linux-kernel - [PATCH 1/2] drm/bridge: adv7511: Allow IRQ to share GPIO pins

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Date: Wed, 28 Feb 2024 05:37:35 -0600
From: Adam Ford <aford173@...il.com>
To: dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org
Cc: aford@...conembedded.com,
	Adam Ford <aford173@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Andrzej Hajda <andrzej.hajda@...el.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Jonas Karlman <jonas@...boo.se>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] drm/bridge: adv7511:  Allow IRQ to share GPIO pins

The IRQ registration currently assumes that the GPIO is
dedicated to it, but that may not necessarily be the case.
If the board has another device sharing the IRQ, it won't be
registered and the hot-plug detect fails.  This is easily
fixed by add the IRQF_SHARED flag.

Signed-off-by: Adam Ford <aford173@...il.com>

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index b5518ff97165..21f08b2ae265 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -1318,7 +1318,8 @@ static int adv7511_probe(struct i2c_client *i2c)
 
 		ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
 						adv7511_irq_handler,
-						IRQF_ONESHOT, dev_name(dev),
+						IRQF_ONESHOT | IRQF_SHARED,
+						dev_name(dev),
 						adv7511);
 		if (ret)
 			goto err_unregister_audio;
-- 
2.43.0