drm/amd/powerplay: helper interfaces for MGPU fan boost feature

MGPU fan boost feature is enabled only when two or more dGPUs
in the system.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1833,6 +1833,43 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
 	return 0;
 }
 
+static int amdgpu_device_enable_mgpu_fan_boost(void)
+{
+	struct amdgpu_gpu_instance *gpu_ins;
+	struct amdgpu_device *adev;
+	int i, ret = 0;
+
+	mutex_lock(&mgpu_info.mutex);
+
+	/*
+	 * MGPU fan boost feature should be enabled
+	 * only when there are two or more dGPUs in
+	 * the system
+	 */
+	if (mgpu_info.num_dgpu < 2)
+		goto out;
+
+	for (i = 0; i < mgpu_info.num_dgpu; i++) {
+		gpu_ins = &(mgpu_info.gpu_ins[i]);
+		adev = gpu_ins->adev;
+		if (!(adev->flags & AMD_IS_APU) &&
+		    !gpu_ins->mgpu_fan_enabled &&
+		    adev->powerplay.pp_funcs &&
+		    adev->powerplay.pp_funcs->enable_mgpu_fan_boost) {
+			ret = amdgpu_dpm_enable_mgpu_fan_boost(adev);
+			if (ret)
+				break;
+
+			gpu_ins->mgpu_fan_enabled = 1;
+		}
+	}
+
+out:
+	mutex_unlock(&mgpu_info.mutex);
+
+	return ret;
+}
+
 /**
  * amdgpu_device_ip_late_init_func_handler - work handler for ib test
  *
@@ -1847,6 +1884,10 @@ static void amdgpu_device_ip_late_init_func_handler(struct work_struct *work)
 	r = amdgpu_ib_ring_tests(adev);
 	if (r)
 		DRM_ERROR("ib ring test failed (%d).\n", r);
+
+	r = amdgpu_device_enable_mgpu_fan_boost();
+	if (r)
+		DRM_ERROR("enable mgpu fan boost failed (%d).\n", r);
 }
 
 static void amdgpu_device_delay_enable_gfx_off(struct work_struct *work)

drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h

@@ -357,6 +357,10 @@ enum amdgpu_pcie_gen {
 		((adev)->powerplay.pp_funcs->odn_edit_dpm_table(\
 			(adev)->powerplay.pp_handle, type, parameter, size))
 
+#define amdgpu_dpm_enable_mgpu_fan_boost(adev) \
+		((adev)->powerplay.pp_funcs->enable_mgpu_fan_boost(\
+			(adev)->powerplay.pp_handle))
+
 struct amdgpu_dpm {
 	struct amdgpu_ps        *ps;
 	/* number of valid power states */

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

@@ -272,6 +272,7 @@ struct amd_pm_funcs {
 	int (*get_display_mode_validation_clocks)(void *handle,
 		struct amd_pp_simple_clock_info *clocks);
 	int (*notify_smu_enable_pwe)(void *handle);
+	int (*enable_mgpu_fan_boost)(void *handle);
 };
 
 #endif

drivers/gpu/drm/amd/powerplay/amd_powerplay.c

@@ -1243,6 +1243,24 @@ static int pp_notify_smu_enable_pwe(void *handle)
 	return 0;
 }
 
+static int pp_enable_mgpu_fan_boost(void *handle)
+{
+	struct pp_hwmgr *hwmgr = handle;
+
+	if (!hwmgr || !hwmgr->pm_en)
+		return -EINVAL;
+
+	if (hwmgr->hwmgr_func->enable_mgpu_fan_boost == NULL) {
+		return 0;
+	}
+
+	mutex_lock(&hwmgr->smu_lock);
+	hwmgr->hwmgr_func->enable_mgpu_fan_boost(hwmgr);
+	mutex_unlock(&hwmgr->smu_lock);
+
+	return 0;
+}
+
 static const struct amd_pm_funcs pp_dpm_funcs = {
 	.load_firmware = pp_dpm_load_fw,
 	.wait_for_fw_loading_complete = pp_dpm_fw_loading_complete,
@@ -1287,4 +1305,5 @@ static const struct amd_pm_funcs pp_dpm_funcs = {
 	.display_clock_voltage_request = pp_display_clock_voltage_request,
 	.get_display_mode_validation_clocks = pp_get_display_mode_validation_clocks,
 	.notify_smu_enable_pwe = pp_notify_smu_enable_pwe,
+	.enable_mgpu_fan_boost = pp_enable_mgpu_fan_boost,
 };

drivers/gpu/drm/amd/powerplay/inc/hwmgr.h

@@ -328,6 +328,7 @@ struct pp_hwmgr_func {
 	int (*set_power_limit)(struct pp_hwmgr *hwmgr, uint32_t n);
 	int (*powergate_mmhub)(struct pp_hwmgr *hwmgr);
 	int (*smus_notify_pwe)(struct pp_hwmgr *hwmgr);
+	int (*enable_mgpu_fan_boost)(struct pp_hwmgr *hwmgr);
 };
 
 struct pp_table_func {