From 0f18a09d4fd3b807f12c54e8e88b6b8092c40b1b Mon Sep 17 00:00:00 2001 From: pding 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 Reviewed-by: Christian König Reviewed-by: Alex Deucher --- 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