Hi Christian, On Thu, 30 Mar 2023 at 20:15, Christian Gudrian <c...@ivu.de> wrote:
> We're running a custom Wayland compositor based on Qt Wayland on an i.MX6 > Quad system with a Vivante GC2000 GPU using the Mesa Gallium driver. While > the compositor itself displays correctly, client buffers are displayed with > wrong tiling. > > So far I've found out, that the client's __DRIimage is created by > etna_resource_create with a tiled layout. This image is later passed to > create_wl_buffer which ignores the tiling information and passes the > image's FD to wl_drm_create_prime_buffer. > > If I patch etna_resource_create to always use a linear layout the client's > buffer is displayed correctly. That's certainly not how to do it correctly. > Is there a way to ensure a linear layout for this use case? > You need to force QtWayland to use the wp-linux-dmabuf-v1 platform integration for the compositor. All the others do this automatically but Qt requires an environment variable for this. Cheers, Daniel
