[PATCH 3/4] drm/amd/powerplay: avoid repeat AVFS enablement/disablement

[Evan Quan]

No need to enable or disable AVFS if it's already in wanted
state.

Change-Id: I862c0c3d642e6a0dc7bb34e04c5a59f17b6b8deb
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
index 103f7e3f0783..f4b81f50b185 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
@@ -2364,6 +2364,10 @@ static int vega10_avfs_enable(struct pp_hwmgr *hwmgr, bool enable)
 	struct vega10_hwmgr *data = hwmgr->backend;
 
 	if (data->smu_features[GNLD_AVFS].supported) {
+		/* Already enabled or disabled */
+		if (!(enable ^ data->smu_features[GNLD_AVFS].enabled))
+			return 0;
+
 		if (enable) {
 			PP_ASSERT_WITH_CODE(!vega10_enable_smc_features(hwmgr,
 					true,
-- 
2.21.0