For SR-IOV, vram_width can't be read from ATOM as
RAVEN, and DF related registers is not readable, so hardcord
is the only way to set the correct vram_width.
Signed-off-by: Trigger Huang <Trigger.Huang@xxxxxxx>
Signed-off-by: Yintian Tao <yttao@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 10 +++++++++-
1 file changed, 9 insertions(+), 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 59c580bd5a3b..9750b632e9aa 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -835,8 +835,16 @@ static int gmc_v9_0_mc_init(struct amdgpu_device *adev)
int chansize, numchan;
int r;
- if (amdgpu_emu_mode != 1)
+ if (amdgpu_sriov_vf(adev)) {
+ /* For Vega10 SR-IOV, vram_width can't be read from ATOM as RAVEN,
+ * and DF related registers is not readable, seems hardcord is the
+ * only way to set the correct vram_width
+ */
+ adev->gmc.vram_width = 2048;
+ } else if (amdgpu_emu_mode != 1) {
adev->gmc.vram_width = amdgpu_atomfirmware_get_vram_width(adev);
+ }
+
if (!adev->gmc.vram_width) {
/* hbm memory channel size */
if (adev->flags & AMD_IS_APU)
--
2.20.1
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