linux-kernel - Re: [PATCH v4 05/11] drm: Add Allwinner A10 Display Engine support

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Message-ID: <20160428074059.GC17159@lukather>
Date:	Thu, 28 Apr 2016 09:40:59 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:	Mike Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	David Airlie <airlied@...ux.ie>, Chen-Yu Tsai <wens@...e.org>,
	Rob Herring <robh+dt@...nel.org>,
	Daniel Vetter <daniel@...ll.ch>,
	Hans de Goede <hdegoede@...hat.com>,
	devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-sunxi@...glegroups.com, dri-devel@...ts.freedesktop.org,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Alexander Kaplan <alex@...tthing.co>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH v4 05/11] drm: Add Allwinner A10 Display Engine support

Hi Boris,

On Tue, Apr 26, 2016 at 11:14:19AM +0200, Boris Brezillon wrote:
> Hi Maxime,
> 
> On Mon, 25 Apr 2016 15:22:46 +0200
> Maxime Ripard <maxime.ripard@...e-electrons.com> wrote:
> 
> > The Allwinner A10 and subsequent SoCs share the same display pipeline, with
> > variations in the number of controllers (1 or 2), or the presence or not of
> > some output (HDMI, TV, VGA) or not.
> > 
> > Add a driver with a limited set of features for now, and we will hopefully
> > support all of them eventually
> > 
> > Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
> 
> Just 2 comments below. Once addressed you can add my
> 
> Reviewed-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> 
> > ---
> 
> [...]
> 
> > +
> > +static int sun4i_drv_connector_plug_all(struct drm_device *drm)
> > +{
> > +	struct drm_connector *connector, *failed;
> > +	int ret;
> > +
> > +	mutex_lock(&drm->mode_config.mutex);
> > +	list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
> > +		ret = drm_connector_register(connector);
> > +		if (ret) {
> > +			failed = connector;
> > +			goto err;
> > +		}
> > +	}
> > +	mutex_unlock(&drm->mode_config.mutex);
> > +	return 0;
> > +
> > +err:
> > +	list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
> > +		if (failed == connector)
> > +			break;
> > +
> > +		drm_connector_unregister(connector);
> > +	}
> > +	mutex_unlock(&drm->mode_config.mutex);
> > +
> > +	return ret;
> > +}
> 
> You can use the generic drm_connector_register_all() to do that.
> 
> [...]
> 
> > +
> > +static void sun4i_drv_unbind(struct device *dev)
> > +{
> > +	struct drm_device *drm = dev_get_drvdata(dev);
> > +
> 
> And you probably miss a call to drm_connector_unregister_all() here.

Thanks, I'll fix that.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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