'Could not open any dmaHeap device' FIX

[albmef]

Hi ! using last 1.9 image (up to date) on a PI4_4GB with HQ camera.

the rpicam-apps need to be launch with sudo due to an access permission error to dma_heap device i propose a new udev rule to be added.

step to reproduce : ~ » rpicam-hello -n -t 1 Could not open any dmaHeap device [2:40:33.915193935] [4981] ERROR IPAModule ipa_module.cpp:172 Symbol ipaModuleInfo not found [2:40:33.915225268] [4981] ERROR IPAModule ipa_module.cpp:292 v4l2-compat.so: IPA module has no valid info [2:40:33.915280767] [4981] INFO Camera camera_manager.cpp:313 libcamera v0.3.0 [2:40:33.934882193] [4982] ERROR DmaBufAllocator dma_buf_allocator.cpp:116 Could not open any dma-buf provider [2:40:33.955290260] [4982] WARN RPiSdn sdn.cpp:40 Using legacy SDN tuning - please consider moving SDN inside rpi.denoise [2:40:33.957514762] [4982] ERROR RPI vc4.cpp:215 Failed to register camera imx477 10-001a: -12 ERROR: no cameras available

if we launch with sudo we get: ~ » sudo rpicam-hello -n -t 1 [2:40:23.408419338] [4968] ERROR IPAModule ipa_module.cpp:172 Symbol ipaModuleInfo not found [2:40:23.408504393] [4968] ERROR IPAModule ipa_module.cpp:292 v4l2-compat.so: IPA module has no valid info [2:40:23.408565522] [4968] INFO Camera camera_manager.cpp:313 libcamera v0.3.0 [2:40:23.447409709] [4969] WARN RPiSdn sdn.cpp:40 Using legacy SDN tuning - please consider moving SDN inside rpi.denoise [2:40:23.449793950] [4969] INFO RPI vc4.cpp:446 Registered camera /base/soc/i2c0mux/i2c@1/imx477@1a to Unicam device /dev/media2 and ISP device /dev/media1 [2:40:23.449894283] [4969] INFO RPI pipeline_base.cpp:1104 Using configuration file '/usr/share/libcamera/pipeline/rpi/vc4/rpi_apps.yaml' Mode selection for 2028:1520:12:P SRGGB10_CSI2P,1332x990/0 - Score: 3456.22 SRGGB12_CSI2P,2028x1080/0 - Score: 1083.84 SRGGB12_CSI2P,2028x1520/0 - Score: 0 SRGGB12_CSI2P,4056x3040/0 - Score: 887 [2:40:23.450712629] [4968] INFO Camera camera.cpp:1183 configuring streams: (0) 2028x1520-YUV420 (1) 2028x1520-SBGGR12_CSI2P [2:40:23.451058996] [4969] INFO RPI vc4.cpp:621 Sensor: /base/soc/i2c0mux/i2c@1/imx477@1a - Selected sensor format: 2028x1520-SBGGR12_1X12 - Selected unicam format: 2028x1520-pBCC

QUICK FIX derived from this thread: https://raspberrypi.stackexchange.com/questions/141106/how-to-fix-the-libcamera-error-could-not-open-any-dmaheap-device

add an udev rule in /etc/udev/rules.d/98-picamera.rules add the following rule: SUBSYSTEM=="dma_heap", GROUP="video", MODE="0660"

save, close, then reload the rules (no need to reboot) sudo udevadm control --reload-rules && sudo udevadm trigger

now retry without sudo: ~ » rpicam-hello -n -t 1 [2:50:47.813489346] [5363] ERROR IPAModule ipa_module.cpp:172 Symbol ipaModuleInfo not found [2:50:47.813586086] [5363] ERROR IPAModule ipa_module.cpp:292 v4l2-compat.so: IPA module has no valid info [2:50:47.813667196] [5363] INFO Camera camera_manager.cpp:313 libcamera v0.3.0 [2:50:47.853982706] [5364] WARN RPiSdn sdn.cpp:40 Using legacy SDN tuning - please consider moving SDN inside rpi.denoise [2:50:47.856210153] [5364] INFO RPI vc4.cpp:446 Registered camera /base/soc/i2c0mux/i2c@1/imx477@1a to Unicam device /dev/media2 and ISP device /dev/media1 [2:50:47.856316078] [5364] INFO RPI pipeline_base.cpp:1104 Using configuration file '/usr/share/libcamera/pipeline/rpi/vc4/rpi_apps.yaml' Mode selection for 2028:1520:12:P SRGGB10_CSI2P,1332x990/0 - Score: 3456.22 SRGGB12_CSI2P,2028x1080/0 - Score: 1083.84 SRGGB12_CSI2P,2028x1520/0 - Score: 0 SRGGB12_CSI2P,4056x3040/0 - Score: 887 [2:50:47.857093164] [5363] INFO Camera camera.cpp:1183 configuring streams: (0) 2028x1520-YUV420 (1) 2028x1520-SBGGR12_CSI2P [2:50:47.857437273] [5364] INFO RPI vc4.cpp:621 Sensor: /base/soc/i2c0mux/i2c@1/imx477@1a - Selected sensor format: 2028x1520-SBGGR12_1X12 - Selected unicam format: 2028x1520-pBCC

TADAAAWWWWWW !

regards, bob

[MattBlack85]

I pack some dev rules for the PI already, I will add this as well so it will work out of the box

[albmef]

thanks in which package did you put the new udev rules please ? bob

[MattBlack85]

@albmef the fix has been shipped with rpicam-apps, update-astroarch will update it to the latest version and you should see no more errors