[PATCH v3 01/10] drm/i915/skl: Move per-pipe ddb allocations into crtc states

[Lyude]

First part of cleaning up all of the skl watermark code. This moves the
structures for storing the ddb allocations of each pipe into
intel_crtc_state, along with moving the structures for storing the
current ddb allocations active on hardware into intel_crtc.

Changes since v1:
- Don't replace alloc->start = alloc->end = 0;

Signed-off-by: Lyude <cpaul@xxxxxxxxxx>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
Cc: Ville SyrjÃlà <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Matt Roper <matthew.d.roper@xxxxxxxxx
Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_drv.h      |  1 -
 drivers/gpu/drm/i915/intel_display.c | 16 ++++++++-------
 drivers/gpu/drm/i915/intel_drv.h     |  8 +++++---
 drivers/gpu/drm/i915/intel_pm.c      | 40 +++++++++++++++---------------------
 4 files changed, 30 insertions(+), 35 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index fe875b2..ac4287f99 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1641,7 +1641,6 @@ static inline bool skl_ddb_entry_equal(const struct skl_ddb_entry *e1,
 }
 
 struct skl_ddb_allocation {
-	struct skl_ddb_entry pipe[I915_MAX_PIPES];
 	struct skl_ddb_entry plane[I915_MAX_PIPES][I915_MAX_PLANES]; /* packed/uv */
 	struct skl_ddb_entry y_plane[I915_MAX_PIPES][I915_MAX_PLANES];
 };
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 60c699e..7a68cc3 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14246,12 +14246,11 @@ static void skl_update_crtcs(struct drm_atomic_state *state,
 			     unsigned int *crtc_vblank_mask)
 {
 	struct drm_device *dev = state->dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
 	struct drm_crtc *crtc;
+	struct intel_crtc *intel_crtc;
 	struct drm_crtc_state *old_crtc_state;
-	struct skl_ddb_allocation *new_ddb = &intel_state->wm_results.ddb;
-	struct skl_ddb_allocation *cur_ddb = &dev_priv->wm.skl_hw.ddb;
+	struct intel_crtc_state *cstate;
 	unsigned int updated = 0;
 	bool progress;
 	enum pipe pipe;
@@ -14269,12 +14268,14 @@ static void skl_update_crtcs(struct drm_atomic_state *state,
 		for_each_crtc_in_state(state, crtc, old_crtc_state, i) {
 			bool vbl_wait = false;
 			unsigned int cmask = drm_crtc_mask(crtc);
-			pipe = to_intel_crtc(crtc)->pipe;
+
+			intel_crtc = to_intel_crtc(crtc);
+			cstate = to_intel_crtc_state(crtc->state);
+			pipe = intel_crtc->pipe;
 
 			if (updated & cmask || !crtc->state->active)
 				continue;
-			if (skl_ddb_allocation_overlaps(state, cur_ddb, new_ddb,
-							pipe))
+			if (skl_ddb_allocation_overlaps(state, intel_crtc))
 				continue;
 
 			updated |= cmask;
@@ -14285,7 +14286,8 @@ static void skl_update_crtcs(struct drm_atomic_state *state,
 			 * then we need to wait for a vblank to pass for the
 			 * new ddb allocation to take effect.
 			 */
-			if (!skl_ddb_allocation_equals(cur_ddb, new_ddb, pipe) &&
+			if (!skl_ddb_entry_equal(&cstate->wm.skl.ddb,
+						 &intel_crtc->hw_ddb) &&
 			    !crtc->state->active_changed &&
 			    intel_state->wm_results.dirty_pipes != updated)
 				vbl_wait = true;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 5bc1154..10a0cf2 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -496,6 +496,7 @@ struct intel_crtc_wm_state {
 		struct {
 			/* gen9+ only needs 1-step wm programming */
 			struct skl_pipe_wm optimal;
+			struct skl_ddb_entry ddb;
 
 			/* cached plane data rate */
 			unsigned plane_data_rate[I915_MAX_PLANES];
@@ -733,6 +734,9 @@ struct intel_crtc {
 		bool cxsr_allowed;
 	} wm;
 
+	/* gen9+: ddb allocation currently being used */
+	struct skl_ddb_entry hw_ddb;
+
 	int scanline_offset;
 
 	struct {
@@ -1755,9 +1759,7 @@ bool skl_ddb_allocation_equals(const struct skl_ddb_allocation *old,
 			       const struct skl_ddb_allocation *new,
 			       enum pipe pipe);
 bool skl_ddb_allocation_overlaps(struct drm_atomic_state *state,
-				 const struct skl_ddb_allocation *old,
-				 const struct skl_ddb_allocation *new,
-				 enum pipe pipe);
+				 struct intel_crtc *intel_crtc);
 void skl_write_cursor_wm(struct intel_crtc *intel_crtc,
 			 const struct skl_wm_values *wm);
 void skl_write_plane_wm(struct intel_crtc *intel_crtc,
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 48b3904..66586af 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3062,7 +3062,6 @@ skl_ddb_get_pipe_allocation_limits(struct drm_device *dev,
 	struct drm_crtc *for_crtc = cstate->base.crtc;
 	unsigned int pipe_size, ddb_size;
 	int nth_active_pipe;
-	int pipe = to_intel_crtc(for_crtc)->pipe;
 
 	if (WARN_ON(!state) || !cstate->base.active) {
 		alloc->start = 0;
@@ -3090,7 +3089,7 @@ skl_ddb_get_pipe_allocation_limits(struct drm_device *dev,
 	 * we currently hold.
 	 */
 	if (!intel_state->active_pipe_changes) {
-		*alloc = dev_priv->wm.skl_hw.ddb.pipe[pipe];
+		*alloc = to_intel_crtc(for_crtc)->hw_ddb;
 		return;
 	}
 
@@ -3358,7 +3357,7 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
 	struct drm_plane *plane;
 	struct drm_plane_state *pstate;
 	enum pipe pipe = intel_crtc->pipe;
-	struct skl_ddb_entry *alloc = &ddb->pipe[pipe];
+	struct skl_ddb_entry *alloc = &cstate->wm.skl.ddb;
 	uint16_t alloc_size, start, cursor_blocks;
 	uint16_t *minimum = cstate->wm.skl.minimum_blocks;
 	uint16_t *y_minimum = cstate->wm.skl.minimum_y_blocks;
@@ -3374,7 +3373,7 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
 		return 0;
 
 	if (!cstate->base.active) {
-		ddb->pipe[pipe].start = ddb->pipe[pipe].end = 0;
+		alloc->start = alloc->end = 0;
 		return 0;
 	}
 
@@ -3901,14 +3900,6 @@ void skl_write_cursor_wm(struct intel_crtc *intel_crtc,
 			    &wm->ddb.plane[pipe][PLANE_CURSOR]);
 }
 
-bool skl_ddb_allocation_equals(const struct skl_ddb_allocation *old,
-			       const struct skl_ddb_allocation *new,
-			       enum pipe pipe)
-{
-	return new->pipe[pipe].start == old->pipe[pipe].start &&
-	       new->pipe[pipe].end == old->pipe[pipe].end;
-}
-
 static inline bool skl_ddb_entries_overlap(const struct skl_ddb_entry *a,
 					   const struct skl_ddb_entry *b)
 {
@@ -3916,22 +3907,22 @@ static inline bool skl_ddb_entries_overlap(const struct skl_ddb_entry *a,
 }
 
 bool skl_ddb_allocation_overlaps(struct drm_atomic_state *state,
-				 const struct skl_ddb_allocation *old,
-				 const struct skl_ddb_allocation *new,
-				 enum pipe pipe)
+				 struct intel_crtc *intel_crtc)
 {
-	struct drm_device *dev = state->dev;
-	struct intel_crtc *intel_crtc;
-	enum pipe otherp;
+	struct drm_crtc *other_crtc;
+	struct drm_crtc_state *other_cstate;
+	struct intel_crtc *other_intel_crtc;
+	const struct skl_ddb_entry *ddb =
+		&to_intel_crtc_state(intel_crtc->base.state)->wm.skl.ddb;
+	int i;
 
-	for_each_intel_crtc(dev, intel_crtc) {
-		otherp = intel_crtc->pipe;
+	for_each_crtc_in_state(state, other_crtc, other_cstate, i) {
+		other_intel_crtc = to_intel_crtc(other_crtc);
 
-		if (otherp == pipe)
+		if (other_intel_crtc == intel_crtc)
 			continue;
 
-		if (skl_ddb_entries_overlap(&new->pipe[pipe],
-					    &old->pipe[otherp]))
+		if (skl_ddb_entries_overlap(ddb, &other_intel_crtc->hw_ddb))
 			return true;
 	}
 
@@ -4096,7 +4087,6 @@ skl_copy_wm_for_pipe(struct skl_wm_values *dst,
 	memcpy(dst->plane_trans[pipe], src->plane_trans[pipe],
 	       sizeof(dst->plane_trans[pipe]));
 
-	dst->ddb.pipe[pipe] = src->ddb.pipe[pipe];
 	memcpy(dst->ddb.y_plane[pipe], src->ddb.y_plane[pipe],
 	       sizeof(dst->ddb.y_plane[pipe]));
 	memcpy(dst->ddb.plane[pipe], src->ddb.plane[pipe],
@@ -4204,6 +4194,8 @@ static void skl_update_wm(struct drm_crtc *crtc)
 
 	skl_copy_wm_for_pipe(hw_vals, results, pipe);
 
+	intel_crtc->hw_ddb = cstate->wm.skl.ddb;
+
 	mutex_unlock(&dev_priv->wm.wm_mutex);
 }
 
-- 
2.7.4