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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 91733CD4F57 for ; Tue, 19 May 2026 10:40:29 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E88C810EC45; Tue, 19 May 2026 10:40:28 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=bootlin.com header.i=@bootlin.com header.b="T2N7PCEV"; dkim-atps=neutral Received: from smtpout-03.galae.net (smtpout-03.galae.net [185.246.85.4]) by gabe.freedesktop.org (Postfix) with ESMTPS id C604310EC45 for ; Tue, 19 May 2026 10:40:27 +0000 (UTC) Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id A93344E42CF3; Tue, 19 May 2026 10:40:26 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 7D843606E9; Tue, 19 May 2026 10:40:26 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 48445107E8B03; Tue, 19 May 2026 12:40:19 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1779187224; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=oaDZzNhhlsYfML//xOFG6wXWu65nBogs+zUTIz1RF5A=; b=T2N7PCEVTYuTIU/5aFtL7cpuaWtxZfffb3xfVtA1+0l/280seqzJHH8z3a/bdTY6qX2Phx oKG+/QhlBnQZfNJ5rX3rGKFbSn7vXUx8uBPdiqPsUIzfFuR65GWIaKc3hmcSTOnTBVeIRz xG9jrGkyD223AxSEW2TUMqu6WQ0Geb/xr4X6CLxuEg30pGGb8heXHi704vaN+dRhDREnGy x0KKbq7d/YONoI+Qan9EJ+f6kSQLIqfh55AxPUD7mqrRY8eCBQ0RkCLOZL2VoSJdRsQfXB xSFH5qg0P3s3x9Js61QcoCHSCkAataRa3DRieMQtzs1d/4s1hARFu47Y9jrYXA== From: Luca Ceresoli Date: Tue, 19 May 2026 12:37:49 +0200 Subject: [PATCH 32/37] drm/bridge: display-connector: implement .is_tail MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260519-drm-bridge-hotplug-v1-32-45e2bdb3dfb4@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-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This bridge is always a tail bridge, i.e. it never needs a following bridge to complete the pipeline. Add a is_tail func to expose this. Signed-off-by: Luca Ceresoli --- drivers/gpu/drm/bridge/display-connector.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c index 16c0631adeb1..1c8111bdc89e 100644 --- a/drivers/gpu/drm/bridge/display-connector.c +++ b/drivers/gpu/drm/bridge/display-connector.c @@ -33,6 +33,11 @@ to_display_connector(struct drm_bridge *bridge) return container_of(bridge, struct display_connector, bridge); } +static bool display_connector_is_tail(struct drm_bridge *bridge) +{ + return true; +} + static int display_connector_attach(struct drm_bridge *bridge, struct drm_encoder *encoder, enum drm_bridge_attach_flags flags) @@ -176,6 +181,7 @@ static u32 *display_connector_get_input_bus_fmts(struct drm_bridge *bridge, } static const struct drm_bridge_funcs display_connector_bridge_funcs = { + .is_tail = display_connector_is_tail, .attach = display_connector_attach, .detect = display_connector_bridge_detect, .edid_read = display_connector_edid_read, @@ -370,6 +376,7 @@ static int display_connector_probe(struct platform_device *pdev) conn->bridge.of_node = pdev->dev.of_node; + conn->bridge.ops = DRM_BRIDGE_OP_IS_TAIL; if (conn->bridge.ddc) conn->bridge.ops |= DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_DETECT; -- 2.54.0