From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 DF11D390C8A for ; Thu, 23 Apr 2026 10:18:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776939527; cv=none; b=aoxbLjg6gO00HmmY5+u+fPVZhwt/jBwAhvga2UatDy8kxbICanAa4fPQAq/VyTNh/CqBbM5GBbFvcux9L+0S8LHe8RI2Afegvbq3nao7riLWki1A0L49bOMJ5zYdXJB1rFisRZyIefKb7zHmffaN3CbCso1VJJU3S+AZQm3j1pU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776939527; c=relaxed/simple; bh=Nk4dOoFLxVzCJfJnsEvhWmANR87bE+u/Y8+lSXias/M=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=UsQPayNbEqamJ3+E50+duvAnfc3kaVblhyyXiDPtEiecXXRLxWpilwDJDhb+xDNSerliKby8x7SrNx9HFAtfpAXpnEwa8sxhzpK5YIXD+m9V/2fjgmpflEauwA7NaVrr6IzIGRJLszrr0IGjQKDSKKXMOKNEdlPOdAuT9tZUrCU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oaYlzyMY; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="oaYlzyMY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2CB5EC2BCAF; Thu, 23 Apr 2026 10:18:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776939527; bh=Nk4dOoFLxVzCJfJnsEvhWmANR87bE+u/Y8+lSXias/M=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=oaYlzyMYHWbUsqONqUGvdGTTO7y5uvmb7F8dVocMB8rv998E0AUHVevmTeU5XiTIx gQQpsB1mA9Jkh+orgtZK2E9LI4SBa9wddULoCJha8kNuMzm13z2rn+z25EM219TyeA 3QDW1uccTfOiQoPccjeX46hPqBtz1FfntAAHOda2czp3wCzzwgTjeb1S8PaWV/lsSW Z3wgcBfz2uqIgd4n3hw+fX+Im95Tn5JUU86Wfkk2p7buv6+1aduThMO5cSSInCvHdh qLD0amhxjT3Pe6uXVTFPXyAz0bGcjZo41ed+Vug7UgdzaxAjX1oowQ4sUSmiWjUXAy MysbHu/kjnC6A== From: Maxime Ripard Date: Thu, 23 Apr 2026 12:18:19 +0200 Subject: [PATCH v2 06/28] drm/bridge: Add drm_private_obj_is_bridge() 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: <20260423-drm-state-readout-v2-6-8549f87cb978@kernel.org> References: <20260423-drm-state-readout-v2-0-8549f87cb978@kernel.org> In-Reply-To: <20260423-drm-state-readout-v2-0-8549f87cb978@kernel.org> To: Maarten Lankhorst , Thomas Zimmermann , David Airlie , Simona Vetter , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Jyri Sarha , Tomi Valkeinen Cc: Devarsh Thakkar , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Maxime Ripard X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=2188; i=mripard@kernel.org; h=from:subject:message-id; bh=Nk4dOoFLxVzCJfJnsEvhWmANR87bE+u/Y8+lSXias/M=; b=owGbwMvMwCmsHn9OcpHtvjLG02pJDJkvP746s/7n2lv9/kqJOy6zWZ29XLZkwYHgfM7IeRYdX /5ElU9Z3jGVhUGYk0FWTJHliUzY6eXti6sc7Ff+gJnDygQyhIGLUwAmUnGHseG1akaG4P4q/rOx jfeFWlYruz7junV42Y7LD5kvZwgfi2z4nKib5qlWvHaPoQXH1qTpXowN86JnnTr7K3SXfdGnvMZ bc173u3TqC0XoLpFgqZLNS+xnmf950vS7ahsjD2xXl//Hee0HAA== X-Developer-Key: i=mripard@kernel.org; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D The SRO readout helpers need to distinguish bridge-backed private objects from other private objects, because bridges require special readout ordering through the encoder bridge chains. Add drm_private_obj_is_bridge() which checks whether a private object's funcs pointer matches the bridge private state funcs. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/drm_bridge.c | 15 +++++++++++++++ include/drm/drm_bridge.h | 2 ++ 2 files changed, 17 insertions(+) diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index 44d53906e4c5..5b8e171afbe5 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -512,10 +512,25 @@ static const struct drm_private_state_funcs drm_bridge_priv_state_funcs = { .atomic_create_state = drm_bridge_atomic_create_priv_state, .atomic_duplicate_state = drm_bridge_atomic_duplicate_priv_state, .atomic_destroy_state = drm_bridge_atomic_destroy_priv_state, }; +/** + * drm_private_obj_is_bridge - check if a private object backs a bridge + * @obj: private object to check + * + * RETURNS: + * + * True if @obj is the &drm_private_obj embedded in a &struct drm_bridge, + * false otherwise. + */ +bool drm_private_obj_is_bridge(struct drm_private_obj *obj) +{ + return obj->funcs && obj->funcs == &drm_bridge_priv_state_funcs; +} +EXPORT_SYMBOL(drm_private_obj_is_bridge); + static bool drm_bridge_is_atomic(struct drm_bridge *bridge) { return bridge->funcs->atomic_reset != NULL; } diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 84b5517726c1..425f3ca03d95 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -1285,10 +1285,12 @@ static inline struct drm_bridge * drm_priv_to_bridge(struct drm_private_obj *priv) { return container_of(priv, struct drm_bridge, base); } +bool drm_private_obj_is_bridge(struct drm_private_obj *obj); + bool drm_bridge_enter(struct drm_bridge *bridge, int *idx); void drm_bridge_exit(int idx); void drm_bridge_unplug(struct drm_bridge *bridge); struct drm_bridge *drm_bridge_get(struct drm_bridge *bridge); -- 2.53.0