drm/i915: Add encoder->post_pll_disable() hooks and move CHV clock buffer disables there
Move the CHV clock buffer disable from chv_disable_pll() to the new
encoder .post_pll_disable() hook. This is more symmetric since the
clock buffer enable happens from the .pre_pll_enable() hook.
We'll have more use for the new hook soon.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Deepak S <deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index da7d1ae..4e5bd87 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2943,6 +2943,28 @@
mutex_unlock(&dev_priv->sb_lock);
}
+static void chv_dp_post_pll_disable(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ enum pipe pipe = to_intel_crtc(encoder->base.crtc)->pipe;
+ u32 val;
+
+ mutex_lock(&dev_priv->sb_lock);
+
+ /* 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->sb_lock);
+}
+
/*
* Native read with retry for link status and receiver capability reads for
* cases where the sink may still be asleep.
@@ -6000,6 +6022,7 @@
intel_encoder->pre_enable = chv_pre_enable_dp;
intel_encoder->enable = vlv_enable_dp;
intel_encoder->post_disable = chv_post_disable_dp;
+ intel_encoder->post_pll_disable = chv_dp_post_pll_disable;
} else if (IS_VALLEYVIEW(dev)) {
intel_encoder->pre_pll_enable = vlv_dp_pre_pll_enable;
intel_encoder->pre_enable = vlv_pre_enable_dp;