From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) (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 6B61233ADBF for ; Sun, 7 Jun 2026 21:54:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.7 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780869268; cv=none; b=IcgreHMcv4p+hoeqV5kTcWgkus3j/4Iq34jZb3AO6CR85Qw9XP6B+wbsiqeiucu6unnqiEiXkfCRCccTRgrl4WidKfekbXWGIlzLLub58mhGdq4pNxR8tiUXCtGnJnzk38vk0VyJ7i1MpTo4lU+o9x/gzji2SSLkd5ZGtvKn2jE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780869268; c=relaxed/simple; bh=3/bYUgfHq46pzAIPdHrDpPPvGQbCYPs6FY+jL96XHCE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ORsa5ZnOMnOimGvA9J2bODLmYmYp03ak+mMm1/LN3M17AyNvS8xyFDcyWCoLagJCDyim/fPDGuTx8mM2E/ua+QKfT6yCL7RgZVGgSh5DB5IbqS+m8GGRvBc4ahnz243iBt56jgZKxIS7ENmiuhQp/R5dluT3UKYDhhKPxfszCks= 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=J0qL6IxM; arc=none smtp.client-ip=192.198.163.7 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="J0qL6IxM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1780869266; x=1812405266; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=3/bYUgfHq46pzAIPdHrDpPPvGQbCYPs6FY+jL96XHCE=; b=J0qL6IxMQYEFIwyOCo774HMx2CHTM8BUM84AoQ6BBFz2obOQQXTpumJ+ fgKKWetNAkkNFgQdRWZo7mhSAmBtg6h7XKd1LCGbKxCfOlBg2w4jA98zP p63TdPhiwkvzTHF30mEQX7vQZtScTB0lyb2NdJNA9DLuoQHZ2H3quFyL9 crOci/7Ubh2WAvPJUjb059EoMz5fjefFSD3FtjjNOPXXu87yrcYyKcCO6 EU0N3c0quD8a/oql6+4wV4lSkbivbvQcCTQL15lw85ShPGxdxcGkExN3K uIXk+/D27L7AKwH2REGhuhrXrHvouanihCjfvXpz5qGUlJ9GmA9O2hR1E Q==; X-CSE-ConnectionGUID: JhPhQZ0mT++CmK0obGMYEQ== X-CSE-MsgGUID: McHN6xorQOCTng+v6RNQnA== X-IronPort-AV: E=McAfee;i="6800,10657,11810"; a="107048341" X-IronPort-AV: E=Sophos;i="6.24,193,1774335600"; d="scan'208";a="107048341" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jun 2026 14:54:24 -0700 X-CSE-ConnectionGUID: FrINc1AORFqfHZOghezOOA== X-CSE-MsgGUID: 8NAj/MWzQbK35jt/N5CfmQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,193,1774335600"; d="scan'208";a="245490510" Received: from amilburn-desk.amilburn-desk (HELO kekkonen.fi.intel.com) ([10.245.244.101]) by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jun 2026 14:54:18 -0700 Received: from punajuuri.localdomain (unknown [192.168.240.130]) by kekkonen.fi.intel.com (Postfix) with ESMTP id B54F4121CA1; Mon, 08 Jun 2026 00:54:07 +0300 (EEST) Received: from sailus by punajuuri.localdomain with local (Exim 4.98.2) (envelope-from ) id 1wWLRM-00000003XId-12I6; Mon, 08 Jun 2026 00:53:56 +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" , 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 v5 07/10] media: Improve enable_streams and disable_streams documentation Date: Mon, 8 Jun 2026 00:53:53 +0300 Message-ID: <20260607215356.842932-8-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260607215356.842932-1-sakari.ailus@linux.intel.com> References: <20260607215356.842932-1-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 | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 0361c8bbee38..a25234befbe9 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -828,6 +828,10 @@ 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 and stopped 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 @@ -837,6 +841,10 @@ 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. + * + * Stopping the requested streams may be delayed due to other enabled + * streams in the stream group, where all streams are started and stopped + * together. */ struct v4l2_subdev_pad_ops { int (*enum_mbus_code)(struct v4l2_subdev *sd, -- 2.47.3