video: driver: Migrate to threaded irq

Migrate to threaded IRQ from workqueue based
IRQ handling.

Change-Id: I5cf2ecaa6d9b8d67698bbaf41e8d5ff77249ab1c
Signed-off-by: Priyanka Gujjula <pgujjula@codeaurora.org>

driver/vidc/inc/msm_vidc_core.h

@@ -85,8 +85,6 @@ struct msm_vidc_core {
 	struct msm_vidc_mem_addr               sfr;
 	struct msm_vidc_mem_addr               iface_q_table;
 	struct msm_vidc_iface_q_info           iface_queues[VIDC_IFACEQ_NUMQ];
-	struct work_struct                     device_work;
-	struct workqueue_struct               *device_workq;
 	struct delayed_work                    pm_work;
 	struct workqueue_struct               *pm_workq;
 	struct workqueue_struct               *batch_workq;

driver/vidc/inc/venus_hfi.h

@@ -58,9 +58,9 @@ int venus_hfi_trigger_ssr(struct msm_vidc_core *core, u32 type,
 int venus_hfi_scale_clocks(struct msm_vidc_inst* inst, u64 freq);
 int venus_hfi_scale_buses(struct msm_vidc_inst* inst, u64 bw_ddr, u64 bw_llcc);
 
-void venus_hfi_work_handler(struct work_struct *work);
 void venus_hfi_pm_work_handler(struct work_struct *work);
 irqreturn_t venus_hfi_isr(int irq, void *data);
+irqreturn_t venus_hfi_isr_handler(int irq, void *data);
 
 int __write_register_masked(struct msm_vidc_core *core,
 		u32 reg, u32 value, u32 mask);

driver/vidc/src/msm_vidc_probe.c

@@ -64,10 +64,10 @@ static int msm_vidc_init_irq(struct msm_vidc_core *core)
 		goto exit;
 	}
 
-	rc = request_irq(dt->irq, venus_hfi_isr, IRQF_TRIGGER_HIGH,
-				     "msm_vidc", core);
-	if (unlikely(rc)) {
-		d_vpr_e("%s: request_irq failed\n", __func__);
+	rc = devm_request_threaded_irq(&core->pdev->dev, dt->irq, venus_hfi_isr,
+			venus_hfi_isr_handler, IRQF_TRIGGER_HIGH, "msm-vidc", core);
+	if (rc) {
+		d_vpr_e("%s: Failed to allocate venus IRQ\n", __func__);
 		goto exit;
 	}
 	disable_irq_nosync(dt->irq);
@@ -191,12 +191,8 @@ static int msm_vidc_deinitialize_core(struct msm_vidc_core *core)
 	if (core->pm_workq)
 		destroy_workqueue(core->pm_workq);
 
-	if (core->device_workq)
-		destroy_workqueue(core->device_workq);
-
 	core->batch_workq = NULL;
 	core->pm_workq = NULL;
-	core->device_workq = NULL;
 
 	return rc;
 }
@@ -213,13 +209,6 @@ static int msm_vidc_initialize_core(struct msm_vidc_core *core)
 
 	msm_vidc_change_core_state(core, MSM_VIDC_CORE_DEINIT, __func__);
 
-	core->device_workq = create_singlethread_workqueue("device_workq");
-	if (!core->device_workq) {
-		d_vpr_e("%s: create device workq failed\n", __func__);
-		rc = -EINVAL;
-		goto exit;
-	}
-
 	core->pm_workq = create_singlethread_workqueue("pm_workq");
 	if (!core->pm_workq) {
 		d_vpr_e("%s: create pm workq failed\n", __func__);
@@ -254,7 +243,6 @@ static int msm_vidc_initialize_core(struct msm_vidc_core *core)
 	INIT_LIST_HEAD(&core->instances);
 	INIT_LIST_HEAD(&core->dangling_instances);
 
-	INIT_WORK(&core->device_work, venus_hfi_work_handler);
 	INIT_DELAYED_WORK(&core->pm_work, venus_hfi_pm_work_handler);
 	INIT_DELAYED_WORK(&core->fw_unload_work, msm_vidc_fw_unload_handler);
 	INIT_WORK(&core->ssr_work, msm_vidc_ssr_handler);
@@ -269,11 +257,8 @@ exit:
 		destroy_workqueue(core->batch_workq);
 	if (core->pm_workq)
 		destroy_workqueue(core->pm_workq);
-	if (core->device_workq)
-		destroy_workqueue(core->device_workq);
 	core->batch_workq = NULL;
 	core->pm_workq = NULL;
-	core->device_workq = NULL;
 
 	return rc;
 }

driver/vidc/src/venus_hfi.c

@@ -2673,24 +2673,19 @@ static int __response_handler(struct msm_vidc_core *core)
 
 irqreturn_t venus_hfi_isr(int irq, void *data)
 {
-	struct msm_vidc_core *core = data;
-
 	disable_irq_nosync(irq);
-	queue_work(core->device_workq, &core->device_work);
-
-	return IRQ_HANDLED;
+	return IRQ_WAKE_THREAD;
 }
 
-void venus_hfi_work_handler(struct work_struct *work)
+irqreturn_t venus_hfi_isr_handler(int irq, void *data)
 {
-	struct msm_vidc_core *core;
+	struct msm_vidc_core *core = data;
 	int num_responses = 0, rc = 0;
 
 	d_vpr_l("%s()\n", __func__);
-	core = container_of(work, struct msm_vidc_core, device_work);
 	if (!core) {
 		d_vpr_e("%s: invalid params\n", __func__);
-		return;
+		return IRQ_NONE;
 	}
 
 	core_lock(core, __func__);
@@ -2698,16 +2693,18 @@ void venus_hfi_work_handler(struct work_struct *work)
 	if (rc) {
 		d_vpr_e("%s: Power on failed\n", __func__);
 		core_unlock(core, __func__);
-		goto err_no_work;
+		goto exit;
 	}
 	call_venus_op(core, clear_interrupt, core);
 	core_unlock(core, __func__);
 
 	num_responses = __response_handler(core);
 
-err_no_work:
+exit:
 	if (!call_venus_op(core, watchdog, core, core->intr_status))
-		enable_irq(core->dt->irq);
+		enable_irq(irq);
+
+	return IRQ_HANDLED;
 }
 
 void venus_hfi_pm_work_handler(struct work_struct *work)