Commit 82d0ece9 authored by Tom St Denis's avatar Tom St Denis Committed by Alex Deucher

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: default avatarTom St Denis <tom.stdenis@amd.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent f812dec5
......@@ -682,6 +682,9 @@ static int gmc_v9_0_mc_init(struct amdgpu_device *adev)
adev->mc.vram_width = amdgpu_atomfirmware_get_vram_width(adev);
if (!adev->mc.vram_width) {
/* hbm memory channel size */
if (adev->flags & AMD_IS_APU)
chansize = 64;
else
chansize = 128;
tmp = RREG32_SOC15(DF, 0, mmDF_CS_AON0_DramBaseAddress0);
......
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