From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (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 1384D3C8728 for ; Wed, 25 Mar 2026 10:58:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774436332; cv=none; b=iXMcFh1zvhVOhJVNp0WfJE0cIeosUYeggX6ygUlEMr23OhWX6GztOsJccArMhP4b3B05YtSzTnU2QD4TMGn2KLXAaASYg2MF+l5VKIz5hyAsy4xD8ff5bAV3iYsRoLHTv2YVr0Y3mQBKXWlO1oM4u25pWWAWRllQCqZzTpFUvp8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774436332; c=relaxed/simple; bh=eC/g/BB3ptL9As+MQeQclsXvXodNTzzp+uj4SLpGek0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tR4rbr0TsKDjcVqVZnFrjkqojh1okaQjBvJWM4YQfx4K7mt76Izwr8xNcRTwNRsuP4tRXBS3KzB3Msn8ApQEd+df7nkpge5GXYF9qWmyb5qpY5YuBJCuccQiBmot0S03Fgbyt26RrOmEWrlk4vt6Lwy+YLYKW11zW1kyDiOZC48= 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=bUgj3BTP; arc=none smtp.client-ip=192.198.163.19 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="bUgj3BTP" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774436331; x=1805972331; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=eC/g/BB3ptL9As+MQeQclsXvXodNTzzp+uj4SLpGek0=; b=bUgj3BTP+Ix02+lXd2iuy8lAHzQ7YbeIfpjPCHvtTTWpC7YcBRGsAs14 YZoRJPPG3z8r7XzI8K5WTP2kW2eyjlfADE9PRv1V8mot+V5Koep0uqYHu fUNxAqJbYX1rWdRcdz+KaFUb2+/s1IKgFqE0y2KrvV7yIOVL0W85HpdhB /vfPvqDfbo7uEm958/p4taePVUZbsXh63yFcEuBdIlwhpOsYPfCUVIH2b +xY+2MDBlJugkFuANmYV42Xq1RxXQlu2JZEhWGtms47TNTpVtlinVoaUN GfRpnD8+e+M5aLmltcq5Pbk40dK2ht2pex/rO0nzZ7eIlz4MH6JV7oxKg A==; X-CSE-ConnectionGUID: thYK5MmBRDa2IQvp9lD4Ng== X-CSE-MsgGUID: d/CYD7zKTOW+WThdqDxElw== X-IronPort-AV: E=McAfee;i="6800,10657,11739"; a="74496445" X-IronPort-AV: E=Sophos;i="6.23,140,1770624000"; d="scan'208";a="74496445" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Mar 2026 03:58:49 -0700 X-CSE-ConnectionGUID: ybvUcegMS2qlGYPoi/mLJA== X-CSE-MsgGUID: aAU4jaTTSxuByqZ9aa/6ig== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,140,1770624000"; d="scan'208";a="221763537" Received: from dalessan-mobl3.ger.corp.intel.com (HELO kekkonen.fi.intel.com) ([10.245.245.64]) by fmviesa008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Mar 2026 03:58:43 -0700 Received: from punajuuri.localdomain (unknown [192.168.240.130]) by kekkonen.fi.intel.com (Postfix) with ESMTP id AB0A01223F8; Wed, 25 Mar 2026 12:58:30 +0200 (EET) Received: from sailus by punajuuri.localdomain with local (Exim 4.98.2) (envelope-from ) id 1w5LwJ-00000004wAh-0SHo; Wed, 25 Mar 2026 12:58:19 +0200 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 Subject: [PATCH v3 14/14] media: Improve enable_streams and disable_streams documentation Date: Wed, 25 Mar 2026 12:58:10 +0200 Message-ID: <20260325105818.1176816-15-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260325105818.1176816-1-sakari.ailus@linux.intel.com> References: <20260325105818.1176816-1-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