On Fri, 05 Feb 2021 17:36:44 +0100, Alex Deucher wrote: > > On Wed, Feb 3, 2021 at 7:42 AM Takashi Iwai <tiwai@xxxxxxx> wrote: > > > > The current code tries to read the brightness value via > > dc_link_get_backlight_level() no matter whether it's controlled via > > aux or not, and this results in a bogus value returned. > > Fix it to read the current value via > > dc_link_get_backlight_level_nits() for the aux. > > > > BugLink: https://bugzilla.opensuse.org/show_bug.cgi?id=1180749 > > BugLink: https://gitlab.freedesktop.org/drm/amd/-/issues/1438 > > Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> > > This looks fine to me. FWIW, I have a similar patch set here: > https://cgit.freedesktop.org/~agd5f/linux/log/?h=backlight_wip I'm fine to scratch mine as long as the issue gets fixed :) FWIW, the biggest problem so far was the aux channel backlight didn't work as expected, the actual backlight isn't changed by the backlight sysfs write. (And the sysfs read gives a bogus value, but it's not the cause of the non-working backlight control.) Does the aux channel backlight really work with the current code? Or is this rather a device-specific issue (e.g. broken BIOS) and we might need to come up with a deny list or such? thanks, Takashi _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
