Am 27.08.21 um 10:45 schrieb Yifan Zhang:
current preferred domain policy is static, which makes vram > 256M
APU never get a chance to allocate system S/G framebuffer. Change
this policy to take vram memory pressure into accout. If system
support both vram/system memory, return the preferred domain based
on vram usage.
Signed-off-by: Yifan Zhang <yifan1.zhang@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 65a9b23f0a46..ea3b084e3c3f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -1530,7 +1530,9 @@ uint32_t amdgpu_bo_get_preferred_domain(struct amdgpu_device *adev,
{
if (domain == (AMDGPU_GEM_DOMAIN_VRAM | AMDGPU_GEM_DOMAIN_GTT)) {
domain = AMDGPU_GEM_DOMAIN_VRAM;
- if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD)
+ if (adev->gmc.real_vram_size -
+ atomic64_read(&adev->mman.vram_mgr.vis_usage) <=
+ AMDGPU_SG_THRESHOLD)
Well apart from that you are accessing a private member of the vram
manager and have messed up the coding style I don't think that this is a
good idea at all from the design point of view.
Scanning out from SG has some huge disadvantages (unstable on some HW
generations, more walker overhead etc) that we certainly don't want to
enable it unless we don't absolutely need it.
Christian.
domain = AMDGPU_GEM_DOMAIN_GTT;
}
return domain;
