waipio: driver: Add support for fw unload and power collapse

If required, Firmware can be unloaded after every session.
Power collapse is enabled by default.

Change-Id: Ie014a26ae600816d8713cd34826f1f9a77088e4a
Signed-off-by: Chinmay Sawarkar <chinmays@codeaurora.org>

driver/platform/waipio/src/msm_vidc_waipio.c

@@ -61,10 +61,10 @@ static struct msm_platform_core_capability core_data_waipio[] = {
 	{MAX_MBPF_B_FRAME, 32640}, /* 3840x2176/256 */
 	{MAX_MBPS_B_FRAME, 1958400}, /* 3840x2176/256 MBs@60fps */
 	{NUM_VPP_PIPE, 4},
-	{SW_PC, 0},
-	{SW_PC_DELAY, 1500}, /* 1500 ms */
+	{SW_PC, 1},
+	{SW_PC_DELAY, 20000}, /* 20000 ms (>HW_RESPONSE_TIMEOUT)*/
 	{FW_UNLOAD, 0},
-	{FW_UNLOAD_DELAY, 1000}, /* 1000 ms */
+	{FW_UNLOAD_DELAY, 25000}, /* 25000 ms (>PC_DELAY)*/
 	{HW_RESPONSE_TIMEOUT, 15000}, /* 1000 ms */
 	{DEBUG_TIMEOUT, 0},
 	// TODO: review below entries, and if required rename as PREFETCH

driver/vidc/inc/msm_vidc_driver.h

@@ -226,7 +226,7 @@ int msm_vidc_get_inst_capability(struct msm_vidc_inst *inst);
 int msm_vidc_change_core_state(struct msm_vidc_core *core,
 	enum msm_vidc_core_state request_state, const char *func);
 int msm_vidc_core_init(struct msm_vidc_core *core);
-int msm_vidc_core_deinit(struct msm_vidc_core *core);
+int msm_vidc_core_deinit(struct msm_vidc_core *core, bool force);
 int msm_vidc_core_timeout(struct msm_vidc_core *core);
 int msm_vidc_smmu_fault_handler(struct iommu_domain *domain,
 		struct device *dev, unsigned long iova, int flags, void *data);
@@ -298,5 +298,6 @@ void inst_lock(struct msm_vidc_inst *inst, const char *function);
 void inst_unlock(struct msm_vidc_inst *inst, const char *function);
 bool inst_lock_check(struct msm_vidc_inst *inst, const char *function);
 int msm_vidc_update_meta_port_settings(struct msm_vidc_inst *inst);
+void msm_vidc_schedule_core_deinit(struct msm_vidc_core *core);
 #endif // _MSM_VIDC_DRIVER_H_
 

driver/vidc/src/msm_vidc.c

@@ -817,11 +817,15 @@ int msm_vidc_close(void *instance)
 {
 	int rc = 0;
 	struct msm_vidc_inst *inst = instance;
+	struct msm_vidc_core *core;
 
 	if (!inst) {
 		d_vpr_e("%s: invalid params\n", __func__);
 		return -EINVAL;
 	}
+
+	core = inst->core;
+
 	s_vpr_h(inst->sid, "%s()\n", __func__);
 	mutex_lock(&inst->lock);
 	msm_vidc_session_close(inst);
@@ -829,6 +833,8 @@ int msm_vidc_close(void *instance)
 	msm_vidc_destroy_buffers(inst);
 	mutex_unlock(&inst->lock);
 	put_inst(inst);
+	msm_vidc_schedule_core_deinit(core);
+
 	return rc;
 }
 EXPORT_SYMBOL(msm_vidc_close);

driver/vidc/src/msm_vidc_driver.c

@@ -442,11 +442,6 @@ int msm_vidc_change_core_state(struct msm_vidc_core *core,
 		return -EINVAL;
 	}
 
-	if (!request_state) {
-		d_vpr_e("%s: invalid core request state\n", func);
-		return -EINVAL;
-	}
-
 	d_vpr_h("%s: core state changed from %s to %s\n",
 		func, core_state_name(core->state),
 		core_state_name(request_state));
@@ -2457,7 +2452,7 @@ error:
 	return rc;
 }
 
-int msm_vidc_core_deinit(struct msm_vidc_core *core)
+int msm_vidc_core_deinit(struct msm_vidc_core *core, bool force)
 {
 	int rc = 0;
 	struct msm_vidc_inst *inst, *dummy;
@@ -2466,10 +2461,14 @@ int msm_vidc_core_deinit(struct msm_vidc_core *core)
 		d_vpr_e("%s: invalid params\n", __func__);
 		return -EINVAL;
 	}
+
 	mutex_lock(&core->lock);
 	d_vpr_h("%s()\n", __func__);
 	if (core->state == MSM_VIDC_CORE_DEINIT)
 		goto unlock;
+	if (!force)
+		if (!list_empty(&core->instances))
+			goto unlock;
 
 	venus_hfi_core_deinit(core);
 	msm_vidc_deinit_instance_caps(core);
@@ -2542,7 +2541,7 @@ unlock:
 
 int msm_vidc_core_timeout(struct msm_vidc_core *core)
 {
-	return msm_vidc_core_deinit(core);
+	return msm_vidc_core_deinit(core, true);
 }
 
 int msm_vidc_smmu_fault_handler(struct iommu_domain *domain,
@@ -2567,6 +2566,20 @@ void msm_vidc_pm_work_handler(struct work_struct *work)
 
 void msm_vidc_fw_unload_handler(struct work_struct *work)
 {
+	struct msm_vidc_core *core = NULL;
+	int rc = 0;
+
+	core = container_of(work, struct msm_vidc_core, fw_unload_work.work);
+	if (!core) {
+		d_vpr_e("%s: invalid work or core handle\n", __func__);
+		return;
+	}
+
+	d_vpr_h("%s: deinitializing video core\n",__func__);
+	rc = msm_vidc_core_deinit(core, false);
+	if (rc)
+		d_vpr_e("%s: Failed to deinit core\n", __func__);
+
 }
 
 void msm_vidc_batch_handler(struct work_struct *work)
@@ -2811,3 +2824,23 @@ int msm_vidc_update_meta_port_settings(struct msm_vidc_inst *inst)
 	}
 	return 0;
 }
+
+void msm_vidc_schedule_core_deinit(struct msm_vidc_core *core)
+{
+	if (!core)
+		return;
+
+	if (!core->capabilities[FW_UNLOAD].value)
+		return;
+
+	cancel_delayed_work(&core->fw_unload_work);
+
+	schedule_delayed_work(&core->fw_unload_work,
+		msecs_to_jiffies(core->capabilities[FW_UNLOAD_DELAY].value));
+
+	d_vpr_h("firmware unload delayed by %u ms\n",
+		core->capabilities[FW_UNLOAD_DELAY].value);
+
+	return;
+}
+

driver/vidc/src/venus_hfi_response.c

@@ -230,7 +230,7 @@ static int handle_system_error(struct msm_vidc_core *core,
 	struct hfi_packet *pkt)
 {
 	d_vpr_e("%s: system error received\n", __func__);
-	msm_vidc_core_deinit(core);
+	msm_vidc_core_deinit(core, true);
 	return 0;
 }