diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 142d1fa497a7..ee6b36e49597 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1206,7 +1206,8 @@ static void intel_disable_pch_pll(struct drm_i915_private *dev_priv, enum pipe pipe) { int reg; - u32 val; + u32 val, pll_mask = TRANSC_DPLL_ENABLE | TRANSC_DPLLB_SEL, + pll_sel = TRANSC_DPLL_ENABLE; if (pipe > 1) return; @@ -1217,6 +1218,15 @@ static void intel_disable_pch_pll(struct drm_i915_private *dev_priv, /* Make sure transcoder isn't still depending on us */ assert_transcoder_disabled(dev_priv, pipe); + if (pipe == 0) + pll_sel |= TRANSC_DPLLA_SEL; + else if (pipe == 1) + pll_sel |= TRANSC_DPLLB_SEL; + + + if ((I915_READ(PCH_DPLL_SEL) & pll_mask) == pll_sel) + return; + reg = PCH_DPLL(pipe); val = I915_READ(reg); val &= ~DPLL_VCO_ENABLE; |