media: drop CONFIG_MEDIA_CONTROLLER_REQUEST_API

This config option was added during the development of the Request API
to make it easy to disable it.

The Request API is now stable so it is time to drop this option altogether.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

media: mc-device: remove unnecessary __must_check

In the file mc-device.c, the function
media_device_register_entity_notify() does not need to have the
__must_check attribute since it returns only a value of 0.
Therefore, we can remove this attribute and change the function's
return type.

Signed-off-by: Jason Kim <sukbeom.kim@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

media: mc: entity: Add iterator helper for entity pads

Add an iterator helper to easily cycle through all pads in an entity and
use it in media-entity and media-device code where appropriate.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

media: mc: delete redundant code in __media_device_unregister_entity

media_gobj_destroy has already set graph_obj.mdev to NULL. There is no
need to set it again.

[Sakari Ailus: Remove extra newline, rewrap commit msg]

Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

media: mc: Set bus_info in media_device_init()

Set bus_info field based on struct device in media_device_init() and
remove corresponding code from drivers.

Also update media_device_init() documentation: the dev field must be now
initialised before calling it.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

media: mc: Remove redundant documentation

Remove redundant kerneldoc documentation in mc-device.c. The functions are
already documented in media-device.h, where non-redundant documentation is
also moved.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

media: mc-device.c: use DEVICE_ATTR_RO() helper macro

Use DEVICE_ATTR_RO() helper macro instead of DEVICE_ATTR(), which is
simpler and more readable.

Due to the name of the read function of the sysfs attribute is normalized,
there is a natural association.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: mc-device.c: change media_device_request_alloc to match media_ioctl_info

We modified the type of media_device_request_alloc()'s second
parameter from int* to void* so that it can match the interface
defined in struct media_ioctl_info.

[hverkuil: move #ifdef before variable to avoid compile warning]

Signed-off-by: Frederic Chen <frederic.chen@mediatek.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: mc-device.c: fix memleak in media_device_register_entity

In media_device_register_entity, if media_graph_walk_init fails,
need to free the previously memory.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: mc-device.c: don't memset __user pointer contents

You can't memset the contents of a __user pointer. Instead, call copy_to_user to
copy links.reserved (which is zeroed) to the user memory.

This fixes this sparse warning:

SPARSE:drivers/media/mc/mc-device.c drivers/media/mc/mc-device.c:521:16: warning: incorrect type in argument 1 (different address spaces)

Fixes: f49308878d720 ("media: media_device_enum_links32: clean a reserved field")

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: move drivers/media/media-* to drivers/media/mc/mc-*

It is really weird that the media controller sources are all top-level
in drivers/media. It is a bit of a left-over from long ago when most
media sources were all at the top-level. At some point we reorganized
the directory structure, but the media-*.c sources where never moved
to their own directory.

So create a new mc directory and move all sources there. Also rename
the prefix from media- to mc-.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>