[Bug 85977] [BYT DSI PMIC backlight] Backlight support for Dell Venue 8 Pro
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Tue Apr 19 18:07:14 UTC 2016
https://bugs.freedesktop.org/show_bug.cgi?id=85977
Jani Nikula <jani.nikula at intel.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[BYT] Backlight support for |[BYT DSI PMIC backlight]
|Dell Venue 8 Pro |Backlight support for Dell
| |Venue 8 Pro
Resolution|--- |FIXED
Status|NEEDINFO |RESOLVED
--- Comment #38 from Jani Nikula <jani.nikula at intel.com> ---
This bug is about PMIC backlight control. The code to support this, both on BYT
and CHV, has been upstream for a while now, so I'm closing the bug. Thanks for
the report.
There still remains the issue with probe ordering: if i915 gets probed before
all the related pmic/i2c drivers, pwm_get() fails as described in comment #32.
If you want to file a new bug for that, I don't mind.
As a workaround, these config options worked for me on Surface 3 PMIC
backlight:
CONFIG_PWM=y
CONFIG_PWM_CRC=y
CONFIG_I2C_DESIGNWARE_PLATFORM=y
CONFIG_I2C_DESIGNWARE_PCI=y
CONFIG_INTEL_SOC_PMIC=y
CONFIG_DRM_I915=m
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