| Message ID | 1547176516-18074-1-git-send-email-ben.kao@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] media: ov8856: Add support for OV8856 sensor | expand |
Hi Ben, Thanks for the update. A few trivial things below, and then I guess we're done. On Fri, Jan 11, 2019 at 11:15:16AM +0800, Ben Kao wrote: > This patch adds driver for Omnivision's ov8856 sensor, > the driver supports following features: > > - manual exposure/gain(analog and digital) control support > - two link frequencies > - VBLANK/HBLANK support > - test pattern support > - media controller support > - runtime PM support > - enable Vsync signal output > - supported resolutions > + 3280x2464 at 30FPS > + 1640x1232 at 30FPS > > Signed-off-by: Ben Kao <ben.kao@intel.com> > --- > since v2: > --Add MAINTAINERS entry for ov8856 driver. > --Modify the type of variables buf_i/var_i to "unsigned int" in > ov8856_write_reg(). > --Add link_validate function. > --Remove "ifdef CONFIG_ACPI" in ov8856_i2c_driver{}. > --Move ov8856_check_hwcfg() to the top of ov8856_probe(). > --Remove unnecessary blank lines. > --Remove unnecessary V4L2_SUBDEV_FL_HAS_EVENTS flag. > --Enable Vsync signal output. > --- > MAINTAINERS | 7 + > drivers/media/i2c/Kconfig | 12 + > drivers/media/i2c/Makefile | 1 + > drivers/media/i2c/ov8856.c | 1285 ++++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 1305 insertions(+) > create mode 100644 drivers/media/i2c/ov8856.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 0767f1d..74d4d50 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -11068,6 +11068,13 @@ S: Maintained > F: drivers/media/i2c/ov7740.c > F: Documentation/devicetree/bindings/media/i2c/ov7740.txt > > +OMNIVISION OV8856 SENSOR DRIVER > +M: Ben Kao <ben.kao@intel.com> > +L: linux-media@vger.kernel.org > +T: git git://linuxtv.org/media_tree.git > +S: Maintained > +F: drivers/media/i2c/ov8856.c > + > OMNIVISION OV9650 SENSOR DRIVER > M: Sakari Ailus <sakari.ailus@linux.intel.com> > R: Akinobu Mita <akinobu.mita@gmail.com> > diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig > index 704af21..4fdcb92 100644 > --- a/drivers/media/i2c/Kconfig > +++ b/drivers/media/i2c/Kconfig > @@ -806,6 +806,18 @@ config VIDEO_OV7740 > This is a Video4Linux2 sensor driver for the OmniVision > OV7740 VGA camera sensor. > > +config VIDEO_OV8856 > + tristate "OmniVision OV8856 sensor support" > + depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API > + depends on MEDIA_CAMERA_SUPPORT > + select V4L2_FWNODE > + help > + This is a Video4Linux2 sensor driver for the OmniVision > + OV8856 camera sensor. > + > + To compile this driver as a module, choose M here: the > + module will be called ov8856. > + > config VIDEO_OV9650 > tristate "OmniVision OV9650/OV9652 sensor support" > depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API > diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile > index 260d4d9..47accb0 100644 > --- a/drivers/media/i2c/Makefile > +++ b/drivers/media/i2c/Makefile > @@ -78,6 +78,7 @@ obj-$(CONFIG_VIDEO_OV7640) += ov7640.o > obj-$(CONFIG_VIDEO_OV7670) += ov7670.o > obj-$(CONFIG_VIDEO_OV772X) += ov772x.o > obj-$(CONFIG_VIDEO_OV7740) += ov7740.o > +obj-$(CONFIG_VIDEO_OV8856) += ov8856.o > obj-$(CONFIG_VIDEO_OV9650) += ov9650.o > obj-$(CONFIG_VIDEO_OV13858) += ov13858.o > obj-$(CONFIG_VIDEO_MT9M032) += mt9m032.o > diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c > new file mode 100644 > index 0000000..375f9bd > --- /dev/null > +++ b/drivers/media/i2c/ov8856.c > @@ -0,0 +1,1285 @@ > +// SPDX-License-Identifier: GPL-2.0 > +// Copyright (c) 2018 Intel Corporation. 2018--2019 > + > +#include <linux/acpi.h> > +#include <linux/delay.h> > +#include <linux/i2c.h> > +#include <linux/module.h> > +#include <linux/pm_runtime.h> > +#include <media/v4l2-ctrls.h> > +#include <media/v4l2-device.h> > +#include <media/v4l2-fwnode.h> > + > +#ifndef V4L2_CID_DIGITAL_GAIN > +#define V4L2_CID_DIGITAL_GAIN V4L2_CID_GAIN > +#endif You can drop the three lines (or actually four, including the empty one). > + > +#define OV8856_REG_VALUE_08BIT 1 > +#define OV8856_REG_VALUE_16BIT 2 > +#define OV8856_REG_VALUE_24BIT 3 > + > +#define OV8856_LINK_FREQ_360MHZ 360000000ULL > +#define OV8856_LINK_FREQ_180MHZ 180000000ULL > +#define OV8856_SCLK 144000000ULL > +#define OV8856_MCLK 19200000 > +#define OV8856_DATA_LANES 4 > +#define OV8856_RGB_DEPTH 10 > + > +#define OV8856_REG_CHIP_ID 0x300a > +#define OV8856_CHIP_ID 0x00885a > + > +#define OV8856_REG_MODE_SELECT 0x0100 > +#define OV8856_MODE_STANDBY 0x00 > +#define OV8856_MODE_STREAMING 0x01 > + > +/* vertical-timings from sensor */ > +#define OV8856_REG_VTS 0x380e > +#define OV8856_VTS_MAX 0x7fff > + > +/* horizontal-timings from sensor */ > +#define OV8856_REG_HTS 0x380c > + > +/* Exposure controls from sensor */ > +#define OV8856_REG_EXPOSURE 0x3500 > +#define OV8856_EXPOSURE_MIN 6 > +#define OV8856_EXPOSURE_MAX_MARGIN 6 > +#define OV8856_EXPOSURE_STEP 1 > + > +/* Analog gain controls from sensor */ > +#define OV8856_REG_ANALOG_GAIN 0x3508 > +#define OV8856_ANAL_GAIN_MIN 128 > +#define OV8856_ANAL_GAIN_MAX 2047 > +#define OV8856_ANAL_GAIN_STEP 1 > + > +/* Digital gain controls from sensor */ > +#define OV8856_REG_MWB_R_GAIN 0x5019 > +#define OV8856_REG_MWB_G_GAIN 0x501b > +#define OV8856_REG_MWB_B_GAIN 0x501d > +#define OV8856_DGTL_GAIN_MIN 0 > +#define OV8856_DGTL_GAIN_MAX 4095 > +#define OV8856_DGTL_GAIN_STEP 1 > +#define OV8856_DGTL_GAIN_DEFAULT 1024 > + > +/* Test Pattern Control */ > +#define OV8856_REG_TEST_PATTERN 0x5e00 > +#define OV8856_TEST_PATTERN_ENABLE BIT(7) > +#define OV8856_TEST_PATTERN_BAR_SHIFT 2 > + > +#define to_ov8856(_sd) container_of(_sd, struct ov8856, sd) > + > +enum { > + OV8856_LINK_FREQ_720MBPS, > + OV8856_LINK_FREQ_360MBPS, > +}; > + > +struct ov8856_reg { > + u16 address; > + u8 val; > +}; > + > +struct ov8856_reg_list { > + u32 num_of_regs; > + const struct ov8856_reg *regs; > +}; > + > +struct ov8856_link_freq_config { > + const struct ov8856_reg_list reg_list; > +}; > + > +struct ov8856_mode { > + /* Frame width in pixels */ > + u32 width; > + > + /* Frame height in pixels */ > + u32 height; > + > + /* Horizontal timining size */ > + u32 hts; > + > + /* Default vertical timining size */ > + u32 vts_def; > + > + /* Min vertical timining size */ > + u32 vts_min; > + > + /* Link frequency needed for this resolution */ > + u32 link_freq_index; > + > + /* Sensor register settings for this resolution */ > + const struct ov8856_reg_list reg_list; > +}; > + > +static const struct ov8856_reg mipi_data_rate_720mbps[] = { > + {0x0103, 0x01}, > + {0x0100, 0x00}, > + {0x0302, 0x4b}, > + {0x0303, 0x01}, > + {0x030b, 0x02}, > + {0x030d, 0x4b}, > + {0x031e, 0x0c}, > +}; > + > +static const struct ov8856_reg mipi_data_rate_360mbps[] = { > + {0x0103, 0x01}, > + {0x0100, 0x00}, > + {0x0302, 0x4b}, > + {0x0303, 0x03}, > + {0x030b, 0x02}, > + {0x030d, 0x4b}, > + {0x031e, 0x0c}, > +}; > + > +static const struct ov8856_reg mode_3280x2464_regs[] = { > + {0x3000, 0x20}, > + {0x3003, 0x08}, > + {0x300e, 0x20}, > + {0x3010, 0x00}, > + {0x3015, 0x84}, > + {0x3018, 0x72}, > + {0x3021, 0x23}, > + {0x3033, 0x24}, > + {0x3500, 0x00}, > + {0x3501, 0x9a}, > + {0x3502, 0x20}, > + {0x3503, 0x08}, > + {0x3505, 0x83}, > + {0x3508, 0x01}, > + {0x3509, 0x80}, > + {0x350c, 0x00}, > + {0x350d, 0x80}, > + {0x350e, 0x04}, > + {0x350f, 0x00}, > + {0x3510, 0x00}, > + {0x3511, 0x02}, > + {0x3512, 0x00}, > + {0x3600, 0x72}, > + {0x3601, 0x40}, > + {0x3602, 0x30}, > + {0x3610, 0xc5}, > + {0x3611, 0x58}, > + {0x3612, 0x5c}, > + {0x3613, 0xca}, > + {0x3614, 0x20}, > + {0x3628, 0xff}, > + {0x3629, 0xff}, > + {0x362a, 0xff}, > + {0x3633, 0x10}, > + {0x3634, 0x10}, > + {0x3635, 0x10}, > + {0x3636, 0x10}, > + {0x3663, 0x08}, > + {0x3669, 0x34}, > + {0x366e, 0x10}, > + {0x3706, 0x86}, > + {0x370b, 0x7e}, > + {0x3714, 0x23}, > + {0x3730, 0x12}, > + {0x3733, 0x10}, > + {0x3764, 0x00}, > + {0x3765, 0x00}, > + {0x3769, 0x62}, > + {0x376a, 0x2a}, > + {0x376b, 0x30}, > + {0x3780, 0x00}, > + {0x3781, 0x24}, > + {0x3782, 0x00}, > + {0x3783, 0x23}, > + {0x3798, 0x2f}, > + {0x37a1, 0x60}, > + {0x37a8, 0x6a}, > + {0x37ab, 0x3f}, > + {0x37c2, 0x04}, > + {0x37c3, 0xf1}, > + {0x37c9, 0x80}, > + {0x37cb, 0x16}, > + {0x37cc, 0x16}, > + {0x37cd, 0x16}, > + {0x37ce, 0x16}, > + {0x3800, 0x00}, > + {0x3801, 0x00}, > + {0x3802, 0x00}, > + {0x3803, 0x07}, > + {0x3804, 0x0c}, > + {0x3805, 0xdf}, > + {0x3806, 0x09}, > + {0x3807, 0xa6}, > + {0x3808, 0x0c}, > + {0x3809, 0xd0}, > + {0x380a, 0x09}, > + {0x380b, 0xa0}, > + {0x380c, 0x07}, > + {0x380d, 0x88}, > + {0x380e, 0x09}, > + {0x380f, 0xb8}, > + {0x3810, 0x00}, > + {0x3811, 0x00}, > + {0x3812, 0x00}, > + {0x3813, 0x00}, > + {0x3814, 0x01}, > + {0x3815, 0x01}, > + {0x3816, 0x00}, > + {0x3817, 0x00}, > + {0x3818, 0x00}, > + {0x3819, 0x10}, > + {0x3820, 0x80}, > + {0x3821, 0x46}, > + {0x382a, 0x01}, > + {0x382b, 0x01}, > + {0x3830, 0x06}, > + {0x3836, 0x02}, > + {0x3862, 0x04}, > + {0x3863, 0x08}, > + {0x3cc0, 0x33}, > + {0x3d85, 0x17}, > + {0x3d8c, 0x73}, > + {0x3d8d, 0xde}, > + {0x4001, 0xe0}, > + {0x4003, 0x40}, > + {0x4008, 0x00}, > + {0x4009, 0x0b}, > + {0x400a, 0x00}, > + {0x400b, 0x84}, > + {0x400f, 0x80}, > + {0x4010, 0xf0}, > + {0x4011, 0xff}, > + {0x4012, 0x02}, > + {0x4013, 0x01}, > + {0x4014, 0x01}, > + {0x4015, 0x01}, > + {0x4042, 0x00}, > + {0x4043, 0x80}, > + {0x4044, 0x00}, > + {0x4045, 0x80}, > + {0x4046, 0x00}, > + {0x4047, 0x80}, > + {0x4048, 0x00}, > + {0x4049, 0x80}, > + {0x4041, 0x03}, > + {0x404c, 0x20}, > + {0x404d, 0x00}, > + {0x404e, 0x20}, > + {0x4203, 0x80}, > + {0x4307, 0x30}, > + {0x4317, 0x00}, > + {0x4503, 0x08}, > + {0x4601, 0x80}, > + {0x4800, 0x44}, > + {0x4816, 0x53}, > + {0x481b, 0x58}, > + {0x481f, 0x27}, > + {0x4837, 0x16}, > + {0x483c, 0x0f}, > + {0x484b, 0x05}, > + {0x5000, 0x57}, > + {0x5001, 0x0a}, > + {0x5004, 0x04}, > + {0x502e, 0x03}, > + {0x5030, 0x41}, > + {0x5780, 0x14}, > + {0x5781, 0x0f}, > + {0x5782, 0x44}, > + {0x5783, 0x02}, > + {0x5784, 0x01}, > + {0x5785, 0x01}, > + {0x5786, 0x00}, > + {0x5787, 0x04}, > + {0x5788, 0x02}, > + {0x5789, 0x0f}, > + {0x578a, 0xfd}, > + {0x578b, 0xf5}, > + {0x578c, 0xf5}, > + {0x578d, 0x03}, > + {0x578e, 0x08}, > + {0x578f, 0x0c}, > + {0x5790, 0x08}, > + {0x5791, 0x04}, > + {0x5792, 0x00}, > + {0x5793, 0x52}, > + {0x5794, 0xa3}, > + {0x5795, 0x02}, > + {0x5796, 0x20}, > + {0x5797, 0x20}, > + {0x5798, 0xd5}, > + {0x5799, 0xd5}, > + {0x579a, 0x00}, > + {0x579b, 0x50}, > + {0x579c, 0x00}, > + {0x579d, 0x2c}, > + {0x579e, 0x0c}, > + {0x579f, 0x40}, > + {0x57a0, 0x09}, > + {0x57a1, 0x40}, > + {0x59f8, 0x3d}, > + {0x5a08, 0x02}, > + {0x5b00, 0x02}, > + {0x5b01, 0x10}, > + {0x5b02, 0x03}, > + {0x5b03, 0xcf}, > + {0x5b05, 0x6c}, > + {0x5e00, 0x00} > +}; > + > +static const struct ov8856_reg mode_1640x1232_regs[] = { > + {0x3000, 0x20}, > + {0x3003, 0x08}, > + {0x300e, 0x20}, > + {0x3010, 0x00}, > + {0x3015, 0x84}, > + {0x3018, 0x72}, > + {0x3021, 0x23}, > + {0x3033, 0x24}, > + {0x3500, 0x00}, > + {0x3501, 0x4c}, > + {0x3502, 0xe0}, > + {0x3503, 0x08}, > + {0x3505, 0x83}, > + {0x3508, 0x01}, > + {0x3509, 0x80}, > + {0x350c, 0x00}, > + {0x350d, 0x80}, > + {0x350e, 0x04}, > + {0x350f, 0x00}, > + {0x3510, 0x00}, > + {0x3511, 0x02}, > + {0x3512, 0x00}, > + {0x3600, 0x72}, > + {0x3601, 0x40}, > + {0x3602, 0x30}, > + {0x3610, 0xc5}, > + {0x3611, 0x58}, > + {0x3612, 0x5c}, > + {0x3613, 0xca}, > + {0x3614, 0x20}, > + {0x3628, 0xff}, > + {0x3629, 0xff}, > + {0x362a, 0xff}, > + {0x3633, 0x10}, > + {0x3634, 0x10}, > + {0x3635, 0x10}, > + {0x3636, 0x10}, > + {0x3663, 0x08}, > + {0x3669, 0x34}, > + {0x366e, 0x08}, > + {0x3706, 0x86}, > + {0x370b, 0x7e}, > + {0x3714, 0x27}, > + {0x3730, 0x12}, > + {0x3733, 0x10}, > + {0x3764, 0x00}, > + {0x3765, 0x00}, > + {0x3769, 0x62}, > + {0x376a, 0x2a}, > + {0x376b, 0x30}, > + {0x3780, 0x00}, > + {0x3781, 0x24}, > + {0x3782, 0x00}, > + {0x3783, 0x23}, > + {0x3798, 0x2f}, > + {0x37a1, 0x60}, > + {0x37a8, 0x6a}, > + {0x37ab, 0x3f}, > + {0x37c2, 0x14}, > + {0x37c3, 0xf1}, > + {0x37c9, 0x80}, > + {0x37cb, 0x16}, > + {0x37cc, 0x16}, > + {0x37cd, 0x16}, > + {0x37ce, 0x16}, > + {0x3800, 0x00}, > + {0x3801, 0x00}, > + {0x3802, 0x00}, > + {0x3803, 0x07}, > + {0x3804, 0x0c}, > + {0x3805, 0xdf}, > + {0x3806, 0x09}, > + {0x3807, 0xa6}, > + {0x3808, 0x06}, > + {0x3809, 0x68}, > + {0x380a, 0x04}, > + {0x380b, 0xd0}, > + {0x380c, 0x0e}, > + {0x380d, 0xec}, > + {0x380e, 0x04}, > + {0x380f, 0xe8}, > + {0x3810, 0x00}, > + {0x3811, 0x00}, > + {0x3812, 0x00}, > + {0x3813, 0x00}, > + {0x3814, 0x03}, > + {0x3815, 0x01}, > + {0x3816, 0x00}, > + {0x3817, 0x00}, > + {0x3818, 0x00}, > + {0x3819, 0x10}, > + {0x3820, 0x90}, > + {0x3821, 0x67}, > + {0x382a, 0x03}, > + {0x382b, 0x01}, > + {0x3830, 0x06}, > + {0x3836, 0x02}, > + {0x3862, 0x04}, > + {0x3863, 0x08}, > + {0x3cc0, 0x33}, > + {0x3d85, 0x17}, > + {0x3d8c, 0x73}, > + {0x3d8d, 0xde}, > + {0x4001, 0xe0}, > + {0x4003, 0x40}, > + {0x4008, 0x00}, > + {0x4009, 0x05}, > + {0x400a, 0x00}, > + {0x400b, 0x84}, > + {0x400f, 0x80}, > + {0x4010, 0xf0}, > + {0x4011, 0xff}, > + {0x4012, 0x02}, > + {0x4013, 0x01}, > + {0x4014, 0x01}, > + {0x4015, 0x01}, > + {0x4042, 0x00}, > + {0x4043, 0x80}, > + {0x4044, 0x00}, > + {0x4045, 0x80}, > + {0x4046, 0x00}, > + {0x4047, 0x80}, > + {0x4048, 0x00}, > + {0x4049, 0x80}, > + {0x4041, 0x03}, > + {0x404c, 0x20}, > + {0x404d, 0x00}, > + {0x404e, 0x20}, > + {0x4203, 0x80}, > + {0x4307, 0x30}, > + {0x4317, 0x00}, > + {0x4503, 0x08}, > + {0x4601, 0x80}, > + {0x4800, 0x44}, > + {0x4816, 0x53}, > + {0x481b, 0x58}, > + {0x481f, 0x27}, > + {0x4837, 0x16}, > + {0x483c, 0x0f}, > + {0x484b, 0x05}, > + {0x5000, 0x57}, > + {0x5001, 0x0a}, > + {0x5004, 0x04}, > + {0x502e, 0x03}, > + {0x5030, 0x41}, > + {0x5780, 0x14}, > + {0x5781, 0x0f}, > + {0x5782, 0x44}, > + {0x5783, 0x02}, > + {0x5784, 0x01}, > + {0x5785, 0x01}, > + {0x5786, 0x00}, > + {0x5787, 0x04}, > + {0x5788, 0x02}, > + {0x5789, 0x0f}, > + {0x578a, 0xfd}, > + {0x578b, 0xf5}, > + {0x578c, 0xf5}, > + {0x578d, 0x03}, > + {0x578e, 0x08}, > + {0x578f, 0x0c}, > + {0x5790, 0x08}, > + {0x5791, 0x04}, > + {0x5792, 0x00}, > + {0x5793, 0x52}, > + {0x5794, 0xa3}, > + {0x5795, 0x00}, > + {0x5796, 0x10}, > + {0x5797, 0x10}, > + {0x5798, 0x73}, > + {0x5799, 0x73}, > + {0x579a, 0x00}, > + {0x579b, 0x28}, > + {0x579c, 0x00}, > + {0x579d, 0x16}, > + {0x579e, 0x06}, > + {0x579f, 0x20}, > + {0x57a0, 0x04}, > + {0x57a1, 0xa0}, > + {0x59f8, 0x3d}, > + {0x5a08, 0x02}, > + {0x5b00, 0x02}, > + {0x5b01, 0x10}, > + {0x5b02, 0x03}, > + {0x5b03, 0xcf}, > + {0x5b05, 0x6c}, > + {0x5e00, 0x00} > +}; > + > +static const char * const ov8856_test_pattern_menu[] = { > + "Disabled", > + "Standard Color Bar", > + "Top-Bottom Darker Color Bar", > + "Right-Left Darker Color Bar", > + "Bottom-Top Darker Color Bar" > +}; > + > +static const s64 link_freq_menu_items[] = { > + OV8856_LINK_FREQ_360MHZ, > + OV8856_LINK_FREQ_180MHZ > +}; > + > +static const struct ov8856_link_freq_config link_freq_configs[] = { > + [OV8856_LINK_FREQ_720MBPS] = { > + .reg_list = { > + .num_of_regs = ARRAY_SIZE(mipi_data_rate_720mbps), > + .regs = mipi_data_rate_720mbps, > + } > + }, > + [OV8856_LINK_FREQ_360MBPS] = { > + .reg_list = { > + .num_of_regs = ARRAY_SIZE(mipi_data_rate_360mbps), > + .regs = mipi_data_rate_360mbps, > + } > + } > +}; > + > +static const struct ov8856_mode supported_modes[] = { > + { > + .width = 3280, > + .height = 2464, > + .hts = 1928, > + .vts_def = 2488, > + .vts_min = 2488, > + .reg_list = { > + .num_of_regs = ARRAY_SIZE(mode_3280x2464_regs), > + .regs = mode_3280x2464_regs, > + }, > + .link_freq_index = OV8856_LINK_FREQ_720MBPS, > + }, > + { > + .width = 1640, > + .height = 1232, > + .hts = 3820, > + .vts_def = 1256, > + .vts_min = 1256, > + .reg_list = { > + .num_of_regs = ARRAY_SIZE(mode_1640x1232_regs), > + .regs = mode_1640x1232_regs, > + }, > + .link_freq_index = OV8856_LINK_FREQ_360MBPS, > + } > +}; > + > +struct ov8856 { > + struct v4l2_subdev sd; > + struct media_pad pad; > + struct v4l2_ctrl_handler ctrl_handler; > + > + /* V4L2 Controls */ > + struct v4l2_ctrl *link_freq; > + struct v4l2_ctrl *pixel_rate; > + struct v4l2_ctrl *vblank; > + struct v4l2_ctrl *hblank; > + struct v4l2_ctrl *exposure; > + > + /* Current mode */ > + const struct ov8856_mode *cur_mode; > + > + /* To serialize asynchronus callbacks */ > + struct mutex mutex; > + > + /* Streaming on/off */ > + bool streaming; > +}; > + > +static u64 to_pixel_rate(u32 f_index) > +{ > + u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV8856_DATA_LANES; > + > + do_div(pixel_rate, OV8856_RGB_DEPTH); > + > + return pixel_rate; > +} > + > +static u64 to_pixels_per_line(u32 hts, u32 f_index) > +{ > + u64 ppl = hts * to_pixel_rate(f_index); > + > + do_div(ppl, OV8856_SCLK); > + > + return ppl; > +} > + > +static int ov8856_read_reg(struct ov8856 *ov8856, u16 reg, u16 len, u32 *val) > +{ > + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); > + struct i2c_msg msgs[2]; > + u8 *data_be_p; > + __be32 data_be = 0; > + __be16 reg_addr_be = cpu_to_be16(reg); > + int ret; > + > + if (len > 4) > + return -EINVAL; > + > + data_be_p = (u8 *)&data_be; > + msgs[0].addr = client->addr; > + msgs[0].flags = 0; > + msgs[0].len = 2; > + msgs[0].buf = (u8 *)®_addr_be; > + msgs[1].addr = client->addr; > + msgs[1].flags = I2C_M_RD; > + msgs[1].len = len; > + msgs[1].buf = &data_be_p[4 - len]; > + > + ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); > + if (ret != ARRAY_SIZE(msgs)) > + return -EIO; > + > + *val = be32_to_cpu(data_be); > + > + return 0; > +} > + > +static int ov8856_write_reg(struct ov8856 *ov8856, u16 reg, u16 len, u32 __val) > +{ > + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); > + unsigned int buf_i, val_i; > + u8 buf[6]; > + u8 *val_p; > + __be32 val; > + > + if (len > 4) > + return -EINVAL; > + > + buf[0] = reg >> 8; > + buf[1] = reg & 0xff; > + > + val = cpu_to_be32(__val); > + val_p = (u8 *)&val; > + buf_i = 2; > + val_i = 4 - len; > + > + while (val_i < 4) > + buf[buf_i++] = val_p[val_i++]; > + > + if (i2c_master_send(client, buf, len + 2) != len + 2) > + return -EIO; > + > + return 0; > +} > + > +static int ov8856_write_reg_list(struct ov8856 *ov8856, > + const struct ov8856_reg_list *r_list) > +{ > + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); > + unsigned int i; > + int ret; > + > + for (i = 0; i < r_list->num_of_regs; i++) { > + ret = ov8856_write_reg(ov8856, r_list->regs[i].address, 1, > + r_list->regs[i].val); > + if (ret) { > + dev_err_ratelimited(&client->dev, > + "failed to write reg 0x%4.4x. error = %d", > + r_list->regs[i].address, ret); > + return ret; > + } > + } > + > + return 0; > +} > + > +static int ov8856_update_digital_gain(struct ov8856 *ov8856, u32 d_gain) > +{ > + int ret; > + > + ret = ov8856_write_reg(ov8856, OV8856_REG_MWB_R_GAIN, > + OV8856_REG_VALUE_16BIT, d_gain); > + if (ret) > + return ret; > + > + ret = ov8856_write_reg(ov8856, OV8856_REG_MWB_G_GAIN, > + OV8856_REG_VALUE_16BIT, d_gain); > + if (ret) > + return ret; > + > + return ov8856_write_reg(ov8856, OV8856_REG_MWB_B_GAIN, > + OV8856_REG_VALUE_16BIT, d_gain); > +} > + > +static int ov8856_test_pattern(struct ov8856 *ov8856, u32 pattern) > +{ > + if (pattern) > + pattern = (pattern - 1) << OV8856_TEST_PATTERN_BAR_SHIFT | > + OV8856_TEST_PATTERN_ENABLE; > + > + return ov8856_write_reg(ov8856, OV8856_REG_TEST_PATTERN, > + OV8856_REG_VALUE_08BIT, pattern); > +} > + > +static int ov8856_set_ctrl(struct v4l2_ctrl *ctrl) > +{ > + struct ov8856 *ov8856 = container_of(ctrl->handler, > + struct ov8856, ctrl_handler); > + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); > + s64 exposure_max; > + int ret = 0; > + > + /* Propagate change of current control to all related controls */ > + if (ctrl->id == V4L2_CID_VBLANK) { > + /* Update max exposure while meeting expected vblanking */ > + exposure_max = ov8856->cur_mode->height + ctrl->val - > + OV8856_EXPOSURE_MAX_MARGIN; > + __v4l2_ctrl_modify_range(ov8856->exposure, > + ov8856->exposure->minimum, > + exposure_max, ov8856->exposure->step, > + exposure_max); > + } > + > + /* V4L2 controls values will be applied only when power is already up */ > + if (!pm_runtime_get_if_in_use(&client->dev)) > + return 0; > + > + switch (ctrl->id) { > + case V4L2_CID_ANALOGUE_GAIN: > + ret = ov8856_write_reg(ov8856, OV8856_REG_ANALOG_GAIN, > + OV8856_REG_VALUE_16BIT, ctrl->val); > + break; > + > + case V4L2_CID_DIGITAL_GAIN: > + ret = ov8856_update_digital_gain(ov8856, ctrl->val); > + break; > + > + case V4L2_CID_EXPOSURE: > + /* 4 least significant bits of expsoure are fractional part */ > + ret = ov8856_write_reg(ov8856, OV8856_REG_EXPOSURE, > + OV8856_REG_VALUE_24BIT, ctrl->val << 4); > + break; > + > + case V4L2_CID_VBLANK: > + ret = ov8856_write_reg(ov8856, OV8856_REG_VTS, > + OV8856_REG_VALUE_16BIT, > + ov8856->cur_mode->height + ctrl->val); > + break; > + > + case V4L2_CID_TEST_PATTERN: > + ret = ov8856_test_pattern(ov8856, ctrl->val); > + break; > + > + default: > + dev_info(&client->dev, "unhandled id:0x%x, val:0x%x", > + ctrl->id, ctrl->val); This should set ret accordingly. The message is not needed IMO though; up to you. > + break; > + } > + > + pm_runtime_put(&client->dev); > + > + return ret; > +} > + > +static const struct v4l2_ctrl_ops ov8856_ctrl_ops = { > + .s_ctrl = ov8856_set_ctrl, > +}; > + > +static int ov8856_init_controls(struct ov8856 *ov8856) > +{ > + struct v4l2_ctrl_handler *ctrl_hdlr; > + s64 exposure_max, h_blank; > + int ret; > + > + ctrl_hdlr = &ov8856->ctrl_handler; > + ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8); > + if (ret) > + return ret; > + > + ctrl_hdlr->lock = &ov8856->mutex; > + ov8856->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov8856_ctrl_ops, > + V4L2_CID_LINK_FREQ, > + ARRAY_SIZE(link_freq_menu_items) - 1, > + 0, link_freq_menu_items); > + if (ov8856->link_freq) > + ov8856->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; > + > + ov8856->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, > + V4L2_CID_PIXEL_RATE, 0, > + to_pixel_rate(OV8856_LINK_FREQ_720MBPS), > + 1, > + to_pixel_rate(OV8856_LINK_FREQ_720MBPS)); > + ov8856->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, > + V4L2_CID_VBLANK, > + ov8856->cur_mode->vts_min - ov8856->cur_mode->height, > + OV8856_VTS_MAX - ov8856->cur_mode->height, 1, > + ov8856->cur_mode->vts_def - ov8856->cur_mode->height); > + h_blank = to_pixels_per_line(ov8856->cur_mode->hts, > + ov8856->cur_mode->link_freq_index) - ov8856->cur_mode->width; > + ov8856->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, > + V4L2_CID_HBLANK, h_blank, h_blank, 1, > + h_blank); > + if (ov8856->hblank) > + ov8856->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; > + > + v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, > + OV8856_ANAL_GAIN_MIN, OV8856_ANAL_GAIN_MAX, > + OV8856_ANAL_GAIN_STEP, OV8856_ANAL_GAIN_MIN); > + v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_DIGITAL_GAIN, > + OV8856_DGTL_GAIN_MIN, OV8856_DGTL_GAIN_MAX, > + OV8856_DGTL_GAIN_STEP, OV8856_DGTL_GAIN_DEFAULT); > + exposure_max = ov8856->cur_mode->vts_def - OV8856_EXPOSURE_MAX_MARGIN; > + ov8856->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, > + V4L2_CID_EXPOSURE, > + OV8856_EXPOSURE_MIN, exposure_max, > + OV8856_EXPOSURE_STEP, > + exposure_max); > + v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov8856_ctrl_ops, > + V4L2_CID_TEST_PATTERN, > + ARRAY_SIZE(ov8856_test_pattern_menu) - 1, > + 0, 0, ov8856_test_pattern_menu); > + if (ctrl_hdlr->error) > + return ctrl_hdlr->error; > + > + ov8856->sd.ctrl_handler = ctrl_hdlr; > + > + return 0; > +} > + > +static void ov8856_update_pad_format(const struct ov8856_mode *mode, > + struct v4l2_mbus_framefmt *fmt) > +{ > + fmt->width = mode->width; > + fmt->height = mode->height; > + fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; > + fmt->field = V4L2_FIELD_NONE; > +} > + > +static int ov8856_start_streaming(struct ov8856 *ov8856) > +{ > + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); > + const struct ov8856_reg_list *reg_list; > + int link_freq_index, ret; > + > + link_freq_index = ov8856->cur_mode->link_freq_index; > + reg_list = &link_freq_configs[link_freq_index].reg_list; > + ret = ov8856_write_reg_list(ov8856, reg_list); > + if (ret) { > + dev_err(&client->dev, "failed to set plls"); > + return ret; > + } > + > + reg_list = &ov8856->cur_mode->reg_list; > + ret = ov8856_write_reg_list(ov8856, reg_list); > + if (ret) { > + dev_err(&client->dev, "failed to set mode"); > + return ret; > + } > + > + ret = __v4l2_ctrl_handler_setup(ov8856->sd.ctrl_handler); > + if (ret) > + return ret; > + > + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, > + OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING); > + if (ret) { > + dev_err(&client->dev, "failed to set stream"); > + return ret; > + } > + > + return 0; > +} > + > +static void ov8856_stop_streaming(struct ov8856 *ov8856) > +{ > + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); > + > + if (ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, > + OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY)) Wrong indentation. > + dev_err(&client->dev, "failed to set stream"); > +} > + > +static int ov8856_set_stream(struct v4l2_subdev *sd, int enable) > +{ > + struct ov8856 *ov8856 = to_ov8856(sd); > + struct i2c_client *client = v4l2_get_subdevdata(sd); > + int ret = 0; > + > + if (ov8856->streaming == enable) > + return 0; > + > + mutex_lock(&ov8856->mutex); > + if (enable) { > + ret = pm_runtime_get_sync(&client->dev); > + if (ret < 0) { > + pm_runtime_put_noidle(&client->dev); > + mutex_unlock(&ov8856->mutex); > + return ret; > + } > + > + ret = ov8856_start_streaming(ov8856); > + if (ret) { > + enable = 0; > + ov8856_stop_streaming(ov8856); > + pm_runtime_put(&client->dev); > + } > + } else { > + ov8856_stop_streaming(ov8856); > + pm_runtime_put(&client->dev); > + } > + > + ov8856->streaming = enable; > + mutex_unlock(&ov8856->mutex); > + > + return ret; > +} > + > +static int __maybe_unused ov8856_suspend(struct device *dev) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > + struct ov8856 *ov8856 = to_ov8856(sd); > + > + mutex_lock(&ov8856->mutex); > + if (ov8856->streaming) > + ov8856_stop_streaming(ov8856); > + > + mutex_unlock(&ov8856->mutex); > + > + return 0; > +} > + > +static int __maybe_unused ov8856_resume(struct device *dev) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > + struct ov8856 *ov8856 = to_ov8856(sd); > + int ret; > + > + mutex_lock(&ov8856->mutex); > + if (ov8856->streaming) { > + ret = ov8856_start_streaming(ov8856); > + if (ret) { > + ov8856->streaming = false; > + ov8856_stop_streaming(ov8856); > + mutex_unlock(&ov8856->mutex); > + return ret; > + } > + } > + > + mutex_unlock(&ov8856->mutex); > + > + return 0; > +} > + > +static int ov8856_set_format(struct v4l2_subdev *sd, > + struct v4l2_subdev_pad_config *cfg, > + struct v4l2_subdev_format *fmt) > +{ > + struct ov8856 *ov8856 = to_ov8856(sd); > + const struct ov8856_mode *mode; > + s32 vblank_def, h_blank; > + > + mode = v4l2_find_nearest_size(supported_modes, > + ARRAY_SIZE(supported_modes), width, > + height, fmt->format.width, > + fmt->format.height); > + > + mutex_lock(&ov8856->mutex); > + ov8856_update_pad_format(mode, &fmt->format); > + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { > + *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format; > + } else { > + ov8856->cur_mode = mode; > + __v4l2_ctrl_s_ctrl(ov8856->link_freq, mode->link_freq_index); > + __v4l2_ctrl_s_ctrl_int64(ov8856->pixel_rate, > + to_pixel_rate(mode->link_freq_index)); > + > + /* Update limits and set FPS to default */ > + vblank_def = mode->vts_def - mode->height; > + __v4l2_ctrl_modify_range(ov8856->vblank, > + mode->vts_min - mode->height, > + OV8856_VTS_MAX - mode->height, 1, > + vblank_def); > + __v4l2_ctrl_s_ctrl(ov8856->vblank, vblank_def); > + h_blank = to_pixels_per_line(mode->hts, mode->link_freq_index) - > + mode->width; > + __v4l2_ctrl_modify_range(ov8856->hblank, h_blank, h_blank, 1, > + h_blank); > + } > + > + mutex_unlock(&ov8856->mutex); > + > + return 0; > +} > + > +static int ov8856_get_format(struct v4l2_subdev *sd, > + struct v4l2_subdev_pad_config *cfg, > + struct v4l2_subdev_format *fmt) > +{ > + struct ov8856 *ov8856 = to_ov8856(sd); > + > + mutex_lock(&ov8856->mutex); > + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) > + fmt->format = *v4l2_subdev_get_try_format(&ov8856->sd, cfg, > + fmt->pad); > + else > + ov8856_update_pad_format(ov8856->cur_mode, &fmt->format); > + > + mutex_unlock(&ov8856->mutex); > + > + return 0; > +} > + > +static int ov8856_enum_mbus_code(struct v4l2_subdev *sd, > + struct v4l2_subdev_pad_config *cfg, > + struct v4l2_subdev_mbus_code_enum *code) > +{ > + /* Only one bayer order GRBG is supported */ > + if (code->index > 0) > + return -EINVAL; > + > + code->code = MEDIA_BUS_FMT_SGRBG10_1X10; > + > + return 0; > +} > + > +static int ov8856_enum_frame_size(struct v4l2_subdev *sd, > + struct v4l2_subdev_pad_config *cfg, > + struct v4l2_subdev_frame_size_enum *fse) > +{ > + if (fse->index >= ARRAY_SIZE(supported_modes)) > + return -EINVAL; > + > + if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10) > + return -EINVAL; > + > + fse->min_width = supported_modes[fse->index].width; > + fse->max_width = fse->min_width; > + fse->min_height = supported_modes[fse->index].height; > + fse->max_height = fse->min_height; > + > + return 0; > +} > + > +static int ov8856_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) > +{ > + struct ov8856 *ov8856 = to_ov8856(sd); > + > + mutex_lock(&ov8856->mutex); > + ov8856_update_pad_format(&supported_modes[0], > + v4l2_subdev_get_try_format(sd, fh->pad, 0)); > + mutex_unlock(&ov8856->mutex); > + > + return 0; > +} > + > +static const struct v4l2_subdev_video_ops ov8856_video_ops = { > + .s_stream = ov8856_set_stream, > +}; > + > +static const struct v4l2_subdev_pad_ops ov8856_pad_ops = { > + .set_fmt = ov8856_set_format, > + .get_fmt = ov8856_get_format, > + .enum_mbus_code = ov8856_enum_mbus_code, > + .enum_frame_size = ov8856_enum_frame_size, > +}; > + > +static const struct v4l2_subdev_ops ov8856_subdev_ops = { > + .video = &ov8856_video_ops, > + .pad = &ov8856_pad_ops, > +}; > + > +static const struct media_entity_operations ov8856_subdev_entity_ops = { > + .link_validate = v4l2_subdev_link_validate, > +}; > + > +static const struct v4l2_subdev_internal_ops ov8856_internal_ops = { > + .open = ov8856_open, > +}; > + > +static int ov8856_identify_module(struct ov8856 *ov8856) > +{ > + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); > + int ret; > + u32 val; > + > + ret = ov8856_read_reg(ov8856, OV8856_REG_CHIP_ID, > + OV8856_REG_VALUE_24BIT, &val); > + if (ret) > + return ret; > + > + if (val != OV8856_CHIP_ID) { > + dev_err(&client->dev, "chip id mismatch: %x!=%x", > + OV8856_CHIP_ID, val); > + return -ENXIO; > + } > + > + return 0; > +} > + > +static int ov8856_check_hwcfg(struct device *dev) > +{ > + struct fwnode_handle *ep; > + struct fwnode_handle *fwnode = dev_fwnode(dev); > + struct v4l2_fwnode_endpoint bus_cfg = { > + .bus_type = V4L2_MBUS_CSI2_DPHY > + }; > + u32 mclk; > + int ret; > + unsigned int i, j; > + > + if (!fwnode) > + return -ENXIO; > + > + fwnode_property_read_u32(fwnode, "clock-frequency", &mclk); > + if (mclk != OV8856_MCLK) { > + dev_err(dev, "external clock %d is not supported", mclk); > + return -EINVAL; > + } > + > + ep = fwnode_graph_get_next_endpoint(fwnode, NULL); > + if (!ep) > + return -ENXIO; > + > + ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); > + fwnode_handle_put(ep); > + if (ret) > + return ret; > + > + if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV8856_DATA_LANES) { > + dev_err(dev, "number of CSI2 data lanes %d is not supported", > + bus_cfg.bus.mipi_csi2.num_data_lanes); > + ret = -EINVAL; > + goto check_hwcfg_error; > + } > + > + if (!bus_cfg.nr_of_link_frequencies) { > + dev_err(dev, "no link frequencies defined"); > + ret = -EINVAL; > + goto check_hwcfg_error; > + } > + > + for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) { > + for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) { > + if (link_freq_menu_items[i] == > + bus_cfg.link_frequencies[j]) > + break; > + } > + > + if (j == bus_cfg.nr_of_link_frequencies) { > + dev_err(dev, "no link frequency %lld supported", > + link_freq_menu_items[i]); > + ret = -EINVAL; > + goto check_hwcfg_error; > + } > + } > + > +check_hwcfg_error: > + v4l2_fwnode_endpoint_free(&bus_cfg); > + > + return ret; > +} > + > +static int ov8856_remove(struct i2c_client *client) > +{ > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > + struct ov8856 *ov8856 = to_ov8856(sd); > + > + v4l2_async_unregister_subdev(sd); > + media_entity_cleanup(&sd->entity); > + v4l2_ctrl_handler_free(sd->ctrl_handler); > + pm_runtime_disable(&client->dev); > + mutex_destroy(&ov8856->mutex); > + > + return 0; > +} > + > +static int ov8856_probe(struct i2c_client *client) > +{ > + struct ov8856 *ov8856; > + int ret; > + > + ret = ov8856_check_hwcfg(&client->dev); > + if (ret) { > + dev_err(&client->dev, "failed to check HW configuration: %d", > + ret); > + return ret; > + } > + > + ov8856 = devm_kzalloc(&client->dev, sizeof(*ov8856), GFP_KERNEL); > + if (!ov8856) > + return -ENOMEM; > + > + v4l2_i2c_subdev_init(&ov8856->sd, client, &ov8856_subdev_ops); > + ret = ov8856_identify_module(ov8856); > + if (ret) { > + dev_err(&client->dev, "failed to find sensor: %d", ret); > + return ret; > + } > + > + mutex_init(&ov8856->mutex); > + ov8856->cur_mode = &supported_modes[0]; > + ret = ov8856_init_controls(ov8856); > + if (ret) { > + dev_err(&client->dev, "failed to init controls: %d", ret); > + goto probe_error_v4l2_ctrl_handler_free; > + } > + > + ov8856->sd.internal_ops = &ov8856_internal_ops; > + ov8856->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; > + ov8856->sd.entity.ops = &ov8856_subdev_entity_ops; > + ov8856->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; > + ov8856->pad.flags = MEDIA_PAD_FL_SOURCE; > + ret = media_entity_pads_init(&ov8856->sd.entity, 1, &ov8856->pad); > + if (ret) { > + dev_err(&client->dev, "failed to init entity pads: %d", ret); > + goto probe_error_v4l2_ctrl_handler_free; > + } > + > + ret = v4l2_async_register_subdev_sensor_common(&ov8856->sd); > + if (ret < 0) { > + dev_err(&client->dev, "failed to register V4L2 subdev: %d", > + ret); > + goto probe_error_media_entity_cleanup; > + } > + > + /* > + * Device is already turned on by i2c-core with ACPI domain PM. > + * Enable runtime PM and turn off the device. > + */ > + pm_runtime_set_active(&client->dev); > + pm_runtime_enable(&client->dev); > + pm_runtime_idle(&client->dev); > + > + return 0; > + > +probe_error_media_entity_cleanup: > + media_entity_cleanup(&ov8856->sd.entity); > + > +probe_error_v4l2_ctrl_handler_free: > + v4l2_ctrl_handler_free(ov8856->sd.ctrl_handler); > + mutex_destroy(&ov8856->mutex); > + > + return ret; > +} > + > +static const struct dev_pm_ops ov8856_pm_ops = { > + SET_SYSTEM_SLEEP_PM_OPS(ov8856_suspend, ov8856_resume) > +}; > + > +#ifdef CONFIG_ACPI > +static const struct acpi_device_id ov8856_acpi_ids[] = { > + {"OVTI8856"}, > + {} > +}; > + > +MODULE_DEVICE_TABLE(acpi, ov8856_acpi_ids); > +#endif > + > +static struct i2c_driver ov8856_i2c_driver = { > + .driver = { > + .name = "ov8856", > + .pm = &ov8856_pm_ops, > + .acpi_match_table = ACPI_PTR(ov8856_acpi_ids), > + }, > + .probe_new = ov8856_probe, > + .remove = ov8856_remove, > +}; > + > +module_i2c_driver(ov8856_i2c_driver); > + > +MODULE_AUTHOR("Ben Kao <ben.kao@intel.com>"); > +MODULE_DESCRIPTION("OmniVision OV8856 sensor driver"); > +MODULE_LICENSE("GPL v2");
Hi Ben, On Fri, Jan 11, 2019 at 12:12 PM Ben Kao <ben.kao@intel.com> wrote: > > This patch adds driver for Omnivision's ov8856 sensor, > the driver supports following features: [snip] > +static int ov8856_write_reg(struct ov8856 *ov8856, u16 reg, u16 len, u32 __val) > +{ > + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); > + unsigned int buf_i, val_i; > + u8 buf[6]; > + u8 *val_p; > + __be32 val; > + > + if (len > 4) > + return -EINVAL; > + > + buf[0] = reg >> 8; > + buf[1] = reg & 0xff; The two lines above can be simplified into one put_unaligned_be16(reg, buf); > + > + val = cpu_to_be32(__val); > + val_p = (u8 *)&val; > + buf_i = 2; > + val_i = 4 - len; > + > + while (val_i < 4) > + buf[buf_i++] = val_p[val_i++]; All the code above can be simplified into: val <<= 8 * (4 - len); put_unaligned_be32(val, buf + 2); > + > + if (i2c_master_send(client, buf, len + 2) != len + 2) > + return -EIO; > + > + return 0; > +} Best regards, Tomasz
Hi Ben,
You are referring to older type of sensor i2c control. You can refer to IMX258 driver.
drivers/media/i2c/imx258.c
/* Write registers up to 2 at a time */
static int imx258_write_reg(struct imx258 *imx258, u16 reg, u32 len, u32 val)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx258->sd);
u8 buf[6];
if (len > 4)
return -EINVAL;
put_unaligned_be16(reg, buf);
put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
if (i2c_master_send(client, buf, len + 2) != len + 2)
return -EIO;
return 0;
}
Regards, Andy
>-----Original Message-----
>From: Tomasz Figa [mailto:tfiga@chromium.org]
>Sent: Tuesday, January 15, 2019 11:23 AM
>To: Kao, Ben <ben.kao@intel.com>
>Cc: Linux Media Mailing List <linux-media@vger.kernel.org>; Sakari Ailus
><sakari.ailus@linux.intel.com>; Yeh, Andy <andy.yeh@intel.com>
>Subject: Re: [PATCH v2] media: ov8856: Add support for OV8856 sensor
>
>Hi Ben,
>
>On Fri, Jan 11, 2019 at 12:12 PM Ben Kao <ben.kao@intel.com> wrote:
>>
>> This patch adds driver for Omnivision's ov8856 sensor, the driver
>> supports following features:
>[snip]
>> +static int ov8856_write_reg(struct ov8856 *ov8856, u16 reg, u16 len,
>> +u32 __val) {
>> + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
>> + unsigned int buf_i, val_i;
>> + u8 buf[6];
>> + u8 *val_p;
>> + __be32 val;
>> +
>> + if (len > 4)
>> + return -EINVAL;
>> +
>> + buf[0] = reg >> 8;
>> + buf[1] = reg & 0xff;
>
>The two lines above can be simplified into one put_unaligned_be16(reg, buf);
>
>> +
>> + val = cpu_to_be32(__val);
>> + val_p = (u8 *)&val;
>> + buf_i = 2;
>> + val_i = 4 - len;
>> +
>> + while (val_i < 4)
>> + buf[buf_i++] = val_p[val_i++];
>
>All the code above can be simplified into:
>
>val <<= 8 * (4 - len);
>put_unaligned_be32(val, buf + 2);
>
>> +
>> + if (i2c_master_send(client, buf, len + 2) != len + 2)
>> + return -EIO;
>> +
>> + return 0;
>> +}
>
>Best regards,
>Tomasz
diff --git a/MAINTAINERS b/MAINTAINERS index 0767f1d..74d4d50 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11068,6 +11068,13 @@ S: Maintained F: drivers/media/i2c/ov7740.c F: Documentation/devicetree/bindings/media/i2c/ov7740.txt +OMNIVISION OV8856 SENSOR DRIVER +M: Ben Kao <ben.kao@intel.com> +L: linux-media@vger.kernel.org +T: git git://linuxtv.org/media_tree.git +S: Maintained +F: drivers/media/i2c/ov8856.c + OMNIVISION OV9650 SENSOR DRIVER M: Sakari Ailus <sakari.ailus@linux.intel.com> R: Akinobu Mita <akinobu.mita@gmail.com> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 704af21..4fdcb92 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -806,6 +806,18 @@ config VIDEO_OV7740 This is a Video4Linux2 sensor driver for the OmniVision OV7740 VGA camera sensor. +config VIDEO_OV8856 + tristate "OmniVision OV8856 sensor support" + depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API + depends on MEDIA_CAMERA_SUPPORT + select V4L2_FWNODE + help + This is a Video4Linux2 sensor driver for the OmniVision + OV8856 camera sensor. + + To compile this driver as a module, choose M here: the + module will be called ov8856. + config VIDEO_OV9650 tristate "OmniVision OV9650/OV9652 sensor support" depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index 260d4d9..47accb0 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -78,6 +78,7 @@ obj-$(CONFIG_VIDEO_OV7640) += ov7640.o obj-$(CONFIG_VIDEO_OV7670) += ov7670.o obj-$(CONFIG_VIDEO_OV772X) += ov772x.o obj-$(CONFIG_VIDEO_OV7740) += ov7740.o +obj-$(CONFIG_VIDEO_OV8856) += ov8856.o obj-$(CONFIG_VIDEO_OV9650) += ov9650.o obj-$(CONFIG_VIDEO_OV13858) += ov13858.o obj-$(CONFIG_VIDEO_MT9M032) += mt9m032.o diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c new file mode 100644 index 0000000..375f9bd --- /dev/null +++ b/drivers/media/i2c/ov8856.c @@ -0,0 +1,1285 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018 Intel Corporation. + +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-fwnode.h> + +#ifndef V4L2_CID_DIGITAL_GAIN +#define V4L2_CID_DIGITAL_GAIN V4L2_CID_GAIN +#endif + +#define OV8856_REG_VALUE_08BIT 1 +#define OV8856_REG_VALUE_16BIT 2 +#define OV8856_REG_VALUE_24BIT 3 + +#define OV8856_LINK_FREQ_360MHZ 360000000ULL +#define OV8856_LINK_FREQ_180MHZ 180000000ULL +#define OV8856_SCLK 144000000ULL +#define OV8856_MCLK 19200000 +#define OV8856_DATA_LANES 4 +#define OV8856_RGB_DEPTH 10 + +#define OV8856_REG_CHIP_ID 0x300a +#define OV8856_CHIP_ID 0x00885a + +#define OV8856_REG_MODE_SELECT 0x0100 +#define OV8856_MODE_STANDBY 0x00 +#define OV8856_MODE_STREAMING 0x01 + +/* vertical-timings from sensor */ +#define OV8856_REG_VTS 0x380e +#define OV8856_VTS_MAX 0x7fff + +/* horizontal-timings from sensor */ +#define OV8856_REG_HTS 0x380c + +/* Exposure controls from sensor */ +#define OV8856_REG_EXPOSURE 0x3500 +#define OV8856_EXPOSURE_MIN 6 +#define OV8856_EXPOSURE_MAX_MARGIN 6 +#define OV8856_EXPOSURE_STEP 1 + +/* Analog gain controls from sensor */ +#define OV8856_REG_ANALOG_GAIN 0x3508 +#define OV8856_ANAL_GAIN_MIN 128 +#define OV8856_ANAL_GAIN_MAX 2047 +#define OV8856_ANAL_GAIN_STEP 1 + +/* Digital gain controls from sensor */ +#define OV8856_REG_MWB_R_GAIN 0x5019 +#define OV8856_REG_MWB_G_GAIN 0x501b +#define OV8856_REG_MWB_B_GAIN 0x501d +#define OV8856_DGTL_GAIN_MIN 0 +#define OV8856_DGTL_GAIN_MAX 4095 +#define OV8856_DGTL_GAIN_STEP 1 +#define OV8856_DGTL_GAIN_DEFAULT 1024 + +/* Test Pattern Control */ +#define OV8856_REG_TEST_PATTERN 0x5e00 +#define OV8856_TEST_PATTERN_ENABLE BIT(7) +#define OV8856_TEST_PATTERN_BAR_SHIFT 2 + +#define to_ov8856(_sd) container_of(_sd, struct ov8856, sd) + +enum { + OV8856_LINK_FREQ_720MBPS, + OV8856_LINK_FREQ_360MBPS, +}; + +struct ov8856_reg { + u16 address; + u8 val; +}; + +struct ov8856_reg_list { + u32 num_of_regs; + const struct ov8856_reg *regs; +}; + +struct ov8856_link_freq_config { + const struct ov8856_reg_list reg_list; +}; + +struct ov8856_mode { + /* Frame width in pixels */ + u32 width; + + /* Frame height in pixels */ + u32 height; + + /* Horizontal timining size */ + u32 hts; + + /* Default vertical timining size */ + u32 vts_def; + + /* Min vertical timining size */ + u32 vts_min; + + /* Link frequency needed for this resolution */ + u32 link_freq_index; + + /* Sensor register settings for this resolution */ + const struct ov8856_reg_list reg_list; +}; + +static const struct ov8856_reg mipi_data_rate_720mbps[] = { + {0x0103, 0x01}, + {0x0100, 0x00}, + {0x0302, 0x4b}, + {0x0303, 0x01}, + {0x030b, 0x02}, + {0x030d, 0x4b}, + {0x031e, 0x0c}, +}; + +static const struct ov8856_reg mipi_data_rate_360mbps[] = { + {0x0103, 0x01}, + {0x0100, 0x00}, + {0x0302, 0x4b}, + {0x0303, 0x03}, + {0x030b, 0x02}, + {0x030d, 0x4b}, + {0x031e, 0x0c}, +}; + +static const struct ov8856_reg mode_3280x2464_regs[] = { + {0x3000, 0x20}, + {0x3003, 0x08}, + {0x300e, 0x20}, + {0x3010, 0x00}, + {0x3015, 0x84}, + {0x3018, 0x72}, + {0x3021, 0x23}, + {0x3033, 0x24}, + {0x3500, 0x00}, + {0x3501, 0x9a}, + {0x3502, 0x20}, + {0x3503, 0x08}, + {0x3505, 0x83}, + {0x3508, 0x01}, + {0x3509, 0x80}, + {0x350c, 0x00}, + {0x350d, 0x80}, + {0x350e, 0x04}, + {0x350f, 0x00}, + {0x3510, 0x00}, + {0x3511, 0x02}, + {0x3512, 0x00}, + {0x3600, 0x72}, + {0x3601, 0x40}, + {0x3602, 0x30}, + {0x3610, 0xc5}, + {0x3611, 0x58}, + {0x3612, 0x5c}, + {0x3613, 0xca}, + {0x3614, 0x20}, + {0x3628, 0xff}, + {0x3629, 0xff}, + {0x362a, 0xff}, + {0x3633, 0x10}, + {0x3634, 0x10}, + {0x3635, 0x10}, + {0x3636, 0x10}, + {0x3663, 0x08}, + {0x3669, 0x34}, + {0x366e, 0x10}, + {0x3706, 0x86}, + {0x370b, 0x7e}, + {0x3714, 0x23}, + {0x3730, 0x12}, + {0x3733, 0x10}, + {0x3764, 0x00}, + {0x3765, 0x00}, + {0x3769, 0x62}, + {0x376a, 0x2a}, + {0x376b, 0x30}, + {0x3780, 0x00}, + {0x3781, 0x24}, + {0x3782, 0x00}, + {0x3783, 0x23}, + {0x3798, 0x2f}, + {0x37a1, 0x60}, + {0x37a8, 0x6a}, + {0x37ab, 0x3f}, + {0x37c2, 0x04}, + {0x37c3, 0xf1}, + {0x37c9, 0x80}, + {0x37cb, 0x16}, + {0x37cc, 0x16}, + {0x37cd, 0x16}, + {0x37ce, 0x16}, + {0x3800, 0x00}, + {0x3801, 0x00}, + {0x3802, 0x00}, + {0x3803, 0x07}, + {0x3804, 0x0c}, + {0x3805, 0xdf}, + {0x3806, 0x09}, + {0x3807, 0xa6}, + {0x3808, 0x0c}, + {0x3809, 0xd0}, + {0x380a, 0x09}, + {0x380b, 0xa0}, + {0x380c, 0x07}, + {0x380d, 0x88}, + {0x380e, 0x09}, + {0x380f, 0xb8}, + {0x3810, 0x00}, + {0x3811, 0x00}, + {0x3812, 0x00}, + {0x3813, 0x00}, + {0x3814, 0x01}, + {0x3815, 0x01}, + {0x3816, 0x00}, + {0x3817, 0x00}, + {0x3818, 0x00}, + {0x3819, 0x10}, + {0x3820, 0x80}, + {0x3821, 0x46}, + {0x382a, 0x01}, + {0x382b, 0x01}, + {0x3830, 0x06}, + {0x3836, 0x02}, + {0x3862, 0x04}, + {0x3863, 0x08}, + {0x3cc0, 0x33}, + {0x3d85, 0x17}, + {0x3d8c, 0x73}, + {0x3d8d, 0xde}, + {0x4001, 0xe0}, + {0x4003, 0x40}, + {0x4008, 0x00}, + {0x4009, 0x0b}, + {0x400a, 0x00}, + {0x400b, 0x84}, + {0x400f, 0x80}, + {0x4010, 0xf0}, + {0x4011, 0xff}, + {0x4012, 0x02}, + {0x4013, 0x01}, + {0x4014, 0x01}, + {0x4015, 0x01}, + {0x4042, 0x00}, + {0x4043, 0x80}, + {0x4044, 0x00}, + {0x4045, 0x80}, + {0x4046, 0x00}, + {0x4047, 0x80}, + {0x4048, 0x00}, + {0x4049, 0x80}, + {0x4041, 0x03}, + {0x404c, 0x20}, + {0x404d, 0x00}, + {0x404e, 0x20}, + {0x4203, 0x80}, + {0x4307, 0x30}, + {0x4317, 0x00}, + {0x4503, 0x08}, + {0x4601, 0x80}, + {0x4800, 0x44}, + {0x4816, 0x53}, + {0x481b, 0x58}, + {0x481f, 0x27}, + {0x4837, 0x16}, + {0x483c, 0x0f}, + {0x484b, 0x05}, + {0x5000, 0x57}, + {0x5001, 0x0a}, + {0x5004, 0x04}, + {0x502e, 0x03}, + {0x5030, 0x41}, + {0x5780, 0x14}, + {0x5781, 0x0f}, + {0x5782, 0x44}, + {0x5783, 0x02}, + {0x5784, 0x01}, + {0x5785, 0x01}, + {0x5786, 0x00}, + {0x5787, 0x04}, + {0x5788, 0x02}, + {0x5789, 0x0f}, + {0x578a, 0xfd}, + {0x578b, 0xf5}, + {0x578c, 0xf5}, + {0x578d, 0x03}, + {0x578e, 0x08}, + {0x578f, 0x0c}, + {0x5790, 0x08}, + {0x5791, 0x04}, + {0x5792, 0x00}, + {0x5793, 0x52}, + {0x5794, 0xa3}, + {0x5795, 0x02}, + {0x5796, 0x20}, + {0x5797, 0x20}, + {0x5798, 0xd5}, + {0x5799, 0xd5}, + {0x579a, 0x00}, + {0x579b, 0x50}, + {0x579c, 0x00}, + {0x579d, 0x2c}, + {0x579e, 0x0c}, + {0x579f, 0x40}, + {0x57a0, 0x09}, + {0x57a1, 0x40}, + {0x59f8, 0x3d}, + {0x5a08, 0x02}, + {0x5b00, 0x02}, + {0x5b01, 0x10}, + {0x5b02, 0x03}, + {0x5b03, 0xcf}, + {0x5b05, 0x6c}, + {0x5e00, 0x00} +}; + +static const struct ov8856_reg mode_1640x1232_regs[] = { + {0x3000, 0x20}, + {0x3003, 0x08}, + {0x300e, 0x20}, + {0x3010, 0x00}, + {0x3015, 0x84}, + {0x3018, 0x72}, + {0x3021, 0x23}, + {0x3033, 0x24}, + {0x3500, 0x00}, + {0x3501, 0x4c}, + {0x3502, 0xe0}, + {0x3503, 0x08}, + {0x3505, 0x83}, + {0x3508, 0x01}, + {0x3509, 0x80}, + {0x350c, 0x00}, + {0x350d, 0x80}, + {0x350e, 0x04}, + {0x350f, 0x00}, + {0x3510, 0x00}, + {0x3511, 0x02}, + {0x3512, 0x00}, + {0x3600, 0x72}, + {0x3601, 0x40}, + {0x3602, 0x30}, + {0x3610, 0xc5}, + {0x3611, 0x58}, + {0x3612, 0x5c}, + {0x3613, 0xca}, + {0x3614, 0x20}, + {0x3628, 0xff}, + {0x3629, 0xff}, + {0x362a, 0xff}, + {0x3633, 0x10}, + {0x3634, 0x10}, + {0x3635, 0x10}, + {0x3636, 0x10}, + {0x3663, 0x08}, + {0x3669, 0x34}, + {0x366e, 0x08}, + {0x3706, 0x86}, + {0x370b, 0x7e}, + {0x3714, 0x27}, + {0x3730, 0x12}, + {0x3733, 0x10}, + {0x3764, 0x00}, + {0x3765, 0x00}, + {0x3769, 0x62}, + {0x376a, 0x2a}, + {0x376b, 0x30}, + {0x3780, 0x00}, + {0x3781, 0x24}, + {0x3782, 0x00}, + {0x3783, 0x23}, + {0x3798, 0x2f}, + {0x37a1, 0x60}, + {0x37a8, 0x6a}, + {0x37ab, 0x3f}, + {0x37c2, 0x14}, + {0x37c3, 0xf1}, + {0x37c9, 0x80}, + {0x37cb, 0x16}, + {0x37cc, 0x16}, + {0x37cd, 0x16}, + {0x37ce, 0x16}, + {0x3800, 0x00}, + {0x3801, 0x00}, + {0x3802, 0x00}, + {0x3803, 0x07}, + {0x3804, 0x0c}, + {0x3805, 0xdf}, + {0x3806, 0x09}, + {0x3807, 0xa6}, + {0x3808, 0x06}, + {0x3809, 0x68}, + {0x380a, 0x04}, + {0x380b, 0xd0}, + {0x380c, 0x0e}, + {0x380d, 0xec}, + {0x380e, 0x04}, + {0x380f, 0xe8}, + {0x3810, 0x00}, + {0x3811, 0x00}, + {0x3812, 0x00}, + {0x3813, 0x00}, + {0x3814, 0x03}, + {0x3815, 0x01}, + {0x3816, 0x00}, + {0x3817, 0x00}, + {0x3818, 0x00}, + {0x3819, 0x10}, + {0x3820, 0x90}, + {0x3821, 0x67}, + {0x382a, 0x03}, + {0x382b, 0x01}, + {0x3830, 0x06}, + {0x3836, 0x02}, + {0x3862, 0x04}, + {0x3863, 0x08}, + {0x3cc0, 0x33}, + {0x3d85, 0x17}, + {0x3d8c, 0x73}, + {0x3d8d, 0xde}, + {0x4001, 0xe0}, + {0x4003, 0x40}, + {0x4008, 0x00}, + {0x4009, 0x05}, + {0x400a, 0x00}, + {0x400b, 0x84}, + {0x400f, 0x80}, + {0x4010, 0xf0}, + {0x4011, 0xff}, + {0x4012, 0x02}, + {0x4013, 0x01}, + {0x4014, 0x01}, + {0x4015, 0x01}, + {0x4042, 0x00}, + {0x4043, 0x80}, + {0x4044, 0x00}, + {0x4045, 0x80}, + {0x4046, 0x00}, + {0x4047, 0x80}, + {0x4048, 0x00}, + {0x4049, 0x80}, + {0x4041, 0x03}, + {0x404c, 0x20}, + {0x404d, 0x00}, + {0x404e, 0x20}, + {0x4203, 0x80}, + {0x4307, 0x30}, + {0x4317, 0x00}, + {0x4503, 0x08}, + {0x4601, 0x80}, + {0x4800, 0x44}, + {0x4816, 0x53}, + {0x481b, 0x58}, + {0x481f, 0x27}, + {0x4837, 0x16}, + {0x483c, 0x0f}, + {0x484b, 0x05}, + {0x5000, 0x57}, + {0x5001, 0x0a}, + {0x5004, 0x04}, + {0x502e, 0x03}, + {0x5030, 0x41}, + {0x5780, 0x14}, + {0x5781, 0x0f}, + {0x5782, 0x44}, + {0x5783, 0x02}, + {0x5784, 0x01}, + {0x5785, 0x01}, + {0x5786, 0x00}, + {0x5787, 0x04}, + {0x5788, 0x02}, + {0x5789, 0x0f}, + {0x578a, 0xfd}, + {0x578b, 0xf5}, + {0x578c, 0xf5}, + {0x578d, 0x03}, + {0x578e, 0x08}, + {0x578f, 0x0c}, + {0x5790, 0x08}, + {0x5791, 0x04}, + {0x5792, 0x00}, + {0x5793, 0x52}, + {0x5794, 0xa3}, + {0x5795, 0x00}, + {0x5796, 0x10}, + {0x5797, 0x10}, + {0x5798, 0x73}, + {0x5799, 0x73}, + {0x579a, 0x00}, + {0x579b, 0x28}, + {0x579c, 0x00}, + {0x579d, 0x16}, + {0x579e, 0x06}, + {0x579f, 0x20}, + {0x57a0, 0x04}, + {0x57a1, 0xa0}, + {0x59f8, 0x3d}, + {0x5a08, 0x02}, + {0x5b00, 0x02}, + {0x5b01, 0x10}, + {0x5b02, 0x03}, + {0x5b03, 0xcf}, + {0x5b05, 0x6c}, + {0x5e00, 0x00} +}; + +static const char * const ov8856_test_pattern_menu[] = { + "Disabled", + "Standard Color Bar", + "Top-Bottom Darker Color Bar", + "Right-Left Darker Color Bar", + "Bottom-Top Darker Color Bar" +}; + +static const s64 link_freq_menu_items[] = { + OV8856_LINK_FREQ_360MHZ, + OV8856_LINK_FREQ_180MHZ +}; + +static const struct ov8856_link_freq_config link_freq_configs[] = { + [OV8856_LINK_FREQ_720MBPS] = { + .reg_list = { + .num_of_regs = ARRAY_SIZE(mipi_data_rate_720mbps), + .regs = mipi_data_rate_720mbps, + } + }, + [OV8856_LINK_FREQ_360MBPS] = { + .reg_list = { + .num_of_regs = ARRAY_SIZE(mipi_data_rate_360mbps), + .regs = mipi_data_rate_360mbps, + } + } +}; + +static const struct ov8856_mode supported_modes[] = { + { + .width = 3280, + .height = 2464, + .hts = 1928, + .vts_def = 2488, + .vts_min = 2488, + .reg_list = { + .num_of_regs = ARRAY_SIZE(mode_3280x2464_regs), + .regs = mode_3280x2464_regs, + }, + .link_freq_index = OV8856_LINK_FREQ_720MBPS, + }, + { + .width = 1640, + .height = 1232, + .hts = 3820, + .vts_def = 1256, + .vts_min = 1256, + .reg_list = { + .num_of_regs = ARRAY_SIZE(mode_1640x1232_regs), + .regs = mode_1640x1232_regs, + }, + .link_freq_index = OV8856_LINK_FREQ_360MBPS, + } +}; + +struct ov8856 { + struct v4l2_subdev sd; + struct media_pad pad; + struct v4l2_ctrl_handler ctrl_handler; + + /* V4L2 Controls */ + struct v4l2_ctrl *link_freq; + struct v4l2_ctrl *pixel_rate; + struct v4l2_ctrl *vblank; + struct v4l2_ctrl *hblank; + struct v4l2_ctrl *exposure; + + /* Current mode */ + const struct ov8856_mode *cur_mode; + + /* To serialize asynchronus callbacks */ + struct mutex mutex; + + /* Streaming on/off */ + bool streaming; +}; + +static u64 to_pixel_rate(u32 f_index) +{ + u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV8856_DATA_LANES; + + do_div(pixel_rate, OV8856_RGB_DEPTH); + + return pixel_rate; +} + +static u64 to_pixels_per_line(u32 hts, u32 f_index) +{ + u64 ppl = hts * to_pixel_rate(f_index); + + do_div(ppl, OV8856_SCLK); + + return ppl; +} + +static int ov8856_read_reg(struct ov8856 *ov8856, u16 reg, u16 len, u32 *val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); + struct i2c_msg msgs[2]; + u8 *data_be_p; + __be32 data_be = 0; + __be16 reg_addr_be = cpu_to_be16(reg); + int ret; + + if (len > 4) + return -EINVAL; + + data_be_p = (u8 *)&data_be; + msgs[0].addr = client->addr; + msgs[0].flags = 0; + msgs[0].len = 2; + msgs[0].buf = (u8 *)®_addr_be; + msgs[1].addr = client->addr; + msgs[1].flags = I2C_M_RD; + msgs[1].len = len; + msgs[1].buf = &data_be_p[4 - len]; + + ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); + if (ret != ARRAY_SIZE(msgs)) + return -EIO; + + *val = be32_to_cpu(data_be); + + return 0; +} + +static int ov8856_write_reg(struct ov8856 *ov8856, u16 reg, u16 len, u32 __val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); + unsigned int buf_i, val_i; + u8 buf[6]; + u8 *val_p; + __be32 val; + + if (len > 4) + return -EINVAL; + + buf[0] = reg >> 8; + buf[1] = reg & 0xff; + + val = cpu_to_be32(__val); + val_p = (u8 *)&val; + buf_i = 2; + val_i = 4 - len; + + while (val_i < 4) + buf[buf_i++] = val_p[val_i++]; + + if (i2c_master_send(client, buf, len + 2) != len + 2) + return -EIO; + + return 0; +} + +static int ov8856_write_reg_list(struct ov8856 *ov8856, + const struct ov8856_reg_list *r_list) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); + unsigned int i; + int ret; + + for (i = 0; i < r_list->num_of_regs; i++) { + ret = ov8856_write_reg(ov8856, r_list->regs[i].address, 1, + r_list->regs[i].val); + if (ret) { + dev_err_ratelimited(&client->dev, + "failed to write reg 0x%4.4x. error = %d", + r_list->regs[i].address, ret); + return ret; + } + } + + return 0; +} + +static int ov8856_update_digital_gain(struct ov8856 *ov8856, u32 d_gain) +{ + int ret; + + ret = ov8856_write_reg(ov8856, OV8856_REG_MWB_R_GAIN, + OV8856_REG_VALUE_16BIT, d_gain); + if (ret) + return ret; + + ret = ov8856_write_reg(ov8856, OV8856_REG_MWB_G_GAIN, + OV8856_REG_VALUE_16BIT, d_gain); + if (ret) + return ret; + + return ov8856_write_reg(ov8856, OV8856_REG_MWB_B_GAIN, + OV8856_REG_VALUE_16BIT, d_gain); +} + +static int ov8856_test_pattern(struct ov8856 *ov8856, u32 pattern) +{ + if (pattern) + pattern = (pattern - 1) << OV8856_TEST_PATTERN_BAR_SHIFT | + OV8856_TEST_PATTERN_ENABLE; + + return ov8856_write_reg(ov8856, OV8856_REG_TEST_PATTERN, + OV8856_REG_VALUE_08BIT, pattern); +} + +static int ov8856_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct ov8856 *ov8856 = container_of(ctrl->handler, + struct ov8856, ctrl_handler); + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); + s64 exposure_max; + int ret = 0; + + /* Propagate change of current control to all related controls */ + if (ctrl->id == V4L2_CID_VBLANK) { + /* Update max exposure while meeting expected vblanking */ + exposure_max = ov8856->cur_mode->height + ctrl->val - + OV8856_EXPOSURE_MAX_MARGIN; + __v4l2_ctrl_modify_range(ov8856->exposure, + ov8856->exposure->minimum, + exposure_max, ov8856->exposure->step, + exposure_max); + } + + /* V4L2 controls values will be applied only when power is already up */ + if (!pm_runtime_get_if_in_use(&client->dev)) + return 0; + + switch (ctrl->id) { + case V4L2_CID_ANALOGUE_GAIN: + ret = ov8856_write_reg(ov8856, OV8856_REG_ANALOG_GAIN, + OV8856_REG_VALUE_16BIT, ctrl->val); + break; + + case V4L2_CID_DIGITAL_GAIN: + ret = ov8856_update_digital_gain(ov8856, ctrl->val); + break; + + case V4L2_CID_EXPOSURE: + /* 4 least significant bits of expsoure are fractional part */ + ret = ov8856_write_reg(ov8856, OV8856_REG_EXPOSURE, + OV8856_REG_VALUE_24BIT, ctrl->val << 4); + break; + + case V4L2_CID_VBLANK: + ret = ov8856_write_reg(ov8856, OV8856_REG_VTS, + OV8856_REG_VALUE_16BIT, + ov8856->cur_mode->height + ctrl->val); + break; + + case V4L2_CID_TEST_PATTERN: + ret = ov8856_test_pattern(ov8856, ctrl->val); + break; + + default: + dev_info(&client->dev, "unhandled id:0x%x, val:0x%x", + ctrl->id, ctrl->val); + break; + } + + pm_runtime_put(&client->dev); + + return ret; +} + +static const struct v4l2_ctrl_ops ov8856_ctrl_ops = { + .s_ctrl = ov8856_set_ctrl, +}; + +static int ov8856_init_controls(struct ov8856 *ov8856) +{ + struct v4l2_ctrl_handler *ctrl_hdlr; + s64 exposure_max, h_blank; + int ret; + + ctrl_hdlr = &ov8856->ctrl_handler; + ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8); + if (ret) + return ret; + + ctrl_hdlr->lock = &ov8856->mutex; + ov8856->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov8856_ctrl_ops, + V4L2_CID_LINK_FREQ, + ARRAY_SIZE(link_freq_menu_items) - 1, + 0, link_freq_menu_items); + if (ov8856->link_freq) + ov8856->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + ov8856->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, + V4L2_CID_PIXEL_RATE, 0, + to_pixel_rate(OV8856_LINK_FREQ_720MBPS), + 1, + to_pixel_rate(OV8856_LINK_FREQ_720MBPS)); + ov8856->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, + V4L2_CID_VBLANK, + ov8856->cur_mode->vts_min - ov8856->cur_mode->height, + OV8856_VTS_MAX - ov8856->cur_mode->height, 1, + ov8856->cur_mode->vts_def - ov8856->cur_mode->height); + h_blank = to_pixels_per_line(ov8856->cur_mode->hts, + ov8856->cur_mode->link_freq_index) - ov8856->cur_mode->width; + ov8856->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, + V4L2_CID_HBLANK, h_blank, h_blank, 1, + h_blank); + if (ov8856->hblank) + ov8856->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, + OV8856_ANAL_GAIN_MIN, OV8856_ANAL_GAIN_MAX, + OV8856_ANAL_GAIN_STEP, OV8856_ANAL_GAIN_MIN); + v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_DIGITAL_GAIN, + OV8856_DGTL_GAIN_MIN, OV8856_DGTL_GAIN_MAX, + OV8856_DGTL_GAIN_STEP, OV8856_DGTL_GAIN_DEFAULT); + exposure_max = ov8856->cur_mode->vts_def - OV8856_EXPOSURE_MAX_MARGIN; + ov8856->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, + V4L2_CID_EXPOSURE, + OV8856_EXPOSURE_MIN, exposure_max, + OV8856_EXPOSURE_STEP, + exposure_max); + v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov8856_ctrl_ops, + V4L2_CID_TEST_PATTERN, + ARRAY_SIZE(ov8856_test_pattern_menu) - 1, + 0, 0, ov8856_test_pattern_menu); + if (ctrl_hdlr->error) + return ctrl_hdlr->error; + + ov8856->sd.ctrl_handler = ctrl_hdlr; + + return 0; +} + +static void ov8856_update_pad_format(const struct ov8856_mode *mode, + struct v4l2_mbus_framefmt *fmt) +{ + fmt->width = mode->width; + fmt->height = mode->height; + fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; + fmt->field = V4L2_FIELD_NONE; +} + +static int ov8856_start_streaming(struct ov8856 *ov8856) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); + const struct ov8856_reg_list *reg_list; + int link_freq_index, ret; + + link_freq_index = ov8856->cur_mode->link_freq_index; + reg_list = &link_freq_configs[link_freq_index].reg_list; + ret = ov8856_write_reg_list(ov8856, reg_list); + if (ret) { + dev_err(&client->dev, "failed to set plls"); + return ret; + } + + reg_list = &ov8856->cur_mode->reg_list; + ret = ov8856_write_reg_list(ov8856, reg_list); + if (ret) { + dev_err(&client->dev, "failed to set mode"); + return ret; + } + + ret = __v4l2_ctrl_handler_setup(ov8856->sd.ctrl_handler); + if (ret) + return ret; + + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, + OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING); + if (ret) { + dev_err(&client->dev, "failed to set stream"); + return ret; + } + + return 0; +} + +static void ov8856_stop_streaming(struct ov8856 *ov8856) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); + + if (ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, + OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY)) + dev_err(&client->dev, "failed to set stream"); +} + +static int ov8856_set_stream(struct v4l2_subdev *sd, int enable) +{ + struct ov8856 *ov8856 = to_ov8856(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + int ret = 0; + + if (ov8856->streaming == enable) + return 0; + + mutex_lock(&ov8856->mutex); + if (enable) { + ret = pm_runtime_get_sync(&client->dev); + if (ret < 0) { + pm_runtime_put_noidle(&client->dev); + mutex_unlock(&ov8856->mutex); + return ret; + } + + ret = ov8856_start_streaming(ov8856); + if (ret) { + enable = 0; + ov8856_stop_streaming(ov8856); + pm_runtime_put(&client->dev); + } + } else { + ov8856_stop_streaming(ov8856); + pm_runtime_put(&client->dev); + } + + ov8856->streaming = enable; + mutex_unlock(&ov8856->mutex); + + return ret; +} + +static int __maybe_unused ov8856_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov8856 *ov8856 = to_ov8856(sd); + + mutex_lock(&ov8856->mutex); + if (ov8856->streaming) + ov8856_stop_streaming(ov8856); + + mutex_unlock(&ov8856->mutex); + + return 0; +} + +static int __maybe_unused ov8856_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov8856 *ov8856 = to_ov8856(sd); + int ret; + + mutex_lock(&ov8856->mutex); + if (ov8856->streaming) { + ret = ov8856_start_streaming(ov8856); + if (ret) { + ov8856->streaming = false; + ov8856_stop_streaming(ov8856); + mutex_unlock(&ov8856->mutex); + return ret; + } + } + + mutex_unlock(&ov8856->mutex); + + return 0; +} + +static int ov8856_set_format(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct ov8856 *ov8856 = to_ov8856(sd); + const struct ov8856_mode *mode; + s32 vblank_def, h_blank; + + mode = v4l2_find_nearest_size(supported_modes, + ARRAY_SIZE(supported_modes), width, + height, fmt->format.width, + fmt->format.height); + + mutex_lock(&ov8856->mutex); + ov8856_update_pad_format(mode, &fmt->format); + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { + *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format; + } else { + ov8856->cur_mode = mode; + __v4l2_ctrl_s_ctrl(ov8856->link_freq, mode->link_freq_index); + __v4l2_ctrl_s_ctrl_int64(ov8856->pixel_rate, + to_pixel_rate(mode->link_freq_index)); + + /* Update limits and set FPS to default */ + vblank_def = mode->vts_def - mode->height; + __v4l2_ctrl_modify_range(ov8856->vblank, + mode->vts_min - mode->height, + OV8856_VTS_MAX - mode->height, 1, + vblank_def); + __v4l2_ctrl_s_ctrl(ov8856->vblank, vblank_def); + h_blank = to_pixels_per_line(mode->hts, mode->link_freq_index) - + mode->width; + __v4l2_ctrl_modify_range(ov8856->hblank, h_blank, h_blank, 1, + h_blank); + } + + mutex_unlock(&ov8856->mutex); + + return 0; +} + +static int ov8856_get_format(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct ov8856 *ov8856 = to_ov8856(sd); + + mutex_lock(&ov8856->mutex); + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) + fmt->format = *v4l2_subdev_get_try_format(&ov8856->sd, cfg, + fmt->pad); + else + ov8856_update_pad_format(ov8856->cur_mode, &fmt->format); + + mutex_unlock(&ov8856->mutex); + + return 0; +} + +static int ov8856_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + /* Only one bayer order GRBG is supported */ + if (code->index > 0) + return -EINVAL; + + code->code = MEDIA_BUS_FMT_SGRBG10_1X10; + + return 0; +} + +static int ov8856_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_size_enum *fse) +{ + if (fse->index >= ARRAY_SIZE(supported_modes)) + return -EINVAL; + + if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10) + return -EINVAL; + + fse->min_width = supported_modes[fse->index].width; + fse->max_width = fse->min_width; + fse->min_height = supported_modes[fse->index].height; + fse->max_height = fse->min_height; + + return 0; +} + +static int ov8856_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct ov8856 *ov8856 = to_ov8856(sd); + + mutex_lock(&ov8856->mutex); + ov8856_update_pad_format(&supported_modes[0], + v4l2_subdev_get_try_format(sd, fh->pad, 0)); + mutex_unlock(&ov8856->mutex); + + return 0; +} + +static const struct v4l2_subdev_video_ops ov8856_video_ops = { + .s_stream = ov8856_set_stream, +}; + +static const struct v4l2_subdev_pad_ops ov8856_pad_ops = { + .set_fmt = ov8856_set_format, + .get_fmt = ov8856_get_format, + .enum_mbus_code = ov8856_enum_mbus_code, + .enum_frame_size = ov8856_enum_frame_size, +}; + +static const struct v4l2_subdev_ops ov8856_subdev_ops = { + .video = &ov8856_video_ops, + .pad = &ov8856_pad_ops, +}; + +static const struct media_entity_operations ov8856_subdev_entity_ops = { + .link_validate = v4l2_subdev_link_validate, +}; + +static const struct v4l2_subdev_internal_ops ov8856_internal_ops = { + .open = ov8856_open, +}; + +static int ov8856_identify_module(struct ov8856 *ov8856) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd); + int ret; + u32 val; + + ret = ov8856_read_reg(ov8856, OV8856_REG_CHIP_ID, + OV8856_REG_VALUE_24BIT, &val); + if (ret) + return ret; + + if (val != OV8856_CHIP_ID) { + dev_err(&client->dev, "chip id mismatch: %x!=%x", + OV8856_CHIP_ID, val); + return -ENXIO; + } + + return 0; +} + +static int ov8856_check_hwcfg(struct device *dev) +{ + struct fwnode_handle *ep; + struct fwnode_handle *fwnode = dev_fwnode(dev); + struct v4l2_fwnode_endpoint bus_cfg = { + .bus_type = V4L2_MBUS_CSI2_DPHY + }; + u32 mclk; + int ret; + unsigned int i, j; + + if (!fwnode) + return -ENXIO; + + fwnode_property_read_u32(fwnode, "clock-frequency", &mclk); + if (mclk != OV8856_MCLK) { + dev_err(dev, "external clock %d is not supported", mclk); + return -EINVAL; + } + + ep = fwnode_graph_get_next_endpoint(fwnode, NULL); + if (!ep) + return -ENXIO; + + ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); + fwnode_handle_put(ep); + if (ret) + return ret; + + if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV8856_DATA_LANES) { + dev_err(dev, "number of CSI2 data lanes %d is not supported", + bus_cfg.bus.mipi_csi2.num_data_lanes); + ret = -EINVAL; + goto check_hwcfg_error; + } + + if (!bus_cfg.nr_of_link_frequencies) { + dev_err(dev, "no link frequencies defined"); + ret = -EINVAL; + goto check_hwcfg_error; + } + + for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) { + for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) { + if (link_freq_menu_items[i] == + bus_cfg.link_frequencies[j]) + break; + } + + if (j == bus_cfg.nr_of_link_frequencies) { + dev_err(dev, "no link frequency %lld supported", + link_freq_menu_items[i]); + ret = -EINVAL; + goto check_hwcfg_error; + } + } + +check_hwcfg_error: + v4l2_fwnode_endpoint_free(&bus_cfg); + + return ret; +} + +static int ov8856_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov8856 *ov8856 = to_ov8856(sd); + + v4l2_async_unregister_subdev(sd); + media_entity_cleanup(&sd->entity); + v4l2_ctrl_handler_free(sd->ctrl_handler); + pm_runtime_disable(&client->dev); + mutex_destroy(&ov8856->mutex); + + return 0; +} + +static int ov8856_probe(struct i2c_client *client) +{ + struct ov8856 *ov8856; + int ret; + + ret = ov8856_check_hwcfg(&client->dev); + if (ret) { + dev_err(&client->dev, "failed to check HW configuration: %d", + ret); + return ret; + } + + ov8856 = devm_kzalloc(&client->dev, sizeof(*ov8856), GFP_KERNEL); + if (!ov8856) + return -ENOMEM; + + v4l2_i2c_subdev_init(&ov8856->sd, client, &ov8856_subdev_ops); + ret = ov8856_identify_module(ov8856); + if (ret) { + dev_err(&client->dev, "failed to find sensor: %d", ret); + return ret; + } + + mutex_init(&ov8856->mutex); + ov8856->cur_mode = &supported_modes[0]; + ret = ov8856_init_controls(ov8856); + if (ret) { + dev_err(&client->dev, "failed to init controls: %d", ret); + goto probe_error_v4l2_ctrl_handler_free; + } + + ov8856->sd.internal_ops = &ov8856_internal_ops; + ov8856->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + ov8856->sd.entity.ops = &ov8856_subdev_entity_ops; + ov8856->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; + ov8856->pad.flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_pads_init(&ov8856->sd.entity, 1, &ov8856->pad); + if (ret) { + dev_err(&client->dev, "failed to init entity pads: %d", ret); + goto probe_error_v4l2_ctrl_handler_free; + } + + ret = v4l2_async_register_subdev_sensor_common(&ov8856->sd); + if (ret < 0) { + dev_err(&client->dev, "failed to register V4L2 subdev: %d", + ret); + goto probe_error_media_entity_cleanup; + } + + /* + * Device is already turned on by i2c-core with ACPI domain PM. + * Enable runtime PM and turn off the device. + */ + pm_runtime_set_active(&client->dev); + pm_runtime_enable(&client->dev); + pm_runtime_idle(&client->dev); + + return 0; + +probe_error_media_entity_cleanup: + media_entity_cleanup(&ov8856->sd.entity); + +probe_error_v4l2_ctrl_handler_free: + v4l2_ctrl_handler_free(ov8856->sd.ctrl_handler); + mutex_destroy(&ov8856->mutex); + + return ret; +} + +static const struct dev_pm_ops ov8856_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(ov8856_suspend, ov8856_resume) +}; + +#ifdef CONFIG_ACPI +static const struct acpi_device_id ov8856_acpi_ids[] = { + {"OVTI8856"}, + {} +}; + +MODULE_DEVICE_TABLE(acpi, ov8856_acpi_ids); +#endif + +static struct i2c_driver ov8856_i2c_driver = { + .driver = { + .name = "ov8856", + .pm = &ov8856_pm_ops, + .acpi_match_table = ACPI_PTR(ov8856_acpi_ids), + }, + .probe_new = ov8856_probe, + .remove = ov8856_remove, +}; + +module_i2c_driver(ov8856_i2c_driver); + +MODULE_AUTHOR("Ben Kao <ben.kao@intel.com>"); +MODULE_DESCRIPTION("OmniVision OV8856 sensor driver"); +MODULE_LICENSE("GPL v2");
This patch adds driver for Omnivision's ov8856 sensor, the driver supports following features: - manual exposure/gain(analog and digital) control support - two link frequencies - VBLANK/HBLANK support - test pattern support - media controller support - runtime PM support - enable Vsync signal output - supported resolutions + 3280x2464 at 30FPS + 1640x1232 at 30FPS Signed-off-by: Ben Kao <ben.kao@intel.com> --- since v2: --Add MAINTAINERS entry for ov8856 driver. --Modify the type of variables buf_i/var_i to "unsigned int" in ov8856_write_reg(). --Add link_validate function. --Remove "ifdef CONFIG_ACPI" in ov8856_i2c_driver{}. --Move ov8856_check_hwcfg() to the top of ov8856_probe(). --Remove unnecessary blank lines. --Remove unnecessary V4L2_SUBDEV_FL_HAS_EVENTS flag. --Enable Vsync signal output. --- MAINTAINERS | 7 + drivers/media/i2c/Kconfig | 12 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/ov8856.c | 1285 ++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 1305 insertions(+) create mode 100644 drivers/media/i2c/ov8856.c