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drm/i915: Bump CHV PFI credits to 63 when cdclk>=czclk
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Tue, 26 May 2015 17:22:40 +0000 (20:22 +0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Mon, 15 Jun 2015 10:25:47 +0000 (12:25 +0200)
commitfcc0008fd02330f1c539a8dd831b00ca9b998cd8
treed58b8d0eadfe02ba825655b479e321f0c4a8df6dtree | snapshot
parentac3f918d5a069f1c34c6e0d39cccb0e9c8ac9334commit | diff
drm/i915: Bump CHV PFI credits to 63 when cdclk>=czclk

Switch from using 31 PFI credits to 63 PFI credits when cdclk>=czclk on
CHV. The spec lists both 31 and 63 as "suggested" values, but based on
feedback from hardware folks we should actually be using 63. Originally
I picked the 31 basically by flipping a coin.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Clint Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_display.c diff | blob | history
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