Hi,
Using EGL with the GBM platform it is possible to bind a GBM surface to
a GL renderbuffer. I believe it's also valid to use the GBM BO as a
framebuffer target with drmModeAddFB/drmModePageFlip.
I haven't been able to locate a clear statement on synchronizing GL
operations with the DRM page flip in the extension specifications.
gallium/radeonsi does not unpack a GBM BO's fast cleared cmask on
glFlush, leading to desync between the GL and DRM views of the GBM BO.
Could somebody with a better understanding of the EGL synchronization
semantics suggest how this might be handled?
--
Jay Cornwall
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