Does TX2 support MIPI CSI-2 1-lane?

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

Hi, all

I have the ADV7282M (Single-lane CSI-2 signal) connected to the TX2’s CSI-A as below.

ADV7282M --------- TX2

CLK ---------------> CLK_0
D0 -----------------> D0

Is that correct ?

Thanks for help.

2

Hi,
Yes any Jetson TX2 CSI can support use only low lane for x1 case.
Your connect mapping is correct.
Thanks.

3

Hi,

Thanks for reply.

My camera outputs YUV422 stream, so, I modified the source file sensor_common.c to support UVUY format, after
that I wrote a device-tree file base on the example(2-lane case). Yes, it worked. I got six input by using v4l2-API, it’s amazing.

When I changed the bus-with( in the .dtsi file) from 2-lane to 1-lane, and connect the ADV7282M to D0，and add
720x576@50Hz to driver, unfortunately, it did not work in 1-lane case. The fault must be somewhere I can’t find, can you give me some advice ?

Thanks.

4

hello chivstyle,

you should also consider the pixel clock settings if you change MIPI configuration from two lane to one lane.
please review Sensor Pixel Clock and check your pixel_clk_hz property settings,
thanks

5

Hello JerryChang,

Thanks for reply. The ADV728x-M outputs video data in an 8-bit YCrCb 4:2:2 format, at a nominal data rate of 432 Mbps. So I modifiy the mode0 like bellow.

pixel_clk_hz = 432000000 / 16 = 27Mhz, or 864x625x50=27Mhz, by the way the calculation in “Sensor Pixel Clock” seems to be wrong, for example

pixel_clk_hz = 2200 * 1125 * 30 = 742500000, there’s an extra 0 after the result, ten times of original one

mode0 {
/* 720x576, 50 FPS */
mclk_khz = “24000”;
num_lanes = “1”;
tegra_sinterface = “serial_a”;
discontinuous_clk = “no”;
dpcm_enable = “false”;
cil_settletime = “0”;
dynamic_pixel_bit_depth = “8”;
csi_pixel_bit_depth = “8”;
mode_type = “yuv”;
pixel_phase = “uyvy”;

            active_w = "720";
            active_h = "576";
            readout_orientation = "0";
            line_length = "864";
            inherent_gain = "1";
            mclk_multiplier = "1.125";
            pix_clk_hz = "27000000";

            min_gain_val = "0";
            max_gain_val = "48";
            min_hdr_ratio = "1";
            max_hdr_ratio = "1";
            min_framerate = "1.5";
            max_framerate = "60";
            min_exp_time = "30";
            max_exp_time = "660000";
            embedded_metadata_height = "0";
        };

But I got this error.

[ 196.866328] tegra_mipi_cal 3990000.mipical: Mipi cal timeout,val:2018970, lanes:6000000
[ 196.866376] tegra_mipi_cal 3990000.mipical: MIPI_CAL_CTRL 0x04 0x2a000010
[ 196.866408] tegra_mipi_cal 3990000.mipical: CIL_MIPI_CAL_STATUS 0x0c 0x02018970
[ 196.866437] tegra_mipi_cal 3990000.mipical: CIL_MIPI_CAL_STATUS_2 0x10 0x00000000
[ 196.866463] tegra_mipi_cal 3990000.mipical: CILA_MIPI_CAL_CONFIG 0x18 0x00000000
[ 196.866488] tegra_mipi_cal 3990000.mipical: CILB_MIPI_CAL_CONFIG 0x1c 0x00000000
[ 196.866513] tegra_mipi_cal 3990000.mipical: CILC_MIPI_CAL_CONFIG 0x20 0x00000000
[ 196.866537] tegra_mipi_cal 3990000.mipical: CILD_MIPI_CAL_CONFIG 0x24 0x00000000
[ 196.866561] tegra_mipi_cal 3990000.mipical: CILE_MIPI_CAL_CONFIG 0x28 0x00000000
[ 196.866585] tegra_mipi_cal 3990000.mipical: CILF_MIPI_CAL_CONFIG 0x2c 0x00200000
[ 196.866609] tegra_mipi_cal 3990000.mipical: DSIA_MIPI_CAL_CONFIG 0x3c 0x00000200
[ 196.866633] tegra_mipi_cal 3990000.mipical: DSIB_MIPI_CAL_CONFIG 0x40 0x00000200
[ 196.866657] tegra_mipi_cal 3990000.mipical: DSIC_MIPI_CAL_CONFIG 0x44 0x00000200
[ 196.866681] tegra_mipi_cal 3990000.mipical: DSID_MIPI_CAL_CONFIG 0x48 0x00000200
[ 196.866705] tegra_mipi_cal 3990000.mipical: MIPI_BIAS_PAD_CFG0 0x5c 0x00000000
[ 196.866729] tegra_mipi_cal 3990000.mipical: MIPI_BIAS_PAD_CFG1 0x60 0x00000000
[ 196.866753] tegra_mipi_cal 3990000.mipical: MIPI_BIAS_PAD_CFG2 0x64 0x00010010
[ 196.866776] tegra_mipi_cal 3990000.mipical: DSIA_MIPI_CAL_CONFIG_2 0x68 0x00000002
[ 196.866800] tegra_mipi_cal 3990000.mipical: DSIB_MIPI_CAL_CONFIG_2 0x6c 0x00000002
[ 196.866824] tegra_mipi_cal 3990000.mipical: DSIC_MIPI_CAL_CONFIG_2 0x74 0x00000002
[ 196.866847] tegra_mipi_cal 3990000.mipical: DSID_MIPI_CAL_CONFIG_2 0x78 0x00000002
[ 196.866876] nvcsi 150c0000.nvcsi: calibration failed with -110 error
[ 197.870387] tegra-vi4 15700000.vi: PXL_SOF syncpt timeout! err = -11
[ 198.870391] tegra-vi4 15700000.vi: PXL_SOF syncpt timeout! err = -11
[ 199.870386] tegra-vi4 15700000.vi: PXL_SOF syncpt timeout! err = -11

6

hello chivstyle,

thanks for point-out the typo, I would ask internal team for documentation update.

  1. since your sensor output 720x576@50Hz, you should also update the max_framerate property to 50-fps.
  2. below failure means VI engine cannot receive the sensor signaling,
    please refer to https://elinux.org/Jetson_TX2_Camera_BringUp to enable more debug messages.
    thanks
[ 197.870387] tegra-vi4 15700000.vi: PXL_SOF syncpt timeout! err = -11
[ 198.870391] tegra-vi4 15700000.vi: PXL_SOF syncpt timeout! err = -11
[ 199.870386] tegra-vi4 15700000.vi: PXL_SOF syncpt timeout! err = -11