diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 0c693d8b3a2c826fcb32d2e799f865b08116c078..e7e95c3cf6adf178febdb0619608ef3070efd81c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1712,6 +1712,17 @@ static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe) val &= ~DPIO_DCLKP_EN; vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), val); + /* disable left/right clock distribution */ + if (pipe != PIPE_B) { + val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0); + val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK); + vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val); + } else { + val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1); + val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK); + vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val); + } + mutex_unlock(&dev_priv->dpio_lock); }