Hi Prashant,
Thank you for the review and feedback.
> -----Original Message-----
> From: Prashant Malani <pmalani@xxxxxxxxxxxx>
> Sent: Friday, September 8, 2023 10:03 AM
> To: Patel, Utkarsh H <utkarsh.h.patel@xxxxxxxxx>
> Cc: linux-kernel@xxxxxxxxxxxxxxx; linux-usb@xxxxxxxxxxxxxxx;
> heikki.krogerus@xxxxxxxxxxxxxxx; chrome-platform@xxxxxxxxxxxxxxx;
> andriy.shevchenko@xxxxxxxxxxxxxxx; bleung@xxxxxxxxxxxx
> Subject: Re: [PATCH v2 4/5] platform/chrome: cros_ec_typec: Add Displayport
> Alternatemode 2.1 Support
>
> Hi Utkarsh,
>
> Just a minor thing you can fix for the next version (since it looks like there will
> be one).
>
> On Aug 31 15:24, Patel, Utkarsh H wrote:
> > Hello,
> >
> > > drivers/platform/chrome/cros_ec_typec.c | 31
> > > +++++++++++++++++++++++++
> > > 1 file changed, 31 insertions(+)
> > >
> > > diff --git a/drivers/platform/chrome/cros_ec_typec.c
> > > b/drivers/platform/chrome/cros_ec_typec.c
> > > index d0b4d3fc40ed..8372f13052a8 100644
> > > --- a/drivers/platform/chrome/cros_ec_typec.c
> > > +++ b/drivers/platform/chrome/cros_ec_typec.c
> > > @@ -492,6 +492,8 @@ static int cros_typec_enable_dp(struct
> > > cros_typec_data *typec, {
> > > struct cros_typec_port *port = typec->ports[port_num];
> > > struct typec_displayport_data dp_data;
> > > + u32 cable_tbt_vdo;
> > > + u32 cable_dp_vdo;
> > > int ret;
> > >
> > > if (typec->pd_ctrl_ver < 2) {
> > > @@ -524,6 +526,35 @@ static int cros_typec_enable_dp(struct
> > > cros_typec_data *typec,
> > > port->state.data = &dp_data;
> > > port->state.mode = TYPEC_MODAL_STATE(ffs(pd_ctrl->dp_mode));
> > >
> > > + /* Get cable VDO for cables with DPSID to check DPAM2.1 is
> > > supported */
> > > + cable_dp_vdo = cros_typec_get_cable_vdo(port,
> > > USB_TYPEC_DP_SID);
> > > +
> > > + /**
> > > + * Get cable VDO for thunderbolt cables and cables with DPSID but
> > > does not
> > > + * support DPAM2.1.
> > > + */
> > > + cable_tbt_vdo = cros_typec_get_cable_vdo(port,
> > > USB_TYPEC_TBT_SID);
> > > +
> > > + if (cable_dp_vdo & DP_CAP_DPAM_VERSION) {
> > > + dp_data.conf |= cable_dp_vdo;
> > > + } else if (cable_tbt_vdo) {
> > > + u8 cable_speed = TBT_CABLE_SPEED(cable_tbt_vdo);
> Can we declare this variable at the top? That is the style in this file and quite
> commonly seen elsewhere.
>
> Or better yet, just inline this and get rid of the extra variable altogether:
>
> dp_data.conf |= TBT_CABLE_SPEED(...) <<
> DP_CONF_SIGNALLING_SHIFT;
Ack.
>
> > > +
> > > + dp_data.conf |= cable_speed <<
> > > DP_CONF_SIGNALLING_SHIFT;
> > > +
> > > + /* Cable Type */
> > > + if (cable_tbt_vdo & TBT_CABLE_OPTICAL)
> > > + dp_data.conf |= DP_CONF_CABLE_TYPE_OPTICAL <<
> > > DP_CONF_CABLE_TYPE_SHIFT;
> > > + else if (cable_tbt_vdo & TBT_CABLE_RETIMER)
> > > + dp_data.conf |= DP_CONF_CABLE_TYPE_RE_TIMER <<
> > > DP_CONF_CABLE_TYPE_SHIFT;
> > > + else if (cable_tbt_vdo & TBT_CABLE_ACTIVE_PASSIVE)
> > > + dp_data.conf |= DP_CONF_CABLE_TYPE_RE_DRIVER
> > > << DP_CONF_CABLE_TYPE_SHIFT;
> > > + } else if (PD_IDH_PTYPE(port->c_identity.id_header) ==
> > > IDH_PTYPE_PCABLE) {
> > > + u8 cable_speed = VDO_CABLE_SPEED(port-
> > > >c_identity.vdo[0]);
> Same here, you can inline this without affecting readability too much.
Ack.
Sincerely,
Utkarsh Patel.
