On Fri, 2019-10-04 at 14:52 +0200, Nicolas Saenz Julienne 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.
>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@xxxxxxx>
> Tested-by: Matthias Brugger <mbrugger@xxxxxxxx>
Forgot to add:
Fixes: f84e411c85be ("mmc: sdhci-iproc: Add support for emmc2 of the BCM2711")
I'll resend if needed.
Regards,
Nicolas
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