drm/i915/crt: implement get_hw_state

Note that even though this connector is cloneable we still can use the
exact same test to check whether the connector is on or whether the
encoder is enabled - both the dpms code and the encoder disable/enable
frob the exact same hw state.

For dvo/sdvo outputs, this will be different.

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

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 2e25810..b0fadd0 100644 (file)
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -61,6 +61,27 @@ static struct intel_crt *intel_encoder_to_crt(struct intel_encoder *encoder)
        return container_of(encoder, struct intel_crt, base);
 }
 
+static bool intel_crt_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_crt *crt = intel_encoder_to_crt(encoder);
+       u32 tmp;
+
+       tmp = I915_READ(crt->adpa_reg);
+
+       if (!(tmp & ADPA_DAC_ENABLE))
+               return false;
+
+       if (HAS_PCH_CPT(dev))
+               *pipe = PORT_TO_PIPE_CPT(tmp);
+       else
+               *pipe = PORT_TO_PIPE(tmp);
+
+       return true;
+}
+
 static void intel_disable_crt(struct intel_encoder *encoder)
 {
        struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
@@ -710,6 +731,8 @@ void intel_crt_init(struct drm_device *dev)
 
        crt->base.disable = intel_disable_crt;
        crt->base.enable = intel_enable_crt;
+       crt->base.get_hw_state = intel_crt_get_hw_state;
+       intel_connector->get_hw_state = intel_connector_get_hw_state;
 
        drm_encoder_helper_add(&crt->base.base, &crt_encoder_funcs);
        drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);