Merge "msm: kgsl: Disallow L2PC during wake up from SLUMBER"

Documentation/devicetree/bindings/gpu/adreno.txt

@@ -141,6 +141,9 @@ Optional Properties:
 				rendering thread is running on masked CPUs.
 				Bit 0 is for CPU-0, bit 1 is for CPU-1...
 
+- qcom,l2pc-update-queue:
+				Disables L2PC on masked CPUs at queue time when it's true.
+
 - qcom,snapshot-size:
 				Specify the size of snapshot in bytes. This will override
 				snapshot size defined in the driver code.

drivers/gpu/msm/adreno.c

@@ -1309,6 +1309,10 @@ static int _adreno_start(struct adreno_device *adreno_dev)
 	/* make sure ADRENO_DEVICE_STARTED is not set here */
 	BUG_ON(test_bit(ADRENO_DEVICE_STARTED, &adreno_dev->priv));
 
+	/* disallow l2pc during wake up to improve GPU wake up time */
+	kgsl_pwrctrl_update_l2pc(&adreno_dev->dev,
+			KGSL_L2PC_WAKEUP_TIMEOUT);
+
 	pm_qos_update_request(&device->pwrctrl.pm_qos_req_dma,
 			pmqos_wakeup_vote);
 

drivers/gpu/msm/adreno_dispatch.c

@@ -1460,7 +1460,9 @@ int adreno_dispatcher_queue_cmds(struct kgsl_device_private *dev_priv,
 
 	spin_unlock(&drawctxt->lock);
 
-	kgsl_pwrctrl_update_l2pc(&adreno_dev->dev);
+	if (device->pwrctrl.l2pc_update_queue)
+		kgsl_pwrctrl_update_l2pc(&adreno_dev->dev,
+				KGSL_L2PC_QUEUE_TIMEOUT);
 
 	/* Add the context to the dispatcher pending list */
 	dispatcher_queue_context(adreno_dev, drawctxt);

drivers/gpu/msm/kgsl_pwrctrl.c

@@ -43,13 +43,6 @@
 
 #define DEFAULT_BUS_P 25
 
-/*
- * The effective duration of qos request in usecs. After
- * timeout, qos request is cancelled automatically.
- * Kept 80ms default, inline with default GPU idle time.
- */
-#define KGSL_L2PC_CPU_TIMEOUT	(80 * 1000)
-
 /* Order deeply matters here because reasons. New entries go on the end */
 static const char * const clocks[] = {
 	"src_clk",
@@ -520,12 +513,14 @@ EXPORT_SYMBOL(kgsl_pwrctrl_set_constraint);
 /**
  * kgsl_pwrctrl_update_l2pc() - Update existing qos request
  * @device: Pointer to the kgsl_device struct
+ * @timeout_us: the effective duration of qos request in usecs.
  *
  * Updates an existing qos request to avoid L2PC on the
  * CPUs (which are selected through dtsi) on which GPU
  * thread is running. This would help for performance.
  */
-void kgsl_pwrctrl_update_l2pc(struct kgsl_device *device)
+void kgsl_pwrctrl_update_l2pc(struct kgsl_device *device,
+			unsigned long timeout_us)
 {
 	int cpu;
 
@@ -539,7 +534,7 @@ void kgsl_pwrctrl_update_l2pc(struct kgsl_device *device)
 		pm_qos_update_request_timeout(
 				&device->pwrctrl.l2pc_cpus_qos,
 				device->pwrctrl.pm_qos_cpu_mask_latency,
-				KGSL_L2PC_CPU_TIMEOUT);
+				timeout_us);
 	}
 }
 EXPORT_SYMBOL(kgsl_pwrctrl_update_l2pc);
@@ -2201,6 +2196,10 @@ int kgsl_pwrctrl_init(struct kgsl_device *device)
 	kgsl_property_read_u32(device, "qcom,l2pc-cpu-mask",
 			&pwr->l2pc_cpus_mask);
 
+	pwr->l2pc_update_queue = of_property_read_bool(
+				device->pdev->dev.of_node,
+				"qcom,l2pc-update-queue");
+
 	pm_runtime_enable(&pdev->dev);
 
 	ocmem_bus_node = of_find_node_by_name(

drivers/gpu/msm/kgsl_pwrctrl.h

@@ -51,6 +51,19 @@
 #define KGSL_PWR_DEL_LIMIT 1
 #define KGSL_PWR_SET_LIMIT 2
 
+/*
+ * The effective duration of qos request in usecs at queue time.
+ * After timeout, qos request is cancelled automatically.
+ * Kept 80ms default, inline with default GPU idle time.
+ */
+#define KGSL_L2PC_QUEUE_TIMEOUT	(80 * 1000)
+
+/*
+ * The effective duration of qos request in usecs at wakeup time.
+ * After timeout, qos request is cancelled automatically.
+ */
+#define KGSL_L2PC_WAKEUP_TIMEOUT (10 * 1000)
+
 enum kgsl_pwrctrl_timer_type {
 	KGSL_PWR_IDLE_TIMER,
 };
@@ -128,6 +141,7 @@ struct kgsl_regulator {
  * @irq_name - resource name for the IRQ
  * @clk_stats - structure of clock statistics
  * @l2pc_cpus_mask - mask to avoid L2PC on masked CPUs
+ * @l2pc_update_queue - Boolean flag to avoid L2PC on masked CPUs at queue time
  * @l2pc_cpus_qos - qos structure to avoid L2PC on CPUs
  * @pm_qos_req_dma - the power management quality of service structure
  * @pm_qos_active_latency - allowed CPU latency in microseconds when active
@@ -183,6 +197,7 @@ struct kgsl_pwrctrl {
 	const char *irq_name;
 	struct kgsl_clk_stats clk_stats;
 	unsigned int l2pc_cpus_mask;
+	bool l2pc_update_queue;
 	struct pm_qos_request l2pc_cpus_qos;
 	struct pm_qos_request pm_qos_req_dma;
 	unsigned int pm_qos_active_latency;
@@ -249,5 +264,6 @@ int kgsl_active_count_wait(struct kgsl_device *device, int count);
 void kgsl_pwrctrl_busy_time(struct kgsl_device *device, u64 time, u64 busy);
 void kgsl_pwrctrl_set_constraint(struct kgsl_device *device,
 			struct kgsl_pwr_constraint *pwrc, uint32_t id);
-void kgsl_pwrctrl_update_l2pc(struct kgsl_device *device);
+void kgsl_pwrctrl_update_l2pc(struct kgsl_device *device,
+			unsigned long timeout_us);
 #endif /* __KGSL_PWRCTRL_H */