[Intel-gfx] [PATCH v2 6/6] drm/i915: Extract intel_bw_check_data_rate()

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Extract the data rate calculation loop out from
intel_bw_atomic_check() to make it a bit less confusing.

Cc: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_bw.c | 63 +++++++++++++++----------
 1 file changed, 37 insertions(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
index fa03f0935b6d..963b99d3557c 100644
--- a/drivers/gpu/drm/i915/display/intel_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -835,31 +835,12 @@ static u16 icl_qgv_points_mask(struct drm_i915_private *i915)
 	return mask;
 }
 
-int intel_bw_atomic_check(struct intel_atomic_state *state)
+static int intel_bw_check_data_rate(struct intel_atomic_state *state)
 {
-	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
-	struct intel_crtc_state *new_crtc_state, *old_crtc_state;
-	struct intel_bw_state *new_bw_state = NULL;
-	const struct intel_bw_state *old_bw_state = NULL;
-	unsigned int data_rate;
-	unsigned int num_active_planes;
+	struct drm_i915_private *i915 = to_i915(state->base.dev);
+	const struct intel_crtc_state *new_crtc_state, *old_crtc_state;
 	struct intel_crtc *crtc;
-	int i, ret;
-	u32 allowed_points = 0;
-	unsigned int max_bw_point = 0, max_bw = 0;
-	unsigned int num_qgv_points = dev_priv->max_bw[0].num_qgv_points;
-	unsigned int num_psf_gv_points = dev_priv->max_bw[0].num_psf_gv_points;
-
-	/* FIXME earlier gens need some checks too */
-	if (DISPLAY_VER(dev_priv) < 11)
-		return 0;
-
-	/*
-	 * If we already have the bw state then recompute everything
-	 * even if pipe data_rate / active_planes didn't change.
-	 * Other things (such as SAGV) may have changed.
-	 */
-	new_bw_state = intel_atomic_get_new_bw_state(state);
+	int i;
 
 	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
 					    new_crtc_state, i) {
@@ -871,6 +852,7 @@ int intel_bw_atomic_check(struct intel_atomic_state *state)
 			intel_bw_crtc_num_active_planes(old_crtc_state);
 		unsigned int new_active_planes =
 			intel_bw_crtc_num_active_planes(new_crtc_state);
+		struct intel_bw_state *new_bw_state;
 
 		/*
 		 * Avoid locking the bw state when
@@ -887,13 +869,42 @@ int intel_bw_atomic_check(struct intel_atomic_state *state)
 		new_bw_state->data_rate[crtc->pipe] = new_data_rate;
 		new_bw_state->num_active_planes[crtc->pipe] = new_active_planes;
 
-		drm_dbg_kms(&dev_priv->drm,
-			    "pipe %c data rate %u num active planes %u\n",
-			    pipe_name(crtc->pipe),
+		drm_dbg_kms(&i915->drm,
+			    "[CRTC:%d:%s] data rate %u num active planes %u\n",
+			    crtc->base.base.id, crtc->base.name,
 			    new_bw_state->data_rate[crtc->pipe],
 			    new_bw_state->num_active_planes[crtc->pipe]);
 	}
 
+	return 0;
+}
+
+int intel_bw_atomic_check(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	const struct intel_bw_state *old_bw_state;
+	struct intel_bw_state *new_bw_state;
+	unsigned int data_rate;
+	unsigned int num_active_planes;
+	int i, ret;
+	u32 allowed_points = 0;
+	unsigned int max_bw_point = 0, max_bw = 0;
+	unsigned int num_qgv_points = dev_priv->max_bw[0].num_qgv_points;
+	unsigned int num_psf_gv_points = dev_priv->max_bw[0].num_psf_gv_points;
+
+	/* FIXME earlier gens need some checks too */
+	if (DISPLAY_VER(dev_priv) < 11)
+		return 0;
+
+	ret = intel_bw_check_data_rate(state);
+	if (ret)
+		return ret;
+
+	/*
+	 * If we don't have a bw_state by now then none of the
+	 * inputs to the QGV mask computation may have changed.
+	 */
+	new_bw_state = intel_atomic_get_new_bw_state(state);
 	if (!new_bw_state)
 		return 0;
 
-- 
2.34.1