The 96712 connected to the fourth camera can cause the other three channels to stall

[JiaZW]

Jetson Orin
R34.1.1
The physical connection：
GMSL imx390 * 4 —> 4lane MIPI(CSI a+b) —> Orin

The Issue:
The 96712 connected to the fourth camera can cause the other three channels to stall
Without the fourth camera, the other three are fine

Dts config：
```

                                            active_w = "1920";
                                            active_h = "1080";
                                            mode_type = "yuv";
                                            pixel_phase = "uyvy";
                                            csi_pixel_bit_depth = "8";
                                            dynamic_pixel_bit_depth = "8";
                                            readout_orientation = "0";
                                            line_length = "1920";
                                            inherent_gain = "1";
                                            mclk_multiplier = "5.184";
                    pix_clk_hz = "124416000";
                    serdes_pix_clk_hz = "700000000";

 The actual 96712 output rate is 1.4Gbps/lane

It feels like the rate bandwidth is not enough!! But in practice 1.4Gbps/lane should theoretically be sufficient


Not sure what the problem is ？？？

Ask for help, thank you

[ShaneCCC]

Try boost the clocks to try.
If still the same check the trace log if more information.

sudo su
echo 1 > /sys/kernel/debug/bpmp/debug/clk/vi/mrq_rate_locked
echo 1 > /sys/kernel/debug/bpmp/debug/clk/isp/mrq_rate_locked
echo 1 > /sys/kernel/debug/bpmp/debug/clk/nvcsi/mrq_rate_locked
echo 1 > /sys/kernel/debug/bpmp/debug/clk/emc/mrq_rate_locked
cat /sys/kernel/debug/bpmp/debug/clk/vi/max_rate |tee /sys/kernel/debug/bpmp/debug/clk/vi/rate
cat /sys/kernel/debug/bpmp/debug/clk/isp/max_rate | tee  /sys/kernel/debug/bpmp/debug/clk/isp/rate
cat /sys/kernel/debug/bpmp/debug/clk/nvcsi/max_rate | tee /sys/kernel/debug/bpmp/debug/clk/nvcsi/rate
cat /sys/kernel/debug/bpmp/debug/clk/emc/max_rate | tee /sys/kernel/debug/bpmp/debug/clk/emc/rate