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 71468210E4 for ; Thu, 4 Apr 2024 08:19:35 +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=1712218777; cv=none; b=JP/6SVAQx+9WBiuzgvnBMxGUXda90GtOkCFT8TD5MfeRIjpiX4hPOcwkJfUlEuPZdcqW1RPQoh5P8KUyWXzg0j5ab2dAPzOF1tei3IgpM4UD0KToLDog9TsMihxe9dRijd8+ZwPeFvWy5N13ty0ZLjrTywfo6O7q17tMwCyI8nY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712218777; c=relaxed/simple; bh=d0O8jZ9xzaogUcYvQRojklXt00icJFxTzDb9Lz+GIm4=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=IAOnVotG3lgJG8TtKyJD8FN23KKOhGRGmXPsiHEHb/C3J1He0JRaEeZGjYOF4Zi9JorPS/6tbNKXtVT2+XAyf7nDDv/ejRw9JzmclSVYZ0Q7dr+DzYYgrRwZSw6NrzQH6arkfbWixQbsqIzq4VcAFXCf584pElimeH6ssfpKfQk= 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=a+kq8/B9; 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="a+kq8/B9" Received: from [192.168.88.20] (91-154-34-181.elisa-laajakaista.fi [91.154.34.181]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 7E6A01A2; Thu, 4 Apr 2024 10:18:48 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1712218729; bh=d0O8jZ9xzaogUcYvQRojklXt00icJFxTzDb9Lz+GIm4=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=a+kq8/B9sU+dOTfuAeM/26r9bOzLGIBhWm/GnsWqg5ONNcE0z8Yfo7wPXbaup25AI 78rI/KKA/6YUDP9DYsOqGLAWG0dwoQ7YQo4kMOk0CVVOqp8aoRE7GpyX5fe7RsCCyf j0Oq8s3SmSSX1S2beRlbbzjoMHYgIEzR6toMzGAM= Message-ID: Date: Thu, 4 Apr 2024 11:19:22 +0300 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 03/15] media: i2c: imx219: Report internal routes to userspace To: Laurent Pinchart , linux-media@vger.kernel.org, Sakari Ailus Cc: Dave Stevenson , David Plowman , Jean-Michel Hautbois , Hans Verkuil , Naushir Patuck , kernel-list@raspberrypi.com, linux-rpi-kernel@lists.infradead.org, Florian Fainelli , Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com References: <20240324220854.15010-1-laurent.pinchart@ideasonboard.com> <20240324220854.15010-4-laurent.pinchart@ideasonboard.com> Content-Language: en-US From: Tomi Valkeinen Autocrypt: addr=tomi.valkeinen@ideasonboard.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi, On 25/03/2024 00:08, Laurent Pinchart wrote: > Usage of internal pads creates a route internal to the subdev, and the > V4L2 camera sensor API requires such routes to be reported to userspace. > Create the route in the .init_state() operation. > > Internal routing support requires stream support, so set the > V4L2_SUBDEV_FL_HAS_STREAMS flag and switch formats and selection It's V4L2_SUBDEV_FL_STREAMS (not sure why, as the other flags have _HAS_). > rectangles access from pads to streams. As the route is immutable, > there's no need to implement the .set_routing() operation, and we can > hardcode the sink and source stream IDs to 0. This doesn't implement .enable/disable_streams(), but continues using .s_stream(). My understanding was that streams support requires .enable/disable_streams(), but obviously the framework doesn't require this at the moment. I encountered this while working on improving the v4l2_subdev_enable/disable_streams(), and my code assumed that only implementing .s_stream() means no streams support. So, how is it? I would say that .s_stream() is legacy, and streams enabled subdevices should not implement (only) it. Streams enabled subdevices can use v4l2_subdev_s_stream_helper for .s_stream, in addition to implementing .enable/disable_streams(). Tomi > Signed-off-by: Laurent Pinchart > Reviewed-by: Jacopo Mondi > --- > Changes since v6: > > - Drop change to get format API in imx219_set_ctrl() > - Fix function name in commit message > - Set V4L2_SUBDEV_ROUTE_FL_IMMUTABLE flag on route > --- > drivers/media/i2c/imx219.c | 24 +++++++++++++++++++++++- > 1 file changed, 23 insertions(+), 1 deletion(-) > > diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c > index 817bf192e4d9..6602250834be 100644 > --- a/drivers/media/i2c/imx219.c > +++ b/drivers/media/i2c/imx219.c > @@ -993,15 +993,36 @@ static int imx219_get_selection(struct v4l2_subdev *sd, > static int imx219_init_state(struct v4l2_subdev *sd, > struct v4l2_subdev_state *state) > { > + struct v4l2_subdev_route routes[1] = { > + { > + .sink_pad = IMX219_PAD_IMAGE, > + .sink_stream = 0, > + .source_pad = IMX219_PAD_SOURCE, > + .source_stream = 0, > + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE | > + V4L2_SUBDEV_ROUTE_FL_IMMUTABLE, > + }, > + }; > + struct v4l2_subdev_krouting routing = { > + .len_routes = ARRAY_SIZE(routes), > + .num_routes = ARRAY_SIZE(routes), > + .routes = routes, > + }; > struct v4l2_subdev_format fmt = { > .which = V4L2_SUBDEV_FORMAT_TRY, > .pad = IMX219_PAD_SOURCE, > + .stream = 0, > .format = { > .code = MEDIA_BUS_FMT_SRGGB10_1X10, > .width = supported_modes[0].width, > .height = supported_modes[0].height, > }, > }; > + int ret; > + > + ret = v4l2_subdev_set_routing(sd, state, &routing); > + if (ret) > + return ret; > > imx219_set_pad_format(sd, state, &fmt); > > @@ -1260,7 +1281,8 @@ static int imx219_probe(struct i2c_client *client) > > /* Initialize subdev */ > imx219->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | > - V4L2_SUBDEV_FL_HAS_EVENTS; > + V4L2_SUBDEV_FL_HAS_EVENTS | > + V4L2_SUBDEV_FL_STREAMS; > imx219->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; > > /*