diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/4661-drm-amdgpu-gmc9-disable-partial-wr-rmw-if-ECC-is-not.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.14.71/4661-drm-amdgpu-gmc9-disable-partial-wr-rmw-if-ECC-is-not.patch | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/4661-drm-amdgpu-gmc9-disable-partial-wr-rmw-if-ECC-is-not.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/4661-drm-amdgpu-gmc9-disable-partial-wr-rmw-if-ECC-is-not.patch new file mode 100644 index 00000000..80ac368f --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/4661-drm-amdgpu-gmc9-disable-partial-wr-rmw-if-ECC-is-not.patch @@ -0,0 +1,32 @@ +From 9c1ba9daa7a50291ab825e16d0226c8267e498ab Mon Sep 17 00:00:00 2001 +From: Alex Deucher <alexander.deucher@amd.com> +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 <Hawking.Zhang@amd.com> +Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com> +Signed-off-by: Alex Deucher <alexander.deucher@amd.com> +--- + 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 + |