[1/3] OMAP: omap_device: optionally auto-adjust device activate/deactivate latencies (fwd) - queued for 2.6.34

Commit Message

Paul Walmsley Jan. 14, 2010, 1:40 a.m. UTC

None

Patch

diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h
index dc1fac1..76d4917 100644
--- a/arch/arm/plat-omap/include/plat/omap_device.h
+++ b/arch/arm/plat-omap/include/plat/omap_device.h
@@ -131,11 +131,15 @@  int omap_device_enable_clocks(struct omap_device *od);
  */
 struct omap_device_pm_latency {
 	u32 deactivate_lat;
+	u32 deactivate_lat_worst;
 	int (*deactivate_func)(struct omap_device *od);
 	u32 activate_lat;
+	u32 activate_lat_worst;
 	int (*activate_func)(struct omap_device *od);
+	u32 flags;
 };
 
+#define OMAP_DEVICE_LATENCY_AUTO_ADJUST BIT(1)
 
 /* Get omap_device pointer from platform_device pointer */
 #define to_omap_device(x) container_of((x), struct omap_device, pdev)
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index 1e5648d..d8c75c8 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -148,10 +148,22 @@  static int _omap_device_activate(struct omap_device *od, u8 ignore_lat)
 			 "%llu nsec\n", od->pdev.name, od->pm_lat_level,
 			 act_lat);
 
-		WARN(act_lat > odpl->activate_lat, "omap_device: %s.%d: "
-		     "activate step %d took longer than expected (%llu > %d)\n",
-		     od->pdev.name, od->pdev.id, od->pm_lat_level,
-		     act_lat, odpl->activate_lat);
+		if (act_lat > odpl->activate_lat) {
+			odpl->activate_lat_worst = act_lat;
+			if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) {
+				odpl->activate_lat = act_lat;
+				pr_warning("omap_device: %s.%d: new worst case "
+					   "activate latency %d: %llu\n",
+					   od->pdev.name, od->pdev.id,
+					   od->pm_lat_level, act_lat);
+			} else
+				pr_warning("omap_device: %s.%d: activate "
+					   "latency %d higher than exptected. "
+					   "(%llu > %d)\n",
+					   od->pdev.name, od->pdev.id,
+					   od->pm_lat_level, act_lat,
+					   odpl->activate_lat);
+		}
 
 		od->dev_wakeup_lat -= odpl->activate_lat;
 	}
@@ -204,10 +216,23 @@  static int _omap_device_deactivate(struct omap_device *od, u8 ignore_lat)
 			 "%llu nsec\n", od->pdev.name, od->pm_lat_level,
 			 deact_lat);
 
-		WARN(deact_lat > odpl->deactivate_lat, "omap_device: %s.%d: "
-		     "deactivate step %d took longer than expected "
-		     "(%llu > %d)\n", od->pdev.name, od->pdev.id,
-		     od->pm_lat_level, deact_lat, odpl->deactivate_lat);
+		if (deact_lat > odpl->deactivate_lat) {
+			odpl->deactivate_lat_worst = deact_lat;
+			if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) {
+				odpl->deactivate_lat = deact_lat;
+				pr_warning("omap_device: %s.%d: new worst case "
+					   "deactivate latency %d: %llu\n",
+					   od->pdev.name, od->pdev.id,
+					   od->pm_lat_level, deact_lat);
+			} else
+				pr_warning("omap_device: %s.%d: deactivate "
+					   "latency %d higher than exptected. "
+					   "(%llu > %d)\n",
+					   od->pdev.name, od->pdev.id,
+					   od->pm_lat_level, deact_lat,
+					   odpl->deactivate_lat);
+		}
+
 
 		od->dev_wakeup_lat += odpl->activate_lat;