On 15/11/19 1:20 PM, 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 1st 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 > [ 1.340819] lib80211: common routines for IEEE802.11 drivers > [ 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> > --- > drivers/mmc/host/sdhci-esdhc-imx.c | 5 +++++ Subject should start "mmc: sdhci-esdhc-imx:" not "mmc: cqhci:" because sdhci-esdhc-imx is being changed. > 1 file changed, 5 insertions(+) > > diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c > index 83b4156b2cf4..7cd5046f33ce 100644 > --- a/drivers/mmc/host/sdhci-esdhc-imx.c > +++ b/drivers/mmc/host/sdhci-esdhc-imx.c > @@ -1483,6 +1483,7 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) > struct cqhci_host *cq_host; > int err; > struct pltfm_imx_data *imx_data; > + u32 status; > > host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata, > sizeof(*imx_data)); > @@ -1590,6 +1591,10 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) > err = cqhci_init(cq_host, host->mmc, false); > if (err) > goto disable_ahb_clk; > + Could use a comment here explaining why this is needed. > + status = cqhci_readl(cq_host, CQHCI_IS); > + cqhci_writel(cq_host, status, CQHCI_IS); > + cqhci_writel(cq_host, CQHCI_HALT, CQHCI_CTL); > } > > if (of_id) >
