Commit Graph

1137820 Commits

Author SHA1 Message Date
Uwe Kleine-König
270d9afa5b media: i2c/m52790: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:30 +01:00
Uwe Kleine-König
be353426db media: i2c/lm3646: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:29 +01:00
Uwe Kleine-König
8dba8bc95e media: i2c/lm3560: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:29 +01:00
Uwe Kleine-König
2a47e9fd51 media: i2c/ks0127: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:29 +01:00
Uwe Kleine-König
3c6d4866e3 media: cx25840: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:28 +01:00
Uwe Kleine-König
a594a22131 media: i2c/cs5345: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:28 +01:00
Uwe Kleine-König
5fb1abe16b media: i2c/cs3308: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:28 +01:00
Uwe Kleine-König
320451afdc media: i2c/bt866: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:28 +01:00
Uwe Kleine-König
b1995c5600 media: i2c/bt856: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:27 +01:00
Uwe Kleine-König
0a1533e3e6 media: i2c/bt819: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:27 +01:00
Uwe Kleine-König
da6381ba93 media: i2c/ak881x: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:27 +01:00
Uwe Kleine-König
ce409f0e95 media: i2c/adv7842: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:26 +01:00
Uwe Kleine-König
22d045d6cc media: i2c/adv7511-v4l2: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:26 +01:00
Uwe Kleine-König
60622dd6ee media: i2c/adv7393: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:26 +01:00
Uwe Kleine-König
f31dab40c5 media: i2c/adv7183: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:26 +01:00
Uwe Kleine-König
e42e75836d media: i2c/adv7175: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:25 +01:00
Uwe Kleine-König
1c511423f8 media: i2c/adv7170: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:25 +01:00
Uwe Kleine-König
8981b1e816 media: i2c/adp1653: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:25 +01:00
Uwe Kleine-König
45d7e83cc5 media: i2c/ad9389b: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:24 +01:00
Uwe Kleine-König
4ed24a6421 media: i2c/ad5820: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:24 +01:00
Uwe Kleine-König
49a7233fee media: dvb-frontends/ts2020: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:24 +01:00
Uwe Kleine-König
2caaba0b90 media: dvb-frontends/tda10071: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:23 +01:00
Uwe Kleine-König
ce087f3102 media: dvb-frontends/stv6110x: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:23 +01:00
Uwe Kleine-König
be95f69c04 media: dvb-frontends/stv090x: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:23 +01:00
Uwe Kleine-König
06a61dc55a media: dvb-frontends/sp2: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:23 +01:00
Uwe Kleine-König
c7c631957b media: dvb-frontends/si2168: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:22 +01:00
Uwe Kleine-König
3be25b9ee3 media: dvb-frontends/si2165: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:22 +01:00
Uwe Kleine-König
db33c3cd83 media: dvb-frontends/rtl2832: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:22 +01:00
Uwe Kleine-König
75bcbaf722 media: dvb-frontends/rtl2830: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:21 +01:00
Uwe Kleine-König
f35a7249b8 media: dvb-frontends/mxl692: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:21 +01:00
Uwe Kleine-König
32f2129cce media: dvb-frontends/mn88473: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:21 +01:00
Uwe Kleine-König
d5f96d7a35 media: dvb-frontends/mn88472: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:20 +01:00
Uwe Kleine-König
0bada33eef media: dvb-frontends/lgdt330x: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:20 +01:00
Uwe Kleine-König
f11b4a06b4 media: dvb-frontends/lgdt3306a: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:20 +01:00
Uwe Kleine-König
006dfdbb05 media: dvb-frontends/helene: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:20 +01:00
Uwe Kleine-König
8f17faa5c6 media: dvb-frontends/cxd2820r_core: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:19 +01:00
Uwe Kleine-König
36628e8ed2 media: dvb-frontends/cxd2099: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:19 +01:00
Uwe Kleine-König
3a29275de5 media: dvb-frontends/au8522_decoder: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:19 +01:00
Uwe Kleine-König
479ac4dd6d media: dvb-frontends/af9033: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:18 +01:00
Uwe Kleine-König
e84171209b media: dvb-frontends/af9013: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:18 +01:00
Uwe Kleine-König
6266daa652 media: dvb-frontends/a8293: Convert to i2c's .probe_new()
The probe function doesn't make use of the i2c_device_id * parameter so it
can be trivially converted.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-21 11:04:18 +01:00
Eugen Hristev
fc6836b3b1 media: atmel: atmel-isc: move to staging
The Atmel ISC driver is not compliant with media controller specification.
In order to evolve this driver, it has to move to media controller, to
support enhanced features and future products which embed it.
The move to media controller involves several changes which are
not backwards compatible with the current usability of the driver.

The best example is the way the format is propagated from the top video
driver /dev/videoX down to the sensor.

In a simple configuration sensor ==> isc , the isc just calls subdev s_fmt
and controls the sensor directly. This is achieved by having a lot of code
inside the driver that will query the subdev at probe time and make a list
of formats which are usable.
Basically the user has nothing to configure, as the isc will handle
everything at the top level. This is an easy way to capture, but also comes
with the drawback of lack of flexibility.
In a more complicated pipeline
sensor ==> controller 1 ==> controller 2 ==> isc
this will not be achievable, as controller 1 and controller 2 might be
media-controller configurable, and will not propagate the formats down to
the sensor.

After discussions with the media maintainers, the decision is to move
Atmel ISC to staging as-is, to keep the Kconfig symbols and the users
to the driver in staging. Thus, all the existing users of the non
media-controller paradigm will continue to be happy and use the old config
way.

The new driver was added in the media subsystem with a different
symbol, with the conversion to media controller done, and new users
of the driver will be able to use all the new features.

This patch is merely a file move to staging, not affecting any of the
users.

The exported symbols had to be renamed to atmel_* to avoid duplication with
the new Microchip ISC driver.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-18 15:48:18 +01:00
Eugen Hristev
05255605d3 media: microchip: microchip-isc: move media_pipeline_* to (un)prepare cb
Move the media_pipeline_start/stop calls from start/stop streaming to
the new prepare_streaming and unprepare_streaming callbacks.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-18 15:48:18 +01:00
Eugen Hristev
86ff588c9e media: microchip: microchip-isc: implement media controller
As a top MC video driver, the microchip-isc should not propagate the format
to the subdevice, it should rather check at start_streaming() time if the
subdev is properly configured with a compatible format.
Removed the whole format finding logic, and reworked the format
verification at start_streaming time, such that the ISC will return an
error if the subdevice is not properly configured.
To achieve this, media_pipeline_start is called and a link_validate
callback is created to check the formats.
With this being done, the module parameter 'sensor_preferred' makes no
sense anymore. The ISC should not decide which format the sensor is using.
The ISC should only cope with the situation and inform userspace if the
streaming is possible in the current configuration.
The redesign of the format propagation has also risen the question of the
enumfmt callback. If enumfmt is called with an mbus_code, the enumfmt
handler should only return the formats that are supported for this
mbus_code. Otherwise, the enumfmt will report all the formats that the ISC
could output.
With this rework, the dynamic list of user formats is removed. It makes no
more sense to identify at complete time which formats the sensor could
emit, and add those into a separate dynamic list.
The ISC will start with a simple preconfigured default format, and at
link validate time, decide whether it can use the format that is
configured on the sink or not.
From now on, the driver also advertises the IO_MC capability.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-18 15:48:18 +01:00
Eugen Hristev
de32105cbe media: microchip: microchip-isc: prepare for media controller support
Prepare the support for media-controller.
This means that the capabilities of the driver have changed and now it's
capable of media controller operations.
The driver will register its media device, and add the video entity to this
media device. The subdevices are registered to the same media device.
The ISC will have a base entity which is auto-detected as
microchip_isc_base.
It will also register a subdevice that allows cropping of the incoming
frame to the maximum frame size supported by the ISC.
The ISC will create a link between the subdevice that is asynchronously
registered and the microchip_isc_scaler entity.
Then, the microchip_isc_scaler and microchip_isc_base are connected
through another link.
This patch does not change the previous capability of the driver, the
fact that the format is still being propagated from the top video node
down to the sensor.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-18 15:48:18 +01:00
Eugen Hristev
a5517d53d4 media: microchip: add ISC driver as Microchip ISC
The Atmel ISC driver will be moved to staging to support old users that
are not using the media controller paradigm.
The ISC driver was converted to media controller in the public patch
series:

https://lore.kernel.org/lkml/20220503095127.48710-1-eugen.hristev@microchip.com/T/#m2c320fa8153c01379a1c35b1d90a00903949513a

However the conversion cannot be done directly as it would affect existing
users by breaking the old way of configuration for sama5d2 platforms.

After discussions with the media maintainers, the decision is to move
Atmel ISC to staging as-is, to keep the Kconfig symbols and the users
to the driver in staging. Thus, all the existing users of the non
media-controller paradigm will continue to be happy and use the old config
way.

The converted driver would support both sama5d2 and sama7g5 platforms with
media controller paradigm, but it requires userspace configuration of the
pipeline for all the pipeline modules.

In a simple configuration sensor ==> isc , the old isc driver used to call
subdev s_fmt and control the sensor directly.
This was achieved by having a lot of code inside the driver that was
querying the subdev at probe time and made a list of formats which are
usable.
Basically the user had nothing to configure, as the isc would handle
everything at the top level. This was an easy way to capture, but also came
with the drawback of lack of flexibility.
In a more complicated pipeline
 sensor ==> controller 1 ==> controller 2 ==> isc
this would not be achievable, as controller 1 and controller 2 might be
media-controller configurable, and will not propagate the formats down to
the sensor.
The new driver Microchip ISC would solve all these problems and exposes pads
entities and links to userspace.
For the ease of tracking, the patches that convert to media controller come
on top of this patch that simply readds the driver to the new location under
the new Kconfig symbols.

To differentiate between the old driver and the new driver, I have renamed
the new driver to Microchip ISC, renaming the Kconfig symbols as well, and
all the mentions inside the driver.
The only thing that remains common is the file
include/linux/atmel-isc-media.h which is the ABI for the v4l2 custom
controls that the ISC exposes.
This file is used by both driver, so I kept it as-is.
To further avoid confusion all files have been renamed and all functions
named isc_* as well.
The exported symbols have been renamed with added microchip_ prefix, to
avoid symbol duplication with the old driver, and to avoid confusion.
Other than that, I have fixed small checkpatch issues when readding the
driver.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-18 15:48:18 +01:00
Eugen Hristev
5c0185625d media: atmel: move microchip_csi2dc to dedicated microchip platform
The Atmel ISC will be moved to staging thus the atmel platform will only
have the ISI driver.
The new media-controller converted ISC driver will be placed inside a
dedicated microchip platform directory.
It is then natural to have the microchip-csi2dc moved to this new platform
directory.
The next step is to add the Microchip ISC driver to the new platform
directory and reside together with the Microchip CSI2DC driver.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-18 15:48:17 +01:00
Hans Verkuil
c4a7df49d8 vb2/au0828: move the v4l_vb2q_enable_media_source to the au0828 driver
With the new prepare_streaming op it is possible to move the ugly
v4l_vb2q_enable_media_source() call in vb2_core_streamon to the
driver. It was called incorrectly in vb2 as well: it was only
called if sufficient buffers were queued at STREAMON time, but not
if more buffers were queued later. This was not an issue with the
au0828 driver since it never set min_buffers_needed.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-18 15:48:17 +01:00
Hans Verkuil
36c6f1fb2e vb2: add (un)prepare_streaming queue ops
When userspace called VIDIOC_STREAMON, then you want to claim any streaming
resources needed and validate the video pipeline. Waiting for
start_streaming to be called is too late, since that can be postponed
until the required minimum of buffers is queued.

So add a prepare_streaming op (optional) that can be used for that
purpose, and a matching unprepare_streaming op (optional) that can
release any claimed resources. The unprepare_streaming op is called
when VIDIOC_STREAMOFF is called and q->streaming is 1, or when the
filehandle is closed while q->streaming is 1.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-18 15:48:17 +01:00
Hans Verkuil
73937efbbe media: admin-guide: cec.rst
Document administration details about CEC devices. This was formerly
documented in a cec-status.txt I kept on my website, but this really
belongs here as an admin guide.

Updated the original cec-status.txt, and converted it to .rst.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2022-11-18 15:48:17 +01:00