linux-kernel - Re: [PATCH v2 3/5] drm/msm/dp: Support up to 3 DP controllers

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Message-ID: <YSkdaljt7DPbyTDe@builder.lan>
Date:   Fri, 27 Aug 2021 12:14:18 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     Abhinav Kumar <abhinavk@...eaurora.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Kalyan Thota <kalyan_t@...eaurora.org>,
        Kuogee Hsieh <khsieh@...eaurora.org>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/5] drm/msm/dp: Support up to 3 DP controllers

On Fri 27 Aug 00:20 CDT 2021, Stephen Boyd wrote:

> Quoting Bjorn Andersson (2021-08-25 16:42:31)
> > diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> > index 2c7de43f655a..4a6132c18e57 100644
> > --- a/drivers/gpu/drm/msm/dp/dp_display.c
> > +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> > @@ -78,6 +78,8 @@ struct dp_display_private {
> >         char *name;
> >         int irq;
> >
> > +       int id;
> > +
> >         /* state variables */
> >         bool core_initialized;
> >         bool hpd_irq_on;
> > @@ -115,8 +117,19 @@ struct dp_display_private {
> >         struct dp_audio *audio;
> >  };
> >
> > +
> > +struct msm_dp_config {
> > +       phys_addr_t io_start[3];
> 
> Can this be made into another struct, like msm_dp_desc, that also
> indicates what type of DP connector it is, i.e. eDP vs DP? That would
> help me understand in modetest and /sys/class/drm what sort of connector
> is probing. dp_drm_connector_init() would need to pass the type of
> connector appropriately. Right now, eDP connectors still show up as DP
> instead of eDP in sysfs.
> 

I like it, will spin a v3 with this.

Regards,
Bjorn

> > +       size_t num_dp;
> > +};
> > +
> > +static const struct msm_dp_config sc7180_dp_cfg = {
> > +       .io_start = { 0x0ae90000 },
> > +       .num_dp = 1,
> > +};
> > +
> >  static const struct of_device_id dp_dt_match[] = {
> > -       {.compatible = "qcom,sc7180-dp"},
> > +       { .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_cfg },
> >         {}
> >  };
> >