[PATCH 3/6] drm/amdgpu: don't clean the framebuffer for VF

[Liu, Monk]

NAK

This behavior that Hypervisor cleans framebuffer for each VF is only on AWS, 
Regular GIM doesn't clean framebuffer after FLR, so guest driver still need this cleaning,

Please keep this patch in your AWS branch only.

BR Monk

-----Original Message-----
From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf Of Xiangliang Yu
Sent: Thursday, May 04, 2017 2:34 PM
To: amd-gfx at lists.freedesktop.org
Cc: Ding, Pixel <Pixel.Ding at amd.com>; Yu, Xiangliang <Xiangliang.Yu at amd.com>
Subject: [PATCH 3/6] drm/amdgpu: don't clean the framebuffer for VF

From: Pixel Ding <Pixel.Ding at amd.com>

The SRIOV host driver cleans framebuffer for each VF, guest driver needn't this action which costs much time on some virtualization platform, otherwise it might get timeout to initialize.

Signed-off-by: Pixel Ding <Pixel.Ding at amd.com>
Signed-off-by: Xiangliang Yu <Xiangliang.Yu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
index e869e60..6f5d994 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
@@ -242,6 +242,9 @@ static int amdgpufb_create(struct drm_fb_helper *helper,
 	/* setup helper */
 	rfbdev->helper.fb = fb;
 
+	if (!amdgpu_sriov_vf(adev))
+		memset_io(abo->kptr, 0x0, amdgpu_bo_size(abo));
+
 	strcpy(info->fix.id, "amdgpudrmfb");
 
 	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
--
2.7.4

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