On Thu, Mar 13, 2025 at 04:51:51PM +0000, Lee Jones wrote: > On Thu, 06 Mar 2025, Thomas Zimmermann wrote: > > > This series removes the remaining 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 and 8 remove fbdev event handling from lcd code and patches 9 and 10 > > 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 test this > > series. > > > > v3: > > - export several symbols > > - static-inline declare empty placeholders > > v2: > > - avoid IS_REACHABLE() in source file (Lee) > > - simplify several interfaces and helpers > > - use lock guards > > - initialize global lists and mutices > > > > Thomas Zimmermann (11): > > 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: Move event handling into helpers > > backlight: lcd: Replace fb events with a dedicated function call > > 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 | 48 +++++----- > > drivers/video/backlight/backlight.c | 93 +++++-------------- > > drivers/video/backlight/lcd.c | 108 +++++++++-------------- > > drivers/video/fbdev/core/fb_backlight.c | 12 +++ > > drivers/video/fbdev/core/fb_info.c | 1 + > > drivers/video/fbdev/core/fbmem.c | 82 ++++++++++++++--- > > drivers/video/fbdev/core/fbsysfs.c | 8 +- > > include/linux/backlight.h | 22 ++--- > > include/linux/fb.h | 12 +-- > > include/linux/lcd.h | 21 ++++- > > include/linux/leds.h | 6 ++ > > 11 files changed, 205 insertions(+), 208 deletions(-) > > No immediately obvious issues from the LEDs side. > > Still needs reviews from Backlight and fbdev. I looked throught the series and it's a small step, but I think it's the right direction for where we want backlight/fbdev/drm-kms to head towards long-term. So on the series: Acked-by: Simona Vetter <simona.vetter@xxxxxxxx> Cheers, Sima > > -- > Lee Jones [李琼斯] -- Simona Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
