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/linux/Documentation/driver-api/media/
H A Dv4l2-subdev.rst1 .. SPDX-License-Identifier: GPL-2.0
3 V4L2 sub-devices
4 ----------------
6 Many drivers need to communicate with sub-devices. These devices can do all
8 encoding or decoding. For webcams common sub-devices are sensors and camera
12 driver with a consistent interface to these sub-devices the
13 :c:type:`v4l2_subdev` struct (v4l2-subdev.h) was created.
15 Each sub-device driver must have a :c:type:`v4l2_subdev` struct. This struct
16 can be stand-alone for simple sub-devices or it might be embedded in a larger
18 low-level device struct (e.g. ``i2c_client``) that contains the device data as
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H A Dv4l2-intro.rst1 .. SPDX-License-Identifier: GPL-2.0
4 ------------
7 hardware: most devices have multiple ICs, export multiple device nodes in
8 /dev, and create also non-V4L2 devices such as DVB, ALSA, FB, I2C and input
15 called 'sub-devices'.
18 creating V4L device nodes and video_buf for handling the video buffers
21 This meant that all drivers had to do the setup of device instances and
22 connecting to sub-devices themselves. Some of this is quite complicated
32 A good example to look at as a reference is the v4l2-pci-skeleton.c
38 -------------------------
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/linux/include/media/
H A Dv4l2-flash-led-class.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * V4L2 flash LED sub-device registration helpers.
12 #include <media/v4l2-ctrls.h>
13 #include <media/v4l2-subdev.h>
21 * struct v4l2_flash_ctrl_data - flash control initialization data, filled
34 * struct v4l2_flash_ops - V4L2 flash operations
38 * @intensity_to_led_brightness: Convert intensity to brightness in a device
40 * @led_brightness_to_intensity: convert brightness to intensity in a device
53 * struct v4l2_flash_config - V4L2 Flash sub-device initialization data
56 * @intensity: non-flash strobe constraints for the LED
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H A Dv4l2-async.h1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
15 struct device;
22 * enum v4l2_async_match_type - type of asynchronous subdevice logic to be used
29 * algorithm that will be used to match an asynchronous device.
37 * struct v4l2_async_match_desc - async connection match information
65 * struct v4l2_async_connection - sub-device connection descriptor, as known to
68 * @match: struct of match type and per-bus type matching data sets
73 * @sd: the related sub-device
88 * struct v4l2_async_notifier_operations - Asynchronous V4L2 notifier operations
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H A Dv4l2-device.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 V4L2 device support header.
12 #include <media/media-device.h>
13 #include <media/v4l2-subdev.h>
14 #include <media/v4l2-de
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H A Dv4l2-event.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * v4l2-event.h
7 * Copyright (C) 2009--2010 Nokia Corporation.
25 * struct v4l2_kevent - Internal kernel event struct.
26 * @list: List node for the v4l2_fh->available list.
39 * struct v4l2_subscribed_event_ops - Subscribed event operations.
54 * struct v4l2_subscribed_event - Internal struct representing a subscribed
57 * @list: List node for the v4l2_fh->subscribed list.
60 * @flags: Copy of v4l2_event_subscription->flags.
85 * v4l2_event_dequeue - Dequeue events from video device.
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/linux/sound/usb/hiface/
H A Dpcm.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright 2012-2013 (C) M2TECH S.r.l and Amarula Solutions B.V.
53 bool panic; /* if set driver won't do anymore pcm on device */
114 struct usb_device *device = rt->chip->de in hiface_pcm_set_rate() local
173 struct device *device = &rt->chip->dev->dev; hiface_pcm_get_substream() local
232 struct device *device = &rt->chip->dev->dev; hiface_pcm_stream_start() local
255 hiface_pcm_playback(struct pcm_substream * sub,struct pcm_urb * urb) hiface_pcm_playback() argument
258 struct device *device = &urb->chip->dev->dev; hiface_pcm_playback() local
306 struct pcm_substream *sub; hiface_pcm_out_urb_handler() local
352 struct pcm_substream *sub = NULL; hiface_pcm_open() local
366 struct device *device = &rt->chip->dev->dev; hiface_pcm_open() local
395 struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub); hiface_pcm_close() local
419 struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub); hiface_pcm_prepare() local
454 struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub); hiface_pcm_trigger() local
484 struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub); hiface_pcm_pointer() local
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/linux/drivers/media/pci/bt8xx/
H A Dbttv-gpio.c1 // SPDX-License-Identifier: GPL-2.0-or-later
4 bttv-gpio.c -- gpio sub drivers
6 sysfs-based sub driver interface for bttv
10 Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de)
11 & Marcus Metzler (mocm@thp.uni-koeln.de)
12 (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
22 #include <linux/device.h>
28 /* ----------------------------------------------------------------------- */
31 static int bttv_sub_bus_match(struct device *dev, const struct device_driver *drv) in bttv_sub_bus_match()
33 const struct bttv_sub_driver *sub = to_bttv_sub_drv(drv); in bttv_sub_bus_match() local
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/linux/sound/soc/uniphier/
H A Daio-dma.c1 // SPDX-License-Identifier: GPL-2.0
5 // Copyright (c) 2016-2018 Socionext Inc.
7 #include <linux/dma-mapping.h>
28 static void aiodma_pcm_irq(struct uniphier_aio_sub *sub) in aiodma_pcm_irq() argument
30 struct snd_pcm_runtime *runtime = sub->substream->runtime; in aiodma_pcm_irq()
31 int bytes = runtime->period_size * in aiodma_pcm_irq()
32 runtime->channels * samples_to_bytes(runtime, 1); in aiodma_pcm_irq()
35 spin_lock(&sub->lock); in aiodma_pcm_irq()
36 ret = aiodma_rb_set_threshold(sub, runtime->dma_bytes, in aiodma_pcm_irq()
37 sub->threshold + bytes); in aiodma_pcm_irq()
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H A Daio-compress.c1 // SPDX-License-Identifier: GPL-2.0
5 // Copyright (c) 2017-2018 Socionext Inc.
9 #include <linux/dma-mapping.h>
26 struct snd_compr *compr = rtd->compr; in uniphier_aio_comprdma_new()
27 struct device *dev = compr->card->dev; in uniphier_aio_comprdma_new()
29 struct uniphier_aio_sub *sub in uniphier_aio_comprdma_new() local
62 struct uniphier_aio_sub *sub = &aio->sub[compr->direction]; uniphier_aio_comprdma_free() local
80 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction]; uniphier_aio_compr_open() local
106 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction]; uniphier_aio_compr_free() local
127 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction]; uniphier_aio_compr_get_params() local
140 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction]; uniphier_aio_compr_set_params() local
171 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction]; uniphier_aio_compr_hw_free() local
184 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction]; uniphier_aio_compr_prepare() local
223 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction]; uniphier_aio_compr_trigger() local
257 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction]; uniphier_aio_compr_pointer() local
281 aio_compr_send_to_hw(struct uniphier_aio_sub * sub,char __user * buf,size_t dstsize) aio_compr_send_to_hw() argument
332 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction]; uniphier_aio_compr_copy() local
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H A Daio.h1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Copyright (c) 2016-2018 Socionext Inc.
15 #include <sound/soc-dai.h>
43 /* IEC61937 Repetition period of data-burst in IEC60958 frames */
52 /* IEC61937 Repetition period of Pause data-burst in IEC60958 frames */
70 #define AUD_NAME_PCMIN1 "aio-pcmin1"
71 #define AUD_NAME_PCMIN2 "aio-pcmin2"
72 #define AUD_NAME_PCMIN3 "aio-pcmin3"
73 #define AUD_NAME_IECIN1 "aio-iecin1"
74 #define AUD_NAME_DIECIN1 "aio-diecin1"
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/linux/sound/usb/caiaq/
H A Daudio.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) 2006-2008 Daniel Mack, Karsten Wiese
6 #include <linux/device.h>
14 #include "device.h"
31 (stream << 1) | (~(i / (cdev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
52 struct snd_pcm_substream *sub) in activate_substream() argument
66 deactivate_substream(struct snd_usb_caiaqdev * cdev,struct snd_pcm_substream * sub) deactivate_substream() argument
170 snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream * sub) snd_usb_caiaq_pcm_hw_free() argument
260 snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream * sub,int cmd) snd_usb_caiaq_pcm_trigger() argument
284 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream * sub) snd_usb_caiaq_pcm_pointer() argument
323 struct snd_pcm_substream *sub; check_for_elapsed_periods() local
347 struct snd_pcm_substream *sub; read_in_urb_mode0() local
376 struct snd_pcm_substream *sub; read_in_urb_mode2() local
431 struct snd_pcm_substream *sub = cdev->sub_capture[stream]; read_in_urb_mode3() local
510 struct snd_pcm_substream *sub; fill_out_urb_mode_0() local
548 struct snd_pcm_substream *sub = cdev->sub_playback[stream]; fill_out_urb_mode_3() local
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/linux/Documentation/userspace-api/media/v4l/
H A Dvidioc-subdev-querycap.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_SUBDEV_QUERYCAP - Query sub-device capabilities
34 All V4L2 sub-devices support the ``VIDIOC_SUBDEV_QUERYCAP`` ioctl. It is used to
45 .. flat-table:: struct v4l2_subdev_capability
46 :header-rows: 0
47 :stub-columns: 0
50 * - __u32
51 - ``version``
52 - Version number of the driver.
57 distribution-modified kernel uses the V4L2 stack from a newer kernel.
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H A Dopen.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
18 The bridge driver exposes one or more V4L2 device nodes
22 the hardware, which may also expose device nodes, called V4L2 sub-devices.
24 When such V4L2 sub-devices are exposed, they allow controlling those
25 other hardware components - usually connected via a serial bus (like
26 I²C, SMBus or SPI). Depending on the bridge driver, those sub-devices
29 :ref:`V4L2 sub-devices <subdev>`.
32 :ref:`Media Controller <media_controller>` are called **MC-centric**
33 devices. The devices that are fully controlled via V4L2 device nodes
34 are called **video-node-centric**.
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/linux/Documentation/admin-guide/media/
H A Dqcom_camss.rst1 .. SPDX-License-Identifier: GPL-2.0
9 ------------
25 ----------------------------------
30 - 2 / 3 CSIPHY modules. They handle the Physical layer of the CSI2 receivers.
32 - 2 / 4 CSID (CSI Decoder) modules. They handle the Protocol and Application
36 - ISPIF (ISP Interface) module. Handles the routing of the data streams from
38 - 1 / 2 VFE (Video Front End) module(s). Contain a pipeline of image processing
48 -----------------------
52 - Input from camera sensor via CSIPHY;
53 - Generation of test input data by the TG in CSID;
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H A Dfimc.rst1 .. SPDX-License-Identifier: GPL-2.0
8 Copyright |copy| 2012 - 2013 Samsung Electronics Co., Ltd.
10 The FIMC (Fully Interactive Mobile Camera) device available in Samsung
17 drivers/media/platform/samsung/exynos4-is directory.
20 --------------
22 S5PC100 (mem-to-mem only), S5PV210, Exynos4210
25 ------------------
27 - camera parallel interface capture (ITU-R.BT601/565);
28 - camera serial interface capture (MIPI-CSI2);
29 - memory-to-memory processing (color space conversion, scaling, mirror
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/linux/Documentation/sound/designs/
H A Dprocfile.rst15 card-specific files are stored in the ``card*`` subdirectories.
32 Lists the ALSA native device mappings.
40 ``<card>-<device>: <name>``
44 ``<card>-<device>: <id>: <name> : <sub-streams>``
51 Lists the OSS device mappings.
61 The card-specific files are found in ``/proc/asound/card*`` directories.
68 stream. The number after ``pcm`` is the PCM device number from 0, and
72 The status of MIDI I/O is found in ``midi*`` files. It shows the device
73 name and the received/transmitted bytes through the MIDI device.
81 mapping by writing to this device. Read OSS-Emulation.txt for
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/linux/include/linux/mfd/
H A Ddln2.h1 /* SPDX-License-Identifier: GPL-2.0 */
8 u16 handle; /* sub-driver handle (internally used only) */
13 * dln2_event_cb_t - event callback function signature
15 * @pdev - the sub-device that registered this callback
16 * @echo - the echo header field received in the message
17 * @data - the data payload
18 * @len - the data payload length
29 * dl2n_register_event_cb - register a callback function for an event
31 * @pdev - the sub-device that registers the callback
32 * @event - the event for which to register a callback
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/linux/Documentation/devicetree/bindings/mailbox/
H A Dti,omap-mailbox.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/mailbox/ti,omap-mailbox.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Suman Anna <s-anna@ti.com>
35 lines can also be routed to different processor sub-systems on DRA7xx as they
48 A Mailbox device node is used to represent a Mailbox IP instance/cluster
49 within a SoC. The sub-mailboxes (actual communication channels) are
54 A device needing to communicate with a target processor device should specify
56 "mbox-names" (please see Documentation/devicetree/bindings/mailbox/mailbox.txt
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/linux/Documentation/usb/
H A Dacm.rst23 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 Should you need to contact me, the author, you can do so either by e-mail -
34 The drivers/usb/class/cdc-acm.c drivers works with USB modems and USB ISDN terminal
35 adapters that conform to the Universal Serial Bus Communication Device Class
40 - 3Com OfficeConnect 56k
41 - 3Com Voice FaxModem Pro
42 - 3Com Sportster
43 - MultiTech MultiModem 56k
44 - Zoom 2986L FaxModem
45 - Compaq 56k FaxModem
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/linux/Documentation/leds/
H A Dleds-class-flash.rst5 Some LED devices provide two modes - torch and flash. In the LED subsystem
6 those modes are supported by LED class (see Documentation/leds/leds-class.rst)
16 (see Documentation/ABI/testing/sysfs-class-led-flash)
18 - flash_brightness
19 - max_flash_brightness
20 - flash_timeout
21 - max_flash_timeout
22 - flash_strobe
23 - flash_fault
36 - dev:
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/linux/drivers/media/v4l2-core/
H A Dv4l2-async.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
9 #include <linux/device.h>
22 #include <media/v4l2-async.h>
23 #include <media/v4l2-device.h>
24 #include <media/v4l2-fwnode.h>
25 #include <media/v4l2-subdev.h>
27 #include "v4l2-subdev-priv.h"
33 if (!n->ops || !n->ops->bound) in v4l2_async_nf_call_bound()
36 return n->ops->bound(n, subdev, asc); in v4l2_async_nf_call_bound()
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/linux/include/drm/bridge/
H A Dmhl.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Defines for Mobile High-Definition Link (MHL) interface
9 * Copyright (C) 2013-2014 Silicon Image, Inc.
17 /* Device Capabilities Registers */
77 /* Extended Device Capabilities Registers */
107 /* Device Status Registers */
132 /* Extended Device Status Registers */
207 MHL_SET_CAP_ID = 0x66, /* Set Capture ID for downstream device */
208 MHL_GET_CAP_ID = 0x67, /* Get Capture ID from downstream device */
209 MHL_MSC_MSG = 0x68, /* VS command to send RCP sub-commands */
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/linux/Documentation/userspace-api/media/drivers/
H A Dccs.rst1 .. SPDX-License-Identifier: GPL-2.0-only
5 .. _media-ccs-uapi:
11 <https://www.mipi.org/specifications/camera-command-set>`_ compliant
12 camera sensors. It exposes three sub-devices representing the pixel array,
18 Also see :ref:`the CCS driver kernel documentation <media-ccs-driver>`.
20 Pixel Array sub-device
21 ----------------------
23 The pixel array sub-device represents the camera sensor's pixel matrix, as well
30 ------
32 The binner sub-device represents the binning functionality on the sensor. For
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/linux/Documentation/devicetree/bindings/net/
H A Dmarvell-pxa168.txt4 - compatible: should be "marvell,pxa168-eth".
5 - reg: address and length of the register set for the device.
6 - interrupts: interrupt for the device.
7 - clocks: pointer to the clock for the device.
10 - port-id: Ethernet port number. Should be '0','1' or '2'.
11 - #address-cells: must be 1 when using sub-nodes.
12 - #size-cells: must be 0 when using sub-nodes.
13 - phy-handle: see ethernet.txt file in the same directory.
18 Sub-nodes:
19 Each PHY can be represented as a sub-node. This is not mandatory.
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