[PATCH] drm/amdgpu: clear framebuffer with GPU

[Pixel Ding]

CPU is not efficient to do this job. There's a failure caused by this
is that handshaking gets timeout of SRIOV virtual function.

Signed-off-by: Pixel Ding <Pixel.Ding at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
index 1e735c4..2867f55 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
@@ -148,7 +148,8 @@ static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 	ret = amdgpu_gem_object_create(adev, aligned_size, 0,
 				       AMDGPU_GEM_DOMAIN_VRAM,
 				       AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
-				       AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS,
+				       AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
+				       AMDGPU_GEM_CREATE_VRAM_CLEARED,
 				       true, &gobj);
 	if (ret) {
 		printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
@@ -242,8 +243,6 @@ static int amdgpufb_create(struct drm_fb_helper *helper,
 	/* setup helper */
 	rfbdev->helper.fb = fb;
 
-	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