From 759e764f7d587283b4e0b01ff930faca64370e59 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 30 Jan 2025 15:20:05 -0500 Subject: [PATCH] drm/amdkfd: use GTT for VRAM on APUs only if GTT is larger If the user has configured a large carveout on a small APU, only use GTT for VRAM allocations if GTT is larger than VRAM. v2: fix reversed check (Philip) Reviewed-by: Mario Limonciello Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index e68324ee4b25..bcb4bcc4ab75 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1987,8 +1987,10 @@ int amdgpu_ttm_init(struct amdgpu_device *adev) DRM_INFO("amdgpu: %uM of GTT memory ready.\n", (unsigned int)(gtt_size / (1024 * 1024))); - if (adev->flags & AMD_IS_APU) - adev->apu_prefer_gtt = true; + if (adev->flags & AMD_IS_APU) { + if (adev->gmc.real_vram_size < gtt_size) + adev->apu_prefer_gtt = true; + } /* Initialize doorbell pool on PCI BAR */ r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_DOORBELL, adev->doorbell.size / PAGE_SIZE); -- 2.50.1