linux-kernel - [PATCH v5 4/4] misc: fastrpc: add support for gdsp remoteproc

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Message-ID: <20250702025341.1473332-5-quic_lxu5@quicinc.com>
Date: Wed, 2 Jul 2025 08:23:41 +0530
From: Ling Xu <quic_lxu5@...cinc.com>
To: <srini@...nel.org>, <amahesh@....qualcomm.com>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>, <andersson@...nel.org>,
        <konradybcio@...nel.org>, <arnd@...db.de>,
        <gregkh@...uxfoundation.org>
CC: <quic_kuiw@...cinc.com>, <ekansh.gupta@....qualcomm.com>,
        <devicetree@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        Ling Xu
	<quic_lxu5@...cinc.com>
Subject: [PATCH v5 4/4] misc: fastrpc: add support for gdsp remoteproc

The fastrpc driver has support for 5 types of remoteprocs. There are
some products which support GDSP remoteprocs. GDSP is General Purpose
DSP where tasks can be offloaded. This patch extends the driver to
support GDSP remoteprocs.

Signed-off-by: Ling Xu <quic_lxu5@...cinc.com>
---
 drivers/misc/fastrpc.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 441f5851eb97..2d2242d28d01 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -27,7 +27,8 @@
 #define MDSP_DOMAIN_ID (1)
 #define SDSP_DOMAIN_ID (2)
 #define CDSP_DOMAIN_ID (3)
-#define FASTRPC_DOMAIN_MAX    CDSP_DOMAIN_ID
+#define GDSP_DOMAIN_ID (4)
+#define FASTRPC_DOMAIN_MAX    GDSP_DOMAIN_ID
 #define FASTRPC_MAX_SESSIONS	14
 #define FASTRPC_MAX_VMIDS	16
 #define FASTRPC_ALIGN		128
@@ -2250,6 +2251,8 @@ static int fastrpc_get_domain_id(const char *domain)
 		return MDSP_DOMAIN_ID;
 	else if (!strncmp(domain, "sdsp", 4))
 		return SDSP_DOMAIN_ID;
+	else if (!strncmp(domain, "gdsp", 4))
+		return GDSP_DOMAIN_ID;
 
 	return -EINVAL;
 }
@@ -2324,13 +2327,14 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev)
 	case ADSP_DOMAIN_ID:
 	case MDSP_DOMAIN_ID:
 	case SDSP_DOMAIN_ID:
-		/* Unsigned PD offloading is only supported on CDSP */
+		/* Unsigned PD offloading is only supported on CDSP and GDSP */
 		data->unsigned_support = false;
 		err = fastrpc_device_register(rdev, data, secure_dsp, domain);
 		if (err)
 			goto err_free_data;
 		break;
 	case CDSP_DOMAIN_ID:
+	case GDSP_DOMAIN_ID:
 		data->unsigned_support = true;
 		/* Create both device nodes so that we can allow both Signed and Unsigned PD */
 		err = fastrpc_device_register(rdev, data, true, domain);
-- 
2.34.1