remoteproc: k3: Refactor .start rproc ops into common driver

The k3_dsp_rproc_start() function sets the boot vector and releases the
reset on the remote processor. Whereas, the k3_m4_rproc_start() function
only needs to release the reset.

Refactor the k3_m4_rproc_start() into ti_k3_common.c as k3_rproc_start()
and align the DSP and M4 drivers to invoke this common function when
releasing the reset on the remote processor.

Signed-off-by: Beleswar Padhi <[email protected]>
Tested-by: Judith Mendez <[email protected]>
Reviewed-by: Andrew Davis <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mathieu Poirier <[email protected]>

Author: 3V3RYONE

drivers/remoteproc/ti_k3_common.c

@@ -267,5 +267,20 @@ int k3_rproc_unprepare(struct rproc *rproc)
 }
 EXPORT_SYMBOL_GPL(k3_rproc_unprepare);
 
+/*
+ * Power up the remote processor.
+ *
+ * This function will be invoked only after the firmware for this rproc
+ * was loaded, parsed successfully, and all of its resource requirements
+ * were met. This callback is invoked only in remoteproc mode.
+ */
+int k3_rproc_start(struct rproc *rproc)
+{
+	struct k3_rproc *kproc = rproc->priv;
+
+	return k3_rproc_release(kproc);
+}
+EXPORT_SYMBOL_GPL(k3_rproc_start);
+
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("TI K3 common Remoteproc code");

drivers/remoteproc/ti_k3_common.h

@@ -100,4 +100,5 @@ int k3_rproc_release(struct k3_rproc *kproc);
 int k3_rproc_request_mbox(struct rproc *rproc);
 int k3_rproc_prepare(struct rproc *rproc);
 int k3_rproc_unprepare(struct rproc *rproc);
+int k3_rproc_start(struct rproc *rproc);
 #endif /* REMOTEPROC_TI_K3_COMMON_H */

drivers/remoteproc/ti_k3_dsp_remoteproc.c

@@ -50,7 +50,8 @@ static int k3_dsp_rproc_start(struct rproc *rproc)
 	if (ret)
 		return ret;
 
-	ret = k3_rproc_release(kproc);
+	/* Call the K3 common start function after doing DSP specific stuff */
+	ret = k3_rproc_start(rproc);
 	if (ret)
 		return ret;
 

drivers/remoteproc/ti_k3_m4_remoteproc.c

@@ -244,20 +244,6 @@ static void k3_m4_release_tsp(void *data)
 	ti_sci_proc_release(tsp);
 }
 
-/*
- * Power up the M4 remote processor.
- *
- * This function will be invoked only after the firmware for this rproc
- * was loaded, parsed successfully, and all of its resource requirements
- * were met. This callback is invoked only in remoteproc mode.
- */
-static int k3_m4_rproc_start(struct rproc *rproc)
-{
-	struct k3_rproc *kproc = rproc->priv;
-
-	return k3_rproc_release(kproc);
-}
-
 /*
  * Stop the M4 remote processor.
  *
@@ -298,7 +284,7 @@ static int k3_m4_rproc_detach(struct rproc *rproc)
 static const struct rproc_ops k3_m4_rproc_ops = {
 	.prepare = k3_rproc_prepare,
 	.unprepare = k3_rproc_unprepare,
-	.start = k3_m4_rproc_start,
+	.start = k3_rproc_start,
 	.stop = k3_m4_rproc_stop,
 	.attach = k3_m4_rproc_attach,
 	.detach = k3_m4_rproc_detach,