drm/i915: Remove the "three times for luck" trick from vlv_enable_pll()

VLV DPLL is somewhat sane and doesn't run on luck.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458052809-23426-7-git-send-email-ville.syrjala@linux.intel.com
Acked-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4fbff48..cf16bdb 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1546,17 +1546,6 @@ static void vlv_enable_pll(struct intel_crtc *crtc,
 
        I915_WRITE(DPLL_MD(pipe), pipe_config->dpll_hw_state.dpll_md);
        POSTING_READ(DPLL_MD(pipe));
-
-       /* We do this three times for luck */
-       I915_WRITE(reg, dpll);
-       POSTING_READ(reg);
-       udelay(150); /* wait for warmup */
-       I915_WRITE(reg, dpll);
-       POSTING_READ(reg);
-       udelay(150); /* wait for warmup */
-       I915_WRITE(reg, dpll);
-       POSTING_READ(reg);
-       udelay(150); /* wait for warmup */
 }
 
 static void chv_enable_pll(struct intel_crtc *crtc,