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Groups > linux.kernel > #1574492

[PATCH] media: add operation to get configuration of "the other side" of the link

From Pavel Machek <pavel@ucw.cz>
Newsgroups linux.kernel
Subject [PATCH] media: add operation to get configuration of "the other side" of the link
Date 2017-02-06 10:40 +0100
Message-ID <t7NWa-3aZ-3@gated-at.bofh.it> (permalink)
References (5 earlier) <t6TKi-7ml-25@gated-at.bofh.it> <t7gxb-6vY-1@gated-at.bofh.it> <t7h9U-75V-17@gated-at.bofh.it> <t7Co1-4cN-15@gated-at.bofh.it> <t7EJb-5x1-7@gated-at.bofh.it>
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Normally, link configuration can be determined at probe time... but
Nokia N900 has two cameras, and can switch between them at runtime, so
that mechanism is not suitable here.

Add a hook that tells us link configuration.

Signed-off-by: Pavel Machek <pavel@ucw.cz>

diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index cf778c5..74148b9 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -25,6 +25,7 @@
 #include <media/v4l2-dev.h>
 #include <media/v4l2-fh.h>
 #include <media/v4l2-mediabus.h>
+#include <media/v4l2-of.h>
 
 /* generic v4l2_device notify callback notification values */
 #define V4L2_SUBDEV_IR_RX_NOTIFY		_IOW('v', 0, u32)
@@ -383,6 +384,8 @@ struct v4l2_mbus_frame_desc {
  * @s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev
  *	can adjust @size to a lower value and must not write more data to the
  *	buffer starting at @data than the original value of @size.
+ *
+ * @g_endpoint_config: get link configuration required by this device.
  */
 struct v4l2_subdev_video_ops {
 	int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
@@ -415,6 +418,8 @@ struct v4l2_subdev_video_ops {
 			     const struct v4l2_mbus_config *cfg);
 	int (*s_rx_buffer)(struct v4l2_subdev *sd, void *buf,
 			   unsigned int *size);
+	int (*g_endpoint_config)(struct v4l2_subdev *sd,
+			    struct v4l2_of_endpoint *cfg);
 };
 
 /**




-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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Thread

[PATCH] devicetree: Add video bus switch Pavel Machek <pavel@ucw.cz> - 2017-02-03 13:40 +0100
  Re: [PATCH] devicetree: Add video bus switch Sakari Ailus <sakari.ailus@iki.fi> - 2017-02-03 14:10 +0100
    Re: [PATCH] devicetree: Add video bus switch Pavel Machek <pavel@ucw.cz> - 2017-02-03 22:10 +0100
      Re: [PATCH] devicetree: Add video bus switch Sakari Ailus <sakari.ailus@iki.fi> - 2017-02-03 22:40 +0100
        Re: [PATCH] devicetree: Add video bus switch Pavel Machek <pavel@ucw.cz> - 2017-02-04 23:00 +0100
          Re: [PATCH] devicetree: Add video bus switch Sakari Ailus <sakari.ailus@iki.fi> - 2017-02-04 23:40 +0100
            Re: [PATCH] devicetree: Add video bus switch Pavel Machek <pavel@ucw.cz> - 2017-02-05 22:20 +0100
              Re: [PATCH] devicetree: Add video bus switch Sebastian Reichel <sre@kernel.org> - 2017-02-06 00:50 +0100
                [PATCH] media: add operation to get configuration of "the other  side" of the link Pavel Machek <pavel@ucw.cz> - 2017-02-06 10:40 +0100
  Re: [PATCH] devicetree: Add video bus switch Pali Rohár <pali.rohar@gmail.com> - 2017-02-03 14:40 +0100
    Re: [PATCH] devicetree: Add video bus switch Pavel Machek <pavel@ucw.cz> - 2017-02-03 22:10 +0100
      Re: [PATCH] devicetree: Add video bus switch Sebastian Reichel <sre@kernel.org> - 2017-02-04 02:10 +0100
  Re: [PATCH] devicetree: Add video bus switch Rob Herring <robh@kernel.org> - 2017-02-08 23:20 +0100
    Re: [PATCH] devicetree: Add video bus switch Pavel Machek <pavel@ucw.cz> - 2017-02-08 23:40 +0100
      Re: [PATCH] devicetree: Add video bus switch Rob Herring <robh@kernel.org> - 2017-02-10 00:20 +0100
        Re: [PATCH] devicetree: Add video bus switch Pavel Machek <pavel@ucw.cz> - 2017-02-10 21:00 +0100
          Re: [PATCH] devicetree: Add video bus switch Sakari Ailus <sakari.ailus@iki.fi> - 2017-02-10 23:20 +0100
            Re: [PATCH] devicetree: Add video bus switch Pavel Machek <pavel@ucw.cz> - 2017-02-13 11:00 +0100
              Re: [PATCH] devicetree: Add video bus switch Sakari Ailus <sakari.ailus@iki.fi> - 2017-02-13 11:30 +0100
      Re: [PATCH] devicetree: Add video bus switch Rob Herring <robh@kernel.org> - 2017-02-10 00:20 +0100
    Re: [PATCH] devicetree: Add video bus switch Pavel Machek <pavel@ucw.cz> - 2017-02-09 00:00 +0100
      Re: [PATCH] devicetree: Add video bus switch Rob Herring <robh@kernel.org> - 2017-02-10 00:20 +0100
        Re: [PATCH] devicetree: Add video bus switch Pavel Machek <pavel@ucw.cz> - 2017-02-10 22:20 +0100

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