diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2015-05-26 20:22:40 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-06-15 13:25:47 +0300 |
| commit | fcc0008fd02330f1c539a8dd831b00ca9b998cd8 (patch) | |
| tree | d58b8d0eadfe02ba825655b479e321f0c4a8df6d | |
| parent | ac3f918d5a069f1c34c6e0d39cccb0e9c8ac9334 (diff) | |
| download | linux-fcc0008fd02330f1c539a8dd831b00ca9b998cd8.tar.xz | |
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>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index c4ccc376ae44..193ba79e5a41 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6055,7 +6055,7 @@ static void vlv_program_pfi_credits(struct drm_i915_private *dev_priv) if (DIV_ROUND_CLOSEST(dev_priv->cdclk_freq, 1000) >= dev_priv->rps.cz_freq) { /* CHV suggested value is 31 or 63 */ if (IS_CHERRYVIEW(dev_priv)) - credits = PFI_CREDIT_31; + credits = PFI_CREDIT_63; else credits = PFI_CREDIT(15); } else { |