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smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=O2wjBsBM; arc=none smtp.client-ip=217.70.183.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="O2wjBsBM" Received: by mail.gandi.net (Postfix) with ESMTPSA id 93A08432D1; Fri, 20 Jun 2025 16:00:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1750435203; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jxqhpgNdN8sprPi5Np5GP4NDa3E4dF18OFdVOGJkQuA=; b=O2wjBsBML0hngmIxbAkAbtl8Nhpj9p19JDsbosQ095/NpYWRH0LuyCtAyjH+OUwoibXmhX vX7bqD3SflSpUZIpBivIYrhVq7rwUa68XYQGkeui2DupS1lbAOvtsiCxpa0b0Zcc0DnzuG moHPvAFrg2jeqVx5mqkwX6l1Gqnv5Kzi04OWIjiVzXP6hdHnISp/nBEWN9HIUY63XEXflP lsvmRWBU3ttY/KE5L5dbPtf+/JIjMYGqcLqo4PCjilhYXUeeXC89ilK9/cA9OEO9MO8FUj BzJXb/hiCbhKkajGeqxhZkO3qEyZWbRd44TODnou5tJRTCi0I9DW31zfAmInhA== From: Luca Ceresoli Date: Fri, 20 Jun 2025 17:59:53 +0200 Subject: [PATCH v9 1/3] drm/bridge: get/put the bridge reference in drm_bridge_add/remove() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250620-drm-bridge-alloc-getput-drm-bridge-c-v9-1-ca53372c9a84@bootlin.com> References: <20250620-drm-bridge-alloc-getput-drm-bridge-c-v9-0-ca53372c9a84@bootlin.com> In-Reply-To: <20250620-drm-bridge-alloc-getput-drm-bridge-c-v9-0-ca53372c9a84@bootlin.com> To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: Dmitry Baryshkov , Anusha Srivatsa , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Hui Pu , Thomas Petazzoni , Luca Ceresoli X-Mailer: b4 0.14.2 X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddvgdekkedvucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepnfhutggrucevvghrvghsohhlihcuoehluhgtrgdrtggvrhgvshholhhisegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeeiieeuvdfftefgueduleehueetgffgjeeitedtteetkeeuueeuueekveevvdeuveenucfkphepvdgrtddvmeeijedtmedvtddvtdemvggrtddumegsvgegudemleehvgejmeefgeefmeeludefvgenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpedvrgdtvdemieejtdemvddtvddtmegvrgdtudemsggvgedumeelhegvjeemfeegfeemledufegvpdhhvghloheplgduledvrdduieekrddujeekrdejhegnpdhmrghilhhfrhhomheplhhutggrrdgtvghrvghsohhlihessghoohhtlhhinhdrtghomhdpnhgspghrtghpthhtohepudekpdhrtghpthhtohepthiiihhmmhgvrhhmrghnnhesshhushgvrdguvgdprhgtphhtthhopehthhhomhgrshdrphgvthgriiiiohhnihessghoohhtlhhinhdrtghomhdprhgtphhtthhopehmrggrrhhtvghnrdhlrghnkhhhohhrshhtsehlihhnuhigrdhin hhtvghlrdgtohhmpdhrtghpthhtohepughrihdquggvvhgvlheslhhishhtshdrfhhrvggvuggvshhkthhophdrohhrghdprhgtphhtthhopefjuhhirdfruhesghgvhhgvrghlthhhtggrrhgvrdgtohhmpdhrtghpthhtohepnfgruhhrvghnthdrphhinhgthhgrrhhtsehiuggvrghsohhnsghorghrugdrtghomhdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopegrshhrihhvrghtshesrhgvughhrghtrdgtohhm X-GND-Sasl: luca.ceresoli@bootlin.com drm_bridge_add() adds the bridge to the global bridge_list, so take a reference for that. Vice versa in drm_bridge_remove(). Reviewed-by: Maxime Ripard Signed-off-by: Luca Ceresoli --- Changes in v9: none Changes in v8: none Changes in v7: - in v6 this was part of "drm/bridge: add support for refcounted DRM bridges", now split to a separate patch --- drivers/gpu/drm/drm_bridge.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index d6ce7b4c019f415400bab8aa3d032638cba6cdc5..fa2b2457b16e145e3ace70c5398= 4937096d310d0 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -295,6 +295,8 @@ EXPORT_SYMBOL(__devm_drm_bridge_alloc); */ void drm_bridge_add(struct drm_bridge *bridge) { + drm_bridge_get(bridge); + mutex_init(&bridge->hpd_mutex); =20 if (bridge->ops & DRM_BRIDGE_OP_HDMI) @@ -342,6 +344,8 @@ void drm_bridge_remove(struct drm_bridge *bridge) mutex_unlock(&bridge_lock); =20 mutex_destroy(&bridge->hpd_mutex); + + drm_bridge_put(bridge); } EXPORT_SYMBOL(drm_bridge_remove); =20 --=20 2.49.0