This series removes the last dependencies on fbdev from the backlight,
lcd and led subsystems. Each depends on fbdev events to track display
state. Make fbdev inform each subsystem via a dedicated interface
instead.
Patches 1 to 3 make fbdev track blank state for each display, so
that backlight code doesn't have to.
Patches 4 to 6 remove fbdev event handling from backlight code. Patches
7 to 9 remove fbdev event handling from lcd code and patches 10 to 12
do the same for led's backlight trigger.
The final patch removes the event constants from fbdev.
With the series applied, the three subsystems do no longer depend
on fbdev. It's also a clean up for fbdev. Fbdev used to send out a
large number of events. That mechanism has been deprecated for some
time and converted call to dedicated functions instead.
Testing is very welcome, as I don't have the hardware to really test
this series.
Thomas Zimmermann (13):
fbdev: Rework fb_blank()
fbdev: Track display blanking state
fbdev: Send old blank state in FB_EVENT_BLANK
backlight: Implement fbdev tracking with blank state from event
backlight: Move blank-state handling into helper
backlight: Replace fb events with a dedicated function call
backlight: lcd: Maintain global list of lcd devices
backlight: lcd: Move event handling into helpers
backlight: lcd: Replace fb events with a dedicated function call
leds: backlight trigger: Maintain global list of led backlight
triggers
leds: backlight trigger: Move blank-state handling into helper
leds: backlight trigger: Replace fb events with a dedicated function
call
fbdev: Remove constants of unused events
drivers/leds/trigger/ledtrig-backlight.c | 49 +++++-----
drivers/video/backlight/backlight.c | 93 +++++--------------
drivers/video/backlight/lcd.c | 109 +++++++++--------------
drivers/video/fbdev/core/fb_backlight.c | 12 +++
drivers/video/fbdev/core/fb_info.c | 1 +
drivers/video/fbdev/core/fbmem.c | 88 +++++++++++++++---
drivers/video/fbdev/core/fbsysfs.c | 8 +-
include/linux/backlight.h | 22 ++---
include/linux/fb.h | 12 +--
include/linux/lcd.h | 12 ++-
include/linux/leds.h | 6 ++
11 files changed, 204 insertions(+), 208 deletions(-)
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2.48.1
