linux-kernel - Re: [PATCH 06/11] drm/bridge: ti-tfp410: switch to using fwnode_gpiod_get

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Message-ID: <20190920231228.GH12672@pendragon.ideasonboard.com>
Date:   Sat, 21 Sep 2019 02:12:28 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        Andrzej Hajda <a.hajda@...sung.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Jonas Karlman <jonas@...boo.se>,
        Neil Armstrong <narmstrong@...libre.com>,
        dri-devel@...ts.freedesktop.org,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Subject: Re: [PATCH 06/11] drm/bridge: ti-tfp410: switch to using
 fwnode_gpiod_get_index()

Hi Dmitry,

(CC'ing Heikki as the original author of software nodes support)

Thank you for the patch.

On Wed, Sep 11, 2019 at 12:52:10AM -0700, Dmitry Torokhov wrote:
> Instead of fwnode_get_named_gpiod() that I plan to hide away, let's use
> the new fwnode_gpiod_get_index() that mimics gpiod_get_index(), bit

s/bit/but/

> works with arbitrary firmware node.
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

On a side note, as I'm not very familiar with software nodes, I tried to
see how they are to be used, and it seems they are completely
undocumented :-( Heikki, is this something that could be fixed ?

> ---
> 
>  drivers/gpu/drm/bridge/ti-tfp410.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
> index 61cc2354ef1b..d9c9c9ebad2b 100644
> --- a/drivers/gpu/drm/bridge/ti-tfp410.c
> +++ b/drivers/gpu/drm/bridge/ti-tfp410.c
> @@ -284,8 +284,8 @@ static int tfp410_get_connector_properties(struct tfp410 *dvi)
>  	else
>  		dvi->connector_type = DRM_MODE_CONNECTOR_DVID;
>  
> -	dvi->hpd = fwnode_get_named_gpiod(&connector_node->fwnode,
> -					"hpd-gpios", 0, GPIOD_IN, "hpd");
> +	dvi->hpd = fwnode_gpiod_get_index(&connector_node->fwnode,
> +					  "hpd", 0, GPIOD_IN, "hpd");
>  	if (IS_ERR(dvi->hpd)) {
>  		ret = PTR_ERR(dvi->hpd);
>  		dvi->hpd = NULL;

-- 
Regards,

Laurent Pinchart