linux-kernel - [PATCH v10 24/33] remoteproc: k3: Refactor .start rproc ops into common driver

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Message-ID: <20250417182001.3903905-25-b-padhi@ti.com>
Date: Thu, 17 Apr 2025 23:49:52 +0530
From: Beleswar Padhi <b-padhi@...com>
To: <andersson@...nel.org>, <mathieu.poirier@...aro.org>
CC: <afd@...com>, <hnagalla@...com>, <u-kumar1@...com>, <jm@...com>,
        <jan.kiszka@...mens.com>, <christophe.jaillet@...adoo.fr>,
        <jkangas@...hat.com>, <eballetbo@...hat.com>, <b-padhi@...com>,
        <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v10 24/33] 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 <b-padhi@...com>
---
v10: Changelog:
1. Don't remove dsp func override. Already done by [v10 20/33] patch.

Link to v9:
https://lore.kernel.org/all/20250317120622.1746415-18-b-padhi@ti.com/

 drivers/remoteproc/ti_k3_common.c         | 15 +++++++++++++++
 drivers/remoteproc/ti_k3_common.h         |  1 +
 drivers/remoteproc/ti_k3_dsp_remoteproc.c |  3 ++-
 drivers/remoteproc/ti_k3_m4_remoteproc.c  | 22 +---------------------
 4 files changed, 19 insertions(+), 22 deletions(-)

diff --git a/drivers/remoteproc/ti_k3_common.c b/drivers/remoteproc/ti_k3_common.c
index 0f6b68796026c..4261c3b7ba827 100644
--- a/drivers/remoteproc/ti_k3_common.c
+++ b/drivers/remoteproc/ti_k3_common.c
@@ -269,5 +269,20 @@ 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");
diff --git a/drivers/remoteproc/ti_k3_common.h b/drivers/remoteproc/ti_k3_common.h
index c1b07187c124c..51a92a3064793 100644
--- a/drivers/remoteproc/ti_k3_common.h
+++ b/drivers/remoteproc/ti_k3_common.h
@@ -95,4 +95,5 @@ 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 */
diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
index 5099d21ce066f..67d46c4a1ba61 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/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;
 
diff --git a/drivers/remoteproc/ti_k3_m4_remoteproc.c b/drivers/remoteproc/ti_k3_m4_remoteproc.c
index 6f421ebc691b3..70f186eedc6c7 100644
--- a/drivers/remoteproc/ti_k3_m4_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_m4_remoteproc.c
@@ -244,26 +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;
-	struct device *dev = kproc->dev;
-	int ret;
-
-	ret = k3_rproc_release(kproc);
-	if (ret)
-		dev_err(dev, "local-reset deassert failed, ret = %d\n", ret);
-
-	return ret;
-}
-
 /*
  * Stop the M4 remote processor.
  *
@@ -304,7 +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,
-- 
2.34.1