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

Just assume that it will turn off...

Reported-by: Sitsofe Wheeler <sitsofe@yahoo.com>
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 93a711d9dcf582881c26d6e24160b05979270063..f533169e5d8b636cf129a5325afb37a03f71a3f6 100644 (file)
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -83,10 +83,7 @@ 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);
-               POSTING_READ(lvds_reg);
-
-               I915_WRITE(ctl_reg, I915_READ(ctl_reg) |
-                          POWER_TARGET_ON);
+               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");
 
@@ -94,11 +91,7 @@ static void intel_lvds_set_power(struct drm_device *dev, bool on)
        } else {
                intel_panel_set_backlight(dev, 0);
 
-               I915_WRITE(ctl_reg, I915_READ(ctl_reg) &
-                          ~POWER_TARGET_ON);
-               if (wait_for((I915_READ(status_reg) & PP_ON) == 0, 1000))
-                       DRM_ERROR("timed out waiting for LVDS pipe to turn off");
-
+               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);
        }