linux-kernel - RE: [PATCH v6 4/4] i2c: designware: Add doorbell support for Mendocino

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Date:   Mon, 27 Mar 2023 17:05:02 +0000
From:   "Limonciello, Mario" <Mario.Limonciello@....com>
To:     Mark Hasemeyer <markhas@...omium.org>
CC:     Jan Dąbroś <jsd@...ihalf.com>,
        Grzegorz Bernacki <gjb@...ihalf.com>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v6 4/4] i2c: designware: Add doorbell support for
 Mendocino

[Public]

> >  static int psp_send_i2c_req(enum psp_i2c_req_type i2c_req_type)
> >  {
> >         struct psp_i2c_req *req;
> > @@ -87,7 +101,7 @@ static int psp_send_i2c_req(enum psp_i2c_req_type
> i2c_req_type)
> >         req->type = i2c_req_type;
> >
> >         start = jiffies;
> > -       ret = read_poll_timeout(psp_send_i2c_req_cezanne, status,
> > +       ret = read_poll_timeout(_psp_send_i2c_req, status,
> >                                 (status != -EBUSY),
> >                                 PSP_I2C_REQ_RETRY_DELAY_US,
> >                                 PSP_I2C_REQ_RETRY_CNT *
> PSP_I2C_REQ_RETRY_DELAY_US,
> The timeout error handling message after this has "acquire" and
> "release" flopped.
> 

Thx, will fix.

> > @@ -275,6 +291,13 @@ int i2c_dw_amdpsp_probe_lock_support(struct
> dw_i2c_dev *dev)
> >         if (psp_i2c_dev)
> >                 return -EEXIST;
> >
> > +       /* Cezanne uses platform mailbox, Mendocino and later use doorbell
> */
> > +       rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0));
> > +       if (rdev->device == 0x1630)
> > +               _psp_send_i2c_req = psp_send_i2c_req_cezanne;
> > +       else
> > +               _psp_send_i2c_req = psp_send_i2c_req_mendocino;
> Thinking about naming again, perhaps "mendocino" should be dropped
> from the function name as the logic applies to all platforms except
> cezanne.

OK.