MIPI camera image has black line

[hello_carbot]

Test Environment:
Xavier-NX , Jetpack 4.6
mipi sensor: AR0135 + TC358748XBG

Capture raw10 image (640x480) from v4l2 and convert it to raw8:
640x480 has black line:
raw8_640_480.bmp (301.1 KB)

convert the same data to 1280x240:
raw8_640_480_to_1280_240.bmp (301.1 KB)

And the full size (1280x960) image is correct.

We already verify the mipi signal output:
V:
right part is parallel input, left part is mipi signal

H:
right part is parallel input, left part is mipi signal

Device tree:

                mode2 { // AR0135_MODE_640X480_105FPS
					mclk_khz = "27000";  // ar0135 and tc358748 use same clock freq
					num_lanes = "2";
					tegra_sinterface = "serial_a";
					phy_mode = "DPHY";
					discontinuous_clk = "yes";
					dpcm_enable = "false";
					cil_settletime = "0";

					active_w = "640";
					active_h = "480";
					pixel_t = "bayer_rggb";
					readout_orientation = "0";
					line_length = "1388";
					inherent_gain = "1";
					mclk_multiplier = "3.2";  // (tc358748_mipi) 86400000 / 27000000
					pix_clk_hz = "86400000";  // (tc358748_mipi) 432 (Mbps/lane) * 2 (lanes) / 10 (bits/pix)

					gain_factor = "100000";  // 1x (w/o column gain)
					framerate_factor = "1000000";  // don't care
					exposure_factor = "1000000";  // don't change
					min_gain_val = "100000";  // 1x (w/o column gain)
					max_gain_val = "797000";  // 7.97x (w/o column gain)
					step_gain_val = "3125";  // 0.03125x (w/o column gain)
					default_gain = "100000";  // 1x (w/o column gain)
					min_hdr_ratio = "1";  // don't care
					max_hdr_ratio = "1";  // don't care
					min_framerate = "2000000";  // 2 fps @ 500 ms exp time
					max_framerate = "105000000";  // 105 fps
					step_framerate = "1";  // don't care
					default_framerate = "105000000";  // 105 fps
					// ar0135_pix_clk_hz here is 74300000 Hz
					min_exp_time = "100";  // (us) 1388 px * 5 (line_length) / ar0135_pix_clk_hz * 1000000 -> 18.681us
					max_exp_time = "499997";  // (us) 26765(maximum coarse integration time) * line_length / ar0135_pix_clk_hz * 1000000 -> 499997.5774us
					step_exp_time = "1";  // (us) 1 / ar0135_pix_clk_hz -> 0.013us
					default_exp_time = "1868";  // 1388 * 100 / ar0135_pix_clk_hz * 1000000 -> 1868.102us

					embedded_metadata_height = "0";
				};

Could anybody suggest how to fix it ?

[JerryChang]

hello hello_carbot,

may I know what’s your commands to capture the pattern and convert it as Raw8?
could you please use the v4l standard utility to dump the stream for confirmation.
for example,
$ v4l2-ctl -d /dev/video0 --set-fmt-video=width=2592,height=1944,pixelformat=RG10 --set-ctrl bypass_mode=0 --stream-mmap --stream-count=1 --stream-to=test.raw