linux-kernel - Re: [PATCH RFC RFT] drm/msm: adreno: attach the GMU device to a driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <3149158c-a6c4-4c5d-9011-de4db8d1220c@oss.qualcomm.com>
Date: Wed, 14 Jan 2026 12:07:20 +0530
From: Akhil P Oommen <akhilpo@....qualcomm.com>
To: Neil Armstrong <neil.armstrong@...aro.org>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Rob Clark <robin.clark@....qualcomm.com>, Sean Paul <sean@...rly.run>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>
Subject: Re: [PATCH RFC RFT] drm/msm: adreno: attach the GMU device to a
 driver

On 10/22/2025 6:14 PM, Neil Armstrong wrote:
> Due to the sync_state is enabled by default in pmdomain & CCF since v6.17,
> the GCC and GPUCC sync_state would stay pending, leaving the resources in
> full performance:
> gcc-x1e80100 100000.clock-controller: sync_state() pending due to 3d6a000.gmu
> gpucc-x1e80100 3d90000.clock-controller: sync_state() pending due to 3d6a000.gmu
> 
> In order to fix this state and allow the GMU to be properly
> probed, let's add a proper driver for the GMU and add it to
> the MSM driver components.
> 
> Only the proper GMU has been tested since I don't have
> access to hardware with a GMU wrapper.
> 
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gmu.c      | 354 ++++++++++++++---------------
>  drivers/gpu/drm/msm/adreno/a6xx_gpu.c      |   6 -
>  drivers/gpu/drm/msm/adreno/a6xx_gpu.h      |   3 -
>  drivers/gpu/drm/msm/adreno/adreno_device.c |   4 +
>  drivers/gpu/drm/msm/adreno/adreno_gpu.h    |   4 +
>  drivers/gpu/drm/msm/msm_drv.c              |  16 +-
>  6 files changed, 192 insertions(+), 195 deletions(-)
> 

Niel,

Could you please send the follow up revision of this patch? Lets get
this fix merged.

-Akhil.