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drm/gud: Enable synchronous flushing by default
gud has a module parameter that controls whether framebuffer flushing happens synchronously during the commit or asynchronously in a worker. GNOME before version 3.38 handled all displays in the same rendering loop. This lead to gud slowing down the refresh rate for a faster monitor. This has now been fixed so lets change the default. The plan is to remove async flushing in the future. The code is now structured in a way that makes it easy to do this. Link: https://blogs.gnome.org/shell-dev/2020/07/02/splitting-up-the-frame-clock/ Suggested-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Link: https://patchwork.freedesktop.org/patch/msgid/20221122-gud-shadow-plane-v2-6-435037990a83@tronnes.org
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