Re: [PATCH 00/15] drm/msm: Support for Hawi & Maili GPU

[Akhil P Oommen]

On 9/24/2026 7:36 PM, Connor Abbott wrote:
> On Thu, Sep 24, 2026 at 9:41 AM Akhil P Oommen <akhilpo@xxxxxxxxxxxxxxxx> wrote:
>>
>>
>>
>> On 9/24/2026 12:54 AM, Connor Abbott wrote:
>>> On Wed, Sep 23, 2026 at 6:26 AM Akhil P Oommen <akhilpo@xxxxxxxxxxxxxxxx> wrote:
>>>>
>>>> Adreno 850 is the next generation of A8x GPU present in Hawi SoC. It shares
>>>> the ADRENO_8XX_GEN2 family and slice architecture with A840, but has many
>>>> architectural improvements. There is a new block Matrix core (MALU) which
>>>> helps to accelerate certain compute workloads. Also, there is a new Bx rail
>>>> that powes a part of the GPU IP. GMU is now powered by a dedicated GDSC
>>>> powered by MxG rail.
>>>
>>> If there is a dedicated rail for GMU, then
>>> VK_KHR_calibrated_timestamps is likely broken, assuming that the GMU
>>> AO counter is on this rail. The AO offset logic in kgsl probably needs
>>> to be ported here. Has this been tested?
>>
>> Not sure how GMU core's power domain affect the AO timer. Could you please point
>> me to the AO offset related change in KGSL? I will check.
> 
> Previously the GMU AO counter was part of CX, which is kept on by
> other things in the system, so it continues to tick even if the GPU is
> suspended. However kgsl does not rely on that, and recalibrates the
> GMU AO timer whenever booting the GMU [1], which we currently don't

KGSL doesn't do that during every resume. KGSL recalibrates it only after a
system suspend. The AO counter is still in CX MISC which is under CX domain.
So it should not be affected in Hawi.

-Akhil.

> do. I don't know if the timer is still part of CX, but if not, then
> this part of kgsl could become load-bearing in a way it wasn't before.
> It seems possible that it isn't part of CX anymore, given your
> description that GMU and other things have been moved to new
> GPU-specific power domains.
> 
> Connor
> 
> [1] https://git.codelinaro.org/clo/la/platform/vendor/qcom/opensource/graphics-kernel/-/blob/gfx-kernel.lnx.16.0.r14-rel/adreno_gen8.c?ref_type=heads#L917

> 
>>
>> -Akhil.
>>>
>>> Connor
>>>
>>>>
>>>> Maili GPU (Adreno 845) is very similar to A850, except that it doesn't
>>>> have the MALU block.
>>>>
>>>> We will post the Mesa support and linux-firmware support soon. MALU support
>>>> will be brought in separately along with its support in Mesa.
>>>>
>>>> As there is no display support available for Hawi/Maili, validated offscreen
>>>> testcases that render basic triangles, glmark2-offscreen etc.
>>>>
>>>> The driver/dt-binding patches are for Rob to pickup and the DT patches
>>>> are for Bjorn.
>>>>
>>>> Signed-off-by: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxxxx>
>>>> ---
>>>> To: Rob Clark <robin.clark@xxxxxxxxxxxxxxxx>
>>>> To: Sean Paul <sean@xxxxxxxxxx>
>>>> To: Konrad Dybcio <konradybcio@xxxxxxxxxx>
>>>> To: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxxxx>
>>>> To: Dmitry Baryshkov <lumag@xxxxxxxxxx>
>>>> To: Abhinav Kumar <abhinav.kumar@xxxxxxxxx>
>>>> To: Jessica Zhang <jesszhan0024@xxxxxxxxx>
>>>> To: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx>
>>>> To: David Airlie <airlied@xxxxxxxxx>
>>>> To: Simona Vetter <simona@xxxxxxxx>
>>>> To: Jordan Crouse <jordan@xxxxxxxxxxxxxxxxx>
>>>> To: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
>>>> To: Maxime Ripard <mripard@xxxxxxxxxx>
>>>> To: Thomas Zimmermann <tzimmermann@xxxxxxx>
>>>> To: Rob Herring <robh@xxxxxxxxxx>
>>>> To: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>
>>>> To: Conor Dooley <conor+dt@xxxxxxxxxx>
>>>> To: Bjorn Andersson <andersson@xxxxxxxxxx>
>>>> Cc: linux-arm-msm@xxxxxxxxxxxxxxx
>>>> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
>>>> Cc: freedreno@xxxxxxxxxxxxxxxxxxxxx
>>>> Cc: linux-kernel@xxxxxxxxxxxxxxx
>>>> Cc: devicetree@xxxxxxxxxxxxxxx
>>>>
>>>> ---
>>>> Akhil P Oommen (11):
>>>>       drm/msm/a6xx: Honor perfmode_bw threshold on A8x
>>>>       drm/msm/a6xx: Fix secondary rail vote in ARC votes
>>>>       drm/msm/a6xx: Fix RPMH dependency votes
>>>>       drm/msm/a6xx: Factor out RPMh arc-vote helpers
>>>>       drm/msm/a6xx: Add BX rail support to GMU dependency votes
>>>>       drm/msm/a6xx: Clamp MX dependency vote
>>>>       drm/msm/a8xx: Add Adreno 850 support
>>>>       drm/msm/a6xx: Send THINMEM config to GMU for A850
>>>>       dt-bindings: display/msm: Document A850 GPU and GMU
>>>>       arm64: dts: qcom: hawi: Add GPU support
>>>>       arm64: dts: qcom: hawi-mtp: Enable GPU
>>>>
>>>> Bhaskar Reddy Valluru (4):
>>>>       drm/msm/a8xx: Add Adreno 845 support
>>>>       dt-bindings: display/msm: Document A845 GPU and GMU
>>>>       arm64: dts: qcom: maili: Add GPU support
>>>>       arm64: dts: qcom: maili-mtp: Enable GPU
>>>>
>>>>  .../devicetree/bindings/display/msm/gmu.yaml       |  90 ++++-
>>>>  .../devicetree/bindings/display/msm/gpu.yaml       |   4 +
>>>>  arch/arm64/boot/dts/qcom/hawi-mtp.dts              |   8 +
>>>>  arch/arm64/boot/dts/qcom/hawi.dtsi                 | 336 ++++++++++++++++
>>>>  arch/arm64/boot/dts/qcom/maili-mtp.dts             |   8 +
>>>>  arch/arm64/boot/dts/qcom/maili.dtsi                | 309 ++++++++++++++
>>>>  drivers/gpu/drm/msm/adreno/a6xx_catalog.c          | 446 +++++++++++++++++++++
>>>>  drivers/gpu/drm/msm/adreno/a6xx_gmu.c              | 231 +++++++----
>>>>  drivers/gpu/drm/msm/adreno/a6xx_gmu.h              |   1 +
>>>>  drivers/gpu/drm/msm/adreno/a6xx_gpu.h              |   2 +
>>>>  drivers/gpu/drm/msm/adreno/a6xx_hfi.c              |  25 ++
>>>>  drivers/gpu/drm/msm/adreno/a6xx_hfi.h              |   1 +
>>>>  drivers/gpu/drm/msm/adreno/a8xx_gpu.c              |  16 +-
>>>>  drivers/gpu/drm/msm/adreno/adreno_gpu.h            |  21 +
>>>>  drivers/gpu/drm/msm/registers/adreno/a6xx.xml      |   8 +
>>>>  15 files changed, 1407 insertions(+), 99 deletions(-)
>>>> ---
>>>> base-commit: 1e9b8055458b92f9ebab6f39d97ade5265a0b012
>>>> change-id: 20260811-hawi-gpu-05b4ecfc3c4c
>>>> prerequisite-message-id: 20260923-hawi-dt-post-v1-0-e41473b6298b@xxxxxxxxxxxxxxxx
>>>> prerequisite-patch-id: 239c169e15da44519b2dad09ecd92f0052757929
>>>> prerequisite-patch-id: 6c586be864944bb1eed773e8c211b898bb1289fe
>>>> prerequisite-patch-id: f3d8748ccdb6760563f3e07f701a18388a9408ed
>>>> prerequisite-patch-id: b1639353868bed10fd3cbfcd01cfb88b7e737ead
>>>> prerequisite-message-id: 20260922-maili-dts-v1-0-ac2b1b76bfd9@xxxxxxxxxxxxxxxx
>>>> prerequisite-patch-id: 36f12c16bf9cb0411d8be2f396407c724162189d
>>>> prerequisite-patch-id: 28ede1ab83d4b5b56423ebb09bae74b6599b3bac
>>>> prerequisite-patch-id: 6b3e28c55c07bfcdca8bfa9219fa0c6c763c6f6e
>>>> prerequisite-patch-id: a2007fdaaeaf2981860c54ae5514f5a6f06c6bb3
>>>> prerequisite-patch-id: af8aa3c630647336bdaeffa9c88de3650f1e49e4
>>>>
>>>> Best regards,
>>>> --
>>>> Akhil P Oommen <akhilpo@xxxxxxxxxxxxxxxx>
>>>>
>>