Daniel Vetter <daniel.vet...@ffwll.ch> writes: > I've done a lot of history digging. The first signs of this > optimization was introduced in i915:
I can't come up with any reason this would matter. I almost came up with "You're doing tearing X11 front buffer rendering, and you do a modeset using the same fb, and so you block that modeset behind your rendering." Except that: 1) who cares 2) this helper is only for dma-bufs, not normal X11 rendering 3) your X11 driver should be doing pageflipping to be tear-free anyway, let's just fix that[1]. Reviewed-by: Eric Anholt <e...@anholt.net> [1] This is not actually me volunteering myself or anyone else to go fix that.
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