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Commit 55939469 authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

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: default avatarVille 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: default avatarJani Nikula <jani.nikula@intel.com>
parent 7d1a83cb

drivers/gpu/drm/i915/intel_display.c

+0 −11
Original line number Diff line number Diff line
@@ -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,