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wifi: rtw89: regd: judge 6 GHz according to chip and BIOS

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We allow platform to disable 6 GHz on chips, which supports 6 GHz, through
BIOS. Driver will evaluate Realtek acpi DSM with RTW89_ACPI_DSM_FUNC_6G_DIS
(function 3) to get whether 6 GHz should be disabled.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230602150556.36777-3-pkshih@realtek.com
This commit is contained in:
Zong-Zhe Yang 2023-06-02 23:05:50 +08:00 committed by Kalle Valo
parent b7d170d5a6
commit ffc2351153
1 changed files with 50 additions and 0 deletions
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50
drivers/net/wireless/realtek/rtw89/regd.c
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@ -330,6 +330,55 @@ bottom:
sband->n_channels -= 3;
}
static void rtw89_regd_setup_6ghz(struct rtw89_dev *rtwdev, struct wiphy *wiphy)
{
const struct rtw89_chip_info *chip = rtwdev->chip;
bool chip_support_6ghz = chip->support_bands & BIT(NL80211_BAND_6GHZ);
bool regd_allow_6ghz = chip_support_6ghz;
struct ieee80211_supported_band *sband;
int ret;
u8 val;
if (!chip_support_6ghz)
goto bottom;
ret = rtw89_acpi_evaluate_dsm(rtwdev, RTW89_ACPI_DSM_FUNC_6G_DIS, &val);
if (ret) {
rtw89_debug(rtwdev, RTW89_DBG_REGD,
"acpi: cannot eval 6ghz: %d\n", ret);
goto bottom;
}
rtw89_debug(rtwdev, RTW89_DBG_REGD,
"acpi: eval if disallow 6ghz: %d\n", val);
switch (val) {
case 0:
regd_allow_6ghz = true;
break;
case 1:
regd_allow_6ghz = false;
break;
default:
break;
}
bottom:
rtw89_debug(rtwdev, RTW89_DBG_REGD, "regd: allow 6ghz: %d\n",
regd_allow_6ghz);
if (regd_allow_6ghz)
return;
sband = wiphy->bands[NL80211_BAND_6GHZ];
if (!sband)
return;
wiphy->bands[NL80211_BAND_6GHZ] = NULL;
kfree(sband->iftype_data);
kfree(sband);
}
int rtw89_regd_setup(struct rtw89_dev *rtwdev)
{
struct wiphy *wiphy = rtwdev->hw->wiphy;
@ -338,6 +387,7 @@ int rtw89_regd_setup(struct rtw89_dev *rtwdev)
return -EINVAL;
rtw89_regd_setup_unii4(rtwdev, wiphy);
rtw89_regd_setup_6ghz(rtwdev, wiphy);
wiphy->reg_notifier = rtw89_regd_notifier;
return 0;