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 B1F52CD5BA9 for ; Tue, 19 May 2026 10:40:25 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0B49910EC44; Tue, 19 May 2026 10:40:25 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=bootlin.com header.i=@bootlin.com header.b="WBwRoQB2"; dkim-atps=neutral Received: from smtpout-04.galae.net (smtpout-04.galae.net [185.171.202.116]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2AB4C10EC44 for ; Tue, 19 May 2026 10:40:23 +0000 (UTC) Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-04.galae.net (Postfix) with ESMTPS id B5536C2B9DB; Tue, 19 May 2026 10:41:14 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 89DB0606E9; Tue, 19 May 2026 10:40:21 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 00428107E8AE7; Tue, 19 May 2026 12:40:15 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1779187219; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=+x/+hMZvd/mY+TDvxza1mQa1Krz1zW9d6N4aDdm3aVo=; b=WBwRoQB2t0CAFsznoKOix9Z+FB3ieKpmwoYJe2twTcy+zrteCXP0AgYjTvwyQ+qDJGu2wT L+fP1EFHkAMtjbPmdXt46zuZ4zim0qERMoM26egm1+ZR1WickXPEDb7WpmX5Y0osWAGXEA aciEyB09WzQnr72p76ZOvtoLlwBrEm+havQfRZotfkG8ZsG4e3W65g78XPYvujZfM1Crmh ATBR9qXlaUAQzz/RVbLkX1fslGsbSyFntJRvKnyVmMMoK3aXEaAds3eP/f1aNFxrVTY/P5 I2yAzeW0APKtbE77qMXAugpfEEhtpa+DzGyyNjtLeqzheYIc+a3SyDHHfzkC1w== From: Luca Ceresoli Date: Tue, 19 May 2026 12:37:48 +0200 Subject: [PATCH 31/37] drm/bridge: panel: implement .is_tail MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260519-drm-bridge-hotplug-v1-31-45e2bdb3dfb4@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/panel.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c index 4978ec98a082..102f987b1235 100644 --- a/drivers/gpu/drm/bridge/panel.c +++ b/drivers/gpu/drm/bridge/panel.c @@ -58,6 +58,11 @@ static const struct drm_connector_funcs panel_bridge_connector_funcs = { .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; +static bool panel_bridge_is_tail(struct drm_bridge *bridge) +{ + return true; +} + static int panel_bridge_attach(struct drm_bridge *bridge, struct drm_encoder *encoder, enum drm_bridge_attach_flags flags) @@ -206,6 +211,7 @@ static void panel_bridge_debugfs_init(struct drm_bridge *bridge, } static const struct drm_bridge_funcs panel_bridge_bridge_funcs = { + .is_tail = panel_bridge_is_tail, .attach = panel_bridge_attach, .detach = panel_bridge_detach, .atomic_pre_enable = panel_bridge_atomic_pre_enable, @@ -297,7 +303,7 @@ struct drm_bridge *drm_panel_bridge_add_typed(struct drm_panel *panel, panel_bridge->panel = panel; panel_bridge->bridge.of_node = panel->dev->of_node; - panel_bridge->bridge.ops = DRM_BRIDGE_OP_MODES; + panel_bridge->bridge.ops = DRM_BRIDGE_OP_MODES | DRM_BRIDGE_OP_IS_TAIL; panel_bridge->bridge.type = connector_type; panel_bridge->bridge.pre_enable_prev_first = panel->prepare_prev_first; -- 2.54.0