From nobody Thu Oct 2 02:15:08 2025 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 73EEB3019C1; Thu, 25 Sep 2025 15:55:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758815738; cv=none; b=pSIyjwWkpZuTr5Y4g6uCVZ0FLqiCpjQS9TVEcohYIdy2+sL6z3TIeL/3NgS9RerEEkTaHmt+jSCOrxg8+L0W2tCRLiALgh+ov3V15/JJ6GaLL2WxE4qGgn36oQKVRLgGWEv26A/VNBnp25TNFkEknCPpGzdErnJCtm4pn+EoTe8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758815738; c=relaxed/simple; bh=/lYx9HajpxPlfcmmhJX0reUWRFqHU9LFR9AeyxwXFvs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=O0R8mDIdvPJkbdmeoj0k6qbTDgm7GChYS20zyFYPSGyS5u1rRJoAq43eYeKNShjvUQ5tljQ1JUC2Aee2caZxHbWskyTAx/Px7kS7CGtRsIIHjlGLK0xHbF9JVjt1fCAwTEVbPBCFTUsn+1AWd8ar0RwWgkCRxAOLwq6htI9RzUQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=kPzyiha4; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="kPzyiha4" Received: from [127.0.1.1] (cpc89244-aztw30-2-0-cust6594.18-1.cable.virginm.net [86.31.185.195]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 8760AD0; Thu, 25 Sep 2025 17:54:03 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1758815644; bh=/lYx9HajpxPlfcmmhJX0reUWRFqHU9LFR9AeyxwXFvs=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=kPzyiha4JC5Hq+Csjvya3qKr/yrHn0ySD9dej4E3Z14t/3SUAjucOnnZeWwSY9Dpk r2MdDMzyvk5zcf29zim9/bqMAXX1kLBzovOzdeFq/biX9/51ojTqd2EiViTF6CEFJV zXRUSdQO+EAAfyCREfn7dMuXFmsThJVj+6LfMCto= From: Isaac Scott Date: Thu, 25 Sep 2025 16:54:29 +0100 Subject: [PATCH v4 4/4] media: imx-mipi-csis: Get number of active lanes via mbus_config 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: quoted-printable Message-Id: <20250925-active-data-lanes-v4-4-8b54e3d5af6c@ideasonboard.com> References: <20250925-active-data-lanes-v4-0-8b54e3d5af6c@ideasonboard.com> In-Reply-To: <20250925-active-data-lanes-v4-0-8b54e3d5af6c@ideasonboard.com> To: Mauro Carvalho Chehab , Rui Miguel Silva , Laurent Pinchart , Martin Kepplinger , Purism Kernel Team , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Sakari Ailus Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Isaac Scott X-Mailer: b4 0.13.0 The number of lanes actively used by a MIPI CSI transmitter may differ from that which is defined in device tree, due to the source device not using all of the connected data lanes on the board. As such, call on v4l2_get_active_data_lanes() to check if the driver reports a differing number of lanes to the maximum, and use that number of active lanes. If the number of active data lanes is invalid, or the op is not supported, use the maximum number of allowed data lanes. Signed-off-by: Isaac Scott --- drivers/media/platform/nxp/imx-mipi-csis.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/media/platform/nxp/imx-mipi-csis.c b/drivers/media/pla= tform/nxp/imx-mipi-csis.c index 838a1ad123b5..637ef6e614fa 100644 --- a/drivers/media/platform/nxp/imx-mipi-csis.c +++ b/drivers/media/platform/nxp/imx-mipi-csis.c @@ -1034,6 +1034,10 @@ static int mipi_csis_s_stream(struct v4l2_subdev *sd= , int enable) format =3D v4l2_subdev_state_get_format(state, CSIS_PAD_SINK); csis_fmt =3D find_csis_format(format->code); =20 + ret =3D v4l2_get_active_data_lanes(csis->source.pad, + csis->bus.num_data_lanes); + csis->num_data_lanes =3D ret < 0 ? csis->bus.num_data_lanes : ret; + ret =3D mipi_csis_calculate_params(csis, csis_fmt); if (ret < 0) goto err_unlock; --=20 2.43.0