drm/i915/dvo: implement get_hw_state

Similar to the sdvo code we poke the dvo encoder whether the output is
active. Safe that dvo encoders are not standardized, so this requires
a new callback into the dvo chip driver.

Hence implement that for all 6 dvo drivers.

v2: With the newly added ns2501 we now have 6 dvo drivers instead of
just 5 ...

Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index 84c0867e212b..e9397b72b4f3 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -105,6 +105,31 @@ static struct intel_dvo *intel_attached_dvo(struct drm_connector *connector)
                             struct intel_dvo, base);
 }
 
+static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector)
+{
+        struct intel_dvo *intel_dvo = intel_attached_dvo(&connector->base);
+
+        return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev);
+}
+
+static bool intel_dvo_get_hw_state(struct intel_encoder *encoder,
+                                   enum pipe *pipe)
+{
+        struct drm_device *dev = encoder->base.dev;
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        struct intel_dvo *intel_dvo = enc_to_intel_dvo(&encoder->base);
+        u32 tmp;
+
+        tmp = I915_READ(intel_dvo->dev.dvo_reg);
+
+        if (!(tmp & DVO_ENABLE))
+                return false;
+
+        *pipe = PORT_TO_PIPE(tmp);
+
+        return true;
+}
+
 static void intel_disable_dvo(struct intel_encoder *encoder)
 {
         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
@@ -414,6 +439,8 @@ void intel_dvo_init(struct drm_device *dev)
 
         intel_encoder->disable = intel_disable_dvo;
         intel_encoder->enable = intel_enable_dvo;
+        intel_encoder->get_hw_state = intel_dvo_get_hw_state;
+        intel_connector->get_hw_state = intel_dvo_connector_get_hw_state;
 
         /* Now, try to find a controller */
         for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {