From 461f3b0930b0fd9972a434289d7420519634294d Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Sun, 3 Mar 2019 19:40:36 +0100
Subject: [PATCH] mt76: mt76x02: disable ED/CCA by default

This feature has been reported to cause stability issues on several systems.
Disable it until it has been fixed and verified. It can still be enabled
through debugfs

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 mt76x02.h         |  1 +
 mt76x02_debugfs.c | 27 +++++++++++++++++++++++++++
 mt76x02_dfs.c     |  3 ++-
 3 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/mt76x02.h b/mt76x02.h
index 0f0fab54..5ed75d66 100644
--- a/mt76x02.h
+++ b/mt76x02.h
@@ -118,6 +118,7 @@ struct mt76x02_dev {
 	unsigned long ed_trigger_timeout;
 	bool ed_tx_blocked;
 	bool ed_monitor;
+	u8 ed_monitor_enabled;
 	u8 ed_monitor_learning;
 	u8 ed_trigger;
 	u8 ed_silent;
diff --git a/mt76x02_debugfs.c b/mt76x02_debugfs.c
index 7580c5c9..b1d6fd48 100644
--- a/mt76x02_debugfs.c
+++ b/mt76x02_debugfs.c
@@ -116,6 +116,32 @@ static int read_agc(struct seq_file *file, void *data)
 	return 0;
 }
 
+static int
+mt76_edcca_set(void *data, u64 val)
+{
+	struct mt76x02_dev *dev = data;
+	enum nl80211_dfs_regions region = dev->dfs_pd.region;
+
+	dev->ed_monitor_enabled = !!val;
+	dev->ed_monitor = dev->ed_monitor_enabled &&
+			  region == NL80211_DFS_ETSI;
+	mt76x02_edcca_init(dev, true);
+
+	return 0;
+}
+
+static int
+mt76_edcca_get(void *data, u64 *val)
+{
+	struct mt76x02_dev *dev = data;
+
+	*val = dev->ed_monitor_enabled;
+	return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(fops_edcca, mt76_edcca_get, mt76_edcca_set,
+			 "%lld\n");
+
 void mt76x02_init_debugfs(struct mt76x02_dev *dev)
 {
 	struct dentry *dir;
@@ -127,6 +153,7 @@ void mt76x02_init_debugfs(struct mt76x02_dev *dev)
 	debugfs_create_u8("temperature", 0400, dir, &dev->cal.temp);
 	debugfs_create_bool("tpc", 0600, dir, &dev->enable_tpc);
 
+	debugfs_create_file("edcca", 0400, dir, dev, &fops_edcca);
 	debugfs_create_file("ampdu_stat", 0400, dir, dev, &fops_ampdu_stat);
 	debugfs_create_file("dfs_stats", 0400, dir, dev, &fops_dfs_stat);
 	debugfs_create_devm_seqfile(dev->mt76.dev, "txpower", dir,
diff --git a/mt76x02_dfs.c b/mt76x02_dfs.c
index e4649103..17d12d21 100644
--- a/mt76x02_dfs.c
+++ b/mt76x02_dfs.c
@@ -885,7 +885,8 @@ mt76x02_dfs_set_domain(struct mt76x02_dev *dev,
 	if (dfs_pd->region != region) {
 		tasklet_disable(&dfs_pd->dfs_tasklet);
 
-		dev->ed_monitor = region == NL80211_DFS_ETSI;
+		dev->ed_monitor = dev->ed_monitor_enabled &&
+				  region == NL80211_DFS_ETSI;
 		mt76x02_edcca_init(dev, true);
 
 		dfs_pd->region = region;