From 62b7f5931c54e96fca56dd8761b0e466d355c881 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Thu, 18 Feb 2021 18:04:33 +0100 Subject: bcm27xx: import latest patches from the RPi foundation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G bcm2710: boot tested on RPi 3B v1.2 bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas (cherry-picked from commit f07e572f64) --- ...ntation-media-Update-sub-device-API-intro.patch | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 target/linux/bcm27xx/patches-5.4/950-0637-Documentation-media-Update-sub-device-API-intro.patch (limited to 'target/linux/bcm27xx/patches-5.4/950-0637-Documentation-media-Update-sub-device-API-intro.patch') diff --git a/target/linux/bcm27xx/patches-5.4/950-0637-Documentation-media-Update-sub-device-API-intro.patch b/target/linux/bcm27xx/patches-5.4/950-0637-Documentation-media-Update-sub-device-API-intro.patch new file mode 100644 index 0000000000..f843a83a7d --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0637-Documentation-media-Update-sub-device-API-intro.patch @@ -0,0 +1,34 @@ +From afd6952c4dfb0d4945b496ef08b2f478d6f40097 Mon Sep 17 00:00:00 2001 +From: Jacopo Mondi +Date: Tue, 7 Apr 2020 17:21:55 +0200 +Subject: [PATCH] Documentation: media: Update sub-device API intro + +Update the V4L2 sub-device userspace API introduction to provide more +details on why complex devices might want to register devnodes for the +connected subdevices. + +Acked-by: Sakari Ailus +Suggested-by: Laurent Pinchart +Signed-off-by: Jacopo Mondi +--- + Documentation/media/kapi/v4l2-subdev.rst | 9 +++++++-- + 1 file changed, 7 insertions(+), 2 deletions(-) + +--- a/Documentation/media/kapi/v4l2-subdev.rst ++++ b/Documentation/media/kapi/v4l2-subdev.rst +@@ -275,8 +275,13 @@ system the .unbind() method is called. A + V4L2 sub-device userspace API + ----------------------------- + +-Beside exposing a kernel API through the :c:type:`v4l2_subdev_ops` structure, +-V4L2 sub-devices can also be controlled directly by userspace applications. ++Bridge drivers traditionally expose one or multiple video nodes to userspace, ++and control subdevices through the :c:type:`v4l2_subdev_ops` operations in ++response to video node operations. This hides the complexity of the underlying ++hardware from applications. For complex devices, finer-grained control of the ++device than what the video nodes offer may be required. In those cases, bridge ++drivers that implement :ref:`the media controller API ` may ++opt for making the subdevice operations directly accessible from userpace. + + Device nodes named ``v4l-subdev``\ *X* can be created in ``/dev`` to access + sub-devices directly. If a sub-device supports direct userspace configuration -- cgit v1.2.3