From: Eric Huang <JinHuiEric.Huang@amd.com>
Date: Tue, 6 Feb 2018 14:38:38 -0500
Subject: drm/amd/powerplay: add mmhub powergating by smu in powerplay
Git-commit: 72d7619106075232816e87e27791934ae9b7c445
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

new generic interface is added in powerplay.

Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/powerplay/amd_powerplay.c |   22 ++++++++++++++++++++++
 drivers/gpu/drm/amd/powerplay/inc/hwmgr.h     |    1 +
 2 files changed, 23 insertions(+)

--- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
+++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
@@ -1475,6 +1475,27 @@ static int pp_get_display_mode_validatio
 	return ret;
 }
 
+static int pp_set_mmhub_powergating_by_smu(void *handle)
+{
+	struct pp_hwmgr *hwmgr;
+	struct pp_instance *pp_handle = (struct pp_instance *)handle;
+	int ret = 0;
+
+	ret = pp_check(pp_handle);
+
+	if (ret)
+		return ret;
+
+	hwmgr = pp_handle->hwmgr;
+
+	if (hwmgr->hwmgr_func->set_mmhub_powergating_by_smu == NULL) {
+		pr_info("%s was not implemented.\n", __func__);
+		return 0;
+	}
+
+	return hwmgr->hwmgr_func->set_mmhub_powergating_by_smu(hwmgr);
+}
+
 const struct amd_pm_funcs pp_dpm_funcs = {
 	.load_firmware = pp_dpm_load_fw,
 	.wait_for_fw_loading_complete = pp_dpm_fw_loading_complete,
@@ -1521,4 +1542,5 @@ const struct amd_pm_funcs pp_dpm_funcs =
 	.set_watermarks_for_clocks_ranges = pp_set_watermarks_for_clocks_ranges,
 	.display_clock_voltage_request = pp_display_clock_voltage_request,
 	.get_display_mode_validation_clocks = pp_get_display_mode_validation_clocks,
+	.set_mmhub_powergating_by_smu = pp_set_mmhub_powergating_by_smu,
 };
--- a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
@@ -347,6 +347,7 @@ struct pp_hwmgr_func {
 	int (*odn_edit_dpm_table)(struct pp_hwmgr *hwmgr,
 					enum PP_OD_DPM_TABLE_COMMAND type,
 					long *input, uint32_t size);
+	int (*set_mmhub_powergating_by_smu)(struct pp_hwmgr *hwmgr);
 };
 
 struct pp_table_func {