drm/i915: Relocate intel_atomic_check_planes()

Move all the intel_atomic_check_planes() machinery into
intel_atomic_plane.c in order to declutter intel_display.c.

v2: Rebase due to intel_display changes

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250212164330.16891-11-ville.syrjala@linux.intel.com

Author: vsyrjala

drivers/gpu/drm/i915/display/intel_atomic_plane.c

@@ -52,6 +52,7 @@
 #include "intel_fb.h"
 #include "intel_fb_pin.h"
 #include "skl_scaler.h"
+#include "skl_universal_plane.h"
 #include "skl_watermark.h"
 
 static void intel_plane_state_reset(struct intel_plane_state *plane_state,
@@ -1223,3 +1224,298 @@ void intel_plane_init_cursor_vblank_work(struct intel_plane_state *old_plane_sta
 	drm_vblank_work_init(&old_plane_state->unpin_work, old_plane_state->uapi.crtc,
 			     intel_cursor_unpin_work);
 }
+
+static void link_nv12_planes(struct intel_crtc_state *crtc_state,
+			     struct intel_plane_state *uv_plane_state,
+			     struct intel_plane_state *y_plane_state)
+{
+	struct intel_display *display = to_intel_display(uv_plane_state);
+	struct intel_plane *uv_plane = to_intel_plane(uv_plane_state->uapi.plane);
+	struct intel_plane *y_plane = to_intel_plane(y_plane_state->uapi.plane);
+
+	drm_dbg_kms(display->drm, "UV plane [PLANE:%d:%s] using Y plane [PLANE:%d:%s]\n",
+		    uv_plane->base.base.id, uv_plane->base.name,
+		    y_plane->base.base.id, y_plane->base.name);
+
+	uv_plane_state->planar_linked_plane = y_plane;
+
+	y_plane_state->is_y_plane = true;
+	y_plane_state->planar_linked_plane = uv_plane;
+
+	crtc_state->enabled_planes |= BIT(y_plane->id);
+	crtc_state->active_planes |= BIT(y_plane->id);
+	crtc_state->update_planes |= BIT(y_plane->id);
+
+	crtc_state->data_rate[y_plane->id] = crtc_state->data_rate_y[uv_plane->id];
+	crtc_state->rel_data_rate[y_plane->id] = crtc_state->rel_data_rate_y[uv_plane->id];
+
+	/* Copy parameters to Y plane */
+	intel_plane_copy_hw_state(y_plane_state, uv_plane_state);
+	y_plane_state->uapi.src = uv_plane_state->uapi.src;
+	y_plane_state->uapi.dst = uv_plane_state->uapi.dst;
+
+	y_plane_state->ctl = uv_plane_state->ctl;
+	y_plane_state->color_ctl = uv_plane_state->color_ctl;
+	y_plane_state->view = uv_plane_state->view;
+	y_plane_state->decrypt = uv_plane_state->decrypt;
+
+	icl_link_nv12_planes(uv_plane_state, y_plane_state);
+}
+
+static void unlink_nv12_plane(struct intel_crtc_state *crtc_state,
+			      struct intel_plane_state *plane_state)
+{
+	struct intel_display *display = to_intel_display(plane_state);
+	struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
+
+	plane_state->planar_linked_plane = NULL;
+
+	if (!plane_state->is_y_plane)
+		return;
+
+	drm_WARN_ON(display->drm, plane_state->uapi.visible);
+
+	plane_state->is_y_plane = false;
+
+	crtc_state->enabled_planes &= ~BIT(plane->id);
+	crtc_state->active_planes &= ~BIT(plane->id);
+	crtc_state->update_planes |= BIT(plane->id);
+	crtc_state->data_rate[plane->id] = 0;
+	crtc_state->rel_data_rate[plane->id] = 0;
+}
+
+static int icl_check_nv12_planes(struct intel_atomic_state *state,
+				 struct intel_crtc *crtc)
+{
+	struct intel_display *display = to_intel_display(state);
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	struct intel_crtc_state *crtc_state =
+		intel_atomic_get_new_crtc_state(state, crtc);
+	struct intel_plane_state *plane_state;
+	struct intel_plane *plane;
+	int i;
+
+	if (DISPLAY_VER(dev_priv) < 11)
+		return 0;
+
+	/*
+	 * Destroy all old plane links and make the Y plane invisible
+	 * in the crtc_state->active_planes mask.
+	 */
+	for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
+		if (plane->pipe != crtc->pipe)
+			continue;
+
+		if (plane_state->planar_linked_plane)
+			unlink_nv12_plane(crtc_state, plane_state);
+	}
+
+	if (!crtc_state->nv12_planes)
+		return 0;
+
+	for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
+		struct intel_plane_state *y_plane_state = NULL;
+		struct intel_plane *y_plane;
+
+		if (plane->pipe != crtc->pipe)
+			continue;
+
+		if ((crtc_state->nv12_planes & BIT(plane->id)) == 0)
+			continue;
+
+		for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, y_plane) {
+			if (!icl_is_nv12_y_plane(display, y_plane->id))
+				continue;
+
+			if (crtc_state->active_planes & BIT(y_plane->id))
+				continue;
+
+			y_plane_state = intel_atomic_get_plane_state(state, y_plane);
+			if (IS_ERR(y_plane_state))
+				return PTR_ERR(y_plane_state);
+
+			break;
+		}
+
+		if (!y_plane_state) {
+			drm_dbg_kms(&dev_priv->drm,
+				    "[CRTC:%d:%s] need %d free Y planes for planar YUV\n",
+				    crtc->base.base.id, crtc->base.name,
+				    hweight8(crtc_state->nv12_planes));
+			return -EINVAL;
+		}
+
+		link_nv12_planes(crtc_state, plane_state, y_plane_state);
+	}
+
+	return 0;
+}
+
+static int intel_crtc_add_planes_to_state(struct intel_atomic_state *state,
+					  struct intel_crtc *crtc,
+					  u8 plane_ids_mask)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	struct intel_plane *plane;
+
+	for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
+		struct intel_plane_state *plane_state;
+
+		if ((plane_ids_mask & BIT(plane->id)) == 0)
+			continue;
+
+		plane_state = intel_atomic_get_plane_state(state, plane);
+		if (IS_ERR(plane_state))
+			return PTR_ERR(plane_state);
+	}
+
+	return 0;
+}
+
+int intel_atomic_add_affected_planes(struct intel_atomic_state *state,
+				     struct intel_crtc *crtc)
+{
+	const struct intel_crtc_state *old_crtc_state =
+		intel_atomic_get_old_crtc_state(state, crtc);
+	const struct intel_crtc_state *new_crtc_state =
+		intel_atomic_get_new_crtc_state(state, crtc);
+
+	return intel_crtc_add_planes_to_state(state, crtc,
+					      old_crtc_state->enabled_planes |
+					      new_crtc_state->enabled_planes);
+}
+
+static bool active_planes_affects_min_cdclk(struct drm_i915_private *dev_priv)
+{
+	/* See {hsw,vlv,ivb}_plane_ratio() */
+	return IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv) ||
+		IS_CHERRYVIEW(dev_priv) || IS_VALLEYVIEW(dev_priv) ||
+		IS_IVYBRIDGE(dev_priv);
+}
+
+static u8 intel_joiner_affected_planes(struct intel_atomic_state *state,
+				       u8 joined_pipes)
+{
+	const struct intel_plane_state *plane_state;
+	struct intel_plane *plane;
+	u8 affected_planes = 0;
+	int i;
+
+	for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
+		struct intel_plane *linked = plane_state->planar_linked_plane;
+
+		if ((joined_pipes & BIT(plane->pipe)) == 0)
+			continue;
+
+		affected_planes |= BIT(plane->id);
+		if (linked)
+			affected_planes |= BIT(linked->id);
+	}
+
+	return affected_planes;
+}
+
+static int intel_joiner_add_affected_planes(struct intel_atomic_state *state,
+					    u8 joined_pipes)
+{
+	u8 prev_affected_planes, affected_planes = 0;
+
+	/*
+	 * We want all the joined pipes to have the same
+	 * set of planes in the atomic state, to make sure
+	 * state copying always works correctly, and the
+	 * UV<->Y plane linkage is always up to date.
+	 * Keep pulling planes in until we've determined
+	 * the full set of affected planes. A bit complicated
+	 * on account of each pipe being capable of selecting
+	 * their own Y planes independently of the other pipes,
+	 * and the selection being done from the set of
+	 * inactive planes.
+	 */
+	do {
+		struct intel_crtc *crtc;
+
+		for_each_intel_crtc_in_pipe_mask(state->base.dev, crtc, joined_pipes) {
+			int ret;
+
+			ret = intel_crtc_add_planes_to_state(state, crtc, affected_planes);
+			if (ret)
+				return ret;
+		}
+
+		prev_affected_planes = affected_planes;
+		affected_planes = intel_joiner_affected_planes(state, joined_pipes);
+	} while (affected_planes != prev_affected_planes);
+
+	return 0;
+}
+
+static int intel_add_affected_planes(struct intel_atomic_state *state)
+{
+	const struct intel_crtc_state *crtc_state;
+	struct intel_crtc *crtc;
+	int i;
+
+	for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) {
+		int ret;
+
+		ret = intel_joiner_add_affected_planes(state, intel_crtc_joined_pipe_mask(crtc_state));
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+int intel_atomic_check_planes(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	struct intel_crtc_state *old_crtc_state, *new_crtc_state;
+	struct intel_plane_state __maybe_unused *plane_state;
+	struct intel_plane *plane;
+	struct intel_crtc *crtc;
+	int i, ret;
+
+	ret = intel_add_affected_planes(state);
+	if (ret)
+		return ret;
+
+	for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
+		ret = intel_plane_atomic_check(state, plane);
+		if (ret) {
+			drm_dbg_atomic(&dev_priv->drm,
+				       "[PLANE:%d:%s] atomic driver check failed\n",
+				       plane->base.base.id, plane->base.name);
+			return ret;
+		}
+	}
+
+	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+					    new_crtc_state, i) {
+		u8 old_active_planes, new_active_planes;
+
+		ret = icl_check_nv12_planes(state, crtc);
+		if (ret)
+			return ret;
+
+		/*
+		 * On some platforms the number of active planes affects
+		 * the planes' minimum cdclk calculation. Add such planes
+		 * to the state before we compute the minimum cdclk.
+		 */
+		if (!active_planes_affects_min_cdclk(dev_priv))
+			continue;
+
+		old_active_planes = old_crtc_state->active_planes & ~BIT(PLANE_CURSOR);
+		new_active_planes = new_crtc_state->active_planes & ~BIT(PLANE_CURSOR);
+
+		if (hweight8(old_active_planes) == hweight8(new_active_planes))
+			continue;
+
+		ret = intel_crtc_add_planes_to_state(state, crtc, new_active_planes);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}

drivers/gpu/drm/i915/display/intel_atomic_plane.h

@@ -81,5 +81,8 @@ void intel_plane_helper_add(struct intel_plane *plane);
 bool intel_plane_needs_physical(struct intel_plane *plane);
 void intel_plane_init_cursor_vblank_work(struct intel_plane_state *old_plane_state,
 					 struct intel_plane_state *new_plane_state);
+int intel_atomic_add_affected_planes(struct intel_atomic_state *state,
+				     struct intel_crtc *crtc);
+int intel_atomic_check_planes(struct intel_atomic_state *state);
 
 #endif /* __INTEL_ATOMIC_PLANE_H__ */