Merge tag 'drm/tegra/for-4.14-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next

drm/tegra: Changes for v4.14-rc1

This contains a couple of fixes and improvements for host1x, with some
preparatory work for Tegra186 support.

The remainder is cleanup and minor bugfixes for Tegra DRM along with
enhancements to debuggability.

There have also been some enhancements to the kernel interfaces for
host1x job submissions and support for mmap'ing PRIME buffers directly,
all of which get the interfaces very close to ready for serious work.

* tag 'drm/tegra/for-4.14-rc1' of git://anongit.freedesktop.org/tegra/linux: (21 commits)
  drm/tegra: Prevent BOs from being freed during job submission
  drm/tegra: gem: Implement mmap() for PRIME buffers
  drm/tegra: Support render node
  drm/tegra: sor: Trace register accesses
  drm/tegra: dpaux: Trace register accesses
  drm/tegra: dsi: Trace register accesses
  drm/tegra: hdmi: Trace register accesses
  drm/tegra: dc: Trace register accesses
  drm/tegra: sor: Use unsigned int for register offsets
  drm/tegra: hdmi: Use unsigned int for register offsets
  drm/tegra: dsi: Use unsigned int for register offsets
  drm/tegra: dpaux: Use unsigned int for register offsets
  drm/tegra: dc: Use unsigned int for register offsets
  drm/tegra: Fix NULL deref in debugfs/iova
  drm/tegra: switch to drm_*_get(), drm_*_put() helpers
  drm/tegra: Set MODULE_FIRMWARE for the VIC
  drm/tegra: Add CONFIG_OF dependency
  gpu: host1x: Support sub-devices recursively
  gpu: host1x: fix error return code in host1x_probe()
  gpu: host1x: Fix bitshift/mask multipliers
  ...

1 files changed, 38 insertions, 19 deletions

diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index c6079affe642..ab1e53d434e8 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -24,7 +24,7 @@ static void tegra_bo_put(struct host1x_bo *bo)
 {
 	struct tegra_bo *obj = host1x_to_tegra_bo(bo);
 
-	drm_gem_object_unreference_unlocked(&obj->gem);
+	drm_gem_object_put_unlocked(&obj->gem);
 }
 
 static dma_addr_t tegra_bo_pin(struct host1x_bo *bo, struct sg_table **sgt)
@@ -95,7 +95,7 @@ static struct host1x_bo *tegra_bo_get(struct host1x_bo *bo)
 {
 	struct tegra_bo *obj = host1x_to_tegra_bo(bo);
 
-	drm_gem_object_reference(&obj->gem);
+	drm_gem_object_get(&obj->gem);
 
 	return bo;
 }
@@ -325,7 +325,7 @@ struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file,
 		return ERR_PTR(err);
 	}
 
-	drm_gem_object_unreference_unlocked(&bo->gem);
+	drm_gem_object_put_unlocked(&bo->gem);
 
 	return bo;
 }
@@ -460,30 +460,28 @@ const struct vm_operations_struct tegra_bo_vm_ops = {
 	.close = drm_gem_vm_close,
 };
 
-int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma)
+static int tegra_gem_mmap(struct drm_gem_object *gem,
+			  struct vm_area_struct *vma)
 {
-	struct drm_gem_object *gem;
-	struct tegra_bo *bo;
-	int ret;
-
-	ret = drm_gem_mmap(file, vma);
-	if (ret)
-		return ret;
-
-	gem = vma->vm_private_data;
-	bo = to_tegra_bo(gem);
+	struct tegra_bo *bo = to_tegra_bo(gem);
 
 	if (!bo->pages) {
 		unsigned long vm_pgoff = vma->vm_pgoff;
+		int err;
 
+		/*
+		 * Clear the VM_PFNMAP flag that was set by drm_gem_mmap(),
+		 * and set the vm_pgoff (used as a fake buffer offset by DRM)
+		 * to 0 as we want to map the whole buffer.
+		 */
 		vma->vm_flags &= ~VM_PFNMAP;
 		vma->vm_pgoff = 0;
 
-		ret = dma_mmap_wc(gem->dev->dev, vma, bo->vaddr, bo->paddr,
+		err = dma_mmap_wc(gem->dev->dev, vma, bo->vaddr, bo->paddr,
 				  gem->size);
-		if (ret) {
+		if (err < 0) {
 			drm_gem_vm_close(vma);
-			return ret;
+			return err;
 		}
 
 		vma->vm_pgoff = vm_pgoff;
@@ -499,6 +497,20 @@ int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma)
 	return 0;
 }
 
+int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct drm_gem_object *gem;
+	int err;
+
+	err = drm_gem_mmap(file, vma);
+	if (err < 0)
+		return err;
+
+	gem = vma->vm_private_data;
+
+	return tegra_gem_mmap(gem, vma);
+}
+
 static struct sg_table *
 tegra_gem_prime_map_dma_buf(struct dma_buf_attachment *attach,
 			    enum dma_data_direction dir)
@@ -582,7 +594,14 @@ static void tegra_gem_prime_kunmap(struct dma_buf *buf, unsigned long page,
 
 static int tegra_gem_prime_mmap(struct dma_buf *buf, struct vm_area_struct *vma)
 {
-	return -EINVAL;
+	struct drm_gem_object *gem = buf->priv;
+	int err;
+
+	err = drm_gem_mmap_obj(gem, gem->size, vma);
+	if (err < 0)
+		return err;
+
+	return tegra_gem_mmap(gem, vma);
 }
 
 static void *tegra_gem_prime_vmap(struct dma_buf *buf)
@@ -633,7 +652,7 @@ struct drm_gem_object *tegra_gem_prime_import(struct drm_device *drm,
 		struct drm_gem_object *gem = buf->priv;
 
 		if (gem->dev == drm) {
-			drm_gem_object_reference(gem);
+			drm_gem_object_get(gem);
 			return gem;
 		}
 	}