drm/amdgpu: add get_clockgating callback for nbio v6.1

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index f0094a3..67f4a5a 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -49,6 +49,7 @@ static const struct cg_flag_name clocks[] = {
        {AMD_CG_SUPPORT_MC_MGCG, "Memory Controller Medium Grain Clock Gating"},
        {AMD_CG_SUPPORT_SDMA_LS, "System Direct Memory Access Light Sleep"},
        {AMD_CG_SUPPORT_SDMA_MGCG, "System Direct Memory Access Medium Grain Clock Gating"},
+       {AMD_CG_SUPPORT_BIF_MGCG, "Bus Interface Medium Grain Clock Gating"},
        {AMD_CG_SUPPORT_BIF_LS, "Bus Interface Light Sleep"},
        {AMD_CG_SUPPORT_UVD_MGCG, "Unified Video Decoder Medium Grain Clock Gating"},
        {AMD_CG_SUPPORT_VCE_MGCG, "Video Compression Engine Medium Grain Clock Gating"},

diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
index 9021872..97057f4 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
@@ -206,6 +206,21 @@ void nbio_v6_1_update_medium_grain_light_sleep(struct amdgpu_device *adev,
                WREG32_PCIE(smnPCIE_CNTL2, data);
 }
 
+void nbio_v6_1_get_clockgating_state(struct amdgpu_device *adev, u32 *flags)
+{
+       int data;
+
+       /* AMD_CG_SUPPORT_BIF_MGCG */
+       data = RREG32_PCIE(smnCPM_CONTROL);
+       if (data & CPM_CONTROL__LCLK_DYN_GATE_ENABLE_MASK)
+               *flags |= AMD_CG_SUPPORT_BIF_MGCG;
+
+       /* AMD_CG_SUPPORT_BIF_LS */
+       data = RREG32_PCIE(smnPCIE_CNTL2);
+       if (data & PCIE_CNTL2__SLV_MEM_LS_EN_MASK)
+               *flags |= AMD_CG_SUPPORT_BIF_LS;
+}
+
 struct nbio_hdp_flush_reg nbio_v6_1_hdp_flush_reg;
 struct nbio_pcie_index_data nbio_v6_1_pcie_index_data;
 

diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h
index 3e04093..f6f8bc0 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h
@@ -48,6 +48,7 @@ void nbio_v6_1_ih_control(struct amdgpu_device *adev);
 u32 nbio_v6_1_get_rev_id(struct amdgpu_device *adev);
 void nbio_v6_1_update_medium_grain_clock_gating(struct amdgpu_device *adev, bool enable);
 void nbio_v6_1_update_medium_grain_light_sleep(struct amdgpu_device *adev, bool enable);
+void nbio_v6_1_get_clockgating_state(struct amdgpu_device *adev, u32 *flags);
 void nbio_v6_1_detect_hw_virt(struct amdgpu_device *adev);
 
 #endif