linux-kernel - Re: [PATCH v3 07/12] drm/bridge: ti-sn65dsi86: Remove extra call: drm_connector_update_edid

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Date:   Mon, 5 Apr 2021 04:01:53 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Douglas Anderson <dianders@...omium.org>
Cc:     Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Sam Ravnborg <sam@...nborg.org>,
        Linus W <linus.walleij@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        robdclark@...omium.org, Stephen Boyd <swboyd@...omium.org>,
        Steev Klimaszewski <steev@...i.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        linux-arm-msm@...r.kernel.org,
        Stanislav Lisovskiy <stanislav.lisovskiy@...el.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Robert Foss <robert.foss@...aro.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 07/12] drm/bridge: ti-sn65dsi86: Remove extra call:
 drm_connector_update_edid_property()

Hi Doug,

Thank you for the patch.

On Fri, Apr 02, 2021 at 03:28:41PM -0700, Douglas Anderson wrote:
> As of commit 5186421cbfe2 ("drm: Introduce epoch counter to
> drm_connector") the drm_get_edid() function calls
> drm_connector_update_edid_property() for us. There's no reason for us
> to call it again.
> 
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> Reviewed-by: Andrzej Hajda <a.hajda@...sung.com>

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

This looks like a widespread issue, would you be able to send a patch to
address all the other drivers ?

> ---
> 
> (no changes since v1)
> 
>  drivers/gpu/drm/bridge/ti-sn65dsi86.c | 11 ++++-------
>  1 file changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> index 51db30d573c1..6390bc58f29a 100644
> --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> @@ -270,7 +270,7 @@ static int ti_sn_bridge_connector_get_modes(struct drm_connector *connector)
>  {
>  	struct ti_sn_bridge *pdata = connector_to_ti_sn_bridge(connector);
>  	struct edid *edid = pdata->edid;
> -	int num, ret;
> +	int num;
>  
>  	if (!edid) {
>  		pm_runtime_get_sync(pdata->dev);
> @@ -279,12 +279,9 @@ static int ti_sn_bridge_connector_get_modes(struct drm_connector *connector)
>  	}
>  
>  	if (edid && drm_edid_is_valid(edid)) {
> -		ret = drm_connector_update_edid_property(connector, edid);
> -		if (!ret) {
> -			num = drm_add_edid_modes(connector, edid);
> -			if (num)
> -				return num;
> -		}
> +		num = drm_add_edid_modes(connector, edid);
> +		if (num)
> +			return num;
>  	}
>  
>  	return drm_panel_get_modes(pdata->panel, connector);

-- 
Regards,

Laurent Pinchart