This series adds support for the Mali-450 GPU on Meson8 and Meson8b. Meson6 uses a Mali-400 GPU but since we don't have a clock driver (and I don't have a device for testing) Meson6 is left out in this series. Meson8 uses a Mali-450 MP6 with six pixel processors. Meson8b (as cost-reduced SoC) uses a Mali-450 MP2 with two pixel processors. I tested both using the open source lima driver and a patched mesa from the lima project as well. Since we don't have display support on the 32-bit SoCs I used off-screen rendering as described in [0]. The result is (for example): [1] The bootloader (at least on my boards) leaves the Mali clock disabled by default. The board crashes when trying to access the Mali registers with the "core" clock disabled. Thus this series also implements the required clock driver changes. The Mali clock tree on Meson8b and Meson8m2 is almost identical to the one on GXBB (see the description of patch #3 for more details). Only Meson8 is slightly different as it doesn't have a glitch-free mux. Patch #2 prepares the meson8b clock driver so we can have different clocks per SoC. Dependencies: - the .dts changes depend on my other series "ARM: dts: meson: add the APB/APB2 busses" from [2] - the .dts changes from this series have no compile-time dependency on the clock driver changes because CLKID_MALI was defined in the dt-bindings since the first version of the clock driver (but it was not used until now). - the .dts changes from this series have a runtime dependency on the clock driver changes (also from this series) if you have a kernel patched with the lima driver (without the lima driver there's no runtime dependency) Other notes: By default the GPU runs off the XTAL clock (24MHz). The lima driver currently does not update the GPU clock rate. Different frequencies have to be requested by adding the following properties to the Mali GPU node (to run it at 510MHz for example): assigned-clocks = <&clkc CLKID_MALI>; assigned-clock-rates = <510000000>; [0] https://gitlab.freedesktop.org/lima/web/wikis/home [1] https://abload.de/img/dump0myic0.png [2] https://patchwork.kernel.org/cover/10719445/ Martin Blumenstingl (5): dt-bindings: gpu: mali-utgard: add Amlogic Meson8 and Meson8b compatible clk: meson: meson8b: use a separate clock table for Meson8 clk: meson: meson8b: add the GPU clock tree ARM: dts: meson8: add the Mali-450 MP6 GPU ARM: dts: meson8b: add the Mali-450 MP2 GPU .../bindings/gpu/arm,mali-utgard.txt | 6 + arch/arm/boot/dts/meson8.dtsi | 58 +++ arch/arm/boot/dts/meson8b.dtsi | 46 +++ drivers/clk/meson/meson8b.c | 349 +++++++++++++++++- drivers/clk/meson/meson8b.h | 9 +- 5 files changed, 461 insertions(+), 7 deletions(-) -- 2.19.2
