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drm/i915/lvds: Remove busy wait for powering up the panel. 

We just assume that it will happen in a timely manner. A variant of this
patch was first written and tested by Arjan van de Van.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-09-12 13:07:25 +01:00
parent 77d07fd9d7
commit c9f9ccc150
1 changed files with 1 additions and 5 deletions
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6
drivers/gpu/drm/i915/intel_lvds.c
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@ -84,17 +84,13 @@ static void intel_lvds_set_power(struct drm_device *dev, bool on)
if (on) {
I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
if (wait_for(I915_READ(status_reg) & PP_ON, 1000))
DRM_ERROR("timed out waiting to enable LVDS pipe");
intel_panel_set_backlight(dev, dev_priv->backlight_level);
} else {
intel_panel_set_backlight(dev, 0);
I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
POSTING_READ(lvds_reg);
}
POSTING_READ(lvds_reg);
}
static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)