ath9k: disable PA predistortion by default, since it has been reported to reduce rx sensitivity on some devices (#12135)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33332 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 72 insertions, 0 deletions

diff --git a/package/mac80211/patches/565-ath9k_disable_paprd.patch b/package/mac80211/patches/565-ath9k_disable_paprd.patch
new file mode 100644
index 000000000..079986d60
--- /dev/null
+++ b/package/mac80211/patches/565-ath9k_disable_paprd.patch
@@ -0,0 +1,72 @@
+--- a/drivers/net/wireless/ath/ath9k/debug.c
++++ b/drivers/net/wireless/ath/ath9k/debug.c
+@@ -1767,6 +1767,8 @@ int ath9k_init_debug(struct ath_hw *ah)
+ 			    sc->debug.debugfs_phy, sc, &fops_tx_chainmask);
+ 	debugfs_create_file("disable_ani", S_IRUSR | S_IWUSR,
+ 			    sc->debug.debugfs_phy, sc, &fops_disable_ani);
++	debugfs_create_bool("paprd", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
++			    &sc->sc_ah->config.enable_paprd);
+ 	debugfs_create_file("regidx", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
+ 			    sc, &fops_regidx);
+ 	debugfs_create_file("regval", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -2521,10 +2521,6 @@ int ath9k_hw_fill_cap_info(struct ath_hw
+ 		pCap->rx_status_len = sizeof(struct ar9003_rxs);
+ 		pCap->tx_desc_len = sizeof(struct ar9003_txc);
+ 		pCap->txs_len = sizeof(struct ar9003_txs);
+-		if (!ah->config.paprd_disable &&
+-		    ah->eep_ops->get_eeprom(ah, EEP_PAPRD) &&
+-		    !AR_SREV_9462(ah))
+-			pCap->hw_caps |= ATH9K_HW_CAP_PAPRD;
+ 	} else {
+ 		pCap->tx_desc_len = sizeof(struct ath_desc);
+ 		if (AR_SREV_9280_20(ah))
+--- a/drivers/net/wireless/ath/ath9k/hw.h
++++ b/drivers/net/wireless/ath/ath9k/hw.h
+@@ -236,7 +236,6 @@ enum ath9k_hw_caps {
+ 	ATH9K_HW_CAP_LDPC			= BIT(6),
+ 	ATH9K_HW_CAP_FASTCLOCK			= BIT(7),
+ 	ATH9K_HW_CAP_SGI_20			= BIT(8),
+-	ATH9K_HW_CAP_PAPRD			= BIT(9),
+ 	ATH9K_HW_CAP_ANT_DIV_COMB		= BIT(10),
+ 	ATH9K_HW_CAP_2GHZ			= BIT(11),
+ 	ATH9K_HW_CAP_5GHZ			= BIT(12),
+@@ -287,12 +286,12 @@ struct ath9k_ops_config {
+ 	u8 pcie_clock_req;
+ 	u32 pcie_waen;
+ 	u8 analog_shiftreg;
+-	u8 paprd_disable;
+ 	u32 ofdm_trig_low;
+ 	u32 ofdm_trig_high;
+ 	u32 cck_trig_high;
+ 	u32 cck_trig_low;
+ 	u32 enable_ani;
++	u32 enable_paprd;
+ 	int serialize_regmode;
+ 	bool rx_intr_mitigation;
+ 	bool tx_intr_mitigation;
+--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
++++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+@@ -2982,6 +2982,10 @@ static u32 ath9k_hw_ar9300_get_eeprom(st
+ 	case EEP_RX_MASK:
+ 		return pBase->txrxMask & 0xf;
+ 	case EEP_PAPRD:
++		if (AR_SREV_9462(ah))
++			return false;
++		if (!ah->config.enable_paprd);
++			return false;
+ 		return !!(pBase->featureEnable & BIT(5));
+ 	case EEP_CHAIN_MASK_REDUCE:
+ 		return (pBase->miscConfiguration >> 0x3) & 0x1;
+--- a/drivers/net/wireless/ath/ath9k/link.c
++++ b/drivers/net/wireless/ath/ath9k/link.c
+@@ -423,7 +423,7 @@ set_timer:
+ 		cal_interval = min(cal_interval, (u32)short_cal_interval);
+ 
+ 	mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
+-	if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
++	if (ah->eep_ops->get_eeprom(ah, EEP_PAPRD) && ah->caldata) {
+ 		if (!ah->caldata->paprd_done)
+ 			ieee80211_queue_work(sc->hw, &sc->paprd_work);
+ 		else if (!ah->paprd_table_write_done)