From e1d1a7729a62d7b79fb2ab4ac3bc6fc0ebfb6db9 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 10 May 2018 15:15:12 -0500 Subject: [PATCH] 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 b60ed288d314..3c0a85d4e4ab 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c @@ -675,6 +675,7 @@ 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;