drm/i915/wm: abstract intel_dbuf_pmdemand_needs_update()

Add intel_dbuf_pmdemand_needs_update() helper to avoid looking at struct
intel_dbuf_state internals outside of skl_watermark.c.

With this, we can also move to_intel_dbuf_state(),
intel_atomic_get_old_dbuf_state(), and intel_atomic_get_new_dbuf_state()
inside skl_watermark.c.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://lore.kernel.org/r/b493f259d0d3db047151fee18d7e801ad469fa88.1750847509.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

3 files changed, 33 insertions, 21 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_pmdemand.c b/drivers/gpu/drm/i915/display/intel_pmdemand.c
index 93d5ee36fff1..0f1501c456df 100644
--- a/drivers/gpu/drm/i915/display/intel_pmdemand.c
+++ b/drivers/gpu/drm/i915/display/intel_pmdemand.c
@@ -294,11 +294,9 @@ intel_pmdemand_connector_needs_update(struct intel_atomic_state *state)
 
 static bool intel_pmdemand_needs_update(struct intel_atomic_state *state)
 {
-	struct intel_display *display = to_intel_display(state);
 	const struct intel_bw_state *new_bw_state, *old_bw_state;
 	const struct intel_cdclk_state *new_cdclk_state, *old_cdclk_state;
 	const struct intel_crtc_state *new_crtc_state, *old_crtc_state;
-	const struct intel_dbuf_state *new_dbuf_state, *old_dbuf_state;
 	struct intel_crtc *crtc;
 	int i;
 
@@ -308,19 +306,9 @@ static bool intel_pmdemand_needs_update(struct intel_atomic_state *state)
 	    old_bw_state->qgv_point_peakbw)
 		return true;
 
-	new_dbuf_state = intel_atomic_get_new_dbuf_state(state);
-	old_dbuf_state = intel_atomic_get_old_dbuf_state(state);
-	if (new_dbuf_state &&
-	    new_dbuf_state->active_pipes != old_dbuf_state->active_pipes)
+	if (intel_dbuf_pmdemand_needs_update(state))
 		return true;
 
-	if (DISPLAY_VER(display) < 30) {
-		if (new_dbuf_state &&
-		    new_dbuf_state->enabled_slices !=
-		    old_dbuf_state->enabled_slices)
-			return true;
-	}
-
 	new_cdclk_state = intel_atomic_get_new_cdclk_state(state);
 	old_cdclk_state = intel_atomic_get_old_cdclk_state(state);
 	if (new_cdclk_state &&
diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index d39fabd09938..9ae9f02b11ca 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -39,6 +39,14 @@
  */
 #define DSB_EXE_TIME 100
 
+#define to_intel_dbuf_state(global_state) \
+	container_of_const((global_state), struct intel_dbuf_state, base)
+
+#define intel_atomic_get_old_dbuf_state(state) \
+	to_intel_dbuf_state(intel_atomic_get_old_global_obj_state(state, &to_intel_display(state)->dbuf.obj))
+#define intel_atomic_get_new_dbuf_state(state) \
+	to_intel_dbuf_state(intel_atomic_get_new_global_obj_state(state, &to_intel_display(state)->dbuf.obj))
+
 static void skl_sagv_disable(struct intel_display *display);
 
 /* Stores plane specific WM parameters */
@@ -3696,6 +3704,28 @@ void intel_dbuf_post_plane_update(struct intel_atomic_state *state)
 	gen9_dbuf_slices_update(display, new_slices);
 }
 
+bool intel_dbuf_pmdemand_needs_update(struct intel_atomic_state *state)
+{
+	struct intel_display *display = to_intel_display(state);
+	const struct intel_dbuf_state *new_dbuf_state, *old_dbuf_state;
+
+	new_dbuf_state = intel_atomic_get_new_dbuf_state(state);
+	old_dbuf_state = intel_atomic_get_old_dbuf_state(state);
+
+	if (new_dbuf_state &&
+	    new_dbuf_state->active_pipes != old_dbuf_state->active_pipes)
+		return true;
+
+	if (DISPLAY_VER(display) < 30) {
+		if (new_dbuf_state &&
+		    new_dbuf_state->enabled_slices !=
+		    old_dbuf_state->enabled_slices)
+			return true;
+	}
+
+	return false;
+}
+
 static void skl_mbus_sanitize(struct intel_display *display)
 {
 	struct intel_dbuf_state *dbuf_state =
diff --git a/drivers/gpu/drm/i915/display/skl_watermark.h b/drivers/gpu/drm/i915/display/skl_watermark.h
index 95b0b599d5c3..3b9a0b254cff 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.h
+++ b/drivers/gpu/drm/i915/display/skl_watermark.h
@@ -78,14 +78,6 @@ struct intel_dbuf_state {
 struct intel_dbuf_state *
 intel_atomic_get_dbuf_state(struct intel_atomic_state *state);
 
-#define to_intel_dbuf_state(global_state) \
-	container_of_const((global_state), struct intel_dbuf_state, base)
-
-#define intel_atomic_get_old_dbuf_state(state) \
-	to_intel_dbuf_state(intel_atomic_get_old_global_obj_state(state, &to_intel_display(state)->dbuf.obj))
-#define intel_atomic_get_new_dbuf_state(state) \
-	to_intel_dbuf_state(intel_atomic_get_new_global_obj_state(state, &to_intel_display(state)->dbuf.obj))
-
 int intel_dbuf_init(struct intel_display *display);
 int intel_dbuf_state_set_mdclk_cdclk_ratio(struct intel_atomic_state *state,
 					   int ratio);
@@ -98,5 +90,7 @@ void intel_dbuf_mbus_pre_ddb_update(struct intel_atomic_state *state);
 void intel_dbuf_mbus_post_ddb_update(struct intel_atomic_state *state);
 void intel_program_dpkgc_latency(struct intel_atomic_state *state);
 
+bool intel_dbuf_pmdemand_needs_update(struct intel_atomic_state *state);
+
 #endif /* __SKL_WATERMARK_H__ */