recipes-wifi/linux-mt76/files/patches-3.x/0055-mtk-wifi-mt76-mt7996-add-fallback-in-case-of-missing.patch

From 2f7296b87ad9175b6761aa3db3d88a8f67d45fe7 Mon Sep 17 00:00:00 2001
From: StanleyYP Wang <StanleyYP.Wang@mediatek.com>
Date: Tue, 19 Mar 2024 17:33:49 +0800
Subject: [PATCH 055/116] mtk: wifi: mt76: mt7996: add fallback in case of
 missing precal data

Align Wi-Fi 6 upstream changes
https://github.com/openwrt/mt76/commit/2135e201e7a9339e018d4e2d4a33c73266e674d7

CR-Id: WCNCR00274293
Signed-off-by: StanleyYP Wang <StanleyYP.Wang@mediatek.com>
---
 mt7996/eeprom.c | 30 +++++++++++++++++++++---------
 mt7996/init.c   |  2 +-
 mt7996/main.c   |  2 +-
 3 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/mt7996/eeprom.c b/mt7996/eeprom.c
index 5eb862914..9987bdab2 100644
--- a/mt7996/eeprom.c
+++ b/mt7996/eeprom.c
@@ -487,17 +487,31 @@ static int mt7996_eeprom_load_precal(struct mt7996_dev *dev)
 	size = MT_EE_CAL_GROUP_SIZE + MT_EE_CAL_DPD_SIZE;
 
 	dev->cal = devm_kzalloc(mdev->dev, size, GFP_KERNEL);
-	if (!dev->cal)
-		return -ENOMEM;
+	if (!dev->cal) {
+		ret = -ENOMEM;
+		goto fail;
+	}
 
-	if (dev->bin_file_mode)
-		return mt7996_eeprom_load_precal_binfile(dev, MT_EE_PRECAL, size);
+	if (dev->bin_file_mode) {
+		ret = mt7996_eeprom_load_precal_binfile(dev, MT_EE_PRECAL, size);
+		if (ret)
+			goto fail;
+	}
 
 	ret = mt76_get_of_data_from_mtd(mdev, dev->cal, offs, size);
 	if (!ret)
-		return ret;
+		return 0;
+
+	ret = mt76_get_of_data_from_nvmem(mdev, dev->cal, "precal", size);
+	if (!ret)
+		return 0;
+
+fail:
+	dev_warn(dev->mt76.dev, "Failed to load precal data: %d\n", ret);
+	devm_kfree(dev->mt76.dev, dev->cal);
+	dev->cal = NULL;
 
-	return mt76_get_of_data_from_nvmem(mdev, dev->cal, "precal", size);
+	return ret;
 }
 
 static int mt7996_apply_cal_free_data(struct mt7996_dev *dev)
@@ -652,9 +666,7 @@ int mt7996_eeprom_init(struct mt7996_dev *dev)
 	if (ret)
 		return ret;
 
-	ret = mt7996_eeprom_load_precal(dev);
-	if (ret)
-		return ret;
+	mt7996_eeprom_load_precal(dev);
 
 	ret = mt7996_apply_cal_free_data(dev);
 	if (ret)
diff --git a/mt7996/init.c b/mt7996/init.c
index 6430bfa46..c10f6675d 100644
--- a/mt7996/init.c
+++ b/mt7996/init.c
@@ -1010,7 +1010,7 @@ static int mt7996_init_hardware(struct mt7996_dev *dev)
 	if (ret < 0)
 		return ret;
 
-	if (dev->flash_mode) {
+	if (dev->cal) {
 		ret = mt7996_mcu_apply_group_cal(dev);
 		if (ret)
 			return ret;
diff --git a/mt7996/main.c b/mt7996/main.c
index 2f1dd0fb7..aef08a882 100644
--- a/mt7996/main.c
+++ b/mt7996/main.c
@@ -345,7 +345,7 @@ int mt7996_set_channel(struct mt7996_phy *phy)
 
 	mt76_set_channel(phy->mt76);
 
-	if (dev->flash_mode) {
+	if (dev->cal) {
 		ret = mt7996_mcu_apply_tx_dpd(phy);
 		if (ret)
 			goto out;
-- 
2.39.2