Messages in this thread Patch in this message | | | Date | Mon, 21 Mar 2011 16:06:14 -0700 | From | Greg KH <> | Subject | [15/87] drm/i915: Fix calculation of backlight value in combined mode |
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2.6.37-stable review patch. If anyone has any objections, please let us know.
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From: Takashi Iwai <tiwai@suse.de>
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@suse.de> --- 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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