From ee94a65f192c05c543b4d3ad7137cd696b5c18fc Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Timur=20Krist=C3=B3f?= Date: Mon, 25 May 2026 13:33:18 +0200 Subject: [PATCH] drm/amdgpu: Fix amdgpu_bo_move() when old_mem and new_mem are both GTT MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The UVD code relies on GTT to GTT moves in order to ensure that its BOs don't cross 256M segments. Fixes: bfe5e585b44f ("drm/ttm: move last binding into the drivers.") Signed-off-by: Timur Kristóf Reviewed-by: Christian König Signed-off-by: Alex Deucher (cherry picked from commit 21fd45e5e2628d00b478590bcc3d14d3de5d45b6) Cc: stable@vger.kernel.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 2740de94e93c..16c060badaee 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -515,6 +515,15 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict, if (new_mem->mem_type == TTM_PL_TT || new_mem->mem_type == AMDGPU_PL_PREEMPT) { + if (old_mem && (old_mem->mem_type == TTM_PL_TT || + old_mem->mem_type == AMDGPU_PL_PREEMPT)) { + r = ttm_bo_wait_ctx(bo, ctx); + if (r) + return r; + + amdgpu_ttm_backend_unbind(bo->bdev, bo->ttm); + } + r = amdgpu_ttm_backend_bind(bo->bdev, bo->ttm, new_mem); if (r) return r; @@ -549,6 +558,15 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict, ttm_bo_assign_mem(bo, new_mem); return 0; } + if ((old_mem->mem_type == TTM_PL_TT || + old_mem->mem_type == AMDGPU_PL_PREEMPT) && + (new_mem->mem_type == TTM_PL_TT || + new_mem->mem_type == AMDGPU_PL_PREEMPT)) { + amdgpu_bo_move_notify(bo, evict, new_mem); + ttm_resource_free(bo, &bo->resource); + ttm_bo_assign_mem(bo, new_mem); + return 0; + } if (old_mem->mem_type == AMDGPU_PL_GDS || old_mem->mem_type == AMDGPU_PL_GWS ||