linux-kernel - RE: [PATCH v3 3/4] platform/chrome: cros_ec_typec: Add Displayport Alternatemode 2.1 Support

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Message-ID: <MWHPR11MB00487D601B4CDD3A387BA0E3A9FBA@MWHPR11MB0048.namprd11.prod.outlook.com>
Date:   Mon, 18 Sep 2023 16:19:24 +0000
From:   "Patel, Utkarsh H" <utkarsh.h.patel@...el.com>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
CC:     Prashant Malani <pmalani@...omium.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "chrome-platform@...ts.linux.dev" <chrome-platform@...ts.linux.dev>,
        "andriy.shevchenko@...ux.intel.com" 
        <andriy.shevchenko@...ux.intel.com>,
        "bleung@...omium.org" <bleung@...omium.org>
Subject: RE: [PATCH v3 3/4] platform/chrome: cros_ec_typec: Add Displayport
 Alternatemode 2.1 Support

Hi Heikki,

Thank you for the feedback.

> -----Original Message-----
> From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> Sent: Monday, September 18, 2023 1:04 AM
> To: Patel, Utkarsh H <utkarsh.h.patel@...el.com>
> Cc: Prashant Malani <pmalani@...omium.org>; linux-kernel@...r.kernel.org;
> linux-usb@...r.kernel.org; chrome-platform@...ts.linux.dev;
> andriy.shevchenko@...ux.intel.com; bleung@...omium.org
> Subject: Re: [PATCH v3 3/4] platform/chrome: cros_ec_typec: Add Displayport
> Alternatemode 2.1 Support
> 
> On Fri, Sep 15, 2023 at 04:01:44PM +0000, Patel, Utkarsh H wrote:
> 
> > > > b057250704e8..3a747938cdab 100644
> > > > --- a/include/linux/usb/pd_vdo.h
> > > > +++ b/include/linux/usb/pd_vdo.h
> > > > @@ -376,6 +376,7 @@
> > > >          | ((vbm) & 0x3) << 9 | (sbu) << 8 | (sbut) << 7 | ((cur) & 0x3) << 5   \
> > > >          | (vbt) << 4 | (sopp) << 3 | ((spd) & 0x7))
> > > >
> > > > +#define VDO_TYPEC_CABLE_SPEED(vdo)     ((vdo) & 0x7)
> > >
> > > I would suggest putting this header modification in a separate
> > > patch; if for some reason we have to revert the Chrome part of the
> > > change, then we won't rip this part out too (some other driver down
> > > the road may use the macro and would break if it were to be
> > > removed). But I'll leave it to Heikki to determine whether that is preferred.
> > >
> > Heikki,  What's your preference here?
> 
> I think separate patch for this like Prashant said.

I will add and re-send the removed [PATCH v2 3/5]  in the next version.  

Sincerely,
Utkarsh Patel.