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/linux-6.12.1/Documentation/driver-api/media/
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
[all …]
/linux-6.12.1/sound/soc/uniphier/
Daio-core.c1 // SPDX-License-Identifier: GPL-2.0
5 // Copyright (c) 2016-2018 Socionext Inc.
17 #include "aio-reg.h"
22 return wr - rd; in rb_cnt()
24 return len - (rd - wr); in rb_cnt()
30 return wr - rd; in rb_cnt_to_end()
32 return len - rd; in rb_cnt_to_end()
38 return len - (wr - rd) - 8; in rb_space()
40 return rd - wr - 8; in rb_space()
46 return rd - wr - 8; in rb_space_to_end()
[all …]
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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/linux-6.12.1/include/media/
Dv4l2-async.h1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
22 * enum v4l2_async_match_type - type of asynchronous subdevice logic to be used
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
89 * @bound: a sub-device has been bound by the given connection
107 * struct v4l2_async_notifier - v4l2_device notifier data
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Dv4l2-device.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
12 #include <media/media-device.h>
13 #include <media/v4l2-subdev.h>
14 #include <media/v4l2-dev.h>
19 * struct v4l2_device - main struct to for V4L2 device drivers
27 * @notify: notify operation called by some sub-devices.
31 * @release: Release function that is called when the ref count
35 * either stand-alone or embedded in a larger struct.
37 * It allows easy access to sub-devices (see v4l2-subdev.h) and provides
38 * basic V4L2 device-level support.
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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
53 * struct v4l2_flash_config - V4L2 Flash sub-device initialization data
56 * @intensity: non-flash strobe constraints for the LED
60 * <linux/led-class-flash.h>
71 * struct v4l2_flash - Flash sub-device context
[all …]
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-6.12.1/Documentation/filesystems/
Drelay.rst1 .. SPDX-License-Identifier: GPL-2.0
9 to userspace via user-defined 'relay channels'.
11 A 'relay channel' is a kernel->user data relay mechanism implemented
12 as a set of per-cpu kernel buffers ('channel buffers'), each
25 filtering - this also is left to the kernel client. The purpose is to
29 details of the function parameters are documented along with the
30 functions in the relay interface code - please see that for details.
36 sub-buffers. Messages are written to the first sub-buffer until it is
38 the next (if available). Messages are never split across sub-buffers.
40 sub-buffer, while the kernel continues writing to the next.
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/linux-6.12.1/include/linux/mfd/
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
20 * The callback function is called in interrupt context and the data payload is
29 * dl2n_register_event_cb - register a callback function for an event
31 * @pdev - the sub-device that registers the callback
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/linux-6.12.1/Documentation/leds/
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)
13 registered in the LED subsystem with led_classdev_flash_register function.
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
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/linux-6.12.1/tools/perf/util/
Dsetup.py3 from re import sub
7 # Check if CC has options, as is the case in yocto, where it uses CC="cc --sysroot..."
15 cc_is_clang = b"clang version" in Popen([cc, "-v"], stderr=PIPE).stderr.readline()
19 …cc_output = Popen([cc, cc_options + option, path.join(src_feature_tests, "test-hello.c") ], stderr…
26 vars[var] = sub("-specs=[^ ]+", "", vars[var])
27 if not clang_has_option("-mcet"):
28 vars[var] = sub("-mcet", "", vars[var])
29 if not clang_has_option("-fcf-protection"):
30 vars[var] = sub("-fcf-protection", "", vars[var])
31 if not clang_has_option("-fstack-clash-protection"):
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/linux-6.12.1/arch/sparc/kernel/
Dhelpers.S1 /* SPDX-License-Identifier: GPL-2.0-only */
4 .type __flushw_user,#function
9 1: save %sp, -128, %sp
13 1: sub %g2, 1, %g2
18 .size __flushw_user,.-__flushw_user
27 .type stack_trace_flush,#function
34 sub %g1, 1, %g3
37 sub %g2, 1, %g2
42 sub %g3, 1, %g3
49 .size stack_trace_flush,.-stack_trace_flush
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/linux-6.12.1/scripts/
Dkernel-doc2 # SPDX-License-Identifier: GPL-2.0
11 ## Copyright (C) 2005-2012 Randy Dunlap ##
23 kernel-doc - Print formatted kernel documentation to stdout
27 …kernel-doc [-h] [-v] [-Werror] [-Wall] [-Wreturn] [-Wshort-desc[ription]] [-Wcontents-before-secti…
28 [ -man |
29 -rst [-sphinx-version VERSION] [-enable-lineno] |
30 -none
33 -export |
34 -internal |
35 [-function NAME] ... |
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Dgenerate_initcall_order.pl2 # SPDX-License-Identifier: GPL-2.0
18 my $jobs = {}; # child process pid -> file handle
20 my $results = {}; # object index -> [ { level, secname }, ... ]
24 sub get_online_processors {
39 sub write_results {
45 my $level = $initcalls->{$counter}->{'level'};
47 # section name for the initcall function
48 my $secname = $initcalls->{$counter}->{'module'} . '__' .
50 $initcalls->{$counter}->{'line'} . '_' .
51 $initcalls->{$counter}->{'function'};
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/linux-6.12.1/arch/sparc/lib/
DNGbzero.S1 /* SPDX-License-Identifier: GPL-2.0 */
19 .type NGmemset, #function
32 .type NGbzero, #function
39 * %g7: store-init %asi to use
40 * %o4: non-store-init %asi to use
53 sub %g2, %g1, %g1
54 sub %o1, %g1, %o1
61 andcc %o0, (64 - 1), %g1
64 sub %g2, %g1, %g1
65 sub %o1, %g1, %o1
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DGENbzero.S1 /* SPDX-License-Identifier: GPL-2.0 */
20 .type GENmemset, #function
33 .type GENbzero, #function
52 sub %g2, %g1, %g1
53 sub %o1, %g1, %o1
60 andcc %o0, (64 - 1), %g1
63 sub %g2, %g1, %g1
64 sub %o1, %g1, %o1
71 andn %o1, (64 - 1), %g1
72 sub %o1, %g1, %o1
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/linux-6.12.1/arch/mips/include/asm/
Dasm.h14 * away by gas in -O mode. These nops are however required to fill delay
21 #include <asm/asm-eva.h>
22 #include <asm/isa-rev.h>
42 * LEAF - declare leaf routine
48 .type symbol, @function; \
55 * NESTED - declare nested routine entry point
61 .type symbol, @function; \
68 * END - mark end of function
70 #define END(function) \
72 .end function; \
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/linux-6.12.1/Documentation/devicetree/bindings/pinctrl/
Dabilis,tb10x-iomux.txt5 -------------------
7 - compatible: should be "abilis,tb10x-iomux";
8 - reg: should contain the physical address and size of the pin controller's
12 Function definitions
13 --------------------
15 Functions are defined (and referenced) by sub-nodes of the pin controller.
16 Every sub-node defines exactly one function (implying a set of pins).
17 Every function is associated to one named pin group inside the pin controller
19 controller sub-nodes.
21 Required function definition subnode properties:
[all …]
Dimg,pistachio-pinctrl.txt8 each. The GPIO banks are represented as sub-nodes of the pad controller node.
10 Please refer to pinctrl-bindings.txt, ../gpio/gpio.txt, and
11 ../interrupt-controller/interrupts.txt for generic information regarding
15 --------------------------------------------
16 - compatible: "img,pistachio-system-pinctrl".
17 - reg: Address range of the pinctrl registers.
19 Required properties for GPIO bank sub-nodes:
20 --------------------------------------------
21 - interrupts: Interrupt line for the GPIO bank.
22 - gpio-controller: Indicates the device is a GPIO controller.
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Drenesas,rza1-ports.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/pinctrl/renesas,rza1-ports.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jacopo Mondi <jacopo+renesas@jmondi.org>
11 - Geert Uytterhoeven <geert+renesas@glider.be>
16 Pin multiplexing and GPIO configuration is performed on a per-pin basis
17 writing configuration values to per-port register sets.
19 function (port mode) or in alternate function mode.
20 Up to 8 different alternate function modes exist for each single pin.
[all …]
/linux-6.12.1/drivers/gpu/drm/display/
Ddrm_dp_aux_bus.c1 // SPDX-License-Identifier: GPL-2.0
31 * dp_aux_ep_match() - The match function for the dp_aux_bus.
41 return !!of_match_device(drv->of_match_table, dev); in dp_aux_ep_match()
45 * dp_aux_ep_probe() - The probe function for the dp_aux_bus.
54 struct dp_aux_ep_driver *aux_ep_drv = to_dp_aux_ep_drv(dev->driver); in dp_aux_ep_probe()
64 ret = aux_ep_drv->probe(aux_ep); in dp_aux_ep_probe()
68 if (aux_ep_with_data->done_probing) { in dp_aux_ep_probe()
69 ret = aux_ep_with_data->done_probing(aux_ep->aux); in dp_aux_ep_probe()
73 * -EPROBE_DEFER to us. If it does, we treat it as an in dp_aux_ep_probe()
74 * error. Passing it on as-is would cause the _panel_ in dp_aux_ep_probe()
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/linux-6.12.1/arch/hexagon/mm/
Dcopy_from_user.S1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
16 * Therefore, we duplicate the function, and handle faulting addresses
17 * differently for each function
48 /* Normal copy loops. Do epilog. Use src-src_sav to compute distance */
49 /* X - (A - B) == X + B - A */
54 r2 += sub(src_sav,src)
64 r2 += sub(src_sav,src)
74 r2 += sub(src_sav,src)
84 r2 += sub(src_sav,src)
/linux-6.12.1/drivers/base/
Dauxiliary.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2019-2020 Intel Corporation
5 * Please see Documentation/driver-api/auxiliary_bus.rst for more information.
27 * interface for another subsystem to drive (e.g. SIOV Physical Function export
28 * Virtual Function management). A split of the functionality into child-
29 * devices representing sub-domains of functionality makes it possible to
30 * compartmentalize, layer, and distribute domain-specific concerns via a Linux
31 * device-driver model.
38 * and focused on hardware-specific control and communication.
42 * an auxiliary_device within other domain-specific structures and the use of
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/linux-6.12.1/arch/arm64/kernel/
Dentry-ftrace.S1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * arch/arm64/kernel/entry-ftrace.S
11 #include <asm/asm-offsets.h>
18 * Due to -fpatchable-function-entry=2, the compiler has placed two NOPs before
19 * the regular function prologue. For an enabled callsite, ftrace_init_nop() and
25 * Each instrumented function follows the AAPCS, so here x0-x8 and x18-x30 are
26 * live (x18 holds the Shadow Call Stack pointer), and x9-x17 are safe to
41 * The literal pointer to the ops is at an 8-byte aligned boundary
47 * aligning to an 8-byte boundary and subtracting 16. We do the
52 ldr x11, [x11, #-(4 * AARCH64_INSN_SIZE)] // op
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/linux-6.12.1/tools/perf/pmu-events/
Dmetric.py1 # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
13 def ToPerfJson(self) -> str:
17 def ToPython(self) -> str:
25 def Equals(self, other) -> bool:
29 def Substitute(self, name: str, expression: 'Expression') -> 'Expression':
32 def __str__(self) -> str:
35 def __or__(self, other: Union[int, float, 'Expression']) -> 'Operator':
38 def __ror__(self, other: Union[int, float, 'Expression']) -> 'Operator':
41 def __xor__(self, other: Union[int, float, 'Expression']) -> 'Operator':
44 def __and__(self, other: Union[int, float, 'Expression']) -> 'Operator':
[all …]

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