3.11-stable review patch.  If anyone has any objections, please let me know.

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

From: Alex Deucher <alexander.deuc...@amd.com>

commit f75195cac32bfd2ef07764bd370d3b788bd8b003 upstream.

The LCD has a relatively short vblank time (216us), but
the card is able to reclock memory fine in that time.

Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Reported-by: normalr...@gmail.com
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/gpu/drm/radeon/rv770_dpm.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/radeon/rv770_dpm.c
+++ b/drivers/gpu/drm/radeon/rv770_dpm.c
@@ -2517,8 +2517,16 @@ u32 rv770_dpm_get_mclk(struct radeon_dev
 bool rv770_dpm_vblank_too_short(struct radeon_device *rdev)
 {
        u32 vblank_time = r600_dpm_get_vblank_time(rdev);
+       u32 switch_limit = 300;
 
-       if (vblank_time < 300)
+       /* quirks */
+       /* ASUS K70AF */
+       if ((rdev->pdev->device == 0x9553) &&
+           (rdev->pdev->subsystem_vendor == 0x1043) &&
+           (rdev->pdev->subsystem_device == 0x1c42))
+               switch_limit = 200;
+
+       if (vblank_time < switch_limit)
                return true;
        else
                return false;


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