From: Xiangliang Yu <[email protected]>

Change ioremap mode from noncache to write combine and it will
reduce the read vbios time from 188ms to 8ms.

Signed-off-by: Xiangliang Yu <[email protected]>
Signed-off-by: Xiangliang.Yu <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
index ea3a250..c21adf6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
@@ -104,7 +104,7 @@ static bool igp_read_bios_from_vram(struct amdgpu_device 
*adev)
 
        adev->bios = NULL;
        vram_base = pci_resource_start(adev->pdev, 0);
-       bios = ioremap(vram_base, size);
+       bios = ioremap_wc(vram_base, size);
        if (!bios) {
                return false;
        }
-- 
2.7.4

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