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/linux/Documentation/devicetree/bindings/display/
H A Ddsi-controller.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/display/dsi-controller.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Linus Walleij <linus.walleij@linaro.org>
26 reg-property set to the virtual channel number, usually there is just
33 clock-master:
42 "#address-cells":
45 "#size-cells":
49 "^panel@[0-3]$":
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/linux/Documentation/devicetree/bindings/display/panel/
H A Dsony,acx424akp.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
15 - Linus Walleij <linus.walleij@linaro.org>
18 - $ref: panel-common.yaml#
23 - sony,acx424akp
24 - sony,acx424akm
29 reset-gpios: true
30 vddi-supply:
32 enforce-video-mode: true
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/linux/Documentation/driver-api/
H A Ddevice_link.rst17 Secondly, the driver core by default does not enforce any driver presence
57 device ``->probe`` callback or a boot-time PCI quirk.
61 ``->probe`` callback while the supplier hasn't started to probe yet: Had the
65 non-presence. [Note that it is valid to create a link from the consumer's
66 ``->probe`` callback while the supplier is still probing, but the consumer must
72 is added in the ``->probe`` callback of the supplier or consumer driver, it is
73 typically deleted in its ``->remove`` callback for symmetry. That way, if the
87 link is added from the consumer's ``->probe`` callback: ``DL_FLAG_RPM_ACTIVE``
93 Similarly, when the device link is added from supplier's ``->probe`` callback,
125 :c:func:`device_link_add()` may cause the PM-runtime usage counter of the
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/linux/drivers/gpu/drm/panel/
H A Dpanel-novatek-nt35560.c1 // SPDX-License-Identifier: GPL-2.0+
3 * MIPI-DSI Novatek NT35560-based panel controller.
6 * Sony ACX424AKM - a 480x854 AMOLED DSI panel
7 * Sony ACX424AKP - a 480x864 AMOLED DSI panel
9 * Copyright (C) Linaro Ltd. 2019-2021
11 * Based on code and know-how from Marcus Lorentzon
12 * Copyright (C) ST-Ericsson SA 2010
13 * Based on code and know-how from Johan Olson and Joakim Wesslen
23 #include <video/mipi_display.h>
77 * command mode using the maximum HS frequency.
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H A Dpanel-edp.c17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
34 #include <video/display_timing.h>
35 #include <video/of_display_timing.h>
36 #include <video/videomode.h>
46 * struct panel_delay - Describes delays for a simple panel.
59 * hpd_absent. While that works, it's non-ideal.
68 * This is T3-max on eDP timing diagrams or the delay from power on
79 * This is (T3+T4+T5+T6+T8)-min on eDP timing diagrams or after the
114 * // enforce prepare_to_enable min time
127 * video data.
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/linux/Documentation/admin-guide/media/
H A Dimx.rst1 .. SPDX-License-Identifier: GPL-2.0
3 i.MX Video Capture Driver
7 ------------
15 - Image DMA Controller (IDMAC)
16 - Camera Serial Interface (CSI)
17 - Image Converter (IC)
18 - Sensor Multi-FIFO Controller (SMFC)
19 - Image Rotator (IRT)
20 - Video De-Interlacing or Combining Block (VDIC)
23 memory. Various dedicated DMA channels exist for both video capture and
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/linux/drivers/media/pci/cx18/
H A Dcx18-av-core.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Derived from cx25840-core.c
11 #include "cx18-driver.h"
12 #include "cx18-io.h"
13 #include "cx18-cards.h"
106 /* xtal * 0xe.2913d68/0x16 = 48000 * 384: 406 MHz pre post-div*/ in cx18_av_init()
127 /* enable sleep mode - register appears to be read only... */ in cx18_av_initialize()
129 /* disable sleep mode */ in cx18_av_initialize()
159 /* video output drive strength */ in cx18_av_initialize()
162 /* reset video */ in cx18_av_initialize()
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/linux/Documentation/userspace-api/media/v4l/
H A Dext-ctrls-camera.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _camera-controls:
13 .. _camera-control-id:
23 .. _v4l2-exposure-auto-type:
28 enum v4l2_exposure_auto_type -
37 .. flat-table::
38 :header-rows: 0
39 :stub-columns: 0
41 * - ``V4L2_EXPOSURE_AUTO``
42 - Automatic exposure time, automatic iris aperture.
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/linux/arch/x86/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0
4 bool "64-bit kernel" if "$(ARCH)" = "x86"
7 Say yes to build a 64-bit kernel - formerly known as x86_64
8 Say no to build a 32-bit kernel - formerly known as i386
13 # Options that are inherently 32-bit kernel only:
27 # Options that are inherently 64-bit kernel only:
55 # ported to 32-bit as well. )
153 # Word-size accesses may read uninitialized data past the trailing \0
332 default "elf32-i386" if X86_32
333 default "elf64-x86-64" if X86_64
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/linux/Documentation/networking/
H A Dudplite.rst1 .. SPDX-License-Identifier: GPL-2.0
4 The UDP-Lite protocol (RFC 3828)
8 UDP-Lite is a Standards-Track IETF transport protocol whose characteristic
9 is a variable-length checksum. This has advantages for transport of multimedia
10 (video, VoIP) over wireless networks, as partly damaged packets can still be
14 For in-depth information, you can consult:
16 - The UDP-Lite Homepage:
17 http://web.archive.org/web/%2E/http://www.erg.abdn.ac.uk/users/gerrit/udp-lite/
21 - The UDP-Lite HOWTO on
22 …http://web.archive.org/web/%2E/http://www.erg.abdn.ac.uk/users/gerrit/udp-lite/files/UDP-Lite-HOWT…
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/linux/drivers/clk/
H A Dclk-ast2600.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 #define pr_fmt(fmt) "clk-ast2600: " fmt
14 #include <dt-bindings/clock/ast2600-clock.h>
16 #include "clk-aspeed.h"
20 * explicitly-configured clocks (ASPEED_CLK_HPLL and up).
82 * IP. This allows us to enforce the ordering:
94 * handled by using -1 as the index for the reset, and the consumer must
104 [ASPEED_CLK_GATE_MCLK] = { 0, -1, "mclk-gate", "mpll", CLK_IS_CRITICAL }, /* SDRAM */
105 [ASPEED_CLK_GATE_ECLK] = { 1, 6, "eclk-gate", "eclk", 0 }, /* Video Engine */
106 [ASPEED_CLK_GATE_GCLK] = { 2, 7, "gclk-gate", NULL, 0 }, /* 2D engine */
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/linux/Documentation/admin-guide/
H A Dkernel-parameters.txt16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nospcr -- disable console in ACPI SPCR table as
40 { vendor | video | native | none }
41 If set to vendor, prefer vendor-specific driver
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/linux/drivers/gpu/drm/amd/amdgpu/
H A Damdgpu_drv.c58 * - 3.0.0 - initial driver
59 * - 3.1.0 - allow reading more status registers (GRBM, SRBM, SDMA, CP)
60 * - 3.2.0 - GFX8: Uses EOP_TC_WB_ACTION_EN, so UMDs don't have to do the same
62 * - 3.3.0 - Add VM support for UVD on supported hardware.
63 * - 3.4.0 - Add AMDGPU_INFO_NUM_EVICTIONS.
64 * - 3.5.0 - Add support for new UVD_NO_OP register.
65 * - 3.6.0 - kmd involves use CONTEXT_CONTROL in ring buffer.
66 * - 3.7.0 - Add support for VCE clock list packet
67 * - 3.8.0 - Add support raster config init in the kernel
68 * - 3.9.0 - Add support for memory query info about VRAM and GTT.
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/linux/drivers/media/platform/ti/omap3isp/
H A Disppreview.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * TI OMAP3 ISP driver - Preview module
26 { /* RGB-RGB Matrix */
38 {-38, -75, 112},
39 {112, -94 , -18}
85 * -------------------------------------------------------------
125 * Default Gamma Correction Table - All components
146 * preview_config_luma_enhancement - Configure the Luminance Enhancement table
153 const struct omap3isp_prev_luma *yt = &params->luma; in preview_config_luma_enhancement()
159 isp_reg_writel(isp, yt->table[i], in preview_config_luma_enhancement()
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/linux/drivers/video/fbdev/
H A Dbroadsheetfb.c2 * broadsheetfb.c -- FB driver for E-Ink Broadsheet controller
35 #include <video/broadsheetfb.h>
121 par->board->set_ctl(par, BS_WR, 0); in broadsheet_gpio_issue_data()
122 par->board->set_hdb(par, data); in broadsheet_gpio_issue_data()
123 par->board->set_ctl(par, BS_WR, 1); in broadsheet_gpio_issue_data()
128 par->board->set_ctl(par, BS_DC, 0); in broadsheet_gpio_issue_cmd()
134 par->board->wait_for_rdy(par); in broadsheet_gpio_send_command()
136 par->board->set_ctl(par, BS_CS, 0); in broadsheet_gpio_send_command()
138 par->board->set_ctl(par, BS_DC, 1); in broadsheet_gpio_send_command()
139 par->board->set_ctl(par, BS_CS, 1); in broadsheet_gpio_send_command()
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H A Dudlfb.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * udlfb.c -- Framebuffer driver for DisplayLink USB controller
10 * usb-skeleton by GregKH.
12 * Device-specific portions based on information from Displaylink, with work
27 #include <video/udlfb.h>
48 * There are many DisplayLink-based graphics products, all with unique PIDs.
49 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
114 * ----- -----------------------------
200 while (actual_count--) { in dlfb_lfsr16()
219 * This takes a standard fbdev screeninfo struct and all of its monitor mode
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H A Dimsttfb.c2 * drivers/video/imsttfb.c -- frame buffer device for IMS TwinTurbo
40 #define eieio() /* Enforce In-order Execution of I/O */
172 TVPPMASK = 0x08, /* 2 Pixel Read-Mask */
182 TVPCXPOL = 0x30, /* 12 Cursor-Position X LSB */
183 TVPCXPOH = 0x34, /* 13 Cursor-Position X MSB */
184 TVPCYPOL = 0x38, /* 14 Cursor-Position Y LSB */
185 TVPCYPOH = 0x3c, /* 15 Cursor-Position Y MSB */
204 TVPIRCKL = 0x30, /* Color-Key Overlay Low */
205 TVPIRCKH = 0x31, /* Color-Key Overlay High */
206 TVPIRCRL = 0x32, /* Color-Key Red Low */
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/linux/drivers/gpu/drm/
H A Ddrm_bridge.c17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
25 #include <linux/media-bus-format.h>
50 * [ CRTC ---> ] Encoder ---> Bridge A ---> Bridge B
76 * functions to perform mode validation and fixup (through
77 * drm_bridge_chain_mode_valid() and drm_atomic_bridge_chain_check()), mode
88 * drm_atomic_helper_commit_modeset_disables() (either directly in hand-rolled
89 * commit check and commit tail handlers, or through the higher-level
98 * connector-related operations exposed by the bridge (see the overview
110 * - The upstream driver doesn't use the component framework and isn't a
111 * MIPI-DSI host. In this case, the bridge driver will probe at some
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/linux/drivers/media/i2c/cx25840/
H A Dcx25840-core.c1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* cx25840 - Conexant CX25840 audio/video decoder driver
10 * - cleanup/rewrite for V4L2 API (2005)
36 #include <media/v4l2-common.h>
37 #include <media/drv-intf/cx25840.h>
39 #include "cx25840-core.h"
41 MODULE_DESCRIPTION("Conexant CX25840 audio/video decoder driver");
73 /* ----------------------------------------------------------------------- */
107 msgs[0].addr = client->addr; in cx25840_read()
113 msgs[1].addr = client->addr; in cx25840_read()
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/linux/drivers/staging/media/atomisp/pci/
H A Dsh_css_internal.h1 /* SPDX-License-Identifier: GPL-2.0 */
47 * TODO: Enforce the limitation above.
98 #define CALC_ALIGNMENT_MEMBER(x, y) (CEIL_MUL(x, y) - x)
168 /* Note that the struct below should only consist of ia_css_ptr-es
316 * The DMA software-mask,
319 * Bit 15...08: reading-request enabling bits for DMA channel 7..0
320 * Bit 07...00: writing-request enabling bits for DMA channel 7..0
352 host (true) or when they are passed to the preview/video pipe
364 set[SH_CSS_MAX_IF_CONFIGS]; /* CSI-2 port is used as index. */
387 ((SH_CSS_PIPE_CONFIG_SAMPLE_PARAMS << SH_CSS_MAX_SP_THREADS) - 1)
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/linux/drivers/media/i2c/
H A Dmt9m111.c1 // SPDX-License-Identifier: GPL-2.0-only
14 #include <linux/v4l2-mediabus.h>
18 #include <media/v4l2-async.h>
19 #include <media/v4l2-common.h>
20 #include <media/v4l2-ctrls.h>
21 #include <media/v4l2-device.h>
22 #include <media/v4l2-event.h>
23 #include <media/v4l2-fwnode.h>
245 /* user point of view - 0: falling 1: rising edge */
290 return mt9m111->fmt; in mt9m111_find_datafmt()
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/linux/Documentation/admin-guide/sysctl/
H A Dkernel.rst5 .. See scripts/check-sysctl-docs to keep this up to date
13 Documentation/admin-guide/sysctl/index.rst.
15 ------------------------------------------------------------------------------
39 If BSD-style process accounting is enabled these values control
58 See Documentation/power/video.rst. This allows the video resume mode to be set,
71 The machine hardware name, the same output as ``uname -m``
129 Ctrl-Alt-Delete). Writing a value to this file which doesn't
130 correspond to a running process will result in ``-ESRCH``.
132 See also `ctrl-alt-del`_.
170 %d dump mode, matches ``PR_SET_DUMPABLE`` and
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/linux/drivers/media/usb/gspca/
H A Dov519.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright (C) 2008-2011 Jean-François Moine <moinejf@free.fr>
8 * This module is adapted from the ov51x-jpeg package, which itself
13 * Copyright (c) 1999-2006 Mark W. McClelland
20 * ov51x-jpeg original copyright is:
22 * Copyright (c) 2004-2007 Romain Beauxis <toots@rastageeks.org>
38 MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
482 /*jfm: this value does not work for 800x600 - see isoc_init */
539 #define OV7670_R14_COM9 0x14 /* Control 9 - gain ceiling */
550 #define OV7670_R26_VPT 0x26 /* AGC/AEC fast mode op region */
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/linux/sound/soc/codecs/
H A Dwm8994.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * wm8994.c -- WM8994 ALSA SoC Audio driver
5 * Copyright 2009-12 Wolfson Microelectronics plc
114 struct wm8994 *control = wm8994->wm8994; in wm8958_micd_set_rate()
120 idle = !wm8994->jack_mic; in wm8958_micd_set_rate()
124 sysclk = wm8994->aifclk[1]; in wm8958_micd_set_rate()
126 sysclk = wm8994->aifclk[0]; in wm8958_micd_set_rate()
128 if (control->pdata.micd_rates) { in wm8958_micd_set_rate()
129 rates = control->pdata.micd_rates; in wm8958_micd_set_rate()
130 num_rates = control->pdata.num_micd_rates; in wm8958_micd_set_rate()
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/linux/drivers/gpu/drm/xe/
H A Dxe_oa.c1 // SPDX-License-Identifier: MIT
3 * Copyright © 2023-2024 Intel Corporation
145 return tail >= head ? tail - head : in xe_oa_circ_diff()
146 tail + stream->oa_buffer.circ_size - head; in xe_oa_circ_diff()
151 return ptr + n >= stream->oa_buffer.circ_size ? in xe_oa_circ_incr()
152 ptr + n - stream->oa_buffer.circ_size : ptr + n; in xe_oa_circ_incr()
160 kfree(oa_config->regs); in xe_oa_config_release()
170 kref_put(&oa_config->ref, xe_oa_config_release); in xe_oa_config_put()
175 return kref_get_unless_zero(&oa_config->ref) ? oa_config : NULL; in xe_oa_config_get()
183 oa_config = idr_find(&oa->metrics_idr, metrics_set); in xe_oa_get_oa_config()
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