> Since the same discussion is happening with etnaviv: Why exactly does mesa > need to mmap imported buffers? The golden question! Seemingly, (one of the) reasons is that the state tracker does colourspace conversion in software if the winsys wants a format that the driver doesn't advertise. Unrelated to this, that's almost certainly a performance issue and might explain quite a bit... In this case, the winsys seems to want RGB10_A2 but we settle for RGBA8. I thought that was just changing EGL negotiation stuff.. I had no idea it was covering up in software... not good...
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