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authorSimon Ser <contact@emersion.fr>2022-05-27 13:21:55 +0200
committerSimon Ser <contact@emersion.fr>2022-06-01 21:16:02 +0200
commitacc6d94db048118e7e910d7812431dfb27b2d769 (patch)
tree3d4c0f20150501c0f741673257887330f0a55a04 /tinywl
parente383c1f1db37c6d2de8f070603a89230f876bc80 (diff)
backend/drm: make commits without a buffer blocking
The wlr_output API requires compositors to wait for wlr_output.frame before submitting a new buffer. However, compositors can perform a commit which doesn't involve a buffer anytime. If the commit is a modeset, we set DRM_MODE_ATOMIC_ALLOW_MODESET and block until the commit is done. If it isn't, we currently always perform a non-blocking commit. This is an issue because a previous page-flip might still be in flight kernel-side, returning EBUSY. Fix this by using blocking commits when a buffer isn't submitted by the compositor. Closes: https://github.com/swaywm/sway/issues/6962 References: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/2239
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