Messages in this thread | | | From | AngeloGioacchino Del Regno <> | Subject | [PATCH 0/4] drm/panfrost: Turn off clocks and regulators in PM | Date | Mon, 30 Oct 2023 14:22:53 +0100 |
| |
At least MediaTek platforms are able to get the GPU clocks and regulators completely off during system suspend, allowing to save a bit of power.
Panfrost is used on more than just MediaTek SoCs and the benefits of this can be variable across different SoC models and/or different SoCs from different manufacturers: this means that just adding this ability for all could result in unexpected issues and breakages on untested SoCs.
For the aforemenetioned reasons, turning off the clocks and/or regulators was implemented inside of a capabilities barrier that shall be enabled on a per-SoC basis (in the panfrost_compatible platform data) after testing of both benefits and feasibility.
In this series, I am adding the ability to switch on/off clocks and regulators and enabling that on all MediaTek platforms, as I was able to successfully test that on multiple Chromebooks featuring different MediaTek SoCs; specifically, I've manually tested on MT8186, MT8192 and MT8195, while MT8183 got tested only by KernelCI.
Cheers!
AngeloGioacchino Del Regno (4): drm/panfrost: Implement ability to turn on/off GPU clocks in suspend drm/panfrost: Set clocks on/off during system sleep on MediaTek SoCs drm/panfrost: Implement ability to turn on/off regulators in suspend drm/panfrost: Set regulators on/off during system sleep on MediaTek SoCs
drivers/gpu/drm/panfrost/panfrost_device.c | 78 ++++++++++++++++++++-- drivers/gpu/drm/panfrost/panfrost_device.h | 13 ++++ drivers/gpu/drm/panfrost/panfrost_drv.c | 3 + 3 files changed, 90 insertions(+), 4 deletions(-)
-- 2.42.0
| |