linux-kernel - Re: [RFC PATCH v1 19/19] rtw88: Add support for the SDIO based RTL8821CS chipset

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Message-ID: <CAFBinCCvf8E6jwjtoSgATnBxULgytFsUnphzUuaVPygsO3Prwg@mail.gmail.com>
Date:   Wed, 4 Jan 2023 18:23:24 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Chris Morgan <macroalpha82@...il.com>
Cc:     linux-wireless@...r.kernel.org,
        Yan-Hsuan Chuang <tony0620emma@...il.com>,
        Kalle Valo <kvalo@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-mmc@...r.kernel.org, Nitin Gupta <nitin.gupta981@...il.com>,
        Neo Jou <neojou@...il.com>, Pkshih <pkshih@...ltek.com>,
        Jernej Skrabec <jernej.skrabec@...il.com>
Subject: Re: [RFC PATCH v1 19/19] rtw88: Add support for the SDIO based
 RTL8821CS chipset

On Wed, Jan 4, 2023 at 6:05 PM Chris Morgan <macroalpha82@...il.com> wrote:
[...]
> > > [    0.989545] mmc2: new high speed SDIO card at address 0001
> > > [    0.989993] rtw_8821cs mmc2:0001:1: Firmware version 24.8.0, H2C version 12
> > > [    1.005684] rtw_8821cs mmc2:0001:1: sdio write32 failed (0x14): -110
> > > [    1.005737] rtw_8821cs mmc2:0001:1: sdio read32 failed (0x1080): -110
> > > [    1.005789] rtw_8821cs mmc2:0001:1: sdio write32 failed (0x11080): -110
> > > [    1.005840] rtw_8821cs mmc2:0001:1: sdio read8 failed (0x3): -110
> > > [    1.005920] rtw_8821cs mmc2:0001:1: sdio read8 failed (0x1103): -110
> > > [    1.005998] rtw_8821cs mmc2:0001:1: sdio read32 failed (0x80): -110
> > > [    1.006078] rtw_8821cs mmc2:0001:1: sdio read32 failed (0x1700): -110
> > The error starts with a write to register 0x14 (REG_SDIO_HIMR), which
> > happens right after configuring RX aggregation.
> > Can you please try two modifications inside
> > drivers/net/wireless/realtek/rtw88/sdio.c:
> > 1. inside the rtw_sdio_start() function: change
> > "rtw_sdio_rx_aggregation(rtwdev, false);" to
> > "rtw_sdio_rx_aggregation(rtwdev, true);"
>
> No change, still receive identical issue.
>
> > 2. if 1) does not work: remove the call to rtw_sdio_rx_aggregation()
> > from rtw_sdio_start()
> >
>
> Same here, still receive identical issue.
Thanks for testing and for reporting back!

Looking back at it again: I think I mis-interpreted your error output.
I think it's actually failing in __rtw_mac_init_system_cfg()

Can you please try the latest code from [0] (ignoring any changes I
recommended previously)?
There's two bug fixes in there (compared to this series) which may
solve the issue that you are seeing:
- fix typos to use "if (!*err_ret ..." (to read the error code)
instead of "if (!err_ret ..." (which just checks if a non-null pointer
was passed) in rtw_sdio_read_indirect{8,32}
- change buf[0] to buf[i] in rtw_sdio_read_indirect_bytes

These fixes will be part of v2 of this series anyways.


Best regards,
Martin


[0] https://github.com/xdarklight/linux/tree/d115a8631d208996510822f0805df5dfc8dfb548