This series adds support for ACD feature for Adreno GPU which helps to lower the power consumption on GX rail and also sometimes is a requirement to enable higher GPU frequencies. At high level, following are the sequences required for ACD feature: 1. Identify the ACD level data for each regulator corner 2. Send a message to AOSS to switch voltage plan 3. Send a table with ACD level information to GMU during every gpu wake up For (1), it is better to keep ACD level data in devicetree because this value depends on the process node, voltage margins etc which are chipset specific. For instance, same GPU HW IP on a different chipset would have a different set of values. So, a new schema which extends opp-v2 is created to add a new property called "qcom,opp-acd-level". ACD support is dynamically detected based on the presence of "qcom,opp-acd-level" property in GPU's opp table. Also, qmp node should be present under GMU node in devicetree for communication with AOSS. The devicetree patch in this series adds the acd-level data for X1-85 GPU present in Snapdragon X1 Elite chipset. This series is rebased on top of drm-msm/msm-next. --- Changes in v2: - Removed RFC tag for the series - Improve documentation for the new dt bindings (Krzysztof) - Add fallback compatible string for opp-table (Krzysztof) - Link to v1: https://lore.kernel.org/r/20241012-gpu-acd-v1-0-1e5e91aa95b6@xxxxxxxxxxx --- Akhil P Oommen (3): drm/msm/adreno: Add support for ACD dt-bindings: opp: Add v2-qcom-adreno vendor bindings arm64: dts: qcom: x1e80100: Add ACD levels for GPU .../bindings/opp/opp-v2-qcom-adreno.yaml | 96 ++++++++++++++++++++++ arch/arm64/boot/dts/qcom/x1e80100.dtsi | 11 ++- drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 81 ++++++++++++++---- drivers/gpu/drm/msm/adreno/a6xx_gmu.h | 1 + drivers/gpu/drm/msm/adreno/a6xx_hfi.c | 36 ++++++++ drivers/gpu/drm/msm/adreno/a6xx_hfi.h | 21 +++++ 6 files changed, 230 insertions(+), 16 deletions(-) --- base-commit: a20a91fb1bfac5d05ec5bcf9afe0c9363f6c8c93 change-id: 20240724-gpu-acd-6c1dc5dcf516 Best regards, -- Akhil P Oommen <quic_akhilpo@xxxxxxxxxxx>
