linux-stable.git/drivers/video/backlight, branch v7.2.4

backlight: aw99706: Honor the core blank state in update_status()

2026-09-07T15:36:55+00:00

commit fbf8b5d251e8b4e1b01c591be313c63cb9e1526a upstream.

update_status() passes props.brightness straight to the hardware and
ignores the power/blank state tracked by the core. Writing 4 to the
bl_power sysfs attribute or blanking the framebuffer therefore leaves
the backlight lit.

Use backlight_get_brightness(), which returns 0 while the device is
blanked.

Fixes: 147b38a5ad06 ("backlight: aw99706: Add support for Awinic AW99706 backlight")
Cc: stable@vger.kernel.org
Signed-off-by: Junjie Cao 
Reviewed-by: Daniel Thompson (RISCstar) 
Link: https://patch.msgid.link/20260804030255.1934470-4-junjie.cao@intel.com
Signed-off-by: Lee Jones 
Signed-off-by: Greg Kroah-Hartman

backlight: aw99706: Fix DT property names to match binding

2026-09-07T15:36:55+00:00

commit daf120e464386f750b3870dc04d5bc6a786f0000 upstream.

The driver reads four tuning properties without the unit suffixes that
the binding mandates: "awinic,sw-freq" instead of "awinic,sw-freq-hz",
"awinic,sw-ilmt" instead of "awinic,sw-ilmt-microamp", "awinic,iled-max"
instead of "awinic,iled-max-microamp", and "awinic,uvlo-thres" instead
of "awinic,uvlo-thres-microvolt".

As a result, device_property_read_u32() never finds these properties in
a binding-conformant device tree and silently falls back to the compiled-in
defaults for switching frequency, switching current limit, max LED current,
and UVLO threshold.

Fix by aligning the property name strings in aw99706_dt_props[] with the
binding. No value/range changes are needed since both sides already use
the same units and enumerations.

Fixes: 147b38a5ad06 ("backlight: aw99706: Add support for Awinic AW99706 backlight")
Cc: stable@vger.kernel.org
Signed-off-by: Junjie Cao 
Reviewed-by: Daniel Thompson (RISCstar) 
Link: https://patch.msgid.link/20260804030255.1934470-2-junjie.cao@intel.com
Signed-off-by: Lee Jones 
Signed-off-by: Greg Kroah-Hartman

Replace by more specific (c files)

2026-07-03T05:38:17+00:00

Replace the #include of  by the more specific
 where applicable. For most cases the include
can be dropped completely, only a few drivers need one or two headers
added.

Acked-by: Danilo Krummrich 
Acked-by: Takashi Sakamoto 
Acked-by: Bjorn Helgaas 
Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König (The Capable Hub)

backlight: Use named initializers for arrays of i2c_device_data

2026-06-11T14:12:12+00:00

While being less compact, using named initializers allows to more easily
see which members of the structs are assigned which value without having
to lookup the declaration of the struct. And it's also more robust
against changes to the struct definition.

The mentioned robustness is relevant for a planned change to struct
i2c_device_id that replaces .driver_data by an anonymous union.

While touching all these arrays, unify usage of whitespace in the list
terminator.

This patch doesn't modify the compiled arrays, only their representation
in source form benefits. The former was confirmed with x86 and arm64
builds.

Signed-off-by: Uwe Kleine-König (The Capable Hub) 
Reviewed-by: Daniel Thompson (RISCstar) 
Link: https://patch.msgid.link/20260518111203.639603-2-u.kleine-koenig@baylibre.com
Signed-off-by: Lee Jones

backlight: cgbc: Remove redundant X86 dependency

2026-05-07T13:25:19+00:00

The backlight driver depends on the MFD cgbc-core driver, which already
depends on X86. The explicit X86 dependency for the backlight driver is
redundant and can be safely removed.

Signed-off-by: Thomas Richard 
Reviewed-by: Daniel Thompson (RISCstar) 
Link: https://patch.msgid.link/20260427-backlight-cgbc-remove-x86-dependency-v2-1-da9f2375a34a@bootlin.com
Signed-off-by: Lee Jones

backlight: Add max25014atg backlight

2026-04-30T13:54:34+00:00

The Maxim MAX25014 is a 4-channel automotive grade backlight driver IC
with integrated boost controller.

Signed-off-by: Maud Spierings 
Reviewed-by: Daniel Thompson (RISCstar) 
Link: https://patch.msgid.link/20260407-max25014-v8-2-14eac7ed673a@gocontroll.com
Signed-off-by: Lee Jones

backlight: ktd2801: Enable BL_CORE_SUSPENDRESUME

2026-04-30T13:34:38+00:00

Boards using this backlight chip do not power the backlight off on
suspend. Enable BL_CORE_SUSPENDRESUME so the chip gets powered off by
the backlight core on suspend.

Tested on samsung,coreprimevelte.

Cc: stable@vger.kernel.org # v6.19
Signed-off-by: Duje Mihanović 
Reviewed-by: Daniel Thompson (RISCstar) 
Link: https://patch.msgid.link/20260328-ktd2801-pm-fix-v1-1-007cb103faeb@dujemihanovic.xyz
Signed-off-by: Lee Jones

backlight: apple_bl: Convert to a platform driver

2026-03-31T10:48:10+00:00

In all cases in which a struct acpi_driver is used for binding a driver
to an ACPI device object, a corresponding platform device is created by
the ACPI core and that device is regarded as a proper representation of
underlying hardware.  Accordingly, a struct platform_driver should be
used by driver code to bind to that device.  There are multiple reasons
why drivers should not bind directly to ACPI device objects [1].

Overall, it is better to bind drivers to platform devices than to their
ACPI companions, so convert the Apple Backlight ACPI driver to a
platform one.

While this is not expected to alter functionality, it changes sysfs
layout and so it will be visible to user space.

Link: https://lore.kernel.org/all/2396510.ElGaqSPkdT@rafael.j.wysocki/ [1]
Signed-off-by: Rafael J. Wysocki 
Reviewed-by: Daniel Thompson (RISCstar) 
Link: https://patch.msgid.link/5084777.GXAFRqVoOG@rafael.j.wysocki
Signed-off-by: Lee Jones

backlight: sky81452-backlight: Check return value of devm_gpiod_get_optional() in sky81452_bl_parse_dt()

2026-03-06T14:21:07+00:00

The devm_gpiod_get_optional() function may return an ERR_PTR in case of
genuine GPIO acquisition errors, not just NULL which indicates the
legitimate absence of an optional GPIO.

Add an IS_ERR() check after the call in sky81452_bl_parse_dt(). On
error, return the error code to ensure proper failure handling rather
than proceeding with invalid pointers.

Fixes: e1915eec54a6 ("backlight: sky81452: Convert to GPIO descriptors")
Signed-off-by: Chen Ni 
Reviewed-by: Linus Walleij 
Reviewed-by: Daniel Thompson (RISCstar) 
Link: https://patch.msgid.link/20260203021625.578678-1-nichen@iscas.ac.cn
Signed-off-by: Lee Jones

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using

    git grep -l '\