To debug display mmu faults, this series introduces a display fault
handler similar to the gpu one.
This series has been tested on sc7280 chromebook by using triggering
a smmu fault by forcing an incorrect stride on the planes.
changes since RFC:
- move msm_mmu_set_fault_handler() to msm_kms_init_aspace
- make msm_kms_fault_handler return -ENOSYS
- use msm_disp_snapshot_state() instead of
msm_disp_snapshot_state_sync()
because smmu fault handler should not sleep
- add a rate limiter for the snapshot to avoid spam
Abhinav Kumar (5):
drm/msm: register a fault handler for display mmu faults
drm/msm/iommu: rename msm_fault_handler to msm_gpu_fault_handler
drm/msm/iommu: introduce msm_iommu_disp_new() for msm_kms
drm/msm: switch msm_kms to use msm_iommu_disp_new()
drm/msm/dpu: rate limit snapshot capture for mmu faults
drivers/gpu/drm/msm/msm_iommu.c | 32 +++++++++++++++++++++++++++++---
drivers/gpu/drm/msm/msm_kms.c | 19 ++++++++++++++++++-
drivers/gpu/drm/msm/msm_kms.h | 3 +++
drivers/gpu/drm/msm/msm_mmu.h | 1 +
4 files changed, 51 insertions(+), 4 deletions(-)
--
2.44.0
