From: Christian König <[email protected]> We don't need to use the PCI BAR on APUs. This allows us to access the full VRAM directly without being limited by the BAR size.
Signed-off-by: Christian König <[email protected]> --- drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c index 3a25f72..70585b1 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c @@ -375,9 +375,16 @@ static int gmc_v7_0_mc_init(struct amdgpu_device *adev) /* size in MB on si */ adev->mc.mc_vram_size = RREG32(mmCONFIG_MEMSIZE) * 1024ULL * 1024ULL; adev->mc.real_vram_size = RREG32(mmCONFIG_MEMSIZE) * 1024ULL * 1024ULL; - adev->mc.visible_vram_size = adev->mc.aper_size; + +#ifdef CONFIG_X86_64 + if (adev->flags & AMD_IS_APU) { + adev->mc.aper_base = RREG32(mmMC_VM_FB_OFFSET) << 22ULL; + adev->mc.aper_size = adev->mc.real_vram_size; + } +#endif /* In case the PCI BAR is larger than the actual amount of vram */ + adev->mc.visible_vram_size = adev->mc.aper_size; if (adev->mc.visible_vram_size > adev->mc.real_vram_size) adev->mc.visible_vram_size = adev->mc.real_vram_size; -- 2.7.4 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
