drm/amd/amdgpu: Correct VRAM width for APUs with GMC9

[linux-block.git] / drivers / gpu / drm / amd / amdgpu / gmc_v9_0.c

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 2719937e09d6bf00a4f78c47cd970ce5f5a51000..fd6370982c9a5f4f39672c27be6d3cb739668d01 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -682,7 +682,10 @@ 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 */
-               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;