Re: [PATCH v3 1/4] mmc: core: expose MMC_CAP2_CQE* to dt

[Chun-Hung Wu]

On Wed, 2020-03-04 at 14:04 +0100, Ulf Hansson wrote:
> On Mon, 17 Feb 2020 at 07:56, Chun-Hung Wu <chun-hung.wu@xxxxxxxxxxxx> wrote:
> >
> > Expose MMC_CAP2_CQE and MMC_CAP2_CQE_DCMD
> > to host->caps2 if
> > 1. "supports-cqe" is defined in dt and
> > 2. "disable-cqe-dcmd" is not defined in dt.
> 
> Both of these DT properties are defined as common mmc DT properties,
> so the above isn't really correct. Please clarify this.
Yes, the properties is common. But I think the "supports-cqe" or
"disable-cqe-dcmd" is defined in vendor's mmc dt, not common mmc dt?
Don't know what's wrong with the above description, any suggestion?
> 
> Moreover, I suggest to update commit message header into "mmc: core:
> Extend mmc_of_parse() to parse CQE bindings", as I think it better
> describes the change.
Thanks, I think the commit message you provide is better, will change it
in v4.
> 
> >
> > Signed-off-by: Chun-Hung Wu <chun-hung.wu@xxxxxxxxxxxx>
> > ---
> >  drivers/mmc/core/host.c | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> >
> > diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
> > index 105b7a7..efb0dbe 100644
> > --- a/drivers/mmc/core/host.c
> > +++ b/drivers/mmc/core/host.c
> > @@ -319,6 +319,14 @@ 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;
> > +
> > +       /* Must be after "supports-cqe" check */
> > +       if (!device_property_read_bool(dev, "disable-cqe-dcmd")) {
> > +               if (host->caps2 & MMC_CAP2_CQE)
> 
> Does it really doesn't matter if we set this cap, even if MMC_CAP2_CQE
> isn't set? You can probably skip the check above.
Will remove MMC_CAP2_CQE check here.
> 
> > +                       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) {
> > --
> > 1.9.1
> 
> Kind regards
> Uffe