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

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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>
This commit is contained in:
Ville Syrjälä 2016-03-15 16:39:59 +02:00
parent 7d1a83cb68
commit 5593946921
1 changed files with 0 additions and 11 deletions
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11
drivers/gpu/drm/i915/intel_display.c
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@ -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,