drm/amdgpu/gmc10: program the smallK fragment size

Explicitly set the smallk size to 0 (4k).  This is the hw
default, but set it anyway just in case something else
changed it.
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c

@@ -181,6 +181,10 @@ static void gfxhub_v2_0_init_cache_regs(struct amdgpu_device *adev)
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL4, VMC_TAP_PDE_REQUEST_PHYSICAL, 0);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL4, VMC_TAP_PTE_REQUEST_PHYSICAL, 0);
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL4, tmp);
+
+	tmp = mmGCVM_L2_CNTL5_DEFAULT;
+	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL5, L2_CACHE_SMALLK_FRAGMENT_SIZE, 0);
+	WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL5, tmp);
 }
 
 static void gfxhub_v2_0_enable_system_domain(struct amdgpu_device *adev)

drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c

@@ -164,6 +164,10 @@ static void mmhub_v2_0_init_cache_regs(struct amdgpu_device *adev)
 	tmp = REG_SET_FIELD(tmp, MMVM_L2_CNTL4, VMC_TAP_PDE_REQUEST_PHYSICAL, 0);
 	tmp = REG_SET_FIELD(tmp, MMVM_L2_CNTL4, VMC_TAP_PTE_REQUEST_PHYSICAL, 0);
 	WREG32_SOC15(MMHUB, 0, mmMMVM_L2_CNTL4, tmp);
+
+	tmp = mmMMVM_L2_CNTL5_DEFAULT;
+	tmp = REG_SET_FIELD(tmp, MMVM_L2_CNTL5, L2_CACHE_SMALLK_FRAGMENT_SIZE, 0);
+	WREG32_SOC15(GC, 0, mmMMVM_L2_CNTL5, tmp);
 }
 
 static void mmhub_v2_0_enable_system_domain(struct amdgpu_device *adev)