drm/i915: Add support for dual-channel LVDS on 8xx.

This corresponds to a fix to UMS back in 2007.  Fixes fd.o bug #20115.

Signed-off-by: Ma Ling <ling.ma@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 1da7b0b..d6fce21 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -90,7 +90,7 @@ struct intel_limit {
 #define I8XX_P2_SLOW                 4
 #define I8XX_P2_FAST                 2
 #define I8XX_P2_LVDS_SLOW            14
-#define I8XX_P2_LVDS_FAST            14 /* No fast option */
+#define I8XX_P2_LVDS_FAST            7
 #define I8XX_P2_SLOW_LIMIT      165000
 
 #define I9XX_DOT_MIN             20000