drm/amdgpu: add get clockgating_state method for sdma v3

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>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
index 034ace79ed49..4bb8bec13c47 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
@@ -1533,6 +1533,22 @@ static int sdma_v3_0_set_powergating_state(void *handle,
         return 0;
 }
 
+static void sdma_v3_0_get_clockgating_state(void *handle, u32 *flags)
+{
+        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+        int data;
+
+        /* AMD_CG_SUPPORT_SDMA_MGCG */
+        data = RREG32(mmSDMA0_CLK_CTRL + sdma_offsets[0]);
+        if (!(data & SDMA0_CLK_CTRL__SOFT_OVERRIDE0_MASK))
+                *flags |= AMD_CG_SUPPORT_SDMA_MGCG;
+
+        /* AMD_CG_SUPPORT_SDMA_LS */
+        data = RREG32(mmSDMA0_POWER_CNTL + sdma_offsets[0]);
+        if (data & SDMA0_POWER_CNTL__MEM_POWER_OVERRIDE_MASK)
+                *flags |= AMD_CG_SUPPORT_SDMA_LS;
+}
+
 static const struct amd_ip_funcs sdma_v3_0_ip_funcs = {
         .name = "sdma_v3_0",
         .early_init = sdma_v3_0_early_init,
@@ -1551,6 +1567,7 @@ static const struct amd_ip_funcs sdma_v3_0_ip_funcs = {
         .soft_reset = sdma_v3_0_soft_reset,
         .set_clockgating_state = sdma_v3_0_set_clockgating_state,
         .set_powergating_state = sdma_v3_0_set_powergating_state,
+        .get_clockgating_state = sdma_v3_0_get_clockgating_state,
 };
 
 static const struct amdgpu_ring_funcs sdma_v3_0_ring_funcs = {