linux-kernel - [PATCH v2 11/16] drm/panel/sti: Keep up with refcounting

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Message-Id: <20250619-b4-of_drm_find_panel_part1-v2-11-0df94aecc43d@redhat.com>
Date: Thu, 19 Jun 2025 14:16:03 -0500
From: Anusha Srivatsa <asrivats@...hat.com>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <jessica.zhang@....qualcomm.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Inki Dae <inki.dae@...sung.com>, Jagan Teki <jagan@...rulasolutions.com>, 
 Marek Szyprowski <m.szyprowski@...sung.com>, 
 Andrzej Hajda <andrzej.hajda@...el.com>, Robert Foss <rfoss@...nel.org>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Chen-Yu Tsai <wens@...e.org>, Samuel Holland <samuel@...lland.org>, 
 Seung-Woo Kim <sw0312.kim@...sung.com>, 
 Kyungmin Park <kyungmin.park@...sung.com>, 
 Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, 
 Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>, 
 Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>, 
 Kieran Bingham <kieran.bingham+renesas@...asonboard.com>, 
 Geert Uytterhoeven <geert+renesas@...der.be>, 
 Magnus Damm <magnus.damm@...il.com>, Biju Das <biju.das.jz@...renesas.com>, 
 Tomi Valkeinen <tomi.valkeinen@...asonboard.com>, 
 Alain Volmat <alain.volmat@...s.st.com>, 
 Raphael Gallais-Pou <rgallaispou@...il.com>, Stefan Agner <stefan@...er.ch>, 
 Alison Wang <alison.wang@....com>, Linus Walleij <linus.walleij@...aro.org>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Mikko Perttunen <mperttunen@...dia.com>, 
 Jonathan Hunter <jonathanh@...dia.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev, 
 linux-samsung-soc@...r.kernel.org, linux-renesas-soc@...r.kernel.org, 
 linux-tegra@...r.kernel.org, Anusha Srivatsa <asrivats@...hat.com>
Subject: [PATCH v2 11/16] drm/panel/sti: Keep up with refcounting

Put the reference of the panel returned by
of_drm_find_panel() in the disable() function
after which panel won't be used.

Patch added in v2.

Signed-off-by: Anusha Srivatsa <asrivats@...hat.com>
---
 drivers/gpu/drm/sti/sti_dvo.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/sti/sti_dvo.c b/drivers/gpu/drm/sti/sti_dvo.c
index 7484d3c3f4ed5fac7eab408e30cbe2f6b87f27e5..11684279320a0e4b15fe761bdf6782cc24e8be96 100644
--- a/drivers/gpu/drm/sti/sti_dvo.c
+++ b/drivers/gpu/drm/sti/sti_dvo.c
@@ -225,6 +225,8 @@ static void sti_dvo_disable(struct drm_bridge *bridge)
 
 	drm_panel_disable(dvo->panel);
 
+	drm_panel_put(dvo->panel);
+
 	/* Disable/unprepare dvo clock */
 	clk_disable_unprepare(dvo->clk_pix);
 	clk_disable_unprepare(dvo->clk);

-- 
2.48.1