wifi: rtw89: 8852b: rfk: fine tune IQK parameters to improve performance on 2GHz band

A few samples get bad performance on 2GHz band, so use proper IQK command
code and select another group to have wider range of calibration value.

Fixes: f2abe804e823 ("wifi: rtw89: 8852b: rfk: add IQK")
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230803110150.8457-1-pkshih@realtek.com

wifi: rtw89: fix spelling typo of IQK debug messages

Fix spelling typo of IQK debug messages.

Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230614081555.91395-3-dmantipov@yandex.ru

wifi: rtw89: cleanup rtw89_iqk_info and related code

Drop useless '_iqk_track()' and 'rtw8852a_iqk_track()' (they
just change 'thermal_rek_en' field which is set but unused
and so removed as well) functions, set but unused 'kcount'
field of 'struct rtw89_iqk_info', and convert 'thermal' to
local variables where appropriate (it doesn't need to have
longer storage duration because it is actually used for the
debugging purposes only).

Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230614081555.91395-2-dmantipov@yandex.ru

wifi: rtw89: 8852b: Fix spelling mistake KIP_RESOTRE -> KIP_RESTORE

Ther is a spelling mistake in a rtw89_debug message. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221020072646.1513307-1-colin.i.king@gmail.com

wifi: rtw89: 8852b: rfk: add DPK

DPK is short for digital pre-distortion calibration. It can adjusts digital
waveform according to PA linear characteristics dynamically to enhance
TX EVM.

Do this calibration when we are going to run on AP channel. To prevent
power offset out of boundary, it monitors thermal and set proper boundary
to register.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221014060237.29050-2-pkshih@realtek.com

wifi: rtw89: 8852b: rfk: add TSSI

TSSI is transmitter signal strength indication, which is a close-loop
hardware circuit to feedback actual transmitting power as a reference for
next transmission.

When we setup channel to connect an AP, it does full calibration. When
switching bands or channels, it needs to reset hardware status to prevent
use wrong feedback of previous transmission.

To do TX power compensation reflecting current temperature, it loads tables
of compensation values into registers according to channel and band group.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221012083234.20224-6-pkshih@realtek.com

wifi: rtw89: 8852b: rfk: add IQK

IQ signal calibration is a very important calibration to yield good RF
performance. We do this calibration only if we are going to run on AP
channel. During scanning phase, without this calibration RF performance
is still acceptable because it transmits with low data rate at this phase.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221012083234.20224-5-pkshih@realtek.com

wifi: rtw89: 8852b: rfk: add RX DCK

RX DCK is receiver DC calibration. With this calibration, we have proper
DC offset to reflect correct received signal strength indicator. Do this
calibration when bringing up interface and going to run on AP channel.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221012083234.20224-4-pkshih@realtek.com

wifi: rtw89: 8852b: rfk: add RCK

RCK is synchronize RC calibration. Driver triggers this calibration and
sets the result to register. This calibration is needed once when interface
is going to up.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221012083234.20224-3-pkshih@realtek.com

wifi: rtw89: 8852b: rfk: add DACK

DACK (digital-to-analog converters calibration) is used to calibrate DAC
to output good quality signals.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221012083234.20224-2-pkshih@realtek.com

wifi: rtw89: 8852b: add chip_ops::set_channel

set_channel is main function to configure channel and bandwidth for all
layers, namely MAC, BB and RF. Additionally, MAC layer enables CCK rate
checking to avoid wrong rate from driver. BB layer configures SCO
(Sample Clock Offset) for CCK, TX gain error/offset, and reset baseband
hardware circuit after all configurations done.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221005083212.45683-7-pkshih@realtek.com