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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
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