Merge branch 'msm-next' of git://people.freedesktop.org/~robclark/linux into drm-next

Noteworthy changes this time:
1) 4k support for newer chips (ganging up hwpipes and mixers)
2) using OPP bindings for gpu
3) more prep work towards per-process pagetables

* 'msm-next' of git://people.freedesktop.org/~robclark/linux: (47 commits)
  msm/drm: gpu: Dynamically locate the clocks from the device tree
  drm/msm: gpu: Use OPP tables if we can
  drm/msm: Hard code the GPU "slow frequency"
  drm/msm: Add MSM_PARAM_GMEM_BASE
  drm/msm: Reference count address spaces
  drm/msm: Make sure to detach the MMU during GPU cleanup
  drm/msm/mdp5: Enable 3D mux in mdp5_ctl
  drm/msm/mdp5: Reset CTL blend registers before configuring them
  drm/msm/mdp5: Assign 'right' mixer to CRTC state
  drm/msm/mdp5: Stage border out on base stage if CRTC has 2 LMs
  drm/msm/mdp5: Stage right side hwpipes on Right-side Layer Mixer
  drm/msm/mdp5: Prepare Layer Mixers for source split
  drm/msm/mdp5: Configure 'right' hwpipe
  drm/msm/mdp5: Assign a 'right hwpipe' to plane state
  drm/msm/mdp5: Create mdp5_hwpipe_mode_set
  drm/msm/mdp5: Add optional 'right' Layer Mixer in CRTC state
  drm/msm/mdp5: Add a CAP for Source Split
  drm/msm/mdp5: Remove mixer/intf pointers from mdp5_ctl
  drm/msm/mdp5: Start using parameters from CRTC state
  drm/msm/mdp5: Add more stuff to CRTC state
  ...

1 files changed, 26 insertions, 9 deletions

diff --git a/drivers/gpu/drm/msm/msm_gem_vma.c b/drivers/gpu/drm/msm/msm_gem_vma.c
index b654eca7636a..f285d7e210db 100644
--- a/drivers/gpu/drm/msm/msm_gem_vma.c
+++ b/drivers/gpu/drm/msm/msm_gem_vma.c
@@ -19,6 +19,25 @@
 #include "msm_gem.h"
 #include "msm_mmu.h"
 
+static void
+msm_gem_address_space_destroy(struct kref *kref)
+{
+	struct msm_gem_address_space *aspace = container_of(kref,
+			struct msm_gem_address_space, kref);
+
+	drm_mm_takedown(&aspace->mm);
+	if (aspace->mmu)
+		aspace->mmu->funcs->destroy(aspace->mmu);
+	kfree(aspace);
+}
+
+
+void msm_gem_address_space_put(struct msm_gem_address_space *aspace)
+{
+	if (aspace)
+		kref_put(&aspace->kref, msm_gem_address_space_destroy);
+}
+
 void
 msm_gem_unmap_vma(struct msm_gem_address_space *aspace,
 		struct msm_gem_vma *vma, struct sg_table *sgt)
@@ -34,6 +53,8 @@ msm_gem_unmap_vma(struct msm_gem_address_space *aspace,
 	drm_mm_remove_node(&vma->node);
 
 	vma->iova = 0;
+
+	msm_gem_address_space_put(aspace);
 }
 
 int
@@ -57,16 +78,10 @@ msm_gem_map_vma(struct msm_gem_address_space *aspace,
 				size, IOMMU_READ | IOMMU_WRITE);
 	}
 
-	return ret;
-}
+	/* Get a reference to the aspace to keep it around */
+	kref_get(&aspace->kref);
 
-void
-msm_gem_address_space_destroy(struct msm_gem_address_space *aspace)
-{
-	drm_mm_takedown(&aspace->mm);
-	if (aspace->mmu)
-		aspace->mmu->funcs->destroy(aspace->mmu);
-	kfree(aspace);
+	return ret;
 }
 
 struct msm_gem_address_space *
@@ -85,5 +100,7 @@ msm_gem_address_space_create(struct device *dev, struct iommu_domain *domain,
 	drm_mm_init(&aspace->mm, (domain->geometry.aperture_start >> PAGE_SHIFT),
 			(domain->geometry.aperture_end >> PAGE_SHIFT) - 1);
 
+	kref_init(&aspace->kref);
+
 	return aspace;
 }