Author: adrian
Date: Sat Jan 31 02:13:25 2015
New Revision: 277959
URL: https://svnweb.freebsd.org/changeset/base/277959
Log:
Fix backlight for ivybridge based laptops (and whatever else comes through
this codepath.)
(1<<30) is documented as BLM_PCH_OVERRIDE_ENABLE, which the current
i915 driver in Linux only sets for broadwell chips.
This fixes the backlight control on the Lenovo X230.
Approved by: kib
Obtained from: Linux 7aa1e7f06d6ea1bce3b27630d50769d13da28b1a
Modified:
head/sys/dev/drm2/i915/intel_display.c
Modified: head/sys/dev/drm2/i915/intel_display.c
==============================================================================
--- head/sys/dev/drm2/i915/intel_display.c Sat Jan 31 02:12:57 2015
(r277958)
+++ head/sys/dev/drm2/i915/intel_display.c Sat Jan 31 02:13:25 2015
(r277959)
@@ -6995,7 +6995,7 @@ static void ivb_pch_pwm_override(struct
*/
I915_WRITE(BLC_PWM_CPU_CTL2, PWM_ENABLE);
I915_WRITE(BLC_PWM_CPU_CTL, 0);
- I915_WRITE(BLC_PWM_PCH_CTL1, PWM_ENABLE | (1<<30));
+ I915_WRITE(BLC_PWM_PCH_CTL1, PWM_ENABLE);
}
void intel_modeset_init_hw(struct drm_device *dev)
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