From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 82B9C4EA363 for ; Tue, 19 May 2026 10:40:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779187206; cv=none; b=VVD30hT7o9zAl/FVtfDilnqPqR+xP8Ot1wf5NVbTkWeK7WfLZvm2BNR+FzzVyq0JZ3ZV25xTWSLmjYtF3gPiaxp65KKCMzbwY1cQGJVDQ3hRsUCY05o7WYhR8dSLiA90L87N4j3NteZqfK9BD9QAMT4yeDMEJ2+O4jrya9EuT0g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779187206; c=relaxed/simple; bh=PoYOaRghUOfWGLxaEbr2QA7/OZlcBeliMCvSSCN8B0I=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=I8OVcKVF/Gzxn/VzOYmDGQH9HoTlWVtjC0tozHwwRWf5oSg7wS7tq4KJYmg8QnrkpmdZcvTP6NxUlx8nVgXFKX4YFwdoIYrs5C/5H4JDlB2lRdRnVgET4sxvA1vVbK4OS29Vc0AGIZjFY1R3u7s6FmhEsI+gtnyzbmb5sFRRT0E= ARC-Authentication-Results:i=1; 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=gOj+U7Xa; arc=none smtp.client-ip=185.246.84.56 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="gOj+U7Xa" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id 28EA21A3629; Tue, 19 May 2026 10:40:04 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id EBB4D606E9; Tue, 19 May 2026 10:40:03 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id E7FCA107E8AFA; Tue, 19 May 2026 12:39:57 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1779187201; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=eN6pL5kosuLFHDQOEEYHtqbm7sPqAq+GeT70rFRs0LQ=; b=gOj+U7XaOXqqhRiCtqoWTExaKf57PI5lsbopBhQnoItip50VmAyxc5ehIE2oflvHG9ssjM SY2QhjswtmJaiFlXE2fcoiAAFVRNt/bNNH9qvjYCh44CZ5RZLyZUKi9NB00u1U1O4nIpmD 3fstKXeQ+gjFJKnvVqHhY/oaMSlQLlZ2oBMbR4i7XqsAmmzQhUBr+pPcDGm51TZd7JkdjC CpDEeniTkrfzAnRnE1usFaMKGot0iD0zkjzV/t3LPdDRpBXqktYjQfa7VpDWAwu2tuUfDl K0WM4fjVBfEuLNN+5YCy564YQaejBvOokM+sigsyWrvjry5asQGLnJMiJazsuQ== From: Luca Ceresoli Date: Tue, 19 May 2026 12:37:44 +0200 Subject: [PATCH 27/37] drm/bridge: notify about detached bridges 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: 7bit Message-Id: <20260519-drm-bridge-hotplug-v1-27-45e2bdb3dfb4@bootlin.com> References: <20260519-drm-bridge-hotplug-v1-0-45e2bdb3dfb4@bootlin.com> In-Reply-To: <20260519-drm-bridge-hotplug-v1-0-45e2bdb3dfb4@bootlin.com> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Inki Dae , Jagan Teki , Marek Szyprowski , Marek Vasut , Stefan Agner , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Cc: Hui Pu , Ian Ray , Thomas Petazzoni , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Luca Ceresoli X-Mailer: b4 0.15.2 X-Last-TLS-Session-Version: TLSv1.3 In preparation to support DRM bridge hotplug, let the drm_bridge code emit an event when a bridge is detached, so that this event can trigger the actions needed to deconfigure the pipeline and unregister the connector as appropriate. Signed-off-by: Luca Ceresoli --- drivers/gpu/drm/Kconfig | 1 + drivers/gpu/drm/drm_bridge.c | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 18eb33e0e5a0..081660f3a0f2 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -17,6 +17,7 @@ menuconfig DRM # device and dmabuf fd. Let's make sure that is available for our userspace. select KCMP select VIDEO + select DRM_EVENT_NOTIFIER help Kernel-level support for the Direct Rendering Infrastructure (DRI) introduced in XFree86 4.0. If you say Y here, you need to select diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index d45fb74ec8c2..c62d17e84d4f 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -34,6 +34,7 @@ #include #include #include +#include #include #include #include @@ -638,6 +639,9 @@ void drm_bridge_detach(struct drm_bridge *bridge) bridge->funcs->detach(bridge); list_del_init(&bridge->chain_node); + + drm_event_notifier_notify(DRM_BRIDGE_DETACHED, bridge); + bridge->dev = NULL; drm_bridge_put(bridge); } -- 2.54.0