From 9081c4cf7d4ea40cf7e77e8efe3c2bedb924b830 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Tue, 1 Nov 2016 13:08:33 -0400 Subject: [PATCH] drm/amdgpu/gmc8: use the vram location programmed by the vbios MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This makes mc programming much simpler in future patches. Since evergreen, the vbios has been programming the fb location to the proper vram size. The only reason to reprogram it would be to change the location. Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c index cc9f880..1c8c0f5 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c @@ -404,13 +404,16 @@ static int gmc_v8_0_polaris_mc_load_microcode(struct amdgpu_device *adev) static void gmc_v8_0_vram_gtt_location(struct amdgpu_device *adev, struct amdgpu_mc *mc) { + u64 base = RREG32(mmMC_VM_FB_LOCATION) & 0xFFFF; + base <<= 24; + if (mc->mc_vram_size > 0xFFC0000000ULL) { /* leave room for at least 1024M GTT */ dev_warn(adev->dev, "limiting VRAM\n"); mc->real_vram_size = 0xFFC0000000ULL; mc->mc_vram_size = 0xFFC0000000ULL; } - amdgpu_vram_location(adev, &adev->mc, 0); + amdgpu_vram_location(adev, &adev->mc, base); adev->mc.gtt_base_align = 0; amdgpu_gtt_location(adev, mc); } -- 2.7.4