Commit ffc23511 authored by Zong-Zhe Yang's avatar Zong-Zhe Yang Committed by Kalle Valo
Browse files

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



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: default avatarZong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: default avatarPing-Ke Shih <pkshih@realtek.com>
Signed-off-by: default avatarKalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230602150556.36777-3-pkshih@realtek.com
parent b7d170d5

drivers/net/wireless/realtek/rtw89/regd.c

+50 −0
Original line number Diff line number Diff line
@@ -330,6 +330,55 @@ static void rtw89_regd_setup_unii4(struct rtw89_dev *rtwdev, 
	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;