msm: eva: Remove unused dsp power flags

Avoid mis-use of old flag that could lead to failure in
powering collapse EVA when a session becomes idle for 3s.

Change-Id: I954bc0972b1f627b274b78659c34626127619af5
Signed-off-by: George Shen <quic_sqiao@quicinc.com>

msm/eva/cvp_hfi.c

@@ -247,30 +247,15 @@ static void __dump_packet(u8 *packet, enum cvp_msg_prio log_level)
 	}
 }
 
-static int __dsp_suspend(struct iris_hfi_device *device, bool force, u32 flags)
+static int __dsp_suspend(struct iris_hfi_device *device, bool force)
 {
 	int rc;
-	struct cvp_hal_session *temp;
 
 	if (msm_cvp_dsp_disable)
 		return 0;
 
-	list_for_each_entry(temp, &device->sess_head, list) {
-		/* if forceful suspend, don't check session pause info */
-		if (force)
-			continue;
-
-		/* don't suspend if cvp session is not paused */
-		if (!(temp->flags & SESSION_PAUSE)) {
-			dprintk(CVP_DSP,
-				"%s: cvp session %x not paused %d\n",
-				__func__, hash32_ptr(temp), gfa_cv.state);
-			return -EBUSY;
-		}
-	}
-
 	dprintk(CVP_DSP, "%s: suspend dsp\n", __func__);
-	rc = cvp_dsp_suspend(flags);
+	rc = cvp_dsp_suspend(force);
 	if (rc) {
 		dprintk(CVP_ERR, "%s: dsp suspend failed with error %d\n",
 			__func__, rc);
@@ -281,7 +266,7 @@ static int __dsp_suspend(struct iris_hfi_device *device, bool force, u32 flags)
 	return 0;
 }
 
-static int __dsp_resume(struct iris_hfi_device *device, u32 flags)
+static int __dsp_resume(struct iris_hfi_device *device)
 {
 	int rc;
 
@@ -289,7 +274,7 @@ static int __dsp_resume(struct iris_hfi_device *device, u32 flags)
 		return 0;
 
 	dprintk(CVP_DSP, "%s: resume dsp\n", __func__);
-	rc = cvp_dsp_resume(flags);
+	rc = cvp_dsp_resume();
 	if (rc) {
 		dprintk(CVP_ERR,
 			"%s: dsp resume failed with error %d\n",
@@ -301,7 +286,7 @@ static int __dsp_resume(struct iris_hfi_device *device, u32 flags)
 	return rc;
 }
 
-static int __dsp_shutdown(struct iris_hfi_device *device, u32 flags)
+static int __dsp_shutdown(struct iris_hfi_device *device)
 {
 	int rc;
 
@@ -309,7 +294,7 @@ static int __dsp_shutdown(struct iris_hfi_device *device, u32 flags)
 		return 0;
 
 	dprintk(CVP_DSP, "%s: shutdown dsp\n", __func__);
-	rc = cvp_dsp_shutdown(flags);
+	rc = cvp_dsp_shutdown();
 	if (rc) {
 		dprintk(CVP_ERR,
 			"%s: dsp shutdown failed with error %d\n",
@@ -2285,7 +2270,7 @@ static int iris_hfi_core_release(void *dev)
 	__resume(device);
 	__set_state(device, IRIS_STATE_DEINIT);
 
-	__dsp_shutdown(device, 0);
+	__dsp_shutdown(device);
 
 	__disable_subcaches(device);
 	__unload_fw(device);
@@ -2938,7 +2923,6 @@ static int __power_collapse(struct iris_hfi_device *device, bool force)
 {
 	int rc = 0;
 	u32 wfi_status = 0, idle_status = 0, pc_ready = 0;
-	u32 flags = 0;
 	int count = 0;
 	const int max_tries = 150;
 
@@ -2959,7 +2943,7 @@ static int __power_collapse(struct iris_hfi_device *device, bool force)
 		return -EINVAL;
 	}
 
-	rc = __dsp_suspend(device, force, flags);
+	rc = __dsp_suspend(device, force);
 	if (rc == -EBUSY)
 		goto exit;
 	else if (rc)
@@ -4788,7 +4772,7 @@ static void power_off_iris2(struct iris_hfi_device *device)
 static inline int __resume(struct iris_hfi_device *device)
 {
 	int rc = 0;
-	u32 flags = 0, reg_gdsc, reg_cbcr;
+	u32 reg_gdsc, reg_cbcr;
 	struct msm_cvp_core *core;
 
 	if (!device) {
@@ -4848,7 +4832,7 @@ static inline int __resume(struct iris_hfi_device *device)
 	__set_subcaches(device);
 
 
-	__dsp_resume(device, flags);
+	__dsp_resume(device);
 
 	dprintk(CVP_PWR, "Resumed from power collapse\n");
 exit:

msm/eva/msm_cvp_dsp.c

@@ -487,7 +487,27 @@ exit:
 	return 0;
 }
 
-int cvp_dsp_suspend(uint32_t session_flag)
+static bool dsp_session_exist(void)
+{
+	struct msm_cvp_core *core;
+	struct msm_cvp_inst *inst = NULL;
+
+	core = list_first_entry(&cvp_driver->cores, struct msm_cvp_core, list);
+	if (core) {
+		mutex_lock(&core->lock);
+		list_for_each_entry(inst, &core->instances, list) {
+			if (inst->session_type == MSM_CVP_DSP) {
+				mutex_unlock(&core->lock);
+				return true;
+			}
+		}
+		mutex_unlock(&core->lock);
+	}
+
+	return false;
+}
+
+int cvp_dsp_suspend(bool force)
 {
 	int rc = 0;
 	struct cvp_dsp_cmd_msg cmd;
@@ -495,6 +515,13 @@ int cvp_dsp_suspend(uint32_t session_flag)
 	struct cvp_dsp_rsp_msg rsp;
 	bool retried = false;
 
+
+	/* If not forced to suspend, check if DSP requested PC earlier */
+	if (force == false)
+		if (dsp_session_exist())
+			if (me->state != DSP_SUSPEND)
+				return -EBUSY;
+
 	cmd.type = CPU2DSP_SUSPEND;
 
 	mutex_lock(&me->tx_lock);
@@ -546,7 +573,7 @@ exit:
 	return rc;
 }
 
-int cvp_dsp_resume(uint32_t session_flag)
+int cvp_dsp_resume(void)
 {
 	int rc = 0;
 	struct cvp_dsp_cmd_msg cmd;
@@ -610,7 +637,7 @@ static void cvp_remove_dsp_sessions(void)
 	dprintk(CVP_WARN, "%s: EVA SSR handled for CDSP\n", __func__);
 }
 
-int cvp_dsp_shutdown(uint32_t session_flag)
+int cvp_dsp_shutdown(void)
 {
 	struct cvp_dsp_apps *me = &gfa_cv;
 	int rc = 0;
@@ -860,7 +887,6 @@ void cvp_dsp_init_hfi_queue_hdr(struct iris_hfi_device *device)
 static int __reinit_dsp(void)
 {
 	int rc;
-	uint32_t flag = 0;
 	uint64_t addr;
 	uint32_t size;
 	struct cvp_dsp_apps *me = &gfa_cv;
@@ -880,7 +906,7 @@ static int __reinit_dsp(void)
 	}
 
 	/* Force shutdown DSP */
-	rc = cvp_dsp_shutdown(flag);
+	rc = cvp_dsp_shutdown();
 	if (rc)
 		return rc;
 	/*

msm/eva/msm_cvp_dsp.h

@@ -251,29 +251,20 @@ extern struct cvp_dsp_apps gfa_cv;
 /*
  * API for CVP driver to suspend CVP session during
  * power collapse
- *
- * @param session_flag
- * Flag to share details of session.
  */
-int cvp_dsp_suspend(uint32_t session_flag);
+int cvp_dsp_suspend(bool force);
 
 /*
  * API for CVP driver to resume CVP session during
  * power collapse
- *
- * @param session_flag
- * Flag to share details of session.
  */
-int cvp_dsp_resume(uint32_t session_flag);
+int cvp_dsp_resume(void);
 
 /*
  * API for CVP driver to shutdown CVP session during
  * cvp subsystem error.
- *
- * @param session_flag
- * Flag to share details of session.
  */
-int cvp_dsp_shutdown(uint32_t session_flag);
+int cvp_dsp_shutdown(void);
 
 /*
  * API to register iova buffer address with CDSP