mirror
/
linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mt76: add a debugfs file to dump agc calibration information 

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

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Felix Fietkau 2018-06-21 11:17:59 +02:00 committed by Kalle Valo
parent 8e31f0d35a
commit 108ec4dafd
3 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/wireless/mediatek/mt76/mt76x2.h
View File

@ -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;

14
drivers/net/wireless/mediatek/mt76/mt76x2_debugfs.c
View File

@ -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);
}

1
drivers/net/wireless/mediatek/mt76/mt76x2_phy.c
View File

@ -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)