Messages in this thread | | | From | Martin Blumenstingl <> | Subject | [PATCH v2 0/3] GPU DVFS for Meson GXBB/GXL/GXM/G12A/G12B/SM1 | Date | Sun, 19 Jul 2020 19:32:10 +0200 |
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Now that we have GPU DVFS support in lima [0] (in Linux 5.7) and panfrost we can make it work on Amlogic SoCs.
I decided to remove code duplication for the Mali-450 GPU on GXBB and GXL so it will be easier to maintain this. This refactoring is part of patch #1. Patches #2 (GXM) and #3 (G12A, G12B, SM1) are straight forward; it replaces the hardcoded clock settings with the the GPU OPP table.
I used the userspace devfreq governor to cycle through all available GPU frequency settings on GXL, GXM and G12A (which covers all relevant GPU driver and clock driver combinations). I have taken the GPU OPP tables from Amlogic's 4.9 vendor kernel and the voltage settings (opp-microvolt property) from the public dataseheets for all SoCs.
Changes since v1 at [1]: - removed the clock patches from this series as they are already applied (in Linux 5.8) - rebased on top of Neil's recent patch "arm64: dts: meson-gxl-s805x: reduce initial Mali450 core frequency" - adapted patch #1 after Neil's GXL S805X patch to keep the 744MHz OPP disabled on that package - added a comment about GP0_PLL (as to why it's needed) to all patch descriptions - removed RFC prefix
[0] https://cgit.freedesktop.org/drm-misc/commit/?id=1996970773a323533e1cc1b6b97f00a95d675f32 [1] https://patchwork.kernel.org/cover/11466399/
Martin Blumenstingl (3): arm64: dts: amlogic: meson-gx: add the Mali-450 OPP table and use DVFS arm64: dts: amlogic: meson-gxm: add the Mali OPP table and use DVFS arm64: dts: amlogic: meson-g12: add the Mali OPP table and use DVFS
.../boot/dts/amlogic/meson-g12-common.dtsi | 49 ++++++++++----- .../boot/dts/amlogic/meson-gx-mali450.dtsi | 61 +++++++++++++++++++ arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 51 ++++------------ .../boot/dts/amlogic/meson-gxl-mali.dtsi | 46 +++----------- .../boot/dts/amlogic/meson-gxl-s805x.dtsi | 17 +++--- arch/arm64/boot/dts/amlogic/meson-gxm.dtsi | 45 +++++++++----- 6 files changed, 153 insertions(+), 116 deletions(-) create mode 100644 arch/arm64/boot/dts/amlogic/meson-gx-mali450.dtsi
-- 2.27.0
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