[core] demo's not working rpi4 kernel 5.10

[jamieS95]

demo's not working rpi4 kernel 5.10 with newest mesa from the repo and kms enabled

INFO: Initializing raylib 3.5
INFO: DISPLAY: No graphic card set, trying card1
INFO: DISPLAY: Selected DRM connector mode 800x600 (800x600p@60)
INFO: DISPLAY: Upscaling required: Screen size (800x450) smaller than display size (800x600)
INFO: DISPLAY: Device initialized successfully
INFO: > Display size: 800 x 600
INFO: > Render size: 800 x 600
INFO: > Screen size: 800 x 450
INFO: > Viewport offsets: 0, 150
INFO: GL: OpenGL device information:
INFO: > Vendor: Broadcom
INFO: > Renderer: V3D 4.2
INFO: > Version: OpenGL ES 3.1 Mesa 21.0.0-devel (git-9ef2c44ce6)
INFO: > GLSL: OpenGL ES GLSL ES 3.10
INFO: GL: Supported extensions count: 88
INFO: GL: VAO extension detected, VAO functions initialized successfully
INFO: GL: NPOT textures extension detected, full NPOT textures supported
INFO: GL: DXT compressed textures supported
INFO: GL: ETC1 compressed textures supported
INFO: TEXTURE: [ID 1] Texture created successfully (1x1 - 1 mipmaps)
INFO: TEXTURE: [ID 1] Default texture loaded successfully
INFO: SHADER: [ID 1] Compiled successfully
INFO: SHADER: [ID 2] Compiled successfully
INFO: SHADER: [ID 3] Program loaded successfully
INFO: SHADER: [ID 3] Default shader loaded successfully
INFO: RLGL: Internal vertex buffers initialized successfully in RAM (CPU)
INFO: RLGL: Render batch vertex buffers loaded successfully
INFO: RLGL: Default state initialized successfully
INFO: TEXTURE: [ID 2] Texture created successfully (128x128 - 1 mipmaps)
INFO: FONT: Default font loaded successfully
INFO: RPI: Opening input device: /dev/input/event2 (mouse )
INFO: RPI: Opening input device: /dev/input/event0 (keyboard )
WARNING: RPI: Failed to open Gamepad device, no gamepad available
WARNING: RPI: Failed to change keyboard mode (SSH keyboard?)
INFO: TIMER: Target time per frame: 16.667 milliseconds
ERROR: DISPLAY: drmModeSetCrtc() failed with result: -13

[raysan5]

Ouch... Maybe @KernelKinetic could take a look?

Since drmModeSetCrtc() applies the settings to the screen controller and -13 looks like -ENOACCES maybe there is just something wrong with some access rights and a quick sudo ... test should work to run the demonstration examples again, @jamieS95?

[AudioMorphology]

I have seen this too, when compiling for PLATFORM_DRM and running within a Terminal session on the Pi desktop - seems the app isn't able to set Crtc as it's not Master. Presumably the desktop is already master. Running as sudo makes no difference - I tried patching core.c to call drmSetMaster(3); prior to drmModeSetCrtc() but that didn't fix it.

@jamieS95 Set the Pi to boot to Command Line rather than desktop, and re-run the compiled example from there - you'll probably find it runs fine. That's what I'm doing at present until I find a fix.

[raysan5]

@AudioMorphology Oh, yeah, you are right, I also found the same issue... actually PLATFORM_DRM is expected to run with no desktop, to run raylib on desktop, then compile it for PLATFORM_DESKTOP.

EDIT: As a side note, previous PLATFORM_RPI implementation (using videocore libraries) allowed getting the screen as master even on desktop...

[jamieS95]

@raysan5
would having the api like this have any benefit?

https://github.com/raysan5/raylib/wiki/Working-on-Raspberry-Pi
*maybe some changes for opengl 2.0, open gl es, drm...

//native without windowing system (use from command line)
make PLATFORM=PLATFORM_NATIVE
//x11 windowing system (use from desktop)
make PLATFORM=PLATFORM_WINDOWED

[raysan5]

@jamieS95 Actually, PLATFORM_DESKTOP is correct, it does not have to be WINDOWED...

About PLATFORM_NATIVE, maybe it could be reviewed in a future but no plans for now.

Does it work with the proposed solutions?

[jamieS95]

booting to cli solved issue. thank you

[colesnicov]

So. I've just installed freshely on my Raspberry PI 2B an Raspberry OS Lite + openbox + xfce4-panel. And I did try to compile sources successfuly. Trying to compile examples and I have got #3487 (comment) error.

When I tried raylib 3 years ago, it didn't work with RPI 2B (I still have the same one :D), but now it does.

So I want to ask:

• if I want to run raylib under openbox, do I have to compile like this: make PLATFORM=PLATFORM_DESKTOP?
• I have to specify the opengl version, something like GRAPHICS=GRAPHICS_API_OPENGL_21?

Maybe it should be mentioned in the wiki that DRM can only be started from the CLI and can cause such an error: ERROR: DISPLAY: drmModeSetCrtc() failed with result: -13

Thank you.

[raysan5]

Hi! RaspberryPi drivers have changed a lot in the last few years. Glad to know it works as expected with latest update.

About your questions:

if I want to run raylib under openbox, do I have to compile like this: make PLATFORM=PLATFORM_DESKTOP?

I'm afraid I don't know, I never used openbox. It should be tested.

I have to specify the opengl version, something like GRAPHICS=GRAPHICS_API_OPENGL_21?

Yes, PLATFORM_DESKTOP requires OpenGL 2.1 and PLATFORM_DRM requires OpenGL ES 2.0.

Maybe it should be mentioned in the wiki that DRM can only be started from the CLI and can cause such an error: ERROR: DISPLAY: drmModeSetCrtc() failed with result: -13

The Wiki is open to everyone for editing, feel free to add that info on Raspberry Pi section.

[colesnicov]

I have to specify the opengl version, something like GRAPHICS=GRAPHICS_API_OPENGL_21?

Yes, PLATFORM_DESKTOP requires OpenGL 2.1 and PLATFORM_DRM requires OpenGL ES 2.0.

However, as I can see on the dependencies page on the wiki (https://github.com/raysan5/raylib/wiki/raylib-dependencies) , it requires X11 in the DESKTOP configuration and that already contradicts what I tried with OS LITE + OPENBOX..

[colesnicov]

The Wiki is open to everyone for editing, feel free to add that info on Raspberry Pi section.

Succeess.