iwlwifi: add SM PS support for 6x50 series

Spatial Multiplexing Power Save was disabled to achieve better
throughput while in power save mode by activating all the rx chains all the time.
By doing so, the device power consumption is high.

Enable static/dynamic spatial multiplexing power save if device support
it, which can lower the power consumption without impact throughput.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
index ce1ceac19c7d..74cc8dbe9359 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -182,6 +182,11 @@ static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
                 goto done;
 
         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
+        IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
+                        (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
+                        "static" :
+                        (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
+                        "dynamic" : "disabled");
 
         sta_flags = priv->stations[index].sta.station_flags;