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>
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index f533169..9089604 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -84,17 +84,13 @@
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)