[Intel-gfx] [PATCH] drm/i915/bxt: Reversed polarity of PORT_PLL_REF_SEL bit

[Dongwon Kim]

For BXT, Polarity of PORT_PLL_REF_SEL is reversed in
its description in Bspec. This bit should be set for
"Non-SSC".

Signed-off-by: Dongwon Kim <dongwon.kim at intel.com>
---
 drivers/gpu/drm/i915/intel_dpll_mgr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c
index 4b636c4..d55b308 100644
--- a/drivers/gpu/drm/i915/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c
@@ -1285,7 +1285,7 @@ static void bxt_ddi_pll_enable(struct drm_i915_private *dev_priv,
 	enum port port = (enum port)pll->id;	/* 1:1 port->PLL mapping */
 
 	temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
-	temp &= ~PORT_PLL_REF_SEL;
+	temp |= PORT_PLL_REF_SEL;
 	/* Non-SSC reference */
 	I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
 
-- 
1.9.1