[24/90] drm/i915: load the LUT before pipe enable on ILK+

[Greg KH]

3.0-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>

commit 9c54c0dd948d715ccfd79e97d852f80eeb53254a upstream.

Per the specs and to address
https://bugs.freedesktop.org/show_bug.cgi?id=36888.

Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Signed-off-by: Keith Packard <keithp@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/gpu/drm/i915/intel_display.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2699,14 +2699,18 @@ static void ironlake_crtc_enable(struct
 		I915_WRITE(PF_WIN_SZ(pipe), dev_priv->pch_pf_size);
 	}
 
+	/*
+	 * On ILK+ LUT must be loaded before the pipe is running but with
+	 * clocks enabled
+	 */
+	intel_crtc_load_lut(crtc);
+
 	intel_enable_pipe(dev_priv, pipe, is_pch_port);
 	intel_enable_plane(dev_priv, plane, pipe);
 
 	if (is_pch_port)
 		ironlake_pch_enable(crtc);
 
-	intel_crtc_load_lut(crtc);
-
 	mutex_lock(&dev->struct_mutex);
 	intel_update_fbc(dev);
 	mutex_unlock(&dev->struct_mutex);


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