package/kernel/mac80211/patches/317-Revert-ath9k_hw-implement-temperature-compensation-s.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Tue, 11 Oct 2016 19:45:41 +0200
   3 Subject: [PATCH] Revert "ath9k_hw: implement temperature compensation support
   4  for AR9003+"
   5
   6 This reverts commit 171f6402e4aa5cd3b8407f82501f7ea21fa54ccc.
   7 Some users report that this commit causes a regression in performance
   8 under some conditions.
   9
  10 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  11 ---
  12
  13 --- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
  14 +++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
  15 @@ -33,7 +33,6 @@ struct coeff {
  16
  17  enum ar9003_cal_types {
  18         IQ_MISMATCH_CAL = BIT(0),
  19 -       TEMP_COMP_CAL = BIT(1),
  20  };
  21
  22  static void ar9003_hw_setup_calibration(struct ath_hw *ah,
  23 @@ -59,12 +58,6 @@ static void ar9003_hw_setup_calibration(
  24                 /* Kick-off cal */
  25                 REG_SET_BIT(ah, AR_PHY_TIMING4, AR_PHY_TIMING4_DO_CAL);
  26                 break;
  27 -       case TEMP_COMP_CAL:
  28 -               ath_dbg(common, CALIBRATE,
  29 -                       "starting Temperature Compensation Calibration\n");
  30 -               REG_SET_BIT(ah, AR_CH0_THERM, AR_CH0_THERM_LOCAL);
  31 -               REG_SET_BIT(ah, AR_CH0_THERM, AR_CH0_THERM_START);
  32 -               break;
  33         default:
  34                 ath_err(common, "Invalid calibration type\n");
  35                 break;
  36 @@ -93,8 +86,7 @@ static bool ar9003_hw_per_calibration(st
  37                 /*
  38                 * Accumulate cal measures for active chains
  39                 */
  40 -               if (cur_caldata->calCollect)
  41 -                       cur_caldata->calCollect(ah);
  42 +               cur_caldata->calCollect(ah);
  43                 ah->cal_samples++;
  44
  45                 if (ah->cal_samples >= cur_caldata->calNumSamples) {
  46 @@ -107,8 +99,7 @@ static bool ar9003_hw_per_calibration(st
  47                         /*
  48                         * Process accumulated data
  49                         */
  50 -                       if (cur_caldata->calPostProc)
  51 -                               cur_caldata->calPostProc(ah, numChains);
  52 +                       cur_caldata->calPostProc(ah, numChains);
  53
  54                         /* Calibration has finished. */
  55                         caldata->CalValid |= cur_caldata->calType;
  56 @@ -323,16 +314,9 @@ static const struct ath9k_percal_data iq
  57         ar9003_hw_iqcalibrate
  58  };
  59
  60 -static const struct ath9k_percal_data temp_cal_single_sample = {
  61 -       TEMP_COMP_CAL,
  62 -       MIN_CAL_SAMPLES,
  63 -       PER_MAX_LOG_COUNT,
  64 -};
  65 -
  66  static void ar9003_hw_init_cal_settings(struct ath_hw *ah)
  67  {
  68         ah->iq_caldata.calData = &iq_cal_single_sample;
  69 -       ah->temp_caldata.calData = &temp_cal_single_sample;
  70
  71         if (AR_SREV_9300_20_OR_LATER(ah)) {
  72                 ah->enabled_cals |= TX_IQ_CAL;
  73 @@ -340,7 +324,7 @@ static void ar9003_hw_init_cal_settings(
  74                         ah->enabled_cals |= TX_IQ_ON_AGC_CAL;
  75         }
  76
  77 -       ah->supp_cals = IQ_MISMATCH_CAL | TEMP_COMP_CAL;
  78 +       ah->supp_cals = IQ_MISMATCH_CAL;
  79  }
  80
  81  #define OFF_UPPER_LT 24
  82 @@ -1399,9 +1383,6 @@ static void ar9003_hw_init_cal_common(st
  83         INIT_CAL(&ah->iq_caldata);
  84         INSERT_CAL(ah, &ah->iq_caldata);
  85
  86 -       INIT_CAL(&ah->temp_caldata);
  87 -       INSERT_CAL(ah, &ah->temp_caldata);
  88 -
  89         /* Initialize current pointer to first element in list */
  90         ah->cal_list_curr = ah->cal_list;
  91
  92 --- a/drivers/net/wireless/ath/ath9k/hw.h
  93 +++ b/drivers/net/wireless/ath/ath9k/hw.h
  94 @@ -830,7 +830,6 @@ struct ath_hw {
  95         /* Calibration */
  96         u32 supp_cals;
  97         struct ath9k_cal_list iq_caldata;
  98 -       struct ath9k_cal_list temp_caldata;
  99         struct ath9k_cal_list adcgain_caldata;
 100         struct ath9k_cal_list adcdc_caldata;
 101         struct ath9k_cal_list *cal_list;