2160 >> +#define IMX274_MAX_WIDTH (3840) >> +#define IMX274_MAX_HEIGHT (2160) >> +#define IMX274_MAX_FRAME_RATE (120) >> +#define IMX274_MIN_FRAME_RATE (5) >> +#define IMX274_DEF_FRAME_RATE (60) >> + >> +/* >> + * register SHR is limited to (SVR value + 1) x VMAX value - 4 >> + */ >> +#define IMX274_SHR_LIMIT_CONST (4) >> + >> +/* >> + * Constants for sensor reset delay >> + */ >> +#define IMX274_RESET_DELAY1 (2000) >> +#define IMX274_RESET_DELAY2 (2200) >> + >> +/* >> + * shift and mask constants >> + */ >> +#define IMX274_SHIFT_8_BITS (8) >> +#define IMX274_SHIFT_16_BITS (16) >> +#define IMX274_MASK_LSB_2_BITS (0x03) >> +#define IMX274_MASK_LSB_3_BITS (0x07) >> +#define IMX274_MASK_LSB_4_BITS (0x0f) >> +#define IMX274_MASK_LSB_8_BITS (0x00ff) >> + >> +#define DRIVER_NAME "IMX274" >> + >> +/* >> + * IMX274 register definitions >> + */ >> +#define IMX274_FRAME_LENGTH_ADDR_1 0x30FA /* VMAX, MSB >> */ >> +#define IMX274_FRAME_LENGTH_ADDR_2 0x30F9 /* VMAX */ >> +#define IMX274_FRAME_LENGTH_ADDR_3 0x30F8 /* VMAX, LSB >> */ >> +#define IMX274_SVR_REG_MSB 0x300F /* SVR */ >> +#define IMX274_SVR_REG_LSB 0x300E /* SVR */ >> +#define IMX274_HMAX_REG_MSB 0x30F7 /* HMAX */ >> +#define IMX274_HMAX_REG_LSB 0x30F6 /* HMAX */ >> +#define IMX274_COARSE_TIME_ADDR_MSB 0x300D /* SHR */ >> +#define IMX274_COARSE_TIME_ADDR_LSB 0x300C /* SHR */ >> +#define IMX274_ANALOG_GAIN_ADDR_LSB 0x300A /* ANALOG >> GAIN LSB */ >> +#define IMX274_ANALOG_GAIN_ADDR_MSB 0x300B /* ANALOG >> GAIN MSB */ >> +#define IMX274_DIGITAL_GAIN_REG 0x3012 /* Digital Gain >> */ >> +#define IMX274_VFLIP_REG 0x301A /* VERTICAL FLIP */ >> +#define IMX274_TEST_PATTERN_REG 0x303D /* TEST >> PATTERN */ >> +#define IMX274_STANDBY_REG 0x3000 /* STANDBY */ >> + >> +#define IMX274_TABLE_WAIT_MS 0 >> +#define IMX274_TABLE_END 1 >> + >> +/* >> + * imx274 I2C operation related structure >> + */ >> +struct reg_8 { >> + u16 addr; >> + u8 val; >> +}; >> + >> +static const struct regmap_config imx274_regmap_config = { >> + .reg_bits = 16, >> + .val_bits = 8, >> + .cache_type = REGCACHE_RBTREE, >> +}; >> + >> +enum imx274_mode { >> + IMX274_MODE_3840X2160, >> + IMX274_MODE_1920X1080, >> + IMX274_MODE_1280X720, >> + >> + IMX274_MODE_START_STREAM_1, >> + IMX274_MODE_START_STREAM_2, >> + IMX274_MODE_START_STREAM_3, >> + IMX274_MODE_START_STREAM_4, >> + IMX274_MODE_STOP_STREAM >> +}; >> + >> +/* >> + * imx274 format related structure >> + */ >> +struct imx274_frmfmt { >> + u32 mbus_code; >> + enum v4l2_colorspace colorspace; >> + struct v4l2_frmsize_discrete size; >> + enum imx274_mode mode; >> +}; >> + >> +/* >> + * imx274 test pattern related structure >> + */ >> +enum { >> + TEST_PATTERN_DISABLED = 0, >> + TEST_PATTERN_ALL_000H, >> + TEST_PATTERN_ALL_FFFH, >> + TEST_PATTERN_ALL_555H, >> + TEST_PATTERN_ALL_AAAH, >> + TEST_PATTERN_VSP_5AH, /* VERTICAL STRIPE PATTERN 555H/AAAH */ >> + TEST_PATTERN_VSP_A5H, /* VERTICAL STRIPE PATTERN AAAH/555H */ >> + TEST_PATTERN_VSP_05H, /* VERTICAL STRIPE PATTERN 000H/555H */ >> + TEST_PATTERN_VSP_50H, /* VERTICAL STRIPE PATTERN 555H/000H */ >> + TEST_PATTERN_VSP_0FH, /* VERTICAL STRIPE PATTERN 000H/FFFH */ >> + TEST_PATTERN_VSP_F0H, /* VERTICAL STRIPE PATTERN FFFH/000H */ >> + TEST_PATTERN_H_COLOR_BARS, >> + TEST_PATTERN_V_COLOR_BARS, >> +}; >> + >> +static const char * const tp_qmenu[] = { >> + "Disabled", >> + "All 000h Pattern", >> + "All FFFh Pattern", >> + "All 555h Pattern", >> + "All AAAh Pattern", >> + "Vertical Stripe (555h / AAAh)", >> + "Vertical Stripe (AAAh / 555h)", >> + "Vertical Stripe (000h / 555h)", >> + "Vertical Stripe (555h / 000h)", >> + "Vertical Stripe (000h / FFFh)", >> + "Vertical Stripe (FFFh / 000h)", >> + "Horizontal Color Bars", >> + "Vertical Color Bars", >> +}; >> + >> +/* >> + * All-pixel scan mode (10-bit) >> + * imx274 mode1(refer to datasheet) register configuration with >> + * 3840x2160 resolution, raw10 data and mipi four lane output >> + */ >> +static const struct reg_8 imx274_mode1_3840x2160_raw10[] = { >> + {0x3004, 0x01}, >> + {0x3005, 0x01}, >> + {0x3006, 0x00}, >> + {0x3007, 0x02}, >> + >> + {0x3018, 0xA2}, /* output XVS, HVS */ >> + >> + {0x306B, 0x05}, >> + {0x30E2, 0x01}, >> + {0x30F6, 0x07}, /* HMAX, 263 */ >> + {0x30F7, 0x01}, /* HMAX */ >> + >> + {0x30dd, 0x01}, /* crop to 2160 */ >> + {0x30de, 0x06}, >> + {0x30df, 0x00}, >> + {0x30e0, 0x12}, >> + {0x30e1, 0x00}, >> + {0x3037, 0x01}, /* to crop to 3840 */ >> + {0x3038, 0x0c}, >> + {0x3039, 0x00}, >> + {0x303a, 0x0c}, >> + {0x303b, 0x0f}, >> + >> + {0x30EE, 0x01}, >> + {0x3130, 0x86}, >> + {0x3131, 0x08}, >> + {0x3132, 0x7E}, >> + {0x3133, 0x08}, >> + {0x3342, 0x0A}, >> + {0x3343, 0x00}, >> + {0x3344, 0x16}, >> + {0x3345, 0x00}, >> + {0x33A6, 0x01}, >> + {0x3528, 0x0E}, >> + {0x3554, 0x1F}, >> + {0x3555, 0x01}, >> + {0x3556, 0x01}, >> + {0x3557, 0x01}, >> + {0x3558, 0x01}, >> + {0x3559, 0x00}, >> + {0x355A, 0x00}, >> + {0x35BA, 0x0E}, >> + {0x366A, 0x1B}, >> + {0x366B, 0x1A}, >> + {0x366C, 0x19}, >> + {0x366D, 0x17}, >> + {0x3A41, 0x08}, >> + >> + {IMX274_TABLE_END, 0x00} >> +}; >> + >> +/* >> + * Horizontal/vertical 2/2-line binning >> + * (Horizontal and vertical weightedbinning, 10-bit) >> + * imx274 mode3(refer to datasheet) register configuration with >> + * 1920x1080 resolution, raw10 data and mipi four lane output >> + */ >> +static const struct reg_8 imx274_mode3_1920x1080_raw10[] = { >> + {0x3004, 0x02}, >> + {0x3005, 0x21}, >> + {0x3006, 0x00}, >> + {0x3007, 0x11}, >> + >> + {0x3018, 0xA2}, /* output XVS, HVS */ >> + >> + {0x306B, 0x05}, >> + {0x30E2, 0x02}, >> + >> + {0x30F6, 0x04}, /* HMAX, 260 */ >> + {0x30F7, 0x01}, /* HMAX */ >> + >> + {0x30dd, 0x01}, /* to crop to 1920x1080 */ >> + {0x30de, 0x05}, >> + {0x30df, 0x00}, >> + {0x30e0, 0x04}, >> + {0x30e1, 0x00}, >> + {0x3037, 0x01}, >> + {0x3038, 0x0c}, >> + {0x3039, 0x00}, >> + {0x303a, 0x0c}, >> + {0x303b, 0x0f}, >> + >> + {0x30EE, 0x01}, >> + {0x3130, 0x4E}, >> + {0x3131, 0x04}, >> + {0x3132, 0x46}, >> + {0x3133, 0x04}, >> + {0x3342, 0x0A}, >> + {0x3343, 0x00}, >> + {0x3344, 0x1A}, >> + {0x3345, 0x00}, >> + {0x33A6, 0x01}, >> + {0x3528, 0x0E}, >> + {0x3554, 0x00}, >> + {0x3555, 0x01}, >> + {0x3556, 0x01}, >> + {0x3557, 0x01}, >> + {0x3558, 0x01}, >> + {0x3559, 0x00}, >> + {0x355A, 0x00}, >> + {0x35BA, 0x0E}, >> + {0x366A, 0x1B}, >> + {0x366B, 0x1A}, >> + {0x366C, 0x19}, >> + {0x366D, 0x17}, >> + {0x3A41, 0x08}, >> + >> + {IMX274_TABLE_END, 0x00} >> +}; >> + >> +/* >> + * Vertical 2/3 subsampling binning horizontal 3 binning >> + * imx274 mode5(refer to datasheet) register configuration with >> + * 1280x720 resolution, raw10 data and mipi four lane output >> + */ >> +static const struct reg_8 imx274_mode5_1280x720_raw10[] = { >> + {0x3004, 0x03}, >> + {0x3005, 0x31}, >> + {0x3006, 0x00}, >> + {0x3007, 0x09}, >> + >> + {0x3018, 0xA2}, /* output XVS, HVS */ >> + >> + {0x306B, 0x05}, >> + {0x30E2, 0x03}, >> + >> + {0x30F6, 0x04}, /* HMAX, 260 */ >> + {0x30F7, 0x01}, /* HMAX */ >> + >> + {0x30DD, 0x01}, >> + {0x30DE, 0x07}, >> + {0x30DF, 0x00}, >> + {0x40E0, 0x04}, >> + {0x30E1, 0x00}, >> + {0x3030, 0xD4}, >> + {0x3031, 0x02}, >> + {0x3032, 0xD0}, >> + {0x3033, 0x02}, >> + >> + {0x30EE, 0x01}, >> + {0x3130, 0xE2}, >> + {0x3131, 0x02}, >> + {0x3132, 0xDE}, >> + {0x3133, 0x02}, >> + {0x3342, 0x0A}, >> + {0x3343, 0x00}, >> + {0x3344, 0x1B}, >> + {0x3345, 0x00}, >> + {0x33A6, 0x01}, >> + {0x3528, 0x0E}, >> + {0x3554, 0x00}, >> + {0x3555, 0x01}, >> + {0x3556, 0x01}, >> + {0x3557, 0x01}, >> + {0x3558, 0x01}, >> + {0x3559, 0x00}, >> + {0x355A, 0x00}, >> + {0x35BA, 0x0E}, >> + {0x366A, 0x1B}, >> + {0x366B, 0x19}, >> + {0x366C, 0x17}, >> + {0x366D, 0x17}, >> + {0x3A41, 0x04}, >> + >> + {IMX274_TABLE_END, 0x00} >> +}; >> + >> +/* >> + * imx274 first step register configuration for >> + * starting stream >> + */ >> +static const struct reg_8 imx274_start_1[] = { >> + {IMX274_STANDBY_REG, 0x12}, >> + {IMX274_TABLE_END, 0x00} >> +}; >> + >> +/* >> + * imx274 second step register configuration for >> + * starting stream >> + */ >> +static const struct reg_8 imx274_start_2[] = { >> + {0x3120, 0xF0}, /* clock settings */ >> + {0x3121, 0x00}, /* clock settings */ >> + {0x3122, 0x02}, /* clock settings */ >> + {0x3129, 0x9C}, /* clock settings */ >> + {0x312A, 0x02}, /* clock settings */ >> + {0x312D, 0x02}, /* clock settings */ >> + >> + {0x310B, 0x00}, >> + >> + /* PLSTMG */ >> + {0x304C, 0x00}, /* PLSTMG01 */ >> + {0x304D, 0x03}, >> + {0x331C, 0x1A}, >> + {0x331D, 0x00}, >> + {0x3502, 0x02}, >> + {0x3529, 0x0E}, >> + {0x352A, 0x0E}, >> + {0x352B, 0x0E}, >> + {0x3538, 0x0E}, >> + {0x3539, 0x0E}, >> + {0x3553, 0x00}, >> + {0x357D, 0x05}, >> + {0x357F, 0x05}, >> + {0x3581, 0x04}, >> + {0x3583, 0x76}, >> + {0x3587, 0x01}, >> + {0x35BB, 0x0E}, >> + {0x35BC, 0x0E}, >> + {0x35BD, 0x0E}, >> + {0x35BE, 0x0E}, >> + {0x35BF, 0x0E}, >> + {0x366E, 0x00}, >> + {0x366F, 0x00}, >> + {0x3670, 0x00}, >> + {0x3671, 0x00}, >> + >> + /* PSMIPI */ >> + {0x3304, 0x32}, /* PSMIPI1 */ >> + {0x3305, 0x00}, >> + {0x3306, 0x32}, >> + {0x3307, 0x00}, >> + {0x3590, 0x32}, >> + {0x3591, 0x00}, >> + {0x3686, 0x32}, >> + {0x3687, 0x00}, >> + >> + {IMX274_TABLE_END, 0x00} >> +}; >> + >> +/* >> + * imx274 third step register configuration for >> + * starting stream >> + */ >> +static const struct reg_8 imx274_start_3[] = { >> + {IMX274_STANDBY_REG, 0x00}, >> + {0x303E, 0x02}, /* SYS_MODE = 2 */ >> + {IMX274_TABLE_END, 0x00} >> +}; >> + >> +/* >> + * imx274 forth step register configuration for >> + * starting stream >> + */ >> +static const struct reg_8 imx274_start_4[] = { >> + {0x30F4, 0x00}, >> + {0x3018, 0xA2}, /* XHS VHS OUTUPT */ >> + {IMX274_TABLE_END, 0x00} >> +}; >> + >> +/* >> + * imx274 register configuration for stoping stream >> + */ >> +static const struct reg_8 imx274_stop[] = { >> + {IMX274_STANDBY_REG, 0x01}, >> + {IMX274_TABLE_END, 0x00} >> +}; >> + >> +/* >> + * imx274 disable test pattern register configuration >> + */ >> +static const struct reg_8 imx274_tp_disabled[] = { >> + {0x303C, 0x00}, >> + {0x377F, 0x00}, >> + {0x3781, 0x00}, >> + {0x370B, 0x00}, >> + {IMX274_TABLE_END, 0x00} >> +}; >> + >> +/* >> + * imx274 test pattern register configuration >> + * reg 0x303D defines the test pattern modes >> + */ >> +static const struct reg_8 imx274_tp_regs[] = { >> + {0x303C, 0x11}, >> + {0x370E, 0x01}, >> + {0x377F, 0x01}, >> + {0x3781, 0x01}, >> + {0x370B, 0x11}, >> + {IMX274_TABLE_END, 0x00} >> +}; >> + >> +static const struct reg_8 *mode_table[] = { >> + [IMX274_MODE_3840X2160] = >> imx274_mode1_3840x2160_raw10, >> + [IMX274_MODE_1920X1080] = >> imx274_mode3_1920x1080_raw10, >> + [IMX274_MODE_1280X720] = >> imx274_mode5_1280x720_raw10, >> + >> + [IMX274_MODE_START_STREAM_1] = imx274_start_1, >> + [IMX274_MODE_START_STREAM_2] = imx274_start_2, >> + [IMX274_MODE_START_STREAM_3] = imx274_start_3, >> + [IMX274_MODE_START_STREAM_4] = imx274_start_4, >> + [IMX274_MODE_STOP_STREAM] = imx274_stop, >> +}; >> + >> +/* >> + * imx274 format related structure >> + */ >> +static const struct imx274_frmfmt imx274_formats[] = { >> + {MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_COLORSPACE_SRGB, {3840, >> 2160}, >> + IMX274_MODE_3840X2160}, >> + {MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_COLORSPACE_SRGB, {1920, >> 1080}, >> + IMX274_MODE_1920X1080}, >> + {MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_COLORSPACE_SRGB, {1280, >> 720}, >> + IMX274_MODE_1280X720}, >> +}; >> + >> +/* >> + * minimal frame length for each mode >> + * refer to datasheet section "Frame Rate Adjustment (CSI-2)" >> + */ >> +static const int min_frame_len[] = { >> + 4550, /* mode 1, 4K */ >> + 2310, /* mode 3, 1080p */ >> + 2310 /* mode 5, 720p */ >> +}; >> + >> +/* >> + * minimal numbers of SHR register >> + * refer to datasheet table "Shutter Setting (CSI-2)" >> + */ >> +static const int min_SHR[] = { >> + 12, /* mode 1, 4K */ >> + 8, /* mode 3, 1080p */ >> + 8 /* mode 5, 720p */ >> +}; >> + >> +static const int max_frame_rate[] = { >> + 60, /* mode 1 , 4K */ >> + 120, /* mode 3, 1080p */ >> + 120 /* mode 5, 720p */ >> +}; >> + >> +/* >> + * Number of clocks per internal offset period >> + * a constant based on mode >> + * refer to section "Integration Time in Each Readout Drive Mode (CSI-2)" >> + * in the datasheet >> + * for the implemented 3 modes, it happens to be the same number >> + */ >> +static const int nocpiop[] = { >> + 112, /* mode 1 , 4K */ >> + 112, /* mode 3, 1080p */ >> + 112 /* mode 5, 720p */ >> +}; >> + >> +/* >> + * struct imx274_ctrls - imx274 ctrl structure >> + * @handler: V4L2 ctrl handler structure >> + * @exposure: Pointer to expsure ctrl structure >> + * @gain: Pointer to gain ctrl structure >> + * @vflip: Pointer to vflip ctrl structure >> + * @test_pattern: Pointer to test pattern ctrl structure >> + */ >> +struct imx274_ctrls { >> + struct v4l2_ctrl_handler handler; >> + struct v4l2_ctrl *exposure; >> + struct v4l2_ctrl *gain; >> + struct v4l2_ctrl *vflip; >> + struct v4l2_ctrl *test_pattern; >> +}; >> + >> +/* >> + * struct stim274 - imx274 device structure >> + * @sd: V4L2 subdevice structure >> + * @pd: Media pad structure >> + * @client: Pointer to I2C client >> + * @ctrls: imx274 control structure >> + * @format: V4L2 media bus frame format structure >> + * @frame_rate: V4L2 frame rate structure >> + * @regmap: Pointer to regmap structure >> + * @reset_gpio: Pointer to reset gpio >> + * @lock: Mutex structure >> + * @mode_index: Resolution mode index >> + */ >> +struct stimx274 { >> + struct v4l2_subdev sd; >> + struct media_pad pad; >> + struct i2c_client *client; >> + struct imx274_ctrls ctrls; >> + struct v4l2_mbus_framefmt format; >> + struct v4l2_fract frame_interval; >> + struct regmap *regmap; >> + struct gpio_desc *reset_gpio; >> + struct mutex lock; /* mutex lock for operations */ >> + u32 mode_index; >> +}; >> + >> +/* >> + * Function declaration >> + */ >> +static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl); >> +static int imx274_set_exposure(struct stimx274 *priv, int val); >> +static int imx274_set_vflip(struct stimx274 *priv, int val); >> +static int imx274_set_test_pattern(struct stimx274 *priv, int val); >> +static int imx274_set_frame_interval(struct stimx274 *priv, >> + struct v4l2_fract frame_interval); >> + >> +static inline void msleep_range(unsigned int delay_base) >> +{ >> + usleep_range(delay_base * 1000, delay_base * 1000 + 500); >> +} >> + >> +/* >> + * v4l2_ctrl and v4l2_subdev related operations >> + */ >> +static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) >> +{ >> + return &container_of(ctrl->handler, >> + struct stimx274, ctrls.handler)->sd; >> +} >> + >> +static inline struct stimx274 *to_imx274(struct v4l2_subdev *sd) >> +{ >> + return container_of(sd, struct stimx274, sd); >> +} >> + >> +/* >> + * imx274_regmap_util_write_table_8 - Function for writing register table >> + * @regmap: Pointer to device reg map structure >> + * @table: Table containing register values >> + * @wait_ms_addr: Flag for performing delay >> + * @end_addr: Flag for incating end of table >> + * >> + * This is used to write register table into sensor's reg map. >> + * >> + * Return: 0 on success, errors otherwise >> + */ >> +static int imx274_regmap_util_write_table_8(struct regmap *regmap, >> + const struct reg_8 table[], >> + u16 wait_ms_addr, u16 end_addr) >> +{ >> + int err; >> + const struct reg_8 *next; >> + u8 val; >> + >> + int range_start = -1; >> + int range_count = 0; >> + u8 range_vals[16]; >> + int max_range_vals = ARRAY_SIZE(range_vals); >> + >> + for (next = table;; next++) { >> + if ((next->addr != range_start + range_count) || >> + (next->addr == end_addr) || >> + (next->addr == wait_ms_addr) || >> + (range_count == max_range_vals)) { >> + if (range_count == 1) >> + err = regmap_write(regmap, >> + range_start, range_vals[0]); >> + else if (range_count > 1) >> + err = regmap_bulk_write(regmap, range_start, >> + &range_vals[0], >> + range_count); >> + >> + if (err) >> + return err; >> + >> + range_start = -1; >> + range_count = 0; >> + >> + /* Handle special address values */ >> + if (next->addr == end_addr) >> + break; >> + >> + if (next->addr == wait_ms_addr) { >> + msleep_range(next->val); >> + continue; >> + } >> + } >> + >> + val = next->val; >> + >> + if (range_start == -1) >> + range_start = next->addr; >> + >> + range_vals[range_count++] = val; >> + } >> + return 0; >> +} >> + >> +static inline int imx274_read_reg(struct stimx274 *priv, u16 addr, u8 *val) >> +{ >> + int err; >> + >> + err = regmap_read(priv->regmap, addr, (unsigned int *)val); >> + if (err) >> + dev_err(&priv->client->dev, >> + "%s : i2c read failed, addr = %x\n", __func__, addr); >> + else >> + dev_dbg(&priv->client->dev, >> + "%s : addr 0x%x, val=0x%x\n", __func__, >> + addr, *val); >> + return err; >> +} >> + >> +static inline int imx274_write_reg(struct stimx274 *priv, u16 addr, u8 val) >> +{ >> + int err; >> + >> + err = regmap_write(priv->regmap, addr, val); >> + if (err) >> + dev_err(&priv->client->dev, >> + "%s : i2c write failed, %x = %x\n", __func__, >> + addr, val); >> + else >> + dev_dbg(&priv->client->dev, >> + "%s : addr 0x%x, val=0x%x\n", __func__, >> + addr, val); >> + return err; >> +} >> + >> +static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[]) >> +{ >> + return imx274_regmap_util_write_table_8(priv->regmap, >> + table, IMX274_TABLE_WAIT_MS, IMX274_TABLE_END); >> +} >> + >> +/* >> + * imx274_mode_regs - Function for set mode registers per mode index >> + * @priv: Pointer to device structure >> + * @mode: Mode index value >> + * >> + * This is used to start steam per mode index. >> + * mode = 0, start stream for sensor Mode 1: 4K/raw10 >> + * mode = 1, start stream for sensor Mode 3: 1080p/raw10 >> + * mode = 2, start stream for sensor Mode 5: 720p/raw10 >> + * >> + * Return: 0 on success, errors otherwise >> + */ >> +static int imx274_mode_regs(struct stimx274 *priv, int mode) >> +{ >> + int err = 0; >> + >> + err = imx274_write_table(priv, >> mode_table[IMX274_MODE_START_STREAM_1]); >> + if (err) >> + return err; >> + >> + err = imx274_write_table(priv, >> mode_table[IMX274_MODE_START_STREAM_2]); >> + if (err) >> + return err; >> + >> + err = imx274_write_table(priv, mode_table[mode]); >> + >> + return err; >> +} >> + >> +/* >> + * imx274_start_stream - Function for starting stream per mode index >> + * @priv: Pointer to device structure >> + * >> + * Return: 0 on success, errors otherwise >> + */ >> +static int imx274_start_stream(struct stimx274 *priv) >> +{ >> + int err = 0; >> + >> + /* >> + * Refer to "Standby Cancel Sequence when using CSI-2" in >> + * imx274 datasheet, it should wait 10ms or more here. >> + * give it 1 extra ms for margin >> + */ >> + msleep_range(11); >> + err = imx274_write_table(priv, >> mode_table[IMX274_MODE_START_STREAM_3]); >> + if (err) >> + return err; >> + >> + /* >> + * Refer to "Standby Cancel Sequence when using CSI-2" in >> + * imx274 datasheet, it should wait 7ms or more here. >> + * give it 1 extra ms for margin >> + */ >> + msleep_range(8); >> + err = imx274_write_table(priv, >> mode_table[IMX274_MODE_START_STREAM_4]); >> + if (err) >> + return err; >> + >> + return 0; >> +} >> + >> +/* >> + * imx274_reset - Function called to reset the sensor >> + * @priv: Pointer to device structure >> + * @rst: Input value for determining the sensor's end state after reset >> + * >> + * Set the senor in reset and then >> + * if rst = 0, keep it in reset; >> + * if rst = 1, bring it out of reset. >> + * >> + */ >> +static void imx274_reset(struct stimx274 *priv, int rst) >> +{ >> + gpiod_set_value_cansleep(priv->reset_gpio, 0); >> + usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); >> + gpiod_set_value_cansleep(priv->reset_gpio, !!rst); >> + usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); >> +} >> + >> +/** >> + * imx274_s_ctrl - This is used to set the imx274 V4L2 controls >> + * @ctrl: V4L2 control to be set >> + * >> + * This function is used to set the V4L2 controls for the imx274 sensor. >> + * >> + * Return: 0 on success, errors otherwise >> + */ >> +static int imx274_s_ctrl(struct v4l2_ctrl *ctrl) >> +{ >> + struct v4l2_subdev *sd = ctrl_to_sd(ctrl); >> + struct stimx274 *imx274 = to_imx274(sd); >> + int ret = -EINVAL; >> + >> + dev_dbg(&imx274->client->dev, >> + "%s : s_ctrl: %s, value: %d\n", __func__, >> + ctrl->name, ctrl->val); >> + >> + switch (ctrl->id) { >> + case V4L2_CID_EXPOSURE: >> + dev_dbg(&imx274->client->dev, >> + "%s : set V4L2_CID_EXPOSURE\n", __func__); >> + ret = imx274_set_exposure(imx274, ctrl->val); >> + break; >> + >> + case V4L2_CID_GAIN: >> + dev_dbg(&imx274->client->dev, >> + "%s : set V4L2_CID_GAIN\n", __func__); >> + ret = imx274_set_gain(imx274, ctrl); >> + break; >> + >> + case V4L2_CID_VFLIP: >> + dev_dbg(&imx274->client->dev, >> + "%s : set V4L2_CID_VFLIP\n", __func__); >> + ret = imx274_set_vflip(imx274, ctrl->val); >> + break; >> + >> + case V4L2_CID_TEST_PATTERN: >> + dev_dbg(&imx274->client->dev, >> + "%s : set V4L2_CID_TEST_PATTERN\n", __func__); >> + ret = imx274_set_test_pattern(imx274, ctrl->val); >> + break; >> + } >> + >> + return ret; >> +} >> + >> +/** >> + * imx274_get_fmt - Get the pad format >> + * @sd: Pointer to V4L2 Sub device structure >> + * @cfg: Pointer to sub device pad information structure >> + * @fmt: Pointer to pad level media bus format >> + * >> + * This function is used to get the pad format information. >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_get_fmt(struct v4l2_subdev *sd, >> + struct v4l2_subdev_pad_config *cfg, >> + struct v4l2_subdev_format *fmt) >> +{ >> + struct stimx274 *imx274 = to_imx274(sd); >> + >> + mutex_lock(&imx274->lock); >> + fmt->format = imx274->format; >> + mutex_unlock(&imx274->lock); >> + return 0; >> +} >> + >> +/** >> + * imx274_set_fmt - This is used to set the pad format >> + * @sd: Pointer to V4L2 Sub device structure >> + * @cfg: Pointer to sub device pad information structure >> + * @format: Pointer to pad level media bus format >> + * >> + * This function is used to set the pad format. >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_set_fmt(struct v4l2_subdev *sd, >> + struct v4l2_subdev_pad_config *cfg, >> + struct v4l2_subdev_format *format) >> +{ >> + struct v4l2_mbus_framefmt *fmt = &format->format; >> + struct stimx274 *imx274 = to_imx274(sd); >> + struct i2c_client *client = imx274->client; >> + int index; >> + >> + dev_dbg(&client->dev, >> + "%s: width = %d height = %d code = %d mbus_code = %d\n", >> + __func__, fmt->width, fmt->height, fmt->code, >> + imx274_formats[imx274->mode_index].mbus_code); >> + >> + mutex_lock(&imx274->lock); >> + >> + for (index = 0; index < ARRAY_SIZE(imx274_formats); index++) { >> + if (imx274_formats[index].size.width == fmt->width && >> + imx274_formats[index].size.height == fmt->height) >> + break; >> + } >> + >> + if (index >= ARRAY_SIZE(imx274_formats)) { >> + /* default to first format */ >> + index = 0; >> + } >> + >> + imx274->mode_index = index; >> + >> + if (fmt->width > IMX274_MAX_WIDTH) >> + fmt->width = IMX274_MAX_WIDTH; >> + if (fmt->height > IMX274_MAX_HEIGHT) >> + fmt->height = IMX274_MAX_HEIGHT; >> + fmt->width = fmt->width & (~IMX274_MASK_LSB_2_BITS); >> + fmt->height = fmt->height & (~IMX274_MASK_LSB_2_BITS); >> + fmt->field = V4L2_FIELD_NONE; >> + >> + if (format->which == V4L2_SUBDEV_FORMAT_TRY) >> + cfg->try_fmt = *fmt; >> + else >> + imx274->format = *fmt; >> + >> + mutex_unlock(&imx274->lock); >> + return 0; >> +} >> + >> +/** >> + * imx274_g_frame_interval - Get the frame interval >> + * @sd: Pointer to V4L2 Sub device structure >> + * @fi: Pointer to V4l2 Sub device frame interval structure >> + * >> + * This function is used to get the frame interval. >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_g_frame_interval(struct v4l2_subdev *sd, >> + struct v4l2_subdev_frame_interval *fi) >> +{ >> + struct stimx274 *imx274 = to_imx274(sd); >> + >> + fi->interval = imx274->frame_interval; >> + dev_dbg(&imx274->client->dev, "%s frame rate = %d / %d\n", >> + __func__, imx274->frame_interval.numerator, >> + imx274->frame_interval.denominator); >> + >> + return 0; >> +} >> + >> +/** >> + * imx274_s_frame_interval - Set the frame interval >> + * @sd: Pointer to V4L2 Sub device structure >> + * @fi: Pointer to V4l2 Sub device frame interval structure >> + * >> + * This function is used to set the frame intervavl. >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_s_frame_interval(struct v4l2_subdev *sd, >> + struct v4l2_subdev_frame_interval *fi) >> +{ >> + struct stimx274 *imx274 = to_imx274(sd); >> + struct v4l2_ctrl *ctrl = imx274->ctrls.exposure; >> + int min, max, def; >> + int ret; >> + >> + mutex_lock(&imx274->lock); >> + ret = imx274_set_frame_interval(imx274, fi->interval); >> + >> + if (!ret) { >> + /* >> + * exposure time range is decided by frame interval >> + * need to update it after frame interal changes >> + */ >> + min = IMX274_MIN_EXPOSURE_TIME; >> + max = fi->interval.numerator * 1000000 >> + / fi->interval.denominator; >> + def = max; >> + if (__v4l2_ctrl_modify_range(ctrl, min, max, 1, def)) { >> + dev_err(&imx274->client->dev, >> + "Exposure ctrl range update failed\n"); >> + goto unlock; >> + } >> + >> + /* update exposure time accordingly */ >> + imx274_set_exposure(imx274, imx274->ctrls.exposure->val); >> + >> + dev_dbg(&imx274->client->dev, "set frame interval to %uus\n", >> + fi->interval.numerator * 1000000 >> + / fi->interval.denominator); >> + } >> + >> +unlock: >> + mutex_unlock(&imx274->lock); >> + >> + return ret; >> +} >> + >> +/** >> + * imx274_load_default - load default control values >> + * @priv: Pointer to device structure >> + * >> + * Return: 0 on success, errors otherwise >> + */ >> +static int imx274_load_default(struct stimx274 *priv) >> +{ >> + int ret; >> + >> + /* load default control values */ >> + priv->frame_interval.numerator = 1; >> + priv->frame_interval.denominator = IMX274_DEF_FRAME_RATE; >> + priv->ctrls.exposure->val = 1000000 / IMX274_DEF_FRAME_RATE; >> + priv->ctrls.gain->val = IMX274_DEF_GAIN; >> + priv->ctrls.vflip->val = 0; >> + priv->ctrls.test_pattern->val = TEST_PATTERN_DISABLED; >> + >> + /* update frame rate */ >> + ret = imx274_set_frame_interval(priv, >> + priv->frame_interval); >> + if (ret) >> + return ret; >> + >> + /* update exposure time */ >> + ret = v4l2_ctrl_s_ctrl(priv->ctrls.exposure, priv->ctrls.exposure->val); >> + if (ret) >> + return ret; >> + >> + /* update gain */ >> + ret = v4l2_ctrl_s_ctrl(priv->ctrls.gain, priv->ctrls.gain->val); >> + if (ret) >> + return ret; >> + >> + /* update vflip */ >> + ret = v4l2_ctrl_s_ctrl(priv->ctrls.vflip, priv->ctrls.vflip->val); >> + if (ret) >> + return ret; >> + >> + return 0; >> +} >> + >> +/** >> + * imx274_s_stream - It is used to start/stop the streaming. >> + * @sd: V4L2 Sub device >> + * @on: Flag (True / False) >> + * >> + * This function controls the start or stop of streaming for the >> + * imx274 sensor. >> + * >> + * Return: 0 on success, errors otherwise >> + */ >> +static int imx274_s_stream(struct v4l2_subdev *sd, int on) >> +{ >> + struct stimx274 *imx274 = to_imx274(sd); >> + int ret = 0; >> + >> + dev_dbg(&imx274->client->dev, "%s : %s, mode index = %d\n", >> __func__, >> + on ? "Stream Start" : "Stream Stop", imx274->mode_index); >> + >> + mutex_lock(&imx274->lock); >> + >> + if (on) { >> + /* load mode registers */ >> + imx274_mode_regs(imx274, imx274->mode_index); >> + if (ret) >> + goto fail; >> + >> + /* >> + * update frame rate & expsoure. if the last mode is different, >> + * HMAX could be changed. As the result, frame rate & exposure >> + * are changed. >> + * gain is not affected. >> + */ >> + ret = imx274_set_frame_interval(imx274, >> + imx274->frame_interval); >> + if (ret) >> + goto fail; >> + >> + /* update exposure time */ >> + ret = __v4l2_ctrl_s_ctrl(imx274->ctrls.exposure, >> + imx274->ctrls.exposure->val); >> + if (ret) >> + goto fail; >> + >> + /* start stream */ >> + ret = imx274_start_stream(imx274); >> + if (ret) >> + goto fail; >> + } else { >> + /* stop stream */ >> + ret = imx274_write_table(imx274, >> + >> mode_table[IMX274_MODE_STOP_STREAM]); >> + if (ret) >> + goto fail; >> + } >> + >> + mutex_unlock(&imx274->lock); >> + dev_dbg(&imx274->client->dev, >> + "%s : Done: mode = %d\n", __func__, imx274->mode_index); >> + return 0; >> + >> +fail: >> + mutex_unlock(&imx274->lock); >> + dev_err(&imx274->client->dev, "s_stream failed\n"); >> + return ret; >> +} >> + >> +/* >> + * imx274_get_frame_length - Function for obtaining current frame length >> + * @priv: Pointer to device structure >> + * @val: Pointer to obainted value >> + * >> + * frame_length = vmax x (svr + 1), in unit of hmax. >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_get_frame_length(struct stimx274 *priv, u32 *val) >> +{ >> + int err; >> + u16 svr; >> + u32 vmax; >> + u8 reg_val[3]; >> + >> + /* svr */ >> + err = imx274_read_reg(priv, IMX274_SVR_REG_LSB, ®_val[0]); >> + if (err) >> + goto fail; >> + >> + err = imx274_read_reg(priv, IMX274_SVR_REG_MSB, ®_val[1]); >> + if (err) >> + goto fail; >> + >> + svr = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0]; >> + >> + /* vmax */ >> + err = imx274_read_reg(priv, IMX274_FRAME_LENGTH_ADDR_3, >> ®_val[0]); >> + if (err) >> + goto fail; >> + >> + err = imx274_read_reg(priv, IMX274_FRAME_LENGTH_ADDR_2, >> ®_val[1]); >> + if (err) >> + goto fail; >> + >> + err = imx274_read_reg(priv, IMX274_FRAME_LENGTH_ADDR_1, >> ®_val[2]); >> + if (err) >> + goto fail; >> + >> + vmax = ((reg_val[2] & IMX274_MASK_LSB_3_BITS) << >> IMX274_SHIFT_16_BITS) >> + + (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0]; >> + >> + *val = vmax * (svr + 1); >> + >> + return 0; >> + >> +fail: >> + dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); >> + return err; >> +} >> + >> +static int imx274_clamp_coarse_time(struct stimx274 *priv, u32 *val, >> + u32 *frame_length) >> +{ >> + int err; >> + >> + err = imx274_get_frame_length(priv, frame_length); >> + if (err) >> + return err; >> + >> + if (*frame_length < min_frame_len[priv->mode_index]) >> + *frame_length = min_frame_len[priv->mode_index]; >> + >> + *val = *frame_length - *val; /* convert to raw shr */ >> + if (*val > *frame_length - IMX274_SHR_LIMIT_CONST) >> + *val = *frame_length - IMX274_SHR_LIMIT_CONST; >> + else if (*val < min_SHR[priv->mode_index]) >> + *val = min_SHR[priv->mode_index]; >> + >> + return 0; >> +} >> + >> +/* >> + * imx274_set_digital gain - Function called when setting digital gain >> + * @priv: Pointer to device structure >> + * @dgain: Value of digital gain. >> + * >> + * Digital gain has only 4 steps: 1x, 2x, 4x, and 8x >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_set_digital_gain(struct stimx274 *priv, u32 dgain) >> +{ >> + u8 reg_val; >> + >> + reg_val = ffs(dgain); >> + >> + if (reg_val) >> + reg_val--; >> + >> + reg_val = clamp(reg_val, (u8)0, (u8)3); >> + >> + return imx274_write_reg(priv, IMX274_DIGITAL_GAIN_REG, >> + reg_val & IMX274_MASK_LSB_4_BITS); >> +} >> + >> +static inline void imx274_calculate_gain_regs(struct reg_8 regs[2], u16 gain) >> +{ >> + regs->addr = IMX274_ANALOG_GAIN_ADDR_MSB; >> + regs->val = (gain >> IMX274_SHIFT_8_BITS) & >> IMX274_MASK_LSB_3_BITS; >> + >> + (regs + 1)->addr = IMX274_ANALOG_GAIN_ADDR_LSB; >> + (regs + 1)->val = (gain) & IMX274_MASK_LSB_8_BITS; >> +} >> + >> +/* >> + * imx274_set_gain - Function called when setting gain >> + * @priv: Pointer to device structure >> + * @val: Value of gain. the real value = val << IMX274_GAIN_SHIFT; >> + * @ctrl: v4l2 control pointer >> + * >> + * Set the gain based on input value. >> + * The caller should hold the mutex lock imx274->lock if necessary >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl) >> +{ >> + struct reg_8 reg_list[2]; >> + int err; >> + u32 gain, analog_gain, digital_gain, gain_reg; >> + int i; >> + >> + gain = (u32)(ctrl->val); >> + >> + dev_dbg(&priv->client->dev, >> + "%s : input gain = %d.%d\n", __func__, >> + gain >> IMX274_GAIN_SHIFT, >> + ((gain & IMX274_GAIN_SHIFT_MASK) * 100) >> >> IMX274_GAIN_SHIFT); >> + >> + if (gain > IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN) >> + gain = IMX274_MAX_DIGITAL_GAIN * >> IMX274_MAX_ANALOG_GAIN; >> + else if (gain < IMX274_MIN_GAIN) >> + gain = IMX274_MIN_GAIN; >> + >> + if (gain <= IMX274_MAX_ANALOG_GAIN) >> + digital_gain = 1; >> + else if (gain <= IMX274_MAX_ANALOG_GAIN * 2) >> + digital_gain = 2; >> + else if (gain <= IMX274_MAX_ANALOG_GAIN * 4) >> + digital_gain = 4; >> + else >> + digital_gain = IMX274_MAX_DIGITAL_GAIN; >> + >> + analog_gain = gain / digital_gain; >> + >> + dev_dbg(&priv->client->dev, >> + "%s : digital gain = %d, analog gain = %d.%d\n", >> + __func__, digital_gain, analog_gain >> IMX274_GAIN_SHIFT, >> + ((analog_gain & IMX274_GAIN_SHIFT_MASK) * 100) >> + >> IMX274_GAIN_SHIFT); >> + >> + err = imx274_set_digital_gain(priv, digital_gain); >> + if (err) >> + goto fail; >> + >> + /* convert to register value, refer to imx274 datasheet */ >> + gain_reg = (u32)IMX274_GAIN_CONST - >> + (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / analog_gain; >> + if (gain_reg > IMX274_GAIN_REG_MAX) >> + gain_reg = IMX274_GAIN_REG_MAX; >> + >> + imx274_calculate_gain_regs(reg_list, (u16)gain_reg); >> + >> + for (i = 0; i < ARRAY_SIZE(reg_list); i++) { >> + err = imx274_write_reg(priv, reg_list[i].addr, >> + reg_list[i].val); >> + if (err) >> + goto fail; >> + } >> + >> + if (IMX274_GAIN_CONST - gain_reg == 0) { >> + err = -EINVAL; >> + goto fail; >> + } >> + >> + /* convert register value back to gain value */ >> + ctrl->val = (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) >> + / (IMX274_GAIN_CONST - gain_reg) * digital_gain; >> + >> + dev_dbg(&priv->client->dev, >> + "%s : GAIN control success, gain_reg = %d, new gain = %d\n", >> + __func__, gain_reg, ctrl->val); >> + >> + return 0; >> + >> +fail: >> + dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); >> + return err; >> +} >> + >> +static inline void imx274_calculate_coarse_time_regs(struct reg_8 regs[2], >> + u32 coarse_time) >> +{ >> + regs->addr = IMX274_COARSE_TIME_ADDR_MSB; >> + regs->val = (coarse_time >> IMX274_SHIFT_8_BITS) >> + & IMX274_MASK_LSB_8_BITS; >> + (regs + 1)->addr = IMX274_COARSE_TIME_ADDR_LSB; >> + (regs + 1)->val = (coarse_time) & IMX274_MASK_LSB_8_BITS; >> +} >> + >> +/* >> + * imx274_set_coarse_time - Function called when setting SHR value >> + * @priv: Pointer to device structure >> + * @val: Value for exposure time in number of line_length, or [HMAX] >> + * >> + * Set SHR value based on input value. >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_set_coarse_time(struct stimx274 *priv, u32 *val) >> +{ >> + struct reg_8 reg_list[2]; >> + int err; >> + u32 coarse_time, frame_length; >> + int i; >> + >> + coarse_time = *val; >> + >> + /* convert exposure_time to appropriate SHR value */ >> + err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length); >> + if (err) >> + goto fail; >> + >> + /* prepare SHR registers */ >> + imx274_calculate_coarse_time_regs(reg_list, coarse_time); >> + >> + /* write to SHR registers */ >> + for (i = 0; i < ARRAY_SIZE(reg_list); i++) { >> + err = imx274_write_reg(priv, reg_list[i].addr, >> + reg_list[i].val); >> + if (err) >> + goto fail; >> + } >> + >> + *val = frame_length - coarse_time; >> + return 0; >> + >> +fail: >> + dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); >> + return err; >> +} >> + >> +/* >> + * imx274_set_exposure - Function called when setting exposure time >> + * @priv: Pointer to device structure >> + * @val: Variable for exposure time, in the unit of micro-second >> + * >> + * Set exposure time based on input value. >> + * The caller should hold the mutex lock imx274->lock if necessary >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_set_exposure(struct stimx274 *priv, int val) >> +{ >> + int err; >> + u16 hmax; >> + u8 reg_val[2]; >> + u32 coarse_time; /* exposure time in unit of line (HMAX)*/ >> + >> + dev_dbg(&priv->client->dev, >> + "%s : EXPOSURE control input = %d\n", __func__, val); >> + >> + /* step 1: convert input exposure_time (val) into number of 1[HMAX] */ >> + >> + /* obtain HMAX value */ >> + err = imx274_read_reg(priv, IMX274_HMAX_REG_LSB, ®_val[0]); >> + if (err) >> + goto fail; >> + err = imx274_read_reg(priv, IMX274_HMAX_REG_MSB, ®_val[1]); >> + if (err) >> + goto fail; >> + hmax = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0]; >> + if (hmax == 0) { >> + err = -EINVAL; >> + goto fail; >> + } >> + >> + coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * >> val >> + - nocpiop[priv->mode_index]) / hmax; >> + >> + /* step 2: convert exposure_time into SHR value */ >> + >> + /* set SHR */ >> + err = imx274_set_coarse_time(priv, &coarse_time); >> + if (err) >> + goto fail; >> + >> + priv->ctrls.exposure->val = >> + (coarse_time * hmax + nocpiop[priv->mode_index]) >> + / (IMX274_PIXCLK_CONST1 / >> IMX274_PIXCLK_CONST2); >> + >> + dev_dbg(&priv->client->dev, >> + "%s : EXPOSURE control success\n", __func__); >> + return 0; >> + >> +fail: >> + dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); >> + >> + return err; >> +} >> + >> +/* >> + * imx274_set_vflip - Function called when setting vertical flip >> + * @priv: Pointer to device structure >> + * @val: Value for vflip setting >> + * >> + * Set vertical flip based on input value. >> + * val = 0: normal, no vertical flip >> + * val = 1: vertical flip enabled >> + * The caller should hold the mutex lock imx274->lock if necessary >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_set_vflip(struct stimx274 *priv, int val) >> +{ >> + int err; >> + >> + err = imx274_write_reg(priv, IMX274_VFLIP_REG, val); >> + if (err) { >> + dev_err(&priv->client->dev, "VFILP control error\n"); >> + return err; >> + } >> + >> + dev_dbg(&priv->client->dev, >> + "%s : VFLIP control success\n", __func__); >> + >> + return 0; >> +} >> + >> +/* >> + * imx274_set_test_pattern - Function called when setting test pattern >> + * @priv: Pointer to device structure >> + * @val: Variable for test pattern >> + * >> + * Set to different test patterns based on input value. >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_set_test_pattern(struct stimx274 *priv, int val) >> +{ >> + int err = 0; >> + >> + if (val == TEST_PATTERN_DISABLED) { >> + err = imx274_write_table(priv, imx274_tp_disabled); >> + } else if (val <= TEST_PATTERN_V_COLOR_BARS) { >> + err = imx274_write_reg(priv, IMX274_TEST_PATTERN_REG, val - >> 1); >> + if (!err) >> + err = imx274_write_table(priv, imx274_tp_regs); >> + } else { >> + err = -EINVAL; >> + } >> + >> + if (!err) >> + dev_dbg(&priv->client->dev, >> + "%s : TEST PATTERN control success\n", __func__); >> + else >> + dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); >> + >> + return err; >> +} >> + >> +static inline void imx274_calculate_frame_length_regs(struct reg_8 regs[3], >> + u32 frame_length) >> +{ >> + regs->addr = IMX274_FRAME_LENGTH_ADDR_1; >> + regs->val = (frame_length >> IMX274_SHIFT_16_BITS) >> + & IMX274_MASK_LSB_4_BITS; >> + (regs + 1)->addr = IMX274_FRAME_LENGTH_ADDR_2; >> + (regs + 1)->val = (frame_length >> IMX274_SHIFT_8_BITS) >> + & IMX274_MASK_LSB_8_BITS; >> + (regs + 2)->addr = IMX274_FRAME_LENGTH_ADDR_3; >> + (regs + 2)->val = (frame_length) & IMX274_MASK_LSB_8_BITS; >> +} >> + >> +/* >> + * imx274_set_frame_length - Function called when setting frame length >> + * @priv: Pointer to device structure >> + * @val: Variable for frame length (= VMAX, i.e. vertical drive period length) >> + * >> + * Set frame length based on input value. >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_set_frame_length(struct stimx274 *priv, u32 val) >> +{ >> + struct reg_8 reg_list[3]; >> + int err; >> + u32 frame_length; >> + int i; >> + >> + dev_dbg(&priv->client->dev, "%s : input length = %d\n", >> + __func__, val); >> + >> + frame_length = (u32)val; >> + >> + imx274_calculate_frame_length_regs(reg_list, frame_length); >> + for (i = 0; i < ARRAY_SIZE(reg_list); i++) { >> + err = imx274_write_reg(priv, reg_list[i].addr, >> + reg_list[i].val); >> + if (err) >> + goto fail; >> + } >> + >> + return 0; >> + >> +fail: >> + dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); >> + return err; >> +} >> + >> +/* >> + * imx274_set_frame_interval - Function called when setting frame interval >> + * @priv: Pointer to device structure >> + * @frame_interval: Variable for frame interval >> + * >> + * Change frame interval by updating VMAX value >> + * The caller should hold the mutex lock imx274->lock if necessary >> + * >> + * Return: 0 on success >> + */ >> +static int imx274_set_frame_interval(struct stimx274 *priv, >> + struct v4l2_fract frame_interval) >> +{ >> + int err; >> + u32 frame_length, req_frame_rate; >> + u16 svr; >> + u16 hmax; >> + u8 reg_val[2]; >> + >> + dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d", >> + __func__, frame_interval.numerator, >> + frame_interval.denominator); >> + >> + if (frame_interval.numerator == 0) { >> + err = -EINVAL; >> + goto fail; >> + } >> + >> + req_frame_rate = (u32)(frame_interval.denominator >> + / frame_interval.numerator); >> + >> + /* boundary check */ >> + if (req_frame_rate > max_frame_rate[priv->mode_index]) { >> + frame_interval.numerator = 1; >> + frame_interval.denominator = >> + max_frame_rate[priv->mode_index]; >> + } else if (req_frame_rate < IMX274_MIN_FRAME_RATE) { >> + frame_interval.numerator = 1; >> + frame_interval.denominator = IMX274_MIN_FRAME_RATE; >> + } >> + >> + /* >> + * VMAX = 1/frame_rate x 72M / (SVR+1) / HMAX >> + * frame_length (i.e. VMAX) = (frame_interval) x 72M /(SVR+1) / HMAX >> + */ >> + >> + /* SVR */ >> + err = imx274_read_reg(priv, IMX274_SVR_REG_LSB, ®_val[0]); >> + if (err) >> + goto fail; >> + err = imx274_read_reg(priv, IMX274_SVR_REG_MSB, ®_val[1]); >> + if (err) >> + goto fail; >> + svr = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0]; >> + dev_dbg(&priv->client->dev, >> + "%s : register SVR = %d\n", __func__, svr); >> + >> + /* HMAX */ >> + err = imx274_read_reg(priv, IMX274_HMAX_REG_LSB, ®_val[0]); >> + if (err) >> + goto fail; >> + err = imx274_read_reg(priv, IMX274_HMAX_REG_MSB, ®_val[1]); >> + if (err) >> + goto fail; >> + hmax = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0]; >> + dev_dbg(&priv->client->dev, >> + "%s : register HMAX = %d\n", __func__, hmax); >> + >> + if (hmax == 0 || frame_interval.denominator == 0) { >> + err = -EINVAL; >> + goto fail; >> + } >> + >> + frame_length = IMX274_PIXCLK_CONST1 / (svr + 1) / hmax >> + * frame_interval.numerator >> + / frame_interval.denominator; >> + >> + err = imx274_set_frame_length(priv, frame_length); >> + if (err) >> + goto fail; >> + >> + priv->frame_interval = frame_interval; >> + return 0; >> + >> +fail: >> + dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); >> + return err; >> +} >> + >> +static const struct v4l2_subdev_pad_ops imx274_pad_ops = { >> + .get_fmt = imx274_get_fmt, >> + .set_fmt = imx274_set_fmt, >> +}; >> + >> +static const struct v4l2_subdev_video_ops imx274_video_ops = { >> + .g_frame_interval = imx274_g_frame_interval, >> + .s_frame_interval = imx274_s_frame_interval, >> + .s_stream = imx274_s_stream, >> +}; >> + >> +static const struct v4l2_subdev_ops imx274_subdev_ops = { >> + .pad = &imx274_pad_ops, >> + .video = &imx274_video_ops, >> +}; >> + >> +static const struct v4l2_ctrl_ops imx274_ctrl_ops = { >> + .s_ctrl = imx274_s_ctrl, >> +}; >> + >> +static const struct of_device_id imx274_of_id_table[] = { >> + { .compatible = "sony,imx274" }, >> + { } >> +}; >> +MODULE_DEVICE_TABLE(of, imx274_of_id_table); >> + >> +static const struct i2c_device_id imx274_id[] = { >> + { "IMX274", 0 }, >> + { } >> +}; >> +MODULE_DEVICE_TABLE(i2c, imx274_id); >> + >> +static int imx274_probe(struct i2c_client *client, >> + const struct i2c_device_id *id) >> +{ >> + struct v4l2_subdev *sd; >> + struct stimx274 *imx274; >> + int ret; >> + >> + /* initialize imx274 */ >> + imx274 = devm_kzalloc(&client->dev, sizeof(*imx274), GFP_KERNEL); >> + if (!imx274) >> + return -ENOMEM; >> + >> + mutex_init(&imx274->lock); >> + >> + /* initialize regmap */ >> + imx274->regmap = devm_regmap_init_i2c(client, >> &imx274_regmap_config); >> + if (IS_ERR(imx274->regmap)) { >> + dev_err(&client->dev, >> + "regmap init failed: %ld\n", PTR_ERR(imx274- >> >regmap)); >> + ret = -ENODEV; >> + goto err_regmap; >> + } >> + >> + /* initialize subdevice */ >> + imx274->client = client; >> + sd = &imx274->sd; >> + v4l2_i2c_subdev_init(sd, client, &imx274_subdev_ops); >> + strlcpy(sd->name, DRIVER_NAME, sizeof(sd->name)); >> + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | >> V4L2_SUBDEV_FL_HAS_EVENTS; >> + >> + /* initialize subdev media pad */ >> + imx274->pad.flags = MEDIA_PAD_FL_SOURCE; >> + sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; >> + ret = media_entity_pads_init(&sd->entity, 1, &imx274->pad); >> + if (ret < 0) { >> + dev_err(&client->dev, >> + "%s : media entity init Failed %d\n", __func__, ret); >> + goto err_regmap; >> + } >> + >> + /* initialize sensor reset gpio */ >> + imx274->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", >> + GPIOD_OUT_HIGH); >> + if (IS_ERR(imx274->reset_gpio)) { >> + if (PTR_ERR(imx274->reset_gpio) != -EPROBE_DEFER) >> + dev_err(&client->dev, "Reset GPIO not setup in DT"); >> + ret = PTR_ERR(imx274->reset_gpio); >> + goto err_me; >> + } >> + >> + /* pull sensor out of reset */ >> + imx274_reset(imx274, 1); >> + >> + /* initialize controls */ >> + ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 2); >> + if (ret < 0) { >> + dev_err(&client->dev, >> + "%s : ctrl handler init Failed\n", __func__); >> + goto err_me; >> + } >> + >> + imx274->ctrls.handler.lock = &imx274->lock; >> + >> + /* add new controls */ >> + imx274->ctrls.test_pattern = v4l2_ctrl_new_std_menu_items( >> + &imx274->ctrls.handler, &imx274_ctrl_ops, >> + V4L2_CID_TEST_PATTERN, >> + ARRAY_SIZE(tp_qmenu) - 1, 0, 0, tp_qmenu); >> + >> + imx274->ctrls.gain = v4l2_ctrl_new_std( >> + &imx274->ctrls.handler, >> + &imx274_ctrl_ops, >> + V4L2_CID_GAIN, IMX274_MIN_GAIN, >> + IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN, >> 1, >> + IMX274_DEF_GAIN); >> + >> + imx274->ctrls.exposure = v4l2_ctrl_new_std( >> + &imx274->ctrls.handler, >> + &imx274_ctrl_ops, >> + V4L2_CID_EXPOSURE, IMX274_MIN_EXPOSURE_TIME, >> + 1000000 / IMX274_DEF_FRAME_RATE, 1, >> + IMX274_MIN_EXPOSURE_TIME); >> + >> + imx274->ctrls.vflip = v4l2_ctrl_new_std( >> + &imx274->ctrls.handler, >> + &imx274_ctrl_ops, >> + V4L2_CID_VFLIP, 0, 1, 1, 0); >> + >> + imx274->sd.ctrl_handler = &imx274->ctrls.handler; >> + if (imx274->ctrls.handler.error) { >> + ret = imx274->ctrls.handler.error; >> + goto err_ctrls; >> + } >> + >> + /* setup default controls */ >> + ret = v4l2_ctrl_handler_setup(&imx274->ctrls.handler); >> + if (ret) { >> + dev_err(&client->dev, >> + "Error %d setup default controls\n", ret); >> + goto err_ctrls; >> + } >> + >> + /* initialize format */ >> + imx274->mode_index = IMX274_MODE_3840X2160; >> + imx274->format.width = imx274_formats[0].size.width; >> + imx274->format.height = imx274_formats[0].size.height; >> + imx274->format.field = V4L2_FIELD_NONE; >> + imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10; >> + imx274->format.colorspace = V4L2_COLORSPACE_SRGB; >> + imx274->frame_interval.numerator = 1; >> + imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE; >> + >> + /* load default control values */ >> + ret = imx274_load_default(imx274); >> + if (ret) { >> + dev_err(&client->dev, >> + "%s : imx274_load_default failed %d\n", >> + __func__, ret); >> + goto err_ctrls; >> + } >> + >> + /* register subdevice */ >> + ret = v4l2_async_register_subdev(sd); >> + if (ret < 0) { >> + dev_err(&client->dev, >> + "%s : v4l2_async_register_subdev failed %d\n", >> + __func__, ret); >> + goto err_ctrls; >> + } >> + >> + dev_info(&client->dev, "imx274 : imx274 probe success !\n"); >> + return 0; >> + >> +err_ctrls: >> + v4l2_ctrl_handler_free(&imx274->ctrls.handler); >> +err_me: >> + media_entity_cleanup(&sd->entity); >> +err_regmap: >> + mutex_destroy(&imx274->lock); >> + return ret; >> +} >> + >> +static int imx274_remove(struct i2c_client *client) >> +{ >> + struct v4l2_subdev *sd = i2c_get_clientdata(client); >> + struct stimx274 *imx274 = to_imx274(sd); >> + >> + /* stop stream */ >> + imx274_write_table(imx274, >> mode_table[IMX274_MODE_STOP_STREAM]); >> + >> + v4l2_async_unregister_subdev(sd); >> + v4l2_ctrl_handler_free(&imx274->ctrls.handler); >> + media_entity_cleanup(&sd->entity); >> + mutex_destroy(&imx274->lock); >> + return 0; >> +} >> + >> +static struct i2c_driver imx274_i2c_driver = { >> + .driver = { >> + .name = DRIVER_NAME, >> + .of_match_table = imx274_of_id_table, >> + }, >> + .probe = imx274_probe, >> + .remove = imx274_remove, >> + .id_table = imx274_id, >> +}; >> + >> +module_i2c_driver(imx274_i2c_driver); >> + >> +MODULE_AUTHOR("Leon Luo <leonl@xxxxxxxxxxxxxxxxxx>"); >> +MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver"); >> +MODULE_LICENSE("GPL v2"); >> -- >> 2.14.0.rc1 >
