Hello,
We have developed cmos gray-scale sensor driver for TX2, based on the NVidia’s file imx274.c
The driver works is in progress in L4T 28.1
Now we have ported the driver to L4T 28.1, observing the recommendations in the documentation.
(Jetson TX2 Camera BringUp - eLinux.org)
firstly, I need to explain my camera system to get the exact information.
My system is as below.
CMOS Sesor Camera --(LVDS)—> MAX9288 --(CSI2)–> Tegra CSI port
CMSO Sensor Camera is LVDS camera and gray-scale camera. so I used lattice MAX9288 to convert LVDS to CSI.
Second,
Due to camera driver changes, the imx274 kernel module driver only raises the module, and the actual driver initialization is handled in the user area.
-
New camera and csi setting dtsi script : platform/t18x/quill/kernel-dts/guill-modules/tegra186-camera-imx274.dtsi
i2c@3180000 {
imx274_a@1a {
compatible = “nvidia,imx274”;
/* I2C device address */
reg = <0x1a>;/* V4L2 device node location */ devnode = "video0"; /* Physical dimensions of sensor */ physical_w = "3.674"; physical_h = "2.738"; sensor_model ="imx274"; mode0 { mclk_khz = "24000"; num_lanes = "4"; tegra_sinterface = "serial_a"; discontinuous_clk = "yes"; dpcm_enable = "false"; cil_settletime = "0"; active_w = "3840"; active_h = "2160"; [b]pixel_t = "raw_uyvy"; # gray format[/b] readout_orientation = "90"; line_length = "4208"; inherent_gain = "1"; mclk_multiplier = "24"; pix_clk_hz = "576000000"; min_gain_val = "1.0"; max_gain_val = "16.0"; min_hdr_ratio = "1"; max_hdr_ratio = "1"; min_framerate = "1.5"; max_framerate = "60"; min_exp_time = "16.165"; max_exp_time = "666637"; embedded_metadata_height = "1"; };
our cmos camera is a gray-scale sensor (1280x800).
We have added support for 8-bit and 10-bit gray formats “raw_uyvy” in the following kernel files:
-
New media bus format(s) in camera_common.c:
static const struct camera_common_colorfmt camera_common_color_fmts = {
[b]// add
{
MEDIA_BUS_FMT_UYVY8_2X8,
V4L2_COLORSPACE_JPEG,
V4L2_PIX_FMT_UYVY,
},
{
MEDIA_BUS_FMT_VYUY8_2X8,
V4L2_COLORSPACE_JPEG,
V4L2_PIX_FMT_VYUY,
},{
MEDIA_BUS_FMT_YUYV8_2X8,
V4L2_COLORSPACE_JPEG,
V4L2_PIX_FMT_YUYV,
},{
MEDIA_BUS_FMT_YVYU8_2X8,
V4L2_COLORSPACE_JPEG,
V4L2_PIX_FMT_YVYU,
},{
MEDIA_BUS_FMT_UYVY8_1X16,
V4L2_COLORSPACE_JPEG,
V4L2_PIX_FMT_UYVY,
},{
MEDIA_BUS_FMT_VYUY8_1X16,
V4L2_COLORSPACE_JPEG,
V4L2_PIX_FMT_VYUY,
},{
MEDIA_BUS_FMT_YUYV8_1X16,
V4L2_COLORSPACE_JPEG,
V4L2_PIX_FMT_YUYV,
},{
MEDIA_BUS_FMT_YVYU8_1X16,
V4L2_COLORSPACE_JPEG,
V4L2_PIX_FMT_YVYU,
}, [/b]
} -
New device-tree pixel formats in sensor_common.c:
static int extract_pixel_format(
const char *pixel_t, u32 *format)
{
size_t size = strnlen(pixel_t, OF_MAX_STR_LEN);if (strncmp(pixel_t, “bayer_bggr10”, size) == 0)
*format = V4L2_PIX_FMT_SBGGR10;
else if (strncmp(pixel_t, “bayer_rggb10”, size) == 0)
*format = V4L2_PIX_FMT_SRGGB10;
else if (strncmp(pixel_t, “bayer_bggr12”, size) == 0)
*format = V4L2_PIX_FMT_SBGGR12;
else if (strncmp(pixel_t, “bayer_rggb12”, size) == 0)
*format = V4L2_PIX_FMT_SRGGB12;
else if (strncmp(pixel_t, “bayer_wdr_pwl_rggb12”, size) == 0)
*format = V4L2_PIX_FMT_SRGGB12;
else if (strncmp(pixel_t, “bayer_xbggr10p”, size) == 0)
*format = V4L2_PIX_FMT_XBGGR10P;
else if (strncmp(pixel_t, “bayer_xrggb10p”, size) == 0)
*format = V4L2_PIX_FMT_XRGGB10P;
else if (strncmp(pixel_t, “raw_uyvy”, size) == 0)// add
*format = V4L2_PIX_FMT_UYVY;
else {
pr_err(“%s: Need to extend format%s\n”, func, pixel_t);
return -EINVAL;
}return 0;
}
int camera_common_try_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt mf)
{
if (i == s_data->numfmts) {
// org, disabled by shchoi
/
mf->width = s_data->fmt_width;
mf->height = s_data->fmt_height;
dev_dbg(&client->dev,
“%s: invalid resolution supplied to set mode %d %d\n”,
func, mf->width, mf->height);
*/
// add
s_data->fmt_width = mf->width;
s_data->fmt_height = mf->height;
goto verify_code;
}
}
Attachments - RAW8 Gray Capture image
Screenshot from 2019-08-07 17-21-54.png
