From 3646cc65e2747ff112d7de1a05a2e756414b771e Mon Sep 17 00:00:00 2001
From: Victor Lu <victorchengchi.lu@amd.com>
Date: Thu, 13 Feb 2025 18:41:26 -0500
Subject: [PATCH] drm/amdgpu: Do not write to GRBM_CNTL if Aldebaran SRIOV
Aldebaran SRIOV VF does not have write permissions to GRBM_CTNL.
This access can be skipped to avoid a dmesg warning.
v2: Use GC IP version check instead of asic check
Signed-off-by: Victor Lu <victorchengchi.lu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index f7938d318f261..1f0f03108a820 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -2637,7 +2637,10 @@ static void gfx_v9_0_constants_init(struct amdgpu_device *adev)
u32 tmp;
int i;
- WREG32_FIELD15_RLC(GC, 0, GRBM_CNTL, READ_TIMEOUT, 0xff);
+ if (!amdgpu_sriov_vf(adev) ||
+ amdgpu_ip_version(adev, GC_HWIP, 0) != IP_VERSION(9, 4, 2)) {
+ WREG32_FIELD15_RLC(GC, 0, GRBM_CNTL, READ_TIMEOUT, 0xff);
+ }
gfx_v9_0_tiling_mode_table_init(adev);
--
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