[PATCH 4/6] drivers: net: octeontx: fix QSGMII

[Suneel Garapati <suneelglinux@gmail.com>]

This looks like a workaround than the root cause fix.
As this patch just moves the bringup of link from probe stage to on-demand.

On Thu, Mar 25, 2021 at 11:46 PM Stefan Roese <sr@denx.de> wrote:
>
> On 26.03.21 01:07, Tim Harvey wrote:
> > Revert a change that occured between the Marvell SDK-10.1.1.0
> > and SDK-10.3.1.1 which broke QSMII phy support.
> >
> > Signed-off-by: Tim Harvey <tharvey@gateworks.com>
>
> Thanks.
>
> Suneel, do you have a comment on this? Is this revert the "best way" to
> handle this?
>
> Thanks,
> Stefan
>
> > ---
> >   drivers/net/octeontx/bgx.c | 20 +++++++-------------
> >   1 file changed, 7 insertions(+), 13 deletions(-)
> >
> > diff --git a/drivers/net/octeontx/bgx.c b/drivers/net/octeontx/bgx.c
> > index 2ea54be84d..a5c0c9fe2b 100644
> > --- a/drivers/net/octeontx/bgx.c
> > +++ b/drivers/net/octeontx/bgx.c
> > @@ -36,7 +36,6 @@ struct lmac {
> >       int                     dmac;
> >       u8                      mac[6];
> >       bool                    link_up;
> > -     bool                    init_pend;
> >       int                     lmacid; /* ID within BGX */
> >       int                     phy_addr; /* ID on board */
> >       struct udevice          *dev;
> > @@ -849,6 +848,7 @@ static int bgx_lmac_enable(struct bgx *bgx, int8_t lmacid)
> >       u64 cfg;
> >
> >       lmac = &bgx->lmac[lmacid];
> > +     lmac->bgx = bgx;
> >
> >       debug("%s: lmac: %p, lmacid = %d\n", __func__, lmac, lmacid);
> >
> > @@ -895,16 +895,6 @@ int bgx_poll_for_link(int node, int bgx_idx, int lmacid)
> >       debug("%s: %d, lmac: %d/%d/%d %p\n",
> >             __FILE__, __LINE__,
> >             node, bgx_idx, lmacid, lmac);
> > -     if (lmac->init_pend) {
> > -             ret = bgx_lmac_enable(lmac->bgx, lmacid);
> > -             if (ret < 0) {
> > -                     printf("BGX%d LMAC%d lmac_enable failed\n", bgx_idx,
> > -                            lmacid);
> > -                     return ret;
> > -             }
> > -             lmac->init_pend = 0;
> > -             mdelay(100);
> > -     }
> >       if (lmac->qlm_mode == QLM_MODE_SGMII ||
> >           lmac->qlm_mode == QLM_MODE_RGMII ||
> >           lmac->qlm_mode == QLM_MODE_QSGMII) {
> > @@ -1461,6 +1451,7 @@ int octeontx_bgx_remove(struct udevice *dev)
> >
> >   int octeontx_bgx_probe(struct udevice *dev)
> >   {
> > +     int err;
> >       struct bgx *bgx = dev_get_priv(dev);
> >       u8 lmac = 0;
> >       int qlm[4] = {-1, -1, -1, -1};
> > @@ -1540,8 +1531,11 @@ skip_qlm_config:
> >               struct lmac *tlmac = &bgx->lmac[lmac];
> >
> >               tlmac->dev = dev;
> > -             tlmac->init_pend = 1;
> > -             tlmac->bgx = bgx;
> > +             err = bgx_lmac_enable(bgx, lmac);
> > +             if (err) {
> > +                     printf("BGX%d failed to enable lmac%d\n",
> > +                            bgx->bgx_id, lmac);
> > +             }
> >       }
> >
> >       return 0;
> >
>
>
> Viele Gr??e,
> Stefan
>
> --
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr at denx.de