From 518304cbf3b2452e1e592e06bed65baced0a530d Mon Sep 17 00:00:00 2001 From: Jeffrey Hugo Date: Mon, 8 Jul 2019 08:12:24 -0700 Subject: [PATCH] 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 --- drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) 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) mdelay(16); 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); -- 2.11.0