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dt-bindings: opp: Add v2-qcom-adreno vendor bindings

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Add a new schema which extends opp-v2 to support a new vendor specific
property required for Adreno GPUs found in Qualcomm's SoCs. The new
property called "qcom,opp-acd-level" carries a u32 value recommended
for each opp needs to be shared to GMU during runtime.

Also, update MAINTAINERS file include the new opp-v2-qcom-adreno.yaml.

Cc: Rob Clark <robdclark@gmail.com>
Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Tested-by: Maya Matuszczyk <maccraft123mc@gmail.com>
Tested-by: Anthony Ruhier <aruhier@mailbox.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/649351/
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Akhil P Oommen 2025-04-19 20:21:34 +05:30 committed by Rob Clark
parent 19c17841e3
commit db76003ade
2 changed files with 97 additions and 0 deletions
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96
Documentation/devicetree/bindings/opp/opp-v2-qcom-adreno.yaml Normal file
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@ -0,0 +1,96 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/opp/opp-v2-qcom-adreno.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Qualcomm Adreno compatible OPP supply
description:
Adreno GPUs present in Qualcomm's Snapdragon chipsets uses an OPP specific
ACD related information tailored for the specific chipset. This binding
provides the information needed to describe such a hardware value.
maintainers:
- Rob Clark <robdclark@gmail.com>
allOf:
- $ref: opp-v2-base.yaml#
properties:
compatible:
contains:
const: operating-points-v2-adreno
patternProperties:
'^opp-[0-9]+$':
type: object
additionalProperties: false
properties:
opp-hz: true
opp-level: true
opp-peak-kBps: true
opp-supported-hw: true
qcom,opp-acd-level:
description: |
A positive value representing the ACD (Adaptive Clock Distribution,
a fancy name for clk throttling during voltage droop) level associated
with this OPP node. This value is shared to a co-processor inside GPU
(called Graphics Management Unit a.k.a GMU) during wake up. It may not
be present for some OPPs and GMU will disable ACD while transitioning
to that OPP. This value encodes a voltage threshold, delay cycles &
calibration margins which are identified by characterization of the
SoC. So, it doesn't have any unit. This data is passed to GMU firmware
via 'HFI_H2F_MSG_ACD' packet.
$ref: /schemas/types.yaml#/definitions/uint32
required:
- opp-hz
- opp-level
required:
- compatible
additionalProperties: false
examples:
- |
#include <dt-bindings/power/qcom-rpmpd.h>
gpu_opp_table: opp-table {
compatible = "operating-points-v2-adreno", "operating-points-v2";
opp-687000000 {
opp-hz = /bits/ 64 <687000000>;
opp-level = <RPMH_REGULATOR_LEVEL_SVS_L1>;
opp-peak-kBps = <8171875>;
qcom,opp-acd-level = <0x882e5ffd>;
};
opp-550000000 {
opp-hz = /bits/ 64 <550000000>;
opp-level = <RPMH_REGULATOR_LEVEL_SVS>;
opp-peak-kBps = <6074219>;
qcom,opp-acd-level = <0xc0285ffd>;
};
opp-390000000 {
opp-hz = /bits/ 64 <390000000>;
opp-level = <RPMH_REGULATOR_LEVEL_LOW_SVS>;
opp-peak-kBps = <3000000>;
qcom,opp-acd-level = <0xc0285ffd>;
};
opp-300000000 {
opp-hz = /bits/ 64 <300000000>;
opp-level = <RPMH_REGULATOR_LEVEL_LOW_SVS_D1>;
opp-peak-kBps = <2136719>;
/* Intentionally left out qcom,opp-acd-level property here */
};
};

1
MAINTAINERS
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@ -7512,6 +7512,7 @@ S: Maintained
B: https://gitlab.freedesktop.org/drm/msm/-/issues
T: git https://gitlab.freedesktop.org/drm/msm.git
F: Documentation/devicetree/bindings/display/msm/gpu.yaml
F: Documentation/devicetree/bindings/opp/opp-v2-qcom-adreno.yaml
F: drivers/gpu/drm/msm/adreno/
F: drivers/gpu/drm/msm/msm_gpu.*
F: drivers/gpu/drm/msm/msm_gpu_devfreq.*