drm/i915/cnl: document WaVFUnitClockGatingDisable

No functional change. WA is already properly applied.
but in different databases it has different names.
Let's document all of them to avoid future confusion.

Cc: Rafael Antognolli <rafael.antognolli@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180306012000.18928-1-rodrigo.vivi@intel.com

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 3e60279..1ed1abb 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -8523,6 +8523,7 @@ static void cnl_init_clock_gating(struct drm_i915_private *dev_priv)
        I915_WRITE(SLICE_UNIT_LEVEL_CLKGATE, val);
 
        /* WaDisableVFclkgate:cnl */
+       /* WaVFUnitClockGatingDisable:cnl */
        val = I915_READ(UNSLICE_UNIT_LEVEL_CLKGATE);
        val |= VFUNIT_CLKGATE_DIS;
        I915_WRITE(UNSLICE_UNIT_LEVEL_CLKGATE, val);