diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2936-drm-amdgpu-bypass-FB-resizing-for-SRIOV-VF.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2936-drm-amdgpu-bypass-FB-resizing-for-SRIOV-VF.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2936-drm-amdgpu-bypass-FB-resizing-for-SRIOV-VF.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2936-drm-amdgpu-bypass-FB-resizing-for-SRIOV-VF.patch new file mode 100644 index 00000000..4d8618bd --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2936-drm-amdgpu-bypass-FB-resizing-for-SRIOV-VF.patch @@ -0,0 +1,37 @@ +From 0f18a09d4fd3b807f12c54e8e88b6b8092c40b1b Mon Sep 17 00:00:00 2001 +From: pding <Pixel.Ding@amd.com> +Date: Tue, 7 Nov 2017 11:02:00 +0800 +Subject: [PATCH 2936/4131] drm/amdgpu: bypass FB resizing for SRIOV VF +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +It introduces 900ms latency in exclusive mode which causes failure +of driver loading. Host can resize the BAR before guest staring, +so the resizing is not necessary here. + +Signed-off-by: Pixel Ding <Pixel.Ding@amd.com> +Reviewed-by: Christian König <christian.koenig@amd.com> +Reviewed-by: Alex Deucher <alexander.deucher@amd.com> +--- + drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +index dc7c6e5..39dcc4e 100644 +--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c ++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +@@ -742,6 +742,10 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev) + u16 cmd; + int r; + ++ /* Bypass for VF */ ++ if (amdgpu_sriov_vf(adev)) ++ return 0; ++ + /* Disable memory decoding while we change the BAR addresses and size */ + pci_read_config_word(adev->pdev, PCI_COMMAND, &cmd); + pci_write_config_word(adev->pdev, PCI_COMMAND, +-- +2.7.4 + |