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 1CF6ECD5BA6 for ; Tue, 19 May 2026 10:40:52 +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=31ncBWdHqHsdjEKSp4vtUwOjKggaE/FUwi7+sB64GTA=; b=ZWzw1Z4isdMXx1CKVZzFCWZ4nI 6qSiimycxmMaFahtDVq+osy86Ear+9C4uCdCrsT+eMmkIyPtRZS8wa/Yvl7fyAp3ExRS3xujMPX9P QsmvYBt8RMgkN+rNe7t3Uba4S3vpAqqfwXzFZ+0vqtMcostvvpchNLRJr5uvz78ij0aUeANGyfm+h p6jqNch6Rj+XdmSCUzvazjnGKaO9yIJDB4wL50Nr4QR6BycARCImyLZIxg3ByI2S6ThK7FkIrtjq5 22TPv0zX4YL1lsx+j+lRsIyKCmQHwee1gQ09SliaFWCO9R2hPn8nXOqizOwJw0URtNlNlTypnHd/n XzVcNuIw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wPHsS-00000001A1A-3y57; Tue, 19 May 2026 10:40:44 +0000 Received: from smtpout-03.galae.net ([185.246.85.4]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wPHsG-000000019j8-2H9s for linux-arm-kernel@lists.infradead.org; Tue, 19 May 2026 10:40:37 +0000 Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id EDF7C4E42CF4; Tue, 19 May 2026 10:40:30 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id C19AB606E9; Tue, 19 May 2026 10:40:30 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 5BEFB107E8AF0; Tue, 19 May 2026 12:40:25 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1779187229; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=31ncBWdHqHsdjEKSp4vtUwOjKggaE/FUwi7+sB64GTA=; b=MWJTDn5rArD4HU8/88qXnibhNRKlApYd92dhmLobr0VRJBSg9i4Nmt6jrwGXpugMvv5OmY TpUfO/dBOabgxWRFrU/10zDCAXFxbLEZqFMDOe9SMZ+IWfixPQSIzlnfZPdcq/IlO/VGIr dFET0eus81/DZyOLH05lag+6WmQfcgQnsk9qalj79k6mddr5R/6pKyUA6GZXb+BAR3V3S1 23cN1nXngjKQfI+YmsdZ5lezoxal0KuUEipbhLwhHbrw/NnM5TGhNO3cytPQaGQ/MYB3KT wOl5qttM4Y1u2RSkUny+veut8wkeTbVCYw/TqNDZb1xMDLD4atb2o1XR1eJ69A== From: Luca Ceresoli Date: Tue, 19 May 2026 12:37:50 +0200 Subject: [PATCH 33/37] drm/bridge: samsung-dsim: implement .is_tail MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260519-drm-bridge-hotplug-v1-33-45e2bdb3dfb4@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_034032_752412_23F64334 X-CRM114-Status: UNSURE ( 9.66 ) X-CRM114-Notice: Please train this message. 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 This bridge is never a tail bridge, i.e. it always 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/samsung-dsim.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c index 3c70a45c5dce..55f4b0f16ade 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -1716,6 +1716,11 @@ static const u32 samsung_dsim_pixel_output_fmts[] = { MEDIA_BUS_FMT_RGB888_1X24, }; +static bool samsung_dsim_is_tail(struct drm_bridge *bridge) +{ + return false; +} + static bool samsung_dsim_pixel_output_fmt_supported(u32 fmt) { int i; @@ -1836,6 +1841,7 @@ static int samsung_dsim_attach(struct drm_bridge *bridge, } static const struct drm_bridge_funcs samsung_dsim_bridge_funcs = { + .is_tail = samsung_dsim_is_tail, .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, .atomic_reset = drm_atomic_helper_bridge_reset, @@ -2225,6 +2231,7 @@ int samsung_dsim_probe(struct platform_device *pdev) pm_runtime_enable(dev); + dsi->bridge.ops = DRM_BRIDGE_OP_IS_TAIL; dsi->bridge.of_node = dev->of_node; dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; -- 2.54.0