drm/amdgpu: add get clockgating_state method for gmc v8

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
index 476bc9f..684a5f3 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -1439,6 +1439,21 @@ static int gmc_v8_0_set_powergating_state(void *handle,
        return 0;
 }
 
+static void gmc_v8_0_get_clockgating_state(void *handle, u32 *flags)
+{
+       struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+       int data;
+
+       /* AMD_CG_SUPPORT_MC_MGCG */
+       data = RREG32(mmMC_HUB_MISC_HUB_CG);
+       if (data & MC_HUB_MISC_HUB_CG__ENABLE_MASK)
+               *flags |= AMD_CG_SUPPORT_MC_MGCG;
+
+       /* AMD_CG_SUPPORT_MC_LS */
+       if (data & MC_HUB_MISC_HUB_CG__MEM_LS_ENABLE_MASK)
+               *flags |= AMD_CG_SUPPORT_MC_LS;
+}
+
 static const struct amd_ip_funcs gmc_v8_0_ip_funcs = {
        .name = "gmc_v8_0",
        .early_init = gmc_v8_0_early_init,
@@ -1457,6 +1472,7 @@ static const struct amd_ip_funcs gmc_v8_0_ip_funcs = {
        .post_soft_reset = gmc_v8_0_post_soft_reset,
        .set_clockgating_state = gmc_v8_0_set_clockgating_state,
        .set_powergating_state = gmc_v8_0_set_powergating_state,
+       .get_clockgating_state = gmc_v8_0_get_clockgating_state,
 };
 
 static const struct amdgpu_gart_funcs gmc_v8_0_gart_funcs = {