Re: [PATCH 3/3] drm/bridge: ti-sn65dsi8: Make enable GPIO optional

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Alexander Stein <alexander.stein@ew.tq-group.com>
Cc: David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Rob Herring <robh+dt@kernel.org>,
	Andrzej Hajda <a.hajda@samsung.com>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Robert Foss <robert.foss@linaro.org>,
	Jonas Karlman <jonas@kwiboo.se>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org
Subject: Re: [PATCH 3/3] drm/bridge: ti-sn65dsi8: Make enable GPIO optional
Date: Wed, 6 Oct 2021 12:18:33 +0300	[thread overview]
Message-ID: <YV1p6QFEkfTWssVD@pendragon.ideasonboard.com> (raw)
In-Reply-To: <YV1pyAq8CeiTO7hD@pendragon.ideasonboard.com>

On Wed, Oct 06, 2021 at 12:18:02PM +0300, Laurent Pinchart wrote:
> Hi Alexander,
> 
> Thank you for the patch.

One more thing, the subject line has a typo, it should read
ti-sn65dsi83.

> On Wed, Oct 06, 2021 at 09:47:13AM +0200, Alexander Stein wrote:
> > The enable signal may not be controllable by the kernel. Make it
> > optional.
> > This is a similar to commit bbda1704fc15 ("drm/bridge: ti-sn65dsi86: Make
> > enable GPIO optional")
> > 
> > Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
> > ---
> >  drivers/gpu/drm/bridge/ti-sn65dsi83.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> > index 5fab0fabcd15..101da29ba698 100644
> > --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> > +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> > @@ -679,7 +679,7 @@ static int sn65dsi83_probe(struct i2c_client *client,
> >  		model = id->driver_data;
> >  	}
> >  
> > -	ctx->enable_gpio = devm_gpiod_get(ctx->dev, "enable", GPIOD_OUT_LOW);
> > +	ctx->enable_gpio = devm_gpiod_get_optional(ctx->dev, "enable", GPIOD_OUT_LOW);
> 
> You can wrap this line as
> 
> 	ctx->enable_gpio = devm_gpiod_get_optional(ctx->dev, "enable",
> 						   GPIOD_OUT_LOW);
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> 
> Corresponding DT bindings changes are needed, I've sent a patch in this
> mail thread.
> 
> >  	if (IS_ERR(ctx->enable_gpio))
> >  		return PTR_ERR(ctx->enable_gpio);
> >  

-- 
Regards,

Laurent Pinchart