From: Indan Zupancic <indan@nul.nu>
Date: Wed, 12 Jan 2011 11:59:19 +0000 (+0000)
Subject: drm/i915/panel: The backlight is enabled if the current value is non-zero
X-Git-Tag: firefly_0821_release~7613^2~2700^2~7
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c8303e7f3f3093c16ef0fa5f73280637c89d4368;p=firefly-linux-kernel-4.4.55.git

drm/i915/panel: The backlight is enabled if the current value is non-zero

... and not if the maximum is non-zero. This fixes the typo introduced
in 47356eb6728501452 and preserves the backlight value from boot.

[ickle: My thanks also to Indan Zupancic for diagnosing the original
        regression and suggesting the appropriate fix.]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org # after 47356eb6728501452
---

diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index e00d200df3db..c65992df458d 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -278,6 +278,6 @@ void intel_panel_setup_backlight(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	dev_priv->backlight_level = intel_panel_get_max_backlight(dev);
+	dev_priv->backlight_level = intel_panel_get_backlight(dev);
 	dev_priv->backlight_enabled = dev_priv->backlight_level != 0;
 }