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.barysh...@oss.qualcomm.com> --- Changes in v5: - Rebased on msm-next, dropped applied patches, re-picked up no-GPU patch - Rewored debugfs, GEM VM_BIND and ioctls code to reduce number of #ifdef's - Link to v4: https://lore.kernel.org/r/20250705-msm-gpu-split-v4-0-fb470c481...@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-v3-0-0e91e8e77...@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-v2-0-1292cba0f...@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-v1-0-1132f4b61...@oss.qualcomm.com --- Dmitry Baryshkov (5): drm/msm: correct separate_gpu_kms description drm/msm: split VM_BIND from the rest of GEM VMA code drm/msm: split away IOCTLs implementation drm/msm: split debugfs implementation drm/msm: make it possible to disable GPU support drivers/gpu/drm/msm/Kconfig | 27 +- drivers/gpu/drm/msm/Makefile | 21 +- drivers/gpu/drm/msm/msm_debugfs.c | 420 ------------ drivers/gpu/drm/msm/msm_debugfs.h | 14 - drivers/gpu/drm/msm/msm_drv.c | 645 +++--------------- drivers/gpu/drm/msm/msm_drv.h | 16 - drivers/gpu/drm/msm/msm_gem.h | 10 + drivers/gpu/drm/msm/msm_gem_debugfs.c | 96 +++ drivers/gpu/drm/msm/msm_gem_vm_bind.c | 1116 +++++++++++++++++++++++++++++++ drivers/gpu/drm/msm/msm_gem_vma.c | 1177 +-------------------------------- drivers/gpu/drm/msm/msm_gem_vma.h | 119 ++++ drivers/gpu/drm/msm/msm_gpu.c | 45 ++ drivers/gpu/drm/msm/msm_gpu.h | 111 +++- drivers/gpu/drm/msm/msm_gpu_debugfs.c | 213 ++++++ drivers/gpu/drm/msm/msm_ioctl.c | 484 ++++++++++++++ drivers/gpu/drm/msm/msm_ioctl.h | 37 ++ drivers/gpu/drm/msm/msm_kms.h | 8 + drivers/gpu/drm/msm/msm_kms_debugfs.c | 129 ++++ drivers/gpu/drm/msm/msm_submitqueue.c | 12 +- 19 files changed, 2463 insertions(+), 2237 deletions(-) --- base-commit: 05af764719214d6568adb55c8749dec295228da8 change-id: 20250411-msm-gpu-split-2701e49e40f0 Best regards, -- With best wishes Dmitry
