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backend/drm: re-use FBs #2568
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backend/drm: re-use FBs #2568
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This will be useful once we start re-using wlr_drm_fb.
Stop keeping track of buffers on the parent GPU when multi-GPU is used. This removes support for export_dmabuf on secondary GPUs, but renderer v6 will bring this back by managing the swapchains in wlr_output instead of the backends.
Instead of importing buffers to GBM and KMS at each frame, cache them and re-use them while the wlr_buffer is alive. This is the same as [1] and [2] but for the DRM backend. [1]: swaywm#2538 [2]: swaywm#2539
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Instead of importing buffers to GBM and KMS at each frame, cache them and re-use them while the wlr_buffer is alive.
This is the same as #2538 and #2539 but for the DRM backend.
Closes: #2276