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From f1c08cd5c424814dd37cb1efa97aad069dddec5b Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 17 May 2019 09:31:43 -0500
Subject: [PATCH 1991/2940] drm/amdgpu/gmc9: set vram_width properly for SR-IOV
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.
Reviewed-by: Yintian Tao <yttao@amd.com>
Signed-off-by: Trigger Huang <Trigger.Huang@amd.com>
Signed-off-by: Yintian Tao <yttao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
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 e04975170f83..2d6fb6dff58c 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -832,8 +832,16 @@ 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)
--
2.17.1
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