diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2026-02-16 10:02:32 -0500 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2026-03-04 07:20:24 -0500 |
| commit | d775c86e746b5db34de64e5d920c324135475f74 (patch) | |
| tree | 540c771b58408377886bad9e32724cde796d65c7 | |
| parent | 0f589ee54fd6d76d3f75e745f7f12c64cbd749e5 (diff) | |
drm/amdgpu: keep vga memory on MacBooks with switchable graphics
[ Upstream commit 096bb75e13cc508d3915b7604e356bcb12b17766 ]
On Intel MacBookPros with switchable graphics, when the iGPU
is enabled, the address of VRAM gets put at 0 in the dGPU's
virtual address space. This is non-standard and seems to cause
issues with the cursor if it ends up at 0. We have the framework
to reserve memory at 0 in the address space, so enable it here if
the vram start address is 0.
Reviewed-and-tested-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4302
Cc: stable@vger.kernel.org
Cc: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c index ff4e22673930..170fa9215e16 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c @@ -489,6 +489,16 @@ void amdgpu_gmc_get_vbios_allocations(struct amdgpu_device *adev) case CHIP_RENOIR: adev->mman.keep_stolen_vga_memory = true; break; + case CHIP_POLARIS10: + case CHIP_POLARIS11: + case CHIP_POLARIS12: + /* MacBookPros with switchable graphics put VRAM at 0 when + * the iGPU is enabled which results in cursor issues if + * the cursor ends up at 0. Reserve vram at 0 in that case. + */ + if (adev->gmc.vram_start == 0) + adev->mman.keep_stolen_vga_memory = true; + break; default: adev->mman.keep_stolen_vga_memory = false; break; |