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Having a fence linked to a virtio_gpu_framebuffer in the plane update sequence would cause conflict when several planes referencing the same framebuffer (e.g. Xorg screen covering multi-displays configured for an extended mode) and those planes are updated concurrently. So it is needed to allocate a fence for every plane state instead of the framebuffer. Signed-off-by: Dongwon Kim <dongwon.kim@intel.com> [dmitry.osipenko@collabora.com: rebase, fix up, edit commit message] Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> Acked-by: Vivek Kasireddy <vivek.kasireddy@intel.com> Reviewed-by: Rob Clark <robdclark@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241020230803.247419-2-dmitry.osipenko@collabora.com