drm/amd/powerplay: drop unnecessary pp_funcs checker

It's redundant. Also, the callers should not care about
the implementation details.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Nirmoy Das <nirmoy.das@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -136,9 +136,7 @@ static int acp_poweroff(struct generic_pm_domain *genpd)
 	 * 2. power off the acp tiles
 	 * 3. check and enter ulv state
 	 */
-		if (adev->powerplay.pp_funcs &&
-			adev->powerplay.pp_funcs->set_powergating_by_smu)
-			amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, true);
+		amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, true);
 	}
 	return 0;
 }
@@ -157,8 +155,7 @@ static int acp_poweron(struct generic_pm_domain *genpd)
 	 * 2. turn on acp clock
 	 * 3. power on acp tiles
 	 */
-		if (adev->powerplay.pp_funcs->set_powergating_by_smu)
-			amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, false);
+		amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, false);
 	}
 	return 0;
 }
@@ -529,9 +526,7 @@ static int acp_set_powergating_state(void *handle,
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	bool enable = (state == AMD_PG_STATE_GATE);
 
-	if (adev->powerplay.pp_funcs &&
-		adev->powerplay.pp_funcs->set_powergating_by_smu)
-		amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, enable);
+	amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, enable);
 
 	return 0;
 }

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

@@ -5343,10 +5343,9 @@ static int gfx_v8_0_late_init(void *handle)
 static void gfx_v8_0_enable_gfx_static_mg_power_gating(struct amdgpu_device *adev,
 						       bool enable)
 {
-	if (((adev->asic_type == CHIP_POLARIS11) ||
+	if ((adev->asic_type == CHIP_POLARIS11) ||
 	    (adev->asic_type == CHIP_POLARIS12) ||
-	    (adev->asic_type == CHIP_VEGAM)) &&
-	    adev->powerplay.pp_funcs->set_powergating_by_smu)
+	    (adev->asic_type == CHIP_VEGAM))
 		/* Send msg to SMU via Powerplay */
 		amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, enable);
 

drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c

@@ -304,8 +304,7 @@ static void mmhub_v1_0_update_power_gating(struct amdgpu_device *adev,
 		return;
 
 	if (enable && adev->pg_flags & AMD_PG_SUPPORT_MMHUB) {
-		if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->set_powergating_by_smu)
-			amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GMC, true);
+		amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GMC, true);
 
 	}
 }