From d752048dcd1225b481074318cf92ee751d6d475e Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Wed, 9 Apr 2014 13:28:59 +0300 Subject: [PATCH] drm/i915/chv: Turn off dclkp after the PLL has been disabled MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit During the enable sequence we first enable the dclkp output to the display controller, and then enable the PLL. Do the opposite during the disable sequence. Signed-off-by: Ville Syrjälä Reviewed-by: Mika Kuoppala Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 39f37bb7a16a..21103a547aa7 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1694,6 +1694,7 @@ static void vlv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe) static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe) { + enum dpio_channel port = vlv_pipe_to_channel(pipe); u32 val; /* Make sure the pipe isn't still relying on us */ @@ -1705,6 +1706,15 @@ static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe) val |= DPLL_INTEGRATED_CRI_CLK_VLV; I915_WRITE(DPLL(pipe), val); POSTING_READ(DPLL(pipe)); + + mutex_lock(&dev_priv->dpio_lock); + + /* Disable 10bit clock to display controller */ + val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port)); + val &= ~DPIO_DCLKP_EN; + vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), val); + + mutex_unlock(&dev_priv->dpio_lock); } void vlv_wait_port_ready(struct drm_i915_private *dev_priv, @@ -5538,11 +5548,6 @@ static void chv_update_pll(struct intel_crtc *crtc) val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET); vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port), val); - /* Disable 10bit clock to display controller */ - val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port)); - val &= ~DPIO_DCLKP_EN; - vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), val); - /* p1 and p2 divider */ vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW13(port), 5 << DPIO_CHV_S1_DIV_SHIFT | -- 2.20.1