On 09/05/17 02:16, Randy Li wrote: > > > On 05/09/2017 12:27 AM, Heiko St?bner wrote: >> Am Mittwoch, 3. Mai 2017, 10:56:24 CEST schrieb Guillaume Tucker: >>> The ARM Mali Midgard GPU kernel driver is only available >>> out-of-tree and is not going to be merged in its current form. >>> However, it would be useful to have its device tree bindings >>> merged. In particular, this would enable distributions to create >>> working driver packages (dkms...) without having to patch the >>> kernel. >>> >>> The bindings for the earlier Mali Utgard GPU family have already >>> been merged, so this is essentially the same scenario but for >>> newer GPUs (Mali-T604 ~ Mali-T880). >>> >>> This series of patches first imports the bindings from the latest >>> driver release with some clean-up then adds a gpu node for the >>> rk3288 SoC. This was successfully tested on Radxa Rock2 Square, >>> Firefly, Veyron Minnie and Jerry boards using Mali kernel driver >>> r16p0 and r12p0 user-space binary. > I won't suggest such combine. We meet some problems at mali 400 serial. > I would suggest the kernel version would match the user library. Well, I can test it again with r12p0 kernel driver (out-of-tree) if you want. The user-space driver checks the version of the kernel driver and gives up if it's not compatible. With Midgard, there's a range of versions that maintain kernel/userspace compatibility unlike Utgard and older Midgard releases where they had to exactly match. Again, if there was a mismatch then the user-space would fail to initialise and report an error. > Also please notice there is rk3288w, the hardware version becomes r1p0. Sounds like a new SoC? Does rk3288w affect rk3288 in any way? Unless it's a special case, it seems to me that any new SoC with a Midgard GPU would need an extra vendor compatible string in the binding documentation and maybe a separate gpu dt node. >> The actual devicetree parts are all Rockchip-specific, so I guess I'll just >> pick up the whole series, including the binding doc, after the merge >> window if nobody complains before that :-) Thanks! Guillaume
