On Wed, 6 May 2020 at 15:01, Veerabhadrarao Badiganti
<vbadigan@xxxxxxxxxxxxxx> wrote:
>
>
> On 4/28/2020 5:26 AM, Chun-Hung Wu wrote:
> > Parse CQE bindings "supports-cqe" and "disable-cqe-dcmd"
> > in mmc_of_parse().
> >
> > Signed-off-by: Chun-Hung Wu <chun-hung.wu@xxxxxxxxxxxx>
> > ---
> > drivers/mmc/core/host.c | 5 +++++
> > 1 file changed, 5 insertions(+)
> >
> > diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
> > index c876872..47521c6 100644
> > --- a/drivers/mmc/core/host.c
> > +++ b/drivers/mmc/core/host.c
> > @@ -302,6 +302,11 @@ int mmc_of_parse(struct mmc_host *host)
> > host->caps2 |= MMC_CAP2_NO_SD;
> > if (device_property_read_bool(dev, "no-mmc"))
> > host->caps2 |= MMC_CAP2_NO_MMC;
> > + if (device_property_read_bool(dev, "supports-cqe"))
> > + host->caps2 |= MMC_CAP2_CQE;
>
> This change is breaking emmc driver on qcom platforms where this dt
> property is defined.
>
> [ 1.543453] cqhci_deactivate+0xc/0x38
> [ 1.545627] sdhci_msm_reset+0x40/0x58
> [ 1.549447] sdhci_do_reset+0x48/0x7c
> [ 1.553180] __sdhci_read_caps+0x7c/0x214
> [ 1.556913] sdhci_setup_host+0x58/0xce8
> [ 1.560905] sdhci_msm_probe+0x588/0x8a4
> [ 1.564900] platform_drv_probe+0x4c/0xb0
>
> So, we cant have this flag defined before sdhci_setup_host().
>
> I will have to clear this cap and re-enable it in our initialization.
Thanks for reporting! I have dropped all the four patches from
Chun-Hung, so we can figure out how to fix this.
Please help to review the next version of the series.
>
> > + if (!device_property_read_bool(dev, "disable-cqe-dcmd")) {
> > + host->caps2 |= MMC_CAP2_CQE_DCMD;
> > + }
> >
> > /* Must be after "non-removable" check */
> > if (device_property_read_u32(dev, "fixed-emmc-driver-type", &drv_type) == 0) {
Kind regards
Uffe
