From: Shashank Sharma <shashank.sharma@xxxxxxx>
This patch sets 'AMDGPU_GEM_CREATE_CPU_GTT_USWC' as input
parameter flag, during object creation of an imported DMA
buffer.
In absence of this flag:
1. Function amdgpu_display_supported_domains() doesn't add
AMDGPU_GEM_DOMAIN_GTT as supported domain.
2. Due to which, Function amdgpu_display_user_framebuffer_create()
refuses to create framebuffer for imported DMA buffers.
3. Due to which, AddFB() IOCTL fails.
4. Due to which, amdgpu_present_check_flip() check fails in DDX
5. Due to which DDX driver doesn't allow flips (goes to blitting)
6. Due to which setting Freesync/VRR property fails for PRIME buffers.
So, this patch finally enables Freesync with PRIME buffer offloading.
v2 (chk): instead of just checking the flag we copy it over if the
exporter is an amdgpu device as well.
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxx>
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
index d3727f3ab277..a54a870f006c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
@@ -422,14 +422,22 @@ amdgpu_dma_buf_create_obj(struct drm_device *dev, struct dma_buf *dma_buf)
{
struct dma_resv *resv = dma_buf->resv;
struct amdgpu_device *adev = drm_to_adev(dev);
- struct amdgpu_bo *bo;
struct drm_gem_object *gobj;
+ struct amdgpu_bo *bo;
+ uint64_t flags = 0;
int ret;
dma_resv_lock(resv, NULL);
+
+ if (dma_buf->ops == &amdgpu_dmabuf_ops) {
+ struct amdgpu_bo *other = gem_to_amdgpu_bo(dma_buf->priv);
+
+ flags |= other->flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC;
+ }
+
ret = amdgpu_gem_object_create(adev, dma_buf->size, PAGE_SIZE,
- AMDGPU_GEM_DOMAIN_CPU,
- 0, ttm_bo_type_sg, resv, &gobj);
+ AMDGPU_GEM_DOMAIN_CPU, flags,
+ ttm_bo_type_sg, resv, &gobj);
if (ret)
goto error;
--
2.25.1
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