[15/87] drm/i915: Fix calculation of backlight value in combined mode

[Greg KH]

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

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

From: Takashi Iwai <tiwai@xxxxxxx>

commit ba3820ade317ee36e496b9b40d2ec3987dd4aef0 upstream.

[The upstream commit above is a combination of revert + one-liner fix.
 This patch contains only the latter that is needed for 2.6.37.x.]

This patch fixes the backlight level calculation for combination mode
used in some models like GM45.  It's due to a wrong bit shift
introduced by the commit a95735569312f2ab0c80425e2cd1e5cb0b4e1870
    drm/i915: Refactor panel backlight controls

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=23472
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=34524
Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=672946

Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
 drivers/gpu/drm/i915/intel_panel.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -176,7 +176,6 @@ u32 intel_panel_get_backlight(struct drm
 			val &= ~1;
 			pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc);
 			val *= lbpc;
-			val >>= 1;
 		}
 	}
 


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