drm/i915: Track power references taken for enabled CRTCs

Add wakeref tracking for display power domain references taken for
enabled CRTCs.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20201130212200.2811939-4-imre.deak@intel.com

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

@@ -7576,25 +7576,25 @@ modeset_get_crtc_power_domains(struct intel_crtc_state *crtc_state)
 	enum intel_display_power_domain domain;
 	u64 domains, new_domains, old_domains;
 
-	old_domains = crtc->enabled_power_domains;
-	crtc->enabled_power_domains = new_domains =
-		get_crtc_power_domains(crtc_state);
+	domains = get_crtc_power_domains(crtc_state);
 
-	domains = new_domains & ~old_domains;
+	new_domains = domains & ~crtc->enabled_power_domains.mask;
+	old_domains = crtc->enabled_power_domains.mask & ~domains;
 
-	for_each_power_domain(domain, domains)
-		intel_display_power_get(dev_priv, domain);
+	for_each_power_domain(domain, new_domains)
+		intel_display_power_get_in_set(dev_priv,
+					       &crtc->enabled_power_domains,
+					       domain);
 
-	return old_domains & ~new_domains;
+	return old_domains;
 }
 
-static void modeset_put_power_domains(struct drm_i915_private *dev_priv,
+static void modeset_put_crtc_power_domains(struct intel_crtc *crtc,
 					   u64 domains)
 {
-	enum intel_display_power_domain domain;
-
-	for_each_power_domain(domain, domains)
-		intel_display_power_put_unchecked(dev_priv, domain);
+	intel_display_power_put_mask_in_set(to_i915(crtc->base.dev),
+					    &crtc->enabled_power_domains,
+					    domains);
 }
 
 static void valleyview_crtc_enable(struct intel_atomic_state *state,
@@ -7790,12 +7790,10 @@ static void intel_crtc_disable_noatomic(struct intel_crtc *crtc,
 		to_intel_dbuf_state(dev_priv->dbuf.obj.state);
 	struct intel_crtc_state *crtc_state =
 		to_intel_crtc_state(crtc->base.state);
-	enum intel_display_power_domain domain;
 	struct intel_plane *plane;
 	struct drm_atomic_state *state;
 	struct intel_crtc_state *temp_crtc_state;
 	enum pipe pipe = crtc->pipe;
-	u64 domains;
 	int ret;
 
 	if (!crtc_state->hw.active)
@@ -7851,10 +7849,7 @@ static void intel_crtc_disable_noatomic(struct intel_crtc *crtc,
 	intel_update_watermarks(crtc);
 	intel_disable_shared_dpll(crtc_state);
 
-	domains = crtc->enabled_power_domains;
-	for_each_power_domain(domain, domains)
-		intel_display_power_put_unchecked(dev_priv, domain);
-	crtc->enabled_power_domains = 0;
+	intel_display_power_put_all_in_set(dev_priv, &crtc->enabled_power_domains);
 
 	dev_priv->active_pipes &= ~BIT(pipe);
 	cdclk_state->min_cdclk[pipe] = 0;
@@ -16343,8 +16338,7 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state)
 	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
 		intel_post_plane_update(state, crtc);
 
-		if (put_domains[crtc->pipe])
-			modeset_put_power_domains(dev_priv, put_domains[crtc->pipe]);
+		modeset_put_crtc_power_domains(crtc, put_domains[crtc->pipe]);
 
 		intel_modeset_verify_crtc(crtc, state, old_crtc_state, new_crtc_state);
 
@@ -19562,7 +19556,7 @@ intel_modeset_setup_hw_state(struct drm_device *dev,
 
 		put_domains = modeset_get_crtc_power_domains(crtc_state);
 		if (drm_WARN_ON(dev, put_domains))
-			modeset_put_power_domains(dev_priv, put_domains);
+			modeset_put_crtc_power_domains(crtc, put_domains);
 	}
 
 	intel_display_power_put(dev_priv, POWER_DOMAIN_INIT, wakeref);

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

@@ -1166,7 +1166,7 @@ struct intel_crtc {
 	/* I915_MODE_FLAG_* */
 	u8 mode_flags;
 
-	unsigned long long enabled_power_domains;
+	struct intel_display_power_domain_set enabled_power_domains;
 	struct intel_overlay *overlay;
 
 	struct intel_crtc_state *config;