RE: [PATCH] wifi: rtl8xxxu: fixing IQK failures for rtl8192eu

[Ping-Ke Shih]

> -----Original Message-----
> From: Jun ASAKA <JunASAKA@xxxxxxxxxxxxx>
> Sent: Thursday, December 1, 2022 9:39 AM
> To: Ping-Ke Shih <pkshih@xxxxxxxxxxx>; Jes.Sorensen@xxxxxxxxx
> Cc: kvalo@xxxxxxxxxx; davem@xxxxxxxxxxxxx; edumazet@xxxxxxxxxx; kuba@xxxxxxxxxx; pabeni@xxxxxxxxxx;
> linux-wireless@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH] wifi: rtl8xxxu: fixing IQK failures for rtl8192eu
> 
> On 01/12/2022 8:54 am, Ping-Ke Shih wrote:
> 
> >
> >> -----Original Message-----
> >> From: JunASAKA <JunASAKA@xxxxxxxxxxxxx>
> >> Sent: Wednesday, November 30, 2022 10:09 PM
> >> To: Jes.Sorensen@xxxxxxxxx
> >> Cc: kvalo@xxxxxxxxxx; davem@xxxxxxxxxxxxx; edumazet@xxxxxxxxxx; kuba@xxxxxxxxxx; pabeni@xxxxxxxxxx;
> >> linux-wireless@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; JunASAKA
> >> <JunASAKA@xxxxxxxxxxxxx>
> >> Subject: [PATCH] wifi: rtl8xxxu: fixing IQK failures for rtl8192eu
> >>
> >> Fixing "Path A RX IQK failed" and "Path B RX IQK failed"
> >> issues for rtl8192eu chips by replacing the arguments with
> >> the ones in the updated official driver.
> > I think it would be better if you can point out which version you use, and
> > people will not modify them back to old version suddenly.
> >
> >> Signed-off-by: JunASAKA <JunASAKA@xxxxxxxxxxxxx>
> >> ---
> >>   .../realtek/rtl8xxxu/rtl8xxxu_8192e.c         | 76 +++++++++++++------
> >>   1 file changed, 54 insertions(+), 22 deletions(-)
> >>
> >> diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8192e.c
> >> b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8192e.c
> >> index b06508d0cd..82346500f2 100644
> >> --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8192e.c
> >> +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8192e.c
> > [...]
> >
> >> @@ -891,22 +907,28 @@ static int rtl8192eu_iqk_path_b(struct rtl8xxxu_priv *priv)
> >>
> >>   	rtl8xxxu_write32(priv, REG_FPGA0_IQK, 0x00000000);
> >>   	rtl8xxxu_write_rfreg(priv, RF_B, RF6052_REG_UNKNOWN_DF, 0x00180);
> >> -	rtl8xxxu_write32(priv, REG_FPGA0_IQK, 0x80800000);
> >>
> >> -	rtl8xxxu_write32(priv, REG_FPGA0_IQK, 0x00000000);
> >> +	rtl8xxxu_write_rfreg(priv, RF_B, RF6052_REG_WE_LUT, 0x800a0);
> >> +	rtl8xxxu_write_rfreg(priv, RF_B, RF6052_REG_RCK_OS, 0x20000);
> >> +	rtl8xxxu_write_rfreg(priv, RF_B, RF6052_REG_TXPA_G1, 0x0000f);
> >> +	rtl8xxxu_write_rfreg(priv, RF_B, RF6052_REG_TXPA_G2, 0x07f77);
> >> +
> >>   	rtl8xxxu_write32(priv, REG_FPGA0_IQK, 0x80800000);
> >>
> >> +	// rtl8xxxu_write32(priv, REG_FPGA0_IQK, 0x00000000);
> >> +	// rtl8xxxu_write32(priv, REG_FPGA0_IQK, 0x80800000);
> >> +
> > I think this is a test code of vendor driver. No need them here.
> >
> >
> >>   	/* Path B IQK setting */
> >>   	rtl8xxxu_write32(priv, REG_TX_IQK_TONE_A, 0x38008c1c);
> >>   	rtl8xxxu_write32(priv, REG_RX_IQK_TONE_A, 0x38008c1c);
> >>   	rtl8xxxu_write32(priv, REG_TX_IQK_TONE_B, 0x18008c1c);
> >>   	rtl8xxxu_write32(priv, REG_RX_IQK_TONE_B, 0x38008c1c);
> >>
> >> -	rtl8xxxu_write32(priv, REG_TX_IQK_PI_B, 0x821403e2);
> >> +	rtl8xxxu_write32(priv, REG_TX_IQK_PI_B, 0x82140303);
> >>   	rtl8xxxu_write32(priv, REG_RX_IQK_PI_B, 0x68160000);
> >>
> >>   	/* LO calibration setting */
> >> -	rtl8xxxu_write32(priv, REG_IQK_AGC_RSP, 0x00492911);
> >> +	rtl8xxxu_write32(priv, REG_IQK_AGC_RSP, 0x00462911);
> >>
> >>   	/* One shot, path A LOK & IQK */
> >>   	rtl8xxxu_write32(priv, REG_IQK_AGC_PTS, 0xfa000000);
> > [...]
> >
> > I have compared your patch with internal code, and they are the same.
> > But, I don't have a test.
> >
> > Ping-Ke
> 
> I changed those arguments into the ones here:
> https://github.com/Mange/rtl8192eu-linux-driver which works fine with my
> rtl8192eu wifi dongle. But forgive my ignorant that I don't have enough
> experience on wifi drivers, I just compared those two drivers and
> figured that those codes fixing my IQK failures.

I do similar things as well. :-)

The github repository mentioned 
"This branch is based on Realtek's driver versioned 4.4.1. master is based on 4.3.1.1 originally."
So, we can add something to commit message: 
1. https://github.com/Mange/rtl8192eu-linux-driver 
2. vendor driver version: 4.3.1.1

--
Ping-Ke