Libcamera FPS regression

[Alexei-Kornienko]

I have a raspberry pi 5 with a camera v2 module (imx219)

When I use old debian version (2024-07-04-raspios-bookworm-arm64.img) it's setup with libcamera version 0.3.2

And when I list my cameras I see:

rpicam-hello --list-cameras
Available cameras
-----------------
0 : imx219 [3280x2464 10-bit RGGB] (/base/axi/pcie@120000/rp1/i2c@88000/imx219@10)
    Modes: 'SRGGB10_CSI2P' : 640x480 [206.65 fps - (1000, 752)/1280x960 crop]
                             1640x1232 [41.85 fps - (0, 0)/3280x2464 crop]
                             1920x1080 [47.57 fps - (680, 692)/1920x1080 crop]
                             3280x2464 [21.19 fps - (0, 0)/3280x2464 crop]
           'SRGGB8' : 640x480 [206.65 fps - (1000, 752)/1280x960 crop]
                      1640x1232 [83.70 fps - (0, 0)/3280x2464 crop]
                      1920x1080 [47.57 fps - (680, 692)/1920x1080 crop]
                      3280x2464 [21.19 fps - (0, 0)/3280x2464 crop]

I can actually read the raw data from sensor at 83 fps.

However for a latest debian and libcamera 0.5 for the same request I get only 100 fps for a 640x480 mode and 42 fps for a 1640x1232. So for me it definetely looks like a regression.

Can you advise a workaround or possibly how to fix this? Cause is seems that sensor is able to provide much higher fps but driver doesn't use it properly.

[naushir]

This is caused by a missing commit in the latest kernel release: raspberrypi/linux#7045.

[Alexei-Kornienko]

Hi. Thanks for your help. I confirm that issue is fixed in kernel 6.12.48