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/linux/Documentation/ABI/testing/
H A Dsysfs-class-backlight1 What: /sys/class/backlight/<backlight>/scale
28 What: /sys/class/backlight/<backlight>/ambient_light_level
49 What: /sys/class/backlight/<backlight>/ambient_light_zone
57 backlight operates.
85 /sys/class/backlight/<backlight>/max_brightness to
86 /sys/class/backlight/<backlight>/brightness.
88 What: /sys/class/backlight/<backlight>/<ambient light zone>_max
94 on this <backlight>. Values are between 0 and 127. This file
106 daylight /sys/class/backlight/<backlight>/daylight_max
107 office /sys/class/backlight/<backlight>/office_max
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H A Dsysfs-class-backlight-driver-lm35331 What: /sys/class/backlight/<backlight>/als_channel
10 0 out_current0 (backlight 0)
11 1 out_current1 (backlight 1)
14 What: /sys/class/backlight/<backlight>/als_en
21 What: /sys/class/backlight/<backlight>/id
26 Get the id of this backlight (0, 1).
28 What: /sys/class/backlight/<backlight>/linear
40 What: /sys/class/backlight/<backlight>/pwm
H A Dsysfs-class-backlight-lm36391 sysfs interface for Texas Instruments lm3639 backlight + flash led driver chip
4 What: /sys/class/backlight/<backlight>/bled_mode
9 (WO) Write to the backlight mapping mode. The backlight current
/linux/drivers/gpu/drm/i915/display/
H A Dintel_dp_aux_backlight.c157 panel->backlight.edp.intel_cap.sdr_uses_aux = in intel_dp_aux_supports_hdr_backlight()
159 panel->backlight.edp.intel_cap.supports_2084_decode = in intel_dp_aux_supports_hdr_backlight()
161 panel->backlight.edp.intel_cap.supports_2020_gamut = in intel_dp_aux_supports_hdr_backlight()
163 panel->backlight.edp.intel_cap.supports_segmented_backlight = in intel_dp_aux_supports_hdr_backlight()
165 panel->backlight.edp.intel_cap.supports_sdp_colorimetry = in intel_dp_aux_supports_hdr_backlight()
167 panel->backlight.edp.intel_cap.supports_tone_mapping = in intel_dp_aux_supports_hdr_backlight()
190 if (!panel->backlight.edp.intel_cap.sdr_uses_aux) { in intel_dp_aux_hdr_get_backlight()
191 u32 pwm_level = panel->backlight.pwm_funcs->get(connector, pipe); in intel_dp_aux_hdr_get_backlight()
197 return panel->backlight.max; in intel_dp_aux_hdr_get_backlight()
235 panel->backlight.edp.intel_cap.sdr_uses_aux) { in intel_dp_aux_hdr_set_backlight()
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/linux/drivers/video/backlight/
H A DKconfig17 (contrast and applying power to the LCD (not to the backlight!)).
140 backlight. This includes support for brightness and power.
151 This provides a backlight control internal to the Atmel LCDC
153 so it controls the backlight brightness, select this option to
154 export this as a PWM-based backlight control.
164 If you have a LCD backlight connected to the WLED output of AW99706
171 If you have a LCD backlight connected to the BRIGHT output of
178 tristate "iPAQ microcontroller backlight driver"
182 Say y to enable the backlight driver for Compaq iPAQ handheld
190 Say y to enabled the backlight driver for the Kinetic KTD253
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H A DMakefile31 obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
39 obj-$(CONFIG_BACKLIGHT_KTD253) += ktd253-backlight.o
40 obj-$(CONFIG_BACKLIGHT_KTD2801) += ktd2801-backlight.o
53 obj-$(CONFIG_BACKLIGHT_MT6370) += mt6370-backlight.o
58 obj-$(CONFIG_BACKLIGHT_RT4831) += rt4831-backlight.o
61 obj-$(CONFIG_BACKLIGHT_SKY81452) += sky81452-backlight.o
65 obj-$(CONFIG_BACKLIGHT_RAVE_SP) += rave-sp-backlight.o
/linux/drivers/hid/
H A Dhid-picolcd_backlight.c71 data->backlight = bdev; in picolcd_init_backlight()
78 struct backlight_device *bdev = data->backlight; in picolcd_exit_backlight()
80 data->backlight = NULL; in picolcd_exit_backlight()
86 if (!data->backlight) in picolcd_resume_backlight()
88 return picolcd_set_brightness(data->backlight); in picolcd_resume_backlight()
95 if (!data->backlight) in picolcd_suspend_backlight()
98 data->backlight->props.power = BACKLIGHT_POWER_OFF; in picolcd_suspend_backlight()
99 picolcd_set_brightness(data->backlight); in picolcd_suspend_backlight()
100 data->lcd_power = data->backlight->props.power = bl_power; in picolcd_suspend_backlight()
/linux/Documentation/devicetree/bindings/mfd/
H A Dsky81452.txt8 - backlight : container node for backlight following the binding
9 in leds/backlight/sky81452-backlight.txt
19 backlight {
20 compatible = "skyworks,sky81452-backlight";
21 name = "pwm-backlight";
H A Dti-lmu.txt47 - backlight: All LMU devices have backlight child nodes.
60 [1] ../leds/backlight/ti-lmu-backlight.txt
106 backlight {
107 compatible = "ti,lm3631-backlight";
148 backlight {
149 compatible = "ti,lm3632-backlight";
152 pwm-names = "lmu-backlight";
167 backlight {
168 compatible = "ti,lm3633-backlight";
212 backlight {
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/linux/drivers/media/usb/gspca/gl860/
H A Dgl860-ov2640.c175 sd->vcur.backlight = 32; in ov2640_init_settings()
186 sd->vmax.backlight = 64; in ov2640_init_settings()
239 sd->vold.backlight = -1; in ov2640_init_pre_alt()
339 s32 backlight = sd->vcur.backlight; in ov2640_camera_settings() local
350 if (backlight != sd->vold.backlight) { in ov2640_camera_settings()
352 if (backlight < 0 || backlight > sd->vmax.backlight) in ov2640_camera_settings()
353 backlight = 0; in ov2640_camera_settings()
357 ctrl_out(gspca_dev, 0x40, 1, 0x601e + backlight , 0x0024, in ov2640_camera_settings()
359 ctrl_out(gspca_dev, 0x40, 1, 0x601e + backlight - 10, 0x0025, in ov2640_camera_settings()
457 if (backlight != sd->vold.backlight) { in ov2640_camera_settings()
[all …]
H A Dgl860-mi1320.c204 sd->vcur.backlight = 0; in mi1320_init_settings()
216 sd->vmax.backlight = 2; in mi1320_init_settings()
281 sd->vold.backlight = -1; in mi1320_init_pre_alt()
367 s32 backlight = sd->vcur.backlight; in mi1320_camera_settings() local
482 if (backlight != sd->vold.backlight) { in mi1320_camera_settings()
483 sd->vold.backlight = backlight; in mi1320_camera_settings()
484 if (backlight < 0 || backlight > sd->vmax.backlight) in mi1320_camera_settings()
485 backlight = 0; in mi1320_camera_settings()
487 backlight = tbl_backlight[backlight]; in mi1320_camera_settings()
492 ctrl_out(gspca_dev, 0x40, 1, 0xba80 + backlight, 0x00f1, in mi1320_camera_settings()
/linux/tools/arch/x86/dell-uart-backlight-emulator/
H A DMakefile4 dell-uart-backlight-emulator: dell-uart-backlight-emulator.c
15 @rm -f dell-uart-backlight-emulator
17 install : dell-uart-backlight-emulator
19 install -m 755 -p dell-uart-backlight-emulator $(DESTDIR)$(BINDIR)/dell-uart-backlight-emulator
H A DREADME1 Emulator for DELL0501 UART attached backlight controller
4 Dell All In One (AIO) models released after 2017 use a backlight controller
13 the backlight controller board attached.
16 the drivers/platform/x86/dell/dell-uart-backlight.c driver without access
32 ./dell-uart-backlight-emulator <path-to-/dev/tty*S#-for-second-port>
36 ./dell-uart-backlight-emulator /dev/ttyUSB0
38 And then (re)load the dell-uart-backlight driver:
40 sudo rmmod dell-uart-backlight; sudo modprobe dell-uart-backlight dyndbg
44 should be a /sys/class/backlight/dell_uart_backlight/ directory now
/linux/Documentation/devicetree/bindings/leds/backlight/
H A Dsky81452-backlight.txt1 SKY81452-backlight bindings
4 - compatible : Must be "skyworks,sky81452-backlight"
7 - name : Name of backlight device. Default is 'lcd-backlight'.
22 backlight {
23 compatible = "skyworks,sky81452-backlight";
24 name = "pwm-backlight";
H A D88pm860x.txt1 88pm860x-backlight bindings
4 - marvell,88pm860x-iset: Current supplies on backlight device.
5 - marvell,88pm860x-pwm: PWM frequency on backlight device.
10 backlight-0 {
14 backlight-2 {
/linux/Documentation/gpu/
H A Dbacklight.rst5 .. kernel-doc:: drivers/video/backlight/backlight.c
8 .. kernel-doc:: include/linux/backlight.h
11 .. kernel-doc:: drivers/video/backlight/backlight.c
/linux/arch/arm64/boot/dts/rockchip/
H A Dpx30-engicam-edimm2.2.dtsi10 backlight: backlight { label
11 compatible = "pwm-backlight";
17 backlight = <&backlight>;
/linux/Documentation/firmware-guide/acpi/
H A Dvideo_extension.rst14 The ACPI video driver does 3 things regarding backlight control.
16 Export a sysfs interface for user space to control backlight level
20 command line is not present, the driver will register a backlight device
21 and set the required backlight operation structure for it for the sysfs
23 directory named acpi_videoX under /sys/class/backlight.
25 The backlight sysfs interface has a standard definition here:
26 Documentation/ABI/stable/sysfs-class-backlight.
42 Note that ACPI video backlight driver will always use index for
108 Once user space tool receives this event, it can modify the backlight
111 Change backlight level in the kernel
[all …]
/linux/arch/arm/boot/dts/microchip/
H A Dat91sam9x5dm.dtsi12 backlight: backlight { label
13 compatible = "pwm-backlight";
23 regulator-name = "backlight-power-supply";
31 backlight = <&backlight>;
H A Dat91-dvk_su60_somc_lcm.dtsi11 backlight: backlight { label
12 compatible = "pwm-backlight";
21 backlight = <&backlight>;
/linux/arch/arm64/boot/dts/qcom/
H A Dx1e78100-lenovo-thinkpad-t14s.dts13 backlight: backlight { label
14 compatible = "pwm-backlight";
41 backlight = <&backlight>;
H A Dx1p42100-asus-zenbook-a14-lcd.dts15 backlight: backlight { label
16 compatible = "pwm-backlight";
43 backlight = <&backlight>;
/linux/Documentation/devicetree/bindings/leds/
H A Dleds-lm36274.txt4 The backlight boost provides the power to bias four parallel LED strings with
14 Required backlight properties:
16 "ti,lm36274-backlight"
24 Optional backlight properties:
70 backlight {
73 compatible = "ti,lm36274-backlight";
79 linux,default-trigger = "backlight";
/linux/drivers/platform/x86/
H A Dmsi-wmi.c100 static struct backlight_device *backlight; variable
240 (backlight || (key->code == MSI_KEY_BRIGHTNESSUP || in msi_wmi_notify()
256 backlight = backlight_device_register(DRV_NAME, NULL, NULL, in msi_wmi_backlight_setup()
259 if (IS_ERR(backlight)) in msi_wmi_backlight_setup()
260 return PTR_ERR(backlight); in msi_wmi_backlight_setup()
264 backlight_device_unregister(backlight); in msi_wmi_backlight_setup()
268 backlight->props.brightness = err; in msi_wmi_backlight_setup()
340 if (!event_wmi && !backlight) { in msi_wmi_init()
362 backlight_device_unregister(backlight); in msi_wmi_exit()
/linux/arch/arm/boot/dts/ti/omap/
H A Dmotorola-mapphone-xt8xx.dtsi7 backlight: backlight { label
8 compatible = "led-backlight";
44 backlight = <&backlight>;

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