[Bug 85977] [BYT] Backlight support for Dell Venue 8 Pro

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat Aug 15 06:25:38 PDT 2015


https://bugs.freedesktop.org/show_bug.cgi?id=85977

--- Comment #32 from Jan-Michael Brummer <jan.brummer at tabos.org> ---
@Shobhit: I've tested your patches on Dell Venue 8 Pro but it is not working.
Log shows:

[    4.369291] [drm:intel_dsi_init [i915]] *ERROR* Failed to own gpio for panel
control
[    4.369889] [drm:pwm_setup_backlight [i915]] *ERROR* Failed to own the pwm
chip

This is caused by the soc pmic driver loaded *after* i915, and that's why the
pwm list is empty when requesting it. I've added it directly to the kernel and
tested i915 as build-in and module, but it doesn't change the effect. Do you
have a helping hand?

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