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/linux/Documentation/userspace-api/media/v4l/
H A Dpixfmt-packed-yuv.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _packed-yuv:
10 Cr components consecutively in memory. They may apply subsampling to the chroma
11 components and thus differ in how they interlave the three components.
15 - In all the tables that follow, bit 7 is the most significant bit in a byte.
16 - 'Y', 'Cb' and 'Cr' denote bits of the luma, blue chroma (also known as
17 'U') and red chroma (also known as 'V') components respectively. 'A'
25 These formats do not subsample the chroma components and store each pixels as a
29 component. They are named based on the order of the Y, Cb and Cr components as
30 seen in a 16-bit word, which is then stored in memory in little endian byte
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H A Dpixfmt-yuv-planar.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. planar-yuv:
12 - Semi-planar formats use two planes. The first plane is the luma plane and
13 stores the Y components. The second plane is the chroma plane and stores the
14 Cb and Cr components interleaved.
16 - Fully planar formats use three planes to store the Y, Cb and Cr components
19 Within a plane, components are stored in pixel order, which may be linear or
26 and applications that support the multi-planar API, described in
27 :ref:`planar-apis`. Unless explicitly documented as supporting non-contiguous
31 Semi-Planar YUV Formats
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H A Dpixfmt-rgb.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _pixfmt-rgb:
16 always the same for all components), the order of components in memory, and the
22 (including capture queues of mem-to-mem devices) fill the alpha component in
25 but can set the alpha bit to a user-configurable value, the
26 :ref:`V4L2_CID_ALPHA_COMPONENT <v4l2-alpha-component>` control is used to
31 :ref:`Output <output>` devices (including output queues of mem-to-mem devices
44 - In all the tables that follow, bit 7 is the most significant bit in a byte.
45 - 'r', 'g' and 'b' denote bits of the red, green and blue components
54 based on the order of the RGB components as seen in a 8-, 16- or 32-bit word,
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H A Dext-ctrls-jpeg.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _jpeg-controls:
15 .. _jpeg-control-id:
28 spatial dimension. See :ref:`itu-t81`, clause A.1.1. for more
30 how Cb and Cr components are downsampled after converting an input
35 .. flat-table::
36 :header-rows: 0
37 :stub-columns: 0
39 * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_444``
40 - No chroma subsampling, each pixel has Y, Cr and Cb values.
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H A Dopen.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
21 There are other drivers providing support for other components of
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**
34 are called **video-node-centric**.
36 Userspace can check if a V4L2 hardware peripheral is MC-centric by
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/linux/Documentation/userspace-api/media/
H A Dglossary.rst1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
58 **Field-programmable Gate Array**
63 See https://en.wikipedia.org/wiki/Field-programmable_gate_array.
71 A group of :term:`hardware components <Hardware Component>` that
72 together make a larger user-facing functional peripheral. For
80 **Inter-Integrated Circuit**
82 A multi-master, multi-slave, packet switched, single-ended,
83 serial computer bus used to control some hardware components
84 like sub-device hardware components.
86 See http://www.nxp.com/docs/en/user-guide/UM10204.pdf.
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/linux/Documentation/ABI/testing/
H A Dconfigfs-most9 # mount -t configfs none /sys/kernel/config/
22 configure the sub-buffer size for this channel
55 pass parameters needed by some components
60 configuration, the creation is post-poned until
77 configure the sub-buffer size for this channel
110 pass parameters needed by some components
115 configuration, the creation is post-poned until
132 configure the sub-buffer size for this channel
165 pass parameters needed by some components
170 configuration, the creation is post-poned until
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/linux/scripts/
H A Dget_dvb_firmware2 # SPDX-License-Identifier: GPL-2.0-or-later
11 @components = ( "sp8870", "sp887x", "tda10045", "tda10046",
26 for ($i=0; $i < scalar(@components); $i++) {
27 if ($cid eq $components[$i]) {
46 # ---------------------------------------------------------------
47 # Firmware-specific extraction subroutines
49 sub sp8870 {
53 my $outfile = "dvb-fe-sp8870.fw";
66 sub sp887x {
71 my $outfile = "dvb-fe-sp887x.fw";
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/linux/drivers/md/dm-vdo/indexer/
H A Dindex.h1 /* SPDX-License-Identifier: GPL-2.0-only */
9 #include "index-layout.h"
10 #include "index-session.h"
11 #include "open-chapter.h"
13 #include "volume-index.h"
16 * The index is a high-level structure which represents the totality of the UDS index. It manages
17 * the queues for incoming requests and dispatches them to the appropriate sub-components like the
22 * on its name. Most sub-components are similarly divided into zones as well so that requests in
/linux/drivers/media/platform/mediatek/mdp3/
H A Dmtk-mdp3-cmdq.c1 // SPDX-License-Identifier: GPL-2.0-only
4 * Author: Ping-Hsun Wu <ping-hsun.wu@mediatek.com>
9 #include "mtk-mdp3-cfg.h"
10 #include "mtk-mdp3-cmdq.h"
11 #include "mtk-mdp3-comp.h"
12 #include "mtk-mdp3-core.h"
13 #include "mtk-mdp3-m2m.h"
14 #include "mtk-img-ipi.h"
29 ((ctx)->comp->ops && (ctx)->comp->ops->op)
31 (has_op(ctx, op) ? (ctx)->comp->ops->op(ctx, ##__VA_ARGS__) : 0)
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/linux/Documentation/devicetree/bindings/arm/
H A Darm,coresight-dummy-source.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/arm/arm,coresight-dummy-source.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 CoreSight components are compliant with the ARM CoreSight architecture
12 SoCs tracing needs. These trace components can generally be classified as
19 there would be Coresight source trace components on sub-processor which
30 - Mike Leach <mike.leach@linaro.org>
31 - Suzuki K Poulose <suzuki.poulose@arm.com>
32 - James Clark <james.clark@linaro.org>
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/linux/Documentation/gpu/
H A Dkomeda-kms.rst1 .. SPDX-License-Identifier: GPL-2.0
16 functional pipeline stages called components, and every component has some
20 Typical D71 components:
23 -----
30 ------
39 -------------------
47 --------------------------
52 -----------------------------
57 --------------------------------
62 ------
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/linux/Documentation/devicetree/bindings/sound/
H A Domap-abe-twl6040.txt4 - compatible: "ti,abe-twl6040"
5 - ti,model: Name of the sound card ( for example "SDP4430")
6 - ti,mclk-freq: MCLK frequency for HPPLL operation
7 - ti,mcpdm: phandle for the McPDM node
8 - ti,twl6040: phandle for the twl6040 core node
9 - ti,audio-routing: List of connections between audio components.
14 - ti,dmic: phandle for the OMAP dmic node if the machine have it connected
15 - ti,jack-detection: Need to be present if the board capable to detect jack
18 Available audio endpoints for the audio-routing table:
28 * Sub Handset Mic
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H A Domap-twl4030.txt4 - compatible: "ti,omap-twl4030"
5 - ti,model: Name of the sound card (for example "omap3beagle")
6 - ti,mcbsp: phandle for the McBSP node
9 - ti,codec: phandle for the twl4030 audio node
10 - ti,mcbsp-voice: phandle for the McBSP node connected to the voice port of twl
11 - ti, jack-det-gpio: Jack detect GPIO
12 - ti,audio-routing: List of connections between audio components.
17 Available audio endpoints for the audio-routing table:
25 * Sub Mic
53 * Mic Bias 2 /* Used for Sub Mic or Digimic1 */
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H A Dsamsung,midas-audio.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/samsung,midas-audio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Sylwester Nawrocki <s.nawrocki@samsung.com>
13 - $ref: sound-card-common.yaml#
17 const: samsung,midas-audio
23 sound-dai:
27 - sound-dai
33 sound-dai:
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H A Dmt8192-mt6359-rt1015-rt5682.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/mt8192-mt6359-rt1015-rt5682.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jiaxin Yu <jiaxin.yu@mediatek.com>
11 - Shane Chien <shane.chien@mediatek.com>
17 - $ref: sound-card-common.yaml#
22 - mediatek,mt8192_mt6359_rt1015_rt5682
23 - mediatek,mt8192_mt6359_rt1015p_rt5682
24 - mediatek,mt8192_mt6359_rt1015p_rt5682s
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/linux/drivers/gpu/drm/vkms/
H A Dvkms_drv.h1 /* SPDX-License-Identifier: GPL-2.0+ */
29 * struct vkms_frame_info - Structure to store the state of a frame
32 * @src: source rectangle of this frame in the source framebuffer, stored in 16.16 fixed-point form
66 * struct vkms_plane_state - Driver specific plane state
89 * struct vkms_crtc_state - Driver specific CRTC state
96 * @num_active_planes). They should be stored in z-order.
123 * struct vkms_output - Internal representation of all output components in VKMS
156 * struct vkms_config - General configuration for VKMS driver
171 * struct vkms_device - Description of a VKMS device
173 * @drm - Base device in DRM
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/linux/drivers/gpu/drm/msm/disp/
H A Dmdp_format.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
41 * @fetch_type: how the color components are packed in pixel format
42 * @chroma_sample: chroma sub-samplng type
44 * @unpack_count: number of the components to unpack
67 #define MSM_FORMAT_IS_YUV(X) ((X)->flags & MSM_FORMAT_FLAG_YUV)
68 #define MSM_FORMAT_IS_DX(X) ((X)->flags & MSM_FORMAT_FLAG_DX)
69 #define MSM_FORMAT_IS_LINEAR(X) ((X)->fetch_mode == MDP_FETCH_LINEAR)
71 (((X)->fetch_mode == MDP_FETCH_UBWC) && \
72 !((X)->flags & MSM_FORMAT_FLAG_COMPRESSED))
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/linux/drivers/base/
H A Dcomponent.c1 // SPDX-License-Identifier: GPL-2.0
16 * The component helper allows drivers to collect a pile of sub-devices,
18 * already provide functions to get hold of such components, e.g.
20 * subsystem-specific way to find a device is not available: The component
24 * the SoC on various components (scanout engines, blending blocks, transcoders
30 * Components are registered using component_add() and unregistered with
85 struct aggregate_device *m = s->private; in component_devices_show()
86 struct component_match *match = m->match; in component_devices_show()
90 seq_printf(s, "%-40s %20s\n", "aggregate_device name", "status"); in component_devices_show()
91 seq_puts(s, "-------------------------------------------------------------\n"); in component_devices_show()
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/linux/drivers/staging/most/Documentation/
H A Ddriver_usage.txt5 access a MOST network: The Automotive Information Backbone and the de-facto
6 standard for high-bandwidth automotive multimedia networking.
9 for the efficient and low-cost transport of control, real-time and packet
94 This layer contains a pool of device drivers that are components of the
98 following components are available
128 - buffer_size
130 - subbuffer_size
131 configure the sub-buffer size for this channel (needed for
133 - num_buffers
135 - datatype
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/linux/sound/soc/samsung/
H A Dlowland.c1 // SPDX-License-Identifier: GPL-2.0+
8 #include <sound/soc-dapm.h>
39 struct snd_soc_component *component = snd_soc_rtd_to_codec(rtd, 0)->component; in lowland_wm5100_init()
50 /* Clock OPCLK, used by the other audio components. */ in lowland_wm5100_init()
58 ret = snd_soc_card_jack_new_pins(rtd->card, "Headset", in lowland_wm5100_init()
73 struct snd_soc_component *component = snd_soc_rtd_to_codec(rtd, 0)->component; in lowland_wm9081_init()
75 snd_soc_dapm_nc_pin(&rtd->card->dapm, "LINEOUT"); in lowland_wm9081_init()
91 DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
92 DAILINK_COMP_ARRAY(COMP_CODEC("wm5100.1-001a", "wm5100-aif1")),
93 DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
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/linux/Documentation/trace/coresight/
H A Dcoresight-config.rst1 .. SPDX-License-Identifier: GPL-2.0
14 programming of the CoreSight system with pre-defined configurations that
17 Many CoreSight components can be programmed in complex ways - especially ETMs.
18 In addition, components can interact across the CoreSight system, often via
19 the cross trigger components such as CTI and CTM. These system settings can
30 --------
41 accesses in the driver - the resource usage and parameter descriptions
67 system - which is described below.
74 --------------
82 enabled on a class of devices - i.e. any ETMv4, or specific devices, e.g. a
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/linux/Documentation/gpu/amdgpu/
H A Ddriver-core.rst12 The driver is arranged by IPs. There are driver components to handle
22 components are shared between the CPU, platform, and the GPU (e.g.,
23 SMU, PSP, etc.). Specific components (CPU, GPU, etc.) usually have
24 their interface to interact with those common components. For things
26 components, but that is probably a bit beyond the scope of this
32 This was a dedicated IP on older pre-vega chips, but has since
58 It is described in more details in :ref:`Display Core <amdgpu-display-core>`.
61 This is a multi-purpose DMA engine. The kernel driver uses it for
69 largest block on the GPU. The 3D pipeline has tons of sub-blocks. In
75 This is the multi-media engine. It handles video and image encode and
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/linux/drivers/mfd/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
32 the core APIs _only_, you have to select individual components like
57 tristate "Active-semi ACT8945A"
62 Support for the ACT8945A PMIC from Active-semi. This device
63 features three step-down DC/DC converters and four low-dropout
79 sun4i-gpadc-iio and the hwmon driver iio_hwmon.
82 called sun4i-gpadc.
113 tablets etc. It has 4 DC/DC step-down regulators, 3 DC/DC step-down
124 individual components like LCD backlight, LEDs, GPIOs and Kepad
144 over at91-usart-serial driver and usart-spi-driver. Only one function
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/linux/Documentation/devicetree/bindings/usb/
H A Domap-usb.txt1 OMAP GLUE AND OTHER OMAP SPECIFIC COMPONENTS
4 - compatible : Should be "ti,omap4-musb" or "ti,omap3-musb"
5 - ti,hwmods : must be "usb_otg_hs"
6 - multipoint : Should be "1" indicating the musb controller supports
7 multipoint. This is a MUSB configuration-specific setting.
8 - num-eps : Specifies the number of endpoints. This is also a
9 MUSB configuration-specific setting. Should be set to "16"
10 - ram-bits : Specifies the ram address size. Should be set to "12"
11 - interface-type : This is a board specific setting to describe the type of
14 - mode : Should be "3" to represent OTG. "1" signifies HOST and "2"
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