2018-09-12 17:13 GMT+02:00 Peter Robinson <pbrobinson@xxxxxxxxx>: >> In short, this FLOSS driver allows to enable video acceleration with >> vdpau on older tegra soc. > > How does this relate to the tegr-vde driver for video acceleration > that's already in the upstream kernel[1] , albeit in staging, that > supports tegra20-114 now. The tegra-vde driver is used unmodified by the tegra vdpau backend But the libvdpau-tegra backend requires few missing patches from the grate-driver modified libdrm. That's the patches I hope to see merged once the kernel ABI for tegra drm is unstaged. Then there is a need for a video output. Without a good opengl driver, the best choice is currently to use the legacy Xv video output. This can be granted by using the opentegra DDX which also requires the modified libdrm. Using the modified libdrm, libvdpau-tegra and modified xorg-x11-drv-opentegra is enough to get video acceleration. Using the modified mesa will allow to use the DRI2 framework to autodetect the appropriate vdpau backend. >> There is also a very basic mesa driver, but it only advertise opengl >> 1.4 and gles 2.0 (probably not really conformant even). At least it >> doesn't crash with glxgears. >> There is support up to Tegra114, Tegra K1 may comes later using the >> same framework. > > There's also a patch series to add 124 AKA TK1 support [2] and once > they add support for the v4l requests API [3] this should all work > OOTB with standard mesa AFAICT. So my question is how does grate fit > into / relate to the upstream work? I've only tested this patch WRT older hardware and it breaks video acceleration. v4l requests API is the way forward indeed, I haven't seen any code for Tegra, There are plans. I don't know yet about the userspace, but at least there is a bridge for vaapi enabled applications. About grate and upstream, it's still un-clear if there will be two drivers or only one within mesa -- - Nicolas (kwizart) _______________________________________________ arm mailing list -- arm@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to arm-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/arm@xxxxxxxxxxxxxxxxxxxxxxx
