After switching to drm_gpuvm, the IOMMU becomes a requirement even for
KMS-only devices (e.g. allocating a buffer for DSI commands now also
requires the IOMMU / GPUVM). Disallow non-IOMMU configurations.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
Changes in v2:
- Corrected error messages (Konrad)
- Changed msm_kms_init_vm() to take mdss_dev an argument (Rob)
- Made msm_iommu_new() / msm_iommu_disp_new() / msm_iommu_gpu_new() fail
instead of returning NULL if there is no IOMMU
- Link to v1: https://lore.kernel.org/r/20250706-msm-no-iommu-v1-0-9e8274b30c33@oss.qualcomm.com
---
Dmitry Baryshkov (4):
drm/msm/mdp4: stop supporting no-IOMMU configuration
drm/msm: stop supporting no-IOMMU configuration
drm/msm: don't return NULL from msm_iommu_new()
drm/msm/mdp4: use msm_kms_init_vm() instead of duplicating it
drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 2 --
drivers/gpu/drm/msm/adreno/adreno_gpu.c | 4 +---
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 2 +-
drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 27 +++++----------------------
drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 2 +-
drivers/gpu/drm/msm/msm_drv.h | 2 +-
drivers/gpu/drm/msm/msm_iommu.c | 6 +++---
drivers/gpu/drm/msm/msm_kms.c | 14 ++++++--------
8 files changed, 18 insertions(+), 41 deletions(-)
---
base-commit: 3cf6147f2b51a569761e1ef010efbd891e3a3a15
change-id: 20250706-msm-no-iommu-c15212a0e7ac
Best regards,
--
With best wishes
Dmitry