drm/i915: Extract intel_bw_modeset_checks()

Pull the new_bw_state->active_pipes computation out from
intel_compute_sagv_mask() and move it into the intel_bw.c
(which is arguably the correct place for it).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250326162544.3642-10-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

4 files changed, 36 insertions, 9 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
index 47de106c608f..dcf2b711b83a 100644
--- a/drivers/gpu/drm/i915/display/intel_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -1414,6 +1414,35 @@ static int intel_bw_check_data_rate(struct intel_atomic_state *state, bool *chan
 	return 0;
 }
 
+int intel_bw_modeset_checks(struct intel_atomic_state *state)
+{
+	struct intel_display *display = to_intel_display(state);
+	const struct intel_bw_state *old_bw_state;
+	struct intel_bw_state *new_bw_state;
+
+	if (DISPLAY_VER(display) < 9)
+		return 0;
+
+	new_bw_state = intel_atomic_get_bw_state(state);
+	if (IS_ERR(new_bw_state))
+		return PTR_ERR(new_bw_state);
+
+	old_bw_state = intel_atomic_get_old_bw_state(state);
+
+	new_bw_state->active_pipes =
+		intel_calc_active_pipes(state, old_bw_state->active_pipes);
+
+	if (new_bw_state->active_pipes != old_bw_state->active_pipes) {
+		int ret;
+
+		ret = intel_atomic_lock_global_state(&new_bw_state->base);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
 int intel_bw_atomic_check(struct intel_atomic_state *state)
 {
 	struct intel_display *display = to_intel_display(state);
diff --git a/drivers/gpu/drm/i915/display/intel_bw.h b/drivers/gpu/drm/i915/display/intel_bw.h
index 4a6a033f11e4..ac435674c3ed 100644
--- a/drivers/gpu/drm/i915/display/intel_bw.h
+++ b/drivers/gpu/drm/i915/display/intel_bw.h
@@ -66,6 +66,7 @@ intel_atomic_get_bw_state(struct intel_atomic_state *state);
 
 void intel_bw_init_hw(struct intel_display *display);
 int intel_bw_init(struct intel_display *display);
+int intel_bw_modeset_checks(struct intel_atomic_state *state);
 int intel_bw_atomic_check(struct intel_atomic_state *state);
 int icl_pcode_restrict_qgv_points(struct intel_display *display,
 				  u32 points_mask);
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index d448ee4f4a10..2a58a1a16cdf 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -6443,6 +6443,12 @@ int intel_atomic_check(struct drm_device *dev,
 	if (ret)
 		goto fail;
 
+	if (any_ms) {
+		ret = intel_bw_modeset_checks(state);
+		if (ret)
+			goto fail;
+	}
+
 	ret = intel_compute_global_watermarks(state);
 	if (ret)
 		goto fail;
diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index a6af5e4ba4d4..1da1bfeadd9c 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -501,15 +501,6 @@ static int intel_compute_sagv_mask(struct intel_atomic_state *state)
 	if (!new_bw_state)
 		return 0;
 
-	new_bw_state->active_pipes =
-		intel_calc_active_pipes(state, old_bw_state->active_pipes);
-
-	if (new_bw_state->active_pipes != old_bw_state->active_pipes) {
-		ret = intel_atomic_lock_global_state(&new_bw_state->base);
-		if (ret)
-			return ret;
-	}
-
 	if (intel_can_enable_sagv(i915, new_bw_state) !=
 	    intel_can_enable_sagv(i915, old_bw_state)) {
 		ret = intel_atomic_serialize_global_state(&new_bw_state->base);