From: Christopher James Halse Rogers christopher.halse.rogers@canonical.com
[ Upstream commit 1769152ac64b0b07583f696b621624df2ca4c840 ]
Any use of the framebuffer will migrate it to VRAM, which is not sensible for an imported dma-buf.
v2: Use DRM_DEBUG_KMS to prevent userspace accidentally spamming dmesg.
Reviewed-by: Michel Dänzer michel.daenzer@amd.com Reviewed-by: Christian König christian.koenig@amd.com Signed-off-by: Christopher James Halse Rogers christopher.halse.rogers@canonical.com CC: amd-gfx@lists.freedesktop.org Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c index 083e2b429872..15a2d8f3725d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c @@ -533,6 +533,12 @@ amdgpu_user_framebuffer_create(struct drm_device *dev, return ERR_PTR(-ENOENT); }
+ /* Handle is imported dma-buf, so cannot be migrated to VRAM for scanout */ + if (obj->import_attach) { + DRM_DEBUG_KMS("Cannot create framebuffer from imported dma_buf\n"); + return ERR_PTR(-EINVAL); + } + amdgpu_fb = kzalloc(sizeof(*amdgpu_fb), GFP_KERNEL); if (amdgpu_fb == NULL) { drm_gem_object_unreference_unlocked(obj);