On Fri, 4 Oct 2019 at 15:45, Nicolas Saenz Julienne
<nsaenzjulienne@xxxxxxx> wrote:
>
> The Raspberry Pi 4 SDHCI hardware seems to automatically issue CMD12
> after multiblock reads even when ACMD12 is disabled. This triggers
> spurious interrupts after the data transfer is done with the following
> message:
>
> mmc1: Got data interrupt 0x00000002 even though no data operation was in progress.
> mmc1: sdhci: ============ SDHCI REGISTER DUMP ===========
> mmc1: sdhci: Sys addr: 0x00000000 | Version: 0x00001002
> mmc1: sdhci: Blk size: 0x00007200 | Blk cnt: 0x00000000
> mmc1: sdhci: Argument: 0x00000000 | Trn mode: 0x00000033
> mmc1: sdhci: Present: 0x1fff0000 | Host ctl: 0x00000017
> mmc1: sdhci: Power: 0x0000000f | Blk gap: 0x00000080
> mmc1: sdhci: Wake-up: 0x00000000 | Clock: 0x00000107
> mmc1: sdhci: Timeout: 0x00000000 | Int stat: 0x00000000
> mmc1: sdhci: Int enab: 0x03ff100b | Sig enab: 0x03ff100b
> mmc1: sdhci: ACmd stat: 0x00000000 | Slot int: 0x00000000
> mmc1: sdhci: Caps: 0x45ee6432 | Caps_1: 0x0000a525
> mmc1: sdhci: Cmd: 0x00000c1a | Max curr: 0x00080008
> mmc1: sdhci: Resp[0]: 0x00000b00 | Resp[1]: 0x00edc87f
> mmc1: sdhci: Resp[2]: 0x325b5900 | Resp[3]: 0x00400e00
> mmc1: sdhci: Host ctl2: 0x00000001
> mmc1: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0xf3025208
> mmc1: sdhci: ============================================
>
> Enable SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 to enable ACMD12 on multiblock
> reads and suppress the spurious interrupts.
>
> Fixes: f84e411c85be ("mmc: sdhci-iproc: Add support for emmc2 of the BCM2711")
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@xxxxxxx>
> Tested-by: Matthias Brugger <mbrugger@xxxxxxxx>
> Acked-by: Stefan Wahren <wahrenst@xxxxxxx>
Applied for fixes, thanks!
Kind regards
Uffe
> ---
>
> Changes since v1:
> - Add Fixes tag and Acked-by
>
> drivers/mmc/host/sdhci-iproc.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
> index 2b9cdcd1dd9d..f4f5f0a70cda 100644
> --- a/drivers/mmc/host/sdhci-iproc.c
> +++ b/drivers/mmc/host/sdhci-iproc.c
> @@ -262,6 +262,7 @@ static const struct sdhci_iproc_data bcm2835_data = {
> };
>
> static const struct sdhci_pltfm_data sdhci_bcm2711_pltfm_data = {
> + .quirks = SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
> .ops = &sdhci_iproc_32only_ops,
> };
>
> --
> 2.23.0
>
