Quoting Thierry Reding (2018-01-11 22:22:46) > From: Thierry Reding <treding@xxxxxxxxxx> > > This set of patches adds support for fences to Tegra DRM and complements > the fence FD support for Nouveau. Technically this isn't necessary for a > fence-based synchronization loop with Nouveau because the KMS core takes > care of all that, but engines behind host1x can use the IOCTL extensions > provided here to emit fence FDs that in turn can be used to synchronize > their jobs with either the scanout engine or the GPU. Whilst hooking up fences, I advise you to also hook up drm_syncobj. Internally they each resolve to another fence, so the mechanics are identical, you just need another array in the uABI for in/out syncobj. The advantage of drm_syncobj is that userspace can track internal fences using inexhaustible handles, reserving the precious fd for IPC or KMS. -Chris -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
