From 9c1ba9daa7a50291ab825e16d0226c8267e498ab Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 10 May 2018 15:15:12 -0500 Subject: [PATCH 4661/5725] drm/amdgpu/gmc9: disable partial wr rmw if ECC is not enabled The vbios mistakenly sets this bit on some boards without ECC. This can lead to reduced performance in some workloads. Disable the bit if the board does not have ECC. Reviewed-by: Hawking Zhang Reviewed-by: Junwei Zhang Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c index 1f3249b..ad65e57c 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c @@ -674,6 +674,7 @@ static int gmc_v9_0_late_init(void *handle) DRM_INFO("ECC is active.\n"); } else if (r == 0) { DRM_INFO("ECC is not present.\n"); + adev->df_funcs->enable_ecc_force_par_wr_rmw(adev, false); } else { DRM_ERROR("gmc_v9_0_ecc_available() failed. r: %d\n", r); return r; -- 2.7.4