Am 01.02.21 um 16:06 schrieb Shashank Sharma:
Hello Christian,
On 01/02/21 8:04 pm, Christian König wrote:
Some newer APUs can scanout directly from GTT, that saves us from
allocating another bounce buffer in VRAM and enables freesync in such
configurations.
Shall we add some more details about how this patch helps with VRR, like "Without
this patch, it won't be possible for the IGPU to flip buffers which are composed on an
external GPU" or something in those lines ?
How about:
"Without this patch creating a framebuffer from the imported BO will
fail and userspace will fall back to a copy".
Thanks,
Christian.
Signed-off-by: Christian König <christian.koe...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 8 ++++++--
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 2 +-
2 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index a638709e9c92..823bc25d87de 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -930,8 +930,10 @@ amdgpu_display_user_framebuffer_create(struct drm_device
*dev,
struct drm_file *file_priv,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
- struct drm_gem_object *obj;
struct amdgpu_framebuffer *amdgpu_fb;
+ struct drm_gem_object *obj;
+ struct amdgpu_bo *bo;
+ uint32_t domains;
int ret;
obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
@@ -942,7 +944,9 @@ amdgpu_display_user_framebuffer_create(struct drm_device
*dev,
}
/* Handle is imported dma-buf, so cannot be migrated to VRAM for scanout */
- if (obj->import_attach) {
+ bo = gem_to_amdgpu_bo(obj);
Is it possible that the bo can be NULL ? I mean do we need a NULL check here ?
+ domains = amdgpu_display_supported_domains(drm_to_adev(dev), bo->flags);
+ if (obj->import_attach && !(domains & AMDGPU_GEM_DOMAIN_GTT)) {
drm_dbg_kms(dev, "Cannot create framebuffer from imported
dma_buf\n");
return ERR_PTR(-EINVAL);
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 56854a3ee19c..0bd22ed1dacf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -900,7 +900,7 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32
domain,
return -EINVAL;
/* A shared bo cannot be migrated to VRAM */
- if (bo->prime_shared_count) {
+ if (bo->prime_shared_count || bo->tbo.base.import_attach) {
With the above concerns addressed (or reasoned :)), please feel free to use:
Reviewed-by: Shashank Sharma <shashank.sha...@amd.com>
- Shashank
if (domain & AMDGPU_GEM_DOMAIN_GTT)
domain = AMDGPU_GEM_DOMAIN_GTT;
else
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