From 240c811ccde49ad336b23c582018c6001690f19d Mon Sep 17 00:00:00 2001 From: "Tianci.Yin" Date: Mon, 20 Jan 2020 15:08:35 +0800 Subject: drm/amdgpu: fix VRAM partially encroached issue in GDDR6 memory training(V2) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit [why] In GDDR6 BIST training, a certain mount of bottom VRAM will be encroached by UMC, that causes problems(like GTT corrupted and page fault observed). [how] Saving the content of this bottom VRAM to system memory before training, and restoring it after training to avoid VRAM corruption. Acked-by: Christian König Signed-off-by: Tianci.Yin Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h index 3265487b859f..611021514c52 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h @@ -172,6 +172,8 @@ struct psp_dtm_context { #define MEM_TRAIN_SYSTEM_SIGNATURE 0x54534942 #define GDDR6_MEM_TRAINING_DATA_SIZE_IN_BYTES 0x1000 #define GDDR6_MEM_TRAINING_OFFSET 0x8000 +/*Define the VRAM size that will be encroached by BIST training.*/ +#define GDDR6_MEM_TRAINING_ENCROACHED_SIZE 0x2000000 enum psp_memory_training_init_flag { PSP_MEM_TRAIN_NOT_SUPPORT = 0x0, -- cgit v1.2.3