[PATCH v4 00/10] drm/msm: rework the ties between KMS and GPU parts of the driver
Dmitry Baryshkov
dmitry.baryshkov at oss.qualcomm.com
Sat Jul 5 10:02:25 UTC 2025
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 at oss.qualcomm.com>
---
Changes in v4:
- Rebased on msm-next(-robclark)
- Temporarily dropped the "no-GPU" patch, it will be reposted later
(Rob)
- Link to v3: https://lore.kernel.org/r/20250518-msm-gpu-split-v3-0-0e91e8e77023@oss.qualcomm.com
Changes in v3:
- Disabled SYNCOBJ / SYNCOBJ_TIMELINE for KMS-only driver (Rob Clark)
- Further refine Kconfig dependencies
- Link to v2: https://lore.kernel.org/r/20250503-msm-gpu-split-v2-0-1292cba0f5ad@oss.qualcomm.com
Changes in v2:
- Got rid of mdp4_crtc.id and msm_drm_private.num_crtcs
- Moved msm_drm_private.wq and msm_drm_private.event_thread to struct
msm_kms (Rob Clark)
- Moved HDMI / DSI / DP pointers to msm_kms (Abhinav)
- Link to v1: https://lore.kernel.org/r/20250413-msm-gpu-split-v1-0-1132f4b616c7@oss.qualcomm.com
---
Dmitry Baryshkov (10):
drm/msm: move wq handling to KMS code
drm/msm: move helper calls to msm_kms.c
drm/msm/mdp4: get rid of mdp4_crtc.id
drm/msm: get rid of msm_drm_private::num_crtcs
drm/msm: move KMS driver data to msm_kms
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 | 19 +--
drivers/gpu/drm/msm/adreno/adreno_device.c | 39 ++---
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 4 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 13 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 35 +++--
drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c | 9 +-
drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 13 +-
drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.h | 2 +-
drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c | 2 +-
drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 17 ++-
drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c | 12 +-
drivers/gpu/drm/msm/dp/dp_debug.c | 4 +
drivers/gpu/drm/msm/dp/dp_display.c | 6 +-
drivers/gpu/drm/msm/dsi/dsi.c | 4 +-
drivers/gpu/drm/msm/hdmi/hdmi.c | 9 +-
drivers/gpu/drm/msm/msm_debugfs.c | 97 ++++++++-----
drivers/gpu/drm/msm/msm_drv.c | 166 ++++++++++++++--------
drivers/gpu/drm/msm/msm_drv.h | 31 ++--
drivers/gpu/drm/msm/msm_kms.c | 41 +++++-
drivers/gpu/drm/msm/msm_kms.h | 46 ++++++
21 files changed, 360 insertions(+), 243 deletions(-)
---
base-commit: 7df7b18268eb5c75e3978da5d183d8cc24d4e201
change-id: 20250411-msm-gpu-split-2701e49e40f0
Best regards,
--
With best wishes
Dmitry
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