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Revert "drm/amd: Disable S/G for APUs when 64GB or more host memory"

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This reverts commit 70e64c4d52.

Since, we now have an actual fix for this issue, we can get rid of this
workaround as it can cause pin failures if enough VRAM isn't carved out
by the BIOS.

Cc: stable@vger.kernel.org # 6.1+
Acked-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hamza Mahfooz
2023-09-08 10:36:44 -04:00
committed by Alex Deucher
parent ef064187a9
commit 169ed4ece8
3 changed files with 3 additions and 29 deletions
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26
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@@ -1244,32 +1244,6 @@ bool amdgpu_device_need_post(struct amdgpu_device *adev)
return true;
}
/*
* On APUs with >= 64GB white flickering has been observed w/ SG enabled.
* Disable S/G on such systems until we have a proper fix.
* https://gitlab.freedesktop.org/drm/amd/-/issues/2354
* https://gitlab.freedesktop.org/drm/amd/-/issues/2735
*/
bool amdgpu_sg_display_supported(struct amdgpu_device *adev)
{
switch (amdgpu_sg_display) {
case -1:
break;
case 0:
return false;
case 1:
return true;
default:
return false;
}
if ((totalram_pages() << (PAGE_SHIFT - 10)) +
(adev->gmc.real_vram_size / 1024) >= 64000000) {
DRM_WARN("Disabling S/G due to >=64GB RAM\n");
return false;
}
return true;
}
/*
* Intel hosts such as Raptor Lake and Sapphire Rapids don't support dynamic
* speed switching. Until we have confirmation from Intel that a specific host