Doing adc gain calibration for AR9287 chips is causing
throughput drops in HT40 mode. Remove ADC Gain from supported
calibration list.
Signed-off-by: Rajkumar Manoharan <rmanoharan@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/ar9002_calib.c | 43 ++++++++++++++++++++-----
1 files changed, 35 insertions(+), 8 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/ar9002_calib.c b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
index 76388c6..cb611b2 100644
--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
@@ -26,6 +26,27 @@ enum ar9002_cal_types {
IQ_MISMATCH_CAL = BIT(2),
};
+static bool ar9002_hw_is_cal_supported(struct ath_hw *ah,
+ struct ath9k_channel *chan,
+ enum ar9002_cal_types cal_type)
+{
+ bool supported = false;
+ switch (ah->supp_cals & cal_type) {
+ case IQ_MISMATCH_CAL:
+ /* Run IQ Mismatch for non-CCK only */
+ if (!IS_CHAN_B(chan))
+ supported = true;
+ break;
+ case ADC_GAIN_CAL:
+ case ADC_DC_CAL:
+ /* Run ADC Gain Cal for non-CCK & non 2GHz-HT20 only */
+ if (!IS_CHAN_B(chan) &&
+ !(IS_CHAN_2GHZ(chan) && IS_CHAN_HT20(chan)))
+ supported = true;
+ break;
+ }
+ return supported;
+}
static void ar9002_hw_setup_calibration(struct ath_hw *ah,
struct ath9k_cal_list *currCal)
@@ -858,26 +879,32 @@ static bool ar9002_hw_init_cal(struct ath_hw *ah, struct ath9k_channel *chan)
if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah)) {
ah->supp_cals = IQ_MISMATCH_CAL;
- if (AR_SREV_9160_10_OR_LATER(ah) &&
- !(IS_CHAN_2GHZ(chan) && IS_CHAN_HT20(chan))) {
+ if (AR_SREV_9160_10_OR_LATER(ah))
ah->supp_cals |= ADC_GAIN_CAL | ADC_DC_CAL;
+ if (AR_SREV_9287(ah))
+ ah->supp_cals &= ~ADC_GAIN_CAL;
+ if (ar9002_hw_is_cal_supported(ah, chan, ADC_GAIN_CAL)) {
INIT_CAL(&ah->adcgain_caldata);
INSERT_CAL(ah, &ah->adcgain_caldata);
ath_dbg(common, ATH_DBG_CALIBRATE,
- "enabling ADC Gain Calibration.\n");
+ "enabling ADC Gain Calibration.\n");
+ }
+ if (ar9002_hw_is_cal_supported(ah, chan, ADC_DC_CAL)) {
INIT_CAL(&ah->adcdc_caldata);
INSERT_CAL(ah, &ah->adcdc_caldata);
ath_dbg(common, ATH_DBG_CALIBRATE,
- "enabling ADC DC Calibration.\n");
+ "enabling ADC DC Calibration.\n");
}
- INIT_CAL(&ah->iq_caldata);
- INSERT_CAL(ah, &ah->iq_caldata);
- ath_dbg(common, ATH_DBG_CALIBRATE,
- "enabling IQ Calibration.\n");
+ if (ar9002_hw_is_cal_supported(ah, chan, IQ_MISMATCH_CAL)) {
+ INIT_CAL(&ah->iq_caldata);
+ INSERT_CAL(ah, &ah->iq_caldata);
+ ath_dbg(common, ATH_DBG_CALIBRATE,
+ "enabling IQ Calibration.\n");
+ }
ah->cal_list_curr = ah->cal_list;
--
1.7.4.1
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