* Dan Murphy <dmurphy@xxxxxx> [190325 12:36]: > On 3/22/19 5:16 PM, Tony Lindgren wrote: > > I can control the backlight brightness just fine via /sys, and > > backlight shows up as the trigger in /sys/class/leds/lm3532:backlight, > > but /sys/class/backlight is empty and looks like drm can't find it. > > > > Do I need to enable some additional driver(s) to get this to work > > with the drm driver? > > > > Can you dump or point to the defconfig? This is just with the omap2plus_defconfig as in the droid4-pending-v5.0 test branch below [0]. That branch has Sebastian's drm patches. The branch also has the older ti-lmu patches that I reverted for testing before applying your new series and enabling it in .config. The drm driver (drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c) just does: backlight = of_parse_phandle(node, "backlight", 0); ... That should still work the same, right? Regards, Tony [0] https://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap.git/log/?h=droid4-pending-v5.0
