From mboxrd@z Thu Jan 1 00:00:00 1970 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 386D75FB8C for ; Tue, 19 Mar 2024 23:48:35 +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=1710892118; cv=none; b=a4hkgh+BkMihMJ7ON+CfbDjcql4CNnWwAMY0hF1VdN6eTXOIqzL2S2efBCyDhXwapyGUT+cRZ4IgKoKF3cQf4MYnbmwCOjyfGF7pQA2J41a+P3gYznCjqfYL32MXJSRls4CvMG9uYSzsx0VtLRaqLf69vpoSubj72aI9I6CAWks= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710892118; c=relaxed/simple; bh=0wpjR2/7PMMTE3gaf0t3mX/1e/5KURM6QHb5FxeI8JY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=gn3vo6A/9ybmQbp1ZTgx4SbYstUKSz4isvYnND6amYpe5OZZzwzmTFIVn5/nYiIJR2BuCfsFxgyr4x1VmkUsNz7BdCUxPmB+kUds+dZVzY4iL8g7EjM9LAhEjPhcryInMnsqssYjj00d/IOnK3BGh7xfQ7dZbiLHVBD+vo+SKZI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (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=pX7iBXa0; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (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="pX7iBXa0" Received: from pendragon.ideasonboard.com (81-175-209-231.bb.dnainternet.fi [81.175.209.231]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 63C59B1; Wed, 20 Mar 2024 00:48:07 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1710892087; bh=0wpjR2/7PMMTE3gaf0t3mX/1e/5KURM6QHb5FxeI8JY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=pX7iBXa0vaExWrKhtBi7AVCyABlrK435mmNsX8oQyVjv9meDBIWskoz2QJHA3gQf4 kOtseF4cwRtWwYgwb0EnbyjZ66CElo7QHLq5v5EMFVsppYVYEpZvZ0RrkYVBtDsJJS 0KWrFZmuHsiGytCPVMWHgKmvaIgVwwnwcj/qOXFQ= Date: Wed, 20 Mar 2024 01:48:31 +0200 From: Laurent Pinchart To: Sakari Ailus Cc: linux-media@vger.kernel.org, tomi.valkeinen@ideasonboard.com, bingbu.cao@intel.com, hongju.wang@intel.com, hverkuil@xs4all.nl, Andrey Konovalov , Jacopo Mondi , Dmitry Perchanov , "Ng, Khai Wen" , Alain Volmat Subject: Re: [PATCH v8 07/38] media: Documentation: Additional streams generally don't harm capture Message-ID: <20240319234831.GL8501@pendragon.ideasonboard.com> References: <20240313072516.241106-1-sakari.ailus@linux.intel.com> <20240313072516.241106-8-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-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20240313072516.241106-8-sakari.ailus@linux.intel.com> Hi Sakari, Thank you for the patch. On Wed, Mar 13, 2024 at 09:24:45AM +0200, Sakari Ailus wrote: > Having extra streams on the source end of the link that cannot be captured > by the sink sub-device generally are not an issue, at least not on CSI-2 > bus. Still document that there may be hardware specific limitations. For s/hardware specific/hardware-specific/ > example on parallel bus this might not work on all cases. s/bus/buses/ > > Signed-off-by: Sakari Ailus > Reviewed-by: Tomi Valkeinen > --- > Documentation/userspace-api/media/v4l/dev-subdev.rst | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/Documentation/userspace-api/media/v4l/dev-subdev.rst b/Documentation/userspace-api/media/v4l/dev-subdev.rst > index f375b820ab68..a387e8a15b8d 100644 > --- a/Documentation/userspace-api/media/v4l/dev-subdev.rst > +++ b/Documentation/userspace-api/media/v4l/dev-subdev.rst > @@ -529,9 +529,9 @@ the its sink pad and allows to route them individually to one of its source > pads. > > Subdevice drivers that support multiplexed streams are compatible with > -non-multiplexed subdev drivers, but, of course, require a routing configuration > -where the link between those two types of drivers contains only a single > -stream. > +non-multiplexed subdev drivers. However, if the driver at the sink end of a link > +does not support streams, then only the stream 0 on source end may be s/the stream 0 on source end/stream 0 of the source/ > +captured. There may be additional hardware specific limitations. s/hardware specific/hardware-specific/ Or maybe There may be additional limitations specific to the sink device. Reviewed-by: Laurent Pinchart > > Understanding streams > ^^^^^^^^^^^^^^^^^^^^^ -- Regards, Laurent Pinchart