This needs to be done before we power back on the CMN_BC well so the PHY
can calibrate properly.
Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org>
---
drivers/gpu/drm/i915/intel_display.c | 8 --------
drivers/gpu/drm/i915/intel_pm.c | 11 +++++++++++
2 files changed, 11 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index bdb4624..369cd1e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1477,14 +1477,6 @@ static void intel_reset_dpio(struct drm_device *dev)
if (!IS_VALLEYVIEW(dev))
return;
- /*
- * Enable the CRI clock source so we can get at the display and the
- * reference clock for VGA hotplug / manual detection.
- */
- I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) |
- DPLL_REFA_CLK_ENABLE_VLV |
- DPLL_INTEGRATED_CRI_CLK_VLV);
-
if (IS_CHERRYVIEW(dev)) {
enum dpio_phy phy;
u32 val;
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 8f7dbb9..e8f0c85 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5731,6 +5731,17 @@ void __vlv_set_power_well(struct drm_i915_private
*dev_priv,
u32 state;
u32 ctrl;
+ if (power_well_id == PUNIT_POWER_WELL_DPIO_CMN_BC && enable) {
+ /*
+ * Enable the CRI clock source so we can get at the display
+ * and the reference clock for VGA hotplug / manual detection.
+ */
+ I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) |
+ DPLL_REFA_CLK_ENABLE_VLV |
+ DPLL_INTEGRATED_CRI_CLK_VLV);
+ udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
+ }
+
mask = PUNIT_PWRGT_MASK(power_well_id);
state = enable ? PUNIT_PWRGT_PWR_ON(power_well_id) :
PUNIT_PWRGT_PWR_GATE(power_well_id);
--
1.8.4.2
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