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Revert "drm/i915: allow PCH PWM override on IVB" 

This reverts commit f82cfb6bcd.

This breaks the backlight controls on my IVB asus zenbook with an eDP
panel.

I guess the right fix would be to read this bit and use either the pch
or the cpu register to frob the backlight values. But that is stuff
for -next.

Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-06-27 16:43:36 +02:00
parent 6db65cbb94
commit 7aa1e7f06d
1 changed files with 0 additions and 16 deletions
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16
drivers/gpu/drm/i915/intel_display.c
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@ -6921,19 +6921,6 @@ static void i915_disable_vga(struct drm_device *dev)
POSTING_READ(vga_reg);
}
static void ivb_pch_pwm_override(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
/*
* IVB has CPU eDP backlight regs too, set things up to let the
* PCH regs control the backlight
*/
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));
}
void intel_modeset_init_hw(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@ -6950,9 +6937,6 @@ void intel_modeset_init_hw(struct drm_device *dev)
gen6_enable_rps(dev_priv);
gen6_update_ring_freq(dev_priv);
}
if (IS_IVYBRIDGE(dev))
ivb_pch_pwm_override(dev);
}
void intel_modeset_init(struct drm_device *dev)