linux-stable.git/drivers/video/backlight, branch v5.8

video: backlight: tosa_lcd: convert to use i2c_new_client_device()

2020-06-19T07:20:25+00:00

Move away from the deprecated API and return the shiny new ERRPTR where
useful.

Signed-off-by: Wolfram Sang 
Reviewed-by: Daniel Thompson 
Acked-by: Lee Jones 
Signed-off-by: Wolfram Sang

backlight: Add backlight_device_get_by_name()

2020-05-11T06:39:16+00:00

Add a way to lookup a backlight device based on its name.
Will be used by a USB display gadget getting the name from configfs.

Signed-off-by: Noralf Trønnes 
Reviewed-by: Sam Ravnborg 
Reviewed-by: Daniel Thompson 
Acked-by: Jingoo Han 
Signed-off-by: Lee Jones

backlight: qcom-wled: Add support for WLED5 peripheral that is present on PM8150L PMICs

2020-05-06T10:01:36+00:00

PM8150L WLED supports the following:
    - Two modulators and each sink can use any of the modulator
    - Multiple CABC selection options from which one can be selected/enabled
    - Multiple brightness width selection (12 bits to 15 bits)

Signed-off-by: Subbaraman Narayanamurthy 
Signed-off-by: Kiran Gunda 
Reviewed-by: Daniel Thompson 
Signed-off-by: Lee Jones

backlight: qcom-wled: Add callback functions

2020-05-06T09:25:10+00:00

Add wled_cabc_config, wled_sync_toggle, wled_ovp_fault_status
and wled_ovp_delay and wled_auto_detection_required callback
functions to prepare the driver for adding WLED5 support.

Signed-off-by: Kiran Gunda 
Signed-off-by: Subbaraman Narayanamurthy 
Reviewed-by: Daniel Thompson 
Signed-off-by: Lee Jones

backlight: l4f00242t03: Convert to GPIO descriptors

2020-04-29T07:52:15+00:00

This converts the l4f00242t03 backlight driver to use GPIO
descriptors and switches the two Freescale i.MX boards over
to passing descriptors instead of global GPIO numbers.

We use the typical names "enable" and "reset" as found in
the device tree bindings for panel GPIOs.

This saves a lot of code in the driver and makes it possible
to get rid of the platform data header altogether.

Signed-off-by: Linus Walleij 
Reviewed-by: Daniel Thompson 
Acked-by: Shawn Guo 
Signed-off-by: Lee Jones

backlight: lp855x: Ensure regulators are disabled on probe failure

2020-04-28T07:09:36+00:00

If probing the LP885x backlight fails after the regulators have been
enabled, then the following warning is seen when releasing the
regulators ...

 WARNING: CPU: 1 PID: 289 at drivers/regulator/core.c:2051 _regulator_put.part.28+0x158/0x160
 Modules linked in: tegra_xudc lp855x_bl(+) host1x pwm_tegra ip_tables x_tables ipv6 nf_defrag_ipv6
 CPU: 1 PID: 289 Comm: systemd-udevd Not tainted 5.6.0-rc2-next-20200224 #1
 Hardware name: NVIDIA Jetson TX1 Developer Kit (DT)

 ...

 Call trace:
  _regulator_put.part.28+0x158/0x160
  regulator_put+0x34/0x50
  devm_regulator_release+0x10/0x18
  release_nodes+0x12c/0x230
  devres_release_all+0x34/0x50
  really_probe+0x1c0/0x370
  driver_probe_device+0x58/0x100
  device_driver_attach+0x6c/0x78
  __driver_attach+0xb0/0xf0
  bus_for_each_dev+0x68/0xc8
  driver_attach+0x20/0x28
  bus_add_driver+0x160/0x1f0
  driver_register+0x60/0x110
  i2c_register_driver+0x40/0x80
  lp855x_driver_init+0x20/0x1000 [lp855x_bl]
  do_one_initcall+0x58/0x1a0
  do_init_module+0x54/0x1d0
  load_module+0x1d80/0x21c8
  __do_sys_finit_module+0xe8/0x100
  __arm64_sys_finit_module+0x18/0x20
  el0_svc_common.constprop.3+0xb0/0x168
  do_el0_svc+0x20/0x98
  el0_sync_handler+0xf4/0x1b0
  el0_sync+0x140/0x180

Fix this by ensuring that the regulators are disabled, if enabled, on
probe failure.

Finally, ensure that the vddio regulator is disabled in the driver
remove handler.

Signed-off-by: Jon Hunter 
Reviewed-by: Daniel Thompson 
Signed-off-by: Lee Jones

Merge tag 'backlight-next-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight

2020-04-08T02:44:52+00:00

Pull backlight updates from Lee Jones:
 "Switch pwm_bl and corgi_lcd drivers to use GPIO descriptors"

* tag 'backlight-next-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
  backlight: corgi: Convert to use GPIO descriptors
  backlight: pwm_bl: Switch to full GPIO descriptor

backlight: corgi: Convert to use GPIO descriptors

2020-03-25T09:30:46+00:00

The code in the Corgi backlight driver can be considerably
simplified by moving to GPIO descriptors and lookup tables
from the board files instead of passing GPIO numbers using
the old API.

Make sure to encode inversion semantics for the Akita and
Spitz platforms inside the GPIO lookup table and drop the
custom inversion semantics from the driver.

All in-tree users are converted in this patch.

Signed-off-by: Linus Walleij 
Acked-by: Robert Jarzmik 
Reviewed-by: Daniel Thompson 
Signed-off-by: Lee Jones

backlight: pwm_bl: Switch to full GPIO descriptor

2020-03-18T15:05:57+00:00

The PWM backlight still supports passing a enable GPIO line as
platform data using the legacy  API.

It turns out that ever board using this mechanism except one
is pass .enable_gpio = -1. So we drop all these cargo-culted -1's
from all instances of this platform data in the kernel.

The remaning board, Palm TC, is converted to pass a machine
descriptior table with the "enable" GPIO instead, and delete the
platform data entry for enable_gpio and the code handling it
and things should work smoothly with the new API.

Signed-off-by: Linus Walleij 
Acked-by: Robert Jarzmik 
Acked-by: Krzysztof Kozlowski 
Reviewed-by: Daniel Thompson 
Signed-off-by: Lee Jones

Merge v5.6-rc5 into drm-next

2020-03-10T21:27:21+00:00

Requested my mripard for some misc patches that need this as a base.

Signed-off-by: Dave Airlie