From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dongchun Zhu Subject: Re: [V3, 2/2] media: i2c: Add Omnivision OV02A10 camera sensor driver Date: Thu, 5 Sep 2019 17:41:05 +0800 Message-ID: <1567676465.21623.100.camel@mhfsdcap03> References: <20190819034331.13098-1-dongchun.zhu@mediatek.com> <20190819034331.13098-3-dongchun.zhu@mediatek.com> <20190819083009.GC6133@paasikivi.fi.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20190819083009.GC6133@paasikivi.fi.intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Sakari Ailus Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, drinkcat@chromium.org, srv_heupstream@mediatek.com, shengnan.wang@mediatek.com, tfiga@chromium.org, louis.kuo@mediatek.com, sj.huang@mediatek.com, robh+dt@kernel.org, linux-mediatek@lists.infradead.org, matthias.bgg@gmail.com, bingbu.cao@intel.com, mchehab@kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org List-Id: devicetree@vger.kernel.org Hi Sakari, On Mon, 2019-08-19 at 11:30 +0300, Sakari Ailus wrote: > Hi Dongchun, > > Thanks for the update. > > On Mon, Aug 19, 2019 at 11:43:31AM +0800, dongchun.zhu@mediatek.com wrote: > > From: Dongchun Zhu > > > > This patch adds a V4L2 sub-device driver for OV02A10 image sensor. > > The OV02A10 is a 1/5" CMOS sensor from Omnivision, > > which supports output format: 10-bit Raw. > > The OV02A10 has a single MIPI lane interface and use the I2C bus > > for control and the CSI-2 bus for data. > > > > Signed-off-by: Dongchun Zhu > > --- > > MAINTAINERS | 1 + > > drivers/media/i2c/Kconfig | 11 + > > drivers/media/i2c/Makefile | 1 + > > drivers/media/i2c/ov02a10.c | 1018 +++++++++++++++++++++++++++++++++++++++++++ > > 4 files changed, 1031 insertions(+) > > create mode 100644 drivers/media/i2c/ov02a10.c > > > > diff --git a/MAINTAINERS b/MAINTAINERS > > index 41734fb..4b714a2 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -11821,6 +11821,7 @@ M: Dongchun Zhu > > L: linux-media@vger.kernel.org > > T: git git://linuxtv.org/media_tree.git > > S: Maintained > > +F: drivers/media/i2c/ov02a10.c > > F: Documentation/devicetree/bindings/media/i2c/ov02a10.txt > > > > OMNIVISION OV2680 SENSOR DRIVER > > diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig > > index 79ce9ec..d063a82 100644 > > --- a/drivers/media/i2c/Kconfig > > +++ b/drivers/media/i2c/Kconfig > > @@ -617,6 +617,17 @@ config VIDEO_IMX355 > > To compile this driver as a module, choose M here: the > > module will be called imx355. > > > > +config VIDEO_OV02A10 > > + tristate "OmniVision OV02A10 sensor support" > > + depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API > > + depends on MEDIA_CAMERA_SUPPORT > > + help > > + This is a Video4Linux2 sensor driver for the OmniVision > > + OV02A10 camera. > > + > > + To compile this driver as a module, choose M here: the > > + module will be called ov02a10. > > + > > 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 fd4ea86..f34a7ac 100644 > > --- a/drivers/media/i2c/Makefile > > +++ b/drivers/media/i2c/Makefile > > @@ -71,6 +71,7 @@ obj-$(CONFIG_VIDEO_OV5645) += ov5645.o > > obj-$(CONFIG_VIDEO_OV5647) += ov5647.o > > obj-$(CONFIG_VIDEO_OV5670) += ov5670.o > > obj-$(CONFIG_VIDEO_OV5695) += ov5695.o > > +obj-$(CONFIG_VIDEO_OV02A10) += ov02a10.o > > obj-$(CONFIG_VIDEO_OV6650) += ov6650.o > > obj-$(CONFIG_VIDEO_OV7251) += ov7251.o > > obj-$(CONFIG_VIDEO_OV7640) += ov7640.o > > diff --git a/drivers/media/i2c/ov02a10.c b/drivers/media/i2c/ov02a10.c > > new file mode 100644 > > index 0000000..ff5460a > > --- /dev/null > > +++ b/drivers/media/i2c/ov02a10.c > > @@ -0,0 +1,1018 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * Copyright (c) 2018 MediaTek Inc. > > + */ > > + > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > + > > +#define CHIP_ID 0x2509 > > +#define OV02A10_REG_CHIP_ID_H 0x02 > > +#define OV02A10_REG_CHIP_ID_L 0x03 > > +#define OV02A10_ID(_msb, _lsb) ((_msb) << 8 | (_lsb)) > > + > > +/* Bit[1] vertical upside down */ > > +/* Bit[0] horizontal mirror */ > > +#define REG_MIRROR_FLIP_CONTROL 0x3f > > + > > +/* Orientation */ > > +#define REG_CONFIG_MIRROR_FLIP 0x03 > > + > > +#define REG_PAGE_SWITCH 0xfd > > +#define REG_GLOBAL_EFFECTIVE 0x01 > > +#define REG_ENABLE BIT(0) > > + > > +#define REG_SC_CTRL_MODE 0xac > > +#define SC_CTRL_MODE_STANDBY 0x00 > > +#define SC_CTRL_MODE_STREAMING 0x01 > > + > > +#define OV02A10_REG_EXPOSURE_H 0x03 > > +#define OV02A10_REG_EXPOSURE_L 0x04 > > +#define OV02A10_EXPOSURE_MIN 4 > > +#define OV02A10_EXPOSURE_STEP 1 > > + > > +#define OV02A10_REG_VTS_H 0x05 > > +#define OV02A10_REG_VTS_L 0x06 > > +#define OV02A10_VTS_MAX 0x209f > > +#define OV02A10_VTS_MIN 0x04cf > > +#define OV02A10_BASIC_LINE 1224 > > + > > +#define OV02A10_REG_GAIN 0x24 > > +#define OV02A10_GAIN_MIN 0x10 > > +#define OV02A10_GAIN_MAX 0xf8 > > +#define OV02A10_GAIN_STEP 0x01 > > +#define OV02A10_GAIN_DEFAULT 0x40 > > + > > +#define REG_NULL 0xff > > + > > +#define OV02A10_LANES 1 > > +#define OV02A10_BITS_PER_SAMPLE 10 > > + > > +static const char * const ov02a10_supply_names[] = { > > + "dovdd", /* Digital I/O power */ > > + "avdd", /* Analog power */ > > + "dvdd", /* Digital core power */ > > +}; > > + > > +#define OV02A10_NUM_SUPPLIES ARRAY_SIZE(ov02a10_supply_names) > > + > > +struct regval { > > + u16 addr; > > + u8 val; > > +}; > > + > > +struct ov02a10_mode { > > + u32 width; > > + u32 height; > > + u32 exp_def; > > + u32 hts_def; > > + u32 vts_def; > > + const struct regval *reg_list; > > +}; > > + > > +struct ov02a10 { > > + struct clk *xvclk; > > + struct gpio_desc *powerdown_gpio; > > + struct gpio_desc *reset_gpio; > > + struct regulator_bulk_data supplies[OV02A10_NUM_SUPPLIES]; > > + > > + bool streaming; > > + bool upside_down; > > + > > + /* > > + * Serialize control access, get/set format, get selection > > + * and start streaming. > > + */ > > + struct mutex mutex; > > + struct v4l2_subdev subdev; > > + struct media_pad pad; > > + struct v4l2_ctrl *anal_gain; > > + struct v4l2_ctrl *exposure; > > + struct v4l2_ctrl *hblank; > > + struct v4l2_ctrl *vblank; > > + struct v4l2_ctrl *hflip; > > + struct v4l2_ctrl *vflip; > > + struct v4l2_ctrl *test_pattern; > > + struct v4l2_mbus_framefmt fmt; > > + struct v4l2_ctrl_handler ctrl_handler; > > + > > + const struct ov02a10_mode *cur_mode; > > +}; > > + > > +#define to_ov02a10(sd) container_of(sd, struct ov02a10, subdev) > > + > > +static inline void msleep_range(unsigned int delay_base) > > +{ > > + usleep_range(delay_base * 1000, delay_base * 1000 + 500); > > +} > > + > > +/* MIPI color bar enable output */ > > +static const struct regval ov02a10_test_pattern_enable_regs[] = { > > + {0xfd, 0x01}, > > + {0x0d, 0x00}, > > + {0xb6, 0x01}, > > + {0x01, 0x01}, > > + {0xfd, 0x01}, > > + {0xac, 0x01}, > > + {REG_NULL, 0x00} > > +}; > > + > > +/* MIPI color bar disable output */ > > +static const struct regval ov02a10_test_pattern_disable_regs[] = { > > + {0xfd, 0x01}, > > + {0x0d, 0x00}, > > + {0xb6, 0x00}, > > + {0x01, 0x01}, > > + {0xfd, 0x01}, > > + {0xac, 0x01}, > > + {REG_NULL, 0x00} > > +}; > > + > > +/* > > + * xvclk 24Mhz > > + * pclk 39Mhz > > + * linelength 934(0x3a6) > > + * framelength 1390(0x56e) > > + * grabwindow_width 1600 > > + * grabwindow_height 1200 > > + * max_framerate 30fps > > + * mipi_datarate per lane 780Mbps > > + */ > > +static const struct regval ov02a10_1600x1200_regs[] = { > > + {0xfd, 0x01}, > > + {0xac, 0x00}, > > + {0xfd, 0x00}, > > + {0x2f, 0x29}, > > + {0x34, 0x00}, > > + {0x35, 0x21}, > > + {0x30, 0x15}, > > + {0x33, 0x01}, > > + {0xfd, 0x01}, > > + {0x44, 0x00}, > > + {0x2a, 0x4c}, > > + {0x2b, 0x1e}, > > + {0x2c, 0x60}, > > + {0x25, 0x11}, > > + {0x03, 0x01}, > > + {0x04, 0xae}, > > + {0x09, 0x00}, > > + {0x0a, 0x02}, > > + {0x06, 0xa6}, > > + {0x31, 0x00}, > > + {0x24, 0x40}, > > + {0x01, 0x01}, > > + {0xfb, 0x73}, > > + {0xfd, 0x01}, > > + {0x16, 0x04}, > > + {0x1c, 0x09}, > > + {0x21, 0x42}, > > + {0x12, 0x04}, > > + {0x13, 0x10}, > > + {0x11, 0x40}, > > + {0x33, 0x81}, > > + {0xd0, 0x00}, > > + {0xd1, 0x01}, > > + {0xd2, 0x00}, > > + {0x50, 0x10}, > > + {0x51, 0x23}, > > + {0x52, 0x20}, > > + {0x53, 0x10}, > > + {0x54, 0x02}, > > + {0x55, 0x20}, > > + {0x56, 0x02}, > > + {0x58, 0x48}, > > + {0x5d, 0x15}, > > + {0x5e, 0x05}, > > + {0x66, 0x66}, > > + {0x68, 0x68}, > > + {0x6b, 0x00}, > > + {0x6c, 0x00}, > > + {0x6f, 0x40}, > > + {0x70, 0x40}, > > + {0x71, 0x0a}, > > + {0x72, 0xf0}, > > + {0x73, 0x10}, > > + {0x75, 0x80}, > > + {0x76, 0x10}, > > + {0x84, 0x00}, > > + {0x85, 0x10}, > > + {0x86, 0x10}, > > + {0x87, 0x00}, > > + {0x8a, 0x22}, > > + {0x8b, 0x22}, > > + {0x19, 0xf1}, > > + {0x29, 0x01}, > > + {0xfd, 0x01}, > > + {0x9d, 0xd6}, > > + {0xa0, 0x29}, > > + {0xa1, 0x03}, > > + {0xad, 0x62}, > > + {0xae, 0x00}, > > + {0xaf, 0x85}, > > + {0xb1, 0x01}, > > + {0x8e, 0x06}, > > + {0x8f, 0x40}, > > + {0x90, 0x04}, > > + {0x91, 0xb0}, > > + {0x45, 0x01}, > > + {0x46, 0x00}, > > + {0x47, 0x6c}, > > + {0x48, 0x03}, > > + {0x49, 0x8b}, > > + {0x4a, 0x00}, > > + {0x4b, 0x07}, > > + {0x4c, 0x04}, > > + {0x4d, 0xb7}, > > + {0xf0, 0x40}, > > + {0xf1, 0x40}, > > + {0xf2, 0x40}, > > + {0xf3, 0x40}, > > + {0x3f, 0x00}, > > + {0xfd, 0x01}, > > + {0x05, 0x00}, > > + {0x06, 0xa6}, > > + {0xfd, 0x01}, > > + {REG_NULL, 0x00} > > +}; > > + > > +#define OV02A10_LINK_FREQ_390MHZ 390000000 > > +static const s64 link_freq_menu_items[] = { > > + OV02A10_LINK_FREQ_390MHZ > > +}; > > + > > +static const char * const ov02a10_test_pattern_menu[] = { > > + "Disabled", > > + "Color Bar", > > +}; > > + > > +static const struct ov02a10_mode supported_modes[] = { > > + { > > + .width = 1600, > > + .height = 1200, > > + .exp_def = 0x01ae, > > + .hts_def = 0x03a6, > > + .vts_def = 0x056e, > > + .reg_list = ov02a10_1600x1200_regs, > > + }, > > +}; > > + > > +/* Write a register */ > > +static int ov02a10_write_reg(struct ov02a10 *ov02a10, u8 addr, u8 val) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + u8 buf[2] = {addr, val}; > > + int ret; > > + > > + ret = i2c_master_send(client, buf, 2); > > + > > + if (ret != 2) { > > + dev_err(&client->dev, "%s: error: reg=%x, val=%x\n", > > + __func__, addr, val); > > + return -EIO; > > + } > > + > > + return 0; > > +} > > + > > +static int ov02a10_write_array(struct ov02a10 *ov02a10, > > + const struct regval *regs) > > +{ > > + u32 i; > > unsigned int, please. > Fixed in next release. > > + int ret; > > + > > + for (i = 0; regs[i].addr != REG_NULL; i++) { > > + ret = ov02a10_write_reg(ov02a10, regs[i].addr, regs[i].val); > > + if (ret < 0) > > + return ret; > > + } > > + > > + return 0; > > +} > > + > > +/* Read a register */ > > +static int ov02a10_read_reg(struct ov02a10 *ov02a10, u8 reg, u8 *val) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + u8 data = reg; > > + struct i2c_msg msg = { > > + .addr = client->addr, > > + .flags = 0, > > + .len = 1, > > + .buf = &data, > > + }; > > + int ret; > > + > > + ret = i2c_transfer(client->adapter, &msg, 1); > > + if (ret < 0) > > + goto err_wr; > > + > > + msg.flags = I2C_M_RD; > > + ret = i2c_transfer(client->adapter, &msg, 1); > > + if (ret < 0) > > + goto err_rd; > > + > > + *val = data; > > + return 0; > > + > > +err_rd: > > + dev_err(&client->dev, "i2c_transfer --I2C_M_RD failed\n"); > > +err_wr: > > + dev_err(&client->dev, "read error: reg=0x%02x: %d\n", reg, ret); > > + return ret; > > +} > > + > > +static void ov02a10_fill_fmt(const struct ov02a10_mode *mode, > > + struct v4l2_mbus_framefmt *fmt) > > +{ > > + fmt->width = mode->width; > > + fmt->height = mode->height; > > + fmt->field = V4L2_FIELD_NONE; > > +} > > + > > +static int ov02a10_set_fmt(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_format *fmt) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; > > + > > + mutex_lock(&ov02a10->mutex); > > + > > + if (ov02a10->streaming) { > > + mutex_unlock(&ov02a10->mutex); > > + return -EBUSY; > > + } > > + > > + /* Only one sensor mode supported */ > > + mbus_fmt->code = ov02a10->fmt.code; > > + ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); > > + ov02a10->fmt = fmt->format; > > + > > + mutex_unlock(&ov02a10->mutex); > > + > > + return 0; > > +} > > + > > +static int ov02a10_get_fmt(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_format *fmt) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; > > + > > + mutex_lock(&ov02a10->mutex); > > + > > + fmt->format = ov02a10->fmt; > > + mbus_fmt->code = ov02a10->fmt.code; > > + ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); > > + > > + mutex_unlock(&ov02a10->mutex); > > + > > + return 0; > > +} > > + > > +static int ov02a10_enum_mbus_code(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_mbus_code_enum *code) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + if (code->index >= ARRAY_SIZE(supported_modes) || !(code->index)) > > This doesn't make sense. The supported modes, should more be added in the > future, are presumably using the same mbus code. If you only have one, then > non-zero code->index would result in -EINVAL (and not zero code->index). > Thanks for kind reminder. !(code->index) would be removed in next release. > > + return -EINVAL; > > + > > + code->code = ov02a10->fmt.code; > > + > > + return 0; > > +} > > + > > +static int ov02a10_enum_frame_sizes(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_frame_size_enum *fse) > > +{ > > + if (fse->index >= ARRAY_SIZE(supported_modes) || !(fse->index)) > > + return -EINVAL; > > + > > + fse->min_width = supported_modes[fse->index].width; > > + fse->max_width = supported_modes[fse->index].width; > > + fse->max_height = supported_modes[fse->index].height; > > + fse->min_height = supported_modes[fse->index].height; > > + > > + return 0; > > +} > > + > > +static int __ov02a10_power_on(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + struct device *dev = &client->dev; > > + int ret; > > + > > + ret = clk_prepare_enable(ov02a10->xvclk); > > + if (ret < 0) { > > + dev_err(dev, "Failed to enable xvclk\n"); > > + return ret; > > + } > > + > > + /* Note: set 0 is high, set 1 is low */ > > + gpiod_set_value_cansleep(ov02a10->reset_gpio, 1); > > + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 0); > > + > > + ret = regulator_bulk_enable(OV02A10_NUM_SUPPLIES, ov02a10->supplies); > > + if (ret < 0) { > > + dev_err(dev, "Failed to enable regulators\n"); > > + goto disable_clk; > > + } > > + msleep_range(7); > > This has some potential of clashing with more generic functions in the > future. Please use usleep_range directly, or msleep. > Did you mean using usleep_range(7*1000, 8*1000), as used in patch v1? https://patchwork.kernel.org/patch/10957225/ > > + > > + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 1); > > + msleep_range(10); > > + > > + gpiod_set_value_cansleep(ov02a10->reset_gpio, 0); > > + msleep_range(10); > > + > > + return 0; > > + > > +disable_clk: > > + clk_disable_unprepare(ov02a10->xvclk); > > + > > + return ret; > > +} > > + > > +static void __ov02a10_power_off(struct ov02a10 *ov02a10) > > +{ > > + clk_disable_unprepare(ov02a10->xvclk); > > + gpiod_set_value_cansleep(ov02a10->reset_gpio, 1); > > + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 1); > > + regulator_bulk_disable(OV02A10_NUM_SUPPLIES, ov02a10->supplies); > > +} > > + > > +static int __ov02a10_start_stream(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + int ret; > > + > > + /* Apply default values of current mode */ > > + ret = ov02a10_write_array(ov02a10, ov02a10->cur_mode->reg_list); > > + if (ret) > > + return ret; > > + > > + /* Apply customized values from user */ > > + ret = __v4l2_ctrl_handler_setup(ov02a10->subdev.ctrl_handler); > > + if (ret) > > + return ret; > > + > > + /* Set orientation to 180 degree */ > > + if (ov02a10->upside_down) { > > + ret = ov02a10_write_reg(ov02a10, REG_MIRROR_FLIP_CONTROL, > > + REG_CONFIG_MIRROR_FLIP); > > + if (ret) { > > + dev_err(&client->dev, "%s failed to set orientation\n", > > + __func__); > > + return ret; > > + } > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + } > > + > > + /* Set stream on register */ > > + return ov02a10_write_reg(ov02a10, > > + REG_SC_CTRL_MODE, SC_CTRL_MODE_STREAMING); > > +} > > + > > +static int __ov02a10_stop_stream(struct ov02a10 *ov02a10) > > +{ > > + return ov02a10_write_reg(ov02a10, > > + REG_SC_CTRL_MODE, SC_CTRL_MODE_STANDBY); > > +} > > + > > +static int ov02a10_entity_init_cfg(struct v4l2_subdev *subdev, > > + struct v4l2_subdev_pad_config *cfg) > > +{ > > + struct v4l2_subdev_format fmt = { 0 }; > > + > > + fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; > > + fmt.format.width = 1600; > > + fmt.format.height = 1200; > > + > > + ov02a10_set_fmt(subdev, cfg, &fmt); > > + > > + return 0; > > +} > > + > > +static int ov02a10_s_stream(struct v4l2_subdev *sd, int on) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + int ret = 0; > > + > > + mutex_lock(&ov02a10->mutex); > > + > > + if (ov02a10->streaming == on) > > + goto unlock_and_return; > > + > > + if (on) { > > + ret = pm_runtime_get_sync(&client->dev); > > + if (ret < 0) { > > + pm_runtime_put_noidle(&client->dev); > > + goto unlock_and_return; > > + } > > + > > + ret = __ov02a10_start_stream(ov02a10); > > + if (ret) { > > + __ov02a10_stop_stream(ov02a10); > > + ov02a10->streaming = !on; > > + goto err_rpm_put; > > + } > > + } else { > > + __ov02a10_stop_stream(ov02a10); > > + pm_runtime_put(&client->dev); > > + } > > + > > + ov02a10->streaming = on; > > + mutex_unlock(&ov02a10->mutex); > > + > > + return ret; > > + > > +err_rpm_put: > > + pm_runtime_put(&client->dev); > > +unlock_and_return: > > + mutex_unlock(&ov02a10->mutex); > > + > > + return ret; > > +} > > + > > +static int ov02a10_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct v4l2_mbus_framefmt *try_fmt = v4l2_subdev_get_try_format(sd, > > + fh->pad, > > + 0); > > + > > + mutex_lock(&ov02a10->mutex); > > + /* Initialize try_fmt */ > > + try_fmt->code = ov02a10->fmt.code; > > + ov02a10_fill_fmt(&supported_modes[0], try_fmt); > > + > > + mutex_unlock(&ov02a10->mutex); > > No need for the mutex: the supported values are static and there is no > parallel access to try_fmt. > > Btw. you don't need to do this here as you have init_cfg implemented, i.e. > you can omit the open callback. > Understood. mutex here would be removed in next release. > > + > > + return 0; > > +} > > + > > +static int __maybe_unused ov02a10_runtime_resume(struct device *dev) > > +{ > > + struct i2c_client *client = to_i2c_client(dev); > > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + return __ov02a10_power_on(ov02a10); > > +} > > + > > +static int __maybe_unused ov02a10_runtime_suspend(struct device *dev) > > +{ > > + struct i2c_client *client = to_i2c_client(dev); > > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + __ov02a10_power_off(ov02a10); > > + > > + return 0; > > +} > > + > > +static const struct dev_pm_ops ov02a10_pm_ops = { > > + SET_RUNTIME_PM_OPS(ov02a10_runtime_suspend, > > + ov02a10_runtime_resume, NULL) > > +}; > > + > > +static int ov02a10_set_test_pattern(struct ov02a10 *ov02a10, s32 value) > > +{ > > + if (value) > > + return ov02a10_write_array(ov02a10, > > + ov02a10_test_pattern_enable_regs); > > + > > + return ov02a10_write_array(ov02a10, > > + ov02a10_test_pattern_disable_regs); > > Fits on previous line. > Sorry for the typo. Fixed in next release. > > +} > > + > > +static int ov02a10_set_ctrl(struct v4l2_ctrl *ctrl) > > +{ > > + struct ov02a10 *ov02a10 = container_of(ctrl->handler, > > + struct ov02a10, ctrl_handler); > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + s64 max_expo; > > + int ret; > > + > > + /* Propagate change of current control to all related controls */ > > + if (ctrl->id == V4L2_CID_VBLANK) { > > + /* Update max exposure while meeting expected vblanking */ > > + max_expo = ov02a10->cur_mode->height + ctrl->val - 4; > > + __v4l2_ctrl_modify_range(ov02a10->exposure, > > + ov02a10->exposure->minimum, max_expo, > > + ov02a10->exposure->step, > > + ov02a10->exposure->default_value); > > + } > > + > > + /* 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_EXPOSURE: > > + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_EXPOSURE_H, > > + ((ctrl->val >> 8) & 0xFF)); > > + if (!ret) { > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_EXPOSURE_L, > > + (ctrl->val & 0xFF)); > > + if (ret < 0) > > + return ret; > > + } > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + break; > > + case V4L2_CID_ANALOGUE_GAIN: > > + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_GAIN, > > + (ctrl->val & 0xFF)); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + break; > > + case V4L2_CID_VBLANK: > > + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_VTS_H, > > + (((ctrl->val + > > + ov02a10->cur_mode->height - > > + OV02A10_BASIC_LINE) >> 8) > > + & 0xFF)); > > + if (!ret) { > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_VTS_L, > > + ((ctrl->val + > > + ov02a10->cur_mode->height - > > + OV02A10_BASIC_LINE) & 0xFF)); > > + if (ret < 0) > > + return ret; > > + } > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + break; > > + case V4L2_CID_TEST_PATTERN: > > + ret = ov02a10_set_test_pattern(ov02a10, ctrl->val); > > + if (ret < 0) > > + return ret; > > + break; > > + default: > > + dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n", > > + __func__, ctrl->id, ctrl->val); > > + ret = -EINVAL; > > + break; > > + }; > > + > > + pm_runtime_put(&client->dev); > > + > > + return ret; > > +} > > + > > +static const struct v4l2_subdev_video_ops ov02a10_video_ops = { > > + .s_stream = ov02a10_s_stream, > > +}; > > + > > +static const struct v4l2_subdev_pad_ops ov02a10_pad_ops = { > > + .init_cfg = ov02a10_entity_init_cfg, > > + .enum_mbus_code = ov02a10_enum_mbus_code, > > + .enum_frame_size = ov02a10_enum_frame_sizes, > > + .get_fmt = ov02a10_get_fmt, > > + .set_fmt = ov02a10_set_fmt, > > +}; > > + > > +static const struct v4l2_subdev_ops ov02a10_subdev_ops = { > > + .video = &ov02a10_video_ops, > > + .pad = &ov02a10_pad_ops, > > +}; > > + > > +static const struct media_entity_operations ov02a10_subdev_entity_ops = { > > + .link_validate = v4l2_subdev_link_validate, > > +}; > > + > > +static const struct v4l2_subdev_internal_ops ov02a10_internal_ops = { > > + .open = ov02a10_open, > > +}; > > + > > +static const struct v4l2_ctrl_ops ov02a10_ctrl_ops = { > > + .s_ctrl = ov02a10_set_ctrl, > > +}; > > + > > +static int ov02a10_initialize_controls(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + const struct ov02a10_mode *mode; > > + struct v4l2_ctrl_handler *handler; > > + struct v4l2_ctrl *ctrl; > > + u64 exposure_max; > > + u32 pixel_rate, h_blank; > > + int ret; > > + > > + handler = &ov02a10->ctrl_handler; > > + mode = ov02a10->cur_mode; > > + ret = v4l2_ctrl_handler_init(handler, 10); > > + if (ret) > > + return ret; > > An extra newline here, please. > Sorry for the typo. Fixed in next release. > > + handler->lock = &ov02a10->mutex; > > + > > + ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ, > > + 0, 0, link_freq_menu_items); > > + if (ctrl) > > + ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; > > + > > + pixel_rate = (link_freq_menu_items[0] * 2 * OV02A10_LANES) / > > + OV02A10_BITS_PER_SAMPLE; > > Please use do_div(). The values are static so the compiler may not emit the > instructions for division but better be safe than sorry. > Fixed in next release. > > + v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, > > + 0, pixel_rate, 1, pixel_rate); > > + > > + h_blank = mode->hts_def - mode->width; > > + ov02a10->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, > > + h_blank, h_blank, 1, h_blank); > > + if (ov02a10->hblank) > > + ov02a10->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; > > + > > + ov02a10->vblank = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, > > + V4L2_CID_VBLANK, mode->vts_def - > > + mode->height, > > + OV02A10_VTS_MAX - mode->height, 1, > > + mode->vts_def - mode->height); > > + > > + exposure_max = mode->vts_def - 4; > > + ov02a10->exposure = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, > > + V4L2_CID_EXPOSURE, > > + OV02A10_EXPOSURE_MIN, > > + exposure_max, > > + OV02A10_EXPOSURE_STEP, > > + mode->exp_def); > > + > > + ov02a10->anal_gain = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, > > + V4L2_CID_ANALOGUE_GAIN, > > + OV02A10_GAIN_MIN, > > + OV02A10_GAIN_MAX, > > + OV02A10_GAIN_STEP, > > + OV02A10_GAIN_DEFAULT); > > + > > + ov02a10->test_pattern = > > + v4l2_ctrl_new_std_menu_items(handler, > > Indentation. If some of the arguments slip over 80 I guess we can live with > that. > Got it. Fixed in next release. > > + &ov02a10_ctrl_ops, > > + V4L2_CID_TEST_PATTERN, > > + ARRAY_SIZE(ov02a10_test_pattern_menu) - > > + 1, 0, 0, ov02a10_test_pattern_menu); > > + > > + if (handler->error) { > > + ret = handler->error; > > + dev_err(&client->dev, > > + "Failed to init controls(%d)\n", ret); > > Fits on the previous line. > Fixed in next release. > > + goto err_free_handler; > > + } > > + > > + ov02a10->subdev.ctrl_handler = handler; > > + > > + return 0; > > + > > +err_free_handler: > > + v4l2_ctrl_handler_free(handler); > > + > > + return ret; > > +} > > + > > +static int ov02a10_check_sensor_id(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + u16 id; > > + u8 pid = 0; > > + u8 ver = 0; > > + int ret; > > + > > + /* Check sensor revision */ > > + ret = ov02a10_read_reg(ov02a10, OV02A10_REG_CHIP_ID_H, &pid); > > + if (ret) > > + return ret; > > + > > + ret = ov02a10_read_reg(ov02a10, OV02A10_REG_CHIP_ID_L, &ver); > > + if (ret) > > + return ret; > > + > > + id = OV02A10_ID(pid, ver); > > + if (id != CHIP_ID) { > > + dev_err(&client->dev, "Unexpected sensor id(%04x)\n", id); > > + return ret; > > + } > > + > > + dev_info(&client->dev, "Detected OV%04X sensor\n", id); > > + > > + return 0; > > +} > > + > > +static int ov02a10_configure_regulators(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + unsigned int i; > > + > > + for (i = 0; i < OV02A10_NUM_SUPPLIES; i++) > > + ov02a10->supplies[i].supply = ov02a10_supply_names[i]; > > + > > + return devm_regulator_bulk_get(&client->dev, > > + OV02A10_NUM_SUPPLIES, > > + ov02a10->supplies); > > +} > > + > > +static int ov02a10_probe(struct i2c_client *client) > > +{ > > + struct device *dev = &client->dev; > > + struct ov02a10 *ov02a10; > > + u32 rotation; > > + u32 xclk_freq; > > + int ret; > > + > > + ov02a10 = devm_kzalloc(dev, sizeof(*ov02a10), GFP_KERNEL); > > + if (!ov02a10) > > + return -ENOMEM; > > + > > + v4l2_i2c_subdev_init(&ov02a10->subdev, client, &ov02a10_subdev_ops); > > + ov02a10->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10; > > + > > + /* Optional indication of physical rotation of sensor */ > > + ret = fwnode_property_read_u32(dev_fwnode(dev), "rotation", > > + &rotation); > > + if (!ret) { > > + switch (rotation) { > > + case 180: > > + ov02a10->upside_down = true; > > + ov02a10->fmt.code = MEDIA_BUS_FMT_SRGGB10_1X10; > > + break; > > + case 0: > > + break; > > + default: > > + dev_warn(dev, "%u degrees rotation is not supported, ignoring...\n", > > + rotation); > > + } > > + } > > + > > Please also check that the link frequencies in DT match with what the > driver expects. See e.g. drivers/media/i2c/ov8856.c driver for an example. > I would have a try and set one check rule for link frequencies. > > + /* Get system clock (xvclk) */ > > + ov02a10->xvclk = devm_clk_get(dev, "xvclk"); > > + if (IS_ERR(ov02a10->xvclk)) { > > + dev_err(dev, "Failed to get xvclk\n"); > > + return -EINVAL; > > + } > > + > > + ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq); > > + if (ret) { > > + dev_err(dev, "Failed to get xclk frequency\n"); > > + return ret; > > + } > > + > > + /* External clock must be 24MHz, allow 1% tolerance */ > > + if (xclk_freq < 23760000 || xclk_freq > 24240000) { > > + dev_err(dev, "external clock frequency %u is not supported\n", > > + xclk_freq); > > + return -EINVAL; > > + } > > + dev_dbg(dev, "external clock frequency %u\n", xclk_freq); > > + > > + ret = clk_set_rate(ov02a10->xvclk, xclk_freq); > > + if (ret) { > > + dev_err(dev, "Failed to set xvclk frequency (24MHz)\n"); > > + return ret; > > + } > > + > > + ov02a10->powerdown_gpio = devm_gpiod_get(dev, "powerdown", > > + GPIOD_OUT_LOW); > > + if (IS_ERR(ov02a10->powerdown_gpio)) { > > + dev_err(dev, "Failed to get powerdown-gpios\n"); > > + return -EINVAL; > > + } > > + > > + ov02a10->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); > > + if (IS_ERR(ov02a10->reset_gpio)) { > > + dev_err(dev, "Failed to get reset-gpios\n"); > > + return -EINVAL; > > + } > > + > > + ret = ov02a10_configure_regulators(ov02a10); > > + if (ret) { > > + dev_err(dev, "Failed to get power regulators\n"); > > + return ret; > > + } > > + > > + mutex_init(&ov02a10->mutex); > > + ov02a10->cur_mode = &supported_modes[0]; > > + ret = ov02a10_initialize_controls(ov02a10); > > + if (ret) { > > + dev_err(dev, "Failed to initialize controls\n"); > > + goto err_destroy_mutex; > > + } > > + > > + ret = __ov02a10_power_on(ov02a10); > > + if (ret) > > + goto err_free_handler; > > + > > + ret = ov02a10_check_sensor_id(ov02a10); > > + if (ret) > > + goto err_power_off; > > + > > + ov02a10->subdev.internal_ops = &ov02a10_internal_ops; > > + ov02a10->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; > > + ov02a10->subdev.entity.ops = &ov02a10_subdev_entity_ops; > > + ov02a10->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR; > > + ov02a10->pad.flags = MEDIA_PAD_FL_SOURCE; > > + ret = media_entity_pads_init(&ov02a10->subdev.entity, 1, &ov02a10->pad); > > + if (ret < 0) { > > + dev_err(dev, "failed to init entity pads: %d", ret); > > + goto err_power_off; > > + } > > + > > + ret = v4l2_async_register_subdev(&ov02a10->subdev); > > + if (ret) { > > + dev_err(dev, "failed to register V4L2 subdev: %d", > > + ret); > > + goto err_clean_entity; > > + } > > + > > + pm_runtime_set_active(dev); > > + pm_runtime_enable(dev); > > + pm_runtime_idle(dev); > > + > > + dev_info(dev, "ov02a10 probe --\n"); > > This isn't very informative. The driver already prints errors when probing > fails and otherwise it succeeds. Please remove. > This would be removed in next release. > > + return 0; > > + > > +err_clean_entity: > > + media_entity_cleanup(&ov02a10->subdev.entity); > > +err_power_off: > > + __ov02a10_power_off(ov02a10); > > +err_free_handler: > > + v4l2_ctrl_handler_free(ov02a10->subdev.ctrl_handler); > > +err_destroy_mutex: > > + mutex_destroy(&ov02a10->mutex); > > + > > + return ret; > > +} > > + > > +static int ov02a10_remove(struct i2c_client *client) > > +{ > > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + v4l2_async_unregister_subdev(sd); > > + media_entity_cleanup(&sd->entity); > > + v4l2_ctrl_handler_free(sd->ctrl_handler); > > + pm_runtime_disable(&client->dev); > > + if (!pm_runtime_status_suspended(&client->dev)) > > + __ov02a10_power_off(ov02a10); > > + pm_runtime_set_suspended(&client->dev); > > + mutex_destroy(&ov02a10->mutex); > > + > > + return 0; > > +} > > + > > +#if IS_ENABLED(CONFIG_OF) > > +static const struct of_device_id ov02a10_of_match[] = { > > + { .compatible = "ovti,ov02a10" }, > > + {}, > > +}; > > +MODULE_DEVICE_TABLE(of, ov02a10_of_match); > > +#endif > > + > > +static struct i2c_driver ov02a10_i2c_driver = { > > + .driver = { > > + .name = "ov02a10", > > + .pm = &ov02a10_pm_ops, > > + .of_match_table = ov02a10_of_match, > > + }, > > + .probe_new = &ov02a10_probe, > > + .remove = &ov02a10_remove, > > +}; > > + > > +module_i2c_driver(ov02a10_i2c_driver); > > + > > +MODULE_AUTHOR("Dongchun Zhu "); > > +MODULE_DESCRIPTION("OmniVision OV02A10 sensor driver"); > > +MODULE_LICENSE("GPL v2"); > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 03CEEC3A5A5 for ; Thu, 5 Sep 2019 09:41:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AEE1922CF5 for ; Thu, 5 Sep 2019 09:41:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731738AbfIEJlZ (ORCPT ); Thu, 5 Sep 2019 05:41:25 -0400 Received: from mailgw02.mediatek.com ([1.203.163.81]:4934 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1731058AbfIEJlZ (ORCPT ); Thu, 5 Sep 2019 05:41:25 -0400 X-UUID: 995a61aa3d1f450a9b5230693c9910d6-20190905 X-UUID: 995a61aa3d1f450a9b5230693c9910d6-20190905 Received: from mtkcas35.mediatek.inc [(172.27.4.253)] by mailgw02.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLS) with ESMTP id 44299033; Thu, 05 Sep 2019 17:41:06 +0800 Received: from MTKCAS36.mediatek.inc (172.27.4.186) by MTKMBS31N2.mediatek.inc (172.27.4.87) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 5 Sep 2019 17:41:05 +0800 Received: from [10.17.3.153] (172.27.4.253) by MTKCAS36.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 5 Sep 2019 17:41:03 +0800 Message-ID: <1567676465.21623.100.camel@mhfsdcap03> Subject: Re: [V3, 2/2] media: i2c: Add Omnivision OV02A10 camera sensor driver From: Dongchun Zhu To: Sakari Ailus CC: , , , , , , , , , , , , , , Date: Thu, 5 Sep 2019 17:41:05 +0800 In-Reply-To: <20190819083009.GC6133@paasikivi.fi.intel.com> References: <20190819034331.13098-1-dongchun.zhu@mediatek.com> <20190819034331.13098-3-dongchun.zhu@mediatek.com> <20190819083009.GC6133@paasikivi.fi.intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-TM-SNTS-SMTP: 36B00490CA9840AAEB2B1C185E6B5010A0B31831FDA35477F6AACC9406560B6F2000:8 X-MTK: N Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hi Sakari, On Mon, 2019-08-19 at 11:30 +0300, Sakari Ailus wrote: > Hi Dongchun, > > Thanks for the update. > > On Mon, Aug 19, 2019 at 11:43:31AM +0800, dongchun.zhu@mediatek.com wrote: > > From: Dongchun Zhu > > > > This patch adds a V4L2 sub-device driver for OV02A10 image sensor. > > The OV02A10 is a 1/5" CMOS sensor from Omnivision, > > which supports output format: 10-bit Raw. > > The OV02A10 has a single MIPI lane interface and use the I2C bus > > for control and the CSI-2 bus for data. > > > > Signed-off-by: Dongchun Zhu > > --- > > MAINTAINERS | 1 + > > drivers/media/i2c/Kconfig | 11 + > > drivers/media/i2c/Makefile | 1 + > > drivers/media/i2c/ov02a10.c | 1018 +++++++++++++++++++++++++++++++++++++++++++ > > 4 files changed, 1031 insertions(+) > > create mode 100644 drivers/media/i2c/ov02a10.c > > > > diff --git a/MAINTAINERS b/MAINTAINERS > > index 41734fb..4b714a2 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -11821,6 +11821,7 @@ M: Dongchun Zhu > > L: linux-media@vger.kernel.org > > T: git git://linuxtv.org/media_tree.git > > S: Maintained > > +F: drivers/media/i2c/ov02a10.c > > F: Documentation/devicetree/bindings/media/i2c/ov02a10.txt > > > > OMNIVISION OV2680 SENSOR DRIVER > > diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig > > index 79ce9ec..d063a82 100644 > > --- a/drivers/media/i2c/Kconfig > > +++ b/drivers/media/i2c/Kconfig > > @@ -617,6 +617,17 @@ config VIDEO_IMX355 > > To compile this driver as a module, choose M here: the > > module will be called imx355. > > > > +config VIDEO_OV02A10 > > + tristate "OmniVision OV02A10 sensor support" > > + depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API > > + depends on MEDIA_CAMERA_SUPPORT > > + help > > + This is a Video4Linux2 sensor driver for the OmniVision > > + OV02A10 camera. > > + > > + To compile this driver as a module, choose M here: the > > + module will be called ov02a10. > > + > > 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 fd4ea86..f34a7ac 100644 > > --- a/drivers/media/i2c/Makefile > > +++ b/drivers/media/i2c/Makefile > > @@ -71,6 +71,7 @@ obj-$(CONFIG_VIDEO_OV5645) += ov5645.o > > obj-$(CONFIG_VIDEO_OV5647) += ov5647.o > > obj-$(CONFIG_VIDEO_OV5670) += ov5670.o > > obj-$(CONFIG_VIDEO_OV5695) += ov5695.o > > +obj-$(CONFIG_VIDEO_OV02A10) += ov02a10.o > > obj-$(CONFIG_VIDEO_OV6650) += ov6650.o > > obj-$(CONFIG_VIDEO_OV7251) += ov7251.o > > obj-$(CONFIG_VIDEO_OV7640) += ov7640.o > > diff --git a/drivers/media/i2c/ov02a10.c b/drivers/media/i2c/ov02a10.c > > new file mode 100644 > > index 0000000..ff5460a > > --- /dev/null > > +++ b/drivers/media/i2c/ov02a10.c > > @@ -0,0 +1,1018 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * Copyright (c) 2018 MediaTek Inc. > > + */ > > + > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > + > > +#define CHIP_ID 0x2509 > > +#define OV02A10_REG_CHIP_ID_H 0x02 > > +#define OV02A10_REG_CHIP_ID_L 0x03 > > +#define OV02A10_ID(_msb, _lsb) ((_msb) << 8 | (_lsb)) > > + > > +/* Bit[1] vertical upside down */ > > +/* Bit[0] horizontal mirror */ > > +#define REG_MIRROR_FLIP_CONTROL 0x3f > > + > > +/* Orientation */ > > +#define REG_CONFIG_MIRROR_FLIP 0x03 > > + > > +#define REG_PAGE_SWITCH 0xfd > > +#define REG_GLOBAL_EFFECTIVE 0x01 > > +#define REG_ENABLE BIT(0) > > + > > +#define REG_SC_CTRL_MODE 0xac > > +#define SC_CTRL_MODE_STANDBY 0x00 > > +#define SC_CTRL_MODE_STREAMING 0x01 > > + > > +#define OV02A10_REG_EXPOSURE_H 0x03 > > +#define OV02A10_REG_EXPOSURE_L 0x04 > > +#define OV02A10_EXPOSURE_MIN 4 > > +#define OV02A10_EXPOSURE_STEP 1 > > + > > +#define OV02A10_REG_VTS_H 0x05 > > +#define OV02A10_REG_VTS_L 0x06 > > +#define OV02A10_VTS_MAX 0x209f > > +#define OV02A10_VTS_MIN 0x04cf > > +#define OV02A10_BASIC_LINE 1224 > > + > > +#define OV02A10_REG_GAIN 0x24 > > +#define OV02A10_GAIN_MIN 0x10 > > +#define OV02A10_GAIN_MAX 0xf8 > > +#define OV02A10_GAIN_STEP 0x01 > > +#define OV02A10_GAIN_DEFAULT 0x40 > > + > > +#define REG_NULL 0xff > > + > > +#define OV02A10_LANES 1 > > +#define OV02A10_BITS_PER_SAMPLE 10 > > + > > +static const char * const ov02a10_supply_names[] = { > > + "dovdd", /* Digital I/O power */ > > + "avdd", /* Analog power */ > > + "dvdd", /* Digital core power */ > > +}; > > + > > +#define OV02A10_NUM_SUPPLIES ARRAY_SIZE(ov02a10_supply_names) > > + > > +struct regval { > > + u16 addr; > > + u8 val; > > +}; > > + > > +struct ov02a10_mode { > > + u32 width; > > + u32 height; > > + u32 exp_def; > > + u32 hts_def; > > + u32 vts_def; > > + const struct regval *reg_list; > > +}; > > + > > +struct ov02a10 { > > + struct clk *xvclk; > > + struct gpio_desc *powerdown_gpio; > > + struct gpio_desc *reset_gpio; > > + struct regulator_bulk_data supplies[OV02A10_NUM_SUPPLIES]; > > + > > + bool streaming; > > + bool upside_down; > > + > > + /* > > + * Serialize control access, get/set format, get selection > > + * and start streaming. > > + */ > > + struct mutex mutex; > > + struct v4l2_subdev subdev; > > + struct media_pad pad; > > + struct v4l2_ctrl *anal_gain; > > + struct v4l2_ctrl *exposure; > > + struct v4l2_ctrl *hblank; > > + struct v4l2_ctrl *vblank; > > + struct v4l2_ctrl *hflip; > > + struct v4l2_ctrl *vflip; > > + struct v4l2_ctrl *test_pattern; > > + struct v4l2_mbus_framefmt fmt; > > + struct v4l2_ctrl_handler ctrl_handler; > > + > > + const struct ov02a10_mode *cur_mode; > > +}; > > + > > +#define to_ov02a10(sd) container_of(sd, struct ov02a10, subdev) > > + > > +static inline void msleep_range(unsigned int delay_base) > > +{ > > + usleep_range(delay_base * 1000, delay_base * 1000 + 500); > > +} > > + > > +/* MIPI color bar enable output */ > > +static const struct regval ov02a10_test_pattern_enable_regs[] = { > > + {0xfd, 0x01}, > > + {0x0d, 0x00}, > > + {0xb6, 0x01}, > > + {0x01, 0x01}, > > + {0xfd, 0x01}, > > + {0xac, 0x01}, > > + {REG_NULL, 0x00} > > +}; > > + > > +/* MIPI color bar disable output */ > > +static const struct regval ov02a10_test_pattern_disable_regs[] = { > > + {0xfd, 0x01}, > > + {0x0d, 0x00}, > > + {0xb6, 0x00}, > > + {0x01, 0x01}, > > + {0xfd, 0x01}, > > + {0xac, 0x01}, > > + {REG_NULL, 0x00} > > +}; > > + > > +/* > > + * xvclk 24Mhz > > + * pclk 39Mhz > > + * linelength 934(0x3a6) > > + * framelength 1390(0x56e) > > + * grabwindow_width 1600 > > + * grabwindow_height 1200 > > + * max_framerate 30fps > > + * mipi_datarate per lane 780Mbps > > + */ > > +static const struct regval ov02a10_1600x1200_regs[] = { > > + {0xfd, 0x01}, > > + {0xac, 0x00}, > > + {0xfd, 0x00}, > > + {0x2f, 0x29}, > > + {0x34, 0x00}, > > + {0x35, 0x21}, > > + {0x30, 0x15}, > > + {0x33, 0x01}, > > + {0xfd, 0x01}, > > + {0x44, 0x00}, > > + {0x2a, 0x4c}, > > + {0x2b, 0x1e}, > > + {0x2c, 0x60}, > > + {0x25, 0x11}, > > + {0x03, 0x01}, > > + {0x04, 0xae}, > > + {0x09, 0x00}, > > + {0x0a, 0x02}, > > + {0x06, 0xa6}, > > + {0x31, 0x00}, > > + {0x24, 0x40}, > > + {0x01, 0x01}, > > + {0xfb, 0x73}, > > + {0xfd, 0x01}, > > + {0x16, 0x04}, > > + {0x1c, 0x09}, > > + {0x21, 0x42}, > > + {0x12, 0x04}, > > + {0x13, 0x10}, > > + {0x11, 0x40}, > > + {0x33, 0x81}, > > + {0xd0, 0x00}, > > + {0xd1, 0x01}, > > + {0xd2, 0x00}, > > + {0x50, 0x10}, > > + {0x51, 0x23}, > > + {0x52, 0x20}, > > + {0x53, 0x10}, > > + {0x54, 0x02}, > > + {0x55, 0x20}, > > + {0x56, 0x02}, > > + {0x58, 0x48}, > > + {0x5d, 0x15}, > > + {0x5e, 0x05}, > > + {0x66, 0x66}, > > + {0x68, 0x68}, > > + {0x6b, 0x00}, > > + {0x6c, 0x00}, > > + {0x6f, 0x40}, > > + {0x70, 0x40}, > > + {0x71, 0x0a}, > > + {0x72, 0xf0}, > > + {0x73, 0x10}, > > + {0x75, 0x80}, > > + {0x76, 0x10}, > > + {0x84, 0x00}, > > + {0x85, 0x10}, > > + {0x86, 0x10}, > > + {0x87, 0x00}, > > + {0x8a, 0x22}, > > + {0x8b, 0x22}, > > + {0x19, 0xf1}, > > + {0x29, 0x01}, > > + {0xfd, 0x01}, > > + {0x9d, 0xd6}, > > + {0xa0, 0x29}, > > + {0xa1, 0x03}, > > + {0xad, 0x62}, > > + {0xae, 0x00}, > > + {0xaf, 0x85}, > > + {0xb1, 0x01}, > > + {0x8e, 0x06}, > > + {0x8f, 0x40}, > > + {0x90, 0x04}, > > + {0x91, 0xb0}, > > + {0x45, 0x01}, > > + {0x46, 0x00}, > > + {0x47, 0x6c}, > > + {0x48, 0x03}, > > + {0x49, 0x8b}, > > + {0x4a, 0x00}, > > + {0x4b, 0x07}, > > + {0x4c, 0x04}, > > + {0x4d, 0xb7}, > > + {0xf0, 0x40}, > > + {0xf1, 0x40}, > > + {0xf2, 0x40}, > > + {0xf3, 0x40}, > > + {0x3f, 0x00}, > > + {0xfd, 0x01}, > > + {0x05, 0x00}, > > + {0x06, 0xa6}, > > + {0xfd, 0x01}, > > + {REG_NULL, 0x00} > > +}; > > + > > +#define OV02A10_LINK_FREQ_390MHZ 390000000 > > +static const s64 link_freq_menu_items[] = { > > + OV02A10_LINK_FREQ_390MHZ > > +}; > > + > > +static const char * const ov02a10_test_pattern_menu[] = { > > + "Disabled", > > + "Color Bar", > > +}; > > + > > +static const struct ov02a10_mode supported_modes[] = { > > + { > > + .width = 1600, > > + .height = 1200, > > + .exp_def = 0x01ae, > > + .hts_def = 0x03a6, > > + .vts_def = 0x056e, > > + .reg_list = ov02a10_1600x1200_regs, > > + }, > > +}; > > + > > +/* Write a register */ > > +static int ov02a10_write_reg(struct ov02a10 *ov02a10, u8 addr, u8 val) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + u8 buf[2] = {addr, val}; > > + int ret; > > + > > + ret = i2c_master_send(client, buf, 2); > > + > > + if (ret != 2) { > > + dev_err(&client->dev, "%s: error: reg=%x, val=%x\n", > > + __func__, addr, val); > > + return -EIO; > > + } > > + > > + return 0; > > +} > > + > > +static int ov02a10_write_array(struct ov02a10 *ov02a10, > > + const struct regval *regs) > > +{ > > + u32 i; > > unsigned int, please. > Fixed in next release. > > + int ret; > > + > > + for (i = 0; regs[i].addr != REG_NULL; i++) { > > + ret = ov02a10_write_reg(ov02a10, regs[i].addr, regs[i].val); > > + if (ret < 0) > > + return ret; > > + } > > + > > + return 0; > > +} > > + > > +/* Read a register */ > > +static int ov02a10_read_reg(struct ov02a10 *ov02a10, u8 reg, u8 *val) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + u8 data = reg; > > + struct i2c_msg msg = { > > + .addr = client->addr, > > + .flags = 0, > > + .len = 1, > > + .buf = &data, > > + }; > > + int ret; > > + > > + ret = i2c_transfer(client->adapter, &msg, 1); > > + if (ret < 0) > > + goto err_wr; > > + > > + msg.flags = I2C_M_RD; > > + ret = i2c_transfer(client->adapter, &msg, 1); > > + if (ret < 0) > > + goto err_rd; > > + > > + *val = data; > > + return 0; > > + > > +err_rd: > > + dev_err(&client->dev, "i2c_transfer --I2C_M_RD failed\n"); > > +err_wr: > > + dev_err(&client->dev, "read error: reg=0x%02x: %d\n", reg, ret); > > + return ret; > > +} > > + > > +static void ov02a10_fill_fmt(const struct ov02a10_mode *mode, > > + struct v4l2_mbus_framefmt *fmt) > > +{ > > + fmt->width = mode->width; > > + fmt->height = mode->height; > > + fmt->field = V4L2_FIELD_NONE; > > +} > > + > > +static int ov02a10_set_fmt(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_format *fmt) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; > > + > > + mutex_lock(&ov02a10->mutex); > > + > > + if (ov02a10->streaming) { > > + mutex_unlock(&ov02a10->mutex); > > + return -EBUSY; > > + } > > + > > + /* Only one sensor mode supported */ > > + mbus_fmt->code = ov02a10->fmt.code; > > + ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); > > + ov02a10->fmt = fmt->format; > > + > > + mutex_unlock(&ov02a10->mutex); > > + > > + return 0; > > +} > > + > > +static int ov02a10_get_fmt(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_format *fmt) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; > > + > > + mutex_lock(&ov02a10->mutex); > > + > > + fmt->format = ov02a10->fmt; > > + mbus_fmt->code = ov02a10->fmt.code; > > + ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); > > + > > + mutex_unlock(&ov02a10->mutex); > > + > > + return 0; > > +} > > + > > +static int ov02a10_enum_mbus_code(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_mbus_code_enum *code) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + if (code->index >= ARRAY_SIZE(supported_modes) || !(code->index)) > > This doesn't make sense. The supported modes, should more be added in the > future, are presumably using the same mbus code. If you only have one, then > non-zero code->index would result in -EINVAL (and not zero code->index). > Thanks for kind reminder. !(code->index) would be removed in next release. > > + return -EINVAL; > > + > > + code->code = ov02a10->fmt.code; > > + > > + return 0; > > +} > > + > > +static int ov02a10_enum_frame_sizes(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_frame_size_enum *fse) > > +{ > > + if (fse->index >= ARRAY_SIZE(supported_modes) || !(fse->index)) > > + return -EINVAL; > > + > > + fse->min_width = supported_modes[fse->index].width; > > + fse->max_width = supported_modes[fse->index].width; > > + fse->max_height = supported_modes[fse->index].height; > > + fse->min_height = supported_modes[fse->index].height; > > + > > + return 0; > > +} > > + > > +static int __ov02a10_power_on(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + struct device *dev = &client->dev; > > + int ret; > > + > > + ret = clk_prepare_enable(ov02a10->xvclk); > > + if (ret < 0) { > > + dev_err(dev, "Failed to enable xvclk\n"); > > + return ret; > > + } > > + > > + /* Note: set 0 is high, set 1 is low */ > > + gpiod_set_value_cansleep(ov02a10->reset_gpio, 1); > > + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 0); > > + > > + ret = regulator_bulk_enable(OV02A10_NUM_SUPPLIES, ov02a10->supplies); > > + if (ret < 0) { > > + dev_err(dev, "Failed to enable regulators\n"); > > + goto disable_clk; > > + } > > + msleep_range(7); > > This has some potential of clashing with more generic functions in the > future. Please use usleep_range directly, or msleep. > Did you mean using usleep_range(7*1000, 8*1000), as used in patch v1? https://patchwork.kernel.org/patch/10957225/ > > + > > + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 1); > > + msleep_range(10); > > + > > + gpiod_set_value_cansleep(ov02a10->reset_gpio, 0); > > + msleep_range(10); > > + > > + return 0; > > + > > +disable_clk: > > + clk_disable_unprepare(ov02a10->xvclk); > > + > > + return ret; > > +} > > + > > +static void __ov02a10_power_off(struct ov02a10 *ov02a10) > > +{ > > + clk_disable_unprepare(ov02a10->xvclk); > > + gpiod_set_value_cansleep(ov02a10->reset_gpio, 1); > > + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 1); > > + regulator_bulk_disable(OV02A10_NUM_SUPPLIES, ov02a10->supplies); > > +} > > + > > +static int __ov02a10_start_stream(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + int ret; > > + > > + /* Apply default values of current mode */ > > + ret = ov02a10_write_array(ov02a10, ov02a10->cur_mode->reg_list); > > + if (ret) > > + return ret; > > + > > + /* Apply customized values from user */ > > + ret = __v4l2_ctrl_handler_setup(ov02a10->subdev.ctrl_handler); > > + if (ret) > > + return ret; > > + > > + /* Set orientation to 180 degree */ > > + if (ov02a10->upside_down) { > > + ret = ov02a10_write_reg(ov02a10, REG_MIRROR_FLIP_CONTROL, > > + REG_CONFIG_MIRROR_FLIP); > > + if (ret) { > > + dev_err(&client->dev, "%s failed to set orientation\n", > > + __func__); > > + return ret; > > + } > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + } > > + > > + /* Set stream on register */ > > + return ov02a10_write_reg(ov02a10, > > + REG_SC_CTRL_MODE, SC_CTRL_MODE_STREAMING); > > +} > > + > > +static int __ov02a10_stop_stream(struct ov02a10 *ov02a10) > > +{ > > + return ov02a10_write_reg(ov02a10, > > + REG_SC_CTRL_MODE, SC_CTRL_MODE_STANDBY); > > +} > > + > > +static int ov02a10_entity_init_cfg(struct v4l2_subdev *subdev, > > + struct v4l2_subdev_pad_config *cfg) > > +{ > > + struct v4l2_subdev_format fmt = { 0 }; > > + > > + fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; > > + fmt.format.width = 1600; > > + fmt.format.height = 1200; > > + > > + ov02a10_set_fmt(subdev, cfg, &fmt); > > + > > + return 0; > > +} > > + > > +static int ov02a10_s_stream(struct v4l2_subdev *sd, int on) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + int ret = 0; > > + > > + mutex_lock(&ov02a10->mutex); > > + > > + if (ov02a10->streaming == on) > > + goto unlock_and_return; > > + > > + if (on) { > > + ret = pm_runtime_get_sync(&client->dev); > > + if (ret < 0) { > > + pm_runtime_put_noidle(&client->dev); > > + goto unlock_and_return; > > + } > > + > > + ret = __ov02a10_start_stream(ov02a10); > > + if (ret) { > > + __ov02a10_stop_stream(ov02a10); > > + ov02a10->streaming = !on; > > + goto err_rpm_put; > > + } > > + } else { > > + __ov02a10_stop_stream(ov02a10); > > + pm_runtime_put(&client->dev); > > + } > > + > > + ov02a10->streaming = on; > > + mutex_unlock(&ov02a10->mutex); > > + > > + return ret; > > + > > +err_rpm_put: > > + pm_runtime_put(&client->dev); > > +unlock_and_return: > > + mutex_unlock(&ov02a10->mutex); > > + > > + return ret; > > +} > > + > > +static int ov02a10_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct v4l2_mbus_framefmt *try_fmt = v4l2_subdev_get_try_format(sd, > > + fh->pad, > > + 0); > > + > > + mutex_lock(&ov02a10->mutex); > > + /* Initialize try_fmt */ > > + try_fmt->code = ov02a10->fmt.code; > > + ov02a10_fill_fmt(&supported_modes[0], try_fmt); > > + > > + mutex_unlock(&ov02a10->mutex); > > No need for the mutex: the supported values are static and there is no > parallel access to try_fmt. > > Btw. you don't need to do this here as you have init_cfg implemented, i.e. > you can omit the open callback. > Understood. mutex here would be removed in next release. > > + > > + return 0; > > +} > > + > > +static int __maybe_unused ov02a10_runtime_resume(struct device *dev) > > +{ > > + struct i2c_client *client = to_i2c_client(dev); > > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + return __ov02a10_power_on(ov02a10); > > +} > > + > > +static int __maybe_unused ov02a10_runtime_suspend(struct device *dev) > > +{ > > + struct i2c_client *client = to_i2c_client(dev); > > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + __ov02a10_power_off(ov02a10); > > + > > + return 0; > > +} > > + > > +static const struct dev_pm_ops ov02a10_pm_ops = { > > + SET_RUNTIME_PM_OPS(ov02a10_runtime_suspend, > > + ov02a10_runtime_resume, NULL) > > +}; > > + > > +static int ov02a10_set_test_pattern(struct ov02a10 *ov02a10, s32 value) > > +{ > > + if (value) > > + return ov02a10_write_array(ov02a10, > > + ov02a10_test_pattern_enable_regs); > > + > > + return ov02a10_write_array(ov02a10, > > + ov02a10_test_pattern_disable_regs); > > Fits on previous line. > Sorry for the typo. Fixed in next release. > > +} > > + > > +static int ov02a10_set_ctrl(struct v4l2_ctrl *ctrl) > > +{ > > + struct ov02a10 *ov02a10 = container_of(ctrl->handler, > > + struct ov02a10, ctrl_handler); > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + s64 max_expo; > > + int ret; > > + > > + /* Propagate change of current control to all related controls */ > > + if (ctrl->id == V4L2_CID_VBLANK) { > > + /* Update max exposure while meeting expected vblanking */ > > + max_expo = ov02a10->cur_mode->height + ctrl->val - 4; > > + __v4l2_ctrl_modify_range(ov02a10->exposure, > > + ov02a10->exposure->minimum, max_expo, > > + ov02a10->exposure->step, > > + ov02a10->exposure->default_value); > > + } > > + > > + /* 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_EXPOSURE: > > + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_EXPOSURE_H, > > + ((ctrl->val >> 8) & 0xFF)); > > + if (!ret) { > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_EXPOSURE_L, > > + (ctrl->val & 0xFF)); > > + if (ret < 0) > > + return ret; > > + } > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + break; > > + case V4L2_CID_ANALOGUE_GAIN: > > + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_GAIN, > > + (ctrl->val & 0xFF)); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + break; > > + case V4L2_CID_VBLANK: > > + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_VTS_H, > > + (((ctrl->val + > > + ov02a10->cur_mode->height - > > + OV02A10_BASIC_LINE) >> 8) > > + & 0xFF)); > > + if (!ret) { > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_VTS_L, > > + ((ctrl->val + > > + ov02a10->cur_mode->height - > > + OV02A10_BASIC_LINE) & 0xFF)); > > + if (ret < 0) > > + return ret; > > + } > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + break; > > + case V4L2_CID_TEST_PATTERN: > > + ret = ov02a10_set_test_pattern(ov02a10, ctrl->val); > > + if (ret < 0) > > + return ret; > > + break; > > + default: > > + dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n", > > + __func__, ctrl->id, ctrl->val); > > + ret = -EINVAL; > > + break; > > + }; > > + > > + pm_runtime_put(&client->dev); > > + > > + return ret; > > +} > > + > > +static const struct v4l2_subdev_video_ops ov02a10_video_ops = { > > + .s_stream = ov02a10_s_stream, > > +}; > > + > > +static const struct v4l2_subdev_pad_ops ov02a10_pad_ops = { > > + .init_cfg = ov02a10_entity_init_cfg, > > + .enum_mbus_code = ov02a10_enum_mbus_code, > > + .enum_frame_size = ov02a10_enum_frame_sizes, > > + .get_fmt = ov02a10_get_fmt, > > + .set_fmt = ov02a10_set_fmt, > > +}; > > + > > +static const struct v4l2_subdev_ops ov02a10_subdev_ops = { > > + .video = &ov02a10_video_ops, > > + .pad = &ov02a10_pad_ops, > > +}; > > + > > +static const struct media_entity_operations ov02a10_subdev_entity_ops = { > > + .link_validate = v4l2_subdev_link_validate, > > +}; > > + > > +static const struct v4l2_subdev_internal_ops ov02a10_internal_ops = { > > + .open = ov02a10_open, > > +}; > > + > > +static const struct v4l2_ctrl_ops ov02a10_ctrl_ops = { > > + .s_ctrl = ov02a10_set_ctrl, > > +}; > > + > > +static int ov02a10_initialize_controls(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + const struct ov02a10_mode *mode; > > + struct v4l2_ctrl_handler *handler; > > + struct v4l2_ctrl *ctrl; > > + u64 exposure_max; > > + u32 pixel_rate, h_blank; > > + int ret; > > + > > + handler = &ov02a10->ctrl_handler; > > + mode = ov02a10->cur_mode; > > + ret = v4l2_ctrl_handler_init(handler, 10); > > + if (ret) > > + return ret; > > An extra newline here, please. > Sorry for the typo. Fixed in next release. > > + handler->lock = &ov02a10->mutex; > > + > > + ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ, > > + 0, 0, link_freq_menu_items); > > + if (ctrl) > > + ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; > > + > > + pixel_rate = (link_freq_menu_items[0] * 2 * OV02A10_LANES) / > > + OV02A10_BITS_PER_SAMPLE; > > Please use do_div(). The values are static so the compiler may not emit the > instructions for division but better be safe than sorry. > Fixed in next release. > > + v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, > > + 0, pixel_rate, 1, pixel_rate); > > + > > + h_blank = mode->hts_def - mode->width; > > + ov02a10->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, > > + h_blank, h_blank, 1, h_blank); > > + if (ov02a10->hblank) > > + ov02a10->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; > > + > > + ov02a10->vblank = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, > > + V4L2_CID_VBLANK, mode->vts_def - > > + mode->height, > > + OV02A10_VTS_MAX - mode->height, 1, > > + mode->vts_def - mode->height); > > + > > + exposure_max = mode->vts_def - 4; > > + ov02a10->exposure = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, > > + V4L2_CID_EXPOSURE, > > + OV02A10_EXPOSURE_MIN, > > + exposure_max, > > + OV02A10_EXPOSURE_STEP, > > + mode->exp_def); > > + > > + ov02a10->anal_gain = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, > > + V4L2_CID_ANALOGUE_GAIN, > > + OV02A10_GAIN_MIN, > > + OV02A10_GAIN_MAX, > > + OV02A10_GAIN_STEP, > > + OV02A10_GAIN_DEFAULT); > > + > > + ov02a10->test_pattern = > > + v4l2_ctrl_new_std_menu_items(handler, > > Indentation. If some of the arguments slip over 80 I guess we can live with > that. > Got it. Fixed in next release. > > + &ov02a10_ctrl_ops, > > + V4L2_CID_TEST_PATTERN, > > + ARRAY_SIZE(ov02a10_test_pattern_menu) - > > + 1, 0, 0, ov02a10_test_pattern_menu); > > + > > + if (handler->error) { > > + ret = handler->error; > > + dev_err(&client->dev, > > + "Failed to init controls(%d)\n", ret); > > Fits on the previous line. > Fixed in next release. > > + goto err_free_handler; > > + } > > + > > + ov02a10->subdev.ctrl_handler = handler; > > + > > + return 0; > > + > > +err_free_handler: > > + v4l2_ctrl_handler_free(handler); > > + > > + return ret; > > +} > > + > > +static int ov02a10_check_sensor_id(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + u16 id; > > + u8 pid = 0; > > + u8 ver = 0; > > + int ret; > > + > > + /* Check sensor revision */ > > + ret = ov02a10_read_reg(ov02a10, OV02A10_REG_CHIP_ID_H, &pid); > > + if (ret) > > + return ret; > > + > > + ret = ov02a10_read_reg(ov02a10, OV02A10_REG_CHIP_ID_L, &ver); > > + if (ret) > > + return ret; > > + > > + id = OV02A10_ID(pid, ver); > > + if (id != CHIP_ID) { > > + dev_err(&client->dev, "Unexpected sensor id(%04x)\n", id); > > + return ret; > > + } > > + > > + dev_info(&client->dev, "Detected OV%04X sensor\n", id); > > + > > + return 0; > > +} > > + > > +static int ov02a10_configure_regulators(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + unsigned int i; > > + > > + for (i = 0; i < OV02A10_NUM_SUPPLIES; i++) > > + ov02a10->supplies[i].supply = ov02a10_supply_names[i]; > > + > > + return devm_regulator_bulk_get(&client->dev, > > + OV02A10_NUM_SUPPLIES, > > + ov02a10->supplies); > > +} > > + > > +static int ov02a10_probe(struct i2c_client *client) > > +{ > > + struct device *dev = &client->dev; > > + struct ov02a10 *ov02a10; > > + u32 rotation; > > + u32 xclk_freq; > > + int ret; > > + > > + ov02a10 = devm_kzalloc(dev, sizeof(*ov02a10), GFP_KERNEL); > > + if (!ov02a10) > > + return -ENOMEM; > > + > > + v4l2_i2c_subdev_init(&ov02a10->subdev, client, &ov02a10_subdev_ops); > > + ov02a10->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10; > > + > > + /* Optional indication of physical rotation of sensor */ > > + ret = fwnode_property_read_u32(dev_fwnode(dev), "rotation", > > + &rotation); > > + if (!ret) { > > + switch (rotation) { > > + case 180: > > + ov02a10->upside_down = true; > > + ov02a10->fmt.code = MEDIA_BUS_FMT_SRGGB10_1X10; > > + break; > > + case 0: > > + break; > > + default: > > + dev_warn(dev, "%u degrees rotation is not supported, ignoring...\n", > > + rotation); > > + } > > + } > > + > > Please also check that the link frequencies in DT match with what the > driver expects. See e.g. drivers/media/i2c/ov8856.c driver for an example. > I would have a try and set one check rule for link frequencies. > > + /* Get system clock (xvclk) */ > > + ov02a10->xvclk = devm_clk_get(dev, "xvclk"); > > + if (IS_ERR(ov02a10->xvclk)) { > > + dev_err(dev, "Failed to get xvclk\n"); > > + return -EINVAL; > > + } > > + > > + ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq); > > + if (ret) { > > + dev_err(dev, "Failed to get xclk frequency\n"); > > + return ret; > > + } > > + > > + /* External clock must be 24MHz, allow 1% tolerance */ > > + if (xclk_freq < 23760000 || xclk_freq > 24240000) { > > + dev_err(dev, "external clock frequency %u is not supported\n", > > + xclk_freq); > > + return -EINVAL; > > + } > > + dev_dbg(dev, "external clock frequency %u\n", xclk_freq); > > + > > + ret = clk_set_rate(ov02a10->xvclk, xclk_freq); > > + if (ret) { > > + dev_err(dev, "Failed to set xvclk frequency (24MHz)\n"); > > + return ret; > > + } > > + > > + ov02a10->powerdown_gpio = devm_gpiod_get(dev, "powerdown", > > + GPIOD_OUT_LOW); > > + if (IS_ERR(ov02a10->powerdown_gpio)) { > > + dev_err(dev, "Failed to get powerdown-gpios\n"); > > + return -EINVAL; > > + } > > + > > + ov02a10->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); > > + if (IS_ERR(ov02a10->reset_gpio)) { > > + dev_err(dev, "Failed to get reset-gpios\n"); > > + return -EINVAL; > > + } > > + > > + ret = ov02a10_configure_regulators(ov02a10); > > + if (ret) { > > + dev_err(dev, "Failed to get power regulators\n"); > > + return ret; > > + } > > + > > + mutex_init(&ov02a10->mutex); > > + ov02a10->cur_mode = &supported_modes[0]; > > + ret = ov02a10_initialize_controls(ov02a10); > > + if (ret) { > > + dev_err(dev, "Failed to initialize controls\n"); > > + goto err_destroy_mutex; > > + } > > + > > + ret = __ov02a10_power_on(ov02a10); > > + if (ret) > > + goto err_free_handler; > > + > > + ret = ov02a10_check_sensor_id(ov02a10); > > + if (ret) > > + goto err_power_off; > > + > > + ov02a10->subdev.internal_ops = &ov02a10_internal_ops; > > + ov02a10->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; > > + ov02a10->subdev.entity.ops = &ov02a10_subdev_entity_ops; > > + ov02a10->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR; > > + ov02a10->pad.flags = MEDIA_PAD_FL_SOURCE; > > + ret = media_entity_pads_init(&ov02a10->subdev.entity, 1, &ov02a10->pad); > > + if (ret < 0) { > > + dev_err(dev, "failed to init entity pads: %d", ret); > > + goto err_power_off; > > + } > > + > > + ret = v4l2_async_register_subdev(&ov02a10->subdev); > > + if (ret) { > > + dev_err(dev, "failed to register V4L2 subdev: %d", > > + ret); > > + goto err_clean_entity; > > + } > > + > > + pm_runtime_set_active(dev); > > + pm_runtime_enable(dev); > > + pm_runtime_idle(dev); > > + > > + dev_info(dev, "ov02a10 probe --\n"); > > This isn't very informative. The driver already prints errors when probing > fails and otherwise it succeeds. Please remove. > This would be removed in next release. > > + return 0; > > + > > +err_clean_entity: > > + media_entity_cleanup(&ov02a10->subdev.entity); > > +err_power_off: > > + __ov02a10_power_off(ov02a10); > > +err_free_handler: > > + v4l2_ctrl_handler_free(ov02a10->subdev.ctrl_handler); > > +err_destroy_mutex: > > + mutex_destroy(&ov02a10->mutex); > > + > > + return ret; > > +} > > + > > +static int ov02a10_remove(struct i2c_client *client) > > +{ > > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + v4l2_async_unregister_subdev(sd); > > + media_entity_cleanup(&sd->entity); > > + v4l2_ctrl_handler_free(sd->ctrl_handler); > > + pm_runtime_disable(&client->dev); > > + if (!pm_runtime_status_suspended(&client->dev)) > > + __ov02a10_power_off(ov02a10); > > + pm_runtime_set_suspended(&client->dev); > > + mutex_destroy(&ov02a10->mutex); > > + > > + return 0; > > +} > > + > > +#if IS_ENABLED(CONFIG_OF) > > +static const struct of_device_id ov02a10_of_match[] = { > > + { .compatible = "ovti,ov02a10" }, > > + {}, > > +}; > > +MODULE_DEVICE_TABLE(of, ov02a10_of_match); > > +#endif > > + > > +static struct i2c_driver ov02a10_i2c_driver = { > > + .driver = { > > + .name = "ov02a10", > > + .pm = &ov02a10_pm_ops, > > + .of_match_table = ov02a10_of_match, > > + }, > > + .probe_new = &ov02a10_probe, > > + .remove = &ov02a10_remove, > > +}; > > + > > +module_i2c_driver(ov02a10_i2c_driver); > > + > > +MODULE_AUTHOR("Dongchun Zhu "); > > +MODULE_DESCRIPTION("OmniVision OV02A10 sensor driver"); > > +MODULE_LICENSE("GPL v2"); > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EDC43C3A5A5 for ; 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bh=Ku99Vn23ADPBGkEbHei52ipQt1sahoAQOhMBC0S6xXo=; b=CGFTiINtV5dN0t 9MzaCjDV2EotRfj4I6uj+xlcRZgPBhJQVH82xvpVH3aMkfWzaqK00+ydr5h+obbVgSrKYV4TMwrl7 R8eHmwSB0vTbSfXD9Ro6GiccWDzxIRlzJJo+SgULMEbr2+P2Jrt5/GfnhpLg7jenrpMWhUK8U3/eS EfJ6ZLPLSqbS0fzdpJDp7TXJnByOhA2BjZ+oskwMhZVhcBFW5oVoi8wU/p68Ty5C54HORO8K9B3ao ezrhYt+1K2/uqdKJEf/dkCDGW7JjE4KEWi8AjE/jruT9fhZMScZJCchoxfyiS/ZuwvcSomUD6hu8g daeF6q7FvCxg1TFpjvng==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i5oGc-0007fW-9t; Thu, 05 Sep 2019 09:41:26 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i5oGW-0007dl-5c; Thu, 05 Sep 2019 09:41:23 +0000 X-UUID: fd31bd230ec247308e251f6cf88b4525-20190905 X-UUID: fd31bd230ec247308e251f6cf88b4525-20190905 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 2071271373; Thu, 05 Sep 2019 01:41:09 -0800 Received: from MTKMBS31N2.mediatek.inc (172.27.4.87) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 5 Sep 2019 02:41:07 -0700 Received: from MTKCAS36.mediatek.inc (172.27.4.186) by MTKMBS31N2.mediatek.inc (172.27.4.87) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 5 Sep 2019 17:41:05 +0800 Received: from [10.17.3.153] (172.27.4.253) by MTKCAS36.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 5 Sep 2019 17:41:03 +0800 Message-ID: <1567676465.21623.100.camel@mhfsdcap03> Subject: Re: [V3, 2/2] media: i2c: Add Omnivision OV02A10 camera sensor driver From: Dongchun Zhu To: Sakari Ailus Date: Thu, 5 Sep 2019 17:41:05 +0800 In-Reply-To: <20190819083009.GC6133@paasikivi.fi.intel.com> References: <20190819034331.13098-1-dongchun.zhu@mediatek.com> <20190819034331.13098-3-dongchun.zhu@mediatek.com> <20190819083009.GC6133@paasikivi.fi.intel.com> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: 36B00490CA9840AAEB2B1C185E6B5010A0B31831FDA35477F6AACC9406560B6F2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190905_024120_240115_2FA072A1 X-CRM114-Status: GOOD ( 23.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, drinkcat@chromium.org, srv_heupstream@mediatek.com, shengnan.wang@mediatek.com, tfiga@chromium.org, louis.kuo@mediatek.com, sj.huang@mediatek.com, robh+dt@kernel.org, linux-mediatek@lists.infradead.org, matthias.bgg@gmail.com, bingbu.cao@intel.com, mchehab@kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Sakari, On Mon, 2019-08-19 at 11:30 +0300, Sakari Ailus wrote: > Hi Dongchun, > > Thanks for the update. > > On Mon, Aug 19, 2019 at 11:43:31AM +0800, dongchun.zhu@mediatek.com wrote: > > From: Dongchun Zhu > > > > This patch adds a V4L2 sub-device driver for OV02A10 image sensor. > > The OV02A10 is a 1/5" CMOS sensor from Omnivision, > > which supports output format: 10-bit Raw. > > The OV02A10 has a single MIPI lane interface and use the I2C bus > > for control and the CSI-2 bus for data. > > > > Signed-off-by: Dongchun Zhu > > --- > > MAINTAINERS | 1 + > > drivers/media/i2c/Kconfig | 11 + > > drivers/media/i2c/Makefile | 1 + > > drivers/media/i2c/ov02a10.c | 1018 +++++++++++++++++++++++++++++++++++++++++++ > > 4 files changed, 1031 insertions(+) > > create mode 100644 drivers/media/i2c/ov02a10.c > > > > diff --git a/MAINTAINERS b/MAINTAINERS > > index 41734fb..4b714a2 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -11821,6 +11821,7 @@ M: Dongchun Zhu > > L: linux-media@vger.kernel.org > > T: git git://linuxtv.org/media_tree.git > > S: Maintained > > +F: drivers/media/i2c/ov02a10.c > > F: Documentation/devicetree/bindings/media/i2c/ov02a10.txt > > > > OMNIVISION OV2680 SENSOR DRIVER > > diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig > > index 79ce9ec..d063a82 100644 > > --- a/drivers/media/i2c/Kconfig > > +++ b/drivers/media/i2c/Kconfig > > @@ -617,6 +617,17 @@ config VIDEO_IMX355 > > To compile this driver as a module, choose M here: the > > module will be called imx355. > > > > +config VIDEO_OV02A10 > > + tristate "OmniVision OV02A10 sensor support" > > + depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API > > + depends on MEDIA_CAMERA_SUPPORT > > + help > > + This is a Video4Linux2 sensor driver for the OmniVision > > + OV02A10 camera. > > + > > + To compile this driver as a module, choose M here: the > > + module will be called ov02a10. > > + > > 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 fd4ea86..f34a7ac 100644 > > --- a/drivers/media/i2c/Makefile > > +++ b/drivers/media/i2c/Makefile > > @@ -71,6 +71,7 @@ obj-$(CONFIG_VIDEO_OV5645) += ov5645.o > > obj-$(CONFIG_VIDEO_OV5647) += ov5647.o > > obj-$(CONFIG_VIDEO_OV5670) += ov5670.o > > obj-$(CONFIG_VIDEO_OV5695) += ov5695.o > > +obj-$(CONFIG_VIDEO_OV02A10) += ov02a10.o > > obj-$(CONFIG_VIDEO_OV6650) += ov6650.o > > obj-$(CONFIG_VIDEO_OV7251) += ov7251.o > > obj-$(CONFIG_VIDEO_OV7640) += ov7640.o > > diff --git a/drivers/media/i2c/ov02a10.c b/drivers/media/i2c/ov02a10.c > > new file mode 100644 > > index 0000000..ff5460a > > --- /dev/null > > +++ b/drivers/media/i2c/ov02a10.c > > @@ -0,0 +1,1018 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * Copyright (c) 2018 MediaTek Inc. > > + */ > > + > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > + > > +#define CHIP_ID 0x2509 > > +#define OV02A10_REG_CHIP_ID_H 0x02 > > +#define OV02A10_REG_CHIP_ID_L 0x03 > > +#define OV02A10_ID(_msb, _lsb) ((_msb) << 8 | (_lsb)) > > + > > +/* Bit[1] vertical upside down */ > > +/* Bit[0] horizontal mirror */ > > +#define REG_MIRROR_FLIP_CONTROL 0x3f > > + > > +/* Orientation */ > > +#define REG_CONFIG_MIRROR_FLIP 0x03 > > + > > +#define REG_PAGE_SWITCH 0xfd > > +#define REG_GLOBAL_EFFECTIVE 0x01 > > +#define REG_ENABLE BIT(0) > > + > > +#define REG_SC_CTRL_MODE 0xac > > +#define SC_CTRL_MODE_STANDBY 0x00 > > +#define SC_CTRL_MODE_STREAMING 0x01 > > + > > +#define OV02A10_REG_EXPOSURE_H 0x03 > > +#define OV02A10_REG_EXPOSURE_L 0x04 > > +#define OV02A10_EXPOSURE_MIN 4 > > +#define OV02A10_EXPOSURE_STEP 1 > > + > > +#define OV02A10_REG_VTS_H 0x05 > > +#define OV02A10_REG_VTS_L 0x06 > > +#define OV02A10_VTS_MAX 0x209f > > +#define OV02A10_VTS_MIN 0x04cf > > +#define OV02A10_BASIC_LINE 1224 > > + > > +#define OV02A10_REG_GAIN 0x24 > > +#define OV02A10_GAIN_MIN 0x10 > > +#define OV02A10_GAIN_MAX 0xf8 > > +#define OV02A10_GAIN_STEP 0x01 > > +#define OV02A10_GAIN_DEFAULT 0x40 > > + > > +#define REG_NULL 0xff > > + > > +#define OV02A10_LANES 1 > > +#define OV02A10_BITS_PER_SAMPLE 10 > > + > > +static const char * const ov02a10_supply_names[] = { > > + "dovdd", /* Digital I/O power */ > > + "avdd", /* Analog power */ > > + "dvdd", /* Digital core power */ > > +}; > > + > > +#define OV02A10_NUM_SUPPLIES ARRAY_SIZE(ov02a10_supply_names) > > + > > +struct regval { > > + u16 addr; > > + u8 val; > > +}; > > + > > +struct ov02a10_mode { > > + u32 width; > > + u32 height; > > + u32 exp_def; > > + u32 hts_def; > > + u32 vts_def; > > + const struct regval *reg_list; > > +}; > > + > > +struct ov02a10 { > > + struct clk *xvclk; > > + struct gpio_desc *powerdown_gpio; > > + struct gpio_desc *reset_gpio; > > + struct regulator_bulk_data supplies[OV02A10_NUM_SUPPLIES]; > > + > > + bool streaming; > > + bool upside_down; > > + > > + /* > > + * Serialize control access, get/set format, get selection > > + * and start streaming. > > + */ > > + struct mutex mutex; > > + struct v4l2_subdev subdev; > > + struct media_pad pad; > > + struct v4l2_ctrl *anal_gain; > > + struct v4l2_ctrl *exposure; > > + struct v4l2_ctrl *hblank; > > + struct v4l2_ctrl *vblank; > > + struct v4l2_ctrl *hflip; > > + struct v4l2_ctrl *vflip; > > + struct v4l2_ctrl *test_pattern; > > + struct v4l2_mbus_framefmt fmt; > > + struct v4l2_ctrl_handler ctrl_handler; > > + > > + const struct ov02a10_mode *cur_mode; > > +}; > > + > > +#define to_ov02a10(sd) container_of(sd, struct ov02a10, subdev) > > + > > +static inline void msleep_range(unsigned int delay_base) > > +{ > > + usleep_range(delay_base * 1000, delay_base * 1000 + 500); > > +} > > + > > +/* MIPI color bar enable output */ > > +static const struct regval ov02a10_test_pattern_enable_regs[] = { > > + {0xfd, 0x01}, > > + {0x0d, 0x00}, > > + {0xb6, 0x01}, > > + {0x01, 0x01}, > > + {0xfd, 0x01}, > > + {0xac, 0x01}, > > + {REG_NULL, 0x00} > > +}; > > + > > +/* MIPI color bar disable output */ > > +static const struct regval ov02a10_test_pattern_disable_regs[] = { > > + {0xfd, 0x01}, > > + {0x0d, 0x00}, > > + {0xb6, 0x00}, > > + {0x01, 0x01}, > > + {0xfd, 0x01}, > > + {0xac, 0x01}, > > + {REG_NULL, 0x00} > > +}; > > + > > +/* > > + * xvclk 24Mhz > > + * pclk 39Mhz > > + * linelength 934(0x3a6) > > + * framelength 1390(0x56e) > > + * grabwindow_width 1600 > > + * grabwindow_height 1200 > > + * max_framerate 30fps > > + * mipi_datarate per lane 780Mbps > > + */ > > +static const struct regval ov02a10_1600x1200_regs[] = { > > + {0xfd, 0x01}, > > + {0xac, 0x00}, > > + {0xfd, 0x00}, > > + {0x2f, 0x29}, > > + {0x34, 0x00}, > > + {0x35, 0x21}, > > + {0x30, 0x15}, > > + {0x33, 0x01}, > > + {0xfd, 0x01}, > > + {0x44, 0x00}, > > + {0x2a, 0x4c}, > > + {0x2b, 0x1e}, > > + {0x2c, 0x60}, > > + {0x25, 0x11}, > > + {0x03, 0x01}, > > + {0x04, 0xae}, > > + {0x09, 0x00}, > > + {0x0a, 0x02}, > > + {0x06, 0xa6}, > > + {0x31, 0x00}, > > + {0x24, 0x40}, > > + {0x01, 0x01}, > > + {0xfb, 0x73}, > > + {0xfd, 0x01}, > > + {0x16, 0x04}, > > + {0x1c, 0x09}, > > + {0x21, 0x42}, > > + {0x12, 0x04}, > > + {0x13, 0x10}, > > + {0x11, 0x40}, > > + {0x33, 0x81}, > > + {0xd0, 0x00}, > > + {0xd1, 0x01}, > > + {0xd2, 0x00}, > > + {0x50, 0x10}, > > + {0x51, 0x23}, > > + {0x52, 0x20}, > > + {0x53, 0x10}, > > + {0x54, 0x02}, > > + {0x55, 0x20}, > > + {0x56, 0x02}, > > + {0x58, 0x48}, > > + {0x5d, 0x15}, > > + {0x5e, 0x05}, > > + {0x66, 0x66}, > > + {0x68, 0x68}, > > + {0x6b, 0x00}, > > + {0x6c, 0x00}, > > + {0x6f, 0x40}, > > + {0x70, 0x40}, > > + {0x71, 0x0a}, > > + {0x72, 0xf0}, > > + {0x73, 0x10}, > > + {0x75, 0x80}, > > + {0x76, 0x10}, > > + {0x84, 0x00}, > > + {0x85, 0x10}, > > + {0x86, 0x10}, > > + {0x87, 0x00}, > > + {0x8a, 0x22}, > > + {0x8b, 0x22}, > > + {0x19, 0xf1}, > > + {0x29, 0x01}, > > + {0xfd, 0x01}, > > + {0x9d, 0xd6}, > > + {0xa0, 0x29}, > > + {0xa1, 0x03}, > > + {0xad, 0x62}, > > + {0xae, 0x00}, > > + {0xaf, 0x85}, > > + {0xb1, 0x01}, > > + {0x8e, 0x06}, > > + {0x8f, 0x40}, > > + {0x90, 0x04}, > > + {0x91, 0xb0}, > > + {0x45, 0x01}, > > + {0x46, 0x00}, > > + {0x47, 0x6c}, > > + {0x48, 0x03}, > > + {0x49, 0x8b}, > > + {0x4a, 0x00}, > > + {0x4b, 0x07}, > > + {0x4c, 0x04}, > > + {0x4d, 0xb7}, > > + {0xf0, 0x40}, > > + {0xf1, 0x40}, > > + {0xf2, 0x40}, > > + {0xf3, 0x40}, > > + {0x3f, 0x00}, > > + {0xfd, 0x01}, > > + {0x05, 0x00}, > > + {0x06, 0xa6}, > > + {0xfd, 0x01}, > > + {REG_NULL, 0x00} > > +}; > > + > > +#define OV02A10_LINK_FREQ_390MHZ 390000000 > > +static const s64 link_freq_menu_items[] = { > > + OV02A10_LINK_FREQ_390MHZ > > +}; > > + > > +static const char * const ov02a10_test_pattern_menu[] = { > > + "Disabled", > > + "Color Bar", > > +}; > > + > > +static const struct ov02a10_mode supported_modes[] = { > > + { > > + .width = 1600, > > + .height = 1200, > > + .exp_def = 0x01ae, > > + .hts_def = 0x03a6, > > + .vts_def = 0x056e, > > + .reg_list = ov02a10_1600x1200_regs, > > + }, > > +}; > > + > > +/* Write a register */ > > +static int ov02a10_write_reg(struct ov02a10 *ov02a10, u8 addr, u8 val) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + u8 buf[2] = {addr, val}; > > + int ret; > > + > > + ret = i2c_master_send(client, buf, 2); > > + > > + if (ret != 2) { > > + dev_err(&client->dev, "%s: error: reg=%x, val=%x\n", > > + __func__, addr, val); > > + return -EIO; > > + } > > + > > + return 0; > > +} > > + > > +static int ov02a10_write_array(struct ov02a10 *ov02a10, > > + const struct regval *regs) > > +{ > > + u32 i; > > unsigned int, please. > Fixed in next release. > > + int ret; > > + > > + for (i = 0; regs[i].addr != REG_NULL; i++) { > > + ret = ov02a10_write_reg(ov02a10, regs[i].addr, regs[i].val); > > + if (ret < 0) > > + return ret; > > + } > > + > > + return 0; > > +} > > + > > +/* Read a register */ > > +static int ov02a10_read_reg(struct ov02a10 *ov02a10, u8 reg, u8 *val) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + u8 data = reg; > > + struct i2c_msg msg = { > > + .addr = client->addr, > > + .flags = 0, > > + .len = 1, > > + .buf = &data, > > + }; > > + int ret; > > + > > + ret = i2c_transfer(client->adapter, &msg, 1); > > + if (ret < 0) > > + goto err_wr; > > + > > + msg.flags = I2C_M_RD; > > + ret = i2c_transfer(client->adapter, &msg, 1); > > + if (ret < 0) > > + goto err_rd; > > + > > + *val = data; > > + return 0; > > + > > +err_rd: > > + dev_err(&client->dev, "i2c_transfer --I2C_M_RD failed\n"); > > +err_wr: > > + dev_err(&client->dev, "read error: reg=0x%02x: %d\n", reg, ret); > > + return ret; > > +} > > + > > +static void ov02a10_fill_fmt(const struct ov02a10_mode *mode, > > + struct v4l2_mbus_framefmt *fmt) > > +{ > > + fmt->width = mode->width; > > + fmt->height = mode->height; > > + fmt->field = V4L2_FIELD_NONE; > > +} > > + > > +static int ov02a10_set_fmt(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_format *fmt) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; > > + > > + mutex_lock(&ov02a10->mutex); > > + > > + if (ov02a10->streaming) { > > + mutex_unlock(&ov02a10->mutex); > > + return -EBUSY; > > + } > > + > > + /* Only one sensor mode supported */ > > + mbus_fmt->code = ov02a10->fmt.code; > > + ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); > > + ov02a10->fmt = fmt->format; > > + > > + mutex_unlock(&ov02a10->mutex); > > + > > + return 0; > > +} > > + > > +static int ov02a10_get_fmt(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_format *fmt) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; > > + > > + mutex_lock(&ov02a10->mutex); > > + > > + fmt->format = ov02a10->fmt; > > + mbus_fmt->code = ov02a10->fmt.code; > > + ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); > > + > > + mutex_unlock(&ov02a10->mutex); > > + > > + return 0; > > +} > > + > > +static int ov02a10_enum_mbus_code(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_mbus_code_enum *code) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + if (code->index >= ARRAY_SIZE(supported_modes) || !(code->index)) > > This doesn't make sense. The supported modes, should more be added in the > future, are presumably using the same mbus code. If you only have one, then > non-zero code->index would result in -EINVAL (and not zero code->index). > Thanks for kind reminder. !(code->index) would be removed in next release. > > + return -EINVAL; > > + > > + code->code = ov02a10->fmt.code; > > + > > + return 0; > > +} > > + > > +static int ov02a10_enum_frame_sizes(struct v4l2_subdev *sd, > > + struct v4l2_subdev_pad_config *cfg, > > + struct v4l2_subdev_frame_size_enum *fse) > > +{ > > + if (fse->index >= ARRAY_SIZE(supported_modes) || !(fse->index)) > > + return -EINVAL; > > + > > + fse->min_width = supported_modes[fse->index].width; > > + fse->max_width = supported_modes[fse->index].width; > > + fse->max_height = supported_modes[fse->index].height; > > + fse->min_height = supported_modes[fse->index].height; > > + > > + return 0; > > +} > > + > > +static int __ov02a10_power_on(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + struct device *dev = &client->dev; > > + int ret; > > + > > + ret = clk_prepare_enable(ov02a10->xvclk); > > + if (ret < 0) { > > + dev_err(dev, "Failed to enable xvclk\n"); > > + return ret; > > + } > > + > > + /* Note: set 0 is high, set 1 is low */ > > + gpiod_set_value_cansleep(ov02a10->reset_gpio, 1); > > + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 0); > > + > > + ret = regulator_bulk_enable(OV02A10_NUM_SUPPLIES, ov02a10->supplies); > > + if (ret < 0) { > > + dev_err(dev, "Failed to enable regulators\n"); > > + goto disable_clk; > > + } > > + msleep_range(7); > > This has some potential of clashing with more generic functions in the > future. Please use usleep_range directly, or msleep. > Did you mean using usleep_range(7*1000, 8*1000), as used in patch v1? https://patchwork.kernel.org/patch/10957225/ > > + > > + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 1); > > + msleep_range(10); > > + > > + gpiod_set_value_cansleep(ov02a10->reset_gpio, 0); > > + msleep_range(10); > > + > > + return 0; > > + > > +disable_clk: > > + clk_disable_unprepare(ov02a10->xvclk); > > + > > + return ret; > > +} > > + > > +static void __ov02a10_power_off(struct ov02a10 *ov02a10) > > +{ > > + clk_disable_unprepare(ov02a10->xvclk); > > + gpiod_set_value_cansleep(ov02a10->reset_gpio, 1); > > + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 1); > > + regulator_bulk_disable(OV02A10_NUM_SUPPLIES, ov02a10->supplies); > > +} > > + > > +static int __ov02a10_start_stream(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + int ret; > > + > > + /* Apply default values of current mode */ > > + ret = ov02a10_write_array(ov02a10, ov02a10->cur_mode->reg_list); > > + if (ret) > > + return ret; > > + > > + /* Apply customized values from user */ > > + ret = __v4l2_ctrl_handler_setup(ov02a10->subdev.ctrl_handler); > > + if (ret) > > + return ret; > > + > > + /* Set orientation to 180 degree */ > > + if (ov02a10->upside_down) { > > + ret = ov02a10_write_reg(ov02a10, REG_MIRROR_FLIP_CONTROL, > > + REG_CONFIG_MIRROR_FLIP); > > + if (ret) { > > + dev_err(&client->dev, "%s failed to set orientation\n", > > + __func__); > > + return ret; > > + } > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + } > > + > > + /* Set stream on register */ > > + return ov02a10_write_reg(ov02a10, > > + REG_SC_CTRL_MODE, SC_CTRL_MODE_STREAMING); > > +} > > + > > +static int __ov02a10_stop_stream(struct ov02a10 *ov02a10) > > +{ > > + return ov02a10_write_reg(ov02a10, > > + REG_SC_CTRL_MODE, SC_CTRL_MODE_STANDBY); > > +} > > + > > +static int ov02a10_entity_init_cfg(struct v4l2_subdev *subdev, > > + struct v4l2_subdev_pad_config *cfg) > > +{ > > + struct v4l2_subdev_format fmt = { 0 }; > > + > > + fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; > > + fmt.format.width = 1600; > > + fmt.format.height = 1200; > > + > > + ov02a10_set_fmt(subdev, cfg, &fmt); > > + > > + return 0; > > +} > > + > > +static int ov02a10_s_stream(struct v4l2_subdev *sd, int on) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + int ret = 0; > > + > > + mutex_lock(&ov02a10->mutex); > > + > > + if (ov02a10->streaming == on) > > + goto unlock_and_return; > > + > > + if (on) { > > + ret = pm_runtime_get_sync(&client->dev); > > + if (ret < 0) { > > + pm_runtime_put_noidle(&client->dev); > > + goto unlock_and_return; > > + } > > + > > + ret = __ov02a10_start_stream(ov02a10); > > + if (ret) { > > + __ov02a10_stop_stream(ov02a10); > > + ov02a10->streaming = !on; > > + goto err_rpm_put; > > + } > > + } else { > > + __ov02a10_stop_stream(ov02a10); > > + pm_runtime_put(&client->dev); > > + } > > + > > + ov02a10->streaming = on; > > + mutex_unlock(&ov02a10->mutex); > > + > > + return ret; > > + > > +err_rpm_put: > > + pm_runtime_put(&client->dev); > > +unlock_and_return: > > + mutex_unlock(&ov02a10->mutex); > > + > > + return ret; > > +} > > + > > +static int ov02a10_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) > > +{ > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + struct v4l2_mbus_framefmt *try_fmt = v4l2_subdev_get_try_format(sd, > > + fh->pad, > > + 0); > > + > > + mutex_lock(&ov02a10->mutex); > > + /* Initialize try_fmt */ > > + try_fmt->code = ov02a10->fmt.code; > > + ov02a10_fill_fmt(&supported_modes[0], try_fmt); > > + > > + mutex_unlock(&ov02a10->mutex); > > No need for the mutex: the supported values are static and there is no > parallel access to try_fmt. > > Btw. you don't need to do this here as you have init_cfg implemented, i.e. > you can omit the open callback. > Understood. mutex here would be removed in next release. > > + > > + return 0; > > +} > > + > > +static int __maybe_unused ov02a10_runtime_resume(struct device *dev) > > +{ > > + struct i2c_client *client = to_i2c_client(dev); > > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + return __ov02a10_power_on(ov02a10); > > +} > > + > > +static int __maybe_unused ov02a10_runtime_suspend(struct device *dev) > > +{ > > + struct i2c_client *client = to_i2c_client(dev); > > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + __ov02a10_power_off(ov02a10); > > + > > + return 0; > > +} > > + > > +static const struct dev_pm_ops ov02a10_pm_ops = { > > + SET_RUNTIME_PM_OPS(ov02a10_runtime_suspend, > > + ov02a10_runtime_resume, NULL) > > +}; > > + > > +static int ov02a10_set_test_pattern(struct ov02a10 *ov02a10, s32 value) > > +{ > > + if (value) > > + return ov02a10_write_array(ov02a10, > > + ov02a10_test_pattern_enable_regs); > > + > > + return ov02a10_write_array(ov02a10, > > + ov02a10_test_pattern_disable_regs); > > Fits on previous line. > Sorry for the typo. Fixed in next release. > > +} > > + > > +static int ov02a10_set_ctrl(struct v4l2_ctrl *ctrl) > > +{ > > + struct ov02a10 *ov02a10 = container_of(ctrl->handler, > > + struct ov02a10, ctrl_handler); > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + s64 max_expo; > > + int ret; > > + > > + /* Propagate change of current control to all related controls */ > > + if (ctrl->id == V4L2_CID_VBLANK) { > > + /* Update max exposure while meeting expected vblanking */ > > + max_expo = ov02a10->cur_mode->height + ctrl->val - 4; > > + __v4l2_ctrl_modify_range(ov02a10->exposure, > > + ov02a10->exposure->minimum, max_expo, > > + ov02a10->exposure->step, > > + ov02a10->exposure->default_value); > > + } > > + > > + /* 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_EXPOSURE: > > + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_EXPOSURE_H, > > + ((ctrl->val >> 8) & 0xFF)); > > + if (!ret) { > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_EXPOSURE_L, > > + (ctrl->val & 0xFF)); > > + if (ret < 0) > > + return ret; > > + } > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + break; > > + case V4L2_CID_ANALOGUE_GAIN: > > + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_GAIN, > > + (ctrl->val & 0xFF)); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + break; > > + case V4L2_CID_VBLANK: > > + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_VTS_H, > > + (((ctrl->val + > > + ov02a10->cur_mode->height - > > + OV02A10_BASIC_LINE) >> 8) > > + & 0xFF)); > > + if (!ret) { > > + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_VTS_L, > > + ((ctrl->val + > > + ov02a10->cur_mode->height - > > + OV02A10_BASIC_LINE) & 0xFF)); > > + if (ret < 0) > > + return ret; > > + } > > + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, > > + REG_ENABLE); > > + if (ret < 0) > > + return ret; > > + break; > > + case V4L2_CID_TEST_PATTERN: > > + ret = ov02a10_set_test_pattern(ov02a10, ctrl->val); > > + if (ret < 0) > > + return ret; > > + break; > > + default: > > + dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n", > > + __func__, ctrl->id, ctrl->val); > > + ret = -EINVAL; > > + break; > > + }; > > + > > + pm_runtime_put(&client->dev); > > + > > + return ret; > > +} > > + > > +static const struct v4l2_subdev_video_ops ov02a10_video_ops = { > > + .s_stream = ov02a10_s_stream, > > +}; > > + > > +static const struct v4l2_subdev_pad_ops ov02a10_pad_ops = { > > + .init_cfg = ov02a10_entity_init_cfg, > > + .enum_mbus_code = ov02a10_enum_mbus_code, > > + .enum_frame_size = ov02a10_enum_frame_sizes, > > + .get_fmt = ov02a10_get_fmt, > > + .set_fmt = ov02a10_set_fmt, > > +}; > > + > > +static const struct v4l2_subdev_ops ov02a10_subdev_ops = { > > + .video = &ov02a10_video_ops, > > + .pad = &ov02a10_pad_ops, > > +}; > > + > > +static const struct media_entity_operations ov02a10_subdev_entity_ops = { > > + .link_validate = v4l2_subdev_link_validate, > > +}; > > + > > +static const struct v4l2_subdev_internal_ops ov02a10_internal_ops = { > > + .open = ov02a10_open, > > +}; > > + > > +static const struct v4l2_ctrl_ops ov02a10_ctrl_ops = { > > + .s_ctrl = ov02a10_set_ctrl, > > +}; > > + > > +static int ov02a10_initialize_controls(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + const struct ov02a10_mode *mode; > > + struct v4l2_ctrl_handler *handler; > > + struct v4l2_ctrl *ctrl; > > + u64 exposure_max; > > + u32 pixel_rate, h_blank; > > + int ret; > > + > > + handler = &ov02a10->ctrl_handler; > > + mode = ov02a10->cur_mode; > > + ret = v4l2_ctrl_handler_init(handler, 10); > > + if (ret) > > + return ret; > > An extra newline here, please. > Sorry for the typo. Fixed in next release. > > + handler->lock = &ov02a10->mutex; > > + > > + ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ, > > + 0, 0, link_freq_menu_items); > > + if (ctrl) > > + ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; > > + > > + pixel_rate = (link_freq_menu_items[0] * 2 * OV02A10_LANES) / > > + OV02A10_BITS_PER_SAMPLE; > > Please use do_div(). The values are static so the compiler may not emit the > instructions for division but better be safe than sorry. > Fixed in next release. > > + v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, > > + 0, pixel_rate, 1, pixel_rate); > > + > > + h_blank = mode->hts_def - mode->width; > > + ov02a10->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, > > + h_blank, h_blank, 1, h_blank); > > + if (ov02a10->hblank) > > + ov02a10->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; > > + > > + ov02a10->vblank = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, > > + V4L2_CID_VBLANK, mode->vts_def - > > + mode->height, > > + OV02A10_VTS_MAX - mode->height, 1, > > + mode->vts_def - mode->height); > > + > > + exposure_max = mode->vts_def - 4; > > + ov02a10->exposure = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, > > + V4L2_CID_EXPOSURE, > > + OV02A10_EXPOSURE_MIN, > > + exposure_max, > > + OV02A10_EXPOSURE_STEP, > > + mode->exp_def); > > + > > + ov02a10->anal_gain = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, > > + V4L2_CID_ANALOGUE_GAIN, > > + OV02A10_GAIN_MIN, > > + OV02A10_GAIN_MAX, > > + OV02A10_GAIN_STEP, > > + OV02A10_GAIN_DEFAULT); > > + > > + ov02a10->test_pattern = > > + v4l2_ctrl_new_std_menu_items(handler, > > Indentation. If some of the arguments slip over 80 I guess we can live with > that. > Got it. Fixed in next release. > > + &ov02a10_ctrl_ops, > > + V4L2_CID_TEST_PATTERN, > > + ARRAY_SIZE(ov02a10_test_pattern_menu) - > > + 1, 0, 0, ov02a10_test_pattern_menu); > > + > > + if (handler->error) { > > + ret = handler->error; > > + dev_err(&client->dev, > > + "Failed to init controls(%d)\n", ret); > > Fits on the previous line. > Fixed in next release. > > + goto err_free_handler; > > + } > > + > > + ov02a10->subdev.ctrl_handler = handler; > > + > > + return 0; > > + > > +err_free_handler: > > + v4l2_ctrl_handler_free(handler); > > + > > + return ret; > > +} > > + > > +static int ov02a10_check_sensor_id(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + u16 id; > > + u8 pid = 0; > > + u8 ver = 0; > > + int ret; > > + > > + /* Check sensor revision */ > > + ret = ov02a10_read_reg(ov02a10, OV02A10_REG_CHIP_ID_H, &pid); > > + if (ret) > > + return ret; > > + > > + ret = ov02a10_read_reg(ov02a10, OV02A10_REG_CHIP_ID_L, &ver); > > + if (ret) > > + return ret; > > + > > + id = OV02A10_ID(pid, ver); > > + if (id != CHIP_ID) { > > + dev_err(&client->dev, "Unexpected sensor id(%04x)\n", id); > > + return ret; > > + } > > + > > + dev_info(&client->dev, "Detected OV%04X sensor\n", id); > > + > > + return 0; > > +} > > + > > +static int ov02a10_configure_regulators(struct ov02a10 *ov02a10) > > +{ > > + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); > > + unsigned int i; > > + > > + for (i = 0; i < OV02A10_NUM_SUPPLIES; i++) > > + ov02a10->supplies[i].supply = ov02a10_supply_names[i]; > > + > > + return devm_regulator_bulk_get(&client->dev, > > + OV02A10_NUM_SUPPLIES, > > + ov02a10->supplies); > > +} > > + > > +static int ov02a10_probe(struct i2c_client *client) > > +{ > > + struct device *dev = &client->dev; > > + struct ov02a10 *ov02a10; > > + u32 rotation; > > + u32 xclk_freq; > > + int ret; > > + > > + ov02a10 = devm_kzalloc(dev, sizeof(*ov02a10), GFP_KERNEL); > > + if (!ov02a10) > > + return -ENOMEM; > > + > > + v4l2_i2c_subdev_init(&ov02a10->subdev, client, &ov02a10_subdev_ops); > > + ov02a10->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10; > > + > > + /* Optional indication of physical rotation of sensor */ > > + ret = fwnode_property_read_u32(dev_fwnode(dev), "rotation", > > + &rotation); > > + if (!ret) { > > + switch (rotation) { > > + case 180: > > + ov02a10->upside_down = true; > > + ov02a10->fmt.code = MEDIA_BUS_FMT_SRGGB10_1X10; > > + break; > > + case 0: > > + break; > > + default: > > + dev_warn(dev, "%u degrees rotation is not supported, ignoring...\n", > > + rotation); > > + } > > + } > > + > > Please also check that the link frequencies in DT match with what the > driver expects. See e.g. drivers/media/i2c/ov8856.c driver for an example. > I would have a try and set one check rule for link frequencies. > > + /* Get system clock (xvclk) */ > > + ov02a10->xvclk = devm_clk_get(dev, "xvclk"); > > + if (IS_ERR(ov02a10->xvclk)) { > > + dev_err(dev, "Failed to get xvclk\n"); > > + return -EINVAL; > > + } > > + > > + ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq); > > + if (ret) { > > + dev_err(dev, "Failed to get xclk frequency\n"); > > + return ret; > > + } > > + > > + /* External clock must be 24MHz, allow 1% tolerance */ > > + if (xclk_freq < 23760000 || xclk_freq > 24240000) { > > + dev_err(dev, "external clock frequency %u is not supported\n", > > + xclk_freq); > > + return -EINVAL; > > + } > > + dev_dbg(dev, "external clock frequency %u\n", xclk_freq); > > + > > + ret = clk_set_rate(ov02a10->xvclk, xclk_freq); > > + if (ret) { > > + dev_err(dev, "Failed to set xvclk frequency (24MHz)\n"); > > + return ret; > > + } > > + > > + ov02a10->powerdown_gpio = devm_gpiod_get(dev, "powerdown", > > + GPIOD_OUT_LOW); > > + if (IS_ERR(ov02a10->powerdown_gpio)) { > > + dev_err(dev, "Failed to get powerdown-gpios\n"); > > + return -EINVAL; > > + } > > + > > + ov02a10->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); > > + if (IS_ERR(ov02a10->reset_gpio)) { > > + dev_err(dev, "Failed to get reset-gpios\n"); > > + return -EINVAL; > > + } > > + > > + ret = ov02a10_configure_regulators(ov02a10); > > + if (ret) { > > + dev_err(dev, "Failed to get power regulators\n"); > > + return ret; > > + } > > + > > + mutex_init(&ov02a10->mutex); > > + ov02a10->cur_mode = &supported_modes[0]; > > + ret = ov02a10_initialize_controls(ov02a10); > > + if (ret) { > > + dev_err(dev, "Failed to initialize controls\n"); > > + goto err_destroy_mutex; > > + } > > + > > + ret = __ov02a10_power_on(ov02a10); > > + if (ret) > > + goto err_free_handler; > > + > > + ret = ov02a10_check_sensor_id(ov02a10); > > + if (ret) > > + goto err_power_off; > > + > > + ov02a10->subdev.internal_ops = &ov02a10_internal_ops; > > + ov02a10->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; > > + ov02a10->subdev.entity.ops = &ov02a10_subdev_entity_ops; > > + ov02a10->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR; > > + ov02a10->pad.flags = MEDIA_PAD_FL_SOURCE; > > + ret = media_entity_pads_init(&ov02a10->subdev.entity, 1, &ov02a10->pad); > > + if (ret < 0) { > > + dev_err(dev, "failed to init entity pads: %d", ret); > > + goto err_power_off; > > + } > > + > > + ret = v4l2_async_register_subdev(&ov02a10->subdev); > > + if (ret) { > > + dev_err(dev, "failed to register V4L2 subdev: %d", > > + ret); > > + goto err_clean_entity; > > + } > > + > > + pm_runtime_set_active(dev); > > + pm_runtime_enable(dev); > > + pm_runtime_idle(dev); > > + > > + dev_info(dev, "ov02a10 probe --\n"); > > This isn't very informative. The driver already prints errors when probing > fails and otherwise it succeeds. Please remove. > This would be removed in next release. > > + return 0; > > + > > +err_clean_entity: > > + media_entity_cleanup(&ov02a10->subdev.entity); > > +err_power_off: > > + __ov02a10_power_off(ov02a10); > > +err_free_handler: > > + v4l2_ctrl_handler_free(ov02a10->subdev.ctrl_handler); > > +err_destroy_mutex: > > + mutex_destroy(&ov02a10->mutex); > > + > > + return ret; > > +} > > + > > +static int ov02a10_remove(struct i2c_client *client) > > +{ > > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > > + struct ov02a10 *ov02a10 = to_ov02a10(sd); > > + > > + v4l2_async_unregister_subdev(sd); > > + media_entity_cleanup(&sd->entity); > > + v4l2_ctrl_handler_free(sd->ctrl_handler); > > + pm_runtime_disable(&client->dev); > > + if (!pm_runtime_status_suspended(&client->dev)) > > + __ov02a10_power_off(ov02a10); > > + pm_runtime_set_suspended(&client->dev); > > + mutex_destroy(&ov02a10->mutex); > > + > > + return 0; > > +} > > + > > +#if IS_ENABLED(CONFIG_OF) > > +static const struct of_device_id ov02a10_of_match[] = { > > + { .compatible = "ovti,ov02a10" }, > > + {}, > > +}; > > +MODULE_DEVICE_TABLE(of, ov02a10_of_match); > > +#endif > > + > > +static struct i2c_driver ov02a10_i2c_driver = { > > + .driver = { > > + .name = "ov02a10", > > + .pm = &ov02a10_pm_ops, > > + .of_match_table = ov02a10_of_match, > > + }, > > + .probe_new = &ov02a10_probe, > > + .remove = &ov02a10_remove, > > +}; > > + > > +module_i2c_driver(ov02a10_i2c_driver); > > + > > +MODULE_AUTHOR("Dongchun Zhu "); > > +MODULE_DESCRIPTION("OmniVision OV02A10 sensor driver"); > > +MODULE_LICENSE("GPL v2"); > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel