| Message ID | 20240628214848.4075651-2-quic_abhinavk@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | [1/5] drm/msm: register a fault handler for display mmu faults | expand |
On Fri, Jun 28, 2024 at 02:48:43PM GMT, Abhinav Kumar wrote: > In preparation to register a iommu fault handler for display > related modules, register a fault handler for the backing > mmu object of msm_kms. > > Currently, the fault handler only captures the display snapshot > but we can expand this later if more information needs to be > added to debug display mmu faults. > > Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com> > --- > drivers/gpu/drm/msm/msm_kms.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
diff --git a/drivers/gpu/drm/msm/msm_kms.c b/drivers/gpu/drm/msm/msm_kms.c index af6a6fcb1173..2d7c5a5e22e0 100644 --- a/drivers/gpu/drm/msm/msm_kms.c +++ b/drivers/gpu/drm/msm/msm_kms.c @@ -164,12 +164,23 @@ void msm_crtc_disable_vblank(struct drm_crtc *crtc) vblank_ctrl_queue_work(priv, crtc, false); } +static int msm_kms_fault_handler(void *arg, unsigned long iova, int flags, void *data) +{ + struct msm_kms *kms = arg; + + msm_disp_snapshot_state(kms->dev); + + return -ENOSYS; +} + struct msm_gem_address_space *msm_kms_init_aspace(struct drm_device *dev) { struct msm_gem_address_space *aspace; struct msm_mmu *mmu; struct device *mdp_dev = dev->dev; struct device *mdss_dev = mdp_dev->parent; + struct msm_drm_private *priv = dev->dev_private; + struct msm_kms *kms = priv->kms; struct device *iommu_dev; /* @@ -197,6 +208,8 @@ struct msm_gem_address_space *msm_kms_init_aspace(struct drm_device *dev) mmu->funcs->destroy(mmu); } + msm_mmu_set_fault_handler(aspace->mmu, kms, msm_kms_fault_handler); + return aspace; }
In preparation to register a iommu fault handler for display related modules, register a fault handler for the backing mmu object of msm_kms. Currently, the fault handler only captures the display snapshot but we can expand this later if more information needs to be added to debug display mmu faults. Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com> --- drivers/gpu/drm/msm/msm_kms.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)