[PATCH] drm/amdgpu: don't read DF register for SRIOV

[Tao, Yintian]

Ping...

Hi Christian and Alex


Can you help review this? Thanks in advance.


Best Regards
Yintian Tao

-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Yintian Tao
Sent: Thursday, May 16, 2019 8:11 PM
To: amd-gfx at lists.freedesktop.org
Cc: Liu, Monk <Monk.Liu at amd.com>; Tao, Yintian <Yintian.Tao at amd.com>
Subject: [PATCH] drm/amdgpu: don't read DF register for SRIOV

[CAUTION: External Email]

Under SRIOV, reading DF register has chance to lead to AER error in host side, just skip reading it.

Signed-off-by: Monk Liu <Monk.Liu at amd.com>
Signed-off-by: Yintian Tao <yttao at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index a417763..b5bf9ed 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -837,7 +837,7 @@ static int gmc_v9_0_mc_init(struct amdgpu_device *adev)

        if (amdgpu_emu_mode != 1)
                adev->gmc.vram_width = amdgpu_atomfirmware_get_vram_width(adev);
-       if (!adev->gmc.vram_width) {
+       if (!adev->gmc.vram_width && !amdgpu_sriov_vf(adev)) {
                /* hbm memory channel size */
                if (adev->flags & AMD_IS_APU)
                        chansize = 64;
--
2.7.4

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