linux-kernel - [PATCH 0/7] drm/msm: rework the ties between KMS and GPU parts of the driver

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Message-Id: <20250413-msm-gpu-split-v1-0-1132f4b616c7@oss.qualcomm.com>
Date: Sun, 13 Apr 2025 19:32:54 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Rob Clark <robdclark@...il.com>, Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <lumag@...nel.org>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/7] drm/msm: rework the ties between KMS and GPU parts of
 the driver

Currently the KMS and GPU parts of the msm driver are pretty much
intertwined. It is impossible to register a KMS-only device and
registering a GPU-only DRM device requires modifying the DT.  Not to
mention that binding the GPU-only device creates an interim platform
devices, which complicates IOMMU setup.

Rework the driver:
- Make it possible to disable KMS parts (if MDP4, MDP5 and DPU drivers
  are disabled).
- Register GPU-only devices without an interim platform device.
- Add module param that makes msm driver register GPU and KMS devices
  separately.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
---
Dmitry Baryshkov (7):
      drm/msm: move wq handling to KMS code
      drm/msm: move helper calls to msm_kms.c
      drm/msm: make it possible to disable KMS-related code.
      drm/msm: bail out late_init_minor() if it is not a GPU device
      drm/msm: rearrange symbol selection
      drm/msm: rework binding of Imageon GPUs
      drm/msm: enable separate binding of GPU and display devices

 drivers/gpu/drm/msm/Kconfig                |  34 ++++--
 drivers/gpu/drm/msm/Makefile               |  16 +--
 drivers/gpu/drm/msm/adreno/adreno_device.c |  39 ++-----
 drivers/gpu/drm/msm/dp/dp_debug.c          |   4 +
 drivers/gpu/drm/msm/msm_debugfs.c          |  97 ++++++++++-------
 drivers/gpu/drm/msm/msm_drv.c              | 168 +++++++++++++++++++----------
 drivers/gpu/drm/msm/msm_drv.h              |  13 ++-
 drivers/gpu/drm/msm/msm_kms.c              |  36 ++++++-
 drivers/gpu/drm/msm/msm_kms.h              |  25 +++++
 9 files changed, 285 insertions(+), 147 deletions(-)
---
base-commit: a4e1d05abd6847ba11edf46734efecec86a1fe2c
change-id: 20250411-msm-gpu-split-2701e49e40f0

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>