kernel/linux.git/drivers/video/backlight, branch v6.18.21

backlight: qcom-wled: Change PM8950 WLED configurations

2026-02-26T22:59:35+00:00

[ Upstream commit 83333aa97441ba7ce32b91e8a007c72d316a1c67 ] PMI8950 WLED needs same configurations as PMI8994 WLED. Fixes: 10258bf4534b ("backlight: qcom-wled: Add PMI8950 compatible") Signed-off-by: Barnabás Czémán Reviewed-by: Konrad Dybcio Reviewed-by: Daniel Thompson (RISCstar) Link: https://patch.msgid.link/20260116-pmi8950-wled-v3-4-e6c93de84079@mainlining.org Signed-off-by: Lee Jones Signed-off-by: Sasha Levin

backlight: qcom-wled: Support ovp values for PMI8994

2026-02-26T22:59:35+00:00

[ Upstream commit f29f972a6e7e3f187ea4d89b98a76c1981ca4d53 ] WLED4 found in PMI8994 supports different ovp values. Fixes: 6fc632d3e3e0 ("video: backlight: qcom-wled: Add PMI8994 compatible") Signed-off-by: Barnabás Czémán Reviewed-by: Konrad Dybcio Reviewed-by: Daniel Thompson (RISCstar) Link: https://patch.msgid.link/20260116-pmi8950-wled-v3-2-e6c93de84079@mainlining.org Signed-off-by: Lee Jones Signed-off-by: Sasha Levin

backlight: led-bl: Add devlink to supplier LEDs

2025-12-18T13:03:17+00:00

[ Upstream commit 9341d6698f4cfdfc374fb6944158d111ebe16a9d ] LED Backlight is a consumer of one or multiple LED class devices, but devlink is currently unable to create correct supplier-producer links when the supplier is a class device. It creates instead a link where the supplier is the parent of the expected device. One consequence is that removal order is not correctly enforced. Issues happen for example with the following sections in a device tree overlay: // An LED driver chip pca9632@62 { compatible = "nxp,pca9632"; reg = <0x62>; // ... addon_led_pwm: led-pwm@3 { reg = <3>; label = "addon:led:pwm"; }; }; backlight-addon { compatible = "led-backlight"; leds = <&addon_led_pwm>; brightness-levels = <255>; default-brightness-level = <255>; }; In this example, the devlink should be created between the backlight-addon (consumer) and the pca9632@62 (supplier). Instead it is created between the backlight-addon (consumer) and the parent of the pca9632@62, which is typically the I2C bus adapter. On removal of the above overlay, the LED driver can be removed before the backlight device, resulting in: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 ... Call trace: led_put+0xe0/0x140 devm_led_release+0x6c/0x98 Another way to reproduce the bug without any device tree overlays is unbinding the LED class device (pca9632@62) before unbinding the consumer (backlight-addon): echo 11-0062 >/sys/bus/i2c/drivers/leds-pca963x/unbind echo ...backlight-dock >/sys/bus/platform/drivers/led-backlight/unbind Fix by adding a devlink between the consuming led-backlight device and the supplying LED device, as other drivers and subsystems do as well. Fixes: ae232e45acf9 ("backlight: add led-backlight driver") Signed-off-by: Luca Ceresoli Reviewed-by: Daniel Thompson (RISCstar) Reviewed-by: Herve Codina Tested-by: Alexander Sverdlin Link: https://patch.msgid.link/20250519-led-backlight-add-devlink-to-supplier-class-device-v6-1-845224aeb2ce@bootlin.com Signed-off-by: Lee Jones Signed-off-by: Sasha Levin

backlight: rt4831: Include

2025-09-16T16:05:19+00:00

Include to declare struct of_device_id. Avoids dependency on backlight header to include it. Signed-off-by: Thomas Zimmermann Reviewed-by: "Daniel Thompson (RISCstar)" Link: https://lore.kernel.org/r/20250715122643.137027-15-tzimmermann@suse.de Signed-off-by: Lee Jones

backlight: rave-sp: Include and

2025-09-16T16:05:19+00:00

Include to declare struct device_node and include to declare struct of_device_id. Avoids dependency on backlight header to include it. Signed-off-by: Thomas Zimmermann Reviewed-by: "Daniel Thompson (RISCstar)" Link: https://lore.kernel.org/r/20250715122643.137027-14-tzimmermann@suse.de Signed-off-by: Lee Jones

backlight: led_bl: Include

2025-09-16T16:05:19+00:00

Include to declare struct of_count_phandle_with_args(). Avoids dependency on backlight header to include it. Signed-off-by: Thomas Zimmermann Reviewed-by: "Daniel Thompson (RISCstar)" Link: https://lore.kernel.org/r/20250715122643.137027-13-tzimmermann@suse.de Signed-off-by: Lee Jones

backlight: ktd2801: Include

2025-09-16T16:05:19+00:00

Include to declare struct of_device_id. Avoids dependency on backlight header to include it. Signed-off-by: Thomas Zimmermann Reviewed-by: Nick Chan Reviewed-by: "Daniel Thompson (RISCstar)" Acked-by: Duje Mihanović Link: https://lore.kernel.org/r/20250715122643.137027-12-tzimmermann@suse.de Signed-off-by: Lee Jones

backlight: jornada720: Include

2025-09-16T16:05:19+00:00

Include to declare IOMEM(). Avoids dependency on backlight header to include it. Signed-off-by: Thomas Zimmermann Reviewed-by: "Daniel Thompson (RISCstar)" Link: https://lore.kernel.org/r/20250715122643.137027-11-tzimmermann@suse.de Signed-off-by: Lee Jones

backlight: da9052_bl: Include

2025-09-16T16:05:19+00:00

Include to declare struct platform_device_id. Avoids dependency on backlight header to include it. Signed-off-by: Thomas Zimmermann Reviewed-by: "Daniel Thompson (RISCstar)" Link: https://lore.kernel.org/r/20250715122643.137027-10-tzimmermann@suse.de Signed-off-by: Lee Jones

backlight: as3711_bl: Include

2025-09-16T16:05:19+00:00

Include to declare various OF helpers. Avoids dependency on backlight header to include it. Signed-off-by: Thomas Zimmermann Reviewed-by: "Daniel Thompson (RISCstar)" Link: https://lore.kernel.org/r/20250715122643.137027-9-tzimmermann@suse.de Signed-off-by: Lee Jones