linux-dmabuf-unstable-v1: YUV conversion fails on R-Car board

I developed a Wayland compositor and attempted to display a YUV buffer via DMA Buffer on my Renesas R-Car M3 board. My Wayland client uses GStreamer for streaming content.

However, the egl_create_image function in LinuxDmabufClientBufferIntegration::initYuvTexture failed because the EGL doesn't support the GR88 format.

The conversion rules are defined here.

The supported formats on the R-Car M3 are:

• AB30
• AR24
• AB24
• XR24
• XB24
• RG16
• NV12
• NV21
• YV12
• YU12
• YUYV
• NV16
• IMG2
• YU24
• IMG3
• IMG4

As a workaround, I modified the conversion rule to use the YUYV format, which is supported by the R-Car, and it worked successfully. Please see the attached patch for details.