linux-kernel - Re: [PATCH] mmc: sdhci-of-dwcmshc: Fix command queue support for RK3576

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Message-ID: <CAPDyKFp4oNWQn3xW3+GGbGmi8U7H98Bbos0vRqaQPaht54nZ=w@mail.gmail.com>
Date: Tue, 25 Nov 2025 14:00:16 +0100
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Sebastian Reichel <sebastian.reichel@...labora.com>
Cc: Shawn Lin <shawn.lin@...k-chips.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Yifeng Zhao <yifeng.zhao@...k-chips.com>, linux-mmc@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH] mmc: sdhci-of-dwcmshc: Fix command queue support for RK3576

On Fri, 21 Nov 2025 at 17:27, Sebastian Reichel
<sebastian.reichel@...labora.com> wrote:
>
> When I added command queue engine (CQE) support for the Rockchip eMMC
> controller, I missed that RK3576 has a separate platform data struct.
> While things are working fine on RK3588 (I tested the ROCK 5B) and
> the suspend issue is fixed on the RK3576 (I tested the Sige5), this
> results in stability issues. By also adding the necessary hooks for
> the RK3576 platform the following problems can be avoided:
>
> [   15.606895] mmc0: running CQE recovery
> [   15.616189] mmc0: running CQE recovery
> [...]
> [   25.911484] mmc0: running CQE recovery
> [   25.926305] mmc0: running CQE recovery
> [   25.927468] mmc0: running CQE recovery
> [...]
> [   26.255719] mmc0: running CQE recovery
> [   26.257162] ------------[ cut here ]------------
> [   26.257581] mmc0: cqhci: spurious TCN for tag 31
> [   26.258034] WARNING: CPU: 0 PID: 0 at drivers/mmc/host/cqhci-core.c:796 cqhci_irq+0x440/0x68c
> [   26.263786] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.18.0-rc6-gd984ebbf0d15 #1 PREEMPT
> [   26.264561] Hardware name: ArmSoM Sige5 (DT)
> [...]
> [   26.272748] Call trace:
> [   26.272964]  cqhci_irq+0x440/0x68c (P)
> [   26.273296]  dwcmshc_cqe_irq_handler+0x54/0x88
> [   26.273689]  sdhci_irq+0xbc/0x1200
> [   26.273991]  __handle_irq_event_percpu+0x54/0x1d0
> [...]
>
> Note that the above problems do not necessarily happen with every boot.
>
> Reported-by: Adrian Hunter <adrian.hunter@...el.com>
> Closes: https://lore.kernel.org/linux-rockchip/01949bc9-4873-498b-ac7d-f008393ccc4c@intel.com/
> Fixes: fda1e0af7c28f ("mmc: sdhci-of-dwcmshc: Add command queue support for rockchip SOCs")
> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>

Applied for next, thanks!

Kind regards
Uffe


> ---
> Sorry for the delay in sending this :)
> ---
>  drivers/mmc/host/sdhci-of-dwcmshc.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
> index c66a8dfad47c..ee0008d91b98 100644
> --- a/drivers/mmc/host/sdhci-of-dwcmshc.c
> +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
> @@ -1767,6 +1767,7 @@ static const struct dwcmshc_pltfm_data sdhci_dwcmshc_rk3576_pdata = {
>                 .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
>                            SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
>         },
> +       .cqhci_host_ops = &rk35xx_cqhci_ops,
>         .init = dwcmshc_rk35xx_init,
>         .postinit = dwcmshc_rk3576_postinit,
>  };
>
> ---
> base-commit: dcbce328d3a2d87770133834210cf328c083d480
> change-id: 20251121-rockchip-emmc-cqe-rk3576-fix-ec8ac72e6e32
>
> Best regards,
> --
> Sebastian Reichel <sebastian.reichel@...labora.com>
>