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path: root/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
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Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
index 492ebed2915b..63b890f1e8af 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -515,10 +515,10 @@ static void gmc_v8_0_mc_program(struct amdgpu_device *adev)
static int gmc_v8_0_mc_init(struct amdgpu_device *adev)
{
int r;
+ u32 tmp;
adev->gmc.vram_width = amdgpu_atombios_get_vram_width(adev);
if (!adev->gmc.vram_width) {
- u32 tmp;
int chansize, numchan;
/* Get VRAM informations */
@@ -562,8 +562,15 @@ static int gmc_v8_0_mc_init(struct amdgpu_device *adev)
adev->gmc.vram_width = numchan * chansize;
}
/* size in MB on si */
- adev->gmc.mc_vram_size = RREG32(mmCONFIG_MEMSIZE) * 1024ULL * 1024ULL;
- adev->gmc.real_vram_size = RREG32(mmCONFIG_MEMSIZE) * 1024ULL * 1024ULL;
+ tmp = RREG32(mmCONFIG_MEMSIZE);
+ /* some boards may have garbage in the upper 16 bits */
+ if (tmp & 0xffff0000) {
+ DRM_INFO("Probable bad vram size: 0x%08x\n", tmp);
+ if (tmp & 0xffff)
+ tmp &= 0xffff;
+ }
+ adev->gmc.mc_vram_size = tmp * 1024ULL * 1024ULL;
+ adev->gmc.real_vram_size = adev->gmc.mc_vram_size;
if (!(adev->flags & AMD_IS_APU)) {
r = amdgpu_device_resize_fb_bar(adev);