[PATCH 4/6] drm/amdgpu: add get_clockgating for sdma v4

[Huang Rui <ray.huang-5C7GfCeVMHo@public.gmane.org>]

Signed-off-by: Huang Rui <ray.huang@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 7347326..df4b1d3 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -1389,6 +1389,22 @@ static int sdma_v4_0_set_powergating_state(void *handle,
 	return 0;
 }
 
+static void sdma_v4_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(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CLK_CTRL));
+	if (!(data & SDMA0_CLK_CTRL__SOFT_OVERRIDE7_MASK))
+		*flags |= AMD_CG_SUPPORT_SDMA_MGCG;
+
+	/* AMD_CG_SUPPORT_SDMA_LS */
+	data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_POWER_CNTL));
+	if (data & SDMA0_POWER_CNTL__MEM_POWER_OVERRIDE_MASK)
+		*flags |= AMD_CG_SUPPORT_SDMA_LS;
+}
+
 const struct amd_ip_funcs sdma_v4_0_ip_funcs = {
 	.name = "sdma_v4_0",
 	.early_init = sdma_v4_0_early_init,
@@ -1404,6 +1420,7 @@ const struct amd_ip_funcs sdma_v4_0_ip_funcs = {
 	.soft_reset = sdma_v4_0_soft_reset,
 	.set_clockgating_state = sdma_v4_0_set_clockgating_state,
 	.set_powergating_state = sdma_v4_0_set_powergating_state,
+	.get_clockgating_state = sdma_v4_0_get_clockgating_state,
 };
 
 static const struct amdgpu_ring_funcs sdma_v4_0_ring_funcs = {
-- 
2.7.4

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