From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 19858CD4F57 for ; Tue, 19 May 2026 10:40:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=eN6pL5kosuLFHDQOEEYHtqbm7sPqAq+GeT70rFRs0LQ=; b=0CoDXiQ+Jbispx841GSovsie1Z EVFiLolJ4Kl7k+Y1xSUClGHl+1awYhLGr3jbaIqPHkAytjJ15Vos4quXuYOHV6vIxW2qDemfFxnRp UgIvG2CVkATDMk/yvuzPiHENTawWJPYuRQqPF0JYoYXaAYt50U9rdaMd+kdVAeFyG72nktFCSLIIz zszJNc9QA7us1R4lXxJsJbuwaPQcK8hp8ASw1wR3G8sD/wzrWGNE76htTfDEn8tB7Cpy16/G231Bb 9scbQxoSEczs/WexLq2CO4EssdUP8wYL5KHc7p5K+ioLmd9qr1r7toYDBK1Pht0q9pG+sN2P4LZsH gMD0oDpg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wPHs1-000000019Pv-3ir8; Tue, 19 May 2026 10:40:17 +0000 Received: from smtpout-04.galae.net ([185.171.202.116]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wPHrp-000000019B0-2cFa for linux-arm-kernel@lists.infradead.org; Tue, 19 May 2026 10:40:07 +0000 Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-04.galae.net (Postfix) with ESMTPS id 2779BC2B9DB; Tue, 19 May 2026 10:40:57 +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 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260519_034005_853927_1FE90B2A X-CRM114-Status: GOOD ( 10.24 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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