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Subject[PATCH] mt76: mt7615: add support for per-chain signal strength reporting
Date
Fill in RX status->chain_signal to avoid empty value.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
---
.../net/wireless/mediatek/mt76/mt7615/mac.c | 30 ++++++++++++++++++-
.../net/wireless/mediatek/mt76/mt7615/mac.h | 5 ++++
2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
index b60d42b5923d..9ee83ea11b8c
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
@@ -13,6 +13,11 @@
#include "../dma.h"
#include "mac.h"

+static inline s8 to_rssi(u32 field, u32 rxv)
+{
+ return (FIELD_GET(field, rxv) - 220) / 2;
+}
+
static struct mt76_wcid *mt7615_rx_get_wcid(struct mt7615_dev *dev,
u8 idx, bool unicast)
{
@@ -120,6 +125,7 @@ int mt7615_mac_fill_rx(struct mt7615_dev *dev, struct sk_buff *skb)
if (rxd0 & MT_RXD0_NORMAL_GROUP_3) {
u32 rxdg0 = le32_to_cpu(rxd[0]);
u32 rxdg1 = le32_to_cpu(rxd[1]);
+ u32 rxdg3 = le32_to_cpu(rxd[3]);
u8 stbc = FIELD_GET(MT_RXV1_HT_STBC, rxdg0);
bool cck = false;

@@ -169,7 +175,29 @@ int mt7615_mac_fill_rx(struct mt7615_dev *dev, struct sk_buff *skb)

status->enc_flags |= RX_ENC_FLAG_STBC_MASK * stbc;

- /* TODO: RSSI */
+ status->chains = dev->mt76.antenna_mask;
+ status->chain_signal[0] = to_rssi(MT_RXV4_RCPI0, rxdg3);
+ status->signal = status->chain_signal[0];
+
+ switch (status->chains) {
+ case 0x3:
+ status->chain_signal[1] = to_rssi(MT_RXV4_RCPI1, rxdg3);
+ status->signal = max(status->signal,
+ status->chain_signal[1]);
+ break;
+ case 0x7:
+ status->chain_signal[2] = to_rssi(MT_RXV4_RCPI2, rxdg3);
+ status->signal = max(status->signal,
+ status->chain_signal[2]);
+ break;
+ case 0xf:
+ status->chain_signal[3] = to_rssi(MT_RXV4_RCPI3, rxdg3);
+ status->signal = max(status->signal,
+ status->chain_signal[3]);
+ break;
+ default:
+ break;
+ }
rxd += 6;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.h b/drivers/net/wireless/mediatek/mt76/mt7615/mac.h
index 18ad4b8a3807..b00ce8db58e9
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.h
@@ -98,6 +98,11 @@ enum rx_pkt_type {
#define MT_RXV2_GROUP_ID GENMASK(26, 21)
#define MT_RXV2_LENGTH GENMASK(20, 0)

+#define MT_RXV4_RCPI3 GENMASK(31, 24)
+#define MT_RXV4_RCPI2 GENMASK(23, 16)
+#define MT_RXV4_RCPI1 GENMASK(15, 8)
+#define MT_RXV4_RCPI0 GENMASK(7, 0)
+
enum tx_header_format {
MT_HDR_FORMAT_802_3,
MT_HDR_FORMAT_CMD,
--
2.18.0
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