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Message-ID: <20230906105826.GQ7971@pendragon.ideasonboard.com>
Date: Wed, 6 Sep 2023 13:58:26 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Paul Elder <paul.elder@...asonboard.com>
Cc: linux-media@...r.kernel.org,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] media: i2c: Add driver for THine THP7312
Hi Paul,
Thank you for the patch.
On Wed, Sep 06, 2023 at 08:31:17AM +0900, Paul Elder wrote:
> Add driver for the THine THP7312 ISP.
>
> Signed-off-by: Paul Elder <paul.elder@...asonboard.com>
> ---
> drivers/media/i2c/Kconfig | 9 +
> drivers/media/i2c/Makefile | 1 +
> drivers/media/i2c/thp7312.c | 1674 +++++++++++++++++++++++++++++++++++
> 3 files changed, 1684 insertions(+)
> create mode 100644 drivers/media/i2c/thp7312.c
>
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index 226454b6a90d..ab7d333f1e43 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -807,6 +807,15 @@ config VIDEO_ST_VGXY61
> This is a Video4Linux2 sensor driver for the ST VGXY61
> camera sensor.
>
> +config VIDEO_THP7312
> + tristate "THP7312 ISP"
> + depends on VIDEO_DEV && I2C && VIDEO_V4L2_SUBDEV_API
> + help
> + Support for THine THP7312 Image Signal Processor
> +
> + To compile this driver as a module, choose M here: the
> + module will be called thp7312.
> +
> source "drivers/media/i2c/ccs/Kconfig"
> source "drivers/media/i2c/et8ek8/Kconfig"
>
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index c743aeb5d1ad..c831c0761aa7 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -123,6 +123,7 @@ obj-$(CONFIG_VIDEO_TDA7432) += tda7432.o
> obj-$(CONFIG_VIDEO_TDA9840) += tda9840.o
> obj-$(CONFIG_VIDEO_TEA6415C) += tea6415c.o
> obj-$(CONFIG_VIDEO_TEA6420) += tea6420.o
> +obj-$(CONFIG_VIDEO_THP7312) += thp7312.o
> obj-$(CONFIG_VIDEO_THS7303) += ths7303.o
> obj-$(CONFIG_VIDEO_THS8200) += ths8200.o
> obj-$(CONFIG_VIDEO_TLV320AIC23B) += tlv320aic23b.o
> diff --git a/drivers/media/i2c/thp7312.c b/drivers/media/i2c/thp7312.c
> new file mode 100644
> index 000000000000..c289641a9e92
> --- /dev/null
> +++ b/drivers/media/i2c/thp7312.c
> @@ -0,0 +1,1674 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
> + * Copyright (C) 2014-2017 Mentor Graphics Inc.
> + * Copyright (C) 2021 THine Electronics, Inc.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/clk.h>
Alphabetical order please.
> +#include <linux/clk-provider.h>
> +#include <linux/clkdev.h>
> +#include <linux/ctype.h>
> +#include <linux/delay.h>
> +#include <linux/device.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/i2c.h>
> +#include <linux/init.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/slab.h>
> +#include <linux/types.h>
> +#include <linux/firmware.h>
> +#include <media/v4l2-async.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-event.h>
> +#include <media/v4l2-fwnode.h>
> +#include <media/v4l2-subdev.h>
> +
> +#define V4L2_CID_THINE_BASE V4L2_CID_USER_BASE+0x1100
This needs to be reserved in include/uapi/linux/v4l2-controls.h.
> +
> +#define V4L2_CID_THINE_LOW_LIGHT_COMPENSATION V4L2_CID_THINE_BASE+0x01
Parentheses around the expression, and spaces around '+'.
> +#define V4L2_CID_THINE_AUTO_FOCUS_METHOD V4L2_CID_THINE_BASE+0x02
> +#define V4L2_CID_THINE_NOISE_REDUCTION_AUTO V4L2_CID_THINE_BASE+0x03
> +#define V4L2_CID_THINE_NOISE_REDUCTION_ABSOLUTE V4L2_CID_THINE_BASE+0x04
> +
> +#define DEFAULT_FPS 30
Add a THP7312_ prefix to avoid namespace clashes.
> +
> +/* THP7312 register addresses for format */
> +#define THP7312_REG_SET_OUTPUT_ENABLE (0xF008)
Lower-case for hex constants, no need for parentheses.
> +#define THP7312_REG_SET_OUTPUT_COLOR_COMPRESSION (0xF009)
> +#define THP7312_REG_SET_DRIVING_MODE (0xF010)
> +#define THP7312_REG_DRIVING_MODE_STATUS (0xF011)
> +
> +/* THP7312 register values for format */
> +#define THP7312_OUTPUT_ENABLE (0x01)
> +#define THP7312_OUTPUT_DISABLE (0x00)
> +
> +#define THP7312_REG_SET_OUTPUT_COLOR_UYVY (0x00)
> +#define THP7312_REG_SET_OUTPUT_COLOR_YUY2 (0x04)
> +
> +#define THP7312_REG_VIDEO_IMAGE_SIZE (0xF00D)
> +#define THP7312_VIDEO_IMAGE_SIZE_640x360 (0x52)
> +#define THP7312_VIDEO_IMAGE_SIZE_640x460 (0x03)
> +#define THP7312_VIDEO_IMAGE_SIZE_1280x720 (0x0A)
> +#define THP7312_VIDEO_IMAGE_SIZE_1920x1080 (0x0B)
> +#define THP7312_VIDEO_IMAGE_SIZE_3840x2160 (0x0D)
> +#define THP7312_VIDEO_IMAGE_SIZE_4160x3120 (0x14)
> +#define THP7312_VIDEO_IMAGE_SIZE_2016x1512 (0x20)
> +#define THP7312_VIDEO_IMAGE_SIZE_2048x1536 (0x21)
Please indent the value the same way as the register addresses.
> +
> +#define THP7312_REG_VIDEO_FRAME_RATE_MODE (0xF00F)
> +#define THP7312_VIDEO_FRAME_RATE_MODE1 (0x80)
> +#define THP7312_VIDEO_FRAME_RATE_MODE2 (0x81)
> +#define THP7312_VIDEO_FRAME_RATE_MODE3 (0x82)
> +
> +#define THP7312_REG_JPEG_COMPRESSION_FACTOR (0xF01B)
> +
> +//THP7312 register addresses for ctrls
Inconsistent comment style.
> +#define THP7312_REG_FIRMWARE_VERSION_1 (0xF000)
> +#define THP7312_REG_CAMERA_STATUS (0xF001)
> +#define THP7312_REG_FIRMWARE_VERSION_2 (0xF005)
> +#define THP7312_REG_FLIP_MIRROR (0xF00C)
> +#define THP7312_REG_AE_EXPOSURE_COMPENSATION (0xF022)
> +#define THP7312_REG_AE_FLICKER_MODE (0xF023)
> +#define THP7312_REG_AE_FIX_FRAME_RATE (0xF02E)
> +#define THP7312_REG_MANUAL_WB_RED_GAIN (0xF036)
> +#define THP7312_REG_MANUAL_WB_BLUE_GAIN (0xF037)
> +#define THP7312_REG_WB_MODE (0xF039)
> +#define THP7312_REG_MANUAL_FOCUS_POSITION (0xF03C)
> +#define THP7312_REG_AF_CONTROL (0xF040)
> +#define THP7312_REG_AF_SETTING (0xF041)
> +#define THP7312_REG_SATURATION (0xF052)
> +#define THP7312_REG_SHARPNESS (0xF053)
> +#define THP7312_REG_BRIGHTNESS (0xF056)
> +#define THP7312_REG_CONTRAST (0xF057)
> +#define THP7312_REG_NOISE_REDUCTION (0xF059)
> +
> +#define TH7312_REG_CUSTOM_MIPI_SET (0xF0F6)
> +#define TH7312_REG_CUSTOM_MIPI_STATUS (0xF0F7)
> +#define TH7312_REG_CUSTOM_MIPI_RD (0xF0F8)
> +#define TH7312_REG_CUSTOM_MIPI_TD (0xF0F9)
> +
> +/* THP7312 register values for control */
> +#define THP7312_FOCUS_MODE_AUTO_CONTINOUS (0x01)
> +#define THP7312_FOCUS_MODE_AUTO_LOCK (0x80)
> +#define THP7312_FOCUS_MODE_MANUAL (0x10)
> +
> +enum thp7312_focus_method {
> + THP7312_FOCUS_METHOD_CONTRAST = 0x00,
> + THP7312_FOCUS_METHOD_PDAF = 0x01,
> + THP7312_FOCUS_METHOD_HYBRID = 0x02,
> +};
> +
> +#define THP7312_WB_MODE_AUTO (0x00)
> +#define THP7312_WB_MODE_MANUAL (0x11)
> +
> +#define THP7312_AE_FLICKER_MODE_50 (0x00)
> +#define THP7312_AE_FLICKER_MODE_60 (0x01)
> +#define THP7312_AE_FLICKER_MODE_DISABLE (0x80)
> +
> +#define THP7312_NUM_FORMATS ARRAY_SIZE(thp7312_colour_fmts)
Use ARRAY_SIZE(thp7312_colour_fmts) directly in the code, this hinders
readability.
> +
> +#define THP7312_I2C_ADDRESS_AT_FW_UPDATA (0x60)
Inconsistent indentation.
> +
> +
> +enum thp7312_mode {
> + THP7312_MODE_MIN = 0,
> + THP7312_MODE_FHD_30FPS = 0,
> + THP7312_MODE_FHD_60FPS = 1,
> + THP7312_MODE_3M_30FPS = 2,
> + THP7312_MODE_4K_30FPS = 3,
> + THP7312_MODE_13M_20FPS = 4,
> + THP7312_MODE_MAX = 4,
> +};
> +
> +enum thp7312_frame_rate {
> + THP7312_20_FPS = 0,
> + THP7312_30_FPS,
> + THP7312_60_FPS,
> + THP7312_NUM_FRAMERATES,
> +};
Do we need this enum, or could we use the fps directly as a number in
the code ?
> +
> +struct thp7312_datafmt {
> + u32 code;
> + enum v4l2_colorspace colorspace;
> +};
> +
> +struct reg_value {
> + u16 addr;
> + u8 val;
> +};
Can you use the newly merged CCI helpers ?
> +
> +struct thp7312_mode_info {
> + enum thp7312_mode mode;
> + u16 width;
> + u16 height;
> + u32 fps;
> + u16 frame_time;
> + u32 pixel_rate;
> + struct reg_value *reg_data;
> + u32 reg_data_size;
> +};
> +
> +static const struct thp7312_datafmt thp7312_colour_fmts[] = {
> + /*
> + * According to the hardware documentation UYVY should be supported,
> + * but in reality it does not work. This could however be fixed in a
> + * firmware update, so keep this here both for documentation and to
> + * make it easier to re-add later.
> + * { MEDIA_BUS_FMT_UYVY8_1X16, V4L2_COLORSPACE_SRGB, },
> + */
> + { MEDIA_BUS_FMT_YUYV8_1X16, V4L2_COLORSPACE_SRGB, },
Given that the colorspace is always V4L2_COLORSPACE_SRGB, I think you
can hardcode it in thp7312_try_fmt_internal() and drop it from
thp7312_datafmt. The structure would then have a single field, so you
can replace it with a u32 in this array.
> +};
> +
> +static const int thp7312_framerates[] = {
> + [THP7312_20_FPS] = 20,
> + [THP7312_30_FPS] = 30,
> + [THP7312_60_FPS] = 60,
> +};
> +
> +static struct reg_value thp7312_setting_fhd30p[] = {
static const. Same below.
> + { THP7312_REG_VIDEO_IMAGE_SIZE, THP7312_VIDEO_IMAGE_SIZE_1920x1080 },
> + { THP7312_REG_VIDEO_FRAME_RATE_MODE, 0x81 },
> + { THP7312_REG_JPEG_COMPRESSION_FACTOR, 0x5E },
> + { THP7312_REG_SET_DRIVING_MODE, 0x01 },
These two fields areconstant for all modes, you can hardcode them in
thp7312_change_mode().
> +};
> +
> +static struct reg_value thp7312_setting_fhd60p[] = {
> + { THP7312_REG_VIDEO_IMAGE_SIZE, THP7312_VIDEO_IMAGE_SIZE_1920x1080 },
> + { THP7312_REG_VIDEO_FRAME_RATE_MODE, 0x82 },
> + { THP7312_REG_JPEG_COMPRESSION_FACTOR, 0x5E },
> + { THP7312_REG_SET_DRIVING_MODE, 0x01 },
> +};
> +
> +static struct reg_value thp7312_setting_3m30p[] = {
> + { THP7312_REG_VIDEO_IMAGE_SIZE, THP7312_VIDEO_IMAGE_SIZE_2048x1536 },
> + { THP7312_REG_VIDEO_FRAME_RATE_MODE, 0x81 },
> + { THP7312_REG_JPEG_COMPRESSION_FACTOR, 0x5E },
> + { THP7312_REG_SET_DRIVING_MODE, 0x01 },
> +};
> +
> +static struct reg_value thp7312_setting_4k30p[] = {
> + { THP7312_REG_VIDEO_IMAGE_SIZE, THP7312_VIDEO_IMAGE_SIZE_3840x2160 },
> + { THP7312_REG_VIDEO_FRAME_RATE_MODE, 0x81 },
> + { THP7312_REG_JPEG_COMPRESSION_FACTOR, 0x5E },
> + { THP7312_REG_SET_DRIVING_MODE, 0x01 },
> +};
> +
> +static struct reg_value thp7312_setting_13m20p[] = {
> + { THP7312_REG_VIDEO_IMAGE_SIZE, THP7312_VIDEO_IMAGE_SIZE_4160x3120 },
> + { THP7312_REG_VIDEO_FRAME_RATE_MODE, 0x81 },
> + { THP7312_REG_JPEG_COMPRESSION_FACTOR, 0x5E },
> + { THP7312_REG_SET_DRIVING_MODE, 0x01 },
> +};
> +
> +
> +/* regulator supplies */
> +static const char * const thp7312_supply_name[] = {
> + "vddcore",
> + "vhtermrx",
> + "vddtx",
> + "vddhost",
> + "vddcmos",
> + "vddgpio_0",
> + "vddgpio_1",
> + "DOVDD",
> + "AVDD",
> + "DVDD",
See the comment in the DT bindings related to the last three regulators.
> +};
> +
> +#define THP7312_NUM_SUPPLIES ARRAY_SIZE(thp7312_supply_name)
> +
> +static struct thp7312_mode_info thp7312_mode_info_data[] = {
static const
> + { THP7312_MODE_FHD_30FPS, 1920, 1080, THP7312_30_FPS, 33, 150000000,
> + thp7312_setting_fhd30p, ARRAY_SIZE(thp7312_setting_fhd30p)},
> + { THP7312_MODE_FHD_60FPS, 1920, 1080, THP7312_60_FPS, 17, 193750000,
> + thp7312_setting_fhd60p, ARRAY_SIZE(thp7312_setting_fhd60p)},
> + { THP7312_MODE_3M_30FPS, 2048, 1536, THP7312_30_FPS, 33, 150000000,
> + thp7312_setting_3m30p, ARRAY_SIZE(thp7312_setting_3m30p)},
> + { THP7312_MODE_4K_30FPS, 3840, 2160, THP7312_30_FPS, 33, 300000000,
> + thp7312_setting_4k30p, ARRAY_SIZE(thp7312_setting_4k30p)},
> + { THP7312_MODE_13M_20FPS, 4160, 3120, THP7312_20_FPS, 50, 300000000,
> + thp7312_setting_13m20p, ARRAY_SIZE(thp7312_setting_13m20p)},
> +};
> +
> +#define THP7312_NUM_MODES ARRAY_SIZE(thp7312_mode_info_data)
> +
> +struct thp7312_isp_dev {
> + struct i2c_client *i2c_client;
> + struct v4l2_subdev sd;
> + struct media_pad pad;
> + /* the parsed DT endpoint info */
> + struct v4l2_fwnode_endpoint ep;
> + struct gpio_desc *reset_gpio;
> + struct regulator_bulk_data supplies[THP7312_NUM_SUPPLIES];
> + struct clk *iclk;
> + /* lock to protect all members below */
> + struct mutex lock;
> +
> + struct thp7312_mode_info *active_mode;
> +
Did you run checkpatch ? I would have expected it to warn about tabs at
the end of the lines. There are lots of them through the file, as well
as spaces at end of lines.
> + struct v4l2_ctrl_handler ctrl_handler;
> +
> + struct thp7312_mode_info *current_mode;
> + enum thp7312_frame_rate current_fr;
> + struct v4l2_fract frame_interval;
> + struct v4l2_mbus_framefmt fmt;
Use the subdev active state API instead of storing the active format
here. This implies implementing .init_cfg() and calling
v4l2_subdev_init_finalize().
> +
> + bool focus_mode_auto;
> + bool af_continuous;
> + bool af_lock;
> + enum thp7312_focus_method af_method;
Extra space.
> + int boot_mode;
> +
> + const char *fw_name;
> + u8 *fw_data;
> + size_t fw_size;
> +
> + u8 fw_update_mode;
> + u16 thp7312_register_rw_address;
Those two fields are unused. Drop them.
> + u8 fw_major_version;
> + u8 fw_minor_version;
Inconsistent indentation.
> +
> + bool streaming;
> +};
> +
> +static inline struct thp7312_isp_dev *to_thp7312_dev(struct v4l2_subdev *sd)
> +{
> + return container_of(sd, struct thp7312_isp_dev, sd);
> +}
> +
> +static int thp7312_write_reg(struct thp7312_isp_dev *isp_dev, u16 reg, u8 val)
> +{
> + struct i2c_client *client = isp_dev->i2c_client;
> + int ret = 0;
> + u8 buf[3] = {0};
> +
> + buf[0] = reg >> 8;
> + buf[1] = reg & 0xff;
> + buf[2] = val;
> +
> + ret = i2c_master_send(client, buf, 3);
> + if (ret < 0) {
> + dev_err(&client->dev, "%s(): write reg failed, reg=0x%x,val=0x%x ret=%d\n",
> + __func__, reg, val, ret);
> + return ret;
> + }
> +
> + dev_err(&client->dev, "%s(): wrote reg, reg=0x%x,val=0x%x ret=%d\n",
> + __func__, reg, val, ret);
Drop this.
> +
> + return 0;
> +}
> +
> +static int thp7312_read_reg(struct thp7312_isp_dev *isp_dev, u16 reg, u8 *val)
> +{
> + struct i2c_client *client = isp_dev->i2c_client;
> + struct i2c_msg msgs[2];
> + u8 buf[2];
> + int ret;
> +
> + buf[0] = reg >> 8;
> + buf[1] = reg & 0xff;
> + msgs[0].addr = client->addr;
> + msgs[0].flags = 0;
> + msgs[0].len = 2;
> + msgs[0].buf = buf;
> +
> + msgs[1].addr = client->addr;
> + msgs[1].flags = I2C_M_RD;
> + msgs[1].len = 1;
> + msgs[1].buf = buf;
> +
> + ret = i2c_transfer(client->adapter, msgs, 2);
> + if (ret < 0) {
> + dev_err(&client->dev, "%s():reg=0x%x ret=%d\n", __func__, reg, ret);
> + return ret;
> + }
> +
> + *val = buf[0];
> +
> + return 0;
> +}
> +
> +static int thp7312_check_valid_mode(const struct thp7312_mode_info *mode_info,
> + enum thp7312_frame_rate frame_rate)
> +{
> + struct thp7312_mode_info *info;
> + enum thp7312_mode mode = mode_info->mode;
> +
> + if (mode < THP7312_MODE_MIN || THP7312_MODE_MAX < mode)
> + return -EINVAL;
> +
> + info = &thp7312_mode_info_data[mode];
> + if (info->mode != mode || info->fps != frame_rate)
> + return -EINVAL;
> +
> + return 0;
> +}
> +
> +#define thp7312_read_poll_timeout(dev, addr, val, cond, sleep_us, timeout_us) \
> +({ \
> + int __ret; \
> + u64 __timeout_us = (timeout_us); \
> + unsigned long __sleep_us = (sleep_us); \
> + ktime_t __timeout = ktime_add_us(ktime_get(), __timeout_us); \
> + might_sleep_if((__sleep_us) != 0); \
> + for (;;) { \
> + __ret = thp7312_read_reg((dev), (addr), &(val)); \
> + if (cond) \
> + break; \
> + if (__ret < 0 || \
> + (__timeout_us && \
> + ktime_compare(ktime_get(), __timeout) > 0)) { \
> + __ret = thp7312_read_reg((dev), (addr), &(val)); \
> + break; \
> + } \
> + if (__sleep_us) \
> + usleep_range((__sleep_us >> 2) + 1, __sleep_us); \
> + } \
> + (cond) ? 0 : (__ret ? __ret : -ETIMEDOUT); \
> +})
Why can't you use the standard helpers ?
> +
> +static int thp7312_set_mipi_regs(struct thp7312_isp_dev *isp_dev, u16 reg,
> + u8 *lanes, u8 num_lanes)
> +{
> + u8 used_lanes = 0;
> + u8 conv_lanes[4];
> + u8 val;
> + int ret, i;
> +
> + if (num_lanes != 4)
> + return -EINVAL;
Can't happen if you validate it when parsing DT :-)
> +
> + /*
> + * The value that we write to the register is the index in the
> + * data-lanes array, so we need to do a conversion. Do this in the same
> + * pass as validating data-lanes.
> + */
> + for (i = 0; i < num_lanes; i++) {
> + if (lanes[i] > 4)
> + return -EINVAL;
> +
> + if (used_lanes & (1 << lanes[i]))
> + return -EINVAL;
> +
> + used_lanes |= 1 << lanes[i];
> +
> + /*
> + * data-lanes is 1-indexed while we'll use 0-indexing for
> + * writing the register.
> + */
> + conv_lanes[lanes[i] - 1] = i;
> + }
> +
> + val = ((conv_lanes[3] & 0x03) << 6) |
> + ((conv_lanes[2] & 0x03) << 4) |
> + ((conv_lanes[1] & 0x03) << 2) |
> + (conv_lanes[0] & 0x03);
> +
> + ret = thp7312_write_reg(isp_dev, reg, val);
> + if (ret < 0)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int thp7312_set_mipi_lanes(struct thp7312_isp_dev *isp_dev)
> +{
> + struct device *dev = &isp_dev->i2c_client->dev;
> + int ret;
> + u8 val;
> + int i;
> + u32 data_lanes_rx_u32[4];
> + unsigned char data_lanes_rx[4];
> +
> + ret = of_property_read_u32_array(dev->of_node, "thine,rx,data-lanes",
> + data_lanes_rx_u32, ARRAY_SIZE(data_lanes_rx_u32));
> + if (ret < 0) {
> + dev_err(dev, "Failed to read property thine,rx,data-lanes: %d\n", ret);
> + return ret;
> + }
Read this at probe time.
> +
> + for (i = 0; i < 4; i++)
> + data_lanes_rx[i] = (u8)data_lanes_rx_u32[i];
> +
> + ret = thp7312_set_mipi_regs(isp_dev, TH7312_REG_CUSTOM_MIPI_RD,
> + data_lanes_rx,
> + ARRAY_SIZE(data_lanes_rx));
> + if (ret < 0) {
> + dev_err(dev, "Failed to set RD MIPI lanes: %d\n", ret);
> + return ret;
> + }
> +
> + thp7312_set_mipi_regs(isp_dev, TH7312_REG_CUSTOM_MIPI_TD,
> + isp_dev->ep.bus.mipi_csi2.data_lanes,
> + isp_dev->ep.bus.mipi_csi2.num_data_lanes);
> + if (ret < 0) {
> + dev_err(dev, "Failed to set TD MIPI lanes: %d\n", ret);
> + return ret;
> + }
> +
> + ret = thp7312_write_reg(isp_dev, TH7312_REG_CUSTOM_MIPI_SET, 1);
> + if (ret < 0)
> + return ret;
> +
> + ret = thp7312_read_poll_timeout(isp_dev, TH7312_REG_CUSTOM_MIPI_STATUS,
> + val, val == 0x00, 100000, 2000000);
> + if (ret < 0) {
> + dev_err(&isp_dev->i2c_client->dev,
> + "Failed to poll MIPI lane status: %d\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int thp7312_change_mode(struct thp7312_isp_dev *isp_dev,
> + enum thp7312_mode mode)
> +{
> + struct i2c_client *client = isp_dev->i2c_client;
> + u8 reg_val = 0;
> + struct reg_value *reg_data;
> + int i;
> + int ret;
> + struct thp7312_mode_info *info = &thp7312_mode_info_data[mode];
> +
> + ret = thp7312_read_poll_timeout(isp_dev, THP7312_REG_CAMERA_STATUS, reg_val,
> + reg_val == 0x80, 20000, 200000);
> + if (ret < 0) {
> + dev_err(&client->dev, "%s(): failed to poll ISP: %d\n",
> + __func__, ret);
> + return ret;
> + }
> +
> + reg_data = info->reg_data;
> + for (i = 0; i < info->reg_data_size; i++) {
> + ret = thp7312_write_reg(isp_dev, reg_data[i].addr, reg_data[i].val);
> + if (ret < 0) {
> + dev_err(&client->dev, "%s(): write mode failed\n", __func__);
> + return ret;
> + }
> + }
> +
> + ret = thp7312_read_poll_timeout(isp_dev, THP7312_REG_DRIVING_MODE_STATUS,
> + reg_val, reg_val == 0x01, 20000, 100000);
> + if (ret) {
> + dev_err(&client->dev,"%s(): failed\n", __func__);
> + return ret;
> + }
> +
> + isp_dev->active_mode = info;
> +
> + return 0;
> +}
> +
> +static int thp7312_set_framefmt(struct thp7312_isp_dev *isp_dev,
> + struct v4l2_mbus_framefmt *format)
> +{
> + int ret = 0;
> +
> + struct i2c_client *client = isp_dev->i2c_client;
> +
> + switch (format->code) {
> + case MEDIA_BUS_FMT_UYVY8_1X16:
> + /* YUV422, UYVY */
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_SET_OUTPUT_COLOR_COMPRESSION,
> + THP7312_REG_SET_OUTPUT_COLOR_UYVY);
> + break;
> + case MEDIA_BUS_FMT_YUYV8_1X16:
> + /* YUV422, YUYV */
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_SET_OUTPUT_COLOR_COMPRESSION,
> + THP7312_REG_SET_OUTPUT_COLOR_YUY2);
Move the write after the switch, with the value stored in a local
variable
> + break;
> + default:
> + dev_err(&client->dev, "thp7312_set_framefmt: ERROR \n");
> + return -EINVAL;
This should never happen if you perform proper validation at set format
time.
> + }
> +
> + return ret;
> +}
> +
> +static int thp7312_init_mode(struct thp7312_isp_dev *isp_dev)
> +{
> + struct i2c_client *client = isp_dev->i2c_client;
> + int ret = 0;
> + enum thp7312_mode mode = isp_dev->current_mode->mode;
> +
> + dev_dbg(&client->dev, "%s(): mode = %d\n",__func__, mode);
> + if ((mode > THP7312_MODE_MAX || mode < THP7312_MODE_MIN) ){
> + dev_err(&client->dev, "%s(): thp7312 mode is invalid\n", __func__);
> + return -EINVAL;
> + }
This should never happen if you perform proper validation at set format
time.
> +
> + ret = thp7312_set_framefmt(isp_dev, &isp_dev->fmt);
> + if (ret)
> + return ret;
> +
> + return thp7312_change_mode(isp_dev, mode);
> +}
> +
> +static int thp7312_stream_enable(struct thp7312_isp_dev *isp_dev, int enable)
> +{
> + return thp7312_write_reg(isp_dev, THP7312_REG_SET_OUTPUT_ENABLE,
> + enable ? THP7312_OUTPUT_ENABLE
> + : THP7312_OUTPUT_DISABLE);
> +}
> +
> +static int thp7312_reset(struct thp7312_isp_dev *isp_dev)
> +{
> + struct device *dev = &isp_dev->i2c_client->dev;
> + u8 camera_status = -1;
> + int ret;
> +
> + gpiod_set_value_cansleep(isp_dev->reset_gpio, 1);
> +
> + fsleep(10000);
> +
> + gpiod_set_value_cansleep(isp_dev->reset_gpio, 0);
> +
> + fsleep(300000);
That's long :-(
> +
> + while (camera_status != 0x80) {
> + ret = thp7312_read_reg(isp_dev, 0xF001, &camera_status);
> + if (ret < 0) {
> + dev_err(dev, "Failed to read camera status register\n");
> + return ret;
> + }
> +
> + if (camera_status == 0x00) {
> + dev_info(dev, "Camera initializing...");
> + } else if (camera_status == 0x80) {
> + dev_info(dev, "Camera initialization done");
> + break;
> + } else {
> + dev_err(dev,
> + "Camera Status field incorrect; camera_status=%x\n",
> + camera_status);
Have you seen this happening ?
> + }
> +
> + usleep_range(70000, 80000);
> + }
> +
> + return 0;
> +}
> +
> +static int thp7312_set_power_on(struct device *dev)
> +{
> + struct v4l2_subdev *sd = dev_get_drvdata(dev);
> + struct thp7312_isp_dev *isp_dev = to_thp7312_dev(sd);
> +
> + int ret;
> +
> + ret = regulator_bulk_enable(THP7312_NUM_SUPPLIES, isp_dev->supplies);
> + if (ret < 0)
> + return ret;
> +
> + ret = clk_prepare_enable(isp_dev->iclk);
> + if (ret < 0) {
> + dev_err(dev, "clk prepare enable failed\n");
> + goto error_pwdn;
> + }
> +
> + /*
> + * We cannot assume that turning off and on again will reset, so do a
> + * software reset on power up. While at it, reprogram the MIPI lanes,
> + * in case they get cleared when powered off.
How about configuring the data lanes at stream on time ?
> + */
> + ret = thp7312_reset(isp_dev);
> + if (ret < 0)
> + goto error_clk_disable;
> +
> + ret = thp7312_set_mipi_lanes(isp_dev);
> + if (ret < 0)
> + goto error_clk_disable;
> +
> + return 0;
> +
> +error_clk_disable:
> + clk_disable_unprepare(isp_dev->iclk);
> +error_pwdn:
> + regulator_bulk_disable(THP7312_NUM_SUPPLIES, isp_dev->supplies);
> +
> + return ret;
> +}
> +
> +static int thp7312_set_power_off(struct device *dev)
> +{
> + struct v4l2_subdev *sd = dev_get_drvdata(dev);
> + struct thp7312_isp_dev *isp_dev = to_thp7312_dev(sd);
> +
> + isp_dev->streaming = false;
This shouldn't be needed.
> +
> + regulator_bulk_disable(THP7312_NUM_SUPPLIES, isp_dev->supplies);
> + clk_disable_unprepare(isp_dev->iclk);
> +
> + return 0;
> +}
> +
> +static int thp7312_get_regulators(struct thp7312_isp_dev *isp_dev)
> +{
> + int i;
unsigned
> +
> + for (i = 0; i < THP7312_NUM_SUPPLIES; i++)
> + isp_dev->supplies[i].supply = thp7312_supply_name[i];
> +
> + return devm_regulator_bulk_get(&isp_dev->i2c_client->dev,
> + THP7312_NUM_SUPPLIES,
> + isp_dev->supplies);
> +}
> +
> +/* --------------- Subdev Operations --------------- */
> +
> +static const struct thp7312_mode_info *
> +thp7312_find_mode(struct thp7312_isp_dev *isp_dev, enum thp7312_frame_rate fr,
> + int width, int height, bool nearest)
> +{
> + struct thp7312_mode_info *mode_info;
> + unsigned int delta = UINT_MAX;
> + unsigned int smallest_delta_index = 0;
> + unsigned int tmp;
> + int i;
> +
> + for (i = 0; i < THP7312_NUM_MODES; i++) {
> + mode_info = &thp7312_mode_info_data[i];
> + if (mode_info->width == width &&
> + mode_info->height == height &&
> + mode_info->fps == fr)
> + return mode_info;
> +
> + tmp = abs((mode_info->width * mode_info->height) - (width * height));
> + if (tmp < delta) {
> + delta = tmp;
> + smallest_delta_index = i;
> + }
> + }
> +
> + if (!nearest)
> + return NULL;
> +
> + return &thp7312_mode_info_data[smallest_delta_index];
> +}
> +
> +static int thp7312_try_frame_interval(struct thp7312_isp_dev *isp_dev,
> + struct v4l2_fract *fi,
> + u32 width, u32 height)
> +{
> + const struct thp7312_mode_info *mode_info;
> + int minfps, maxfps, best_fps, fps;
> + int i;
> + enum thp7312_frame_rate rate = THP7312_20_FPS;
> + minfps = thp7312_framerates[THP7312_20_FPS];
> + maxfps = thp7312_framerates[THP7312_60_FPS];
> +
> + if (fi->numerator == 0) {
> + fi->denominator = maxfps;
> + fi->numerator = 1;
> + rate = THP7312_60_FPS;
> + goto find_mode;
> + }
> +
> + fps = clamp_val(DIV_ROUND_CLOSEST(fi->denominator, fi->numerator),
> + minfps, maxfps);
> +
> + best_fps = minfps;
> + for (i = 0; i < ARRAY_SIZE(thp7312_framerates); i++) {
> + int curr_fps = thp7312_framerates[i];
> +
> + if (abs(curr_fps - fps) < abs(best_fps - fps)) {
> + best_fps = curr_fps;
> + rate = i;
> + }
> + }
> +
> + fi->numerator = 1;
> + fi->denominator = best_fps;
> +
> +find_mode:
> + mode_info = thp7312_find_mode(isp_dev, rate, width, height, false);
> + return mode_info ? rate : -EINVAL;
> +}
> +
> +static int thp7312_get_fmt(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_format *format)
> +{
> + struct thp7312_isp_dev *isp_dev = to_thp7312_dev(sd);
> + struct v4l2_mbus_framefmt *fmt;
> +
> + if (format->pad != 0)
> + return -EINVAL;
> +
> + mutex_lock(&isp_dev->lock);
> +
> + if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
> + fmt = v4l2_subdev_get_try_format(&isp_dev->sd, sd_state,
> + format->pad);
> + } else {
> + fmt = &isp_dev->fmt;
> + }
> +
> + format->format = *fmt;
> +
> + mutex_unlock(&isp_dev->lock);
> +
> + return 0;
> +}
> +
> +static int thp7312_try_fmt_internal(struct v4l2_subdev *sd,
> + struct v4l2_mbus_framefmt *fmt,
> + enum thp7312_frame_rate frame_rate,
> + const struct thp7312_mode_info **new_mode)
> +{
> + struct thp7312_isp_dev *isp_dev = to_thp7312_dev(sd);
> + const struct thp7312_mode_info *mode_info;
> + int i;
unsigned int
> +
> + mode_info = thp7312_find_mode(isp_dev, frame_rate, fmt->width, fmt->height, true);
> + if (!mode_info)
> + return -EINVAL;
> + fmt->width = mode_info->width;
> + fmt->height = mode_info->height;
> + memset(fmt->reserved, 0, sizeof(fmt->reserved));
> +
> + if (new_mode)
> + *new_mode = mode_info;
> +
> + for (i = 0; i < ARRAY_SIZE(thp7312_colour_fmts); i++)
> + if (thp7312_colour_fmts[i].code == fmt->code)
> + break;
> + if (i >= ARRAY_SIZE(thp7312_colour_fmts))
> + i = 0;
> +
> + fmt->code = thp7312_colour_fmts[i].code;
> + fmt->colorspace = thp7312_colour_fmts[i].colorspace;
> + fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
> + fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
> + fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
> +
> + return 0;
> +}
> +
> +static int thp7312_set_fmt(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_format *format)
> +{
> + struct thp7312_isp_dev *isp_dev = to_thp7312_dev(sd);
> + const struct thp7312_mode_info *new_mode;
> + struct v4l2_mbus_framefmt *mbus_fmt = &format->format;
> + struct v4l2_mbus_framefmt *fmt;
> + int ret;
> +
> + if (format->pad != 0)
> + return -EINVAL;
> +
> + mutex_lock(&isp_dev->lock);
> +
> + if (isp_dev->streaming) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> + ret = thp7312_try_fmt_internal(sd, mbus_fmt,
> + isp_dev->current_fr, &new_mode);
> + if (ret)
> + goto out;
> +
> + if (format->which == V4L2_SUBDEV_FORMAT_TRY)
> + fmt = v4l2_subdev_get_try_format(sd, sd_state, format->pad);
> + else
> + fmt = &isp_dev->fmt;
Using the subdev active state API will simplify this.
> +
> + *fmt = *mbus_fmt;
> +
> + if (format->which == V4L2_SUBDEV_FORMAT_TRY)
> + goto out;
> +
> + isp_dev->current_mode = (struct thp7312_mode_info *)new_mode;
> + isp_dev->fmt = *mbus_fmt;
> +
> +out:
> + mutex_unlock(&isp_dev->lock);
> + return ret;
> +}
> +
> +static int thp7312_enum_frame_size(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_frame_size_enum *fse)
> +{
> + if (fse->pad != 0)
> + return -EINVAL;
> + if (fse->index >= THP7312_NUM_MODES)
> + return -EINVAL;
> +
> + fse->min_width =
> + thp7312_mode_info_data[fse->index].width;
This holds on a single line.
> + fse->max_width = fse->min_width;
> + fse->min_height =
> + thp7312_mode_info_data[fse->index].height;
This too.
> + fse->max_height = fse->min_height;
> +
> + return 0;
> +}
> +
> +static int thp7312_enum_frame_interval(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_frame_interval_enum *fie)
> +{
> + int i, j, count;
unsigned
> +
> + if (fie->pad != 0)
> + return -EINVAL;
> + if (fie->index >= THP7312_NUM_FRAMERATES)
> + return -EINVAL;
> +
> + if (fie->width == 0 || fie->height == 0 || fie->code == 0)
> + return -EINVAL;
> +
> + fie->interval.numerator = 1;
> +
> + /*
> + * This is correct but, given the limited number of modes that we
> + * support, could be heavily simplified. Or do we want to keep this
> + * complexity for future-proofing?
> + */
> + count = 0;
> + for (i = 0; i < THP7312_NUM_FRAMERATES; i++) {
> + for (j = 0; j < THP7312_NUM_MODES; j++) {
> + if (fie->width == thp7312_mode_info_data[j].width &&
> + fie->height == thp7312_mode_info_data[j].height &&
> + !thp7312_check_valid_mode(&thp7312_mode_info_data[j], i))
> + count++;
> +
> + if (fie->index == (count - 1)) {
> + fie->interval.denominator = thp7312_framerates[i];
> + return 0;
> + }
> + }
> + }
> +
> + return -EINVAL;
> +}
> +
> +static int thp7312_g_frame_interval(struct v4l2_subdev *sd,
> + struct v4l2_subdev_frame_interval *fi)
> +{
> + struct thp7312_isp_dev *isp_dev = to_thp7312_dev(sd);
> +
> + mutex_lock(&isp_dev->lock);
> + fi->interval = isp_dev->frame_interval;
> + mutex_unlock(&isp_dev->lock);
> +
> + return 0;
> +}
> +
> +static int thp7312_s_frame_interval(struct v4l2_subdev *sd,
> + struct v4l2_subdev_frame_interval *fi)
> +{
> + struct thp7312_isp_dev *isp_dev = to_thp7312_dev(sd);
> + const struct thp7312_mode_info *mode_info;
> + int frame_rate, ret = 0;
> +
> + if (fi->pad != 0)
> + return -EINVAL;
> +
> + mutex_lock(&isp_dev->lock);
> +
> + if (isp_dev->streaming) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> + mode_info = isp_dev->current_mode;
> +
> + frame_rate = thp7312_try_frame_interval(isp_dev, &fi->interval,
> + mode_info->width, mode_info->height);
> + if (frame_rate < 0) {
> + /* This shouldn't be possible */
> + ret = -EINVAL;
> + goto out;
> + }
> +
> + mode_info = thp7312_find_mode(isp_dev, frame_rate, mode_info->width,
> + mode_info->height, true);
> + if (!mode_info) {
> + ret = -EINVAL;
> + goto out;
> + }
> +
> + isp_dev->current_fr = frame_rate;
> + isp_dev->frame_interval = fi->interval;
> + isp_dev->current_mode = (struct thp7312_mode_info *)mode_info;
> +
> +out:
> + mutex_unlock(&isp_dev->lock);
> + return ret;
> +}
> +
> +static int thp7312_enum_mbus_code(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_mbus_code_enum *code)
> +{
> + if (code->pad != 0)
> + return -EINVAL;
> + if (code->index >= THP7312_NUM_FORMATS)
> + return -EINVAL;
> +
> + code->code = thp7312_colour_fmts[code->index].code;
> +
> + return 0;
> +}
> +
> +static int thp7312_s_stream(struct v4l2_subdev *sd, int enable)
> +{
> + struct thp7312_isp_dev *isp_dev = to_thp7312_dev(sd);
> + struct i2c_client *client = isp_dev->i2c_client;
> + int ret = 0;
> +
> + mutex_lock(&isp_dev->lock);
> +
> + if (!enable) {
> + ret = thp7312_stream_enable(isp_dev, enable);
> + if (ret < 0) {
> + dev_err(&client->dev, "stream stop failed: %d\n", ret);
> + goto finish_unlock;
> + }
I think it would make sense to power off on failure. The caller won't
retry.
> +
> + isp_dev->streaming = enable;
> +
> + goto finish_pm;
pm_runtime_put(&client->dev);
mutex_unlock(&isp_dev->lock);
return 0;
would be clearer I think.
> + }
> +
> + ret = pm_runtime_resume_and_get(&client->dev);
> + if (ret < 0)
> + goto finish_unlock;
> +
> + ret = thp7312_check_valid_mode(isp_dev->current_mode,
> + isp_dev->current_fr);
> + if (ret) {
This can't happen, it should have been caught when setting the format.
> + dev_err(&client->dev, "Not support WxH@...=%dx%d@%d\n",
> + isp_dev->current_mode->width,
> + isp_dev->current_mode->height,
> + thp7312_framerates[isp_dev->current_fr]);
> + goto finish_pm;
> + }
> +
> + ret = thp7312_init_mode(isp_dev);
> + if (ret)
> + goto finish_pm;
> +
> + ret = thp7312_stream_enable(isp_dev, enable);
> + if (ret < 0)
> + goto finish_pm;
> +
> + isp_dev->streaming = enable;
> +
> +finish_pm:
> + pm_runtime_put(&client->dev);
> +finish_unlock:
> + mutex_unlock(&isp_dev->lock);
> +
> + return ret;
> +}
> +
> +static const struct v4l2_subdev_core_ops thp7312_core_ops = {
> + .log_status = v4l2_ctrl_subdev_log_status,
> + .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> + .unsubscribe_event = v4l2_event_subdev_unsubscribe,
> +};
> +
> +static const struct v4l2_subdev_video_ops thp7312_video_ops = {
> + .g_frame_interval = thp7312_g_frame_interval,
> + .s_frame_interval = thp7312_s_frame_interval,
> + .s_stream = thp7312_s_stream,
> +};
> +
> +static const struct v4l2_subdev_pad_ops thp7312_pad_ops = {
> + .enum_mbus_code = thp7312_enum_mbus_code,
> + .get_fmt = thp7312_get_fmt,
> + .set_fmt = thp7312_set_fmt,
> + .enum_frame_size = thp7312_enum_frame_size,
> + .enum_frame_interval = thp7312_enum_frame_interval,
> +};
> +
> +static const struct v4l2_subdev_ops thp7312_subdev_ops = {
> + .core = &thp7312_core_ops,
> + .video = &thp7312_video_ops,
> + .pad = &thp7312_pad_ops,
> +};
> +
> +static inline struct thp7312_isp_dev *to_thp7312_from_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + return container_of(ctrl->handler, struct thp7312_isp_dev, ctrl_handler);
> +}
> +
> +static int thp7312_set_manual_focus_position(struct thp7312_isp_dev *isp_dev, s32 val)
> +{
> + struct i2c_client *client = isp_dev->i2c_client;
> + struct device *dev = &client->dev;
> +
> + int ret = 0;
> + u16 value = 3000;
> +
> + static u16 focus_values[] = {
> + 3000, 1000, 600, 450, 350,
> + 290, 240, 200, 170, 150,
> + 140, 130, 120, 110, 100,
> + 93, 87, 83, 80,
> + };
> +
> + if (0 <= val && val < ARRAY_SIZE(focus_values))
> + value = focus_values[val];
> + else
> + dev_err(dev, "unsupported focus position = %d\n",val);
Can this happen ?
> +
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_MANUAL_FOCUS_POSITION,
> + (s8)(value >> 8));
> + if (ret < 0)
> + goto out;
> +
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_MANUAL_FOCUS_POSITION + 1,
> + (s8)(value & 0x00ff));
> + if (ret < 0)
> + goto out;
> +
> +out:
> + if (ret < 0)
> + dev_err(dev, "Failed to set manual focus position %d: %d\n", val, ret);
> +
> + return ret;
> +}
> +
> +static int
> +thp7312_set_focus_mode(struct thp7312_isp_dev *isp_dev, bool auto_focus,
> + bool continous, bool lock, enum thp7312_focus_method method)
> +{
> + u8 value;
> + int ret = 0;
> +
> + /* Set Continous and AF Method */
> +
> + if (continous == true) {
> + /* Continous AF */
> + if (method == THP7312_FOCUS_METHOD_CONTRAST)
> + value = 0x30;
> + else if (method == THP7312_FOCUS_METHOD_PDAF)
> + value = 0x70;
> + else /* method == THP7312_FOCUS_METHOD_HYBRID */
> + value = 0xF0;
> + } else {
> + /* One Shot AF */
> + if (method == THP7312_FOCUS_METHOD_CONTRAST)
> + value = 0x00;
> + else if (method == THP7312_FOCUS_METHOD_PDAF)
> + value = 0x40;
> + else /* method == THP7312_FOCUS_METHOD_HYBRID */
> + value = 0x80;
> + }
> +
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_AF_SETTING, value);
> +
> + isp_dev->af_continuous = continous;
> + isp_dev->af_method = method;
> +
> + /* Set Lock and Focus Mode */
> +
> + if (auto_focus == true) {
> + if (lock == true && continous == true)
> + value = THP7312_FOCUS_MODE_AUTO_LOCK;
> + else
> + value = THP7312_FOCUS_MODE_AUTO_CONTINOUS;
> +
> + isp_dev->focus_mode_auto = true;
> + } else {
> + /* Lock AF to prepare to set manual focus mode */
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_AF_CONTROL,
> + THP7312_FOCUS_MODE_AUTO_LOCK);
> + value = THP7312_FOCUS_MODE_MANUAL;
> +
> + isp_dev->focus_mode_auto = false;
> + }
> +
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_AF_CONTROL, value);
> +
> + isp_dev->af_lock = lock;
> +
> + return ret;
It looks like grouping V4L2_CID_FOCUS_AUTO and V4L2_CID_FOCUS_ABSOLUTE
in a cluster could simplify this a lot.
> +}
> +
> +static int thp7312_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + struct thp7312_isp_dev *isp_dev = to_thp7312_from_ctrl(ctrl);
> + struct i2c_client *client = isp_dev->i2c_client;
> + struct device *dev = &client->dev;
> + int ret = 0;
> + u8 value;
> + bool lock;
> +
> + if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
> + return -EINVAL;
> +
> + dev_dbg(dev, "s_ctrl id %d, value %d\n", ctrl->id, ctrl->val);
> +
> + if (pm_runtime_get_if_in_use(&client->dev))
> + return 0;
> +
> + switch (ctrl->id) {
> +
> + case V4L2_CID_BRIGHTNESS:
> + value = clamp_t(int, ctrl->val, -10, 10) + 10;
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_BRIGHTNESS, value);
> + break;
> +
> + case V4L2_CID_THINE_LOW_LIGHT_COMPENSATION:
> + /* 0 = Auto adjust frame rate, 1 = Fix frame rate */
> + value = (ctrl->val == true) ? 0 : 1;
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_AE_FIX_FRAME_RATE, value);
> + break;
> +
> + case V4L2_CID_FOCUS_AUTO:
> + lock = (ctrl->val == true) ? false : true;
> + ret = thp7312_set_focus_mode(isp_dev, true, true, lock,
> + isp_dev->af_method);
> + break;
> +
> + case V4L2_CID_FOCUS_ABSOLUTE:
> + ret = thp7312_set_manual_focus_position(isp_dev, ctrl->val);
> + if (ret < 0) {
> + dev_err(dev, "thp7312_set_manual_focus failed %d\n", value);
> + break;
> + }
> +
> + /*
> + * If we're in auto, don't change to manual mode. The hardware
> + * will not apply the focus potision if it's set to auto, so no
> + * need to skip that.
> + */
> + if (isp_dev->af_continuous == true && isp_dev->af_lock == false)
> + break;
> +
> + /* Change to manual mode */
> + ret = thp7312_set_focus_mode(isp_dev, false, false, false,
> + isp_dev->af_method);
> + break;
> +
> +
> + case V4L2_CID_AUTO_FOCUS_START:
> + /* If we're in auto, don't do one-shot AF. */
> + if (isp_dev->af_continuous == true && isp_dev->af_lock == false)
> + break;
> +
> + /* Change to one-shot auto mode (with lock) */
> + ret = thp7312_set_focus_mode(isp_dev, true, false, true,
> + isp_dev->af_method);
> + break;
> +
> +
> + case V4L2_CID_THINE_AUTO_FOCUS_METHOD:
> + ret = thp7312_set_focus_mode(isp_dev, isp_dev->focus_mode_auto,
> + isp_dev->af_continuous,
> + isp_dev->af_lock, ctrl->val);
> + break;
> +
> +
> + case V4L2_CID_ROTATE:
> + if (ctrl->val == 0)
> + value = 0; /* 0 degree. camera is set to normal.*/
> + else
> + value = 3; /* 180 degree. camera is set to flip & mirror */
> +
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_FLIP_MIRROR, value);
> + if (ret < 0)
> + dev_err(dev, "Failed to set flip and mirror: %d\n", ret);
I think you can drop this error message, as well as the messages below,
as thp7312_write_reg() prints an error.
> + break;
> +
> + case V4L2_CID_THINE_NOISE_REDUCTION_AUTO:
> + ret = thp7312_read_reg(isp_dev, THP7312_REG_NOISE_REDUCTION, &value);
Would it be useful to cache the register value in the isp_dev structure,
to avoid reading it back ? Or perhaps better, group the
V4L2_CID_THINE_NOISE_REDUCTION_AUTO and
V4L2_CID_THINE_NOISE_REDUCTION_ABSOLUTE controls in a cluster, and write
THP7312_REG_NOISE_REDUCTION once based on the value of both controls.
> + if (ret < 0) {
> + dev_err(dev, "Failed to read noise reduction: %d\n", ret);
> + break;
> + }
> +
> + value = (ctrl->val == true) ? (value & 0x7F) : (value | 0x80);
> +
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_NOISE_REDUCTION, value);
> + if (ret < 0)
> + dev_err(dev, "Failed to set noise reduction auto: %d\n", ret);
> + break;
> +
> + case V4L2_CID_THINE_NOISE_REDUCTION_ABSOLUTE:
> + ret = thp7312_read_reg(isp_dev, THP7312_REG_NOISE_REDUCTION, &value);
> + if (ret < 0) {
> + dev_err(dev, "Failed to read noise reduction: %d\n", ret);
> + break;
> + }
> +
> + value = value & 0x80;
> + value = value | (ctrl->val & 0x7F);
> +
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_NOISE_REDUCTION, value);
> + if (ret < 0)
> + dev_err(dev, "Failed to set noise reduction absolute: %d\n", ret);
> + break;
> +
> + case V4L2_CID_AUTO_WHITE_BALANCE:
> + value = (ctrl->val == true) ? THP7312_WB_MODE_AUTO : THP7312_WB_MODE_MANUAL;
> +
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_WB_MODE, value);
> + if (ret < 0)
> + dev_err(dev, "Failed to write auto white balance: %d\n", ret);
> + break;
> +
> + case V4L2_CID_RED_BALANCE:
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_MANUAL_WB_RED_GAIN, ctrl->val);
> + if (ret < 0)
> + dev_err(dev, "Failed to write manual red balance: %d\n", ret);
> + break;
> +
> + case V4L2_CID_BLUE_BALANCE:
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_MANUAL_WB_BLUE_GAIN, ctrl->val);
> + if (ret < 0)
> + dev_err(dev, "Failed to write manual blue balance: %d\n", ret);
> + break;
> +
> + case V4L2_CID_AUTO_EXPOSURE_BIAS:
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_AE_EXPOSURE_COMPENSATION, ctrl->val);
> + break;
> +
> + case V4L2_CID_POWER_LINE_FREQUENCY:
> + if (ctrl->val == V4L2_CID_POWER_LINE_FREQUENCY_60HZ) {
> + value = THP7312_AE_FLICKER_MODE_60;
> + } else if (ctrl->val==V4L2_CID_POWER_LINE_FREQUENCY_50HZ) {
Space around ==
> + value = THP7312_AE_FLICKER_MODE_50;
> + } else {
> + if (isp_dev->fw_major_version == 40 && isp_dev->fw_minor_version == 03) {
> + /* THP7312_AE_FLICKER_MODE_DISABLE is not supported */
> + value = THP7312_AE_FLICKER_MODE_50;
> + } else {
> + value = THP7312_AE_FLICKER_MODE_DISABLE;
> + }
> + }
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_AE_FLICKER_MODE, value);
> + break;
> +
> + case V4L2_CID_SATURATION:
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_SATURATION, ctrl->val);
> + break;
> +
> + case V4L2_CID_CONTRAST:
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_CONTRAST, ctrl->val);
> + break;
> +
> + case V4L2_CID_SHARPNESS:
> + ret = thp7312_write_reg(isp_dev, THP7312_REG_SHARPNESS, ctrl->val);
> + break;
> +
> + default:
> + dev_err(dev, "unsupported control id: %d\n", ctrl->id);
Can this happen ?
> + break;
> + }
> +
> + pm_runtime_put(&client->dev);
> +
> + return ret;
> +}
> +
> +static const struct v4l2_ctrl_ops thp7312_ctrl_ops = {
> + .s_ctrl = thp7312_s_ctrl,
> +};
> +
> +static const struct v4l2_ctrl_config thp7312_v4l2_ctrls_custom[] = {
> + {
> + .ops = &thp7312_ctrl_ops,
> + .id = V4L2_CID_THINE_LOW_LIGHT_COMPENSATION,
> + .name = "Low Light Compensation",
Custom controls should be documented. I this will help discussing
whether or not some of the custom controls can be standardized.
> + .type = V4L2_CTRL_TYPE_BOOLEAN,
> + .min = 0,
> + .def = 1,
> + .max = 1,
> + .step = 1,
> + },
> +
Extra blank line. Write
}, {
> + {
> + .ops = &thp7312_ctrl_ops,
> + .id = V4L2_CID_THINE_AUTO_FOCUS_METHOD,
> + .name = "Auto-Focus Method",
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .min = 0,
> + .def = 2,
> + .max = 2,
> + .step = 1,
> + },
> +
> + {
> + .ops = &thp7312_ctrl_ops,
> + .id = V4L2_CID_THINE_NOISE_REDUCTION_AUTO,
> + .name = "Noise Reduction Auto",
> + .type = V4L2_CTRL_TYPE_BOOLEAN,
> + .min = 0,
> + .def = 1,
> + .max = 1,
> + .step = 1,
> + },
> +
> + {
> + .ops = &thp7312_ctrl_ops,
> + .id = V4L2_CID_THINE_NOISE_REDUCTION_ABSOLUTE,
> + .name = "Noise Reduction Level",
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .min = 0,
> + .def = 0,
> + .max = 10,
> + .step = 1,
> + },
> +};
> +
> +static const s64 exp_bias_qmenu[] = {
> + -2000, -1667, -1333, -1000, -667, -333, 0, 333, 667, 1000, 1333, 1667, 2000
> +};
> +
> +static int thp7312_init_controls(struct thp7312_isp_dev *isp_dev)
> +{
> + struct v4l2_ctrl *ctrl;
> + struct device *dev = &isp_dev->i2c_client->dev;
> + int i, ret = 0;
Make i an unsigned int.
No need to initialize ret.
> + struct v4l2_ctrl_handler *hdl = &isp_dev->ctrl_handler;
> + struct v4l2_fwnode_device_properties props;
> +
> + v4l2_ctrl_handler_init(hdl, 64);
64 ?
> +
> + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_FOCUS_AUTO,
> + 0, 1, 1, 1);
> + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_AUTO_FOCUS_START,
> + 1, 1, 1, 1);
> + /* 0: 3000cm, 18: 8cm */
> + ctrl = v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_FOCUS_ABSOLUTE,
> + 0, 18, 1, 0);
Move the focus_values array out of thp7312_set_manual_focus_position()
and use ARRAY_SIZE here.
> + if (ctrl != NULL) {
if (ctrl) {
> + /*
> + * This needs to be set so that the value will be saved even if
> + * it is set while FOCUS_AUTO is true
> + */
> + ctrl->flags |= V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
> + }
> +
> + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_AUTO_WHITE_BALANCE,
> + 0, 1, 1, 1);
> + /* 32: 1x, 255: 7.95x */
> + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_RED_BALANCE,
> + 32, 255, 1, 64);
> + /* 32: 1x, 255: 7.95x */
> + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_BLUE_BALANCE,
> + 32, 255, 1, 50);
> +
> + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_BRIGHTNESS,
> + -10, 10, 1, 0);
> + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_SATURATION,
> + 0, 31, 1, 10);
> + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_CONTRAST,
> + 0, 20, 1, 10);
> + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_SHARPNESS,
> + 0, 31, 1, 8);
> +
> + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_ROTATE,
> + 0, 180, 180, 0);
> +
> + v4l2_ctrl_new_int_menu(hdl, &thp7312_ctrl_ops,
> + V4L2_CID_AUTO_EXPOSURE_BIAS,
> + ARRAY_SIZE(exp_bias_qmenu) - 1,
> + ARRAY_SIZE(exp_bias_qmenu) / 2, exp_bias_qmenu);
> +
> + v4l2_ctrl_new_std_menu(hdl, &thp7312_ctrl_ops,
> + V4L2_CID_POWER_LINE_FREQUENCY,
> + V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 0,
> + V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
> +
> + /* set properties from fwnode (e.g. rotation, orientation) */
> + ret = v4l2_fwnode_device_parse(dev, &props);
> + if (ret) {
> + dev_err(dev, "Failed to parse fwnode: %d\n", ret);
> + goto error;
> + }
> +
> + ret = v4l2_ctrl_new_fwnode_properties(hdl, &thp7312_ctrl_ops, &props);
> + if (ret) {
> + dev_err(dev, "Failed to create new v4l2 ctrl for fwnode properties: %d\n", ret);
> + goto error;
> + }
> +
> + for (i = 0; i < ARRAY_SIZE(thp7312_v4l2_ctrls_custom); i++)
> + v4l2_ctrl_new_custom(hdl, &thp7312_v4l2_ctrls_custom[i], NULL);
> +
> + if (hdl->error) {
> + dev_err(dev, "v4l2_ctrl_handler error\n");
> + ret = hdl->error;
> + goto error;
> + }
> +
> + v4l2_ctrl_handler_setup(hdl);
I'd skip this here, as you should power off the device at the end of the
probe() function. You need to call v4l2_ctrl_handler_setup() when you
start streaming.
> +
> + return ret;
return 0;
> +
> +error:
> + v4l2_ctrl_handler_free(hdl);
> + return ret;
> +}
> +
> +static int thp7312_read_firmware_version(struct thp7312_isp_dev *isp_dev)
> +{
> + int ret;
> +
> + ret = thp7312_read_reg(isp_dev, THP7312_REG_FIRMWARE_VERSION_1,
> + &isp_dev->fw_major_version);
> + if (ret < 0)
> + return ret;
> +
> + return thp7312_read_reg(isp_dev, THP7312_REG_FIRMWARE_VERSION_2,
> + &isp_dev->fw_minor_version);
> +}
> +
> +static void thp7312_init_fmt(struct thp7312_isp_dev *isp_dev)
> +{
> + struct v4l2_mbus_framefmt *fmt;
> +
> + /*
> + * default init sequence initialize isp_dev to
> + * YUV422 YUYV VGA@...ps
> + */
> + fmt = &isp_dev->fmt;
> + fmt->code = MEDIA_BUS_FMT_YUYV8_1X16;
> + fmt->colorspace = V4L2_COLORSPACE_SRGB;
> + fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
> + fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
> + fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
> + fmt->width = 1920;
> + fmt->height = 1080;
> + fmt->field = V4L2_FIELD_NONE;
This should go through .init_cfg().
> + isp_dev->frame_interval.numerator = 1;
> + isp_dev->frame_interval.denominator = thp7312_framerates[THP7312_30_FPS];
> + isp_dev->current_fr = THP7312_30_FPS;
> +
> + isp_dev->active_mode = &thp7312_mode_info_data[0];
> +}
> +
> +static int thp7312_parse_dt(struct thp7312_isp_dev *isp_dev)
> +{
> + struct fwnode_handle *endpoint;
> + struct device *dev = &isp_dev->i2c_client->dev;
> + int ret;
> +
> + endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
> + if (!endpoint) {
> + dev_err(dev, "endpoint node not found\n");
> + return -EINVAL;
> + }
> +
> + ret = v4l2_fwnode_endpoint_parse(endpoint, &isp_dev->ep);
> + fwnode_handle_put(endpoint);
> + if (ret) {
> + dev_err(dev, "Could not parse endpoint\n");
> + return ret;
> + }
> +
> + if (isp_dev->ep.bus_type != V4L2_MBUS_CSI2_DPHY) {
> + dev_err(dev, "Unsupported bus type %d\n", isp_dev->ep.bus_type);
> + return -EINVAL;
> + }
Should you validate num_data_lanes ?
> +
> + return 0;
> +}
> +
> +static int thp7312_probe(struct i2c_client *client)
> +{
> + struct device *dev = &client->dev;
> + struct thp7312_isp_dev *isp_dev;
> + int ret;
> +
> + dev_info(dev, "Start of probe %s:%d", __func__, __LINE__);
That looks like a debugging leftover.
> + isp_dev = devm_kzalloc(dev, sizeof(*isp_dev), GFP_KERNEL);
> + if (!isp_dev)
> + return -ENOMEM;
> + isp_dev->i2c_client = client;
> +
> + thp7312_init_fmt(isp_dev);
> +
> + isp_dev->current_mode =
> + (struct thp7312_mode_info *)thp7312_find_mode(isp_dev,
> + isp_dev->current_fr,
> + isp_dev->fmt.width,
> + isp_dev->fmt.height,
> + true);
> +
> + /* TODO fix firmware */
What needs to be fixed ?
> + /* update mode hardcoded at 0 for now */
What does this mean ?
> + isp_dev->fw_update_mode = 0;
> + isp_dev->fw_major_version = 0;
> + isp_dev->fw_minor_version = 0;
The structure is kzalloc'ed, so you could skip this.
> + isp_dev->thp7312_register_rw_address = 61440;
> +
> + ret = thp7312_parse_dt(isp_dev);
> + if (ret < 0) {
> + dev_err(dev, "Failed to parse DT: %d\n", ret);
> + return ret;
> + }
> +
> + ret = thp7312_get_regulators(isp_dev);
> + if (ret) {
> + dev_err(dev, "Failed to get regulators: %d\n", ret);
> + return ret;
> + }
> +
> + isp_dev->iclk = devm_clk_get(dev, NULL);
> + if (IS_ERR(isp_dev->iclk)) {
> + dev_err(dev, "Failed to get iclk\n");
> + return PTR_ERR(isp_dev->iclk);
> + }
> +
> + /* request reset pin */
> + isp_dev->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
> + if (IS_ERR(isp_dev->reset_gpio)) {
> + dev_err(dev, "Failed to get reset gpio\n");
> + return PTR_ERR(isp_dev->reset_gpio);
> + }
> +
> + v4l2_i2c_subdev_init(&isp_dev->sd, client, &thp7312_subdev_ops);
> + isp_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
> + isp_dev->pad.flags = MEDIA_PAD_FL_SOURCE;
> + isp_dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> +
> + mutex_init(&isp_dev->lock);
> +
> + ret = media_entity_pads_init(&isp_dev->sd.entity, 1, &isp_dev->pad);
> + if (ret)
> + goto mutex_destroy;
> +
> + ret = thp7312_set_power_on(dev);
> + if (ret)
> + goto entity_cleanup;
> +
> + ret = thp7312_read_firmware_version(isp_dev);
> + if (ret < 0) {
> + dev_warn(dev, "Camera is not found\n");
> + goto power_off;
> + }
> +
> + dev_info(dev, "THP7312 firmware version = %02d.%02d",
> + isp_dev->fw_major_version, isp_dev->fw_minor_version);
dev_dbg()
> +
> + ret = thp7312_init_controls(isp_dev);
> + if (ret)
> + goto power_off;
> +
> + isp_dev->sd.ctrl_handler = &isp_dev->ctrl_handler;
Move this to thp7312_init_controls().
> +
> + ret = v4l2_async_register_subdev(&isp_dev->sd);
> + if (ret < 0) {
> + dev_err(dev, "Subdev registeration failed");
> + goto free_ctrls;
> + }
> +
> + pm_runtime_set_active(dev);
> + pm_runtime_enable(dev);
PM runtime needs to be initialized before registering the async subdev,
as it could be acquired by the consumer before
v4l2_async_register_subdev() returns.
You're ending probe with the device powered on. Is this on purpose ?
> +
> + dev_info(dev, "v4l2 async register subdev done");
Another debugging leftover ?
> +
> + return 0;
> +
> +free_ctrls:
> + v4l2_ctrl_handler_free(&isp_dev->ctrl_handler);
> +power_off:
> + thp7312_set_power_off(dev);
> +entity_cleanup:
> + media_entity_cleanup(&isp_dev->sd.entity);
> +mutex_destroy:
> + mutex_destroy(&isp_dev->lock);
> + return ret;
> +}
> +
> +static void thp7312_remove(struct i2c_client *client)
> +{
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct thp7312_isp_dev *isp_dev = to_thp7312_dev(sd);
> +
> + v4l2_async_unregister_subdev(&isp_dev->sd);
> + v4l2_ctrl_handler_free(&isp_dev->ctrl_handler);
> + media_entity_cleanup(&isp_dev->sd.entity);
> + v4l2_device_unregister_subdev(sd);
> + pm_runtime_disable(&client->dev);
> + mutex_destroy(&isp_dev->lock);
> +}
> +
> +static const struct i2c_device_id thp7312_id[] = {
> + {"thp7312", 0},
Spaces.
> + {},
> +};
> +MODULE_DEVICE_TABLE(i2c, thp7312_id);
This device can't be instantiated on non-DT systems, so I'd drop the
i2c_device_id table.
> +
> +static const struct of_device_id thp7312_dt_ids[] = {
> + { .compatible = "thine,thp7312" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, thp7312_dt_ids);
> +
> +static const struct dev_pm_ops thp7312_pm_ops = {
> + SET_RUNTIME_PM_OPS(thp7312_set_power_off, thp7312_set_power_on, NULL)
> +};
> +
> +static struct i2c_driver thp7312_i2c_driver = {
> + .driver = {
> + .name = "thp7312",
> + .of_match_table = thp7312_dt_ids,
> + },
> + .id_table = thp7312_id,
> + .probe_new = thp7312_probe,
> + .remove = thp7312_remove,
> +};
> +
> +module_i2c_driver(thp7312_i2c_driver);
> +
> +MODULE_DESCRIPTION("THP7312 MIPI Camera Subdev Driver");
> +MODULE_LICENSE("GPL");
No MODULE_AUTHOR() ?
--
Regards,
Laurent Pinchart
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