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Mon, 08 Dec 2025 08:17:00 -0800 (PST) Received: from vovchkir.localdomain ([95.161.223.42]) by smtp.googlemail.com with ESMTPSA id 2adb3069b0e04-598e902b43esm4148e87.92.2025.12.08.08.16.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Dec 2025 08:16:59 -0800 (PST) From: Vladimir Yakovlev To: Dmitry Baryshkov Cc: Vladimir Yakovlev , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/bridge: lontium-lt9611uxc: use reset_gpio as optional parameter Date: Mon, 8 Dec 2025 19:16:57 +0300 Message-Id: <20251208161657.3763370-1-vovchkir@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" On some systems the reset pin may not be used. Signed-off-by: Vladimir Yakovlev --- drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/b= ridge/lontium-lt9611uxc.c index d3ce5dd30420..3868ad05e011 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c @@ -179,6 +179,9 @@ static void lt9611uxc_hpd_work(struct work_struct *work) =20 static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc) { + if (!lt9611uxc->reset_gpio) + return; + gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1); msleep(20); =20 @@ -455,7 +458,7 @@ static int lt9611uxc_gpio_init(struct lt9611uxc *lt9611= uxc) { struct device *dev =3D lt9611uxc->dev; =20 - lt9611uxc->reset_gpio =3D devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + lt9611uxc->reset_gpio =3D devm_gpiod_get_optional(dev, "reset", GPIOD_OUT= _HIGH); if (IS_ERR(lt9611uxc->reset_gpio)) { dev_err(dev, "failed to acquire reset gpio\n"); return PTR_ERR(lt9611uxc->reset_gpio); --=20 2.34.1