netdev - Re: [PATCH 1/2] bus: mhi: core: add SBL state callback

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Message-ID: <CAOX2RU6mVCRNobsPDrzpmHqf=KY57GaG4VCruNBfLa8sucydiA@mail.gmail.com>
Date:   Mon, 7 Nov 2022 12:31:57 +0100
From:   Robert Marko <robimarko@...il.com>
To:     Manivannan Sadhasivam <mani@...nel.org>
Cc:     kvalo@...nel.org, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, gregkh@...uxfoundation.org,
        elder@...aro.org, hemantk@...eaurora.org, quic_jhugo@...cinc.com,
        quic_qianyu@...cinc.com, bbhatt@...eaurora.org,
        mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
        ath11k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, ansuelsmth@...il.com
Subject: Re: [PATCH 1/2] bus: mhi: core: add SBL state callback

On Mon, 7 Nov 2022 at 12:28, Manivannan Sadhasivam <mani@...nel.org> wrote:
>
> On Sat, Nov 05, 2022 at 08:49:42PM +0100, Robert Marko wrote:
> > Add support for SBL state callback in MHI core.
> >
> > It is required for ath11k MHI devices in order to be able to set QRTR
> > instance ID in the SBL state so that QRTR instance ID-s dont conflict in
> > case of multiple PCI/MHI cards or AHB + PCI/MHI card.
> > Setting QRTR instance ID is only possible in SBL state and there is
> > currently no way to ensure that we are in that state, so provide a
> > callback that the controller can trigger off.
> >
>
> Where can I find the corresponding ath11k patch that makes use of this
> callback?

Hi Mani,
ath11k patch was sent as part of the same series to everybody included
in this patch as well
under the name of "[PATCH 2/2] wifi: ath11k: use unique QRTR instance ID".

If you did not receive it due to some kind of error, its available at
the linux-wireless patchwork[1]
or ath11k mailing list[2].

[1] https://patchwork.kernel.org/project/linux-wireless/patch/20221105194943.826847-2-robimarko@gmail.com/
[2] http://lists.infradead.org/pipermail/ath11k/2022-November/003678.html

Regards,
Robert

>
> Thanks,
> Mani
>
> > Signed-off-by: Robert Marko <robimarko@...il.com>
> > ---
> >  drivers/bus/mhi/host/main.c | 1 +
> >  include/linux/mhi.h         | 2 ++
> >  2 files changed, 3 insertions(+)
> >
> > diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c
> > index df0fbfee7b78..8b03dd1f0cb8 100644
> > --- a/drivers/bus/mhi/host/main.c
> > +++ b/drivers/bus/mhi/host/main.c
> > @@ -900,6 +900,7 @@ int mhi_process_ctrl_ev_ring(struct mhi_controller *mhi_cntrl,
> >                       switch (event) {
> >                       case MHI_EE_SBL:
> >                               st = DEV_ST_TRANSITION_SBL;
> > +                             mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_SBL_MODE);
> >                               break;
> >                       case MHI_EE_WFW:
> >                       case MHI_EE_AMSS:
> > diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> > index a5441ad33c74..beffe102dd19 100644
> > --- a/include/linux/mhi.h
> > +++ b/include/linux/mhi.h
> > @@ -34,6 +34,7 @@ struct mhi_buf_info;
> >   * @MHI_CB_SYS_ERROR: MHI device entered error state (may recover)
> >   * @MHI_CB_FATAL_ERROR: MHI device entered fatal error state
> >   * @MHI_CB_BW_REQ: Received a bandwidth switch request from device
> > + * @MHI_CB_EE_SBL_MODE: MHI device entered SBL mode
> >   */
> >  enum mhi_callback {
> >       MHI_CB_IDLE,
> > @@ -45,6 +46,7 @@ enum mhi_callback {
> >       MHI_CB_SYS_ERROR,
> >       MHI_CB_FATAL_ERROR,
> >       MHI_CB_BW_REQ,
> > +     MHI_CB_EE_SBL_MODE,
> >  };
> >
> >  /**
> > --
> > 2.38.1
> >
>
> --
> மணிவண்ணன் சதாசிவம்