path: root/drivers/gpu
diff options
authorJeffrey Hugo <>2019-07-08 08:12:24 -0700
committerRob Clark <>2019-09-03 16:16:58 -0700
commit518304cbf3b2452e1e592e06bed65baced0a530d (patch)
treeb3e4c78fb3debbd043cce685ef88f4401207fe45 /drivers/gpu
parentadd5bff4aa769108d05fbef0240000e7334a33b9 (diff)
drm/msm/mdp5: Find correct node for creating gem address space
Creating the msm gem address space requires a reference to the dev where the iommu is located. The driver currently assumes this is the same as the platform device, which breaks when the iommu is outside of the platform device (ie in the parent). Default to using the platform device, but check to see if that has an iommu reference, and if not, use the parent device instead. This should handle all the various iommu designs for mdp5 supported systems. Signed-off-by: Jeffrey Hugo <> Tested-by: Bjorn Andersson <> Signed-off-by: Rob Clark <>
Diffstat (limited to 'drivers/gpu')
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index 13416dc229c0..0beca82661c5 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -669,6 +669,7 @@ struct msm_kms *mdp5_kms_init(struct drm_device *dev)
struct msm_kms *kms;
struct msm_gem_address_space *aspace;
int irq, i, ret;
+ struct device *iommu_dev;
/* priv->kms would have been populated by the MDP5 driver */
kms = priv->kms;
@@ -708,7 +709,11 @@ struct msm_kms *mdp5_kms_init(struct drm_device *dev)
if (config->platform.iommu) {
- aspace = msm_gem_address_space_create(&pdev->dev,
+ iommu_dev = &pdev->dev;
+ if (!iommu_dev->iommu_fwspec)
+ iommu_dev = iommu_dev->parent;
+ aspace = msm_gem_address_space_create(iommu_dev,
config->platform.iommu, "mdp5");
if (IS_ERR(aspace)) {
ret = PTR_ERR(aspace);