[Mesa-dev] Can't get self-built Mesa to work on the Raspberry Pi 4

[Iago Toral]

Hi Lukas,

you need:

-Dgallium-drivers=v3d,vc4,kmsro

Iago

On Wed, 2021-01-06 at 12:22 +0100, lists at luckyxxl.de wrote:
> Hi all,
> 
> In order to check whether a OpenGL ES driver bug I'm hitting on the 
> Raspberry Pi 4 still appears in the latest Mesa version, I'm trying
> to 
> build Mesa myself and run my application with that. Unfortunately
> I'm 
> having no success with either 19.3.2 (the version distributed with 
> raspbian), 20.3.2 (the latest release) or the current master. Each
> time 
> the driver initialization fails with the following messages printed
> to 
> the console:
> 
> libGL error: failed to create dri screen
> libGL error: failed to load driver: vc4
> 
> This is my meson setup command line:
> 
> ~/Downloads/meson-0.56.0/meson.py setup -Ddri-drivers= 
> -Dgallium-drivers=v3d,vc4 -Dvulkan-drivers= -Dplatforms=x11 
> -Dbuildtype=debug -Dbackend=ninja -Dprefix=/home/pi/mesa-build build
> 
> (vc4 seems to be required in the gallium-drivers option, otherwise
> it 
> failed with 'libGL error: MESA-LOADER: failed to open vc4 [...]'. I 
> guess this makes sense given the dependency on vc4 as explained here 
> https://docs.mesa3d.org/drivers/v3d.html ?)
> 
> I'm having this issue using both SDL or freeglut and either starting
> the 
> app from ssh (using 'export DISPLAY=:0') or directly on the desktop.
> 
> I'm a total beginner when it comes to Mesa and the pi graphics
> driver 
> stack, so any help would be highly appreciated :) Thanks!
> 
> Lukas
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