drm/i915: push commit_output_state past crtc disabling

This requires a few changes
- We still need a noop function for crtc->disable, becuase the fb
  helper is a bit too intimate with the crtc helper.
- We need to clear crtc->fb ourselves in intel_crtc_disable now that
  we no longer rely on the helper's disable_unused_functions to do
  that.
- We need to split out the sare update code, becuase the crtc code
  can't call update_dpms any more, it needs to disable the crtc
  unconditionally. This is because we now keep onto the encoder ->
  crtc mapping of the (still) active output pipe configuration.
- To check that we really disable a crtc that still has encoders,
  insert a WARN_ON(!enabled) in the crtc disable function.
- Lastly, we need to walk over all crtcs to update their enabled state
  after having called commit_output_state - for all disabled crtcs the
  crtc helper code has done that for us previously.

v2: Update connector dpms and encoder->connectors_active after
disabling the crtc, too.

v3: Noop-out intel_encoder_disable. Similarly to the crtc disable
callback used by the crtc helper code we can't simply remove all these
encoder callbacks: The fb helper (which we still use) has a rather
incetious relationship with the crtc helper code ...

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

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 16cbf95..b843bc0 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3462,26 +3462,13 @@ static void i9xx_crtc_off(struct drm_crtc *crtc)
 {
 }
 
-/**
- * Sets the power management mode of the pipe and plane.
- */
-void intel_crtc_update_dpms(struct drm_crtc *crtc)
+static void intel_crtc_update_sarea(struct drm_crtc *crtc,
+                                   bool enabled)
 {
        struct drm_device *dev = crtc->dev;
-       struct drm_i915_private *dev_priv = dev->dev_private;
        struct drm_i915_master_private *master_priv;
        struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-       struct intel_encoder *intel_encoder;
        int pipe = intel_crtc->pipe;
-       bool enabled, enable = false;
-
-       for_each_encoder_on_crtc(dev, crtc, intel_encoder)
-               enable |= intel_encoder->connectors_active;
-
-       if (enable)
-               dev_priv->display.crtc_enable(crtc);
-       else
-               dev_priv->display.crtc_disable(crtc);
 
        if (!dev->primary->master)
                return;
@@ -3490,8 +3477,6 @@ void intel_crtc_update_dpms(struct drm_crtc *crtc)
        if (!master_priv->sarea_priv)
                return;
 
-       enabled = crtc->enabled && enable;
-
        switch (pipe) {
        case 0:
                master_priv->sarea_priv->pipeA_w = enabled ? crtc->mode.hdisplay : 0;
@@ -3507,14 +3492,42 @@ void intel_crtc_update_dpms(struct drm_crtc *crtc)
        }
 }
 
+/**
+ * Sets the power management mode of the pipe and plane.
+ */
+void intel_crtc_update_dpms(struct drm_crtc *crtc)
+{
+       struct drm_device *dev = crtc->dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       struct intel_encoder *intel_encoder;
+       bool enable = false;
+
+       for_each_encoder_on_crtc(dev, crtc, intel_encoder)
+               enable |= intel_encoder->connectors_active;
+
+       if (enable)
+               dev_priv->display.crtc_enable(crtc);
+       else
+               dev_priv->display.crtc_disable(crtc);
+
+       intel_crtc_update_sarea(crtc, enable);
+}
+
+static void intel_crtc_noop(struct drm_crtc *crtc)
+{
+}
+
 static void intel_crtc_disable(struct drm_crtc *crtc)
 {
        struct drm_device *dev = crtc->dev;
+       struct drm_connector *connector;
        struct drm_i915_private *dev_priv = dev->dev_private;
 
-       /* crtc->disable is only called when we have no encoders, hence this
-        * will disable the pipe. */
-       intel_crtc_update_dpms(crtc);
+       /* crtc should still be enabled when we disable it. */
+       WARN_ON(!crtc->enabled);
+
+       dev_priv->display.crtc_disable(crtc);
+       intel_crtc_update_sarea(crtc, false);
        dev_priv->display.off(crtc);
 
        assert_plane_disabled(dev->dev_private, to_intel_crtc(crtc)->plane);
@@ -3524,14 +3537,24 @@ static void intel_crtc_disable(struct drm_crtc *crtc)
                mutex_lock(&dev->struct_mutex);
                intel_unpin_fb_obj(to_intel_framebuffer(crtc->fb)->obj);
                mutex_unlock(&dev->struct_mutex);
+               crtc->fb = NULL;
+       }
+
+       /* Update computed state. */
+       list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+               if (!connector->encoder || !connector->encoder->crtc)
+                       continue;
+
+               if (connector->encoder->crtc != crtc)
+                       continue;
+
+               connector->dpms = DRM_MODE_DPMS_OFF;
+               to_intel_encoder(connector->encoder)->connectors_active = false;
        }
 }
 
 void intel_encoder_disable(struct drm_encoder *encoder)
 {
-       struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
-
-       intel_encoder->disable(intel_encoder);
 }
 
 void intel_encoder_destroy(struct drm_encoder *encoder)
@@ -6560,7 +6583,7 @@ free_work:
 static struct drm_crtc_helper_funcs intel_helper_funcs = {
        .mode_set_base_atomic = intel_pipe_set_base_atomic,
        .load_lut = intel_crtc_load_lut,
-       .disable = intel_crtc_disable,
+       .disable = intel_crtc_noop,
 };
 
 bool intel_encoder_check_is_cloned(struct intel_encoder *encoder)
@@ -6823,12 +6846,14 @@ bool intel_set_mode(struct drm_crtc *crtc,
        DRM_DEBUG_KMS("set mode pipe masks: modeset: %x, prepare: %x, disable: %x\n",
                      modeset_pipes, prepare_pipes, disable_pipes);
 
-       intel_modeset_commit_output_state(dev);
+       for_each_intel_crtc_masked(dev, disable_pipes, intel_crtc)
+               intel_crtc_disable(&intel_crtc->base);
 
-       crtc->enabled = drm_helper_crtc_in_use(crtc);
+       intel_modeset_commit_output_state(dev);
 
-       for_each_intel_crtc_masked(dev, disable_pipes, intel_crtc)
-               drm_helper_disable_unused_functions(dev);
+       list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list,
+                           base.head)
+               intel_crtc->base.enabled = drm_helper_crtc_in_use(crtc);
 
        saved_hwmode = crtc->hwmode;
        saved_mode = crtc->mode;