From: Philipp Zabel <p.zabel@pengutronix.de>
To: linux-media@vger.kernel.org
Cc: Steve Longerbeam <steve_longerbeam@mentor.com>,
Marek Vasut <marex@denx.de>, Hans Verkuil <hverkuil@xs4all.nl>,
kernel@pengutronix.de, Philipp Zabel <p.zabel@pengutronix.de>
Subject: [PATCH 04/22] [media] v4l2-subdev.h: add prepare_stream op
Date: Fri, 7 Oct 2016 18:00:49 +0200 [thread overview]
Message-ID: <20161007160107.5074-5-p.zabel@pengutronix.de> (raw)
In-Reply-To: <20161007160107.5074-1-p.zabel@pengutronix.de>
In some cases, for example MIPI CSI-2 input on i.MX6, the sending and
receiving subdevice need to be prepared in lock-step before the actual
streaming can start. In the i.MX6 MIPI CSI-2 case, the sender needs to
put its MIPI CSI-2 transmitter lanes into stop state, and the receiver
needs to configure its D-PHY and detect the stop state on all active
lanes. Only then the sender can be enabled to stream data and the
receiver can lock its PLL to the clock lane.
This patch adds a prepare_stream(sd) callback that can be issued to all
v4l2_subdevs before calling s_stream(sd, 1).
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
include/media/v4l2-subdev.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index cf778c5..6502f43 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -395,6 +395,7 @@ struct v4l2_subdev_video_ops {
int (*g_tvnorms)(struct v4l2_subdev *sd, v4l2_std_id *std);
int (*g_tvnorms_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
int (*g_input_status)(struct v4l2_subdev *sd, u32 *status);
+ int (*prepare_stream)(struct v4l2_subdev *sd);
int (*s_stream)(struct v4l2_subdev *sd, int enable);
int (*g_pixelaspect)(struct v4l2_subdev *sd, struct v4l2_fract *aspect);
int (*g_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param);
--
2.9.3
next prev parent reply other threads:[~2016-10-07 16:01 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-07 16:00 [PATCH 00/22] Basic i.MX IPUv3 capture support Philipp Zabel
2016-10-07 16:00 ` [PATCH 01/22] [media] v4l2-async: move code out of v4l2_async_notifier_register into v4l2_async_test_nofity_all Philipp Zabel
2016-10-07 16:30 ` Marek Vasut
2016-10-07 16:53 ` Philipp Zabel
2016-10-07 16:00 ` [PATCH 02/22] [media] v4l2-async: allow subdevices to add further subdevices to the notifier waiting list Philipp Zabel
2016-10-07 21:52 ` Sakari Ailus
2016-10-12 13:26 ` Philipp Zabel
2016-10-13 11:56 ` Sakari Ailus
2016-10-14 15:47 ` Philipp Zabel
2016-10-07 22:43 ` Sakari Ailus
2016-10-14 15:48 ` Philipp Zabel
2016-10-14 17:06 ` Ian Arkver
2016-10-14 17:30 ` Philipp Zabel
2016-10-07 16:00 ` [PATCH 03/22] [media] v4l: of: add v4l2_of_subdev_registered Philipp Zabel
2016-10-07 18:50 ` Marek Vasut
2016-10-14 15:48 ` Philipp Zabel
2016-10-07 22:50 ` Sakari Ailus
2016-10-14 15:49 ` Philipp Zabel
2016-10-07 16:00 ` Philipp Zabel [this message]
2016-10-07 23:16 ` [PATCH 04/22] [media] v4l2-subdev.h: add prepare_stream op Sakari Ailus
2016-10-14 15:48 ` Philipp Zabel
2016-10-16 22:59 ` Sakari Ailus
2016-10-07 16:00 ` [PATCH 05/22] [media] v4l2-async: add new subdevices to the tail of subdev_list Philipp Zabel
2016-10-07 16:00 ` [PATCH 06/22] [media] imx: Add i.MX SoC wide media device driver Philipp Zabel
2016-10-07 16:00 ` [PATCH 07/22] [media] imx: Add IPUv3 media common code Philipp Zabel
2016-10-17 7:04 ` Ian Arkver
2016-10-07 16:00 ` [PATCH 08/22] [media] imx-ipu: Add i.MX IPUv3 CSI subdevice driver Philipp Zabel
2016-10-07 16:00 ` [PATCH 09/22] [media] imx: Add i.MX IPUv3 capture driver Philipp Zabel
2016-10-07 16:00 ` [PATCH 10/22] [media] platform: add video-multiplexer subdevice driver Philipp Zabel
2016-10-07 16:00 ` [PATCH 11/22] [media] imx: Add i.MX MIPI CSI-2 " Philipp Zabel
2016-10-07 16:00 ` [PATCH 12/22] [media] tc358743: put lanes in STOP state before starting streaming Philipp Zabel
2016-10-07 19:02 ` Marek Vasut
2016-10-14 15:49 ` Philipp Zabel
2016-10-07 16:00 ` [PATCH 13/22] ARM: dts: imx6qdl: Add capture-subsystem node Philipp Zabel
2016-10-07 16:00 ` [PATCH 14/22] ARM: dts: imx6qdl: Add mipi_ipu1/2 multiplexers, mipi_csi, and their connections Philipp Zabel
2016-10-07 16:01 ` [PATCH 15/22] ARM: dts: imx6qdl: Add MIPI CSI-2 D-PHY compatible and clocks Philipp Zabel
2016-10-07 16:01 ` [PATCH 16/22] ARM: dts: nitrogen6x: Add dtsi for BD_HDMI_MIPI HDMI to MIPI CSI-2 receiver board Philipp Zabel
2016-10-10 15:48 ` [16/22] " Gary Bisson
2016-10-14 16:45 ` Philipp Zabel
2016-10-07 16:01 ` [PATCH 17/22] gpu: ipuv3: add ipu_csi_set_downsize Philipp Zabel
2016-10-07 16:01 ` [PATCH 18/22] [media] imx-ipuv3-csi: support downsizing Philipp Zabel
2016-10-07 19:01 ` Marek Vasut
2016-10-14 15:48 ` Philipp Zabel
2016-10-16 15:09 ` Marek Vasut
2016-10-07 16:01 ` [PATCH 19/22] [media] add mux and video interface bridge entity functions Philipp Zabel
2016-10-07 16:01 ` [PATCH 20/22] [media] video-multiplexer: set entity function to mux Philipp Zabel
2016-10-07 16:01 ` [PATCH 21/22] [media] imx: Set i.MX MIPI CSI-2 entity function to bridge Philipp Zabel
2016-10-07 16:01 ` [PATCH 22/22] [media] tc358743: set entity function to video interface bridge Philipp Zabel
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