[PATCH 1/2] drm/i915: wrap crtc enable/disable

[Jesse Barnes <jbarnes@virtuousgeek.org>]

This allows us to hide queuing of enable/disable later.
---
 drivers/gpu/drm/i915/i915_drv.c      |  2 +-
 drivers/gpu/drm/i915/i915_drv.h      |  4 +-
 drivers/gpu/drm/i915/intel_display.c | 83 +++++++++++++++++++++++++++++-------
 drivers/gpu/drm/i915/intel_drv.h     |  1 +
 4 files changed, 71 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index af9fe02..8438e4e 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -543,7 +543,7 @@ static int i915_drm_freeze(struct drm_device *dev)
 		 */
 		mutex_lock(&dev->mode_config.mutex);
 		list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
-			dev_priv->display.crtc_disable(crtc);
+			intel_queue_crtc_disable(crtc);
 		mutex_unlock(&dev->mode_config.mutex);
 
 		DRM_ERROR("disabled crtcs\n");
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index efc57fe..a1088fd 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -407,8 +407,8 @@ struct drm_i915_display_funcs {
 	int (*crtc_mode_set)(struct drm_crtc *crtc,
 			     int x, int y,
 			     struct drm_framebuffer *old_fb);
-	void (*crtc_enable)(struct drm_crtc *crtc);
-	void (*crtc_disable)(struct drm_crtc *crtc);
+	void (*_crtc_enable)(struct drm_crtc *crtc);
+	void (*_crtc_disable)(struct drm_crtc *crtc);
 	void (*off)(struct drm_crtc *crtc);
 	void (*write_eld)(struct drm_connector *connector,
 			  struct drm_crtc *crtc,
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e5c1850..006ec10 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1725,6 +1725,46 @@ static void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv)
 	I915_WRITE(_TRANSA_CHICKEN2, val);
 }
 
+static void intel_crtc_disable_work(struct work_struct *work)
+{
+	struct intel_crtc *intel_crtc = container_of(work, struct intel_crtc,
+						     disable_work);
+}
+
+void intel_queue_crtc_disable(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+	queue_work(dev_priv->wq, &intel_crtc->disable_work);
+}
+
+static void intel_crtc_enable_work(struct work_struct *work)
+{
+	struct intel_crtc *intel_crtc = container_of(work, struct intel_crtc,
+						     enable_work);
+}
+
+static void intel_queue_crtc_enable(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+	queue_work(dev_priv->wq, &intel_crtc->enable_work);
+}
+
+static void intel_sync_crtc(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+	flush_work(&intel_crtc->disable_work);
+	flush_work(&intel_crtc->enable_work);
+}
+
 /**
  * intel_enable_pipe - enable a pipe, asserting requirements
  * @dev_priv: i915 private structure
@@ -4288,7 +4328,6 @@ static void intel_crtc_update_sarea(struct drm_crtc *crtc,
 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;
 
@@ -4296,9 +4335,9 @@ void intel_crtc_update_dpms(struct drm_crtc *crtc)
 		enable |= intel_encoder->connectors_active;
 
 	if (enable)
-		dev_priv->display.crtc_enable(crtc);
+		intel_queue_crtc_enable(crtc);
 	else
-		dev_priv->display.crtc_disable(crtc);
+		intel_queue_crtc_disable(crtc);
 
 	intel_crtc_update_sarea(crtc, enable);
 }
@@ -4313,7 +4352,7 @@ static void intel_crtc_disable(struct drm_crtc *crtc)
 	/* crtc should still be enabled when we disable it. */
 	WARN_ON(!crtc->enabled);
 
-	dev_priv->display.crtc_disable(crtc);
+	dev_priv->display._crtc_disable(crtc);
 	intel_crtc->eld_vld = false;
 	intel_crtc_update_sarea(crtc, false);
 	dev_priv->display.off(crtc);
@@ -7519,6 +7558,8 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
 		goto fail;
 	}
 
+	intel_sync_crtc(crtc);
+
 	/* we only need to pin inside GTT if cursor is non-phy */
 	mutex_lock(&dev->struct_mutex);
 	if (!dev_priv->info->cursor_needs_physical) {
@@ -7604,6 +7645,8 @@ static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
 	intel_crtc->cursor_x = clamp_t(int, x, SHRT_MIN, SHRT_MAX);
 	intel_crtc->cursor_y = clamp_t(int, y, SHRT_MIN, SHRT_MAX);
 
+	intel_sync_crtc(crtc);
+
 	if (intel_crtc->active)
 		intel_crtc_update_cursor(crtc, intel_crtc->cursor_bo != NULL);
 
@@ -8602,6 +8645,9 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 	if (work == NULL)
 		return -ENOMEM;
 
+	/* Complete any pending CRTC enable/disable */
+	intel_sync_crtc(crtc);
+
 	work->event = event;
 	work->crtc = crtc;
 	work->old_fb_obj = to_intel_framebuffer(old_fb)->obj;
@@ -9608,8 +9654,10 @@ static int __intel_set_mode(struct drm_crtc *crtc,
 		intel_crtc_disable(&intel_crtc->base);
 
 	for_each_intel_crtc_masked(dev, prepare_pipes, intel_crtc) {
-		if (intel_crtc->base.enabled)
-			dev_priv->display.crtc_disable(&intel_crtc->base);
+		if (intel_crtc->base.enabled) {
+			intel_queue_crtc_disable(&intel_crtc->base);
+			intel_sync_crtc(&intel_crtc->base);
+		}
 	}
 
 	/* crtc->mode is already used by the ->mode_set callbacks, hence we need
@@ -9641,7 +9689,7 @@ static int __intel_set_mode(struct drm_crtc *crtc,
 
 	/* Now enable the clocks, plane, pipe, and connectors that we set up. */
 	for_each_intel_crtc_masked(dev, prepare_pipes, intel_crtc)
-		dev_priv->display.crtc_enable(&intel_crtc->base);
+		intel_queue_crtc_enable(&intel_crtc->base);
 
 	if (modeset_pipes) {
 		/* Store real post-adjustment hardware mode. */
@@ -10145,6 +10193,9 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
 	dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = &intel_crtc->base;
 
 	drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
+
+	INIT_WORK(intel_crtc->enable_work, intel_crtc_enable_work);
+	INIT_WORK(intel_crtc->disable_work, intel_crtc_disable_work);
 }
 
 enum pipe intel_get_pipe_from_connector(struct intel_connector *connector)
@@ -10540,29 +10591,29 @@ static void intel_init_display(struct drm_device *dev)
 	if (HAS_DDI(dev)) {
 		dev_priv->display.get_pipe_config = haswell_get_pipe_config;
 		dev_priv->display.crtc_mode_set = haswell_crtc_mode_set;
-		dev_priv->display.crtc_enable = haswell_crtc_enable;
-		dev_priv->display.crtc_disable = haswell_crtc_disable;
+		dev_priv->display._crtc_enable = haswell_crtc_enable;
+		dev_priv->display._crtc_disable = haswell_crtc_disable;
 		dev_priv->display.off = haswell_crtc_off;
 		dev_priv->display.update_plane = ironlake_update_plane;
 	} else if (HAS_PCH_SPLIT(dev)) {
 		dev_priv->display.get_pipe_config = ironlake_get_pipe_config;
 		dev_priv->display.crtc_mode_set = ironlake_crtc_mode_set;
-		dev_priv->display.crtc_enable = ironlake_crtc_enable;
-		dev_priv->display.crtc_disable = ironlake_crtc_disable;
+		dev_priv->display._crtc_enable = ironlake_crtc_enable;
+		dev_priv->display._crtc_disable = ironlake_crtc_disable;
 		dev_priv->display.off = ironlake_crtc_off;
 		dev_priv->display.update_plane = ironlake_update_plane;
 	} else if (IS_VALLEYVIEW(dev)) {
 		dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
 		dev_priv->display.crtc_mode_set = i9xx_crtc_mode_set;
-		dev_priv->display.crtc_enable = valleyview_crtc_enable;
-		dev_priv->display.crtc_disable = i9xx_crtc_disable;
+		dev_priv->display._crtc_enable = valleyview_crtc_enable;
+		dev_priv->display._crtc_disable = i9xx_crtc_disable;
 		dev_priv->display.off = i9xx_crtc_off;
 		dev_priv->display.update_plane = i9xx_update_plane;
 	} else {
 		dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
 		dev_priv->display.crtc_mode_set = i9xx_crtc_mode_set;
-		dev_priv->display.crtc_enable = i9xx_crtc_enable;
-		dev_priv->display.crtc_disable = i9xx_crtc_disable;
+		dev_priv->display._crtc_enable = i9xx_crtc_enable;
+		dev_priv->display._crtc_disable = i9xx_crtc_disable;
 		dev_priv->display.off = i9xx_crtc_off;
 		dev_priv->display.update_plane = i9xx_update_plane;
 	}
@@ -10953,7 +11004,7 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc)
 		 * ...  */
 		plane = crtc->plane;
 		crtc->plane = !plane;
-		dev_priv->display.crtc_disable(&crtc->base);
+		intel_queue_crtc_disable(&crtc->base);
 		crtc->plane = plane;
 
 		/* ... and break all links. */
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index ea62673..bfae2ef 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -707,6 +707,7 @@ void hsw_enable_ips(struct intel_crtc *crtc);
 void hsw_disable_ips(struct intel_crtc *crtc);
 void intel_display_set_init_power(struct drm_device *dev, bool enable);
 int valleyview_get_vco(struct drm_i915_private *dev_priv);
+void intel_queue_crtc_disable(struct drm_crtc *crtc);
 
 /* intel_dp.c */
 void intel_dp_init(struct drm_device *dev, int output_reg, enum port port);
-- 
1.8.4.2