Messages in this thread | | | Subject | Re: [PATCH] mmc: sdhci-iproc: fix spurious interrupts on Multiblock reads with bcm2711 | From | Nicolas Saenz Julienne <> | Date | Fri, 04 Oct 2019 14:59:35 +0200 |
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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@suse.de> > Tested-by: Matthias Brugger <mbrugger@suse.com>
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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