Re: [RFC PATCH] mmc: sdhci-pxav3: set NEED_RSP_BUSY capability
From: Adrian Hunter
Date: Fri Mar 14 2025 - 09:51:09 EST
On 10/03/25 16:07, Karel Balej wrote:
> Set the MMC_CAP_NEED_RSP_BUSY capability for the sdhci-pxav3 host to
> prevent conversion of R1B responses to R1. Without this, the eMMC card
> in the samsung,coreprimevelte smartphone using the Marvell PXA1908 SoC
> with this mmc host doesn't probe with the ETIMEDOUT error originating in
> __mmc_poll_for_busy.
>
> Note that the other issues reported for this phone and host, namely
> floods of "Tuning failed, falling back to fixed sampling clock" dmesg
> messages for the eMMC and unstable SDIO are not mitigated by this
> change.
>
> Link: https://lore.kernel.org/r/20200310153340.5593-1-ulf.hansson@xxxxxxxxxx/
> Link: https://lore.kernel.org/r/D7204PWIGQGI.1FRFQPPIEE2P9@xxxxxxxxx/
> Link: https://lore.kernel.org/r/20250115-pxa1908-lkml-v14-0-847d24f3665a@xxxxxxxx/
> Cc: Duje Mihanović <duje.mihanovic@xxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Karel Balej <balejk@xxxxxxxxx>
There doesn't seem to be much interest in this driver except from
Karel Balej and it looks OK, so:
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-pxav3.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
> index 990723a008ae..3fb56face3d8 100644
> --- a/drivers/mmc/host/sdhci-pxav3.c
> +++ b/drivers/mmc/host/sdhci-pxav3.c
> @@ -399,6 +399,7 @@ static int sdhci_pxav3_probe(struct platform_device *pdev)
> if (!IS_ERR(pxa->clk_core))
> clk_prepare_enable(pxa->clk_core);
>
> + host->mmc->caps |= MMC_CAP_NEED_RSP_BUSY;
> /* enable 1/8V DDR capable */
> host->mmc->caps |= MMC_CAP_1_8V_DDR;
>