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[v2,00/17] backlight: Introduce power-state constants

Message ID 20240624152033.25016-1-tzimmermann@suse.de
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Series backlight: Introduce power-state constants | expand

Message

Thomas Zimmermann June 24, 2024, 3:19 p.m. UTC 
The backlight code currently uses fbdev's FB_BLANK_ constants to
represent power states UNBLANK and POWERDOWN. Introduce dedicated
backlight constants to remove this dependency on fbdev.

Patch 1 introduces BACKLIGHT_POWER_ON and BACKLIGHT_POWER_OFF, which
replace constants from fbdev. There's also BACKLIGHT_POWER_REDUCED,
which is required by a few drivers that appear to use incorrect or
uncommon blanking semantics.

The rest of the patchset converts backlight drivers. The new
constants' values are identical to the old ones, so the driver
conversion can be done one-by-one.

There are many more backlight drivers in other subsystems. These
can later be converted when the new constants have been merged.
Once merged, several include statements for <linux/fb.h> can be
removed (specifically under drivers/platform/x86/).

This patchset is part of a larger effort to implement the backlight
code without depending on fbdev and ultimatively remove fbdev
dependencies from the kernel.

v2:
- rename BL_CORE_ power constants to BACKLIGHT_POWER_ (Sam)
- fix documentation

Thomas Zimmermann (17):
  backlight: Add BACKLIGHT_POWER_ constants for power states
  backlight: aat2870-backlight: Use blacklight power constants
  backlight: ams369fb06: Use backlight power constants
  backlight: corgi-lcd: Use backlight power constants
  backlight: gpio-backlight: Use backlight power constants
  backlight: ipaq-micro-backlight: Use backlight power constants
  backlight: journada_bl: Use backlight power constants
  backlight: kb3886-bl: Use backlight power constants
  backlight: ktd253-backlight: Use backlight power constants
  backlight: led-backlight: Use backlight power constants
  backlight: lm3533-backlight: Use backlight power constants
  backlight: mp3309c: Use backlight power constants
  backlight: pandora-backlight: Use backlight power constants
  backlight: pcf50633-backlight: Use backlight power constants
  backlight: pwm-backlight: Use backlight power constants
  backlight: rave-sp-backlight: Use backlight power constants
  backlight: sky81452-backlight: Use backlight power constants

 .../ABI/stable/sysfs-class-backlight          |  7 +++---
 drivers/video/backlight/aat2870_bl.c          |  4 ++--
 drivers/video/backlight/ams369fg06.c          | 23 +++++++++----------
 drivers/video/backlight/corgi_lcd.c           |  4 ++--
 drivers/video/backlight/gpio_backlight.c      |  9 ++++----
 drivers/video/backlight/ipaq_micro_bl.c       |  3 +--
 drivers/video/backlight/jornada720_bl.c       |  3 +--
 drivers/video/backlight/kb3886_bl.c           |  4 ++--
 drivers/video/backlight/ktd253-backlight.c    |  5 ++--
 drivers/video/backlight/led_bl.c              |  4 ++--
 drivers/video/backlight/lm3533_bl.c           |  3 +--
 drivers/video/backlight/mp3309c.c             |  4 ++--
 drivers/video/backlight/pandora_bl.c          |  3 +--
 drivers/video/backlight/pcf50633-backlight.c  |  5 ++--
 drivers/video/backlight/pwm_bl.c              |  4 ++--
 drivers/video/backlight/rave-sp-backlight.c   |  2 +-
 drivers/video/backlight/sky81452-backlight.c  |  2 +-
 include/linux/backlight.h                     | 20 +++++++++-------
 18 files changed, 53 insertions(+), 56 deletions(-)