Commit 108ec4da authored by Felix Fietkau's avatar Felix Fietkau Committed by Kalle Valo
Browse files

mt76: add a debugfs file to dump agc calibration information 



Useful for debugging gain adjustment issues triggered by signal strength
changes.

Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent 8e31f0d3

drivers/net/wireless/mediatek/mt76/mt76x2.h

+1 −0
Original line number Diff line number Diff line
@@ -72,6 +72,7 @@ struct mt76x2_calibration { 
	int avg_rssi[MT_MAX_CHAINS];

	int avg_rssi_all;



	u16 false_cca;

	s8 agc_gain_adjust;

	s8 low_gain;

drivers/net/wireless/mediatek/mt76/mt76x2_debugfs.c

+14 −0
Original line number Diff line number Diff line
@@ -115,6 +115,18 @@ static const struct file_operations fops_dfs_stat = { 
	.release = single_release,

};



static int read_agc(struct seq_file *file, void *data)

{

	struct mt76x2_dev *dev = dev_get_drvdata(file->private);



	seq_printf(file, "avg_rssi: %d\n", dev->cal.avg_rssi_all);

	seq_printf(file, "low_gain: %d\n", dev->cal.low_gain);

	seq_printf(file, "false_cca: %d\n", dev->cal.false_cca);

	seq_printf(file, "agc_gain_adjust: %d\n", dev->cal.agc_gain_adjust);



	return 0;

}



void mt76x2_init_debugfs(struct mt76x2_dev *dev)

{

	struct dentry *dir;
@@ -130,4 +142,6 @@ void mt76x2_init_debugfs(struct mt76x2_dev *dev) 
	debugfs_create_file("dfs_stats", 0400, dir, dev, &fops_dfs_stat);

	debugfs_create_devm_seqfile(dev->mt76.dev, "txpower", dir,

				    read_txpower);



	debugfs_create_devm_seqfile(dev->mt76.dev, "agc", dir, read_agc);

}

drivers/net/wireless/mediatek/mt76/mt76x2_phy.c

+1 −0
Original line number Diff line number Diff line
@@ -488,6 +488,7 @@ mt76x2_phy_adjust_vga_gain(struct mt76x2_dev *dev) 
	u8 limit = dev->cal.low_gain > 0 ? 16 : 4;



	false_cca = FIELD_GET(MT_RX_STAT_1_CCA_ERRORS, mt76_rr(dev, MT_RX_STAT_1));

	dev->cal.false_cca = false_cca;

	if (false_cca > 800 && dev->cal.agc_gain_adjust < limit)

		dev->cal.agc_gain_adjust += 2;

	else if (false_cca < 10 && dev->cal.agc_gain_adjust > 0)

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