From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-m19731101.qiye.163.com (mail-m19731101.qiye.163.com [220.197.31.101]) (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 B2CB938E8BE; Tue, 7 Jul 2026 09:50:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.101 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783417826; cv=none; b=ViT5eT/orgTDv+QHyHjQCgv9Nvgrz3LSzc8aSBdfBXThg0Ypjwv5fPff+YtmI52BYcHpZv6xDuFmIjC7/EY9mFSvKsOhf4ZLqwJw7xt7OfTggnGIiF38szztwBA43w5qak7eCrvMPvoozL/8Pb2j3kWDFyRIk8n18PfXV8U4SSg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783417826; c=relaxed/simple; bh=fZY2VfwpUrOebJigA2IRc7ysHmsW/LOXngQD4fE5axk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=bYFLXgQPLjO1V78iLVLmnT4R7wK68ps81UHCX67ozTcShXmIWwoYSjEtqPH2Kq8UPOwDr/42ntFu6eZKlSpRuSkGhV8ewVNk9RI2qWsMxDcmxqAc9scIAfLoLqkq6LfnhMSJR5eFwuuG0zszQKDnOD8nNlBDBaztBe1C2FV/d58= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rock-chips.com; spf=pass smtp.mailfrom=rock-chips.com; dkim=pass (1024-bit key) header.d=rock-chips.com header.i=@rock-chips.com header.b=JwntmWVE; arc=none smtp.client-ip=220.197.31.101 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rock-chips.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rock-chips.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=rock-chips.com header.i=@rock-chips.com header.b="JwntmWVE" Received: from zyb-HP-ProDesk-680-G2-MT.. (unknown [61.154.14.86]) by smtp.qiye.163.com (Hmail) with ESMTP id 452ef5835; Tue, 7 Jul 2026 12:07:21 +0800 (GMT+08:00) From: Damon Ding To: Andrzej Hajda , Neil Armstrong , Robert Foss , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sandy Huang , =?UTF-8?q?Heiko=20St=C3=BCbner?= , Andy Yan Cc: Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Dmitry Baryshkov , Marek Szyprowski , Sebastian Reichel , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Damon Ding Subject: [PATCH v6 4/5] drm/bridge: analogix_dp: Add validation for samsung,lane-count property Date: Tue, 7 Jul 2026 12:06:12 +0800 Message-Id: <20260707040613.1992841-5-damon.ding@rock-chips.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260707040613.1992841-1-damon.ding@rock-chips.com> References: <20260707040613.1992841-1-damon.ding@rock-chips.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-HM-Tid: 0a9f3ac252f803a8kunme8126cdf5bc93 X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVkZShgdVkpNGB1CTR9PGk4eGlYVFA kWGhdVEwETFhoSFyQUDg9ZV1kYEgtZQVlNSlVKTk9VSk9VQ01ZV1kWGg8SFR0UWUFZT0tIVUpLSU 9PT0hVSktLVUpCS0tZBg++ DKIM-Signature: a=rsa-sha256; b=JwntmWVEzE0km0fKlwwuBXTmVIBySdS3xIweWHDatGW3zFxSisx9q3RR9d0aAUe+rIQ6X86CzuuI5XqIqGNUhK4ajBncMUH7Hpqc9Ye9ZogsdLUQp674NmB0yNBBRImiiEJx5buqKGkraIyyJ058paMbUdtJOnFz/uP+gNkMXaQ=; c=relaxed/relaxed; s=default; d=rock-chips.com; v=1; bh=mLPv+VMsVdg/2ajzDFl3mJXUyg4DWZyAqc2dUZvsmmw=; h=date:mime-version:subject:message-id:from; Add validity check for samsung,lane-count to ensure DT-provided lane count values are specification-compliant. Suggested-by: Luca Ceresoli Signed-off-by: Damon Ding --- Changes in v5: - Apply DRM DP helper API to check the validity of DP lane count. Changes in v6: - Rebase after the new commit for restoring mandatory properties samsung,link-rate and samsung,lane-count. --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 5240efcd3861..039e076d2b8a 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1270,7 +1270,8 @@ static int analogix_dp_dt_parse_pdata(struct analogix_dp_device *dp) return dev_err_probe(dp->dev, -EINVAL, "Failed to get samsung,link-rate\n"); video_info->max_link_rate = val; - if (of_property_read_u32(dp_node, "samsung,lane-count", &val)) + if (of_property_read_u32(dp_node, "samsung,lane-count", &val) || + !drm_dp_lane_count_is_valid(val)) return dev_err_probe(dp->dev, -EINVAL, "Failed to get samsung,lane-count\n"); video_info->max_lane_count = val; -- 2.34.1