On Wed, Feb 8, 2023 at 6:37 PM AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx> wrote: > > This series adds support for new MediaTek SoCs (MT8186/MT8192/MT8195) > and improves MT8183 support: since the mtk-regulator-coupler driver > was picked, it is now useless for Panfrost to look for, and manage, > two regulators (GPU Vcore and GPU SRAM) on MediaTek; > > The aforementioned driver will take care of keeping the voltage > relation (/constraints) of the two regulators on its own when a > voltage change request is sent to the Vcore, solving the old time > issue with not working DVFS on Panfrost+MediaTek (due to devfreq > supporting only single regulator). > > In the specific case of MT8183, in order to not break the ABI, it > was necessary to add a new compatible for enabling DVFS. Tested on MT8183 Juniper (Kukui-based device), MT8192 Hayato (Asurada-based), and MT8195 Tomato (Cherry-based). GPU probed. When running glmark-es2-drm, observed state transitions in /sys/class/devfreq/13040000.gpu/trans_stat , as well as actual changes to values for regulators and clocks. Tested-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx> Also observed that sometimes when glmark terminated, the GPU would not be brought down to the lowest OPP.
