drm/i915/vlv: add pll assertion when disabling DPIO common well

When doing this, all PLLs should be disabled.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index cca93d06894c4593012a0072f7f3096df35a26bc..b86edac51be2285719b49deaee11421d77e3b344 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5711,9 +5711,11 @@ static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv,
 void __vlv_set_power_well(struct drm_i915_private *dev_priv,
                          enum punit_power_well power_well_id, bool enable)
 {
+       struct drm_device *dev = dev_priv->dev;
        u32 mask;
        u32 state;
        u32 ctrl;
+       enum pipe pipe;
 
        if (power_well_id == PUNIT_POWER_WELL_DPIO_CMN_BC) {
                if (enable) {
@@ -5727,6 +5729,8 @@ void __vlv_set_power_well(struct drm_i915_private *dev_priv,
                                   DPLL_INTEGRATED_CRI_CLK_VLV);
                        udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
                } else {
+                       for_each_pipe(pipe)
+                               assert_pll_disabled(dev_priv, pipe);
                        /* Assert common reset */
                        I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) &
                                   ~DPIO_CMNRST);