linux-kernel - [PATCH v4 14/15] drm/panel-edp: Don't re-read the EDID every time we power off the panel

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Date:   Thu,  9 Sep 2021 14:00:30 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Thierry Reding <thierry.reding@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Sam Ravnborg <sam@...nborg.org>
Cc:     devicetree@...r.kernel.org, Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Linus W <linus.walleij@...aro.org>,
        Daniel Vetter <daniel@...ll.ch>, linux-arm-msm@...r.kernel.org,
        Steev Klimaszewski <steev@...i.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org,
        Douglas Anderson <dianders@...omium.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 14/15] drm/panel-edp: Don't re-read the EDID every time we power off the panel

The simple-panel driver is for panels that are not hot-pluggable at
runtime. Let's keep our cached EDID around until driver unload.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
Acked-by: Sam Ravnborg <sam@...nborg.org>
---

Changes in v4:
- panel-simple-edp => panel-edp

Changes in v3:
- ("Don't re-read the EDID every time") moved to eDP only patch.

 drivers/gpu/drm/panel/panel-edp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index a83ef9905ea7..817c60858ef8 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -362,9 +362,6 @@ static int panel_edp_suspend(struct device *dev)
 	regulator_disable(p->supply);
 	p->unprepared_time = ktime_get();
 
-	kfree(p->edid);
-	p->edid = NULL;
-
 	return 0;
 }
 
@@ -758,6 +755,9 @@ static int panel_edp_remove(struct device *dev)
 	if (panel->ddc && (!panel->aux || panel->ddc != &panel->aux->ddc))
 		put_device(&panel->ddc->dev);
 
+	kfree(panel->edid);
+	panel->edid = NULL;
+
 	return 0;
 }
 
-- 
2.33.0.309.g3052b89438-goog