[Intel-gfx] [PATCH 2/6] drm/i915/crt: explicitly set up HOTPLUG_BITS on resume

[Daniel Vetter]

... instead of relying on the register save/restore madness to do this.

To extract a bit of code call drm_mode_config_reset both on resume
and boot-up and move the hw state frobbing from the crt_init to the
->reset callback. The crt connector is the only one with a ->reset
callback, hence we can easily do this.

Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/i915_drv.c      |  1 -
 drivers/gpu/drm/i915/intel_crt.c     | 26 +++++++++++++-------------
 drivers/gpu/drm/i915/intel_display.c |  2 ++
 3 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index a7837e5..2aabce7 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -547,7 +547,6 @@ static int i915_drm_thaw(struct drm_device *dev)
 
 		intel_modeset_init_hw(dev);
 		intel_modeset_setup_hw_state(dev);
-		drm_mode_config_reset(dev);
 		drm_irq_install(dev);
 	}
 
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 46c90f5..53f3e87 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -662,10 +662,22 @@ static int intel_crt_set_property(struct drm_connector *connector,
 static void intel_crt_reset(struct drm_connector *connector)
 {
 	struct drm_device *dev = connector->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crt *crt = intel_attached_crt(connector);
 
-	if (HAS_PCH_SPLIT(dev))
+	if (HAS_PCH_SPLIT(dev)) {
+		u32 adpa;
+
+		adpa = I915_READ(PCH_ADPA);
+		adpa &= ~ADPA_CRT_HOTPLUG_MASK;
+		adpa |= ADPA_HOTPLUG_BITS;
+		I915_WRITE(PCH_ADPA, adpa);
+		POSTING_READ(PCH_ADPA);
+
+		DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa);
 		crt->force_hotplug_required = 1;
+	}
+
 }
 
 /*
@@ -784,18 +796,6 @@ void intel_crt_init(struct drm_device *dev)
 	 * Configure the automatic hotplug detection stuff
 	 */
 	crt->force_hotplug_required = 0;
-	if (HAS_PCH_SPLIT(dev)) {
-		u32 adpa;
-
-		adpa = I915_READ(PCH_ADPA);
-		adpa &= ~ADPA_CRT_HOTPLUG_MASK;
-		adpa |= ADPA_HOTPLUG_BITS;
-		I915_WRITE(PCH_ADPA, adpa);
-		POSTING_READ(PCH_ADPA);
-
-		DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa);
-		crt->force_hotplug_required = 1;
-	}
 
 	dev_priv->hotplug_supported_mask |= CRT_HOTPLUG_INT_STATUS;
 }
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index d469b42..ffc3758 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8334,6 +8334,8 @@ void intel_modeset_setup_hw_state(struct drm_device *dev)
 	intel_modeset_update_staged_output_state(dev);
 
 	intel_modeset_check_state(dev);
+
+	drm_mode_config_reset(dev);
 }
 
 void intel_modeset_gem_init(struct drm_device *dev)
-- 
1.7.11.2