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| author | Tom St Denis <tom.stdenis@amd.com> | 2018-02-26 09:09:26 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-02-26 23:09:47 -0500 |
| commit | 585b7f161c85bd5ca675b97580faf21c506541e3 (patch) | |
| tree | db671c25b34215de2d07c963db7d3b96ceea410a /drivers/gpu/drm/amd/amdgpu | |
| parent | 45a9d154f61519b64c95bf27ef341e0b50931998 (diff) | |
| download | linux-585b7f161c85bd5ca675b97580faf21c506541e3.tar.gz linux-585b7f161c85bd5ca675b97580faf21c506541e3.tar.xz | |
drm/amd/amdgpu: Correct VRAM width for APUs with GMC9
DDR4 has a 64-bit width not 128-bits. It was reporting
twice the width. Tested with my Ryzen 2400G.
Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c index bc4bd5e7ac94..4dd469188e2b 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c @@ -722,7 +722,10 @@ static int gmc_v9_0_mc_init(struct amdgpu_device *adev) adev->gmc.vram_width = amdgpu_atomfirmware_get_vram_width(adev); if (!adev->gmc.vram_width) { /* hbm memory channel size */ - chansize = 128; + if (adev->flags & AMD_IS_APU) + chansize = 64; + else + chansize = 128; tmp = RREG32_SOC15(DF, 0, mmDF_CS_AON0_DramBaseAddress0); tmp &= DF_CS_AON0_DramBaseAddress0__IntLvNumChan_MASK; |