On 5/18/26 3:13 PM, Sascha Hauer wrote:
> The SDMA engine doesn't seem to be fast enough to keep up with HS400
> support. In preparation to add HS400 support to the driver switch to
> ADMA when available.
>
> Assisted-by: Claude Opus 4.7
> Signed-off-by: Sascha Hauer <[email protected]>
Reviewed-by: Ahmad Fatoum <[email protected]>
> ---
> drivers/mci/rockchip-dwcmshc-sdhci.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/mci/rockchip-dwcmshc-sdhci.c
> b/drivers/mci/rockchip-dwcmshc-sdhci.c
> index 04ee528f07..23c887e906 100644
> --- a/drivers/mci/rockchip-dwcmshc-sdhci.c
> +++ b/drivers/mci/rockchip-dwcmshc-sdhci.c
> @@ -361,6 +361,11 @@ static int rk_sdhci_probe(struct device *dev)
>
> sdhci_setup_host(&host->sdhci);
>
> + ret = sdhci_setup_adma(&host->sdhci);
> + if (ret && ret != -ENOTSUPP)
> + dev_warn(dev, "ADMA setup failed (%pe), falling back to SDMA\n",
> + ERR_PTR(ret));
> +
> dev->priv = host;
>
> return mci_register(&host->mci);
>
--
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