[Intel-gfx] [PATCH 3/8] drm/i915/vlv: split DPIO init and reset

[Jesse Barnes]

We only need to init the reg offset for DPIO once, but we need to reset
DPIO at resume time and at init time.

Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
---
 drivers/gpu/drm/i915/intel_display.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a30176b..a2cd692 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1368,6 +1368,15 @@ static void intel_init_dpio(struct drm_device *dev)
 		return;
 
 	DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO;
+}
+
+static void intel_reset_dpio(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	if (!IS_VALLEYVIEW(dev))
+		return;
+
 	/*
 	 * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx -
 	 *  6.	De-assert cmn_reset/side_reset. Same as VLV X0.
@@ -10799,7 +10808,7 @@ void intel_modeset_init_hw(struct drm_device *dev)
 		I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) |
 			   DPLL_INTEGRATED_CRI_CLK_VLV);
 
-	intel_init_dpio(dev);
+	intel_reset_dpio(dev);
 
 	mutex_lock(&dev->struct_mutex);
 	intel_enable_gt_powersave(dev);
@@ -10862,6 +10871,7 @@ void intel_modeset_init(struct drm_device *dev)
 	}
 
 	intel_init_dpio(dev);
+	intel_reset_dpio(dev);
 
 	intel_cpu_pll_init(dev);
 	intel_shared_dpll_init(dev);
-- 
1.8.4.2