msm: ipa3: Decrement the IPA clock in delayed workqueue

While handling the suspend interrupt due aggregation timeout
possible to IEOB interrupt will be delayed. To handle this
scenario adding changes to decrement clock in delays work queue.

Change-Id: I4b9afebf5a9582f6c94aa5a9cd2eb0904b7171b8
Signed-off-by: Ashok Vuyyuru <[email protected]>

drivers/platform/msm/ipa/ipa_v3/ipa.c

@@ -131,6 +131,8 @@ static void ipa_dec_clients_disable_clks_on_wq(struct work_struct *work);
 static DECLARE_DELAYED_WORK(ipa_dec_clients_disable_clks_on_wq_work,
 	ipa_dec_clients_disable_clks_on_wq);
 
+static DECLARE_DELAYED_WORK(ipa_dec_clients_disable_clks_on_suspend_irq_wq_work,
+	ipa_dec_clients_disable_clks_on_wq);
 static void ipa_inc_clients_enable_clks_on_wq(struct work_struct *work);
 static DECLARE_WORK(ipa_inc_clients_enable_clks_on_wq_work,
 	ipa_inc_clients_enable_clks_on_wq);
@@ -6222,6 +6224,22 @@ void ipa3_dec_client_disable_clks_no_block(
 		&ipa_dec_clients_disable_clks_on_wq_work, 0);
 }
 
+/**
+ * ipa3_dec_client_disable_clks_delay_wq() - Decrease active clients counter
+ * in delayed workqueue.
+ *
+ * Return codes:
+ * None
+ */
+void ipa3_dec_client_disable_clks_delay_wq(
+	struct ipa_active_client_logging_info *id, unsigned long delay)
+{
+	ipa3_active_clients_log_dec(id, true);
+
+	if (!queue_delayed_work(ipa3_ctx->power_mgmt_wq,
+		&ipa_dec_clients_disable_clks_on_suspend_irq_wq_work, delay))
+		IPAERR("Scheduling delayed work failed\n");
+}
 /**
  * ipa3_inc_acquire_wakelock() - Increase active clients counter, and
  * acquire wakelock if necessary

drivers/platform/msm/ipa/ipa_v3/ipa_i.h

@@ -3073,6 +3073,8 @@ int ipa3_inc_client_enable_clks_no_block(struct ipa_active_client_logging_info
 		*id);
 void ipa3_dec_client_disable_clks_no_block(
 	struct ipa_active_client_logging_info *id);
+void ipa3_dec_client_disable_clks_delay_wq(
+		struct ipa_active_client_logging_info *id, unsigned long delay);
 void ipa3_active_clients_log_dec(struct ipa_active_client_logging_info *id,
 		bool int_ctx);
 void ipa3_active_clients_log_inc(struct ipa_active_client_logging_info *id,

drivers/platform/msm/ipa/ipa_v3/ipa_interrupts.c

@@ -9,6 +9,7 @@
 #define INTERRUPT_WORKQUEUE_NAME "ipa_interrupt_wq"
 #define DIS_SUSPEND_INTERRUPT_TIMEOUT 5
 #define IPA_IRQ_NUM_MAX 32
+#define IPA_AGG_BUSY_TIMEOUT (msecs_to_jiffies(5))
 
 struct ipa3_interrupt_info {
 	ipa_irq_handler_t handler;
@@ -384,10 +385,14 @@ static void ipa3_process_interrupts(bool isr_context)
 
 static void ipa3_interrupt_defer(struct work_struct *work)
 {
+	struct ipa_active_client_logging_info log_info;
+
 	IPADBG("processing interrupts in wq\n");
 	IPA_ACTIVE_CLIENTS_INC_SIMPLE();
 	ipa3_process_interrupts(false);
-	IPA_ACTIVE_CLIENTS_DEC_SIMPLE();
+	IPA_ACTIVE_CLIENTS_PREP_SIMPLE(log_info);
+	/* Delay the devote process to have time to get gsi ieob irq */
+	ipa3_dec_client_disable_clks_delay_wq(&log_info, IPA_AGG_BUSY_TIMEOUT);
 	IPADBG("Done\n");
 }