ath11k: set correct NL80211_FEATURE_DYNAMIC_SMPS for WCN6855

Commit 6f4d7030 ("ath11k: support SMPS configuration for 6 GHz") changed
"if (ht_cap & WMI_HT_CAP_DYNAMIC_SMPS)" to "if (ht_cap &
WMI_HT_CAP_DYNAMIC_SMPS || ar->supports_6ghz)" which means
NL80211_FEATURE_DYNAMIC_SMPS is enabled for all chips which support 6 GHz.
However, WCN6855 supports 6 GHz but it does not support feature
NL80211_FEATURE_DYNAMIC_SMPS, and this can lead to MU-MIMO test failures for
WCN6855.

Disable NL80211_FEATURE_DYNAMIC_SMPS for WCN6855 since its ht_cap does not
support WMI_HT_CAP_DYNAMIC_SMPS. Enable the feature only on QCN9074 as that's
the only other device supporting 6 GHz band.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1
Signed-off-by: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210914163726.38604-3-jouni@codeaurora.org

drivers/net/wireless/ath/ath11k/core.c

@@ -82,6 +82,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.fix_l1ss = true,
 		.max_tx_ring = DP_TCL_NUM_RING_MAX,
 		.hal_params = &ath11k_hw_hal_params_ipq8074,
+		.supports_dynamic_smps_6ghz = false,
 	},
 	{
 		.hw_rev = ATH11K_HW_IPQ6018_HW10,
@@ -131,6 +132,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.fix_l1ss = true,
 		.max_tx_ring = DP_TCL_NUM_RING_MAX,
 		.hal_params = &ath11k_hw_hal_params_ipq8074,
+		.supports_dynamic_smps_6ghz = false,
 	},
 	{
 		.name = "qca6390 hw2.0",
@@ -179,6 +181,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.fix_l1ss = true,
 		.max_tx_ring = DP_TCL_NUM_RING_MAX_QCA6390,
 		.hal_params = &ath11k_hw_hal_params_qca6390,
+		.supports_dynamic_smps_6ghz = false,
 	},
 	{
 		.name = "qcn9074 hw1.0",
@@ -227,6 +230,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.fix_l1ss = true,
 		.max_tx_ring = DP_TCL_NUM_RING_MAX,
 		.hal_params = &ath11k_hw_hal_params_ipq8074,
+		.supports_dynamic_smps_6ghz = true,
 	},
 	{
 		.name = "wcn6855 hw2.0",
@@ -275,6 +279,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.fix_l1ss = false,
 		.max_tx_ring = DP_TCL_NUM_RING_MAX_QCA6390,
 		.hal_params = &ath11k_hw_hal_params_qca6390,
+		.supports_dynamic_smps_6ghz = false,
 	},
 };
 

drivers/net/wireless/ath/ath11k/hw.h

@@ -176,6 +176,7 @@ struct ath11k_hw_params {
 	bool fix_l1ss;
 	u8 max_tx_ring;
 	const struct ath11k_hw_hal_params *hal_params;
+	bool supports_dynamic_smps_6ghz;
 };
 
 struct ath11k_hw_ops {

drivers/net/wireless/ath/ath11k/mac.c

@@ -7672,7 +7672,8 @@ static int __ath11k_mac_register(struct ath11k *ar)
 	 * for each band for a dual band capable radio. It will be tricky to
 	 * handle it when the ht capability different for each band.
 	 */
-	if (ht_cap & WMI_HT_CAP_DYNAMIC_SMPS || ar->supports_6ghz)
+	if (ht_cap & WMI_HT_CAP_DYNAMIC_SMPS ||
+	    (ar->supports_6ghz && ab->hw_params.supports_dynamic_smps_6ghz))
 		ar->hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS;
 
 	ar->hw->wiphy->max_scan_ssids = WLAN_SCAN_PARAMS_MAX_SSID;