[PATCH v3 0/6] Support for Adreno 612 GPU - Respin

[Akhil P Oommen <akhilpo@oss.qualcomm.com>]

This is a respin of an old series [1] that aimed to add support for
Adreno 612 GPU found in SM6150/QCS615 chipsets. In this version, we
have consolidated the previously separate series for DT and driver
support, along with some significant rework.

Regarding A612 GPU, it falls under ADRENO_6XX_GEN1 family and is a cut
down version of A615 GPU. A612 has a new IP called Reduced Graphics
Management Unit or RGMU, a small state machine which helps to toggle
GX GDSC (connected to CX rail) to implement the IFPC feature. Unlike a
full-fledged GMU, the RGMU does not support features such as clock
control, resource voting via RPMh, HFI etc. Therefore, we require linux
clock driver support similar to gmu-wrapper implementations to control
gpu core clock and GX GDSC.

In this series, the description of RGMU hardware in devicetree is more
complete than in previous version. However, the RGMU core is not
initialized from the driver as there is currently no need for it. We do
perform a dummy load of RGMU firmware (now available in linux-firmware)
to ensure that enabling RGMU core in the future won't break backward
compatibility for users.

Due to significant changes compared to the old series, all R-b tags have
been dropped. Please review with fresh eyes.

Last 3 patches are for Bjorn and the rest are for Rob Clark for pick up.

[1] Driver: https://lore.kernel.org/lkml/20241213-a612-gpu-support-v3-1-0e9b25570a69@quicinc.com/
    Devicetree: https://lore.kernel.org/lkml/fu4rayftf3i4arf6l6bzqyzsctomglhpiniljkeuj74ftvzlpo@vklca2giwjlw/

Signed-off-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
---
Changes in v3:
- Rebased on top of next-20251121 tag
- Drop a612 driver support patch as it got picked up
- Rename rgmu.yaml -> qcom,adreno-rgmu.yaml (Krzysztof)
- Remove reg-names property for rgmu node (Krzysztof)
- Use 'gmu' instead of 'rgmu' as node name (Krzysztof)
- Describe cx_mem and cx_dgc register ranges (Krzysztof)
- A new patch to retrieve gmu core reg resource by id
- Link to v2: https://lore.kernel.org/r/20251107-qcs615-spin-2-v2-0-a2d7c4fbf6e6@oss.qualcomm.com

Changes in v2:
- Rebased on next-20251105
- Fix hwcg configuration (Dan)
- Reuse a few gmu-wrapper routines (Konrad)
- Split out rgmu dt schema (Krzysztof/Dmitry)
- Fixes for GPU dt binding doc (Krzysztof)
- Removed VDD_CX from rgmu dt node. Will post a separate series to
address the gpucc changes (Konrad)
- Fix the reg range size for adreno smmu node and reorder the properties (Konrad)
- Link to v1: https://lore.kernel.org/r/20251017-qcs615-spin-2-v1-0-0baa44f80905@oss.qualcomm.com

---
Akhil P Oommen (2):
      drm/msm/a6xx: Retrieve gmu core range by index
      dt-bindings: display/msm: gpu: Document A612 GPU

Jie Zhang (3):
      dt-bindings: display/msm/rgmu: Document A612 RGMU
      arm64: dts: qcom: sm6150: Add gpu and rgmu nodes
      arm64: dts: qcom: qcs615-ride: Enable Adreno 612 GPU

Qingqing Zhou (1):
      arm64: dts: qcom: sm6150: add the GPU SMMU node

 .../devicetree/bindings/display/msm/gpu.yaml       |  24 +++-
 .../bindings/display/msm/qcom,adreno-rgmu.yaml     | 126 ++++++++++++++++++
 MAINTAINERS                                        |   1 +
 arch/arm64/boot/dts/qcom/qcs615-ride.dts           |   8 ++
 arch/arm64/boot/dts/qcom/talos.dtsi                | 141 +++++++++++++++++++++
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c              |  14 +-
 6 files changed, 304 insertions(+), 10 deletions(-)
---
base-commit: e93f8002e4d244f0642224635f457bc8b135c98b
change-id: 20251015-qcs615-spin-2-ed45b0deb998

Best regards,
-- 
Akhil P Oommen <akhilpo@oss.qualcomm.com>