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.barysh...@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-v1-0-9e8274b30...@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
