[Intel-gfx] [PATCH RFC 5/5] drm/i915: Implement intel_crtc_toggle using atomic state

[maarten.lankhorst at linux.intel.com]

From: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>

Assume the function is locked with drm_modeset_lock_all for now.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 131 ++++++++++-------------------------
 1 file changed, 38 insertions(+), 93 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 99a45bee20d8..5a43ac02b925 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -106,8 +106,6 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc);
 static void intel_finish_crtc_commit(struct drm_crtc *crtc);
 static void skl_init_scalers(struct drm_device *dev, struct intel_crtc *intel_crtc,
 	struct intel_crtc_state *crtc_state);
-static void intel_crtc_enable_planes(struct drm_crtc *crtc);
-static void intel_crtc_disable_planes(struct drm_crtc *crtc);
 static void intel_pre_disable_primary(struct drm_crtc *crtc);
 static void intel_post_enable_primary(struct drm_crtc *crtc);
 
@@ -2197,28 +2195,6 @@ void intel_flush_primary_plane(struct drm_i915_private *dev_priv,
 	POSTING_READ(reg);
 }
 
-/**
- * intel_enable_primary_hw_plane - enable the primary plane on a given pipe
- * @plane:  plane to be enabled
- * @crtc: crtc for the plane
- *
- * Enable @plane on @crtc, making sure that the pipe is running first.
- */
-static void intel_enable_primary_hw_plane(struct drm_plane *plane,
-					  struct drm_crtc *crtc)
-{
-	struct drm_device *dev = plane->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-
-	/* If the pipe isn't enabled, we can't pump pixels and may hang */
-	assert_pipe_enabled(dev_priv, intel_crtc->pipe);
-	to_intel_plane_state(plane->state)->visible = true;
-
-	dev_priv->display.update_primary_plane(crtc, plane->fb,
-					       crtc->x, crtc->y);
-}
-
 static bool need_vtd_wa(struct drm_device *dev)
 {
 #ifdef CONFIG_INTEL_IOMMU
@@ -4455,20 +4431,6 @@ static void ironlake_pfit_enable(struct intel_crtc *crtc)
 	}
 }
 
-static void intel_enable_sprite_planes(struct drm_crtc *crtc)
-{
-	struct drm_device *dev = crtc->dev;
-	enum pipe pipe = to_intel_crtc(crtc)->pipe;
-	struct drm_plane *plane;
-	struct intel_plane *intel_plane;
-
-	drm_for_each_legacy_plane(plane, &dev->mode_config.plane_list) {
-		intel_plane = to_intel_plane(plane);
-		if (intel_plane->pipe == pipe)
-			intel_plane_restore(&intel_plane->base);
-	}
-}
-
 void hsw_enable_ips(struct intel_crtc *crtc)
 {
 	struct drm_device *dev = crtc->base.dev;
@@ -4698,44 +4660,6 @@ intel_pre_disable_primary(struct drm_crtc *crtc)
 	hsw_disable_ips(intel_crtc);
 }
 
-static void intel_crtc_enable_planes(struct drm_crtc *crtc)
-{
-	intel_enable_primary_hw_plane(crtc->primary, crtc);
-	intel_enable_sprite_planes(crtc);
-	intel_crtc_update_cursor(crtc, true);
-
-	intel_post_enable_primary(crtc);
-}
-
-static void intel_crtc_disable_planes(struct drm_crtc *crtc)
-{
-	struct drm_device *dev = crtc->dev;
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	struct intel_plane *intel_plane;
-	int pipe = intel_crtc->pipe;
-
-	intel_crtc_wait_for_pending_flips(crtc);
-
-	intel_pre_disable_primary(crtc);
-
-	intel_crtc_dpms_overlay_disable(intel_crtc);
-	for_each_intel_plane(dev, intel_plane) {
-		if (intel_plane->pipe == pipe) {
-			struct drm_crtc *from = intel_plane->base.crtc;
-
-			intel_plane->disable_plane(&intel_plane->base,
-						   from ?: crtc, true);
-		}
-	}
-
-	/*
-	 * FIXME: Once we grow proper nuclear flip support out of this we need
-	 * to compute the mask of flip planes precisely. For the time being
-	 * consider this a flip to a NULL plane.
-	 */
-	intel_frontbuffer_flip(dev, INTEL_FRONTBUFFER_ALL_MASK(pipe));
-}
-
 static void ironlake_crtc_enable(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
@@ -5728,10 +5652,13 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
 void intel_crtc_control(struct drm_crtc *crtc, bool enable)
 {
 	struct drm_device *dev = crtc->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_mode_config *config = &dev->mode_config;
+	struct drm_modeset_acquire_ctx *ctx = config->acquire_ctx;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	enum intel_display_power_domain domain;
-	unsigned long domains;
+	struct intel_crtc_state *pipe_config;
+	struct drm_plane_state *plane_state;
+	struct drm_atomic_state *state;
+	int ret;
 
 	if (enable == intel_crtc->active)
 		return;
@@ -5740,23 +5667,41 @@ void intel_crtc_control(struct drm_crtc *crtc, bool enable)
 		return;
 
 	crtc->state->active = enable;
-	if (enable) {
-		domains = get_crtc_power_domains(crtc);
-		for_each_power_domain(domain, domains)
-			intel_display_power_get(dev_priv, domain);
-		intel_crtc->enabled_power_domains = domains;
 
-		dev_priv->display.crtc_enable(crtc);
-		intel_crtc_enable_planes(crtc);
-	} else {
-		intel_crtc_disable_planes(crtc);
-		dev_priv->display.crtc_disable(crtc);
+	/* this function should be called with drm_modeset_lock_all for now */
+	if (WARN_ON(!ctx))
+		return;
+	lockdep_assert_held(&ctx->ww_ctx);
 
-		domains = intel_crtc->enabled_power_domains;
-		for_each_power_domain(domain, domains)
-			intel_display_power_put(dev_priv, domain);
-		intel_crtc->enabled_power_domains = 0;
+	state = drm_atomic_state_alloc(dev);
+	if (WARN_ON(!state))
+		return;
+
+	state->acquire_ctx = ctx;
+	state->allow_modeset = true;
+
+	pipe_config = intel_atomic_get_crtc_state(state, intel_crtc);
+	if (IS_ERR(pipe_config)) {
+		ret = PTR_ERR(pipe_config);
+		goto err;
+	}
+	pipe_config->base.active = enable;
+
+	plane_state = drm_atomic_get_plane_state(state, crtc->primary);
+	if (IS_ERR(plane_state)) {
+		ret = PTR_ERR(plane_state);
+		goto err;
 	}
+
+	ret = intel_set_mode(crtc, state);
+	if (!ret)
+		return;
+
+	DRM_ERROR("Failed to toggle crtc!\n");
+
+err:
+	DRM_ERROR("Updating crtc active failed with %i\n", ret);
+	drm_atomic_state_free(state);
 }
 
 /**
-- 
2.1.0