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

From: Chris Morgan <[email-masked]>
Date: Wed, 4 Jan 2023 11:05:01 -0600

On Wed, Jan 04, 2023 at 04:40:51PM +0100, Martin Blumenstingl wrote:
> Hi Chris,
> 
> On Wed, Jan 4, 2023 at 12:01 AM Chris Morgan <[email-masked]> wrote:
> >
> > On Wed, Dec 28, 2022 at 12:30:20AM +0100, Martin Blumenstingl wrote:
> > > Wire up RTL8821CS chipset support using the new rtw88 SDIO HCI code as
> > > well as the existing RTL8821C chipset code.
> > >
> >
> > Unfortunately, this doesn't work for me. I applied it on top of 6.2-rc2
> > master and I get errors during probe (it appears the firmware never
> > loads).
> That's unfortunate.
> 
> > Relevant dmesg logs are as follows:
> >
> > [    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.

> Best regards,
> Martin