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From: Doug Anderson <dianders@chromium.org>
To: Rajeev Nandan <rajeevny@codeaurora.org>
Cc: Rob Clark <robdclark@chromium.org>,
	dri-devel <dri-devel@lists.freedesktop.org>,
	Jonas Karlman <jonas@kwiboo.se>, David Airlie <airlied@linux.ie>,
	linux-arm-msm <linux-arm-msm@vger.kernel.org>,
	Neil Armstrong <narmstrong@baylibre.com>,
	LKML <linux-kernel@vger.kernel.org>,
	Steev Klimaszewski <steev@kali.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>,
	Andrzej Hajda <a.hajda@samsung.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	Stephen Boyd <swboyd@chromium.org>,
	Thierry Reding <treding@nvidia.com>,
	Sam Ravnborg <sam@ravnborg.org>
Subject: Re: [PATCH v8 07/11] drm/panel: panel-simple: Stash DP AUX bus; allow using it for DDC
Date: Mon, 7 Jun 2021 10:07:01 -0700	[thread overview]
Message-ID: <CAD=FV=UEUsP4qRB-zj31ykS2UznnY=6WF2pD26=FDnVZy6rxCg@mail.gmail.com> (raw)
In-Reply-To: <6e0cd667a8a776e524b42f1535827208@codeaurora.org>

Hi,

On Fri, Jun 4, 2021 at 9:10 AM <rajeevny@codeaurora.org> wrote:
>
> Hi Doug,
>
> >       panel->no_hpd = of_property_read_bool(dev->of_node, "no-hpd");
> >       if (!panel->no_hpd) {
> > @@ -708,6 +712,8 @@ static int panel_simple_probe(struct device *dev,
> > const struct panel_desc *desc)
> >
> >               if (!panel->ddc)
> >                       return -EPROBE_DEFER;
> > +     } else if (aux) {
> > +             panel->ddc = &aux->ddc;
> >       }
>
> In panel_simple_probe(), the put_device(&panel->ddc->dev) call is
> causing issue when the aux->ddc is used to assign panel->ddc
> It works well when "ddc-i2c-bus" is used to assign panel->ddc
>
> static int panel_simple_probe(...)
> {
> ...
>
> free_ddc:
>          if (panel->ddc)
>                  put_device(&panel->ddc->dev);
>
>          return err;
> }

Thanks for catching! Fixed in v9.


-Doug

  reply	other threads:[~2021-06-07 17:07 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-25  0:01 [PATCH v8 00/11] drm: Fix EDID reading on ti-sn65dsi86 by introducing the DP AUX bus Douglas Anderson
2021-05-25  0:01 ` [PATCH v8 01/11] dt-bindings: display: simple: List hpd properties in panel-simple Douglas Anderson
2021-06-02 18:00   ` Rob Herring
2021-05-25  0:01 ` [PATCH v8 02/11] dt-bindings: drm: Introduce the DP AUX bus Douglas Anderson
2021-06-02 18:08   ` Rob Herring
2021-05-25  0:01 ` [PATCH v8 03/11] dt-bindings: drm/bridge: ti-sn65dsi86: Add aux-bus child Douglas Anderson
2021-05-28  0:29   ` Linus Walleij
2021-06-02 18:06     ` Rob Herring
2021-06-02 18:09       ` Rob Herring
2021-06-02 18:10   ` Rob Herring
2021-05-25  0:01 ` [PATCH v8 04/11] dt-bindings: drm/aux-bus: Add an example Douglas Anderson
2021-05-28  0:31   ` Linus Walleij
2021-06-02 18:16   ` Rob Herring
2021-06-02 19:55     ` Doug Anderson
2021-05-25  0:01 ` [PATCH v8 05/11] drm: Introduce the DP AUX bus Douglas Anderson
2021-05-25  0:01 ` [PATCH v8 06/11] drm/panel: panel-simple: Allow panel-simple be a DP AUX endpoint device Douglas Anderson
2021-05-25  0:01 ` [PATCH v8 07/11] drm/panel: panel-simple: Stash DP AUX bus; allow using it for DDC Douglas Anderson
2021-06-04 16:10   ` rajeevny
2021-06-07 17:07     ` Doug Anderson [this message]
2021-05-25  0:01 ` [PATCH v8 08/11] drm/bridge: ti-sn65dsi86: Promote the AUX channel to its own sub-dev Douglas Anderson
2021-06-06  4:40   ` Bjorn Andersson
2021-06-07 17:07     ` Doug Anderson
2021-05-25  0:01 ` [PATCH v8 09/11] drm/bridge: ti-sn65dsi86: Add support for the DP AUX bus Douglas Anderson
2021-05-25  0:01 ` [PATCH v8 10/11] drm/bridge: ti-sn65dsi86: Don't read EDID blob over DDC Douglas Anderson
2021-05-25  0:01 ` [PATCH v8 11/11] arm64: dts: qcom: sc7180-trogdor: Move panel under the bridge chip Douglas Anderson

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