On 3/25/19 9:54 AM, Tony Lindgren wrote: > * 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? Yes it should still work the same. I did not change the node name. So the DRM driver should find the node. Dan > > Regards, > > Tony > > > [0] https://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap.git/log/?h=droid4-pending-v5.0 > -- ------------------ Dan Murphy
