From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (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 43BDE3D75C9 for ; Wed, 8 Apr 2026 15:40:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775662827; cv=none; b=D6AejWw5wFxuyy/jGpuahko7xlqp/mQedBkV4KazdO9/ok6LnXMwDzZkkHuVkHg9GNHUp1H9WkyOVvGwidj0ttwfDyF2hDCZdqKZyFgvv0LkzFAb1/zAzjJwkdIqjLy5dpve5W5XxZtuiiECy3gJdeEMh77sHHetEaqOTKYDIuU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775662827; c=relaxed/simple; bh=eC/g/BB3ptL9As+MQeQclsXvXodNTzzp+uj4SLpGek0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mNBlZrqx8YISSZCY1Qx+Vbwwsk6hLSRhUDRgH3cA2LY1zPzDvfQGNx9GuXTeiixk7BxOHYpqrQoocgzLLkpaDGIkTQWPtrqbxNz+HeBMpvDmtnj0MLSAVPMb/V4D1B4KpMKyBFSHkyl84MazHdfpGZpm7yp4TP3IYMPTww1f/KY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=HtkufbtU; arc=none smtp.client-ip=198.175.65.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="HtkufbtU" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1775662825; x=1807198825; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=eC/g/BB3ptL9As+MQeQclsXvXodNTzzp+uj4SLpGek0=; b=HtkufbtUFnzg9+d7HE6ljUvtWeFc0hjwWI879e73BWo/jAHGRrevJUsv WowoZ6F6qN61J22GDVd3UT9xBzoqD+tI9N8dkiaYjQT7nZzXtRWgXYhY0 qXCYBhnXA9n9Gw3F29jjEBLZaq/ThLhnlMBH0kRDN1u4A47ZaM+3ohrKu C/s8TRzogcXngUtCU94YtoEHyDZJAOMQFZmvPVbQn/sic0hKxGqliVKhz prbcHmePDnc+fCaP/EqjOGwK6HlYKCYoKM/p3Ay7d139o/9eZyGiDN7PB 2XXdryiBULC759FoDCRh2ytC31YA9vTRhdqD5LMxp2DfnTJk3/+YQHdEG g==; X-CSE-ConnectionGUID: 3hC8y0VTQl2qLAX8SAIJXg== X-CSE-MsgGUID: B9VnWNaERx68l5CsPmbrGQ== X-IronPort-AV: E=McAfee;i="6800,10657,11753"; a="94038510" X-IronPort-AV: E=Sophos;i="6.23,167,1770624000"; d="scan'208";a="94038510" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Apr 2026 08:40:02 -0700 X-CSE-ConnectionGUID: p1D02Q5nTN2fXLVV97nirA== X-CSE-MsgGUID: 0CiCxv7HSpabJ0WcKiK+lg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,167,1770624000"; d="scan'208";a="223740394" Received: from hrotuna-mobl2.ger.corp.intel.com (HELO kekkonen.fi.intel.com) ([10.245.245.104]) by fmviesa006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Apr 2026 08:39:53 -0700 Received: from punajuuri.localdomain (unknown [192.168.240.130]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 3AF43122102; Wed, 08 Apr 2026 18:39:51 +0300 (EEST) Received: from sailus by punajuuri.localdomain with local (Exim 4.98.2) (envelope-from ) id 1wAV0F-000000044Dn-2nHy; Wed, 08 Apr 2026 18:39:39 +0300 Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo From: Sakari Ailus To: linux-media@vger.kernel.org Cc: hans@jjverkuil.nl, laurent.pinchart@ideasonboard.com, Prabhakar , Kate Hsuan , Dave Stevenson , Tommaso Merciai , Benjamin Mugnier , Sylvain Petinot , Christophe JAILLET , Julien Massot , Naushir Patuck , "Yan, Dongcheng" , "Cao, Bingbu" , "Qiu, Tian Shu" , Stefan Klug , Mirela Rabulea , =?UTF-8?q?Andr=C3=A9=20Apitzsch?= , Heimir Thor Sverrisson , Kieran Bingham , Mehdi Djait , Ricardo Ribalda Delgado , Hans de Goede , Jacopo Mondi , Tomi Valkeinen , David Plowman , "Yu, Ong Hock" , "Ng, Khai Wen" , Jai Luthra , Rishikesh Donadkar Subject: [PATCH v4 23/29] media: Improve enable_streams and disable_streams documentation Date: Wed, 8 Apr 2026 18:39:32 +0300 Message-ID: <20260408153939.969381-24-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260408153939.969381-1-sakari.ailus@linux.intel.com> References: <20260408153939.969381-1-sakari.ailus@linux.intel.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Document that enable_streams may start additional streams and disable_streams may not disable requested streams if other related streams are still enabled. Signed-off-by: Sakari Ailus Reviewed-by: Jacopo Mondi Reviewed-by: Mirela Rabulea --- include/media/v4l2-subdev.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index d256b7ec8f84..4588992b4417 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -814,6 +814,10 @@ struct v4l2_subdev_state { * V4L2_SUBDEV_CAP_STREAMS sub-device capability flag can ignore the mask * argument. * + * Starting the requested streams may require starting additional + * streams. Streams that are started together due to hardware are called a + * stream group. + * * @disable_streams: Disable the streams defined in streams_mask on the given * source pad. Subdevs that implement this operation must use the active * state management provided by the subdev core (enabled through a call to @@ -823,6 +827,9 @@ struct v4l2_subdev_state { * Drivers that support only a single stream without setting the * V4L2_SUBDEV_CAP_STREAMS sub-device capability flag can ignore the mask * argument. + * + * A stream group is disabled when one or more streams in the stream + * group are disabled. */ struct v4l2_subdev_pad_ops { int (*enum_mbus_code)(struct v4l2_subdev *sd, -- 2.47.3