drm/amdgpu: add an cgs interface to notify amdgpu the dpm state.

Signed-off-by: NRex Zhu <Rex.Zhu@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -850,6 +850,16 @@ static int amdgpu_cgs_get_active_displays_info(void *cgs_device,
 	return 0;
 }
 
+
+static int amdgpu_cgs_notify_dpm_enabled(void *cgs_device, bool enabled)
+{
+	CGS_FUNC_ADEV;
+
+	adev->pm.dpm_enabled = enabled;
+
+	return 0;
+}
+
 /** \brief evaluate acpi namespace object, handle or pathname must be valid
  *  \param cgs_device
  *  \param info input/output arguments for the control method
@@ -1100,6 +1110,7 @@ static const struct cgs_ops amdgpu_cgs_ops = {
 	amdgpu_cgs_set_powergating_state,
 	amdgpu_cgs_set_clockgating_state,
 	amdgpu_cgs_get_active_displays_info,
+	amdgpu_cgs_notify_dpm_enabled,
 	amdgpu_cgs_call_acpi_method,
 	amdgpu_cgs_query_system_info,
 };

drivers/gpu/drm/amd/include/cgs_common.h

@@ -589,6 +589,8 @@ typedef int(*cgs_get_active_displays_info)(
 					void *cgs_device,
 					struct cgs_display_info *info);
 
+typedef int (*cgs_notify_dpm_enabled)(void *cgs_device, bool enabled);
+
 typedef int (*cgs_call_acpi_method)(void *cgs_device,
 					uint32_t acpi_method,
 					uint32_t acpi_function,
@@ -644,6 +646,8 @@ struct cgs_ops {
 	cgs_set_clockgating_state set_clockgating_state;
 	/* display manager */
 	cgs_get_active_displays_info get_active_displays_info;
+	/* notify dpm enabled */
+	cgs_notify_dpm_enabled notify_dpm_enabled;
 	/* ACPI */
 	cgs_call_acpi_method call_acpi_method;
 	/* get system info */
@@ -734,8 +738,12 @@ struct cgs_device
 	CGS_CALL(set_powergating_state, dev, block_type, state)
 #define cgs_set_clockgating_state(dev, block_type, state)	\
 	CGS_CALL(set_clockgating_state, dev, block_type, state)
+#define cgs_notify_dpm_enabled(dev, enabled)	\
+	CGS_CALL(notify_dpm_enabled, dev, enabled)
+
 #define cgs_get_active_displays_info(dev, info)	\
 	CGS_CALL(get_active_displays_info, dev, info)
+
 #define cgs_call_acpi_method(dev, acpi_method, acpi_function, pintput, poutput, output_count, input_size, output_size)	\
 	CGS_CALL(call_acpi_method, dev, acpi_method, acpi_function, pintput, poutput, output_count, input_size, output_size)
 #define cgs_query_system_info(dev, sys_info)	\