On 10/02/20 10:49 am, haibo.chen@xxxxxxx wrote:
> From: Haibo Chen <haibo.chen@xxxxxxx>
>
> On i.MX8MM, we are running Dual Linux OS, with 1st Linux using SD Card
> as rootfs storage, 2nd Linux using eMMC as rootfs storage. We let the
> the 1st linux configure power/clock for the 2nd Linux.
>
> When the 2nd Linux is booting into rootfs stage, we let the 1st Linux
> to destroy the 2nd linux, then restart the 2nd linux, we met SDHCI dump
> as following, after we clear the pending interrupt and halt CQCTL, issue
> gone.
>
> [ 1.334594] mmc2: Got command interrupt 0x00000001 even though no command operation was in progress.
> [ 1.334595] mmc2: sdhci: ============ SDHCI REGISTER DUMP ===========
> [ 1.334599] mmc2: sdhci: Sys addr: 0xa05dcc00 | Version: 0x00000002
> [ 1.345538] mmc2: sdhci: Blk size: 0x00000200 | Blk cnt: 0x00000000
> [ 1.345541] mmc2: sdhci: Argument: 0x00018000 | Trn mode: 0x00000033
> [ 1.345543] mmc2: sdhci: Present: 0x01f88008 | Host ctl: 0x00000031
> [ 1.345547] mmc2: sdhci: Power: 0x00000002 | Blk gap: 0x00000080
> [ 1.357903] mmc2: sdhci: Wake-up: 0x00000008 | Clock: 0x0000003f
> [ 1.357905] mmc2: sdhci: Timeout: 0x0000008f | Int stat: 0x00000000
> [ 1.357908] mmc2: sdhci: Int enab: 0x107f100b | Sig enab: 0x107f100b
> [ 1.357911] mmc2: sdhci: AC12 err: 0x00000000 | Slot int: 0x00000502
> [ 1.370268] mmc2: sdhci: Caps: 0x07eb0000 | Caps_1: 0x0000b400
> [ 1.370270] mmc2: sdhci: Cmd: 0x00000d1a | Max curr: 0x00ffffff
> [ 1.370273] mmc2: sdhci: Resp[0]: 0x00000b00 | Resp[1]: 0xffffffff
> [ 1.370276] mmc2: sdhci: Resp[2]: 0x328f5903 | Resp[3]: 0x00d00f00
> [ 1.382132] mmc2: sdhci: Host ctl2: 0x00000000
> [ 1.382135] mmc2: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0xa2040208
>
> [ 2.060932] mmc2: Unexpected interrupt 0x00004000.
> [ 2.065538] mmc2: sdhci: ============ SDHCI REGISTER DUMP ===========
> [ 2.071720] mmc2: sdhci: Sys addr: 0x00000000 | Version: 0x00000002
> [ 2.077902] mmc2: sdhci: Blk size: 0x00000200 | Blk cnt: 0x00000001
> [ 2.084083] mmc2: sdhci: Argument: 0x00000000 | Trn mode: 0x00000000
> [ 2.090264] mmc2: sdhci: Present: 0x01f88009 | Host ctl: 0x00000011
> [ 2.096446] mmc2: sdhci: Power: 0x00000002 | Blk gap: 0x00000080
> [ 2.102627] mmc2: sdhci: Wake-up: 0x00000008 | Clock: 0x000010ff
> [ 2.108809] mmc2: sdhci: Timeout: 0x0000008f | Int stat: 0x00004000
> [ 2.114990] mmc2: sdhci: Int enab: 0x007f1003 | Sig enab: 0x007f1003
> [ 2.121171] mmc2: sdhci: AC12 err: 0x00000000 | Slot int: 0x00000502
> [ 2.127353] mmc2: sdhci: Caps: 0x07eb0000 | Caps_1: 0x0000b400
> [ 2.133534] mmc2: sdhci: Cmd: 0x0000371a | Max curr: 0x00ffffff
> [ 2.139715] mmc2: sdhci: Resp[0]: 0x00000900 | Resp[1]: 0xffffffff
> [ 2.145896] mmc2: sdhci: Resp[2]: 0x328f5903 | Resp[3]: 0x00d00f00
> [ 2.152077] mmc2: sdhci: Host ctl2: 0x00000000
> [ 2.156342] mmc2: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
>
> Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-esdhc-imx.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index 100c081cfcae..106097cbd0d4 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -1233,6 +1233,7 @@ static void sdhci_esdhc_imx_hwinit(struct sdhci_host *host)
> {
> struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
> + struct cqhci_host *cq_host = host->mmc->cqe_private;
> int tmp;
>
> if (esdhc_is_usdhc(imx_data)) {
> @@ -1309,6 +1310,21 @@ static void sdhci_esdhc_imx_hwinit(struct sdhci_host *host)
> tmp &= ~ESDHC_STD_TUNING_EN;
> writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL);
> }
> +
> + /*
> + * On i.MX8MM, we are running Dual Linux OS, with 1st Linux using SD Card
> + * as rootfs storage, 2nd Linux using eMMC as rootfs storage. We let the
> + * the 1st linux configure power/clock for the 2nd Linux.
> + *
> + * When the 2nd Linux is booting into rootfs stage, we let the 1st Linux
> + * to destroy the 2nd linux, then restart the 2nd linux, we met SDHCI dump.
> + * After we clear the pending interrupt and halt CQCTL, issue gone.
> + */
> + if (cq_host) {
> + tmp = cqhci_readl(cq_host, CQHCI_IS);
> + cqhci_writel(cq_host, tmp, CQHCI_IS);
> + cqhci_writel(cq_host, CQHCI_HALT, CQHCI_CTL);
> + }
> }
> }
>
>
