remoteproc: qcom: Register SSR subdevice with the q6v5 IRQ driver

To allow for early notifications to be sent to the SSR clients the
q6v5 driver needs a way to invoke the SSR subdevice for the
remoteproc. This change adds an API in the q6v5 IRQ layer to
optionally register the SSR subdevice, and registers the SSR
subdevice in the PAS driver.

Change-Id: I450d262575538b6b2c2e038a41fd0cca234bc3b2
Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
Signed-off-by: Gokul krishna Krishnakumar <quic_gokukris@quicinc.com>

drivers/remoteproc/qcom_q6v5.c

@@ -53,6 +53,12 @@ int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5)
 }
 EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare);
 
+void qcom_q6v5_register_ssr_subdev(struct qcom_q6v5 *q6v5, struct rproc_subdev *ssr_subdev)
+{
+	q6v5->ssr_subdev = ssr_subdev;
+}
+EXPORT_SYMBOL(qcom_q6v5_register_ssr_subdev);
+
 static void qcom_q6v5_crash_handler_work(struct work_struct *work)
 {
 	struct qcom_q6v5 *q6v5 = container_of(work, struct qcom_q6v5, crash_handler);
@@ -242,6 +248,7 @@ int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
 	q6v5->dev = &pdev->dev;
 	q6v5->crash_reason = crash_reason;
 	q6v5->handover = handover;
+	q6v5->ssr_subdev = NULL;
 
 	init_completion(&q6v5->start_done);
 	init_completion(&q6v5->stop_done);

drivers/remoteproc/qcom_q6v5.h

@@ -26,6 +26,8 @@ struct qcom_q6v5 {
 	int handover_irq;
 	int stop_irq;
 
+	struct rproc_subdev *ssr_subdev;
+
 	struct work_struct crash_handler;
 
 	bool handover_issued;
@@ -43,7 +45,7 @@ struct qcom_q6v5 {
 int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
 		   struct rproc *rproc, int crash_reason,
 		   void (*handover)(struct qcom_q6v5 *q6v5));
-
+void qcom_q6v5_register_ssr_subdev(struct qcom_q6v5 *q6v5, struct rproc_subdev *ssr_subdev);
 int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5);
 int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5);
 int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5, struct qcom_sysmon *sysmon);

drivers/remoteproc/qcom_q6v5_pas.c

@@ -821,6 +821,8 @@ static int adsp_probe(struct platform_device *pdev)
 	if (ret)
 		goto detach_proxy_pds;
 
+	qcom_q6v5_register_ssr_subdev(&adsp->q6v5, &adsp->ssr_subdev.subdev);
+
 	timeout_disabled = qcom_pil_timeouts_disabled();
 	qcom_add_glink_subdev(rproc, &adsp->glink_subdev, desc->ssr_name);
 	qcom_add_smd_subdev(rproc, &adsp->smd_subdev);