[PATCH 14/17] mt76: mt7615: add runtime-pm knob in mt7615 debugfs

[Lorenzo Bianconi]

Introduce runtime-pm knob in mt7615 debugfs in order to enable/disable
runtime pm available in offload firmware

Signed-off-by: Lorenzo Bianconi <lorenzo at kernel.org>
---
 .../wireless/mediatek/mt76/mt7615/debugfs.c   | 24 +++++++++++++++++++
 .../net/wireless/mediatek/mt76/mt7615/mac.c   | 22 ++++++++++++++++-
 .../wireless/mediatek/mt76/mt7615/mt7615.h    |  3 +++
 3 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
index b4c196005ebf..357b3c2fc3f9 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
@@ -46,6 +46,29 @@ mt7615_scs_get(void *data, u64 *val)
 DEFINE_DEBUGFS_ATTRIBUTE(fops_scs, mt7615_scs_get,
 			 mt7615_scs_set, "%lld\n");
 
+static int
+mt7615_pm_set(void *data, u64 val)
+{
+	struct mt7615_dev *dev = data;
+
+	if (!mt7615_wait_for_mcu_init(dev))
+		return 0;
+
+	return mt7615_pm_set_enable(dev, val);
+}
+
+static int
+mt7615_pm_get(void *data, u64 *val)
+{
+	struct mt7615_dev *dev = data;
+
+	*val = dev->pm.enable;
+
+	return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(fops_pm, mt7615_pm_get, mt7615_pm_set, "%lld\n");
+
 static int
 mt7615_dbdc_set(void *data, u64 val)
 {
@@ -336,6 +359,7 @@ int mt7615_init_debugfs(struct mt7615_dev *dev)
 	debugfs_create_file("scs", 0600, dir, dev, &fops_scs);
 	debugfs_create_file("dbdc", 0600, dir, dev, &fops_dbdc);
 	debugfs_create_file("fw_debug", 0600, dir, dev, &fops_fw_debug);
+	debugfs_create_file("runtime-pm", 0600, dir, dev, &fops_pm);
 	debugfs_create_devm_seqfile(dev->mt76.dev, "radio", dir,
 				    mt7615_radio_read);
 	debugfs_create_u32("dfs_hw_pattern", 0400, dir, &dev->hw_pattern);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
index 8616bac97963..d3e3112359e8 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
@@ -1905,7 +1905,8 @@ void mt7615_pm_power_save_sched(struct mt7615_dev *dev)
 {
 	struct mt76_phy *mphy = dev->phy.mt76;
 
-	if (!mt7615_firmware_offload(dev) || !mt76_is_mmio(mphy->dev) ||
+	if (!mt7615_firmware_offload(dev) ||
+	    !dev->pm.enable || !mt76_is_mmio(mphy->dev) ||
 	    !test_bit(MT76_STATE_RUNNING, &mphy->state))
 		return;
 
@@ -1928,6 +1929,25 @@ void mt7615_pm_power_save_work(struct work_struct *work)
 				   MT7615_PM_TIMEOUT);
 }
 
+int mt7615_pm_set_enable(struct mt7615_dev *dev, bool enable)
+{
+	if (!mt7615_firmware_offload(dev) || !mt76_is_mmio(&dev->mt76))
+		return -EOPNOTSUPP;
+
+	mutex_lock(&dev->mt76.mutex);
+
+	if (dev->pm.enable == enable)
+		goto out;
+
+	dev->pm.enable = enable;
+	if (!enable)
+		cancel_delayed_work_sync(&dev->pm.ps_work);
+out:
+	mutex_unlock(&dev->mt76.mutex);
+
+	return 0;
+}
+
 void mt7615_mac_work(struct work_struct *work)
 {
 	struct mt7615_phy *phy;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
index 6da0af628c8d..02282b1a00b0 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
@@ -300,6 +300,8 @@ struct mt7615_dev {
 #endif
 
 	struct {
+		bool enable;
+
 		spinlock_t txq_lock;
 		struct {
 			struct mt7615_sta *msta;
@@ -441,6 +443,7 @@ bool mt7615_wait_for_mcu_init(struct mt7615_dev *dev);
 void mt7615_mac_set_rates(struct mt7615_phy *phy, struct mt7615_sta *sta,
 			  struct ieee80211_tx_rate *probe_rate,
 			  struct ieee80211_tx_rate *rates);
+int mt7615_pm_set_enable(struct mt7615_dev *dev, bool enable);
 void mt7615_pm_wake_work(struct work_struct *work);
 int mt7615_pm_wake(struct mt7615_dev *dev);
 void mt7615_pm_power_save_sched(struct mt7615_dev *dev);
-- 
2.26.2