Commit 9081c4cf authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu/gmc8: use the vram location programmed by the vbios 



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: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 84b5d3d1

drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c

+4 −1
Original line number Diff line number Diff line
@@ -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);

}

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