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 027F2378D8C for ; Thu, 23 Apr 2026 10:07:35 +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=1776938856; cv=none; b=t7S4zPejB0GofQLUUCiN8iX17HaO39Ze53tZSCmE6hp+IEC9WAH8bRmRxtnHQi/6B0Y6nEjGria2tYXFn6DyjIa5aoqBP4XE6d+zMpYTHJNxvi21SaU9o4Zx0AxV9mOnRgYRhKGYpzXrLzq05iBfiz0S8cAXJgwcARkfukEk6yU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776938856; 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=BtZET8KprEwSmq+4ZK+w/X6paBnButvgbYk4WpiHSKBW85ikxn6AZP1Gg1b4tWTtzIsLvQxev7qQgm7+shFdNux7vRrqyGNePUgD8cmwUz+P18XfB8TKA1ilo8HaEDvVX9ubf8jkHoHveAucgeNMcmf5eOZyVPIHb5OBtzppI5g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IH7QRsW2; 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="IH7QRsW2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B6CEC2BCB2; Thu, 23 Apr 2026 10:07:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776938855; bh=Nk4dOoFLxVzCJfJnsEvhWmANR87bE+u/Y8+lSXias/M=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=IH7QRsW2iPktlk0aAJ26icdTmfn9rbpfmSv4f193ejl68bze6myifCHv+7fdN/lCC gVAKwJZNWlohD27z9chC3ZPPvWb9kSGfeQ3kYJmB0aUhc8iiszQo0tny6CdltWOtBC smMElO6cNtyr6keJfsovq5aKFNg6DpWdXmmqiEokbrdppN2pXaKwntcHqKyon5AfOH hmYPdE3LLhXnaib8M3BD0uM71XX1iQiWu6hNSGNcBHrjmXEg5sgb1xs0yWk1ryNLV8 DOJH9AkGuBB+LCdW8+DfY0VAx1JUHo0RJlRjenlLF5cgQnlz7YGdsCVzm5x2YKu7lH /HgQowhloHYXA== From: Maxime Ripard Date: Thu, 23 Apr 2026 12:06:44 +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-v2-6-6cde1a9910ed@kernel.org> References: <20260423-drm-state-readout-v2-0-6cde1a9910ed@kernel.org> In-Reply-To: <20260423-drm-state-readout-v2-0-6cde1a9910ed@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=owGbwMvMwCmsHn9OcpHtvjLG02pJDJkv33vuP7q/cl1u/ZUrPVKHOhdrMjlPUKyRnBu+U2yu7 oO+M780O6ayMAhzMsiKKbI8kQk7vbx9cZWD/cofMHNYmUCGMHBxCsBEDlxmrK8oV5f2CZdRzhCx fBSiIDb9f2+NvOfLEzcfHj1Z7PXum8l1jlJWu8AoljNn0ybvMF9wnbE+Tqxz30Qx0yUni0W5NOz 8e45eerZHlEfN/0T0Ves1JwMb1i672vVAReZXQX6whPLxmY8B 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